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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-06-19 09:26:03 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-06-19 09:26:03 +0000 |
| commit | 9918693037dce8aa4bb6f08741b6812923486c18 (patch) | |
| tree | 21d2b40bec7e6a7ea664acee056eb3d08e15a1cf /src/tools/clippy | |
| parent | Releasing progress-linux version 1.75.0+dfsg1-5~progress7.99u1. (diff) | |
| download | rustc-9918693037dce8aa4bb6f08741b6812923486c18.tar.xz rustc-9918693037dce8aa4bb6f08741b6812923486c18.zip | |
Merging upstream version 1.76.0+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/tools/clippy')
767 files changed, 16812 insertions, 12211 deletions
diff --git a/src/tools/clippy/.github/workflows/clippy_bors.yml b/src/tools/clippy/.github/workflows/clippy_bors.yml index f67233dec..73c255507 100644 --- a/src/tools/clippy/.github/workflows/clippy_bors.yml +++ b/src/tools/clippy/.github/workflows/clippy_bors.yml @@ -206,6 +206,7 @@ jobs: max-parallel: 6 matrix: integration: + - 'matthiaskrgr/clippy_ci_panic_test' - 'rust-lang/cargo' - 'rust-lang/chalk' - 'rust-lang/rustfmt' @@ -220,7 +221,6 @@ jobs: - 'rust-itertools/itertools' - 'rust-lang-nursery/failure' - 'rust-lang/log' - - 'matthiaskrgr/clippy_ci_panic_test' runs-on: ubuntu-latest diff --git a/src/tools/clippy/.github/workflows/deploy.yml b/src/tools/clippy/.github/workflows/deploy.yml index f42928c2c..999ee7acf 100644 --- a/src/tools/clippy/.github/workflows/deploy.yml +++ b/src/tools/clippy/.github/workflows/deploy.yml @@ -52,7 +52,9 @@ jobs: run: cargo generate-lockfile - name: Cache - uses: Swatinem/rust-cache@v1.3.0 + uses: Swatinem/rust-cache@v2.7.0 + with: + save-if: ${{ github.ref == 'refs/heads/master' }} - name: cargo collect-metadata run: cargo collect-metadata diff --git a/src/tools/clippy/CHANGELOG.md b/src/tools/clippy/CHANGELOG.md index 87a96bdeb..70aff7f60 100644 --- a/src/tools/clippy/CHANGELOG.md +++ b/src/tools/clippy/CHANGELOG.md @@ -6,11 +6,70 @@ document. ## Unreleased / Beta / In Rust Nightly -[1e8fdf49...master](https://github.com/rust-lang/rust-clippy/compare/1e8fdf49...master) +[7671c283...master](https://github.com/rust-lang/rust-clippy/compare/7671c283...master) + +## Rust 1.74 + +Current stable, released 2023-11-16 + +[View all 94 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2023-08-11T15%3A29%3A18Z..2023-09-25T08%3A48%3A22Z+base%3Amaster) + +### New Lints + +* [`redundant_as_str`] + [#11526](https://github.com/rust-lang/rust-clippy/pull/11526) +* [`needless_borrows_for_generic_args`] + [#11511](https://github.com/rust-lang/rust-clippy/pull/11511) +* [`path_ends_with_ext`] + [#11483](https://github.com/rust-lang/rust-clippy/pull/11483) +* [`unnecessary_map_on_constructor`] + [#11413](https://github.com/rust-lang/rust-clippy/pull/11413) +* [`missing_asserts_for_indexing`] + [#10692](https://github.com/rust-lang/rust-clippy/pull/10692) +* [`iter_out_of_bounds`] + [#11396](https://github.com/rust-lang/rust-clippy/pull/11396) +* [`implied_bounds_in_impls`] + [#11362](https://github.com/rust-lang/rust-clippy/pull/11362) +* [`reserve_after_initialization`] + [#11373](https://github.com/rust-lang/rust-clippy/pull/11373) +* [`should_panic_without_expect`] + [#11204](https://github.com/rust-lang/rust-clippy/pull/11204) + +### Moves and Deprecations + +* Renamed `incorrect_clone_impl_on_copy_type` to [`non_canonical_clone_impl`] + [#11358](https://github.com/rust-lang/rust-clippy/pull/11358) +* Renamed `incorrect_partial_ord_impl_on_ord_type` to [`non_canonical_partial_ord_impl`] + [#11358](https://github.com/rust-lang/rust-clippy/pull/11358) +* Moved [`non_canonical_clone_impl`] to `suspicious` (Now warn-by-default) + [#11358](https://github.com/rust-lang/rust-clippy/pull/11358) +* Moved [`non_canonical_partial_ord_impl`] to `suspicious` (Now warn-by-default) + [#11358](https://github.com/rust-lang/rust-clippy/pull/11358) +* Moved [`needless_pass_by_ref_mut`] to `nursery` (Now allow-by-default) + [#11596](https://github.com/rust-lang/rust-clippy/pull/11596) + +### Enhancements + +* [`undocumented_unsafe_blocks`]: The config values [`accept-comment-above-statement`] and + [`accept-comment-above-attributes`] to `true` by default + [#11170](https://github.com/rust-lang/rust-clippy/pull/11170) +* [`explicit_iter_loop`]: Added [`enforce-iter-loop-reborrow`] to disable reborrow linting by default + [#11418](https://github.com/rust-lang/rust-clippy/pull/11418) + +### ICE Fixes + +* [`enum_variant_names`]: No longer crashes if the threshold is 0 and the enum has no variants + [#11552](https://github.com/rust-lang/rust-clippy/pull/11552) +* [`cast_possible_truncation`]: No longer crashes on values larger than `u64::MAX` + [#11517](https://github.com/rust-lang/rust-clippy/pull/11517) +* [`tuple_array_conversions`]: No longer crashes if the array length is not usize + [#11379](https://github.com/rust-lang/rust-clippy/pull/11379) +* [`useless_conversion`]: No longer crashes, when the receiver is a non-fn item + [#11070](https://github.com/rust-lang/rust-clippy/pull/11070) ## Rust 1.73 -Current stable, released 2023-10-05 +Released 2023-10-05 [View all 103 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2023-07-02T12%3A24%3A40Z..2023-08-11T11%3A09%3A56Z+base%3Amaster) @@ -4887,6 +4946,7 @@ Released 2018-09-13 [`blanket_clippy_restriction_lints`]: https://rust-lang.github.io/rust-clippy/master/index.html#blanket_clippy_restriction_lints [`block_in_if_condition_expr`]: https://rust-lang.github.io/rust-clippy/master/index.html#block_in_if_condition_expr [`block_in_if_condition_stmt`]: https://rust-lang.github.io/rust-clippy/master/index.html#block_in_if_condition_stmt +[`blocks_in_conditions`]: https://rust-lang.github.io/rust-clippy/master/index.html#blocks_in_conditions [`blocks_in_if_conditions`]: https://rust-lang.github.io/rust-clippy/master/index.html#blocks_in_if_conditions [`bool_assert_comparison`]: https://rust-lang.github.io/rust-clippy/master/index.html#bool_assert_comparison [`bool_comparison`]: https://rust-lang.github.io/rust-clippy/master/index.html#bool_comparison @@ -5069,6 +5129,7 @@ Released 2018-09-13 [`if_then_some_else_none`]: https://rust-lang.github.io/rust-clippy/master/index.html#if_then_some_else_none [`ifs_same_cond`]: https://rust-lang.github.io/rust-clippy/master/index.html#ifs_same_cond [`ignored_unit_patterns`]: https://rust-lang.github.io/rust-clippy/master/index.html#ignored_unit_patterns +[`impl_hash_borrow_with_str_and_bytes`]: https://rust-lang.github.io/rust-clippy/master/index.html#impl_hash_borrow_with_str_and_bytes [`impl_trait_in_params`]: https://rust-lang.github.io/rust-clippy/master/index.html#impl_trait_in_params [`implicit_clone`]: https://rust-lang.github.io/rust-clippy/master/index.html#implicit_clone [`implicit_hasher`]: https://rust-lang.github.io/rust-clippy/master/index.html#implicit_hasher @@ -5085,9 +5146,11 @@ Released 2018-09-13 [`index_refutable_slice`]: https://rust-lang.github.io/rust-clippy/master/index.html#index_refutable_slice [`indexing_slicing`]: https://rust-lang.github.io/rust-clippy/master/index.html#indexing_slicing [`ineffective_bit_mask`]: https://rust-lang.github.io/rust-clippy/master/index.html#ineffective_bit_mask +[`ineffective_open_options`]: https://rust-lang.github.io/rust-clippy/master/index.html#ineffective_open_options [`inefficient_to_string`]: https://rust-lang.github.io/rust-clippy/master/index.html#inefficient_to_string [`infallible_destructuring_match`]: https://rust-lang.github.io/rust-clippy/master/index.html#infallible_destructuring_match [`infinite_iter`]: https://rust-lang.github.io/rust-clippy/master/index.html#infinite_iter +[`infinite_loop`]: https://rust-lang.github.io/rust-clippy/master/index.html#infinite_loop [`inherent_to_string`]: https://rust-lang.github.io/rust-clippy/master/index.html#inherent_to_string [`inherent_to_string_shadow_display`]: https://rust-lang.github.io/rust-clippy/master/index.html#inherent_to_string_shadow_display [`init_numbered_fields`]: https://rust-lang.github.io/rust-clippy/master/index.html#init_numbered_fields @@ -5123,12 +5186,14 @@ Released 2018-09-13 [`iter_on_empty_collections`]: https://rust-lang.github.io/rust-clippy/master/index.html#iter_on_empty_collections [`iter_on_single_items`]: https://rust-lang.github.io/rust-clippy/master/index.html#iter_on_single_items [`iter_out_of_bounds`]: https://rust-lang.github.io/rust-clippy/master/index.html#iter_out_of_bounds +[`iter_over_hash_type`]: https://rust-lang.github.io/rust-clippy/master/index.html#iter_over_hash_type [`iter_overeager_cloned`]: https://rust-lang.github.io/rust-clippy/master/index.html#iter_overeager_cloned [`iter_skip_next`]: https://rust-lang.github.io/rust-clippy/master/index.html#iter_skip_next [`iter_skip_zero`]: https://rust-lang.github.io/rust-clippy/master/index.html#iter_skip_zero [`iter_with_drain`]: https://rust-lang.github.io/rust-clippy/master/index.html#iter_with_drain [`iter_without_into_iter`]: https://rust-lang.github.io/rust-clippy/master/index.html#iter_without_into_iter [`iterator_step_by_zero`]: https://rust-lang.github.io/rust-clippy/master/index.html#iterator_step_by_zero +[`join_absolute_paths`]: https://rust-lang.github.io/rust-clippy/master/index.html#join_absolute_paths [`just_underscores_and_digits`]: https://rust-lang.github.io/rust-clippy/master/index.html#just_underscores_and_digits [`large_const_arrays`]: https://rust-lang.github.io/rust-clippy/master/index.html#large_const_arrays [`large_digit_groups`]: https://rust-lang.github.io/rust-clippy/master/index.html#large_digit_groups @@ -5320,6 +5385,7 @@ Released 2018-09-13 [`option_expect_used`]: https://rust-lang.github.io/rust-clippy/master/index.html#option_expect_used [`option_filter_map`]: https://rust-lang.github.io/rust-clippy/master/index.html#option_filter_map [`option_if_let_else`]: https://rust-lang.github.io/rust-clippy/master/index.html#option_if_let_else +[`option_map_or_err_ok`]: https://rust-lang.github.io/rust-clippy/master/index.html#option_map_or_err_ok [`option_map_or_none`]: https://rust-lang.github.io/rust-clippy/master/index.html#option_map_or_none [`option_map_unit_fn`]: https://rust-lang.github.io/rust-clippy/master/index.html#option_map_unit_fn [`option_map_unwrap_or`]: https://rust-lang.github.io/rust-clippy/master/index.html#option_map_unwrap_or @@ -5399,6 +5465,7 @@ Released 2018-09-13 [`ref_patterns`]: https://rust-lang.github.io/rust-clippy/master/index.html#ref_patterns [`regex_macro`]: https://rust-lang.github.io/rust-clippy/master/index.html#regex_macro [`repeat_once`]: https://rust-lang.github.io/rust-clippy/master/index.html#repeat_once +[`repeat_vec_with_capacity`]: https://rust-lang.github.io/rust-clippy/master/index.html#repeat_vec_with_capacity [`replace_consts`]: https://rust-lang.github.io/rust-clippy/master/index.html#replace_consts [`reserve_after_initialization`]: https://rust-lang.github.io/rust-clippy/master/index.html#reserve_after_initialization [`rest_pat_in_fully_bound_structs`]: https://rust-lang.github.io/rust-clippy/master/index.html#rest_pat_in_fully_bound_structs @@ -5482,6 +5549,7 @@ Released 2018-09-13 [`tabs_in_doc_comments`]: https://rust-lang.github.io/rust-clippy/master/index.html#tabs_in_doc_comments [`temporary_assignment`]: https://rust-lang.github.io/rust-clippy/master/index.html#temporary_assignment [`temporary_cstring_as_ptr`]: https://rust-lang.github.io/rust-clippy/master/index.html#temporary_cstring_as_ptr +[`test_attr_in_doctest`]: https://rust-lang.github.io/rust-clippy/master/index.html#test_attr_in_doctest [`tests_outside_test_module`]: https://rust-lang.github.io/rust-clippy/master/index.html#tests_outside_test_module [`to_digit_is_some`]: https://rust-lang.github.io/rust-clippy/master/index.html#to_digit_is_some [`to_string_in_display`]: https://rust-lang.github.io/rust-clippy/master/index.html#to_string_in_display @@ -5518,6 +5586,7 @@ Released 2018-09-13 [`undropped_manually_drops`]: https://rust-lang.github.io/rust-clippy/master/index.html#undropped_manually_drops [`unicode_not_nfc`]: https://rust-lang.github.io/rust-clippy/master/index.html#unicode_not_nfc [`unimplemented`]: https://rust-lang.github.io/rust-clippy/master/index.html#unimplemented +[`uninhabited_references`]: https://rust-lang.github.io/rust-clippy/master/index.html#uninhabited_references [`uninit_assumed_init`]: https://rust-lang.github.io/rust-clippy/master/index.html#uninit_assumed_init [`uninit_vec`]: https://rust-lang.github.io/rust-clippy/master/index.html#uninit_vec [`uninlined_format_args`]: https://rust-lang.github.io/rust-clippy/master/index.html#uninlined_format_args @@ -5678,4 +5747,5 @@ Released 2018-09-13 [`absolute-paths-allowed-crates`]: https://doc.rust-lang.org/clippy/lint_configuration.html#absolute-paths-allowed-crates [`allowed-dotfiles`]: https://doc.rust-lang.org/clippy/lint_configuration.html#allowed-dotfiles [`enforce-iter-loop-reborrow`]: https://doc.rust-lang.org/clippy/lint_configuration.html#enforce-iter-loop-reborrow +[`check-private-items`]: https://doc.rust-lang.org/clippy/lint_configuration.html#check-private-items <!-- end autogenerated links to configuration documentation --> diff --git a/src/tools/clippy/CONTRIBUTING.md b/src/tools/clippy/CONTRIBUTING.md index 04af1b98b..b1a59238c 100644 --- a/src/tools/clippy/CONTRIBUTING.md +++ b/src/tools/clippy/CONTRIBUTING.md @@ -146,16 +146,10 @@ For example, the [`else_if_without_else`][else_if_without_else] lint is register pub mod else_if_without_else; // ... -pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: &Conf) { +pub fn register_lints(store: &mut rustc_lint::LintStore, conf: &'static Conf) { // ... store.register_early_pass(|| Box::new(else_if_without_else::ElseIfWithoutElse)); // ... - - store.register_group(true, "clippy::restriction", Some("clippy_restriction"), vec![ - // ... - LintId::of(&else_if_without_else::ELSE_IF_WITHOUT_ELSE), - // ... - ]); } ``` diff --git a/src/tools/clippy/Cargo.toml b/src/tools/clippy/Cargo.toml index 4b6688a76..f6084a462 100644 --- a/src/tools/clippy/Cargo.toml +++ b/src/tools/clippy/Cargo.toml @@ -1,6 +1,6 @@ [package] name = "clippy" -version = "0.1.75" +version = "0.1.76" description = "A bunch of helpful lints to avoid common pitfalls in Rust" repository = "https://github.com/rust-lang/rust-clippy" readme = "README.md" @@ -37,7 +37,7 @@ toml = "0.7.3" walkdir = "2.3" # This is used by the `collect-metadata` alias. filetime = "0.2" -itertools = "0.10.1" +itertools = "0.11" # UI test dependencies clippy_utils = { path = "clippy_utils" } diff --git a/src/tools/clippy/book/src/development/adding_lints.md b/src/tools/clippy/book/src/development/adding_lints.md index 55c0e105b..e30a5f9fe 100644 --- a/src/tools/clippy/book/src/development/adding_lints.md +++ b/src/tools/clippy/book/src/development/adding_lints.md @@ -202,7 +202,7 @@ is. This file has already imported some initial things we will need: ```rust use rustc_lint::{EarlyLintPass, EarlyContext}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_ast::ast::*; ``` @@ -270,7 +270,7 @@ When using `cargo dev new_lint`, the lint is automatically registered and nothing more has to be done. When declaring a new lint by hand and `cargo dev update_lints` is used, the lint -pass may have to be registered manually in the `register_plugins` function in +pass may have to be registered manually in the `register_lints` function in `clippy_lints/src/lib.rs`: ```rust,ignore @@ -436,7 +436,7 @@ need to ensure that the MSRV configured for the project is >= the MSRV of the required Rust feature. If multiple features are required, just use the one with a lower MSRV. -First, add an MSRV alias for the required feature in [`clippy_utils::msrvs`]. +First, add an MSRV alias for the required feature in [`clippy_config::msrvs`]. This can be accessed later as `msrvs::STR_STRIP_PREFIX`, for example. ```rust @@ -506,7 +506,7 @@ fn msrv_1_45() { ``` As a last step, the lint should be added to the lint documentation. This is done -in `clippy_lints/src/utils/conf.rs`: +in `clippy_config/src/conf.rs`: ```rust define_Conf! { @@ -516,7 +516,9 @@ define_Conf! { } ``` -[`clippy_utils::msrvs`]: https://doc.rust-lang.org/nightly/nightly-rustc/clippy_utils/msrvs/index.html +[`clippy_config::msrvs`]: https://doc.rust-lang.org/nightly/nightly-rustc/clippy_config/msrvs/index.html + +Afterwards update the documentation for the book as described in [Adding configuration to a lint](#adding-configuration-to-a-lint). ## Author lint @@ -657,7 +659,7 @@ Adding a configuration to a lint can be useful for thresholds or to constrain some behavior that can be seen as a false positive for some users. Adding a configuration is done in the following steps: -1. Adding a new configuration entry to [`clippy_lints::utils::conf`] like this: +1. Adding a new configuration entry to [`clippy_config::conf`] like this: ```rust,ignore /// Lint: LINT_NAME. @@ -736,7 +738,7 @@ for some users. Adding a configuration is done in the following steps: Run `cargo collect-metadata` to generate documentation changes for the book. -[`clippy_lints::utils::conf`]: https://github.com/rust-lang/rust-clippy/blob/master/clippy_lints/src/utils/conf.rs +[`clippy_config::conf`]: https://github.com/rust-lang/rust-clippy/blob/master/clippy_config/src/conf.rs [`clippy_lints` lib file]: https://github.com/rust-lang/rust-clippy/blob/master/clippy_lints/src/lib.rs [`tests/ui`]: https://github.com/rust-lang/rust-clippy/blob/master/tests/ui [`tests/ui-toml`]: https://github.com/rust-lang/rust-clippy/blob/master/tests/ui-toml diff --git a/src/tools/clippy/book/src/development/defining_lints.md b/src/tools/clippy/book/src/development/defining_lints.md index 7c4aa5d45..54f77b001 100644 --- a/src/tools/clippy/book/src/development/defining_lints.md +++ b/src/tools/clippy/book/src/development/defining_lints.md @@ -186,7 +186,7 @@ However, sometimes we might want to declare a new lint by hand. In this case, we'd use `cargo dev update_lints` command afterwards. When a lint is manually declared, we might need to register the lint pass -manually in the `register_plugins` function in `clippy_lints/src/lib.rs`: +manually in the `register_lints` function in `clippy_lints/src/lib.rs`: ```rust store.register_late_pass(|_| Box::new(foo_functions::FooFunctions)); diff --git a/src/tools/clippy/book/src/development/type_checking.md b/src/tools/clippy/book/src/development/type_checking.md index d7c2775b8..a8c9660da 100644 --- a/src/tools/clippy/book/src/development/type_checking.md +++ b/src/tools/clippy/book/src/development/type_checking.md @@ -119,7 +119,7 @@ an `u32`. As far as `hir::Ty` is concerned those might be different types. But a understands that they're the same type, in-depth lifetimes, etc... To get from a `hir::Ty` to a `ty::Ty`, you can use the [`hir_ty_to_ty`][hir_ty_to_ty] function outside of bodies or -outside of bodies the [`TypeckResults::node_type()`][node_type] method. +the [`TypeckResults::node_type()`][node_type] method inside of bodies. > **Warning**: Don't use `hir_ty_to_ty` inside of bodies, because this can cause ICEs. diff --git a/src/tools/clippy/book/src/lint_configuration.md b/src/tools/clippy/book/src/lint_configuration.md index 841a5b6d0..2bb89321c 100644 --- a/src/tools/clippy/book/src/lint_configuration.md +++ b/src/tools/clippy/book/src/lint_configuration.md @@ -150,6 +150,7 @@ The minimum rust version that the project supports. Defaults to the `rust-versio * [`tuple_array_conversions`](https://rust-lang.github.io/rust-clippy/master/index.html#tuple_array_conversions) * [`manual_try_fold`](https://rust-lang.github.io/rust-clippy/master/index.html#manual_try_fold) * [`manual_hash_one`](https://rust-lang.github.io/rust-clippy/master/index.html#manual_hash_one) +* [`iter_kv_map`](https://rust-lang.github.io/rust-clippy/master/index.html#iter_kv_map) ## `cognitive-complexity-threshold` @@ -791,3 +792,16 @@ for _ in &mut *rmvec {} * [`explicit_iter_loop`](https://rust-lang.github.io/rust-clippy/master/index.html#explicit_iter_loop) +## `check-private-items` + + +**Default Value:** `false` + +--- +**Affected lints:** +* [`missing_safety_doc`](https://rust-lang.github.io/rust-clippy/master/index.html#missing_safety_doc) +* [`unnecessary_safety_doc`](https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_safety_doc) +* [`missing_panics_doc`](https://rust-lang.github.io/rust-clippy/master/index.html#missing_panics_doc) +* [`missing_errors_doc`](https://rust-lang.github.io/rust-clippy/master/index.html#missing_errors_doc) + + diff --git a/src/tools/clippy/clippy.toml b/src/tools/clippy/clippy.toml index cda8d17ee..4a1805f75 100644 --- a/src/tools/clippy/clippy.toml +++ b/src/tools/clippy/clippy.toml @@ -1 +1,7 @@ avoid-breaking-exported-api = false + +# use the various `span_lint_*` methods instead, which also add a link to the docs +disallowed-methods = [ + "rustc_lint::context::LintContext::struct_span_lint", + "rustc_middle::ty::context::TyCtxt::struct_span_lint_hir" +] diff --git a/src/tools/clippy/clippy_config/Cargo.toml b/src/tools/clippy/clippy_config/Cargo.toml index 2d41087b5..20f313201 100644 --- a/src/tools/clippy/clippy_config/Cargo.toml +++ b/src/tools/clippy/clippy_config/Cargo.toml @@ -1,6 +1,6 @@ [package] name = "clippy_config" -version = "0.1.75" +version = "0.1.76" edition = "2021" # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html diff --git a/src/tools/clippy/clippy_config/src/conf.rs b/src/tools/clippy/clippy_config/src/conf.rs index 472597769..88611eb70 100644 --- a/src/tools/clippy/clippy_config/src/conf.rs +++ b/src/tools/clippy/clippy_config/src/conf.rs @@ -249,7 +249,7 @@ define_Conf! { /// /// Suppress lints whenever the suggested change would cause breakage for other crates. (avoid_breaking_exported_api: bool = true), - /// Lint: MANUAL_SPLIT_ONCE, MANUAL_STR_REPEAT, CLONED_INSTEAD_OF_COPIED, REDUNDANT_FIELD_NAMES, OPTION_MAP_UNWRAP_OR, REDUNDANT_STATIC_LIFETIMES, FILTER_MAP_NEXT, CHECKED_CONVERSIONS, MANUAL_RANGE_CONTAINS, USE_SELF, MEM_REPLACE_WITH_DEFAULT, MANUAL_NON_EXHAUSTIVE, OPTION_AS_REF_DEREF, MAP_UNWRAP_OR, MATCH_LIKE_MATCHES_MACRO, MANUAL_STRIP, MISSING_CONST_FOR_FN, UNNESTED_OR_PATTERNS, FROM_OVER_INTO, PTR_AS_PTR, IF_THEN_SOME_ELSE_NONE, APPROX_CONSTANT, DEPRECATED_CFG_ATTR, INDEX_REFUTABLE_SLICE, MAP_CLONE, BORROW_AS_PTR, MANUAL_BITS, ERR_EXPECT, CAST_ABS_TO_UNSIGNED, UNINLINED_FORMAT_ARGS, MANUAL_CLAMP, MANUAL_LET_ELSE, UNCHECKED_DURATION_SUBTRACTION, COLLAPSIBLE_STR_REPLACE, SEEK_FROM_CURRENT, SEEK_REWIND, UNNECESSARY_LAZY_EVALUATIONS, TRANSMUTE_PTR_TO_REF, ALMOST_COMPLETE_RANGE, NEEDLESS_BORROW, DERIVABLE_IMPLS, MANUAL_IS_ASCII_CHECK, MANUAL_REM_EUCLID, MANUAL_RETAIN, TYPE_REPETITION_IN_BOUNDS, TUPLE_ARRAY_CONVERSIONS, MANUAL_TRY_FOLD, MANUAL_HASH_ONE. + /// Lint: MANUAL_SPLIT_ONCE, MANUAL_STR_REPEAT, CLONED_INSTEAD_OF_COPIED, REDUNDANT_FIELD_NAMES, OPTION_MAP_UNWRAP_OR, REDUNDANT_STATIC_LIFETIMES, FILTER_MAP_NEXT, CHECKED_CONVERSIONS, MANUAL_RANGE_CONTAINS, USE_SELF, MEM_REPLACE_WITH_DEFAULT, MANUAL_NON_EXHAUSTIVE, OPTION_AS_REF_DEREF, MAP_UNWRAP_OR, MATCH_LIKE_MATCHES_MACRO, MANUAL_STRIP, MISSING_CONST_FOR_FN, UNNESTED_OR_PATTERNS, FROM_OVER_INTO, PTR_AS_PTR, IF_THEN_SOME_ELSE_NONE, APPROX_CONSTANT, DEPRECATED_CFG_ATTR, INDEX_REFUTABLE_SLICE, MAP_CLONE, BORROW_AS_PTR, MANUAL_BITS, ERR_EXPECT, CAST_ABS_TO_UNSIGNED, UNINLINED_FORMAT_ARGS, MANUAL_CLAMP, MANUAL_LET_ELSE, UNCHECKED_DURATION_SUBTRACTION, COLLAPSIBLE_STR_REPLACE, SEEK_FROM_CURRENT, SEEK_REWIND, UNNECESSARY_LAZY_EVALUATIONS, TRANSMUTE_PTR_TO_REF, ALMOST_COMPLETE_RANGE, NEEDLESS_BORROW, DERIVABLE_IMPLS, MANUAL_IS_ASCII_CHECK, MANUAL_REM_EUCLID, MANUAL_RETAIN, TYPE_REPETITION_IN_BOUNDS, TUPLE_ARRAY_CONVERSIONS, MANUAL_TRY_FOLD, MANUAL_HASH_ONE, ITER_KV_MAP. /// /// The minimum rust version that the project supports. Defaults to the `rust-version` field in `Cargo.toml` #[default_text = ""] @@ -543,6 +543,10 @@ define_Conf! { /// for _ in &mut *rmvec {} /// ``` (enforce_iter_loop_reborrow: bool = false), + /// Lint: MISSING_SAFETY_DOC, UNNECESSARY_SAFETY_DOC, MISSING_PANICS_DOC, MISSING_ERRORS_DOC + /// + /// Whether to also run the listed lints on private items. + (check_private_items: bool = false), } /// Search for the configuration file. diff --git a/src/tools/clippy/clippy_config/src/msrvs.rs b/src/tools/clippy/clippy_config/src/msrvs.rs index 011d54629..b3ef666e3 100644 --- a/src/tools/clippy/clippy_config/src/msrvs.rs +++ b/src/tools/clippy/clippy_config/src/msrvs.rs @@ -23,6 +23,7 @@ msrv_aliases! { 1,62,0 { BOOL_THEN_SOME, DEFAULT_ENUM_ATTRIBUTE } 1,58,0 { FORMAT_ARGS_CAPTURE, PATTERN_TRAIT_CHAR_ARRAY } 1,55,0 { SEEK_REWIND } + 1,54,0 { INTO_KEYS } 1,53,0 { OR_PATTERNS, MANUAL_BITS, BTREE_MAP_RETAIN, BTREE_SET_RETAIN, ARRAY_INTO_ITERATOR } 1,52,0 { STR_SPLIT_ONCE, REM_EUCLID_CONST } 1,51,0 { BORROW_AS_PTR, SEEK_FROM_CURRENT, UNSIGNED_ABS } diff --git a/src/tools/clippy/clippy_config/src/types.rs b/src/tools/clippy/clippy_config/src/types.rs index e898221ff..df48cc3f5 100644 --- a/src/tools/clippy/clippy_config/src/types.rs +++ b/src/tools/clippy/clippy_config/src/types.rs @@ -1,7 +1,6 @@ use serde::de::{self, Deserializer, Visitor}; use serde::{ser, Deserialize, Serialize}; use std::fmt; -use std::hash::{Hash, Hasher}; #[derive(Clone, Debug, Deserialize)] pub struct Rename { @@ -33,32 +32,19 @@ impl DisallowedPath { } } -#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, Deserialize, Serialize)] +#[derive(Clone, Copy, Debug, PartialEq, Eq, Deserialize, Serialize)] pub enum MatchLintBehaviour { AllTypes, WellKnownTypes, Never, } -#[derive(Clone, Debug)] +#[derive(Debug)] pub struct MacroMatcher { pub name: String, - pub braces: (String, String), + pub braces: (char, char), } -impl Hash for MacroMatcher { - fn hash<H: Hasher>(&self, state: &mut H) { - self.name.hash(state); - } -} - -impl PartialEq for MacroMatcher { - fn eq(&self, other: &Self) -> bool { - self.name == other.name - } -} -impl Eq for MacroMatcher {} - impl<'de> Deserialize<'de> for MacroMatcher { fn deserialize<D>(deser: D) -> Result<Self, D::Error> where @@ -83,7 +69,7 @@ impl<'de> Deserialize<'de> for MacroMatcher { V: de::MapAccess<'de>, { let mut name = None; - let mut brace: Option<String> = None; + let mut brace: Option<char> = None; while let Some(key) = map.next_key()? { match key { Field::Name => { @@ -104,7 +90,7 @@ impl<'de> Deserialize<'de> for MacroMatcher { let brace = brace.ok_or_else(|| de::Error::missing_field("brace"))?; Ok(MacroMatcher { name, - braces: [("(", ")"), ("{", "}"), ("[", "]")] + braces: [('(', ')'), ('{', '}'), ('[', ']')] .into_iter() .find(|b| b.0 == brace) .map(|(o, c)| (o.to_owned(), c.to_owned())) diff --git a/src/tools/clippy/clippy_dev/Cargo.toml b/src/tools/clippy/clippy_dev/Cargo.toml index c3f8a782d..ce738e3f4 100644 --- a/src/tools/clippy/clippy_dev/Cargo.toml +++ b/src/tools/clippy/clippy_dev/Cargo.toml @@ -7,7 +7,7 @@ edition = "2021" aho-corasick = "0.7" clap = "4.1.4" indoc = "1.0" -itertools = "0.10.1" +itertools = "0.11" opener = "0.5" shell-escape = "0.1" walkdir = "2.3" diff --git a/src/tools/clippy/clippy_dev/src/lint.rs b/src/tools/clippy/clippy_dev/src/lint.rs index a19be1bca..906a97278 100644 --- a/src/tools/clippy/clippy_dev/src/lint.rs +++ b/src/tools/clippy/clippy_dev/src/lint.rs @@ -1,6 +1,6 @@ use crate::{cargo_clippy_path, exit_if_err}; -use std::fs; use std::process::{self, Command}; +use std::{env, fs}; pub fn run<'a>(path: &str, args: impl Iterator<Item = &'a String>) { let is_file = match fs::metadata(path) { @@ -13,7 +13,7 @@ pub fn run<'a>(path: &str, args: impl Iterator<Item = &'a String>) { if is_file { exit_if_err( - Command::new("cargo") + Command::new(env::var("CARGO").unwrap_or("cargo".into())) .args(["run", "--bin", "clippy-driver", "--"]) .args(["-L", "./target/debug"]) .args(["-Z", "no-codegen"]) @@ -23,7 +23,11 @@ pub fn run<'a>(path: &str, args: impl Iterator<Item = &'a String>) { .status(), ); } else { - exit_if_err(Command::new("cargo").arg("build").status()); + exit_if_err( + Command::new(env::var("CARGO").unwrap_or("cargo".into())) + .arg("build") + .status(), + ); let status = Command::new(cargo_clippy_path()) .arg("clippy") diff --git a/src/tools/clippy/clippy_dev/src/new_lint.rs b/src/tools/clippy/clippy_dev/src/new_lint.rs index eeea53ce4..31a42734c 100644 --- a/src/tools/clippy/clippy_dev/src/new_lint.rs +++ b/src/tools/clippy/clippy_dev/src/new_lint.rs @@ -283,7 +283,7 @@ fn get_lint_file_contents(lint: &LintData<'_>, enable_msrv: bool) -> String { use clippy_utils::msrvs::{{self, Msrv}}; {pass_import} use rustc_lint::{{{context_import}, {pass_type}, LintContext}}; - use rustc_session::{{declare_tool_lint, impl_lint_pass}}; + use rustc_session::impl_lint_pass; "# ) @@ -292,7 +292,7 @@ fn get_lint_file_contents(lint: &LintData<'_>, enable_msrv: bool) -> String { r#" {pass_import} use rustc_lint::{{{context_import}, {pass_type}}}; - use rustc_session::{{declare_lint_pass, declare_tool_lint}}; + use rustc_session::declare_lint_pass; "# ) @@ -320,8 +320,8 @@ fn get_lint_file_contents(lint: &LintData<'_>, enable_msrv: bool) -> String { extract_msrv_attr!({context_import}); }} - // TODO: Add MSRV level to `clippy_utils/src/msrvs.rs` if needed. - // TODO: Update msrv config comment in `clippy_lints/src/utils/conf.rs` + // TODO: Add MSRV level to `clippy_config/src/msrvs.rs` if needed. + // TODO: Update msrv config comment in `clippy_config/src/conf.rs` "# ) } else { diff --git a/src/tools/clippy/clippy_dev/src/serve.rs b/src/tools/clippy/clippy_dev/src/serve.rs index 535c25e69..ea925f670 100644 --- a/src/tools/clippy/clippy_dev/src/serve.rs +++ b/src/tools/clippy/clippy_dev/src/serve.rs @@ -2,8 +2,8 @@ use std::ffi::OsStr; use std::num::ParseIntError; use std::path::Path; use std::process::Command; -use std::thread; use std::time::{Duration, SystemTime}; +use std::{env, thread}; /// # Panics /// @@ -16,7 +16,7 @@ pub fn run(port: u16, lint: Option<&String>) -> ! { loop { if mtime("util/gh-pages/lints.json") < mtime("clippy_lints/src") { - Command::new("cargo") + Command::new(env::var("CARGO").unwrap_or("cargo".into())) .arg("collect-metadata") .spawn() .unwrap() diff --git a/src/tools/clippy/clippy_lints/Cargo.toml b/src/tools/clippy/clippy_lints/Cargo.toml index 4bc27fd48..ad8b7ded4 100644 --- a/src/tools/clippy/clippy_lints/Cargo.toml +++ b/src/tools/clippy/clippy_lints/Cargo.toml @@ -1,6 +1,6 @@ [package] name = "clippy_lints" -version = "0.1.75" +version = "0.1.76" description = "A bunch of helpful lints to avoid common pitfalls in Rust" repository = "https://github.com/rust-lang/rust-clippy" readme = "README.md" @@ -14,10 +14,9 @@ cargo_metadata = "0.15.3" clippy_config = { path = "../clippy_config" } clippy_utils = { path = "../clippy_utils" } declare_clippy_lint = { path = "../declare_clippy_lint" } -if_chain = "1.0" -itertools = "0.10.1" +itertools = "0.11" quine-mc_cluskey = "0.2" -regex-syntax = "0.7" +regex-syntax = "0.8" serde = { version = "1.0", features = ["derive"] } serde_json = { version = "1.0", optional = true } tempfile = { version = "3.3.0", optional = true } diff --git a/src/tools/clippy/clippy_lints/src/absolute_paths.rs b/src/tools/clippy/clippy_lints/src/absolute_paths.rs index 582423603..3822b83b4 100644 --- a/src/tools/clippy/clippy_lints/src/absolute_paths.rs +++ b/src/tools/clippy/clippy_lints/src/absolute_paths.rs @@ -5,7 +5,7 @@ use rustc_hir::def::{DefKind, Res}; use rustc_hir::def_id::{DefId, CRATE_DEF_INDEX}; use rustc_hir::{HirId, ItemKind, Node, Path}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::symbol::kw; declare_clippy_lint! { @@ -62,7 +62,7 @@ impl LateLintPass<'_> for AbsolutePaths { } = self; if !path.span.from_expansion() - && let Some(node) = cx.tcx.hir().find(hir_id) + && let Some(node) = cx.tcx.opt_hir_node(hir_id) && !matches!(node, Node::Item(item) if matches!(item.kind, ItemKind::Use(_, _))) && let [first, rest @ ..] = path.segments // Handle `::std` diff --git a/src/tools/clippy/clippy_lints/src/allow_attributes.rs b/src/tools/clippy/clippy_lints/src/allow_attributes.rs index e3f4cf79d..39fc49dee 100644 --- a/src/tools/clippy/clippy_lints/src/allow_attributes.rs +++ b/src/tools/clippy/clippy_lints/src/allow_attributes.rs @@ -5,7 +5,7 @@ use rustc_ast as ast; use rustc_errors::Applicability; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does @@ -52,24 +52,22 @@ declare_lint_pass!(AllowAttribute => [ALLOW_ATTRIBUTES]); impl LateLintPass<'_> for AllowAttribute { // Separate each crate's features. fn check_attribute<'cx>(&mut self, cx: &LateContext<'cx>, attr: &'cx Attribute) { - if_chain! { - if !in_external_macro(cx.sess(), attr.span); - if cx.tcx.features().lint_reasons; - if let AttrStyle::Outer = attr.style; - if let Some(ident) = attr.ident(); - if ident.name == rustc_span::symbol::sym::allow; - if !is_from_proc_macro(cx, &attr); - then { - span_lint_and_sugg( - cx, - ALLOW_ATTRIBUTES, - ident.span, - "#[allow] attribute found", - "replace it with", - "expect".into(), - Applicability::MachineApplicable, - ); - } + if !in_external_macro(cx.sess(), attr.span) + && cx.tcx.features().lint_reasons + && let AttrStyle::Outer = attr.style + && let Some(ident) = attr.ident() + && ident.name == rustc_span::symbol::sym::allow + && !is_from_proc_macro(cx, &attr) + { + span_lint_and_sugg( + cx, + ALLOW_ATTRIBUTES, + ident.span, + "#[allow] attribute found", + "replace it with", + "expect".into(), + Applicability::MachineApplicable, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/almost_complete_range.rs b/src/tools/clippy/clippy_lints/src/almost_complete_range.rs index e85878eb5..57a5cd8fb 100644 --- a/src/tools/clippy/clippy_lints/src/almost_complete_range.rs +++ b/src/tools/clippy/clippy_lints/src/almost_complete_range.rs @@ -5,7 +5,7 @@ use rustc_ast::ast::{Expr, ExprKind, LitKind, Pat, PatKind, RangeEnd, RangeLimit use rustc_errors::Applicability; use rustc_lint::{EarlyContext, EarlyLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::Span; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/approx_const.rs b/src/tools/clippy/clippy_lints/src/approx_const.rs index b4f778f12..409ae0c85 100644 --- a/src/tools/clippy/clippy_lints/src/approx_const.rs +++ b/src/tools/clippy/clippy_lints/src/approx_const.rs @@ -4,7 +4,7 @@ use rustc_ast::ast::{FloatTy, LitFloatType, LitKind}; use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_semver::RustcVersion; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::symbol; use std::f64::consts as f64; diff --git a/src/tools/clippy/clippy_lints/src/arc_with_non_send_sync.rs b/src/tools/clippy/clippy_lints/src/arc_with_non_send_sync.rs index 192bc7d9d..657d52d0e 100644 --- a/src/tools/clippy/clippy_lints/src/arc_with_non_send_sync.rs +++ b/src/tools/clippy/clippy_lints/src/arc_with_non_send_sync.rs @@ -6,7 +6,7 @@ use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty; use rustc_middle::ty::print::with_forced_trimmed_paths; use rustc_middle::ty::GenericArgKind; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::symbol::sym; declare_clippy_lint! { @@ -14,7 +14,9 @@ declare_clippy_lint! { /// This lint warns when you use `Arc` with a type that does not implement `Send` or `Sync`. /// /// ### Why is this bad? - /// `Arc<T>` is only `Send`/`Sync` when `T` is [both `Send` and `Sync`](https://doc.rust-lang.org/std/sync/struct.Arc.html#impl-Send-for-Arc%3CT%3E), + /// `Arc<T>` is an Atomic `RC<T>` and guarantees that updates to the reference counter are + /// Atomic. This is useful in multiprocessing scenarios. To send an `Arc<T>` across processes + /// and make use of the atomic ref counter, `T` must be [both `Send` and `Sync`](https://doc.rust-lang.org/std/sync/struct.Arc.html#impl-Send-for-Arc%3CT%3E), /// either `T` should be made `Send + Sync` or an `Rc` should be used instead of an `Arc` /// /// ### Example @@ -34,7 +36,7 @@ declare_clippy_lint! { #[clippy::version = "1.72.0"] pub ARC_WITH_NON_SEND_SYNC, suspicious, - "using `Arc` with a type that does not implement `Send` or `Sync`" + "using `Arc` with a type that does not implement `Send` and `Sync`" } declare_lint_pass!(ArcWithNonSendSync => [ARC_WITH_NON_SEND_SYNC]); @@ -61,19 +63,25 @@ impl<'tcx> LateLintPass<'tcx> for ArcWithNonSendSync { cx, ARC_WITH_NON_SEND_SYNC, expr.span, - "usage of an `Arc` that is not `Send` or `Sync`", + "usage of an `Arc` that is not `Send` and `Sync`", |diag| { with_forced_trimmed_paths!({ + diag.note(format!("`Arc<{arg_ty}>` is not `Send` and `Sync` as:")); + if !is_send { - diag.note(format!("the trait `Send` is not implemented for `{arg_ty}`")); + diag.note(format!("- the trait `Send` is not implemented for `{arg_ty}`")); } if !is_sync { - diag.note(format!("the trait `Sync` is not implemented for `{arg_ty}`")); + diag.note(format!("- the trait `Sync` is not implemented for `{arg_ty}`")); } - diag.note(format!("required for `{ty}` to implement `Send` and `Sync`")); + diag.help("consider using an `Rc` instead. `Arc` does not provide benefits for non `Send` and `Sync` types"); + + diag.note("if you intend to use `Arc` with `Send` and `Sync` traits"); - diag.help("consider using an `Rc` instead or wrapping the inner type with a `Mutex`"); + diag.note(format!( + "wrap the inner type with a `Mutex` or implement `Send` and `Sync` for `{arg_ty}`" + )); }); }, ); diff --git a/src/tools/clippy/clippy_lints/src/as_conversions.rs b/src/tools/clippy/clippy_lints/src/as_conversions.rs index 2de205d80..e3daf75c3 100644 --- a/src/tools/clippy/clippy_lints/src/as_conversions.rs +++ b/src/tools/clippy/clippy_lints/src/as_conversions.rs @@ -3,7 +3,7 @@ use clippy_utils::is_from_proc_macro; use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/asm_syntax.rs b/src/tools/clippy/clippy_lints/src/asm_syntax.rs index 9717aa9e9..feb6437ee 100644 --- a/src/tools/clippy/clippy_lints/src/asm_syntax.rs +++ b/src/tools/clippy/clippy_lints/src/asm_syntax.rs @@ -3,7 +3,7 @@ use std::fmt; use clippy_utils::diagnostics::span_lint_and_help; use rustc_ast::ast::{Expr, ExprKind, InlineAsmOptions}; use rustc_lint::{EarlyContext, EarlyLintPass, Lint}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; #[derive(Clone, Copy, PartialEq, Eq)] enum AsmStyle { diff --git a/src/tools/clippy/clippy_lints/src/assertions_on_constants.rs b/src/tools/clippy/clippy_lints/src/assertions_on_constants.rs index b90914e93..a15ec199a 100644 --- a/src/tools/clippy/clippy_lints/src/assertions_on_constants.rs +++ b/src/tools/clippy/clippy_lints/src/assertions_on_constants.rs @@ -3,7 +3,7 @@ use clippy_utils::diagnostics::span_lint_and_help; use clippy_utils::macros::{find_assert_args, root_macro_call_first_node, PanicExpn}; use rustc_hir::Expr; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/assertions_on_result_states.rs b/src/tools/clippy/clippy_lints/src/assertions_on_result_states.rs index 71ec87a88..aec22965b 100644 --- a/src/tools/clippy/clippy_lints/src/assertions_on_result_states.rs +++ b/src/tools/clippy/clippy_lints/src/assertions_on_result_states.rs @@ -9,7 +9,7 @@ use rustc_hir::def::Res; use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::{self, Ty}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/async_yields_async.rs b/src/tools/clippy/clippy_lints/src/async_yields_async.rs index ec2447dae..3e5a01c45 100644 --- a/src/tools/clippy/clippy_lints/src/async_yields_async.rs +++ b/src/tools/clippy/clippy_lints/src/async_yields_async.rs @@ -4,7 +4,7 @@ use clippy_utils::ty::implements_trait; use rustc_errors::Applicability; use rustc_hir::{Body, BodyId, CoroutineKind, CoroutineSource, ExprKind, QPath}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/attrs.rs b/src/tools/clippy/clippy_lints/src/attrs.rs index 38364af27..da3842287 100644 --- a/src/tools/clippy/clippy_lints/src/attrs.rs +++ b/src/tools/clippy/clippy_lints/src/attrs.rs @@ -5,7 +5,6 @@ use clippy_utils::diagnostics::{span_lint, span_lint_and_help, span_lint_and_sug use clippy_utils::is_from_proc_macro; use clippy_utils::macros::{is_panic, macro_backtrace}; use clippy_utils::source::{first_line_of_span, is_present_in_source, snippet_opt, without_block_comments}; -use if_chain::if_chain; use rustc_ast::token::{Token, TokenKind}; use rustc_ast::tokenstream::TokenTree; use rustc_ast::{ @@ -18,9 +17,9 @@ use rustc_hir::{ use rustc_lint::{EarlyContext, EarlyLintPass, LateContext, LateLintPass, Level, LintContext}; use rustc_middle::lint::in_external_macro; use rustc_middle::ty; -use rustc_session::{declare_lint_pass, declare_tool_lint, impl_lint_pass}; +use rustc_session::{declare_lint_pass, impl_lint_pass}; use rustc_span::symbol::Symbol; -use rustc_span::{sym, DUMMY_SP, Span}; +use rustc_span::{sym, Span, DUMMY_SP}; use semver::Version; static UNIX_SYSTEMS: &[&str] = &[ @@ -121,7 +120,8 @@ declare_clippy_lint! { declare_clippy_lint! { /// ### What it does /// Checks for `#[deprecated]` annotations with a `since` - /// field that is not a valid semantic version. + /// field that is not a valid semantic version. Also allows "TBD" to signal + /// future deprecation. /// /// ### Why is this bad? /// For checking the version of the deprecation, it must be @@ -371,7 +371,7 @@ declare_clippy_lint! { /// let _ = 1 / random(); /// } /// ``` - #[clippy::version = "1.73.0"] + #[clippy::version = "1.74.0"] pub SHOULD_PANIC_WITHOUT_EXPECT, pedantic, "ensures that all `should_panic` attributes specify its expected panic message" @@ -406,20 +406,26 @@ declare_clippy_lint! { /// Checks for `#[cfg(features = "...")]` and suggests to replace it with /// `#[cfg(feature = "...")]`. /// + /// It also checks if `cfg(test)` was misspelled. + /// /// ### Why is this bad? - /// Misspelling `feature` as `features` can be sometimes hard to spot. It + /// Misspelling `feature` as `features` or `test` as `tests` can be sometimes hard to spot. It /// may cause conditional compilation not work quietly. /// /// ### Example /// ```no_run /// #[cfg(features = "some-feature")] /// fn conditional() { } + /// #[cfg(tests)] + /// mod tests { } /// ``` /// /// Use instead: /// ```no_run /// #[cfg(feature = "some-feature")] /// fn conditional() { } + /// #[cfg(test)] + /// mod tests { } /// ``` #[clippy::version = "1.69.0"] pub MAYBE_MISUSED_CFG, @@ -470,13 +476,11 @@ impl<'tcx> LateLintPass<'tcx> for Attributes { return; } for item in items { - if_chain! { - if let NestedMetaItem::MetaItem(mi) = &item; - if let MetaItemKind::NameValue(lit) = &mi.kind; - if mi.has_name(sym::since); - then { - check_semver(cx, item.span(), lit); - } + if let NestedMetaItem::MetaItem(mi) = &item + && let MetaItemKind::NameValue(lit) = &mi.kind + && mi.has_name(sym::since) + { + check_deprecated_since(cx, item.span(), lit); } } } @@ -579,15 +583,13 @@ impl<'tcx> LateLintPass<'tcx> for Attributes { /// Returns the lint name if it is clippy lint. fn extract_clippy_lint(lint: &NestedMetaItem) -> Option<Symbol> { - if_chain! { - if let Some(meta_item) = lint.meta_item(); - if meta_item.path.segments.len() > 1; - if let tool_name = meta_item.path.segments[0].ident; - if tool_name.name == sym::clippy; - then { - let lint_name = meta_item.path.segments.last().unwrap().ident.name; - return Some(lint_name); - } + if let Some(meta_item) = lint.meta_item() + && meta_item.path.segments.len() > 1 + && let tool_name = meta_item.path.segments[0].ident + && tool_name.name == sym::clippy + { + let lint_name = meta_item.path.segments.last().unwrap().ident.name; + return Some(lint_name); } None } @@ -759,9 +761,9 @@ fn check_attrs(cx: &LateContext<'_>, span: Span, name: Symbol, attrs: &[Attribut } } -fn check_semver(cx: &LateContext<'_>, span: Span, lit: &MetaItemLit) { +fn check_deprecated_since(cx: &LateContext<'_>, span: Span, lit: &MetaItemLit) { if let LitKind::Str(is, _) = lit.kind { - if Version::parse(is.as_str()).is_ok() { + if is.as_str() == "TBD" || Version::parse(is.as_str()).is_ok() { return; } } @@ -856,18 +858,17 @@ fn check_empty_line_after_outer_attr(cx: &EarlyContext<'_>, item: &rustc_ast::It } fn check_deprecated_cfg_attr(cx: &EarlyContext<'_>, attr: &Attribute, msrv: &Msrv) { - if_chain! { - if msrv.meets(msrvs::TOOL_ATTRIBUTES); + if msrv.meets(msrvs::TOOL_ATTRIBUTES) // check cfg_attr - if attr.has_name(sym::cfg_attr); - if let Some(items) = attr.meta_item_list(); - if items.len() == 2; + && attr.has_name(sym::cfg_attr) + && let Some(items) = attr.meta_item_list() + && items.len() == 2 // check for `rustfmt` - if let Some(feature_item) = items[0].meta_item(); - if feature_item.has_name(sym::rustfmt); + && let Some(feature_item) = items[0].meta_item() + && feature_item.has_name(sym::rustfmt) // check for `rustfmt_skip` and `rustfmt::skip` - if let Some(skip_item) = &items[1].meta_item(); - if skip_item.has_name(sym!(rustfmt_skip)) + && let Some(skip_item) = &items[1].meta_item() + && (skip_item.has_name(sym!(rustfmt_skip)) || skip_item .path .segments @@ -875,21 +876,20 @@ fn check_deprecated_cfg_attr(cx: &EarlyContext<'_>, attr: &Attribute, msrv: &Msr .expect("empty path in attribute") .ident .name - == sym::skip; + == sym::skip) // Only lint outer attributes, because custom inner attributes are unstable // Tracking issue: https://github.com/rust-lang/rust/issues/54726 - if attr.style == AttrStyle::Outer; - then { - span_lint_and_sugg( - cx, - DEPRECATED_CFG_ATTR, - attr.span, - "`cfg_attr` is deprecated for rustfmt and got replaced by tool attributes", - "use", - "#[rustfmt::skip]".to_string(), - Applicability::MachineApplicable, - ); - } + && attr.style == AttrStyle::Outer + { + span_lint_and_sugg( + cx, + DEPRECATED_CFG_ATTR, + attr.span, + "`cfg_attr` is deprecated for rustfmt and got replaced by tool attributes", + "use", + "#[rustfmt::skip]".to_string(), + Applicability::MachineApplicable, + ); } } @@ -930,21 +930,35 @@ fn check_nested_cfg(cx: &EarlyContext<'_>, items: &[NestedMetaItem]) { fn check_nested_misused_cfg(cx: &EarlyContext<'_>, items: &[NestedMetaItem]) { for item in items { if let NestedMetaItem::MetaItem(meta) = item { - if meta.has_name(sym!(features)) + if let Some(ident) = meta.ident() + && ident.name.as_str() == "features" && let Some(val) = meta.value_str() { span_lint_and_sugg( cx, MAYBE_MISUSED_CFG, meta.span, - "feature may misspelled as features", - "use", + "'feature' may be misspelled as 'features'", + "did you mean", format!("feature = \"{val}\""), Applicability::MaybeIncorrect, ); } if let MetaItemKind::List(list) = &meta.kind { check_nested_misused_cfg(cx, list); + // If this is not a list, then we check for `cfg(test)`. + } else if let Some(ident) = meta.ident() + && matches!(ident.name.as_str(), "tests" | "Test") + { + span_lint_and_sugg( + cx, + MAYBE_MISUSED_CFG, + meta.span, + &format!("'test' may be misspelled as '{}'", ident.name.as_str()), + "did you mean", + "test".to_string(), + Applicability::MaybeIncorrect, + ); } } } @@ -989,12 +1003,10 @@ fn check_mismatched_target_os(cx: &EarlyContext<'_>, attr: &Attribute) { mismatched.extend(find_mismatched_target_os(list)); }, MetaItemKind::Word => { - if_chain! { - if let Some(ident) = meta.ident(); - if let Some(os) = find_os(ident.name.as_str()); - then { - mismatched.push((os, ident.span)); - } + if let Some(ident) = meta.ident() + && let Some(os) = find_os(ident.name.as_str()) + { + mismatched.push((os, ident.span)); } }, MetaItemKind::NameValue(..) => {}, @@ -1005,30 +1017,28 @@ fn check_mismatched_target_os(cx: &EarlyContext<'_>, attr: &Attribute) { mismatched } - if_chain! { - if attr.has_name(sym::cfg); - if let Some(list) = attr.meta_item_list(); - let mismatched = find_mismatched_target_os(&list); - if !mismatched.is_empty(); - then { - let mess = "operating system used in target family position"; - - span_lint_and_then(cx, MISMATCHED_TARGET_OS, attr.span, mess, |diag| { - // Avoid showing the unix suggestion multiple times in case - // we have more than one mismatch for unix-like systems - let mut unix_suggested = false; - - for (os, span) in mismatched { - let sugg = format!("target_os = \"{os}\""); - diag.span_suggestion(span, "try", sugg, Applicability::MaybeIncorrect); - - if !unix_suggested && is_unix(os) { - diag.help("did you mean `unix`?"); - unix_suggested = true; - } + if attr.has_name(sym::cfg) + && let Some(list) = attr.meta_item_list() + && let mismatched = find_mismatched_target_os(&list) + && !mismatched.is_empty() + { + let mess = "operating system used in target family position"; + + span_lint_and_then(cx, MISMATCHED_TARGET_OS, attr.span, mess, |diag| { + // Avoid showing the unix suggestion multiple times in case + // we have more than one mismatch for unix-like systems + let mut unix_suggested = false; + + for (os, span) in mismatched { + let sugg = format!("target_os = \"{os}\""); + diag.span_suggestion(span, "try", sugg, Applicability::MaybeIncorrect); + + if !unix_suggested && is_unix(os) { + diag.help("did you mean `unix`?"); + unix_suggested = true; } - }); - } + } + }); } } diff --git a/src/tools/clippy/clippy_lints/src/await_holding_invalid.rs b/src/tools/clippy/clippy_lints/src/await_holding_invalid.rs index 06b74b972..9894a1639 100644 --- a/src/tools/clippy/clippy_lints/src/await_holding_invalid.rs +++ b/src/tools/clippy/clippy_lints/src/await_holding_invalid.rs @@ -6,7 +6,7 @@ use rustc_hir::def_id::DefId; use rustc_hir::{Body, CoroutineKind, CoroutineSource}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::mir::CoroutineLayout; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::{sym, Span}; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/blocks_in_conditions.rs b/src/tools/clippy/clippy_lints/src/blocks_in_conditions.rs new file mode 100644 index 000000000..1417e230a --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/blocks_in_conditions.rs @@ -0,0 +1,137 @@ +use clippy_utils::diagnostics::{span_lint, span_lint_and_sugg}; +use clippy_utils::source::snippet_block_with_applicability; +use clippy_utils::ty::implements_trait; +use clippy_utils::visitors::{for_each_expr, Descend}; +use clippy_utils::{get_parent_expr, higher}; +use core::ops::ControlFlow; +use rustc_errors::Applicability; +use rustc_hir::{BlockCheckMode, Expr, ExprKind, MatchSource}; +use rustc_lint::{LateContext, LateLintPass, LintContext}; +use rustc_middle::lint::in_external_macro; +use rustc_session::declare_lint_pass; +use rustc_span::sym; + +declare_clippy_lint! { + /// ### What it does + /// Checks for `if` conditions that use blocks containing an + /// expression, statements or conditions that use closures with blocks. + /// + /// ### Why is this bad? + /// Style, using blocks in the condition makes it hard to read. + /// + /// ### Examples + /// ```no_run + /// # fn somefunc() -> bool { true }; + /// if { true } { /* ... */ } + /// + /// if { let x = somefunc(); x } { /* ... */ } + /// ``` + /// + /// Use instead: + /// ```no_run + /// # fn somefunc() -> bool { true }; + /// if true { /* ... */ } + /// + /// let res = { let x = somefunc(); x }; + /// if res { /* ... */ } + /// ``` + #[clippy::version = "1.45.0"] + pub BLOCKS_IN_CONDITIONS, + style, + "useless or complex blocks that can be eliminated in conditions" +} + +declare_lint_pass!(BlocksInConditions => [BLOCKS_IN_CONDITIONS]); + +const BRACED_EXPR_MESSAGE: &str = "omit braces around single expression condition"; + +impl<'tcx> LateLintPass<'tcx> for BlocksInConditions { + fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) { + if in_external_macro(cx.sess(), expr.span) { + return; + } + + let Some((cond, keyword, desc)) = higher::If::hir(expr) + .map(|hif| (hif.cond, "if", "an `if` condition")) + .or(if let ExprKind::Match(match_ex, _, MatchSource::Normal) = expr.kind { + Some((match_ex, "match", "a `match` scrutinee")) + } else { + None + }) + else { + return; + }; + let complex_block_message = &format!( + "in {desc}, avoid complex blocks or closures with blocks; \ + instead, move the block or closure higher and bind it with a `let`", + ); + + if let ExprKind::Block(block, _) = &cond.kind { + if block.rules == BlockCheckMode::DefaultBlock { + if block.stmts.is_empty() { + if let Some(ex) = &block.expr { + // don't dig into the expression here, just suggest that they remove + // the block + if expr.span.from_expansion() || ex.span.from_expansion() { + return; + } + let mut applicability = Applicability::MachineApplicable; + span_lint_and_sugg( + cx, + BLOCKS_IN_CONDITIONS, + cond.span, + BRACED_EXPR_MESSAGE, + "try", + snippet_block_with_applicability(cx, ex.span, "..", Some(expr.span), &mut applicability) + .to_string(), + applicability, + ); + } + } else { + let span = block.expr.as_ref().map_or_else(|| block.stmts[0].span, |e| e.span); + if span.from_expansion() || expr.span.from_expansion() { + return; + } + // move block higher + let mut applicability = Applicability::MachineApplicable; + span_lint_and_sugg( + cx, + BLOCKS_IN_CONDITIONS, + expr.span.with_hi(cond.span.hi()), + complex_block_message, + "try", + format!( + "let res = {}; {keyword} res", + snippet_block_with_applicability(cx, block.span, "..", Some(expr.span), &mut applicability), + ), + applicability, + ); + } + } + } else { + let _: Option<!> = for_each_expr(cond, |e| { + if let ExprKind::Closure(closure) = e.kind { + // do not lint if the closure is called using an iterator (see #1141) + if let Some(parent) = get_parent_expr(cx, e) + && let ExprKind::MethodCall(_, self_arg, _, _) = &parent.kind + && let caller = cx.typeck_results().expr_ty(self_arg) + && let Some(iter_id) = cx.tcx.get_diagnostic_item(sym::Iterator) + && implements_trait(cx, caller, iter_id, &[]) + { + return ControlFlow::Continue(Descend::No); + } + + let body = cx.tcx.hir().body(closure.body); + let ex = &body.value; + if let ExprKind::Block(block, _) = ex.kind { + if !body.value.span.from_expansion() && !block.stmts.is_empty() { + span_lint(cx, BLOCKS_IN_CONDITIONS, ex.span, complex_block_message); + return ControlFlow::Continue(Descend::No); + } + } + } + ControlFlow::Continue(Descend::Yes) + }); + } + } +} diff --git a/src/tools/clippy/clippy_lints/src/blocks_in_if_conditions.rs b/src/tools/clippy/clippy_lints/src/blocks_in_if_conditions.rs deleted file mode 100644 index 04bf541a5..000000000 --- a/src/tools/clippy/clippy_lints/src/blocks_in_if_conditions.rs +++ /dev/null @@ -1,142 +0,0 @@ -use clippy_utils::diagnostics::{span_lint, span_lint_and_sugg}; -use clippy_utils::source::snippet_block_with_applicability; -use clippy_utils::ty::implements_trait; -use clippy_utils::visitors::{for_each_expr, Descend}; -use clippy_utils::{get_parent_expr, higher}; -use core::ops::ControlFlow; -use if_chain::if_chain; -use rustc_errors::Applicability; -use rustc_hir::{BlockCheckMode, Expr, ExprKind}; -use rustc_lint::{LateContext, LateLintPass, LintContext}; -use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_lint_pass, declare_tool_lint}; -use rustc_span::sym; - -declare_clippy_lint! { - /// ### What it does - /// Checks for `if` conditions that use blocks containing an - /// expression, statements or conditions that use closures with blocks. - /// - /// ### Why is this bad? - /// Style, using blocks in the condition makes it hard to read. - /// - /// ### Examples - /// ```no_run - /// # fn somefunc() -> bool { true }; - /// if { true } { /* ... */ } - /// - /// if { let x = somefunc(); x } { /* ... */ } - /// ``` - /// - /// Use instead: - /// ```no_run - /// # fn somefunc() -> bool { true }; - /// if true { /* ... */ } - /// - /// let res = { let x = somefunc(); x }; - /// if res { /* ... */ } - /// ``` - #[clippy::version = "1.45.0"] - pub BLOCKS_IN_IF_CONDITIONS, - style, - "useless or complex blocks that can be eliminated in conditions" -} - -declare_lint_pass!(BlocksInIfConditions => [BLOCKS_IN_IF_CONDITIONS]); - -const BRACED_EXPR_MESSAGE: &str = "omit braces around single expression condition"; -const COMPLEX_BLOCK_MESSAGE: &str = "in an `if` condition, avoid complex blocks or closures with blocks; \ - instead, move the block or closure higher and bind it with a `let`"; - -impl<'tcx> LateLintPass<'tcx> for BlocksInIfConditions { - fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) { - if in_external_macro(cx.sess(), expr.span) { - return; - } - if let Some(higher::If { cond, .. }) = higher::If::hir(expr) { - if let ExprKind::Block(block, _) = &cond.kind { - if block.rules == BlockCheckMode::DefaultBlock { - if block.stmts.is_empty() { - if let Some(ex) = &block.expr { - // don't dig into the expression here, just suggest that they remove - // the block - if expr.span.from_expansion() || ex.span.from_expansion() { - return; - } - let mut applicability = Applicability::MachineApplicable; - span_lint_and_sugg( - cx, - BLOCKS_IN_IF_CONDITIONS, - cond.span, - BRACED_EXPR_MESSAGE, - "try", - format!( - "{}", - snippet_block_with_applicability( - cx, - ex.span, - "..", - Some(expr.span), - &mut applicability - ) - ), - applicability, - ); - } - } else { - let span = block.expr.as_ref().map_or_else(|| block.stmts[0].span, |e| e.span); - if span.from_expansion() || expr.span.from_expansion() { - return; - } - // move block higher - let mut applicability = Applicability::MachineApplicable; - span_lint_and_sugg( - cx, - BLOCKS_IN_IF_CONDITIONS, - expr.span.with_hi(cond.span.hi()), - COMPLEX_BLOCK_MESSAGE, - "try", - format!( - "let res = {}; if res", - snippet_block_with_applicability( - cx, - block.span, - "..", - Some(expr.span), - &mut applicability - ), - ), - applicability, - ); - } - } - } else { - let _: Option<!> = for_each_expr(cond, |e| { - if let ExprKind::Closure(closure) = e.kind { - // do not lint if the closure is called using an iterator (see #1141) - if_chain! { - if let Some(parent) = get_parent_expr(cx, e); - if let ExprKind::MethodCall(_, self_arg, _, _) = &parent.kind; - let caller = cx.typeck_results().expr_ty(self_arg); - if let Some(iter_id) = cx.tcx.get_diagnostic_item(sym::Iterator); - if implements_trait(cx, caller, iter_id, &[]); - then { - return ControlFlow::Continue(Descend::No); - } - } - - let body = cx.tcx.hir().body(closure.body); - let ex = &body.value; - if let ExprKind::Block(block, _) = ex.kind { - if !body.value.span.from_expansion() && !block.stmts.is_empty() { - span_lint(cx, BLOCKS_IN_IF_CONDITIONS, ex.span, COMPLEX_BLOCK_MESSAGE); - return ControlFlow::Continue(Descend::No); - } - } - } - ControlFlow::Continue(Descend::Yes) - }); - } - } - } -} diff --git a/src/tools/clippy/clippy_lints/src/bool_assert_comparison.rs b/src/tools/clippy/clippy_lints/src/bool_assert_comparison.rs index 665dbd6f7..74201e9cc 100644 --- a/src/tools/clippy/clippy_lints/src/bool_assert_comparison.rs +++ b/src/tools/clippy/clippy_lints/src/bool_assert_comparison.rs @@ -7,7 +7,7 @@ use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind, Lit}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::ty::{self, Ty}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::symbol::Ident; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/bool_to_int_with_if.rs b/src/tools/clippy/clippy_lints/src/bool_to_int_with_if.rs index 156cb34df..cfb76cab6 100644 --- a/src/tools/clippy/clippy_lints/src/bool_to_int_with_if.rs +++ b/src/tools/clippy/clippy_lints/src/bool_to_int_with_if.rs @@ -2,7 +2,7 @@ use clippy_utils::higher::If; use rustc_ast::LitKind; use rustc_hir::{Block, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::sugg::Sugg; diff --git a/src/tools/clippy/clippy_lints/src/booleans.rs b/src/tools/clippy/clippy_lints/src/booleans.rs index 0e0d229e8..e11f83f22 100644 --- a/src/tools/clippy/clippy_lints/src/booleans.rs +++ b/src/tools/clippy/clippy_lints/src/booleans.rs @@ -2,13 +2,12 @@ use clippy_utils::diagnostics::{span_lint_and_sugg, span_lint_hir_and_then}; use clippy_utils::eq_expr_value; use clippy_utils::source::snippet_opt; use clippy_utils::ty::{implements_trait, is_type_diagnostic_item}; -use if_chain::if_chain; use rustc_ast::ast::LitKind; use rustc_errors::Applicability; use rustc_hir::intravisit::{walk_expr, FnKind, Visitor}; use rustc_hir::{BinOpKind, Body, Expr, ExprKind, FnDecl, UnOp}; use rustc_lint::{LateContext, LateLintPass, Level}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::def_id::LocalDefId; use rustc_span::{sym, Span}; @@ -151,17 +150,15 @@ impl<'a, 'tcx, 'v> Hir2Qmm<'a, 'tcx, 'v> { return Ok(Bool::Term(n as u8)); } - if_chain! { - if let ExprKind::Binary(e_binop, e_lhs, e_rhs) = &e.kind; - if implements_ord(self.cx, e_lhs); - if let ExprKind::Binary(expr_binop, expr_lhs, expr_rhs) = &expr.kind; - if negate(e_binop.node) == Some(expr_binop.node); - if eq_expr_value(self.cx, e_lhs, expr_lhs); - if eq_expr_value(self.cx, e_rhs, expr_rhs); - then { - #[expect(clippy::cast_possible_truncation)] - return Ok(Bool::Not(Box::new(Bool::Term(n as u8)))); - } + if let ExprKind::Binary(e_binop, e_lhs, e_rhs) = &e.kind + && implements_ord(self.cx, e_lhs) + && let ExprKind::Binary(expr_binop, expr_lhs, expr_rhs) = &expr.kind + && negate(e_binop.node) == Some(expr_binop.node) + && eq_expr_value(self.cx, e_lhs, expr_lhs) + && eq_expr_value(self.cx, e_rhs, expr_rhs) + { + #[expect(clippy::cast_possible_truncation)] + return Ok(Bool::Not(Box::new(Bool::Term(n as u8)))); } } let n = self.terminals.len(); @@ -427,8 +424,9 @@ impl<'a, 'tcx> NonminimalBoolVisitor<'a, 'tcx> { improvements.push(suggestion); } } - let nonminimal_bool_lint = |suggestions: Vec<_>| { + let nonminimal_bool_lint = |mut suggestions: Vec<_>| { if self.cx.tcx.lint_level_at_node(NONMINIMAL_BOOL, e.hir_id).0 != Level::Allow { + suggestions.sort(); span_lint_hir_and_then( self.cx, NONMINIMAL_BOOL, diff --git a/src/tools/clippy/clippy_lints/src/borrow_deref_ref.rs b/src/tools/clippy/clippy_lints/src/borrow_deref_ref.rs index a38269083..0ca4a0e06 100644 --- a/src/tools/clippy/clippy_lints/src/borrow_deref_ref.rs +++ b/src/tools/clippy/clippy_lints/src/borrow_deref_ref.rs @@ -8,7 +8,7 @@ use rustc_hir::{ExprKind, UnOp}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::mir::Mutability; use rustc_middle::ty; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/box_default.rs b/src/tools/clippy/clippy_lints/src/box_default.rs index 9c78c6e53..ef12fe344 100644 --- a/src/tools/clippy/clippy_lints/src/box_default.rs +++ b/src/tools/clippy/clippy_lints/src/box_default.rs @@ -10,7 +10,7 @@ use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; use rustc_middle::ty::print::with_forced_trimmed_paths; use rustc_middle::ty::IsSuggestable; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { @@ -45,7 +45,7 @@ impl LateLintPass<'_> for BoxDefault { && let ExprKind::Path(QPath::TypeRelative(ty, seg)) = box_new.kind && let ExprKind::Call(arg_path, ..) = arg.kind && !in_external_macro(cx.sess(), expr.span) - && (expr.span.eq_ctxt(arg.span) || is_vec_expn(cx, arg)) + && (expr.span.eq_ctxt(arg.span) || is_local_vec_expn(cx, arg, expr)) && seg.ident.name == sym::new && path_def_id(cx, ty).map_or(false, |id| Some(id) == cx.tcx.lang_items().owned_box()) && is_default_equivalent(cx, arg) @@ -81,10 +81,10 @@ fn is_plain_default(cx: &LateContext<'_>, arg_path: &Expr<'_>) -> bool { } } -fn is_vec_expn(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool { - macro_backtrace(expr.span) - .next() - .map_or(false, |call| cx.tcx.is_diagnostic_item(sym::vec_macro, call.def_id)) +fn is_local_vec_expn(cx: &LateContext<'_>, expr: &Expr<'_>, ref_expr: &Expr<'_>) -> bool { + macro_backtrace(expr.span).next().map_or(false, |call| { + cx.tcx.is_diagnostic_item(sym::vec_macro, call.def_id) && call.span.eq_ctxt(ref_expr.span) + }) } #[derive(Default)] diff --git a/src/tools/clippy/clippy_lints/src/cargo/mod.rs b/src/tools/clippy/clippy_lints/src/cargo/mod.rs index 3a872e54c..fea6924d8 100644 --- a/src/tools/clippy/clippy_lints/src/cargo/mod.rs +++ b/src/tools/clippy/clippy_lints/src/cargo/mod.rs @@ -8,7 +8,7 @@ use clippy_utils::diagnostics::span_lint; use clippy_utils::is_lint_allowed; use rustc_hir::hir_id::CRATE_HIR_ID; use rustc_lint::{LateContext, LateLintPass, Lint}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::DUMMY_SP; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/cargo/multiple_crate_versions.rs b/src/tools/clippy/clippy_lints/src/cargo/multiple_crate_versions.rs index f7a5b1857..ec681adb7 100644 --- a/src/tools/clippy/clippy_lints/src/cargo/multiple_crate_versions.rs +++ b/src/tools/clippy/clippy_lints/src/cargo/multiple_crate_versions.rs @@ -2,7 +2,6 @@ use cargo_metadata::{DependencyKind, Metadata, Node, Package, PackageId}; use clippy_utils::diagnostics::span_lint; -use if_chain::if_chain; use itertools::Itertools; use rustc_hir::def_id::LOCAL_CRATE; use rustc_lint::LateContext; @@ -15,31 +14,33 @@ pub(super) fn check(cx: &LateContext<'_>, metadata: &Metadata) { let mut packages = metadata.packages.clone(); packages.sort_by(|a, b| a.name.cmp(&b.name)); - if_chain! { - if let Some(resolve) = &metadata.resolve; - if let Some(local_id) = packages - .iter() - .find_map(|p| if p.name == local_name.as_str() { Some(&p.id) } else { None }); - then { - for (name, group) in &packages.iter().group_by(|p| p.name.clone()) { - let group: Vec<&Package> = group.collect(); - - if group.len() <= 1 { - continue; - } - - if group.iter().all(|p| is_normal_dep(&resolve.nodes, local_id, &p.id)) { - let mut versions: Vec<_> = group.into_iter().map(|p| &p.version).collect(); - versions.sort(); - let versions = versions.iter().join(", "); - - span_lint( - cx, - MULTIPLE_CRATE_VERSIONS, - DUMMY_SP, - &format!("multiple versions for dependency `{name}`: {versions}"), - ); - } + if let Some(resolve) = &metadata.resolve + && let Some(local_id) = packages.iter().find_map(|p| { + if p.name == local_name.as_str() { + Some(&p.id) + } else { + None + } + }) + { + for (name, group) in &packages.iter().group_by(|p| p.name.clone()) { + let group: Vec<&Package> = group.collect(); + + if group.len() <= 1 { + continue; + } + + if group.iter().all(|p| is_normal_dep(&resolve.nodes, local_id, &p.id)) { + let mut versions: Vec<_> = group.into_iter().map(|p| &p.version).collect(); + versions.sort(); + let versions = versions.iter().join(", "); + + span_lint( + cx, + MULTIPLE_CRATE_VERSIONS, + DUMMY_SP, + &format!("multiple versions for dependency `{name}`: {versions}"), + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/cargo/wildcard_dependencies.rs b/src/tools/clippy/clippy_lints/src/cargo/wildcard_dependencies.rs index 4dcc9cbe3..244e98eb6 100644 --- a/src/tools/clippy/clippy_lints/src/cargo/wildcard_dependencies.rs +++ b/src/tools/clippy/clippy_lints/src/cargo/wildcard_dependencies.rs @@ -1,6 +1,5 @@ use cargo_metadata::Metadata; use clippy_utils::diagnostics::span_lint; -use if_chain::if_chain; use rustc_lint::LateContext; use rustc_span::DUMMY_SP; @@ -9,19 +8,17 @@ use super::WILDCARD_DEPENDENCIES; pub(super) fn check(cx: &LateContext<'_>, metadata: &Metadata) { for dep in &metadata.packages[0].dependencies { // VersionReq::any() does not work - if_chain! { - if let Ok(wildcard_ver) = semver::VersionReq::parse("*"); - if let Some(ref source) = dep.source; - if !source.starts_with("git"); - if dep.req == wildcard_ver; - then { - span_lint( - cx, - WILDCARD_DEPENDENCIES, - DUMMY_SP, - &format!("wildcard dependency for `{}`", dep.name), - ); - } + if let Ok(wildcard_ver) = semver::VersionReq::parse("*") + && let Some(ref source) = dep.source + && !source.starts_with("git") + && dep.req == wildcard_ver + { + span_lint( + cx, + WILDCARD_DEPENDENCIES, + DUMMY_SP, + &format!("wildcard dependency for `{}`", dep.name), + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/casts/as_ptr_cast_mut.rs b/src/tools/clippy/clippy_lints/src/casts/as_ptr_cast_mut.rs index 55294f5f3..8bfb7383f 100644 --- a/src/tools/clippy/clippy_lints/src/casts/as_ptr_cast_mut.rs +++ b/src/tools/clippy/clippy_lints/src/casts/as_ptr_cast_mut.rs @@ -9,11 +9,10 @@ use rustc_middle::ty::{self, Ty, TypeAndMut}; use super::AS_PTR_CAST_MUT; pub(super) fn check(cx: &LateContext<'_>, expr: &Expr<'_>, cast_expr: &Expr<'_>, cast_to: Ty<'_>) { - if let ty::RawPtr( - ptrty @ TypeAndMut { - mutbl: Mutability::Mut, .. - }, - ) = cast_to.kind() + if let ty::RawPtr(TypeAndMut { + mutbl: Mutability::Mut, + ty: ptrty, + }) = cast_to.kind() && let ty::RawPtr(TypeAndMut { mutbl: Mutability::Not, .. }) = cx.typeck_results().node_type(cast_expr.hir_id).kind() @@ -34,7 +33,7 @@ pub(super) fn check(cx: &LateContext<'_>, expr: &Expr<'_>, cast_expr: &Expr<'_>, cx, AS_PTR_CAST_MUT, expr.span, - &format!("casting the result of `as_ptr` to *{ptrty}"), + &format!("casting the result of `as_ptr` to *mut {ptrty}"), "replace with", format!("{recv}.as_mut_ptr()"), applicability, diff --git a/src/tools/clippy/clippy_lints/src/casts/cast_possible_wrap.rs b/src/tools/clippy/clippy_lints/src/casts/cast_possible_wrap.rs index ffa571abb..2ddb0f00e 100644 --- a/src/tools/clippy/clippy_lints/src/casts/cast_possible_wrap.rs +++ b/src/tools/clippy/clippy_lints/src/casts/cast_possible_wrap.rs @@ -1,5 +1,6 @@ +use clippy_utils::diagnostics::span_lint_and_then; use rustc_hir::Expr; -use rustc_lint::{LateContext, LintContext}; +use rustc_lint::LateContext; use rustc_middle::ty::Ty; use super::{utils, CAST_POSSIBLE_WRAP}; @@ -78,13 +79,11 @@ pub(super) fn check(cx: &LateContext<'_>, expr: &Expr<'_>, cast_from: Ty<'_>, ca ), }; - cx.struct_span_lint(CAST_POSSIBLE_WRAP, expr.span, message, |diag| { + span_lint_and_then(cx, CAST_POSSIBLE_WRAP, expr.span, &message, |diag| { if let EmitState::LintOnPtrSize(16) = should_lint { diag - .note("`usize` and `isize` may be as small as 16 bits on some platforms") - .note("for more information see https://doc.rust-lang.org/reference/types/numeric.html#machine-dependent-integer-types") - } else { - diag - } + .note("`usize` and `isize` may be as small as 16 bits on some platforms") + .note("for more information see https://doc.rust-lang.org/reference/types/numeric.html#machine-dependent-integer-types"); + }; }); } diff --git a/src/tools/clippy/clippy_lints/src/casts/cast_sign_loss.rs b/src/tools/clippy/clippy_lints/src/casts/cast_sign_loss.rs index a83dfd94d..bd12ee406 100644 --- a/src/tools/clippy/clippy_lints/src/casts/cast_sign_loss.rs +++ b/src/tools/clippy/clippy_lints/src/casts/cast_sign_loss.rs @@ -1,7 +1,6 @@ use clippy_utils::consts::{constant, Constant}; use clippy_utils::diagnostics::span_lint; use clippy_utils::{method_chain_args, sext}; -use if_chain::if_chain; use rustc_hir::{Expr, ExprKind}; use rustc_lint::LateContext; use rustc_middle::ty::{self, Ty}; @@ -28,13 +27,11 @@ fn should_lint(cx: &LateContext<'_>, cast_op: &Expr<'_>, cast_from: Ty<'_>, cast // Don't lint for positive constants. let const_val = constant(cx, cx.typeck_results(), cast_op); - if_chain! { - if let Some(Constant::Int(n)) = const_val; - if let ty::Int(ity) = *cast_from.kind(); - if sext(cx.tcx, n, ity) >= 0; - then { - return false; - } + if let Some(Constant::Int(n)) = const_val + && let ty::Int(ity) = *cast_from.kind() + && sext(cx.tcx, n, ity) >= 0 + { + return false; } // Don't lint for the result of methods that always return non-negative values. @@ -42,13 +39,11 @@ fn should_lint(cx: &LateContext<'_>, cast_op: &Expr<'_>, cast_from: Ty<'_>, cast let mut method_name = path.ident.name.as_str(); let allowed_methods = ["abs", "checked_abs", "rem_euclid", "checked_rem_euclid"]; - if_chain! { - if method_name == "unwrap"; - if let Some(arglist) = method_chain_args(cast_op, &["unwrap"]); - if let ExprKind::MethodCall(inner_path, ..) = &arglist[0].0.kind; - then { - method_name = inner_path.ident.name.as_str(); - } + if method_name == "unwrap" + && let Some(arglist) = method_chain_args(cast_op, &["unwrap"]) + && let ExprKind::MethodCall(inner_path, ..) = &arglist[0].0.kind + { + method_name = inner_path.ident.name.as_str(); } if allowed_methods.iter().any(|&name| method_name == name) { diff --git a/src/tools/clippy/clippy_lints/src/casts/cast_slice_different_sizes.rs b/src/tools/clippy/clippy_lints/src/casts/cast_slice_different_sizes.rs index d14104029..91bad8256 100644 --- a/src/tools/clippy/clippy_lints/src/casts/cast_slice_different_sizes.rs +++ b/src/tools/clippy/clippy_lints/src/casts/cast_slice_different_sizes.rs @@ -1,7 +1,6 @@ use clippy_config::msrvs::{self, Msrv}; use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::source; -use if_chain::if_chain; use rustc_ast::Mutability; use rustc_hir::{Expr, ExprKind, Node}; use rustc_lint::LateContext; @@ -69,26 +68,24 @@ pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, expr: &Expr<'tcx>, msrv: &Msrv fn is_child_of_cast(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool { let map = cx.tcx.hir(); - if_chain! { - if let Some(parent_id) = map.opt_parent_id(expr.hir_id); - if let Some(parent) = map.find(parent_id); - then { - let expr = match parent { - Node::Block(block) => { - if let Some(parent_expr) = block.expr { - parent_expr - } else { - return false; - } - }, - Node::Expr(expr) => expr, - _ => return false, - }; + if let Some(parent_id) = map.opt_parent_id(expr.hir_id) + && let Some(parent) = cx.tcx.opt_hir_node(parent_id) + { + let expr = match parent { + Node::Block(block) => { + if let Some(parent_expr) = block.expr { + parent_expr + } else { + return false; + } + }, + Node::Expr(expr) => expr, + _ => return false, + }; - matches!(expr.kind, ExprKind::Cast(..)) - } else { - false - } + matches!(expr.kind, ExprKind::Cast(..)) + } else { + false } } diff --git a/src/tools/clippy/clippy_lints/src/casts/cast_slice_from_raw_parts.rs b/src/tools/clippy/clippy_lints/src/casts/cast_slice_from_raw_parts.rs index badadf2c9..3db1e3e6d 100644 --- a/src/tools/clippy/clippy_lints/src/casts/cast_slice_from_raw_parts.rs +++ b/src/tools/clippy/clippy_lints/src/casts/cast_slice_from_raw_parts.rs @@ -1,7 +1,6 @@ use clippy_config::msrvs::{self, Msrv}; use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet_with_context; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::def_id::DefId; use rustc_hir::{Expr, ExprKind}; @@ -25,34 +24,32 @@ fn raw_parts_kind(cx: &LateContext<'_>, did: DefId) -> Option<RawPartsKind> { } pub(super) fn check(cx: &LateContext<'_>, expr: &Expr<'_>, cast_expr: &Expr<'_>, cast_to: Ty<'_>, msrv: &Msrv) { - if_chain! { - if msrv.meets(msrvs::PTR_SLICE_RAW_PARTS); - if let ty::RawPtr(ptrty) = cast_to.kind(); - if let ty::Slice(_) = ptrty.ty.kind(); - if let ExprKind::Call(fun, [ptr_arg, len_arg]) = cast_expr.peel_blocks().kind; - if let ExprKind::Path(ref qpath) = fun.kind; - if let Some(fun_def_id) = cx.qpath_res(qpath, fun.hir_id).opt_def_id(); - if let Some(rpk) = raw_parts_kind(cx, fun_def_id); - let ctxt = expr.span.ctxt(); - if cast_expr.span.ctxt() == ctxt; - then { - let func = match rpk { - RawPartsKind::Immutable => "from_raw_parts", - RawPartsKind::Mutable => "from_raw_parts_mut" - }; - let span = expr.span; - let mut applicability = Applicability::MachineApplicable; - let ptr = snippet_with_context(cx, ptr_arg.span, ctxt, "ptr", &mut applicability).0; - let len = snippet_with_context(cx, len_arg.span, ctxt, "len", &mut applicability).0; - span_lint_and_sugg( - cx, - CAST_SLICE_FROM_RAW_PARTS, - span, - &format!("casting the result of `{func}` to {cast_to}"), - "replace with", - format!("core::ptr::slice_{func}({ptr}, {len})"), - applicability - ); - } + if msrv.meets(msrvs::PTR_SLICE_RAW_PARTS) + && let ty::RawPtr(ptrty) = cast_to.kind() + && let ty::Slice(_) = ptrty.ty.kind() + && let ExprKind::Call(fun, [ptr_arg, len_arg]) = cast_expr.peel_blocks().kind + && let ExprKind::Path(ref qpath) = fun.kind + && let Some(fun_def_id) = cx.qpath_res(qpath, fun.hir_id).opt_def_id() + && let Some(rpk) = raw_parts_kind(cx, fun_def_id) + && let ctxt = expr.span.ctxt() + && cast_expr.span.ctxt() == ctxt + { + let func = match rpk { + RawPartsKind::Immutable => "from_raw_parts", + RawPartsKind::Mutable => "from_raw_parts_mut", + }; + let span = expr.span; + let mut applicability = Applicability::MachineApplicable; + let ptr = snippet_with_context(cx, ptr_arg.span, ctxt, "ptr", &mut applicability).0; + let len = snippet_with_context(cx, len_arg.span, ctxt, "len", &mut applicability).0; + span_lint_and_sugg( + cx, + CAST_SLICE_FROM_RAW_PARTS, + span, + &format!("casting the result of `{func}` to {cast_to}"), + "replace with", + format!("core::ptr::slice_{func}({ptr}, {len})"), + applicability, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/casts/char_lit_as_u8.rs b/src/tools/clippy/clippy_lints/src/casts/char_lit_as_u8.rs index 82e07c98a..a7d3868f7 100644 --- a/src/tools/clippy/clippy_lints/src/casts/char_lit_as_u8.rs +++ b/src/tools/clippy/clippy_lints/src/casts/char_lit_as_u8.rs @@ -1,6 +1,5 @@ use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::source::snippet_with_applicability; -use if_chain::if_chain; use rustc_ast::LitKind; use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind}; @@ -10,32 +9,31 @@ use rustc_middle::ty::{self, UintTy}; use super::CHAR_LIT_AS_U8; pub(super) fn check(cx: &LateContext<'_>, expr: &Expr<'_>) { - if_chain! { - if let ExprKind::Cast(e, _) = &expr.kind; - if let ExprKind::Lit(l) = &e.kind; - if let LitKind::Char(c) = l.node; - if ty::Uint(UintTy::U8) == *cx.typeck_results().expr_ty(expr).kind(); - then { - let mut applicability = Applicability::MachineApplicable; - let snippet = snippet_with_applicability(cx, e.span, "'x'", &mut applicability); + if let ExprKind::Cast(e, _) = &expr.kind + && let ExprKind::Lit(l) = &e.kind + && let LitKind::Char(c) = l.node + && ty::Uint(UintTy::U8) == *cx.typeck_results().expr_ty(expr).kind() + { + let mut applicability = Applicability::MachineApplicable; + let snippet = snippet_with_applicability(cx, e.span, "'x'", &mut applicability); - span_lint_and_then( - cx, - CHAR_LIT_AS_U8, - expr.span, - "casting a character literal to `u8` truncates", - |diag| { - diag.note("`char` is four bytes wide, but `u8` is a single byte"); + span_lint_and_then( + cx, + CHAR_LIT_AS_U8, + expr.span, + "casting a character literal to `u8` truncates", + |diag| { + diag.note("`char` is four bytes wide, but `u8` is a single byte"); - if c.is_ascii() { - diag.span_suggestion( - expr.span, - "use a byte literal instead", - format!("b{snippet}"), - applicability, - ); - } - }); - } + if c.is_ascii() { + diag.span_suggestion( + expr.span, + "use a byte literal instead", + format!("b{snippet}"), + applicability, + ); + } + }, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/casts/mod.rs b/src/tools/clippy/clippy_lints/src/casts/mod.rs index 49a90a2f3..e05b8f66d 100644 --- a/src/tools/clippy/clippy_lints/src/casts/mod.rs +++ b/src/tools/clippy/clippy_lints/src/casts/mod.rs @@ -27,7 +27,7 @@ use clippy_utils::is_hir_ty_cfg_dependant; use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/casts/ptr_as_ptr.rs b/src/tools/clippy/clippy_lints/src/casts/ptr_as_ptr.rs index 0c555c1ac..35e36e9ef 100644 --- a/src/tools/clippy/clippy_lints/src/casts/ptr_as_ptr.rs +++ b/src/tools/clippy/clippy_lints/src/casts/ptr_as_ptr.rs @@ -3,12 +3,29 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet_with_applicability; use clippy_utils::sugg::Sugg; use rustc_errors::Applicability; -use rustc_hir::{Expr, ExprKind, Mutability, TyKind}; +use rustc_hir::{Expr, ExprKind, Mutability, QPath, TyKind}; +use rustc_hir_pretty::qpath_to_string; use rustc_lint::LateContext; use rustc_middle::ty::{self, TypeAndMut}; +use rustc_span::sym; use super::PTR_AS_PTR; +enum OmitFollowedCastReason<'a> { + None, + Null(&'a QPath<'a>), + NullMut(&'a QPath<'a>), +} + +impl OmitFollowedCastReason<'_> { + fn corresponding_item(&self) -> Option<&QPath<'_>> { + match self { + OmitFollowedCastReason::None => None, + OmitFollowedCastReason::Null(x) | OmitFollowedCastReason::NullMut(x) => Some(*x), + } + } +} + pub(super) fn check(cx: &LateContext<'_>, expr: &Expr<'_>, msrv: &Msrv) { if !msrv.meets(msrvs::POINTER_CAST) { return; @@ -25,7 +42,6 @@ pub(super) fn check(cx: &LateContext<'_>, expr: &Expr<'_>, msrv: &Msrv) { && to_pointee_ty.is_sized(cx.tcx, cx.param_env) { let mut app = Applicability::MachineApplicable; - let cast_expr_sugg = Sugg::hir_with_applicability(cx, cast_expr, "_", &mut app); let turbofish = match &cast_to_hir_ty.kind { TyKind::Infer => String::new(), TyKind::Ptr(mut_ty) => { @@ -41,13 +57,44 @@ pub(super) fn check(cx: &LateContext<'_>, expr: &Expr<'_>, msrv: &Msrv) { _ => return, }; + // following `cast` does not compile because it fails to infer what type is expected + // as type argument to `std::ptr::ptr_null` or `std::ptr::ptr_null_mut`, so + // we omit following `cast`: + let omit_cast = if let ExprKind::Call(func, []) = cast_expr.kind + && let ExprKind::Path(ref qpath @ QPath::Resolved(None, path)) = func.kind + { + let method_defid = path.res.def_id(); + if cx.tcx.is_diagnostic_item(sym::ptr_null, method_defid) { + OmitFollowedCastReason::Null(qpath) + } else if cx.tcx.is_diagnostic_item(sym::ptr_null_mut, method_defid) { + OmitFollowedCastReason::NullMut(qpath) + } else { + OmitFollowedCastReason::None + } + } else { + OmitFollowedCastReason::None + }; + + let (help, final_suggestion) = if let Some(method) = omit_cast.corresponding_item() { + // don't force absolute path + let method = qpath_to_string(method); + ("try call directly", format!("{method}{turbofish}()")) + } else { + let cast_expr_sugg = Sugg::hir_with_applicability(cx, cast_expr, "_", &mut app); + + ( + "try `pointer::cast`, a safer alternative", + format!("{}.cast{turbofish}()", cast_expr_sugg.maybe_par()), + ) + }; + span_lint_and_sugg( cx, PTR_AS_PTR, expr.span, "`as` casting between raw pointers without changing its mutability", - "try `pointer::cast`, a safer alternative", - format!("{}.cast{turbofish}()", cast_expr_sugg.maybe_par()), + help, + final_suggestion, app, ); } diff --git a/src/tools/clippy/clippy_lints/src/casts/ptr_cast_constness.rs b/src/tools/clippy/clippy_lints/src/casts/ptr_cast_constness.rs index 0172e9336..ff069860a 100644 --- a/src/tools/clippy/clippy_lints/src/casts/ptr_cast_constness.rs +++ b/src/tools/clippy/clippy_lints/src/casts/ptr_cast_constness.rs @@ -1,7 +1,6 @@ use clippy_config::msrvs::{self, Msrv}; use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::sugg::Sugg; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{Expr, Mutability}; use rustc_lint::LateContext; @@ -17,29 +16,35 @@ pub(super) fn check<'tcx>( cast_to: Ty<'tcx>, msrv: &Msrv, ) { - if_chain! { - if msrv.meets(msrvs::POINTER_CAST_CONSTNESS); - if let ty::RawPtr(TypeAndMut { mutbl: from_mutbl, ty: from_ty }) = cast_from.kind(); - if let ty::RawPtr(TypeAndMut { mutbl: to_mutbl, ty: to_ty }) = cast_to.kind(); - if matches!((from_mutbl, to_mutbl), - (Mutability::Not, Mutability::Mut) | (Mutability::Mut, Mutability::Not)); - if from_ty == to_ty; - then { - let sugg = Sugg::hir(cx, cast_expr, "_"); - let constness = match *to_mutbl { - Mutability::Not => "const", - Mutability::Mut => "mut", - }; + if msrv.meets(msrvs::POINTER_CAST_CONSTNESS) + && let ty::RawPtr(TypeAndMut { + mutbl: from_mutbl, + ty: from_ty, + }) = cast_from.kind() + && let ty::RawPtr(TypeAndMut { + mutbl: to_mutbl, + ty: to_ty, + }) = cast_to.kind() + && matches!( + (from_mutbl, to_mutbl), + (Mutability::Not, Mutability::Mut) | (Mutability::Mut, Mutability::Not) + ) + && from_ty == to_ty + { + let sugg = Sugg::hir(cx, cast_expr, "_"); + let constness = match *to_mutbl { + Mutability::Not => "const", + Mutability::Mut => "mut", + }; - span_lint_and_sugg( - cx, - PTR_CAST_CONSTNESS, - expr.span, - "`as` casting between raw pointers while changing only its constness", - &format!("try `pointer::cast_{constness}`, a safer alternative"), - format!("{}.cast_{constness}()", sugg.maybe_par()), - Applicability::MachineApplicable, - ); - } + span_lint_and_sugg( + cx, + PTR_CAST_CONSTNESS, + expr.span, + "`as` casting between raw pointers while changing only its constness", + &format!("try `pointer::cast_{constness}`, a safer alternative"), + format!("{}.cast_{constness}()", sugg.maybe_par()), + Applicability::MachineApplicable, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/casts/unnecessary_cast.rs b/src/tools/clippy/clippy_lints/src/casts/unnecessary_cast.rs index 61bfce07e..849920bb7 100644 --- a/src/tools/clippy/clippy_lints/src/casts/unnecessary_cast.rs +++ b/src/tools/clippy/clippy_lints/src/casts/unnecessary_cast.rs @@ -3,7 +3,6 @@ use clippy_utils::numeric_literal::NumericLiteral; use clippy_utils::source::snippet_opt; use clippy_utils::visitors::{for_each_expr, Visitable}; use clippy_utils::{get_parent_expr, get_parent_node, is_hir_ty_cfg_dependant, is_ty_alias, path_to_local}; -use if_chain::if_chain; use rustc_ast::{LitFloatType, LitIntType, LitKind}; use rustc_errors::Applicability; use rustc_hir::def::{DefKind, Res}; @@ -25,40 +24,40 @@ pub(super) fn check<'tcx>( ) -> bool { let cast_str = snippet_opt(cx, cast_expr.span).unwrap_or_default(); - if_chain! { - if let ty::RawPtr(..) = cast_from.kind(); + if let ty::RawPtr(..) = cast_from.kind() // check both mutability and type are the same - if cast_from.kind() == cast_to.kind(); - if let ExprKind::Cast(_, cast_to_hir) = expr.kind; + && cast_from.kind() == cast_to.kind() + && let ExprKind::Cast(_, cast_to_hir) = expr.kind // Ignore casts to e.g. type aliases and infer types // - p as pointer_alias // - p as _ - if let TyKind::Ptr(to_pointee) = cast_to_hir.kind; - then { - match to_pointee.ty.kind { - // Ignore casts to pointers that are aliases or cfg dependant, e.g. - // - p as *const std::ffi::c_char (alias) - // - p as *const std::os::raw::c_char (cfg dependant) - TyKind::Path(qpath) => { - if is_ty_alias(&qpath) || is_hir_ty_cfg_dependant(cx, to_pointee.ty) { - return false; - } - }, - // Ignore `p as *const _` - TyKind::Infer => return false, - _ => {}, - } - - span_lint_and_sugg( - cx, - UNNECESSARY_CAST, - expr.span, - &format!("casting raw pointers to the same type and constness is unnecessary (`{cast_from}` -> `{cast_to}`)"), - "try", - cast_str.clone(), - Applicability::MaybeIncorrect, - ); + && let TyKind::Ptr(to_pointee) = cast_to_hir.kind + { + match to_pointee.ty.kind { + // Ignore casts to pointers that are aliases or cfg dependant, e.g. + // - p as *const std::ffi::c_char (alias) + // - p as *const std::os::raw::c_char (cfg dependant) + TyKind::Path(qpath) => { + if is_ty_alias(&qpath) || is_hir_ty_cfg_dependant(cx, to_pointee.ty) { + return false; + } + }, + // Ignore `p as *const _` + TyKind::Infer => return false, + _ => {}, } + + span_lint_and_sugg( + cx, + UNNECESSARY_CAST, + expr.span, + &format!( + "casting raw pointers to the same type and constness is unnecessary (`{cast_from}` -> `{cast_to}`)" + ), + "try", + cast_str.clone(), + Applicability::MaybeIncorrect, + ); } // skip cast of local that is a type alias @@ -86,14 +85,12 @@ pub(super) fn check<'tcx>( } // skip cast to non-primitive type - if_chain! { - if let ExprKind::Cast(_, cast_to) = expr.kind; - if let TyKind::Path(QPath::Resolved(_, path)) = &cast_to.kind; - if let Res::PrimTy(_) = path.res; - then {} - else { - return false; - } + if let ExprKind::Cast(_, cast_to) = expr.kind + && let TyKind::Path(QPath::Resolved(_, path)) = &cast_to.kind + && let Res::PrimTy(_) = path.res + { + } else { + return false; } // skip cast of fn call that returns type alias @@ -106,18 +103,19 @@ pub(super) fn check<'tcx>( if let Some(lit) = get_numeric_literal(cast_expr) { let literal_str = &cast_str; - if_chain! { - if let LitKind::Int(n, _) = lit.node; - if let Some(src) = snippet_opt(cx, cast_expr.span); - if cast_to.is_floating_point(); - if let Some(num_lit) = NumericLiteral::from_lit_kind(&src, &lit.node); - let from_nbits = 128 - n.leading_zeros(); - let to_nbits = fp_ty_mantissa_nbits(cast_to); - if from_nbits != 0 && to_nbits != 0 && from_nbits <= to_nbits && num_lit.is_decimal(); - then { - lint_unnecessary_cast(cx, expr, num_lit.integer, cast_from, cast_to); - return true - } + if let LitKind::Int(n, _) = lit.node + && let Some(src) = snippet_opt(cx, cast_expr.span) + && cast_to.is_floating_point() + && let Some(num_lit) = NumericLiteral::from_lit_kind(&src, &lit.node) + && let from_nbits = 128 - n.leading_zeros() + && let to_nbits = fp_ty_mantissa_nbits(cast_to) + && from_nbits != 0 + && to_nbits != 0 + && from_nbits <= to_nbits + && num_lit.is_decimal() + { + lint_unnecessary_cast(cx, expr, num_lit.integer, cast_from, cast_to); + return true; } match lit.node { diff --git a/src/tools/clippy/clippy_lints/src/checked_conversions.rs b/src/tools/clippy/clippy_lints/src/checked_conversions.rs index d31c2268a..92810ea2a 100644 --- a/src/tools/clippy/clippy_lints/src/checked_conversions.rs +++ b/src/tools/clippy/clippy_lints/src/checked_conversions.rs @@ -4,12 +4,11 @@ use clippy_config::msrvs::{self, Msrv}; use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet_with_applicability; use clippy_utils::{in_constant, is_integer_literal, SpanlessEq}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{BinOp, BinOpKind, Expr, ExprKind, QPath, TyKind}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; declare_clippy_lint! { /// ### What it does @@ -55,20 +54,17 @@ impl<'tcx> LateLintPass<'tcx> for CheckedConversions { return; } - let result = if_chain! { - if !in_constant(cx, item.hir_id); - if !in_external_macro(cx.sess(), item.span); - if let ExprKind::Binary(op, left, right) = &item.kind; - - then { - match op.node { - BinOpKind::Ge | BinOpKind::Le => single_check(item), - BinOpKind::And => double_check(cx, left, right), - _ => None, - } - } else { - None + let result = if !in_constant(cx, item.hir_id) + && !in_external_macro(cx.sess(), item.span) + && let ExprKind::Binary(op, left, right) = &item.kind + { + match op.node { + BinOpKind::Ge | BinOpKind::Le => single_check(item), + BinOpKind::And => double_check(cx, left, right), + _ => None, } + } else { + None }; if let Some(cv) = result { @@ -193,16 +189,13 @@ impl ConversionType { /// Check for `expr <= (to_type::MAX as from_type)` fn check_upper_bound<'tcx>(expr: &'tcx Expr<'tcx>) -> Option<Conversion<'tcx>> { - if_chain! { - if let ExprKind::Binary(ref op, left, right) = &expr.kind; - if let Some((candidate, check)) = normalize_le_ge(op, left, right); - if let Some((from, to)) = get_types_from_cast(check, INTS, "max_value", "MAX"); - - then { - Conversion::try_new(candidate, from, to) - } else { - None - } + if let ExprKind::Binary(ref op, left, right) = &expr.kind + && let Some((candidate, check)) = normalize_le_ge(op, left, right) + && let Some((from, to)) = get_types_from_cast(check, INTS, "max_value", "MAX") + { + Conversion::try_new(candidate, from, to) + } else { + None } } @@ -243,33 +236,27 @@ fn get_types_from_cast<'a>( ) -> Option<(&'a str, &'a str)> { // `to_type::max_value() as from_type` // or `to_type::MAX as from_type` - let call_from_cast: Option<(&Expr<'_>, &str)> = if_chain! { + let call_from_cast: Option<(&Expr<'_>, &str)> = if let ExprKind::Cast(limit, from_type) = &expr.kind // to_type::max_value(), from_type - if let ExprKind::Cast(limit, from_type) = &expr.kind; - if let TyKind::Path(ref from_type_path) = &from_type.kind; - if let Some(from_sym) = int_ty_to_sym(from_type_path); - - then { - Some((limit, from_sym)) - } else { - None - } + && let TyKind::Path(ref from_type_path) = &from_type.kind + && let Some(from_sym) = int_ty_to_sym(from_type_path) + { + Some((limit, from_sym)) + } else { + None }; // `from_type::from(to_type::max_value())` let limit_from: Option<(&Expr<'_>, &str)> = call_from_cast.or_else(|| { - if_chain! { + if let ExprKind::Call(from_func, [limit]) = &expr.kind // `from_type::from, to_type::max_value()` - if let ExprKind::Call(from_func, [limit]) = &expr.kind; // `from_type::from` - if let ExprKind::Path(ref path) = &from_func.kind; - if let Some(from_sym) = get_implementing_type(path, INTS, "from"); - - then { - Some((limit, from_sym)) - } else { - None - } + && let ExprKind::Path(ref path) = &from_func.kind + && let Some(from_sym) = get_implementing_type(path, INTS, "from") + { + Some((limit, from_sym)) + } else { + None } }); @@ -298,31 +285,27 @@ fn get_types_from_cast<'a>( /// Gets the type which implements the called function fn get_implementing_type<'a>(path: &QPath<'_>, candidates: &'a [&str], function: &str) -> Option<&'a str> { - if_chain! { - if let QPath::TypeRelative(ty, path) = &path; - if path.ident.name.as_str() == function; - if let TyKind::Path(QPath::Resolved(None, tp)) = &ty.kind; - if let [int] = tp.segments; - then { - let name = int.ident.name.as_str(); - candidates.iter().find(|c| &name == *c).copied() - } else { - None - } + if let QPath::TypeRelative(ty, path) = &path + && path.ident.name.as_str() == function + && let TyKind::Path(QPath::Resolved(None, tp)) = &ty.kind + && let [int] = tp.segments + { + let name = int.ident.name.as_str(); + candidates.iter().find(|c| &name == *c).copied() + } else { + None } } /// Gets the type as a string, if it is a supported integer fn int_ty_to_sym<'tcx>(path: &QPath<'_>) -> Option<&'tcx str> { - if_chain! { - if let QPath::Resolved(_, path) = *path; - if let [ty] = path.segments; - then { - let name = ty.ident.name.as_str(); - INTS.iter().find(|c| &name == *c).copied() - } else { - None - } + if let QPath::Resolved(_, path) = *path + && let [ty] = path.segments + { + let name = ty.ident.name.as_str(); + INTS.iter().find(|c| &name == *c).copied() + } else { + None } } diff --git a/src/tools/clippy/clippy_lints/src/cognitive_complexity.rs b/src/tools/clippy/clippy_lints/src/cognitive_complexity.rs index 74ecaa60c..60f436dc5 100644 --- a/src/tools/clippy/clippy_lints/src/cognitive_complexity.rs +++ b/src/tools/clippy/clippy_lints/src/cognitive_complexity.rs @@ -10,7 +10,7 @@ use rustc_ast::ast::Attribute; use rustc_hir::intravisit::FnKind; use rustc_hir::{Body, Expr, ExprKind, FnDecl}; use rustc_lint::{LateContext, LateLintPass, LintContext}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::def_id::LocalDefId; use rustc_span::{sym, BytePos, Span}; diff --git a/src/tools/clippy/clippy_lints/src/collapsible_if.rs b/src/tools/clippy/clippy_lints/src/collapsible_if.rs index d21ef195d..07b02c98d 100644 --- a/src/tools/clippy/clippy_lints/src/collapsible_if.rs +++ b/src/tools/clippy/clippy_lints/src/collapsible_if.rs @@ -15,11 +15,10 @@ use clippy_utils::diagnostics::{span_lint_and_sugg, span_lint_and_then}; use clippy_utils::source::{snippet, snippet_block, snippet_block_with_applicability}; use clippy_utils::sugg::Sugg; -use if_chain::if_chain; use rustc_ast::ast; use rustc_errors::Applicability; use rustc_lint::{EarlyContext, EarlyLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::Span; declare_clippy_lint! { @@ -121,49 +120,55 @@ fn block_starts_with_comment(cx: &EarlyContext<'_>, expr: &ast::Block) -> bool { } fn check_collapsible_maybe_if_let(cx: &EarlyContext<'_>, then_span: Span, else_: &ast::Expr) { - if_chain! { - if let ast::ExprKind::Block(ref block, _) = else_.kind; - if !block_starts_with_comment(cx, block); - if let Some(else_) = expr_block(block); - if else_.attrs.is_empty(); - if !else_.span.from_expansion(); - if let ast::ExprKind::If(..) = else_.kind; - then { - // Prevent "elseif" - // Check that the "else" is followed by whitespace - let up_to_else = then_span.between(block.span); - let requires_space = if let Some(c) = snippet(cx, up_to_else, "..").chars().last() { !c.is_whitespace() } else { false }; + if let ast::ExprKind::Block(ref block, _) = else_.kind + && !block_starts_with_comment(cx, block) + && let Some(else_) = expr_block(block) + && else_.attrs.is_empty() + && !else_.span.from_expansion() + && let ast::ExprKind::If(..) = else_.kind + { + // Prevent "elseif" + // Check that the "else" is followed by whitespace + let up_to_else = then_span.between(block.span); + let requires_space = if let Some(c) = snippet(cx, up_to_else, "..").chars().last() { + !c.is_whitespace() + } else { + false + }; - let mut applicability = Applicability::MachineApplicable; - span_lint_and_sugg( - cx, - COLLAPSIBLE_ELSE_IF, - block.span, - "this `else { if .. }` block can be collapsed", - "collapse nested if block", - format!( - "{}{}", - if requires_space { " " } else { "" }, - snippet_block_with_applicability(cx, else_.span, "..", Some(block.span), &mut applicability) - ), - applicability, - ); - } + let mut applicability = Applicability::MachineApplicable; + span_lint_and_sugg( + cx, + COLLAPSIBLE_ELSE_IF, + block.span, + "this `else { if .. }` block can be collapsed", + "collapse nested if block", + format!( + "{}{}", + if requires_space { " " } else { "" }, + snippet_block_with_applicability(cx, else_.span, "..", Some(block.span), &mut applicability) + ), + applicability, + ); } } fn check_collapsible_no_if_let(cx: &EarlyContext<'_>, expr: &ast::Expr, check: &ast::Expr, then: &ast::Block) { - if_chain! { - if !block_starts_with_comment(cx, then); - if let Some(inner) = expr_block(then); - if inner.attrs.is_empty(); - if let ast::ExprKind::If(ref check_inner, ref content, None) = inner.kind; + if !block_starts_with_comment(cx, then) + && let Some(inner) = expr_block(then) + && inner.attrs.is_empty() + && let ast::ExprKind::If(ref check_inner, ref content, None) = inner.kind // Prevent triggering on `if c { if let a = b { .. } }`. - if !matches!(check_inner.kind, ast::ExprKind::Let(..)); - let ctxt = expr.span.ctxt(); - if inner.span.ctxt() == ctxt; - then { - span_lint_and_then(cx, COLLAPSIBLE_IF, expr.span, "this `if` statement can be collapsed", |diag| { + && !matches!(check_inner.kind, ast::ExprKind::Let(..)) + && let ctxt = expr.span.ctxt() + && inner.span.ctxt() == ctxt + { + span_lint_and_then( + cx, + COLLAPSIBLE_IF, + expr.span, + "this `if` statement can be collapsed", + |diag| { let mut app = Applicability::MachineApplicable; let lhs = Sugg::ast(cx, check, "..", ctxt, &mut app); let rhs = Sugg::ast(cx, check_inner, "..", ctxt, &mut app); @@ -177,8 +182,8 @@ fn check_collapsible_no_if_let(cx: &EarlyContext<'_>, expr: &ast::Expr, check: & ), app, // snippet ); - }); - } + }, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/collection_is_never_read.rs b/src/tools/clippy/clippy_lints/src/collection_is_never_read.rs index 1dfc2e251..d0c989cff 100644 --- a/src/tools/clippy/clippy_lints/src/collection_is_never_read.rs +++ b/src/tools/clippy/clippy_lints/src/collection_is_never_read.rs @@ -5,7 +5,7 @@ use clippy_utils::{get_enclosing_block, get_parent_node, path_to_local_id}; use core::ops::ControlFlow; use rustc_hir::{Block, ExprKind, HirId, LangItem, Local, Node, PatKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::symbol::sym; use rustc_span::Symbol; diff --git a/src/tools/clippy/clippy_lints/src/comparison_chain.rs b/src/tools/clippy/clippy_lints/src/comparison_chain.rs index 0fe973b49..2c23c0b4f 100644 --- a/src/tools/clippy/clippy_lints/src/comparison_chain.rs +++ b/src/tools/clippy/clippy_lints/src/comparison_chain.rs @@ -3,7 +3,7 @@ use clippy_utils::ty::implements_trait; use clippy_utils::{if_sequence, in_constant, is_else_clause, SpanlessEq}; use rustc_hir::{BinOpKind, Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/copies.rs b/src/tools/clippy/clippy_lints/src/copies.rs index e3a09636e..d91af76f5 100644 --- a/src/tools/clippy/clippy_lints/src/copies.rs +++ b/src/tools/clippy/clippy_lints/src/copies.rs @@ -13,7 +13,7 @@ use rustc_hir::def_id::DefIdSet; use rustc_hir::{intravisit, BinOpKind, Block, Expr, ExprKind, HirId, HirIdSet, Stmt, StmtKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::query::Key; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::hygiene::walk_chain; use rustc_span::source_map::SourceMap; use rustc_span::{BytePos, Span, Symbol}; @@ -117,7 +117,7 @@ declare_clippy_lint! { /// ``` #[clippy::version = "pre 1.29.0"] pub IF_SAME_THEN_ELSE, - correctness, + style, "`if` with the same `then` and `else` blocks" } diff --git a/src/tools/clippy/clippy_lints/src/copy_iterator.rs b/src/tools/clippy/clippy_lints/src/copy_iterator.rs index 5d04ad011..50fd76a3a 100644 --- a/src/tools/clippy/clippy_lints/src/copy_iterator.rs +++ b/src/tools/clippy/clippy_lints/src/copy_iterator.rs @@ -2,11 +2,9 @@ use clippy_utils::diagnostics::span_lint_and_note; use clippy_utils::ty::is_copy; use rustc_hir::{Impl, Item, ItemKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; -use if_chain::if_chain; - declare_clippy_lint! { /// ### What it does /// Checks for types that implement `Copy` as well as @@ -38,25 +36,23 @@ declare_lint_pass!(CopyIterator => [COPY_ITERATOR]); impl<'tcx> LateLintPass<'tcx> for CopyIterator { fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx Item<'_>) { - if_chain! { - if let ItemKind::Impl(Impl { - of_trait: Some(ref trait_ref), - .. - }) = item.kind; - let ty = cx.tcx.type_of(item.owner_id).instantiate_identity(); - if is_copy(cx, ty); - if let Some(trait_id) = trait_ref.trait_def_id(); - if cx.tcx.is_diagnostic_item(sym::Iterator, trait_id); - then { - span_lint_and_note( - cx, - COPY_ITERATOR, - item.span, - "you are implementing `Iterator` on a `Copy` type", - None, - "consider implementing `IntoIterator` instead", - ); - } + if let ItemKind::Impl(Impl { + of_trait: Some(ref trait_ref), + .. + }) = item.kind + && let ty = cx.tcx.type_of(item.owner_id).instantiate_identity() + && is_copy(cx, ty) + && let Some(trait_id) = trait_ref.trait_def_id() + && cx.tcx.is_diagnostic_item(sym::Iterator, trait_id) + { + span_lint_and_note( + cx, + COPY_ITERATOR, + item.span, + "you are implementing `Iterator` on a `Copy` type", + None, + "consider implementing `IntoIterator` instead", + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/crate_in_macro_def.rs b/src/tools/clippy/clippy_lints/src/crate_in_macro_def.rs index a2005638d..b1aa472aa 100644 --- a/src/tools/clippy/clippy_lints/src/crate_in_macro_def.rs +++ b/src/tools/clippy/clippy_lints/src/crate_in_macro_def.rs @@ -4,7 +4,7 @@ use rustc_ast::token::{Token, TokenKind}; use rustc_ast::tokenstream::{TokenStream, TokenTree}; use rustc_errors::Applicability; use rustc_lint::{EarlyContext, EarlyLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::symbol::sym; use rustc_span::Span; @@ -53,35 +53,31 @@ declare_lint_pass!(CrateInMacroDef => [CRATE_IN_MACRO_DEF]); impl EarlyLintPass for CrateInMacroDef { fn check_item(&mut self, cx: &EarlyContext<'_>, item: &Item) { - if_chain! { - if item.attrs.iter().any(is_macro_export); - if let ItemKind::MacroDef(macro_def) = &item.kind; - let tts = macro_def.body.tokens.clone(); - if let Some(span) = contains_unhygienic_crate_reference(&tts); - then { - span_lint_and_sugg( - cx, - CRATE_IN_MACRO_DEF, - span, - "`crate` references the macro call's crate", - "to reference the macro definition's crate, use", - String::from("$crate"), - Applicability::MachineApplicable, - ); - } + if item.attrs.iter().any(is_macro_export) + && let ItemKind::MacroDef(macro_def) = &item.kind + && let tts = macro_def.body.tokens.clone() + && let Some(span) = contains_unhygienic_crate_reference(&tts) + { + span_lint_and_sugg( + cx, + CRATE_IN_MACRO_DEF, + span, + "`crate` references the macro call's crate", + "to reference the macro definition's crate, use", + String::from("$crate"), + Applicability::MachineApplicable, + ); } } } fn is_macro_export(attr: &Attribute) -> bool { - if_chain! { - if let AttrKind::Normal(normal) = &attr.kind; - if let [segment] = normal.item.path.segments.as_slice(); - then { - segment.ident.name == sym::macro_export - } else { - false - } + if let AttrKind::Normal(normal) = &attr.kind + && let [segment] = normal.item.path.segments.as_slice() + { + segment.ident.name == sym::macro_export + } else { + false } } @@ -89,16 +85,14 @@ fn contains_unhygienic_crate_reference(tts: &TokenStream) -> Option<Span> { let mut prev_is_dollar = false; let mut cursor = tts.trees(); while let Some(curr) = cursor.next() { - if_chain! { - if !prev_is_dollar; - if let Some(span) = is_crate_keyword(curr); - if let Some(next) = cursor.look_ahead(0); - if is_token(next, &TokenKind::ModSep); - then { - return Some(span); - } + if !prev_is_dollar + && let Some(span) = is_crate_keyword(curr) + && let Some(next) = cursor.look_ahead(0) + && is_token(next, &TokenKind::ModSep) + { + return Some(span); } - if let TokenTree::Delimited(_, _, tts) = &curr { + if let TokenTree::Delimited(.., tts) = &curr { let span = contains_unhygienic_crate_reference(tts); if span.is_some() { return span; @@ -110,10 +104,18 @@ fn contains_unhygienic_crate_reference(tts: &TokenStream) -> Option<Span> { } fn is_crate_keyword(tt: &TokenTree) -> Option<Span> { - if_chain! { - if let TokenTree::Token(Token { kind: TokenKind::Ident(symbol, _), span }, _) = tt; - if symbol.as_str() == "crate"; - then { Some(*span) } else { None } + if let TokenTree::Token( + Token { + kind: TokenKind::Ident(symbol, _), + span, + }, + _, + ) = tt + && symbol.as_str() == "crate" + { + Some(*span) + } else { + None } } diff --git a/src/tools/clippy/clippy_lints/src/create_dir.rs b/src/tools/clippy/clippy_lints/src/create_dir.rs index 2bca695c4..7a3d5a070 100644 --- a/src/tools/clippy/clippy_lints/src/create_dir.rs +++ b/src/tools/clippy/clippy_lints/src/create_dir.rs @@ -1,10 +1,9 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { @@ -33,22 +32,20 @@ declare_lint_pass!(CreateDir => [CREATE_DIR]); impl LateLintPass<'_> for CreateDir { fn check_expr(&mut self, cx: &LateContext<'_>, expr: &Expr<'_>) { - if_chain! { - if let ExprKind::Call(func, [arg, ..]) = expr.kind; - if let ExprKind::Path(ref path) = func.kind; - if let Some(def_id) = cx.qpath_res(path, func.hir_id).opt_def_id(); - if cx.tcx.is_diagnostic_item(sym::fs_create_dir, def_id); - then { - span_lint_and_sugg( - cx, - CREATE_DIR, - expr.span, - "calling `std::fs::create_dir` where there may be a better way", - "consider calling `std::fs::create_dir_all` instead", - format!("create_dir_all({})", snippet(cx, arg.span, "..")), - Applicability::MaybeIncorrect, - ) - } + if let ExprKind::Call(func, [arg, ..]) = expr.kind + && let ExprKind::Path(ref path) = func.kind + && let Some(def_id) = cx.qpath_res(path, func.hir_id).opt_def_id() + && cx.tcx.is_diagnostic_item(sym::fs_create_dir, def_id) + { + span_lint_and_sugg( + cx, + CREATE_DIR, + expr.span, + "calling `std::fs::create_dir` where there may be a better way", + "consider calling `std::fs::create_dir_all` instead", + format!("create_dir_all({})", snippet(cx, arg.span, "..")), + Applicability::MaybeIncorrect, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/dbg_macro.rs b/src/tools/clippy/clippy_lints/src/dbg_macro.rs index 49452136d..9424a9103 100644 --- a/src/tools/clippy/clippy_lints/src/dbg_macro.rs +++ b/src/tools/clippy/clippy_lints/src/dbg_macro.rs @@ -5,8 +5,8 @@ use clippy_utils::{is_in_cfg_test, is_in_test_function}; use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind, Node}; use rustc_lint::{LateContext, LateLintPass, LintContext}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; -use rustc_span::{sym, BytePos, Pos, Span}; +use rustc_session::impl_lint_pass; +use rustc_span::sym; declare_clippy_lint! { /// ### What it does @@ -31,31 +31,6 @@ declare_clippy_lint! { "`dbg!` macro is intended as a debugging tool" } -/// Gets the span of the statement up to the next semicolon, if and only if the next -/// non-whitespace character actually is a semicolon. -/// E.g. -/// ```rust,ignore -/// -/// dbg!(); -/// ^^^^^^^ this span is returned -/// -/// foo!(dbg!()); -/// no span is returned -/// ``` -fn span_including_semi(cx: &LateContext<'_>, span: Span) -> Option<Span> { - let sm = cx.sess().source_map(); - let sf = sm.lookup_source_file(span.hi()); - let src = sf.src.as_ref()?.get(span.hi().to_usize()..)?; - let first_non_whitespace = src.find(|c: char| !c.is_whitespace())?; - - if src.as_bytes()[first_non_whitespace] == b';' { - let hi = span.hi() + BytePos::from_usize(first_non_whitespace + 1); - Some(span.with_hi(hi)) - } else { - None - } -} - #[derive(Copy, Clone)] pub struct DbgMacro { allow_dbg_in_tests: bool, @@ -88,10 +63,10 @@ impl LateLintPass<'_> for DbgMacro { ExprKind::Block(..) => { // If the `dbg!` macro is a "free" statement and not contained within other expressions, // remove the whole statement. - if let Some(Node::Stmt(stmt)) = cx.tcx.hir().find_parent(expr.hir_id) - && let Some(span) = span_including_semi(cx, stmt.span.source_callsite()) + if let Some(Node::Stmt(_)) = cx.tcx.hir().find_parent(expr.hir_id) + && let Some(semi_span) = cx.sess().source_map().mac_call_stmt_semi_span(macro_call.span) { - (span, String::new()) + (macro_call.span.to(semi_span), String::new()) } else { (macro_call.span, String::from("()")) } diff --git a/src/tools/clippy/clippy_lints/src/declared_lints.rs b/src/tools/clippy/clippy_lints/src/declared_lints.rs index 1a646ba38..1220eb890 100644 --- a/src/tools/clippy/clippy_lints/src/declared_lints.rs +++ b/src/tools/clippy/clippy_lints/src/declared_lints.rs @@ -10,8 +10,6 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[ #[cfg(feature = "internal")] crate::utils::internal_lints::compiler_lint_functions::COMPILER_LINT_FUNCTIONS_INFO, #[cfg(feature = "internal")] - crate::utils::internal_lints::if_chain_style::IF_CHAIN_STYLE_INFO, - #[cfg(feature = "internal")] crate::utils::internal_lints::interning_defined_symbol::INTERNING_DEFINED_SYMBOL_INFO, #[cfg(feature = "internal")] crate::utils::internal_lints::interning_defined_symbol::UNNECESSARY_SYMBOL_STR_INFO, @@ -65,7 +63,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[ crate::await_holding_invalid::AWAIT_HOLDING_INVALID_TYPE_INFO, crate::await_holding_invalid::AWAIT_HOLDING_LOCK_INFO, crate::await_holding_invalid::AWAIT_HOLDING_REFCELL_REF_INFO, - crate::blocks_in_if_conditions::BLOCKS_IN_IF_CONDITIONS_INFO, + crate::blocks_in_conditions::BLOCKS_IN_CONDITIONS_INFO, crate::bool_assert_comparison::BOOL_ASSERT_COMPARISON_INFO, crate::bool_to_int_with_if::BOOL_TO_INT_WITH_IF_INFO, crate::booleans::NONMINIMAL_BOOL_INFO, @@ -141,6 +139,8 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[ crate::doc::MISSING_PANICS_DOC_INFO, crate::doc::MISSING_SAFETY_DOC_INFO, crate::doc::NEEDLESS_DOCTEST_MAIN_INFO, + crate::doc::SUSPICIOUS_DOC_COMMENTS_INFO, + crate::doc::TEST_ATTR_IN_DOCTEST_INFO, crate::doc::UNNECESSARY_SAFETY_DOC_INFO, crate::double_parens::DOUBLE_PARENS_INFO, crate::drop_forget_ref::DROP_NON_DROP_INFO, @@ -205,6 +205,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[ crate::if_not_else::IF_NOT_ELSE_INFO, crate::if_then_some_else_none::IF_THEN_SOME_ELSE_NONE_INFO, crate::ignored_unit_patterns::IGNORED_UNIT_PATTERNS_INFO, + crate::impl_hash_with_borrow_str_and_bytes::IMPL_HASH_BORROW_WITH_STR_AND_BYTES_INFO, crate::implicit_hasher::IMPLICIT_HASHER_INFO, crate::implicit_return::IMPLICIT_RETURN_INFO, crate::implicit_saturating_add::IMPLICIT_SATURATING_ADD_INFO, @@ -214,6 +215,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[ crate::index_refutable_slice::INDEX_REFUTABLE_SLICE_INFO, crate::indexing_slicing::INDEXING_SLICING_INFO, crate::indexing_slicing::OUT_OF_BOUNDS_INDEXING_INFO, + crate::ineffective_open_options::INEFFECTIVE_OPEN_OPTIONS_INFO, crate::infinite_iter::INFINITE_ITER_INFO, crate::infinite_iter::MAYBE_INFINITE_ITER_INFO, crate::inherent_impl::MULTIPLE_INHERENT_IMPL_INFO, @@ -232,6 +234,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[ crate::items_after_statements::ITEMS_AFTER_STATEMENTS_INFO, crate::items_after_test_module::ITEMS_AFTER_TEST_MODULE_INFO, crate::iter_not_returning_iterator::ITER_NOT_RETURNING_ITERATOR_INFO, + crate::iter_over_hash_type::ITER_OVER_HASH_TYPE_INFO, crate::iter_without_into_iter::INTO_ITER_WITHOUT_ITER_INFO, crate::iter_without_into_iter::ITER_WITHOUT_INTO_ITER_INFO, crate::large_const_arrays::LARGE_CONST_ARRAYS_INFO, @@ -263,6 +266,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[ crate::loops::EXPLICIT_INTO_ITER_LOOP_INFO, crate::loops::EXPLICIT_ITER_LOOP_INFO, crate::loops::FOR_KV_MAP_INFO, + crate::loops::INFINITE_LOOP_INFO, crate::loops::ITER_NEXT_LOOP_INFO, crate::loops::MANUAL_FIND_INFO, crate::loops::MANUAL_FLATTEN_INFO, @@ -376,6 +380,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[ crate::methods::ITER_SKIP_NEXT_INFO, crate::methods::ITER_SKIP_ZERO_INFO, crate::methods::ITER_WITH_DRAIN_INFO, + crate::methods::JOIN_ABSOLUTE_PATHS_INFO, crate::methods::MANUAL_FILTER_MAP_INFO, crate::methods::MANUAL_FIND_MAP_INFO, crate::methods::MANUAL_NEXT_BACK_INFO, @@ -403,6 +408,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[ crate::methods::OK_EXPECT_INFO, crate::methods::OPTION_AS_REF_DEREF_INFO, crate::methods::OPTION_FILTER_MAP_INFO, + crate::methods::OPTION_MAP_OR_ERR_OK_INFO, crate::methods::OPTION_MAP_OR_NONE_INFO, crate::methods::OR_FUN_CALL_INFO, crate::methods::OR_THEN_UNWRAP_INFO, @@ -594,6 +600,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[ crate::reference::DEREF_ADDROF_INFO, crate::regex::INVALID_REGEX_INFO, crate::regex::TRIVIAL_REGEX_INFO, + crate::repeat_vec_with_capacity::REPEAT_VEC_WITH_CAPACITY_INFO, crate::reserve_after_initialization::RESERVE_AFTER_INITIALIZATION_INFO, crate::return_self_not_must_use::RETURN_SELF_NOT_MUST_USE_INFO, crate::returns::LET_AND_RETURN_INFO, @@ -628,7 +635,6 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[ crate::strings::STR_TO_STRING_INFO, crate::strings::TRIM_SPLIT_WHITESPACE_INFO, crate::strlen_on_c_strings::STRLEN_ON_C_STRINGS_INFO, - crate::suspicious_doc_comments::SUSPICIOUS_DOC_COMMENTS_INFO, crate::suspicious_operation_groupings::SUSPICIOUS_OPERATION_GROUPINGS_INFO, crate::suspicious_trait_impl::SUSPICIOUS_ARITHMETIC_IMPL_INFO, crate::suspicious_trait_impl::SUSPICIOUS_OP_ASSIGN_IMPL_INFO, @@ -675,13 +681,13 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[ crate::unicode::INVISIBLE_CHARACTERS_INFO, crate::unicode::NON_ASCII_LITERAL_INFO, crate::unicode::UNICODE_NOT_NFC_INFO, + crate::uninhabited_references::UNINHABITED_REFERENCES_INFO, crate::uninit_vec::UNINIT_VEC_INFO, crate::unit_return_expecting_ord::UNIT_RETURN_EXPECTING_ORD_INFO, crate::unit_types::LET_UNIT_VALUE_INFO, crate::unit_types::UNIT_ARG_INFO, crate::unit_types::UNIT_CMP_INFO, crate::unnamed_address::FN_ADDRESS_COMPARISONS_INFO, - crate::unnamed_address::VTABLE_ADDRESS_COMPARISONS_INFO, crate::unnecessary_box_returns::UNNECESSARY_BOX_RETURNS_INFO, crate::unnecessary_map_on_constructor::UNNECESSARY_MAP_ON_CONSTRUCTOR_INFO, crate::unnecessary_owned_empty_strings::UNNECESSARY_OWNED_EMPTY_STRINGS_INFO, diff --git a/src/tools/clippy/clippy_lints/src/default.rs b/src/tools/clippy/clippy_lints/src/default.rs index c74b2b883..d8a070b78 100644 --- a/src/tools/clippy/clippy_lints/src/default.rs +++ b/src/tools/clippy/clippy_lints/src/default.rs @@ -2,7 +2,6 @@ use clippy_utils::diagnostics::{span_lint_and_note, span_lint_and_sugg}; use clippy_utils::source::snippet_with_context; use clippy_utils::ty::{has_drop, is_copy}; use clippy_utils::{any_parent_is_automatically_derived, contains_name, get_parent_expr, is_from_proc_macro}; -use if_chain::if_chain; use rustc_data_structures::fx::FxHashSet; use rustc_errors::Applicability; use rustc_hir::def::Res; @@ -10,7 +9,7 @@ use rustc_hir::{Block, Expr, ExprKind, PatKind, QPath, Stmt, StmtKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty; use rustc_middle::ty::print::with_forced_trimmed_paths; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::symbol::{Ident, Symbol}; use rustc_span::{sym, Span}; @@ -81,33 +80,31 @@ impl_lint_pass!(Default => [DEFAULT_TRAIT_ACCESS, FIELD_REASSIGN_WITH_DEFAULT]); impl<'tcx> LateLintPass<'tcx> for Default { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) { - if_chain! { - if !expr.span.from_expansion(); + if !expr.span.from_expansion() // Avoid cases already linted by `field_reassign_with_default` - if !self.reassigned_linted.contains(&expr.span); - if let ExprKind::Call(path, ..) = expr.kind; - if !any_parent_is_automatically_derived(cx.tcx, expr.hir_id); - if let ExprKind::Path(ref qpath) = path.kind; - if let Some(def_id) = cx.qpath_res(qpath, path.hir_id).opt_def_id(); - if cx.tcx.is_diagnostic_item(sym::default_fn, def_id); - if !is_update_syntax_base(cx, expr); + && !self.reassigned_linted.contains(&expr.span) + && let ExprKind::Call(path, ..) = expr.kind + && !any_parent_is_automatically_derived(cx.tcx, expr.hir_id) + && let ExprKind::Path(ref qpath) = path.kind + && let Some(def_id) = cx.qpath_res(qpath, path.hir_id).opt_def_id() + && cx.tcx.is_diagnostic_item(sym::default_fn, def_id) + && !is_update_syntax_base(cx, expr) // Detect and ignore <Foo as Default>::default() because these calls do explicitly name the type. - if let QPath::Resolved(None, _path) = qpath; - let expr_ty = cx.typeck_results().expr_ty(expr); - if let ty::Adt(def, ..) = expr_ty.kind(); - if !is_from_proc_macro(cx, expr); - then { - let replacement = with_forced_trimmed_paths!(format!("{}::default()", cx.tcx.def_path_str(def.did()))); - span_lint_and_sugg( - cx, - DEFAULT_TRAIT_ACCESS, - expr.span, - &format!("calling `{replacement}` is more clear than this expression"), - "try", - replacement, - Applicability::Unspecified, // First resolve the TODO above - ); - } + && let QPath::Resolved(None, _path) = qpath + && let expr_ty = cx.typeck_results().expr_ty(expr) + && let ty::Adt(def, ..) = expr_ty.kind() + && !is_from_proc_macro(cx, expr) + { + let replacement = with_forced_trimmed_paths!(format!("{}::default()", cx.tcx.def_path_str(def.did()))); + span_lint_and_sugg( + cx, + DEFAULT_TRAIT_ACCESS, + expr.span, + &format!("calling `{replacement}` is more clear than this expression"), + "try", + replacement, + Applicability::Unspecified, // First resolve the TODO above + ); } } @@ -124,38 +121,36 @@ impl<'tcx> LateLintPass<'tcx> for Default { // find all binding statements like `let mut _ = T::default()` where `T::default()` is the // `default` method of the `Default` trait, and store statement index in current block being // checked and the name of the bound variable - let (local, variant, binding_name, binding_type, span) = if_chain! { + let (local, variant, binding_name, binding_type, span) = if let StmtKind::Local(local) = stmt.kind // only take `let ...` statements - if let StmtKind::Local(local) = stmt.kind; - if let Some(expr) = local.init; - if !any_parent_is_automatically_derived(cx.tcx, expr.hir_id); - if !expr.span.from_expansion(); + && let Some(expr) = local.init + && !any_parent_is_automatically_derived(cx.tcx, expr.hir_id) + && !expr.span.from_expansion() // only take bindings to identifiers - if let PatKind::Binding(_, binding_id, ident, _) = local.pat.kind; + && let PatKind::Binding(_, binding_id, ident, _) = local.pat.kind // only when assigning `... = Default::default()` - if is_expr_default(expr, cx); - let binding_type = cx.typeck_results().node_type(binding_id); - if let Some(adt) = binding_type.ty_adt_def(); - if adt.is_struct(); - let variant = adt.non_enum_variant(); - if adt.did().is_local() || !variant.is_field_list_non_exhaustive(); - let module_did = cx.tcx.parent_module(stmt.hir_id); - if variant + && is_expr_default(expr, cx) + && let binding_type = cx.typeck_results().node_type(binding_id) + && let Some(adt) = binding_type.ty_adt_def() + && adt.is_struct() + && let variant = adt.non_enum_variant() + && (adt.did().is_local() || !variant.is_field_list_non_exhaustive()) + && let module_did = cx.tcx.parent_module(stmt.hir_id) + && variant .fields .iter() - .all(|field| field.vis.is_accessible_from(module_did, cx.tcx)); - let all_fields_are_copy = variant + .all(|field| field.vis.is_accessible_from(module_did, cx.tcx)) + && let all_fields_are_copy = variant .fields .iter() .all(|field| { is_copy(cx, cx.tcx.type_of(field.did).instantiate_identity()) - }); - if !has_drop(cx, binding_type) || all_fields_are_copy; - then { - (local, variant, ident.name, binding_type, expr.span) - } else { - continue; - } + }) + && (!has_drop(cx, binding_type) || all_fields_are_copy) + { + (local, variant, ident.name, binding_type, expr.span) + } else { + continue; }; let init_ctxt = local.span.ctxt(); @@ -216,21 +211,19 @@ impl<'tcx> LateLintPass<'tcx> for Default { .join(", "); // give correct suggestion if generics are involved (see #6944) - let binding_type = if_chain! { - if let ty::Adt(adt_def, args) = binding_type.kind(); - if !args.is_empty(); - then { - let adt_def_ty_name = cx.tcx.item_name(adt_def.did()); - let generic_args = args.iter().collect::<Vec<_>>(); - let tys_str = generic_args - .iter() - .map(ToString::to_string) - .collect::<Vec<_>>() - .join(", "); - format!("{adt_def_ty_name}::<{}>", &tys_str) - } else { - binding_type.to_string() - } + let binding_type = if let ty::Adt(adt_def, args) = binding_type.kind() + && !args.is_empty() + { + let adt_def_ty_name = cx.tcx.item_name(adt_def.did()); + let generic_args = args.iter().collect::<Vec<_>>(); + let tys_str = generic_args + .iter() + .map(ToString::to_string) + .collect::<Vec<_>>() + .join(", "); + format!("{adt_def_ty_name}::<{}>", &tys_str) + } else { + binding_type.to_string() }; let sugg = if ext_with_default { @@ -260,48 +253,42 @@ impl<'tcx> LateLintPass<'tcx> for Default { /// Checks if the given expression is the `default` method belonging to the `Default` trait. fn is_expr_default<'tcx>(expr: &'tcx Expr<'tcx>, cx: &LateContext<'tcx>) -> bool { - if_chain! { - if let ExprKind::Call(fn_expr, _) = &expr.kind; - if let ExprKind::Path(qpath) = &fn_expr.kind; - if let Res::Def(_, def_id) = cx.qpath_res(qpath, fn_expr.hir_id); - then { - // right hand side of assignment is `Default::default` - cx.tcx.is_diagnostic_item(sym::default_fn, def_id) - } else { - false - } + if let ExprKind::Call(fn_expr, _) = &expr.kind + && let ExprKind::Path(qpath) = &fn_expr.kind + && let Res::Def(_, def_id) = cx.qpath_res(qpath, fn_expr.hir_id) + { + // right hand side of assignment is `Default::default` + cx.tcx.is_diagnostic_item(sym::default_fn, def_id) + } else { + false } } /// Returns the reassigned field and the assigning expression (right-hand side of assign). fn field_reassigned_by_stmt<'tcx>(this: &Stmt<'tcx>, binding_name: Symbol) -> Option<(Ident, &'tcx Expr<'tcx>)> { - if_chain! { + if let StmtKind::Semi(later_expr) = this.kind // only take assignments - if let StmtKind::Semi(later_expr) = this.kind; - if let ExprKind::Assign(assign_lhs, assign_rhs, _) = later_expr.kind; + && let ExprKind::Assign(assign_lhs, assign_rhs, _) = later_expr.kind // only take assignments to fields where the left-hand side field is a field of // the same binding as the previous statement - if let ExprKind::Field(binding, field_ident) = assign_lhs.kind; - if let ExprKind::Path(QPath::Resolved(_, path)) = binding.kind; - if let Some(second_binding_name) = path.segments.last(); - if second_binding_name.ident.name == binding_name; - then { - Some((field_ident, assign_rhs)) - } else { - None - } + && let ExprKind::Field(binding, field_ident) = assign_lhs.kind + && let ExprKind::Path(QPath::Resolved(_, path)) = binding.kind + && let Some(second_binding_name) = path.segments.last() + && second_binding_name.ident.name == binding_name + { + Some((field_ident, assign_rhs)) + } else { + None } } /// Returns whether `expr` is the update syntax base: `Foo { a: 1, .. base }` fn is_update_syntax_base<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) -> bool { - if_chain! { - if let Some(parent) = get_parent_expr(cx, expr); - if let ExprKind::Struct(_, _, Some(base)) = parent.kind; - then { - base.hir_id == expr.hir_id - } else { - false - } + if let Some(parent) = get_parent_expr(cx, expr) + && let ExprKind::Struct(_, _, Some(base)) = parent.kind + { + base.hir_id == expr.hir_id + } else { + false } } diff --git a/src/tools/clippy/clippy_lints/src/default_constructed_unit_structs.rs b/src/tools/clippy/clippy_lints/src/default_constructed_unit_structs.rs index bf070432e..9ce5acfbc 100644 --- a/src/tools/clippy/clippy_lints/src/default_constructed_unit_structs.rs +++ b/src/tools/clippy/clippy_lints/src/default_constructed_unit_structs.rs @@ -6,7 +6,7 @@ use rustc_errors::Applicability; use rustc_hir as hir; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { @@ -56,32 +56,30 @@ fn is_alias(ty: hir::Ty<'_>) -> bool { impl LateLintPass<'_> for DefaultConstructedUnitStructs { fn check_expr<'tcx>(&mut self, cx: &LateContext<'tcx>, expr: &'tcx hir::Expr<'tcx>) { - if_chain!( + if let hir::ExprKind::Call(fn_expr, &[]) = expr.kind // make sure we have a call to `Default::default` - if let hir::ExprKind::Call(fn_expr, &[]) = expr.kind; - if let ExprKind::Path(ref qpath @ hir::QPath::TypeRelative(base, _)) = fn_expr.kind; + && let ExprKind::Path(ref qpath @ hir::QPath::TypeRelative(base, _)) = fn_expr.kind // make sure this isn't a type alias: // `<Foo as Bar>::Assoc` cannot be used as a constructor - if !is_alias(*base); - if let Res::Def(_, def_id) = cx.qpath_res(qpath, fn_expr.hir_id); - if cx.tcx.is_diagnostic_item(sym::default_fn, def_id); + && !is_alias(*base) + && let Res::Def(_, def_id) = cx.qpath_res(qpath, fn_expr.hir_id) + && cx.tcx.is_diagnostic_item(sym::default_fn, def_id) // make sure we have a struct with no fields (unit struct) - if let ty::Adt(def, ..) = cx.typeck_results().expr_ty(expr).kind(); - if def.is_struct(); - if let var @ ty::VariantDef { ctor: Some((hir::def::CtorKind::Const, _)), .. } = def.non_enum_variant(); - if !var.is_field_list_non_exhaustive(); - if !expr.span.from_expansion() && !qpath.span().from_expansion(); - then { - span_lint_and_sugg( - cx, - DEFAULT_CONSTRUCTED_UNIT_STRUCTS, - expr.span.with_lo(qpath.qself_span().hi()), - "use of `default` to create a unit struct", - "remove this call to `default`", - String::new(), - Applicability::MachineApplicable, - ) - } - ); + && let ty::Adt(def, ..) = cx.typeck_results().expr_ty(expr).kind() + && def.is_struct() + && let var @ ty::VariantDef { ctor: Some((hir::def::CtorKind::Const, _)), .. } = def.non_enum_variant() + && !var.is_field_list_non_exhaustive() + && !expr.span.from_expansion() && !qpath.span().from_expansion() + { + span_lint_and_sugg( + cx, + DEFAULT_CONSTRUCTED_UNIT_STRUCTS, + expr.span.with_lo(qpath.qself_span().hi()), + "use of `default` to create a unit struct", + "remove this call to `default`", + String::new(), + Applicability::MachineApplicable, + ); + }; } } diff --git a/src/tools/clippy/clippy_lints/src/default_instead_of_iter_empty.rs b/src/tools/clippy/clippy_lints/src/default_instead_of_iter_empty.rs index 553b670fd..2472e2ee7 100644 --- a/src/tools/clippy/clippy_lints/src/default_instead_of_iter_empty.rs +++ b/src/tools/clippy/clippy_lints/src/default_instead_of_iter_empty.rs @@ -4,7 +4,7 @@ use clippy_utils::source::snippet_with_context; use rustc_errors::Applicability; use rustc_hir::{def, Expr, ExprKind, GenericArg, QPath, TyKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::{sym, SyntaxContext}; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/default_numeric_fallback.rs b/src/tools/clippy/clippy_lints/src/default_numeric_fallback.rs index b296ea20f..64a924a77 100644 --- a/src/tools/clippy/clippy_lints/src/default_numeric_fallback.rs +++ b/src/tools/clippy/clippy_lints/src/default_numeric_fallback.rs @@ -1,7 +1,6 @@ use clippy_utils::diagnostics::span_lint_hir_and_then; use clippy_utils::source::snippet_opt; use clippy_utils::{get_parent_node, numeric_literal}; -use if_chain::if_chain; use rustc_ast::ast::{LitFloatType, LitIntType, LitKind}; use rustc_errors::Applicability; use rustc_hir::intravisit::{walk_expr, walk_stmt, Visitor}; @@ -9,7 +8,7 @@ use rustc_hir::{Body, Expr, ExprKind, HirId, ItemKind, Lit, Node, Stmt, StmtKind use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; use rustc_middle::ty::{self, FloatTy, IntTy, PolyFnSig, Ty}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use std::iter; declare_clippy_lint! { @@ -82,40 +81,40 @@ impl<'a, 'tcx> NumericFallbackVisitor<'a, 'tcx> { /// Check whether a passed literal has potential to cause fallback or not. fn check_lit(&self, lit: &Lit, lit_ty: Ty<'tcx>, emit_hir_id: HirId) { - if_chain! { - if !in_external_macro(self.cx.sess(), lit.span); - if matches!(self.ty_bounds.last(), Some(ExplicitTyBound(false))); - if matches!(lit.node, - LitKind::Int(_, LitIntType::Unsuffixed) | LitKind::Float(_, LitFloatType::Unsuffixed)); - then { - let (suffix, is_float) = match lit_ty.kind() { - ty::Int(IntTy::I32) => ("i32", false), - ty::Float(FloatTy::F64) => ("f64", true), - // Default numeric fallback never results in other types. - _ => return, - }; - - let src = if let Some(src) = snippet_opt(self.cx, lit.span) { - src - } else { - match lit.node { - LitKind::Int(src, _) => format!("{src}"), - LitKind::Float(src, _) => format!("{src}"), - _ => return, - } - }; - let sugg = numeric_literal::format(&src, Some(suffix), is_float); - span_lint_hir_and_then( - self.cx, - DEFAULT_NUMERIC_FALLBACK, - emit_hir_id, - lit.span, - "default numeric fallback might occur", - |diag| { - diag.span_suggestion(lit.span, "consider adding suffix", sugg, Applicability::MaybeIncorrect); - } - ); + if !in_external_macro(self.cx.sess(), lit.span) + && matches!(self.ty_bounds.last(), Some(ExplicitTyBound(false))) + && matches!( + lit.node, + LitKind::Int(_, LitIntType::Unsuffixed) | LitKind::Float(_, LitFloatType::Unsuffixed) + ) + { + let (suffix, is_float) = match lit_ty.kind() { + ty::Int(IntTy::I32) => ("i32", false), + ty::Float(FloatTy::F64) => ("f64", true), + // Default numeric fallback never results in other types. + _ => return, + }; + + let src = if let Some(src) = snippet_opt(self.cx, lit.span) { + src + } else { + match lit.node { + LitKind::Int(src, _) => format!("{src}"), + LitKind::Float(src, _) => format!("{src}"), + _ => return, } + }; + let sugg = numeric_literal::format(&src, Some(suffix), is_float); + span_lint_hir_and_then( + self.cx, + DEFAULT_NUMERIC_FALLBACK, + emit_hir_id, + lit.span, + "default numeric fallback might occur", + |diag| { + diag.span_suggestion(lit.span, "consider adding suffix", sugg, Applicability::MaybeIncorrect); + }, + ); } } } @@ -149,36 +148,33 @@ impl<'a, 'tcx> Visitor<'tcx> for NumericFallbackVisitor<'a, 'tcx> { ExprKind::Struct(_, fields, base) => { let ty = self.cx.typeck_results().expr_ty(expr); - if_chain! { - if let Some(adt_def) = ty.ty_adt_def(); - if adt_def.is_struct(); - if let Some(variant) = adt_def.variants().iter().next(); - then { - let fields_def = &variant.fields; - - // Push field type then visit each field expr. - for field in *fields { - let bound = - fields_def - .iter() - .find_map(|f_def| { - if f_def.ident(self.cx.tcx) == field.ident - { Some(self.cx.tcx.type_of(f_def.did).instantiate_identity()) } - else { None } - }); - self.ty_bounds.push(bound.into()); - self.visit_expr(field.expr); - self.ty_bounds.pop(); - } - - // Visit base with no bound. - if let Some(base) = base { - self.ty_bounds.push(ExplicitTyBound(false)); - self.visit_expr(base); - self.ty_bounds.pop(); - } - return; + if let Some(adt_def) = ty.ty_adt_def() + && adt_def.is_struct() + && let Some(variant) = adt_def.variants().iter().next() + { + let fields_def = &variant.fields; + + // Push field type then visit each field expr. + for field in *fields { + let bound = fields_def.iter().find_map(|f_def| { + if f_def.ident(self.cx.tcx) == field.ident { + Some(self.cx.tcx.type_of(f_def.did).instantiate_identity()) + } else { + None + } + }); + self.ty_bounds.push(bound.into()); + self.visit_expr(field.expr); + self.ty_bounds.pop(); + } + + // Visit base with no bound. + if let Some(base) = base { + self.ty_bounds.push(ExplicitTyBound(false)); + self.visit_expr(base); + self.ty_bounds.pop(); } + return; } }, diff --git a/src/tools/clippy/clippy_lints/src/default_union_representation.rs b/src/tools/clippy/clippy_lints/src/default_union_representation.rs index 8c6749a95..db01ff2cd 100644 --- a/src/tools/clippy/clippy_lints/src/default_union_representation.rs +++ b/src/tools/clippy/clippy_lints/src/default_union_representation.rs @@ -3,7 +3,7 @@ use rustc_hir::{HirId, Item, ItemKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::layout::LayoutOf; use rustc_middle::ty::{self, FieldDef, GenericArg, List}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/dereference.rs b/src/tools/clippy/clippy_lints/src/dereference.rs index 6c109a51f..aaef163ad 100644 --- a/src/tools/clippy/clippy_lints/src/dereference.rs +++ b/src/tools/clippy/clippy_lints/src/dereference.rs @@ -1,10 +1,11 @@ use clippy_utils::diagnostics::{span_lint_and_sugg, span_lint_hir_and_then}; use clippy_utils::source::{snippet_with_applicability, snippet_with_context}; use clippy_utils::sugg::has_enclosing_paren; -use clippy_utils::ty::{implements_trait, peel_mid_ty_refs}; +use clippy_utils::ty::{implements_trait, is_manually_drop, peel_mid_ty_refs}; use clippy_utils::{ expr_use_ctxt, get_parent_expr, get_parent_node, is_lint_allowed, path_to_local, DefinedTy, ExprUseNode, }; +use core::mem; use rustc_ast::util::parser::{PREC_POSTFIX, PREC_PREFIX}; use rustc_data_structures::fx::FxIndexMap; use rustc_errors::Applicability; @@ -16,7 +17,7 @@ use rustc_hir::{ use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::adjustment::{Adjust, Adjustment, AutoBorrow, AutoBorrowMutability}; use rustc_middle::ty::{self, ParamEnv, Ty, TyCtxt, TypeVisitableExt, TypeckResults}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::symbol::sym; use rustc_span::{Span, Symbol}; @@ -170,9 +171,7 @@ pub struct Dereferencing<'tcx> { #[derive(Debug)] struct StateData<'tcx> { - /// Span of the top level expression - span: Span, - hir_id: HirId, + first_expr: &'tcx Expr<'tcx>, adjusted_ty: Ty<'tcx>, } @@ -198,6 +197,7 @@ enum State { }, ExplicitDerefField { name: Symbol, + derefs_manually_drop: bool, }, Reborrow { mutability: Mutability, @@ -242,7 +242,7 @@ impl<'tcx> LateLintPass<'tcx> for Dereferencing<'tcx> { // Stop processing sub expressions when a macro call is seen if expr.span.from_expansion() { if let Some((state, data)) = self.state.take() { - report(cx, expr, state, data); + report(cx, expr, state, data, cx.typeck_results()); } return; } @@ -251,7 +251,7 @@ impl<'tcx> LateLintPass<'tcx> for Dereferencing<'tcx> { let Some((kind, sub_expr)) = try_parse_ref_op(cx.tcx, typeck, expr) else { // The whole chain of reference operations has been seen if let Some((state, data)) = self.state.take() { - report(cx, expr, state, data); + report(cx, expr, state, data, typeck); } return; }; @@ -272,14 +272,16 @@ impl<'tcx> LateLintPass<'tcx> for Dereferencing<'tcx> { (Some(use_cx), RefOp::Deref) => { let sub_ty = typeck.expr_ty(sub_expr); if let ExprUseNode::FieldAccess(name) = use_cx.node - && adjusted_ty.ty_adt_def().map_or(true, |adt| !adt.is_union()) + && !use_cx.moved_before_use && !ty_contains_field(sub_ty, name.name) { self.state = Some(( - State::ExplicitDerefField { name: name.name }, + State::ExplicitDerefField { + name: name.name, + derefs_manually_drop: is_manually_drop(sub_ty), + }, StateData { - span: expr.span, - hir_id: expr.hir_id, + first_expr: expr, adjusted_ty, }, )); @@ -293,8 +295,7 @@ impl<'tcx> LateLintPass<'tcx> for Dereferencing<'tcx> { self.state = Some(( State::ExplicitDeref { mutability: None }, StateData { - span: expr.span, - hir_id: expr.hir_id, + first_expr: expr, adjusted_ty, }, )); @@ -313,8 +314,7 @@ impl<'tcx> LateLintPass<'tcx> for Dereferencing<'tcx> { mutbl, }, StateData { - span: expr.span, - hir_id: expr.hir_id, + first_expr: expr, adjusted_ty, }, )); @@ -342,8 +342,18 @@ impl<'tcx> LateLintPass<'tcx> for Dereferencing<'tcx> { TyCoercionStability::for_defined_ty(cx, ty, use_cx.node.is_return()) }); let can_auto_borrow = match use_cx.node { - ExprUseNode::Callee => true, - ExprUseNode::FieldAccess(_) => adjusted_ty.ty_adt_def().map_or(true, |adt| !adt.is_union()), + ExprUseNode::FieldAccess(_) + if !use_cx.moved_before_use && matches!(sub_expr.kind, ExprKind::Field(..)) => + { + // `DerefMut` will not be automatically applied to `ManuallyDrop<_>` + // field expressions when the base type is a union and the parent + // expression is also a field access. + // + // e.g. `&mut x.y.z` where `x` is a union, and accessing `z` requires a + // deref through `ManuallyDrop<_>` will not compile. + !adjust_derefs_manually_drop(use_cx.adjustments, expr_ty) + }, + ExprUseNode::Callee | ExprUseNode::FieldAccess(_) => true, ExprUseNode::MethodArg(hir_id, _, 0) if !use_cx.moved_before_use => { // Check for calls to trait methods where the trait is implemented // on a reference. @@ -357,11 +367,8 @@ impl<'tcx> LateLintPass<'tcx> for Dereferencing<'tcx> { .tcx .erase_regions(use_cx.adjustments.last().map_or(expr_ty, |a| a.target)) && let ty::Ref(_, sub_ty, _) = *arg_ty.kind() - && let args = cx - .typeck_results() - .node_args_opt(hir_id) - .map(|args| &args[1..]) - .unwrap_or_default() + && let args = + typeck.node_args_opt(hir_id).map(|args| &args[1..]).unwrap_or_default() && let impl_ty = if cx.tcx.fn_sig(fn_id).instantiate_identity().skip_binder().inputs()[0] .is_ref() @@ -436,14 +443,16 @@ impl<'tcx> LateLintPass<'tcx> for Dereferencing<'tcx> { count: deref_count - required_refs, msg, stability, - for_field_access: match use_cx.node { - ExprUseNode::FieldAccess(name) => Some(name.name), - _ => None, + for_field_access: if let ExprUseNode::FieldAccess(name) = use_cx.node + && !use_cx.moved_before_use + { + Some(name.name) + } else { + None }, }), StateData { - span: expr.span, - hir_id: expr.hir_id, + first_expr: expr, adjusted_ty: use_cx.adjustments.last().map_or(expr_ty, |a| a.target), }, )); @@ -455,8 +464,7 @@ impl<'tcx> LateLintPass<'tcx> for Dereferencing<'tcx> { self.state = Some(( State::Borrow { mutability }, StateData { - span: expr.span, - hir_id: expr.hir_id, + first_expr: expr, adjusted_ty: use_cx.adjustments.last().map_or(expr_ty, |a| a.target), }, )); @@ -501,13 +509,12 @@ impl<'tcx> LateLintPass<'tcx> for Dereferencing<'tcx> { (Some((State::DerefedBorrow(state), data)), RefOp::AddrOf(mutability)) => { let adjusted_ty = data.adjusted_ty; let stability = state.stability; - report(cx, expr, State::DerefedBorrow(state), data); + report(cx, expr, State::DerefedBorrow(state), data, typeck); if stability.is_deref_stable() { self.state = Some(( State::Borrow { mutability }, StateData { - span: expr.span, - hir_id: expr.hir_id, + first_expr: expr, adjusted_ty, }, )); @@ -517,15 +524,18 @@ impl<'tcx> LateLintPass<'tcx> for Dereferencing<'tcx> { let adjusted_ty = data.adjusted_ty; let stability = state.stability; let for_field_access = state.for_field_access; - report(cx, expr, State::DerefedBorrow(state), data); + report(cx, expr, State::DerefedBorrow(state), data, typeck); if let Some(name) = for_field_access - && !ty_contains_field(typeck.expr_ty(sub_expr), name) + && let sub_expr_ty = typeck.expr_ty(sub_expr) + && !ty_contains_field(sub_expr_ty, name) { self.state = Some(( - State::ExplicitDerefField { name }, + State::ExplicitDerefField { + name, + derefs_manually_drop: is_manually_drop(sub_expr_ty), + }, StateData { - span: expr.span, - hir_id: expr.hir_id, + first_expr: expr, adjusted_ty, }, )); @@ -535,8 +545,7 @@ impl<'tcx> LateLintPass<'tcx> for Dereferencing<'tcx> { self.state = Some(( State::ExplicitDeref { mutability: None }, StateData { - span: parent.span, - hir_id: parent.hir_id, + first_expr: parent, adjusted_ty, }, )); @@ -566,13 +575,28 @@ impl<'tcx> LateLintPass<'tcx> for Dereferencing<'tcx> { (state @ Some((State::ExplicitDeref { .. }, _)), RefOp::Deref) => { self.state = state; }, - (Some((State::ExplicitDerefField { name }, data)), RefOp::Deref) - if !ty_contains_field(typeck.expr_ty(sub_expr), name) => + ( + Some(( + State::ExplicitDerefField { + name, + derefs_manually_drop, + }, + data, + )), + RefOp::Deref, + ) if let sub_expr_ty = typeck.expr_ty(sub_expr) + && !ty_contains_field(sub_expr_ty, name) => { - self.state = Some((State::ExplicitDerefField { name }, data)); + self.state = Some(( + State::ExplicitDerefField { + name, + derefs_manually_drop: derefs_manually_drop || is_manually_drop(sub_expr_ty), + }, + data, + )); }, - (Some((state, data)), _) => report(cx, expr, state, data), + (Some((state, data)), _) => report(cx, expr, state, data, typeck), } } @@ -597,26 +621,24 @@ impl<'tcx> LateLintPass<'tcx> for Dereferencing<'tcx> { return; } - if_chain! { - if !pat.span.from_expansion(); - if let ty::Ref(_, tam, _) = *cx.typeck_results().pat_ty(pat).kind(); + if !pat.span.from_expansion() + && let ty::Ref(_, tam, _) = *cx.typeck_results().pat_ty(pat).kind() // only lint immutable refs, because borrowed `&mut T` cannot be moved out - if let ty::Ref(_, _, Mutability::Not) = *tam.kind(); - then { - let mut app = Applicability::MachineApplicable; - let snip = snippet_with_context(cx, name.span, pat.span.ctxt(), "..", &mut app).0; - self.current_body = self.current_body.or(cx.enclosing_body); - self.ref_locals.insert( - id, - Some(RefPat { - always_deref: true, - spans: vec![pat.span], - app, - replacements: vec![(pat.span, snip.into())], - hir_id: pat.hir_id, - }), - ); - } + && let ty::Ref(_, _, Mutability::Not) = *tam.kind() + { + let mut app = Applicability::MachineApplicable; + let snip = snippet_with_context(cx, name.span, pat.span.ctxt(), "..", &mut app).0; + self.current_body = self.current_body.or(cx.enclosing_body); + self.ref_locals.insert( + id, + Some(RefPat { + always_deref: true, + spans: vec![pat.span], + app, + replacements: vec![(pat.span, snip.into())], + hir_id: pat.hir_id, + }), + ); } } } @@ -689,6 +711,14 @@ fn try_parse_ref_op<'tcx>( } } +// Checks if the adjustments contains a deref of `ManuallyDrop<_>` +fn adjust_derefs_manually_drop<'tcx>(adjustments: &'tcx [Adjustment<'tcx>], mut ty: Ty<'tcx>) -> bool { + adjustments.iter().any(|a| { + let ty = mem::replace(&mut ty, a.target); + matches!(a.kind, Adjust::Deref(Some(ref op)) if op.mutbl == Mutability::Mut) && is_manually_drop(ty) + }) +} + // Checks whether the type for a deref call actually changed the type, not just the mutability of // the reference. fn deref_method_same_type<'tcx>(result_ty: Ty<'tcx>, arg_ty: Ty<'tcx>) -> bool { @@ -741,7 +771,7 @@ impl TyCoercionStability { DefinedTy::Mir(ty) => Self::for_mir_ty( cx.tcx, ty.param_env, - cx.tcx.erase_late_bound_regions(ty.value), + cx.tcx.instantiate_bound_regions_with_erased(ty.value), for_return, ), } @@ -898,7 +928,13 @@ fn ty_contains_field(ty: Ty<'_>, name: Symbol) -> bool { } #[expect(clippy::needless_pass_by_value, clippy::too_many_lines)] -fn report<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>, state: State, data: StateData<'tcx>) { +fn report<'tcx>( + cx: &LateContext<'tcx>, + expr: &'tcx Expr<'_>, + state: State, + data: StateData<'tcx>, + typeck: &'tcx TypeckResults<'tcx>, +) { match state { State::DerefMethod { ty_changed_count, @@ -906,8 +942,9 @@ fn report<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>, state: State, data mutbl, } => { let mut app = Applicability::MachineApplicable; - let (expr_str, _expr_is_macro_call) = snippet_with_context(cx, expr.span, data.span.ctxt(), "..", &mut app); - let ty = cx.typeck_results().expr_ty(expr); + let (expr_str, _expr_is_macro_call) = + snippet_with_context(cx, expr.span, data.first_expr.span.ctxt(), "..", &mut app); + let ty = typeck.expr_ty(expr); let (_, ref_count) = peel_mid_ty_refs(ty); let deref_str = if ty_changed_count >= ref_count && ref_count != 0 { // a deref call changing &T -> &U requires two deref operators the first time @@ -947,7 +984,7 @@ fn report<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>, state: State, data span_lint_and_sugg( cx, EXPLICIT_DEREF_METHODS, - data.span, + data.first_expr.span, match mutbl { Mutability::Not => "explicit `deref` method call", Mutability::Mut => "explicit `deref_mut` method call", @@ -959,26 +996,34 @@ fn report<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>, state: State, data }, State::DerefedBorrow(state) => { let mut app = Applicability::MachineApplicable; - let (snip, snip_is_macro) = snippet_with_context(cx, expr.span, data.span.ctxt(), "..", &mut app); - span_lint_hir_and_then(cx, NEEDLESS_BORROW, data.hir_id, data.span, state.msg, |diag| { - let (precedence, calls_field) = match get_parent_node(cx.tcx, data.hir_id) { - Some(Node::Expr(e)) => match e.kind { - ExprKind::Call(callee, _) if callee.hir_id != data.hir_id => (0, false), - ExprKind::Call(..) => (PREC_POSTFIX, matches!(expr.kind, ExprKind::Field(..))), - _ => (e.precedence().order(), false), - }, - _ => (0, false), - }; - let sugg = if !snip_is_macro - && (calls_field || expr.precedence().order() < precedence) - && !has_enclosing_paren(&snip) - { - format!("({snip})") - } else { - snip.into() - }; - diag.span_suggestion(data.span, "change this to", sugg, app); - }); + let (snip, snip_is_macro) = + snippet_with_context(cx, expr.span, data.first_expr.span.ctxt(), "..", &mut app); + span_lint_hir_and_then( + cx, + NEEDLESS_BORROW, + data.first_expr.hir_id, + data.first_expr.span, + state.msg, + |diag| { + let (precedence, calls_field) = match get_parent_node(cx.tcx, data.first_expr.hir_id) { + Some(Node::Expr(e)) => match e.kind { + ExprKind::Call(callee, _) if callee.hir_id != data.first_expr.hir_id => (0, false), + ExprKind::Call(..) => (PREC_POSTFIX, matches!(expr.kind, ExprKind::Field(..))), + _ => (e.precedence().order(), false), + }, + _ => (0, false), + }; + let sugg = if !snip_is_macro + && (calls_field || expr.precedence().order() < precedence) + && !has_enclosing_paren(&snip) + { + format!("({snip})") + } else { + snip.into() + }; + diag.span_suggestion(data.first_expr.span, "change this to", sugg, app); + }, + ); }, State::ExplicitDeref { mutability } => { if matches!( @@ -996,7 +1041,7 @@ fn report<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>, state: State, data } let (prefix, precedence) = if let Some(mutability) = mutability - && !cx.typeck_results().expr_ty(expr).is_ref() + && !typeck.expr_ty(expr).is_ref() { let prefix = match mutability { Mutability::Not => "&", @@ -1009,53 +1054,61 @@ fn report<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>, state: State, data span_lint_hir_and_then( cx, EXPLICIT_AUTO_DEREF, - data.hir_id, - data.span, + data.first_expr.hir_id, + data.first_expr.span, "deref which would be done by auto-deref", |diag| { let mut app = Applicability::MachineApplicable; - let (snip, snip_is_macro) = snippet_with_context(cx, expr.span, data.span.ctxt(), "..", &mut app); + let (snip, snip_is_macro) = + snippet_with_context(cx, expr.span, data.first_expr.span.ctxt(), "..", &mut app); let sugg = if !snip_is_macro && expr.precedence().order() < precedence && !has_enclosing_paren(&snip) { format!("{prefix}({snip})") } else { format!("{prefix}{snip}") }; - diag.span_suggestion(data.span, "try", sugg, app); + diag.span_suggestion(data.first_expr.span, "try", sugg, app); }, ); }, - State::ExplicitDerefField { .. } => { - if matches!( - expr.kind, - ExprKind::Block(..) - | ExprKind::ConstBlock(_) - | ExprKind::If(..) - | ExprKind::Loop(..) - | ExprKind::Match(..) - ) && data.adjusted_ty.is_sized(cx.tcx, cx.param_env) - { - // Rustc bug: auto deref doesn't work on block expression when targeting sized types. - return; - } - - if let ExprKind::Field(parent_expr, _) = expr.kind - && let ty::Adt(adt, _) = cx.typeck_results().expr_ty(parent_expr).kind() - && adt.is_union() - { - // Auto deref does not apply on union field - return; - } + State::ExplicitDerefField { + derefs_manually_drop, .. + } => { + let (snip_span, needs_parens) = if matches!(expr.kind, ExprKind::Field(..)) + && (derefs_manually_drop + || adjust_derefs_manually_drop( + typeck.expr_adjustments(data.first_expr), + typeck.expr_ty(data.first_expr), + )) { + // `DerefMut` will not be automatically applied to `ManuallyDrop<_>` + // field expressions when the base type is a union and the parent + // expression is also a field access. + // + // e.g. `&mut x.y.z` where `x` is a union, and accessing `z` requires a + // deref through `ManuallyDrop<_>` will not compile. + let parent_id = cx.tcx.hir().parent_id(expr.hir_id); + if parent_id == data.first_expr.hir_id { + return; + } + (cx.tcx.hir_node(parent_id).expect_expr().span, true) + } else { + (expr.span, false) + }; span_lint_hir_and_then( cx, EXPLICIT_AUTO_DEREF, - data.hir_id, - data.span, + data.first_expr.hir_id, + data.first_expr.span, "deref which would be done by auto-deref", |diag| { let mut app = Applicability::MachineApplicable; - let snip = snippet_with_context(cx, expr.span, data.span.ctxt(), "..", &mut app).0; - diag.span_suggestion(data.span, "try", snip.into_owned(), app); + let snip = snippet_with_context(cx, snip_span, data.first_expr.span.ctxt(), "..", &mut app).0; + let sugg = if needs_parens { + format!("({snip})") + } else { + snip.into_owned() + }; + diag.span_suggestion(data.first_expr.span, "try", sugg, app); }, ); }, diff --git a/src/tools/clippy/clippy_lints/src/derivable_impls.rs b/src/tools/clippy/clippy_lints/src/derivable_impls.rs index a450becc6..6b0423200 100644 --- a/src/tools/clippy/clippy_lints/src/derivable_impls.rs +++ b/src/tools/clippy/clippy_lints/src/derivable_impls.rs @@ -10,7 +10,7 @@ use rustc_hir::{ use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::adjustment::{Adjust, PointerCoercion}; use rustc_middle::ty::{self, Adt, AdtDef, GenericArgsRef, Ty, TypeckResults}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::sym; declare_clippy_lint! { @@ -148,83 +148,65 @@ fn check_struct<'tcx>( } fn check_enum<'tcx>(cx: &LateContext<'tcx>, item: &'tcx Item<'_>, func_expr: &Expr<'_>, adt_def: AdtDef<'_>) { - if_chain! { - if let ExprKind::Path(QPath::Resolved(None, p)) = &peel_blocks(func_expr).kind; - if let Res::Def(DefKind::Ctor(CtorOf::Variant, CtorKind::Const), id) = p.res; - if let variant_id = cx.tcx.parent(id); - if let Some(variant_def) = adt_def.variants().iter().find(|v| v.def_id == variant_id); - if variant_def.fields.is_empty(); - if !variant_def.is_field_list_non_exhaustive(); - - then { - let enum_span = cx.tcx.def_span(adt_def.did()); - let indent_enum = indent_of(cx, enum_span).unwrap_or(0); - let variant_span = cx.tcx.def_span(variant_def.def_id); - let indent_variant = indent_of(cx, variant_span).unwrap_or(0); - span_lint_and_then( - cx, - DERIVABLE_IMPLS, + if let ExprKind::Path(QPath::Resolved(None, p)) = &peel_blocks(func_expr).kind + && let Res::Def(DefKind::Ctor(CtorOf::Variant, CtorKind::Const), id) = p.res + && let variant_id = cx.tcx.parent(id) + && let Some(variant_def) = adt_def.variants().iter().find(|v| v.def_id == variant_id) + && variant_def.fields.is_empty() + && !variant_def.is_field_list_non_exhaustive() + { + let enum_span = cx.tcx.def_span(adt_def.did()); + let indent_enum = indent_of(cx, enum_span).unwrap_or(0); + let variant_span = cx.tcx.def_span(variant_def.def_id); + let indent_variant = indent_of(cx, variant_span).unwrap_or(0); + span_lint_and_then(cx, DERIVABLE_IMPLS, item.span, "this `impl` can be derived", |diag| { + diag.span_suggestion_hidden( item.span, - "this `impl` can be derived", - |diag| { - diag.span_suggestion_hidden( - item.span, - "remove the manual implementation...", - String::new(), - Applicability::MachineApplicable - ); - diag.span_suggestion( - enum_span.shrink_to_lo(), - "...and instead derive it...", - format!( - "#[derive(Default)]\n{indent}", - indent = " ".repeat(indent_enum), - ), - Applicability::MachineApplicable - ); - diag.span_suggestion( - variant_span.shrink_to_lo(), - "...and mark the default variant", - format!( - "#[default]\n{indent}", - indent = " ".repeat(indent_variant), - ), - Applicability::MachineApplicable - ); - } + "remove the manual implementation...", + String::new(), + Applicability::MachineApplicable, ); - } + diag.span_suggestion( + enum_span.shrink_to_lo(), + "...and instead derive it...", + format!("#[derive(Default)]\n{indent}", indent = " ".repeat(indent_enum),), + Applicability::MachineApplicable, + ); + diag.span_suggestion( + variant_span.shrink_to_lo(), + "...and mark the default variant", + format!("#[default]\n{indent}", indent = " ".repeat(indent_variant),), + Applicability::MachineApplicable, + ); + }); } } impl<'tcx> LateLintPass<'tcx> for DerivableImpls { fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx Item<'_>) { - if_chain! { - if let ItemKind::Impl(Impl { - of_trait: Some(ref trait_ref), - items: [child], - self_ty, - .. - }) = item.kind; - if !cx.tcx.has_attr(item.owner_id, sym::automatically_derived); - if !item.span.from_expansion(); - if let Some(def_id) = trait_ref.trait_def_id(); - if cx.tcx.is_diagnostic_item(sym::Default, def_id); - if let impl_item_hir = child.id.hir_id(); - if let Some(Node::ImplItem(impl_item)) = cx.tcx.hir().find(impl_item_hir); - if let ImplItemKind::Fn(_, b) = &impl_item.kind; - if let Body { value: func_expr, .. } = cx.tcx.hir().body(*b); - if let &Adt(adt_def, args) = cx.tcx.type_of(item.owner_id).instantiate_identity().kind(); - if let attrs = cx.tcx.hir().attrs(item.hir_id()); - if !attrs.iter().any(|attr| attr.doc_str().is_some()); - if cx.tcx.hir().attrs(impl_item_hir).is_empty(); - - then { - if adt_def.is_struct() { - check_struct(cx, item, self_ty, func_expr, adt_def, args, cx.tcx.typeck_body(*b)); - } else if adt_def.is_enum() && self.msrv.meets(msrvs::DEFAULT_ENUM_ATTRIBUTE) { - check_enum(cx, item, func_expr, adt_def); - } + if let ItemKind::Impl(Impl { + of_trait: Some(ref trait_ref), + items: [child], + self_ty, + .. + }) = item.kind + && !cx.tcx.has_attr(item.owner_id, sym::automatically_derived) + && !item.span.from_expansion() + && let Some(def_id) = trait_ref.trait_def_id() + && cx.tcx.is_diagnostic_item(sym::Default, def_id) + && let impl_item_hir = child.id.hir_id() + && let Some(Node::ImplItem(impl_item)) = cx.tcx.opt_hir_node(impl_item_hir) + && let ImplItemKind::Fn(_, b) = &impl_item.kind + && let Body { value: func_expr, .. } = cx.tcx.hir().body(*b) + && let &Adt(adt_def, args) = cx.tcx.type_of(item.owner_id).instantiate_identity().kind() + && let attrs = cx.tcx.hir().attrs(item.hir_id()) + && !attrs.iter().any(|attr| attr.doc_str().is_some()) + && cx.tcx.hir().attrs(impl_item_hir).is_empty() + { + if adt_def.is_struct() { + check_struct(cx, item, self_ty, func_expr, adt_def, args, cx.tcx.typeck_body(*b)); + } else if adt_def.is_enum() && self.msrv.meets(msrvs::DEFAULT_ENUM_ATTRIBUTE) { + check_enum(cx, item, func_expr, adt_def); } } } diff --git a/src/tools/clippy/clippy_lints/src/derive.rs b/src/tools/clippy/clippy_lints/src/derive.rs index 3a331564d..d8abe4110 100644 --- a/src/tools/clippy/clippy_lints/src/derive.rs +++ b/src/tools/clippy/clippy_lints/src/derive.rs @@ -1,7 +1,6 @@ use clippy_utils::diagnostics::{span_lint_and_help, span_lint_and_note, span_lint_and_sugg, span_lint_and_then}; use clippy_utils::ty::{implements_trait, implements_trait_with_env, is_copy}; use clippy_utils::{is_lint_allowed, match_def_path, paths}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::def_id::DefId; use rustc_hir::intravisit::{walk_expr, walk_fn, walk_item, FnKind, Visitor}; @@ -15,7 +14,7 @@ use rustc_middle::ty::{ self, ClauseKind, GenericArgKind, GenericParamDefKind, ImplPolarity, ParamEnv, ToPredicate, TraitPredicate, Ty, TyCtxt, }; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::def_id::LocalDefId; use rustc_span::{sym, Span}; @@ -232,42 +231,37 @@ fn check_hash_peq<'tcx>( ty: Ty<'tcx>, hash_is_automatically_derived: bool, ) { - if_chain! { - if let Some(peq_trait_def_id) = cx.tcx.lang_items().eq_trait(); - if let Some(def_id) = trait_ref.trait_def_id(); - if cx.tcx.is_diagnostic_item(sym::Hash, def_id); - then { - // Look for the PartialEq implementations for `ty` - cx.tcx.for_each_relevant_impl(peq_trait_def_id, ty, |impl_id| { - let peq_is_automatically_derived = cx.tcx.has_attr(impl_id, sym::automatically_derived); - - if !hash_is_automatically_derived || peq_is_automatically_derived { - return; - } - - let trait_ref = cx.tcx.impl_trait_ref(impl_id).expect("must be a trait implementation"); - - // Only care about `impl PartialEq<Foo> for Foo` - // For `impl PartialEq<B> for A, input_types is [A, B] - if trait_ref.instantiate_identity().args.type_at(1) == ty { - span_lint_and_then( - cx, - DERIVED_HASH_WITH_MANUAL_EQ, - span, - "you are deriving `Hash` but have implemented `PartialEq` explicitly", - |diag| { - if let Some(local_def_id) = impl_id.as_local() { - let hir_id = cx.tcx.hir().local_def_id_to_hir_id(local_def_id); - diag.span_note( - cx.tcx.hir().span(hir_id), - "`PartialEq` implemented here" - ); - } + if let Some(peq_trait_def_id) = cx.tcx.lang_items().eq_trait() + && let Some(def_id) = trait_ref.trait_def_id() + && cx.tcx.is_diagnostic_item(sym::Hash, def_id) + { + // Look for the PartialEq implementations for `ty` + cx.tcx.for_each_relevant_impl(peq_trait_def_id, ty, |impl_id| { + let peq_is_automatically_derived = cx.tcx.has_attr(impl_id, sym::automatically_derived); + + if !hash_is_automatically_derived || peq_is_automatically_derived { + return; + } + + let trait_ref = cx.tcx.impl_trait_ref(impl_id).expect("must be a trait implementation"); + + // Only care about `impl PartialEq<Foo> for Foo` + // For `impl PartialEq<B> for A, input_types is [A, B] + if trait_ref.instantiate_identity().args.type_at(1) == ty { + span_lint_and_then( + cx, + DERIVED_HASH_WITH_MANUAL_EQ, + span, + "you are deriving `Hash` but have implemented `PartialEq` explicitly", + |diag| { + if let Some(local_def_id) = impl_id.as_local() { + let hir_id = cx.tcx.local_def_id_to_hir_id(local_def_id); + diag.span_note(cx.tcx.hir().span(hir_id), "`PartialEq` implemented here"); } - ); - } - }); - } + }, + ); + } + }); } } @@ -279,49 +273,38 @@ fn check_ord_partial_ord<'tcx>( ty: Ty<'tcx>, ord_is_automatically_derived: bool, ) { - if_chain! { - if let Some(ord_trait_def_id) = cx.tcx.get_diagnostic_item(sym::Ord); - if let Some(partial_ord_trait_def_id) = cx.tcx.lang_items().partial_ord_trait(); - if let Some(def_id) = &trait_ref.trait_def_id(); - if *def_id == ord_trait_def_id; - then { - // Look for the PartialOrd implementations for `ty` - cx.tcx.for_each_relevant_impl(partial_ord_trait_def_id, ty, |impl_id| { - let partial_ord_is_automatically_derived = cx.tcx.has_attr(impl_id, sym::automatically_derived); - - if partial_ord_is_automatically_derived == ord_is_automatically_derived { - return; - } - - let trait_ref = cx.tcx.impl_trait_ref(impl_id).expect("must be a trait implementation"); - - // Only care about `impl PartialOrd<Foo> for Foo` - // For `impl PartialOrd<B> for A, input_types is [A, B] - if trait_ref.instantiate_identity().args.type_at(1) == ty { - let mess = if partial_ord_is_automatically_derived { - "you are implementing `Ord` explicitly but have derived `PartialOrd`" - } else { - "you are deriving `Ord` but have implemented `PartialOrd` explicitly" - }; - - span_lint_and_then( - cx, - DERIVE_ORD_XOR_PARTIAL_ORD, - span, - mess, - |diag| { - if let Some(local_def_id) = impl_id.as_local() { - let hir_id = cx.tcx.hir().local_def_id_to_hir_id(local_def_id); - diag.span_note( - cx.tcx.hir().span(hir_id), - "`PartialOrd` implemented here" - ); - } - } - ); - } - }); - } + if let Some(ord_trait_def_id) = cx.tcx.get_diagnostic_item(sym::Ord) + && let Some(partial_ord_trait_def_id) = cx.tcx.lang_items().partial_ord_trait() + && let Some(def_id) = &trait_ref.trait_def_id() + && *def_id == ord_trait_def_id + { + // Look for the PartialOrd implementations for `ty` + cx.tcx.for_each_relevant_impl(partial_ord_trait_def_id, ty, |impl_id| { + let partial_ord_is_automatically_derived = cx.tcx.has_attr(impl_id, sym::automatically_derived); + + if partial_ord_is_automatically_derived == ord_is_automatically_derived { + return; + } + + let trait_ref = cx.tcx.impl_trait_ref(impl_id).expect("must be a trait implementation"); + + // Only care about `impl PartialOrd<Foo> for Foo` + // For `impl PartialOrd<B> for A, input_types is [A, B] + if trait_ref.instantiate_identity().args.type_at(1) == ty { + let mess = if partial_ord_is_automatically_derived { + "you are implementing `Ord` explicitly but have derived `PartialOrd`" + } else { + "you are deriving `Ord` but have implemented `PartialOrd` explicitly" + }; + + span_lint_and_then(cx, DERIVE_ORD_XOR_PARTIAL_ORD, span, mess, |diag| { + if let Some(local_def_id) = impl_id.as_local() { + let hir_id = cx.tcx.local_def_id_to_hir_id(local_def_id); + diag.span_note(cx.tcx.hir().span(hir_id), "`PartialOrd` implemented here"); + } + }); + } + }); } } @@ -394,27 +377,27 @@ fn check_unsafe_derive_deserialize<'tcx>( visitor.has_unsafe } - if_chain! { - if let Some(trait_def_id) = trait_ref.trait_def_id(); - if match_def_path(cx, trait_def_id, &paths::SERDE_DESERIALIZE); - if let ty::Adt(def, _) = ty.kind(); - if let Some(local_def_id) = def.did().as_local(); - let adt_hir_id = cx.tcx.hir().local_def_id_to_hir_id(local_def_id); - if !is_lint_allowed(cx, UNSAFE_DERIVE_DESERIALIZE, adt_hir_id); - if cx.tcx.inherent_impls(def.did()) + if let Some(trait_def_id) = trait_ref.trait_def_id() + && match_def_path(cx, trait_def_id, &paths::SERDE_DESERIALIZE) + && let ty::Adt(def, _) = ty.kind() + && let Some(local_def_id) = def.did().as_local() + && let adt_hir_id = cx.tcx.local_def_id_to_hir_id(local_def_id) + && !is_lint_allowed(cx, UNSAFE_DERIVE_DESERIALIZE, adt_hir_id) + && cx + .tcx + .inherent_impls(def.did()) .iter() .map(|imp_did| cx.tcx.hir().expect_item(imp_did.expect_local())) - .any(|imp| has_unsafe(cx, imp)); - then { - span_lint_and_help( - cx, - UNSAFE_DERIVE_DESERIALIZE, - item.span, - "you are deriving `serde::Deserialize` on a type that has methods using `unsafe`", - None, - "consider implementing `serde::Deserialize` manually. See https://serde.rs/impl-deserialize.html" - ); - } + .any(|imp| has_unsafe(cx, imp)) + { + span_lint_and_help( + cx, + UNSAFE_DERIVE_DESERIALIZE, + item.span, + "you are deriving `serde::Deserialize` on a type that has methods using `unsafe`", + None, + "consider implementing `serde::Deserialize` manually. See https://serde.rs/impl-deserialize.html", + ); } } @@ -431,12 +414,10 @@ impl<'tcx> Visitor<'tcx> for UnsafeVisitor<'_, 'tcx> { return; } - if_chain! { - if let Some(header) = kind.header(); - if header.unsafety == Unsafety::Unsafe; - then { - self.has_unsafe = true; - } + if let Some(header) = kind.header() + && header.unsafety == Unsafety::Unsafe + { + self.has_unsafe = true; } walk_fn(self, kind, decl, body_id, id); @@ -463,30 +444,28 @@ impl<'tcx> Visitor<'tcx> for UnsafeVisitor<'_, 'tcx> { /// Implementation of the `DERIVE_PARTIAL_EQ_WITHOUT_EQ` lint. fn check_partial_eq_without_eq<'tcx>(cx: &LateContext<'tcx>, span: Span, trait_ref: &hir::TraitRef<'_>, ty: Ty<'tcx>) { - if_chain! { - if let ty::Adt(adt, args) = ty.kind(); - if cx.tcx.visibility(adt.did()).is_public(); - if let Some(eq_trait_def_id) = cx.tcx.get_diagnostic_item(sym::Eq); - if let Some(def_id) = trait_ref.trait_def_id(); - if cx.tcx.is_diagnostic_item(sym::PartialEq, def_id); - let param_env = param_env_for_derived_eq(cx.tcx, adt.did(), eq_trait_def_id); - if !implements_trait_with_env(cx.tcx, param_env, ty, eq_trait_def_id, &[]); + if let ty::Adt(adt, args) = ty.kind() + && cx.tcx.visibility(adt.did()).is_public() + && let Some(eq_trait_def_id) = cx.tcx.get_diagnostic_item(sym::Eq) + && let Some(def_id) = trait_ref.trait_def_id() + && cx.tcx.is_diagnostic_item(sym::PartialEq, def_id) + && let param_env = param_env_for_derived_eq(cx.tcx, adt.did(), eq_trait_def_id) + && !implements_trait_with_env(cx.tcx, param_env, ty, eq_trait_def_id, adt.did(),&[]) // If all of our fields implement `Eq`, we can implement `Eq` too - if adt + && adt .all_fields() .map(|f| f.ty(cx.tcx, args)) - .all(|ty| implements_trait_with_env(cx.tcx, param_env, ty, eq_trait_def_id, &[])); - then { - span_lint_and_sugg( - cx, - DERIVE_PARTIAL_EQ_WITHOUT_EQ, - span.ctxt().outer_expn_data().call_site, - "you are deriving `PartialEq` and can implement `Eq`", - "consider deriving `Eq` as well", - "PartialEq, Eq".to_string(), - Applicability::MachineApplicable, - ) - } + .all(|ty| implements_trait_with_env(cx.tcx, param_env, ty, eq_trait_def_id, adt.did(), &[])) + { + span_lint_and_sugg( + cx, + DERIVE_PARTIAL_EQ_WITHOUT_EQ, + span.ctxt().outer_expn_data().call_site, + "you are deriving `PartialEq` and can implement `Eq`", + "consider deriving `Eq` as well", + "PartialEq, Eq".to_string(), + Applicability::MachineApplicable, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/disallowed_macros.rs b/src/tools/clippy/clippy_lints/src/disallowed_macros.rs index 324b5e079..656b3d9bf 100644 --- a/src/tools/clippy/clippy_lints/src/disallowed_macros.rs +++ b/src/tools/clippy/clippy_lints/src/disallowed_macros.rs @@ -6,7 +6,7 @@ use rustc_data_structures::fx::FxHashSet; use rustc_hir::def_id::DefIdMap; use rustc_hir::{Expr, ExprKind, ForeignItem, HirId, ImplItem, Item, Pat, Path, Stmt, TraitItem, Ty}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::{ExpnId, Span}; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/disallowed_methods.rs b/src/tools/clippy/clippy_lints/src/disallowed_methods.rs index d23aeebb5..1868d3cd3 100644 --- a/src/tools/clippy/clippy_lints/src/disallowed_methods.rs +++ b/src/tools/clippy/clippy_lints/src/disallowed_methods.rs @@ -4,7 +4,7 @@ use clippy_utils::{fn_def_id, get_parent_expr, path_def_id}; use rustc_hir::def_id::DefIdMap; use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/disallowed_names.rs b/src/tools/clippy/clippy_lints/src/disallowed_names.rs index 5e46b29b6..09dad5554 100644 --- a/src/tools/clippy/clippy_lints/src/disallowed_names.rs +++ b/src/tools/clippy/clippy_lints/src/disallowed_names.rs @@ -3,7 +3,7 @@ use clippy_utils::is_test_module_or_function; use rustc_data_structures::fx::FxHashSet; use rustc_hir::{Item, Pat, PatKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; declare_clippy_lint! { /// ### What it does @@ -31,9 +31,9 @@ pub struct DisallowedNames { } impl DisallowedNames { - pub fn new(disallow: FxHashSet<String>) -> Self { + pub fn new(disallowed_names: &[String]) -> Self { Self { - disallow, + disallow: disallowed_names.iter().cloned().collect(), test_modules_deep: 0, } } diff --git a/src/tools/clippy/clippy_lints/src/disallowed_script_idents.rs b/src/tools/clippy/clippy_lints/src/disallowed_script_idents.rs index 96a7f0e4f..d5205e65c 100644 --- a/src/tools/clippy/clippy_lints/src/disallowed_script_idents.rs +++ b/src/tools/clippy/clippy_lints/src/disallowed_script_idents.rs @@ -2,7 +2,7 @@ use clippy_utils::diagnostics::span_lint; use rustc_ast::ast; use rustc_data_structures::fx::FxHashSet; use rustc_lint::{EarlyContext, EarlyLintPass, Level, LintContext}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use unicode_script::{Script, UnicodeScript}; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/disallowed_types.rs b/src/tools/clippy/clippy_lints/src/disallowed_types.rs index 3578fb640..130f56b69 100644 --- a/src/tools/clippy/clippy_lints/src/disallowed_types.rs +++ b/src/tools/clippy/clippy_lints/src/disallowed_types.rs @@ -5,7 +5,7 @@ use rustc_hir::def::Res; use rustc_hir::def_id::DefId; use rustc_hir::{Item, ItemKind, PolyTraitRef, PrimTy, Ty, TyKind, UseKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::Span; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/doc/link_with_quotes.rs b/src/tools/clippy/clippy_lints/src/doc/link_with_quotes.rs new file mode 100644 index 000000000..01191e811 --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/doc/link_with_quotes.rs @@ -0,0 +1,20 @@ +use std::ops::Range; + +use clippy_utils::diagnostics::span_lint; +use rustc_lint::LateContext; + +use super::{Fragments, DOC_LINK_WITH_QUOTES}; + +pub fn check(cx: &LateContext<'_>, trimmed_text: &str, range: Range<usize>, fragments: Fragments<'_>) { + if ((trimmed_text.starts_with('\'') && trimmed_text.ends_with('\'')) + || (trimmed_text.starts_with('"') && trimmed_text.ends_with('"'))) + && let Some(span) = fragments.span(cx, range) + { + span_lint( + cx, + DOC_LINK_WITH_QUOTES, + span, + "possible intra-doc link using quotes instead of backticks", + ); + } +} diff --git a/src/tools/clippy/clippy_lints/src/doc/markdown.rs b/src/tools/clippy/clippy_lints/src/doc/markdown.rs new file mode 100644 index 000000000..a58219c29 --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/doc/markdown.rs @@ -0,0 +1,119 @@ +use clippy_utils::diagnostics::{span_lint, span_lint_and_then}; +use clippy_utils::source::snippet_with_applicability; +use rustc_data_structures::fx::FxHashSet; +use rustc_errors::{Applicability, SuggestionStyle}; +use rustc_lint::LateContext; +use rustc_span::{BytePos, Pos, Span}; +use url::Url; + +use crate::doc::DOC_MARKDOWN; + +pub fn check(cx: &LateContext<'_>, valid_idents: &FxHashSet<String>, text: &str, span: Span) { + for orig_word in text.split(|c: char| c.is_whitespace() || c == '\'') { + // Trim punctuation as in `some comment (see foo::bar).` + // ^^ + // Or even as in `_foo bar_` which is emphasized. Also preserve `::` as a prefix/suffix. + let trim_pattern = |c: char| !c.is_alphanumeric() && c != ':'; + let mut word = orig_word.trim_end_matches(trim_pattern); + + // If word is immediately followed by `()`, claw it back. + if let Some(tmp_word) = orig_word.get(..word.len() + 2) + && tmp_word.ends_with("()") + { + word = tmp_word; + } + + word = word.trim_start_matches(trim_pattern); + + // Remove leading or trailing single `:` which may be part of a sentence. + if word.starts_with(':') && !word.starts_with("::") { + word = word.trim_start_matches(':'); + } + if word.ends_with(':') && !word.ends_with("::") { + word = word.trim_end_matches(':'); + } + + if valid_idents.contains(word) || word.chars().all(|c| c == ':') { + continue; + } + + // Adjust for the current word + let offset = word.as_ptr() as usize - text.as_ptr() as usize; + let span = Span::new( + span.lo() + BytePos::from_usize(offset), + span.lo() + BytePos::from_usize(offset + word.len()), + span.ctxt(), + span.parent(), + ); + + check_word(cx, word, span); + } +} + +fn check_word(cx: &LateContext<'_>, word: &str, span: Span) { + /// Checks if a string is upper-camel-case, i.e., starts with an uppercase and + /// contains at least two uppercase letters (`Clippy` is ok) and one lower-case + /// letter (`NASA` is ok). + /// Plurals are also excluded (`IDs` is ok). + fn is_camel_case(s: &str) -> bool { + if s.starts_with(|c: char| c.is_ascii_digit() | c.is_ascii_lowercase()) { + return false; + } + + let s = s.strip_suffix('s').unwrap_or(s); + + s.chars().all(char::is_alphanumeric) + && s.chars().filter(|&c| c.is_uppercase()).take(2).count() > 1 + && s.chars().filter(|&c| c.is_lowercase()).take(1).count() > 0 + } + + fn has_underscore(s: &str) -> bool { + s != "_" && !s.contains("\\_") && s.contains('_') + } + + fn has_hyphen(s: &str) -> bool { + s != "-" && s.contains('-') + } + + if let Ok(url) = Url::parse(word) { + // try to get around the fact that `foo::bar` parses as a valid URL + if !url.cannot_be_a_base() { + span_lint( + cx, + DOC_MARKDOWN, + span, + "you should put bare URLs between `<`/`>` or make a proper Markdown link", + ); + + return; + } + } + + // We assume that mixed-case words are not meant to be put inside backticks. (Issue #2343) + if has_underscore(word) && has_hyphen(word) { + return; + } + + if has_underscore(word) || word.contains("::") || is_camel_case(word) || word.ends_with("()") { + let mut applicability = Applicability::MachineApplicable; + + span_lint_and_then( + cx, + DOC_MARKDOWN, + span, + "item in documentation is missing backticks", + |diag| { + let snippet = snippet_with_applicability(cx, span, "..", &mut applicability); + diag.span_suggestion_with_style( + span, + "try", + format!("`{snippet}`"), + applicability, + // always show the suggestion in a separate line, since the + // inline presentation adds another pair of backticks + SuggestionStyle::ShowAlways, + ); + }, + ); + } +} diff --git a/src/tools/clippy/clippy_lints/src/doc/missing_headers.rs b/src/tools/clippy/clippy_lints/src/doc/missing_headers.rs new file mode 100644 index 000000000..4cbfa97a8 --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/doc/missing_headers.rs @@ -0,0 +1,86 @@ +use clippy_utils::diagnostics::{span_lint, span_lint_and_note}; +use clippy_utils::ty::{implements_trait, is_type_diagnostic_item}; +use clippy_utils::{is_doc_hidden, return_ty}; +use rustc_hir::{BodyId, FnSig, OwnerId, Unsafety}; +use rustc_lint::LateContext; +use rustc_middle::ty; +use rustc_span::{sym, Span}; + +use super::{DocHeaders, MISSING_ERRORS_DOC, MISSING_PANICS_DOC, MISSING_SAFETY_DOC, UNNECESSARY_SAFETY_DOC}; + +pub fn check( + cx: &LateContext<'_>, + owner_id: OwnerId, + sig: &FnSig<'_>, + headers: DocHeaders, + body_id: Option<BodyId>, + panic_span: Option<Span>, + check_private_items: bool, +) { + if !check_private_items && !cx.effective_visibilities.is_exported(owner_id.def_id) { + return; // Private functions do not require doc comments + } + + // do not lint if any parent has `#[doc(hidden)]` attribute (#7347) + if !check_private_items + && cx + .tcx + .hir() + .parent_iter(owner_id.into()) + .any(|(id, _node)| is_doc_hidden(cx.tcx.hir().attrs(id))) + { + return; + } + + let span = cx.tcx.def_span(owner_id); + match (headers.safety, sig.header.unsafety) { + (false, Unsafety::Unsafe) => span_lint( + cx, + MISSING_SAFETY_DOC, + span, + "unsafe function's docs miss `# Safety` section", + ), + (true, Unsafety::Normal) => span_lint( + cx, + UNNECESSARY_SAFETY_DOC, + span, + "safe function's docs have unnecessary `# Safety` section", + ), + _ => (), + } + if !headers.panics && panic_span.is_some() { + span_lint_and_note( + cx, + MISSING_PANICS_DOC, + span, + "docs for function which may panic missing `# Panics` section", + panic_span, + "first possible panic found here", + ); + } + if !headers.errors { + if is_type_diagnostic_item(cx, return_ty(cx, owner_id), sym::Result) { + span_lint( + cx, + MISSING_ERRORS_DOC, + span, + "docs for function returning `Result` missing `# Errors` section", + ); + } else if let Some(body_id) = body_id + && let Some(future) = cx.tcx.lang_items().future_trait() + && let typeck = cx.tcx.typeck_body(body_id) + && let body = cx.tcx.hir().body(body_id) + && let ret_ty = typeck.expr_ty(body.value) + && implements_trait(cx, ret_ty, future, &[]) + && let ty::Coroutine(_, subs, _) = ret_ty.kind() + && is_type_diagnostic_item(cx, subs.as_coroutine().return_ty(), sym::Result) + { + span_lint( + cx, + MISSING_ERRORS_DOC, + span, + "docs for function returning `Result` missing `# Errors` section", + ); + } + } +} diff --git a/src/tools/clippy/clippy_lints/src/doc.rs b/src/tools/clippy/clippy_lints/src/doc/mod.rs index 8982fca6e..ba4527750 100644 --- a/src/tools/clippy/clippy_lints/src/doc.rs +++ b/src/tools/clippy/clippy_lints/src/doc/mod.rs @@ -1,20 +1,16 @@ use clippy_utils::attrs::is_doc_hidden; -use clippy_utils::diagnostics::{span_lint, span_lint_and_help, span_lint_and_note, span_lint_and_then}; +use clippy_utils::diagnostics::{span_lint, span_lint_and_help}; use clippy_utils::macros::{is_panic, root_macro_call_first_node}; -use clippy_utils::source::snippet_with_applicability; -use clippy_utils::ty::{implements_trait, is_type_diagnostic_item}; -use clippy_utils::{is_entrypoint_fn, method_chain_args, return_ty}; -use if_chain::if_chain; +use clippy_utils::ty::is_type_diagnostic_item; +use clippy_utils::visitors::Visitable; +use clippy_utils::{is_entrypoint_fn, method_chain_args}; use pulldown_cmark::Event::{ Code, End, FootnoteReference, HardBreak, Html, Rule, SoftBreak, Start, TaskListMarker, Text, }; use pulldown_cmark::Tag::{CodeBlock, Heading, Item, Link, Paragraph}; use pulldown_cmark::{BrokenLink, CodeBlockKind, CowStr, Options}; -use rustc_ast::ast::{Async, Attribute, Fn, FnRetTy, ItemKind}; +use rustc_ast::ast::Attribute; use rustc_data_structures::fx::FxHashSet; -use rustc_data_structures::sync::Lrc; -use rustc_errors::emitter::EmitterWriter; -use rustc_errors::{Applicability, Handler, SuggestionStyle}; use rustc_hir as hir; use rustc_hir::intravisit::{self, Visitor}; use rustc_hir::{AnonConst, Expr}; @@ -22,20 +18,21 @@ use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::hir::nested_filter; use rustc_middle::lint::in_external_macro; use rustc_middle::ty; -use rustc_parse::maybe_new_parser_from_source_str; -use rustc_parse::parser::ForceCollect; use rustc_resolve::rustdoc::{ add_doc_fragment, attrs_to_doc_fragments, main_body_opts, source_span_for_markdown_range, DocFragment, }; -use rustc_session::parse::ParseSess; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::edition::Edition; -use rustc_span::{sym, BytePos, FileName, Pos, Span}; -use rustc_span::source_map::{FilePathMapping, SourceMap}; +use rustc_span::{sym, Span}; use std::ops::Range; -use std::{io, thread}; use url::Url; +mod link_with_quotes; +mod markdown; +mod missing_headers; +mod needless_doctest_main; +mod suspicious_doc_comments; + declare_clippy_lint! { /// ### What it does /// Checks for the presence of `_`, `::` or camel-case words @@ -204,6 +201,39 @@ declare_clippy_lint! { declare_clippy_lint! { /// ### What it does + /// Checks for `#[test]` in doctests unless they are marked with + /// either `ignore`, `no_run` or `compile_fail`. + /// + /// ### Why is this bad? + /// Code in examples marked as `#[test]` will somewhat + /// surprisingly not be run by `cargo test`. If you really want + /// to show how to test stuff in an example, mark it `no_run` to + /// make the intent clear. + /// + /// ### Examples + /// ```no_run + /// /// An example of a doctest with a `main()` function + /// /// + /// /// # Examples + /// /// + /// /// ``` + /// /// #[test] + /// /// fn equality_works() { + /// /// assert_eq!(1_u8, 1); + /// /// } + /// /// ``` + /// fn test_attr_in_doctest() { + /// unimplemented!(); + /// } + /// ``` + #[clippy::version = "1.40.0"] + pub TEST_ATTR_IN_DOCTEST, + suspicious, + "presence of `#[test]` in code examples" +} + +declare_clippy_lint! { + /// ### What it does /// Detects the syntax `['foo']` in documentation comments (notice quotes instead of backticks) /// outside of code blocks /// ### Why is this bad? @@ -261,33 +291,83 @@ declare_clippy_lint! { "`pub fn` or `pub trait` with `# Safety` docs" } -#[expect(clippy::module_name_repetitions)] +declare_clippy_lint! { + /// ### What it does + /// Detects the use of outer doc comments (`///`, `/**`) followed by a bang (`!`): `///!` + /// + /// ### Why is this bad? + /// Triple-slash comments (known as "outer doc comments") apply to items that follow it. + /// An outer doc comment followed by a bang (i.e. `///!`) has no specific meaning. + /// + /// The user most likely meant to write an inner doc comment (`//!`, `/*!`), which + /// applies to the parent item (i.e. the item that the comment is contained in, + /// usually a module or crate). + /// + /// ### Known problems + /// Inner doc comments can only appear before items, so there are certain cases where the suggestion + /// made by this lint is not valid code. For example: + /// ```rs + /// fn foo() {} + /// ///! + /// fn bar() {} + /// ``` + /// This lint detects the doc comment and suggests changing it to `//!`, but an inner doc comment + /// is not valid at that position. + /// + /// ### Example + /// In this example, the doc comment is attached to the *function*, rather than the *module*. + /// ```no_run + /// pub mod util { + /// ///! This module contains utility functions. + /// + /// pub fn dummy() {} + /// } + /// ``` + /// + /// Use instead: + /// ```no_run + /// pub mod util { + /// //! This module contains utility functions. + /// + /// pub fn dummy() {} + /// } + /// ``` + #[clippy::version = "1.70.0"] + pub SUSPICIOUS_DOC_COMMENTS, + suspicious, + "suspicious usage of (outer) doc comments" +} + #[derive(Clone)] -pub struct DocMarkdown { +pub struct Documentation { valid_idents: FxHashSet<String>, in_trait_impl: bool, + check_private_items: bool, } -impl DocMarkdown { - pub fn new(valid_idents: FxHashSet<String>) -> Self { +impl Documentation { + pub fn new(valid_idents: &[String], check_private_items: bool) -> Self { Self { - valid_idents, + valid_idents: valid_idents.iter().cloned().collect(), in_trait_impl: false, + check_private_items, } } } -impl_lint_pass!(DocMarkdown => [ +impl_lint_pass!(Documentation => [ DOC_LINK_WITH_QUOTES, DOC_MARKDOWN, MISSING_SAFETY_DOC, MISSING_ERRORS_DOC, MISSING_PANICS_DOC, NEEDLESS_DOCTEST_MAIN, + TEST_ATTR_IN_DOCTEST, UNNECESSARY_SAFETY_DOC, + SUSPICIOUS_DOC_COMMENTS ]); -impl<'tcx> LateLintPass<'tcx> for DocMarkdown { +impl<'tcx> LateLintPass<'tcx> for Documentation { fn check_crate(&mut self, cx: &LateContext<'tcx>) { let attrs = cx.tcx.hir().attrs(hir::CRATE_HIR_ID); check_attrs(cx, &self.valid_idents, attrs); @@ -302,13 +382,17 @@ impl<'tcx> LateLintPass<'tcx> for DocMarkdown { hir::ItemKind::Fn(ref sig, _, body_id) => { if !(is_entrypoint_fn(cx, item.owner_id.to_def_id()) || in_external_macro(cx.tcx.sess, item.span)) { let body = cx.tcx.hir().body(body_id); - let mut fpu = FindPanicUnwrap { + + let panic_span = FindPanicUnwrap::find_span(cx, cx.tcx.typeck(item.owner_id), body.value); + missing_headers::check( cx, - typeck_results: cx.tcx.typeck(item.owner_id.def_id), - panic_span: None, - }; - fpu.visit_expr(body.value); - lint_for_missing_headers(cx, item.owner_id, sig, headers, Some(body_id), fpu.panic_span); + item.owner_id, + sig, + headers, + Some(body_id), + panic_span, + self.check_private_items, + ); } }, hir::ItemKind::Impl(impl_) => { @@ -346,7 +430,7 @@ impl<'tcx> LateLintPass<'tcx> for DocMarkdown { }; if let hir::TraitItemKind::Fn(ref sig, ..) = item.kind { if !in_external_macro(cx.tcx.sess, item.span) { - lint_for_missing_headers(cx, item.owner_id, sig, headers, None, None); + missing_headers::check(cx, item.owner_id, sig, headers, None, None, self.check_private_items); } } } @@ -361,92 +445,17 @@ impl<'tcx> LateLintPass<'tcx> for DocMarkdown { } if let hir::ImplItemKind::Fn(ref sig, body_id) = item.kind { let body = cx.tcx.hir().body(body_id); - let mut fpu = FindPanicUnwrap { - cx, - typeck_results: cx.tcx.typeck(item.owner_id.def_id), - panic_span: None, - }; - fpu.visit_expr(body.value); - lint_for_missing_headers(cx, item.owner_id, sig, headers, Some(body_id), fpu.panic_span); - } - } -} - -fn lint_for_missing_headers( - cx: &LateContext<'_>, - owner_id: hir::OwnerId, - sig: &hir::FnSig<'_>, - headers: DocHeaders, - body_id: Option<hir::BodyId>, - panic_span: Option<Span>, -) { - if !cx.effective_visibilities.is_exported(owner_id.def_id) { - return; // Private functions do not require doc comments - } - - // do not lint if any parent has `#[doc(hidden)]` attribute (#7347) - if cx - .tcx - .hir() - .parent_iter(owner_id.into()) - .any(|(id, _node)| is_doc_hidden(cx.tcx.hir().attrs(id))) - { - return; - } - let span = cx.tcx.def_span(owner_id); - match (headers.safety, sig.header.unsafety) { - (false, hir::Unsafety::Unsafe) => span_lint( - cx, - MISSING_SAFETY_DOC, - span, - "unsafe function's docs miss `# Safety` section", - ), - (true, hir::Unsafety::Normal) => span_lint( - cx, - UNNECESSARY_SAFETY_DOC, - span, - "safe function's docs have unnecessary `# Safety` section", - ), - _ => (), - } - if !headers.panics && panic_span.is_some() { - span_lint_and_note( - cx, - MISSING_PANICS_DOC, - span, - "docs for function which may panic missing `# Panics` section", - panic_span, - "first possible panic found here", - ); - } - if !headers.errors { - if is_type_diagnostic_item(cx, return_ty(cx, owner_id), sym::Result) { - span_lint( + let panic_span = FindPanicUnwrap::find_span(cx, cx.tcx.typeck(item.owner_id), body.value); + missing_headers::check( cx, - MISSING_ERRORS_DOC, - span, - "docs for function returning `Result` missing `# Errors` section", + item.owner_id, + sig, + headers, + Some(body_id), + panic_span, + self.check_private_items, ); - } else { - if_chain! { - if let Some(body_id) = body_id; - if let Some(future) = cx.tcx.lang_items().future_trait(); - let typeck = cx.tcx.typeck_body(body_id); - let body = cx.tcx.hir().body(body_id); - let ret_ty = typeck.expr_ty(body.value); - if implements_trait(cx, ret_ty, future, &[]); - if let ty::Coroutine(_, subs, _) = ret_ty.kind(); - if is_type_diagnostic_item(cx, subs.as_coroutine().return_ty(), sym::Result); - then { - span_lint( - cx, - MISSING_ERRORS_DOC, - span, - "docs for function returning `Result` missing `# Errors` section", - ); - } - } } } } @@ -470,6 +479,13 @@ struct DocHeaders { panics: bool, } +/// Does some pre-processing on raw, desugared `#[doc]` attributes such as parsing them and +/// then delegates to `check_doc`. +/// Some lints are already checked here if they can work with attributes directly and don't need +/// to work with markdown. +/// Others are checked elsewhere, e.g. in `check_doc` if they need access to markdown, or +/// back in the various late lint pass methods if they need the final doc headers, like "Safety" or +/// "Panics" sections. fn check_attrs(cx: &LateContext<'_>, valid_idents: &FxHashSet<String>, attrs: &[Attribute]) -> Option<DocHeaders> { /// We don't want the parser to choke on intra doc links. Since we don't /// actually care about rendering them, just pretend that all broken links @@ -483,6 +499,8 @@ fn check_attrs(cx: &LateContext<'_>, valid_idents: &FxHashSet<String>, attrs: &[ return None; } + suspicious_doc_comments::check(cx, attrs); + let (fragments, _) = attrs_to_doc_fragments(attrs.iter().map(|attr| (attr, None)), true); let mut doc = String::new(); for fragment in &fragments { @@ -513,6 +531,10 @@ fn check_attrs(cx: &LateContext<'_>, valid_idents: &FxHashSet<String>, attrs: &[ const RUST_CODE: &[&str] = &["rust", "no_run", "should_panic", "compile_fail"]; +/// Checks parsed documentation. +/// This walks the "events" (think sections of markdown) produced by `pulldown_cmark`, +/// so lints here will generally access that information. +/// Returns documentation headers -- whether a "Safety", "Errors", "Panic" section was found #[allow(clippy::too_many_lines)] // Only a big match statement fn check_doc<'a, Events: Iterator<Item = (pulldown_cmark::Event<'a>, Range<usize>)>>( cx: &LateContext<'_>, @@ -527,6 +549,7 @@ fn check_doc<'a, Events: Iterator<Item = (pulldown_cmark::Event<'a>, Range<usize let mut in_heading = false; let mut is_rust = false; let mut no_test = false; + let mut ignore = false; let mut edition = None; let mut ticks_unbalanced = false; let mut text_to_check: Vec<(CowStr<'_>, Range<usize>)> = Vec::new(); @@ -542,6 +565,8 @@ fn check_doc<'a, Events: Iterator<Item = (pulldown_cmark::Event<'a>, Range<usize break; } else if item == "no_test" { no_test = true; + } else if item == "no_run" || item == "compile_fail" { + ignore = true; } if let Some(stripped) = item.strip_prefix("edition") { is_rust = true; @@ -555,6 +580,7 @@ fn check_doc<'a, Events: Iterator<Item = (pulldown_cmark::Event<'a>, Range<usize End(CodeBlock(_)) => { in_code = false; is_rust = false; + ignore = false; }, Start(Link(_, url, _)) => in_link = Some(url), End(Link(..)) => in_link = None, @@ -581,7 +607,7 @@ fn check_doc<'a, Events: Iterator<Item = (pulldown_cmark::Event<'a>, Range<usize } else { for (text, range) in text_to_check { if let Some(span) = fragments.span(cx, range) { - check_text(cx, valid_idents, &text, span); + markdown::check(cx, valid_idents, &text, span); } } } @@ -608,11 +634,11 @@ fn check_doc<'a, Events: Iterator<Item = (pulldown_cmark::Event<'a>, Range<usize if in_code { if is_rust && !no_test { let edition = edition.unwrap_or_else(|| cx.tcx.sess.edition()); - check_code(cx, &text, edition, range.clone(), fragments); + needless_doctest_main::check(cx, &text, edition, range.clone(), fragments, ignore); } } else { if in_link.is_some() { - check_link_quotes(cx, trimmed_text, range.clone(), fragments); + link_with_quotes::check(cx, trimmed_text, range.clone(), fragments); } if let Some(link) = in_link.as_ref() && let Ok(url) = Url::parse(link) @@ -629,207 +655,28 @@ fn check_doc<'a, Events: Iterator<Item = (pulldown_cmark::Event<'a>, Range<usize headers } -fn check_link_quotes(cx: &LateContext<'_>, trimmed_text: &str, range: Range<usize>, fragments: Fragments<'_>) { - if trimmed_text.starts_with('\'') - && trimmed_text.ends_with('\'') - && let Some(span) = fragments.span(cx, range) - { - span_lint( - cx, - DOC_LINK_WITH_QUOTES, - span, - "possible intra-doc link using quotes instead of backticks", - ); - } -} - -fn check_code(cx: &LateContext<'_>, text: &str, edition: Edition, range: Range<usize>, fragments: Fragments<'_>) { - fn has_needless_main(code: String, edition: Edition) -> bool { - rustc_driver::catch_fatal_errors(|| { - rustc_span::create_session_globals_then(edition, || { - let filename = FileName::anon_source_code(&code); - - let sm = Lrc::new(SourceMap::new(FilePathMapping::empty())); - let fallback_bundle = - rustc_errors::fallback_fluent_bundle(rustc_driver::DEFAULT_LOCALE_RESOURCES.to_vec(), false); - let emitter = EmitterWriter::new(Box::new(io::sink()), fallback_bundle); - let handler = Handler::with_emitter(Box::new(emitter)).disable_warnings(); - let sess = ParseSess::with_span_handler(handler, sm); - - let mut parser = match maybe_new_parser_from_source_str(&sess, filename, code) { - Ok(p) => p, - Err(errs) => { - drop(errs); - return false; - }, - }; - - let mut relevant_main_found = false; - loop { - match parser.parse_item(ForceCollect::No) { - Ok(Some(item)) => match &item.kind { - ItemKind::Fn(box Fn { - sig, body: Some(block), .. - }) if item.ident.name == sym::main => { - let is_async = matches!(sig.header.asyncness, Async::Yes { .. }); - let returns_nothing = match &sig.decl.output { - FnRetTy::Default(..) => true, - FnRetTy::Ty(ty) if ty.kind.is_unit() => true, - FnRetTy::Ty(_) => false, - }; - - if returns_nothing && !is_async && !block.stmts.is_empty() { - // This main function should be linted, but only if there are no other functions - relevant_main_found = true; - } else { - // This main function should not be linted, we're done - return false; - } - }, - // Tests with one of these items are ignored - ItemKind::Static(..) - | ItemKind::Const(..) - | ItemKind::ExternCrate(..) - | ItemKind::ForeignMod(..) - // Another function was found; this case is ignored - | ItemKind::Fn(..) => return false, - _ => {}, - }, - Ok(None) => break, - Err(e) => { - e.cancel(); - return false; - }, - } - } - - relevant_main_found - }) - }) - .ok() - .unwrap_or_default() - } - - let trailing_whitespace = text.len() - text.trim_end().len(); - - // Because of the global session, we need to create a new session in a different thread with - // the edition we need. - let text = text.to_owned(); - if thread::spawn(move || has_needless_main(text, edition)) - .join() - .expect("thread::spawn failed") - && let Some(span) = fragments.span(cx, range.start..range.end - trailing_whitespace) - { - span_lint(cx, NEEDLESS_DOCTEST_MAIN, span, "needless `fn main` in doctest"); - } -} - -fn check_text(cx: &LateContext<'_>, valid_idents: &FxHashSet<String>, text: &str, span: Span) { - for word in text.split(|c: char| c.is_whitespace() || c == '\'') { - // Trim punctuation as in `some comment (see foo::bar).` - // ^^ - // Or even as in `_foo bar_` which is emphasized. Also preserve `::` as a prefix/suffix. - let mut word = word.trim_matches(|c: char| !c.is_alphanumeric() && c != ':'); - - // Remove leading or trailing single `:` which may be part of a sentence. - if word.starts_with(':') && !word.starts_with("::") { - word = word.trim_start_matches(':'); - } - if word.ends_with(':') && !word.ends_with("::") { - word = word.trim_end_matches(':'); - } - - if valid_idents.contains(word) || word.chars().all(|c| c == ':') { - continue; - } - - // Adjust for the current word - let offset = word.as_ptr() as usize - text.as_ptr() as usize; - let span = Span::new( - span.lo() + BytePos::from_usize(offset), - span.lo() + BytePos::from_usize(offset + word.len()), - span.ctxt(), - span.parent(), - ); - - check_word(cx, word, span); - } -} - -fn check_word(cx: &LateContext<'_>, word: &str, span: Span) { - /// Checks if a string is upper-camel-case, i.e., starts with an uppercase and - /// contains at least two uppercase letters (`Clippy` is ok) and one lower-case - /// letter (`NASA` is ok). - /// Plurals are also excluded (`IDs` is ok). - fn is_camel_case(s: &str) -> bool { - if s.starts_with(|c: char| c.is_ascii_digit() | c.is_ascii_lowercase()) { - return false; - } - - let s = s.strip_suffix('s').unwrap_or(s); - - s.chars().all(char::is_alphanumeric) - && s.chars().filter(|&c| c.is_uppercase()).take(2).count() > 1 - && s.chars().filter(|&c| c.is_lowercase()).take(1).count() > 0 - } - - fn has_underscore(s: &str) -> bool { - s != "_" && !s.contains("\\_") && s.contains('_') - } - - fn has_hyphen(s: &str) -> bool { - s != "-" && s.contains('-') - } - - if let Ok(url) = Url::parse(word) { - // try to get around the fact that `foo::bar` parses as a valid URL - if !url.cannot_be_a_base() { - span_lint( - cx, - DOC_MARKDOWN, - span, - "you should put bare URLs between `<`/`>` or make a proper Markdown link", - ); - - return; - } - } - - // We assume that mixed-case words are not meant to be put inside backticks. (Issue #2343) - if has_underscore(word) && has_hyphen(word) { - return; - } - - if has_underscore(word) || word.contains("::") || is_camel_case(word) { - let mut applicability = Applicability::MachineApplicable; - - span_lint_and_then( - cx, - DOC_MARKDOWN, - span, - "item in documentation is missing backticks", - |diag| { - let snippet = snippet_with_applicability(cx, span, "..", &mut applicability); - diag.span_suggestion_with_style( - span, - "try", - format!("`{snippet}`"), - applicability, - // always show the suggestion in a separate line, since the - // inline presentation adds another pair of backticks - SuggestionStyle::ShowAlways, - ); - }, - ); - } -} - struct FindPanicUnwrap<'a, 'tcx> { cx: &'a LateContext<'tcx>, panic_span: Option<Span>, typeck_results: &'tcx ty::TypeckResults<'tcx>, } +impl<'a, 'tcx> FindPanicUnwrap<'a, 'tcx> { + pub fn find_span( + cx: &'a LateContext<'tcx>, + typeck_results: &'tcx ty::TypeckResults<'tcx>, + body: impl Visitable<'tcx>, + ) -> Option<Span> { + let mut vis = Self { + cx, + panic_span: None, + typeck_results, + }; + body.visit(&mut vis); + vis.panic_span + } +} + impl<'a, 'tcx> Visitor<'tcx> for FindPanicUnwrap<'a, 'tcx> { type NestedFilter = nested_filter::OnlyBodies; diff --git a/src/tools/clippy/clippy_lints/src/doc/needless_doctest_main.rs b/src/tools/clippy/clippy_lints/src/doc/needless_doctest_main.rs new file mode 100644 index 000000000..c639813a3 --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/doc/needless_doctest_main.rs @@ -0,0 +1,135 @@ +use std::ops::Range; +use std::{io, thread}; + +use crate::doc::{NEEDLESS_DOCTEST_MAIN, TEST_ATTR_IN_DOCTEST}; +use clippy_utils::diagnostics::span_lint; +use rustc_ast::{CoroutineKind, Fn, FnRetTy, Item, ItemKind}; +use rustc_data_structures::sync::Lrc; +use rustc_errors::emitter::EmitterWriter; +use rustc_errors::DiagCtxt; +use rustc_lint::LateContext; +use rustc_parse::maybe_new_parser_from_source_str; +use rustc_parse::parser::ForceCollect; +use rustc_session::parse::ParseSess; +use rustc_span::edition::Edition; +use rustc_span::source_map::{FilePathMapping, SourceMap}; +use rustc_span::{sym, FileName, Pos}; + +use super::Fragments; + +fn get_test_spans(item: &Item, test_attr_spans: &mut Vec<Range<usize>>) { + test_attr_spans.extend( + item.attrs + .iter() + .find(|attr| attr.has_name(sym::test)) + .map(|attr| attr.span.lo().to_usize()..item.ident.span.hi().to_usize()), + ); +} + +pub fn check( + cx: &LateContext<'_>, + text: &str, + edition: Edition, + range: Range<usize>, + fragments: Fragments<'_>, + ignore: bool, +) { + // return whether the code contains a needless `fn main` plus a vector of byte position ranges + // of all `#[test]` attributes in not ignored code examples + fn check_code_sample(code: String, edition: Edition, ignore: bool) -> (bool, Vec<Range<usize>>) { + rustc_driver::catch_fatal_errors(|| { + rustc_span::create_session_globals_then(edition, || { + let mut test_attr_spans = vec![]; + let filename = FileName::anon_source_code(&code); + + let fallback_bundle = + rustc_errors::fallback_fluent_bundle(rustc_driver::DEFAULT_LOCALE_RESOURCES.to_vec(), false); + let emitter = EmitterWriter::new(Box::new(io::sink()), fallback_bundle); + let dcx = DiagCtxt::with_emitter(Box::new(emitter)).disable_warnings(); + #[expect(clippy::arc_with_non_send_sync)] // `Lrc` is expected by with_dcx + let sm = Lrc::new(SourceMap::new(FilePathMapping::empty())); + let sess = ParseSess::with_dcx(dcx, sm); + + let mut parser = match maybe_new_parser_from_source_str(&sess, filename, code) { + Ok(p) => p, + Err(errs) => { + drop(errs); + return (false, test_attr_spans); + }, + }; + + let mut relevant_main_found = false; + let mut eligible = true; + loop { + match parser.parse_item(ForceCollect::No) { + Ok(Some(item)) => match &item.kind { + ItemKind::Fn(box Fn { + sig, body: Some(block), .. + }) if item.ident.name == sym::main => { + if !ignore { + get_test_spans(&item, &mut test_attr_spans); + } + let is_async = matches!(sig.header.coroutine_kind, Some(CoroutineKind::Async { .. })); + let returns_nothing = match &sig.decl.output { + FnRetTy::Default(..) => true, + FnRetTy::Ty(ty) if ty.kind.is_unit() => true, + FnRetTy::Ty(_) => false, + }; + + if returns_nothing && !is_async && !block.stmts.is_empty() { + // This main function should be linted, but only if there are no other functions + relevant_main_found = true; + } else { + // This main function should not be linted, we're done + eligible = false; + } + }, + // Another function was found; this case is ignored for needless_doctest_main + ItemKind::Fn(box Fn { .. }) => { + eligible = false; + if !ignore { + get_test_spans(&item, &mut test_attr_spans); + } + }, + // Tests with one of these items are ignored + ItemKind::Static(..) + | ItemKind::Const(..) + | ItemKind::ExternCrate(..) + | ItemKind::ForeignMod(..) => { + eligible = false; + }, + _ => {}, + }, + Ok(None) => break, + Err(e) => { + e.cancel(); + return (false, test_attr_spans); + }, + } + } + + (relevant_main_found & eligible, test_attr_spans) + }) + }) + .ok() + .unwrap_or_default() + } + + let trailing_whitespace = text.len() - text.trim_end().len(); + + // Because of the global session, we need to create a new session in a different thread with + // the edition we need. + let text = text.to_owned(); + let (has_main, test_attr_spans) = thread::spawn(move || check_code_sample(text, edition, ignore)) + .join() + .expect("thread::spawn failed"); + if has_main && let Some(span) = fragments.span(cx, range.start..range.end - trailing_whitespace) { + span_lint(cx, NEEDLESS_DOCTEST_MAIN, span, "needless `fn main` in doctest"); + } + for span in test_attr_spans { + let span = (range.start + span.start)..(range.start + span.end); + if let Some(span) = fragments.span(cx, span) { + span_lint(cx, TEST_ATTR_IN_DOCTEST, span, "unit tests in doctest are not executed"); + } + } +} diff --git a/src/tools/clippy/clippy_lints/src/doc/suspicious_doc_comments.rs b/src/tools/clippy/clippy_lints/src/doc/suspicious_doc_comments.rs new file mode 100644 index 000000000..d7ad30efe --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/doc/suspicious_doc_comments.rs @@ -0,0 +1,48 @@ +use clippy_utils::diagnostics::span_lint_and_then; +use rustc_ast::token::CommentKind; +use rustc_ast::{AttrKind, AttrStyle, Attribute}; +use rustc_errors::Applicability; +use rustc_lint::LateContext; +use rustc_span::Span; + +use super::SUSPICIOUS_DOC_COMMENTS; + +pub fn check(cx: &LateContext<'_>, attrs: &[Attribute]) { + let replacements: Vec<_> = collect_doc_replacements(attrs); + + if let Some((&(lo_span, _), &(hi_span, _))) = replacements.first().zip(replacements.last()) { + span_lint_and_then( + cx, + SUSPICIOUS_DOC_COMMENTS, + lo_span.to(hi_span), + "this is an outer doc comment and does not apply to the parent module or crate", + |diag| { + diag.multipart_suggestion( + "use an inner doc comment to document the parent module or crate", + replacements, + Applicability::MaybeIncorrect, + ); + }, + ); + } +} + +fn collect_doc_replacements(attrs: &[Attribute]) -> Vec<(Span, String)> { + attrs + .iter() + .filter_map(|attr| { + if let AttrKind::DocComment(com_kind, sym) = attr.kind + && let AttrStyle::Outer = attr.style + && let Some(com) = sym.as_str().strip_prefix('!') + { + let sugg = match com_kind { + CommentKind::Line => format!("//!{com}"), + CommentKind::Block => format!("/*!{com}*/"), + }; + Some((attr.span, sugg)) + } else { + None + } + }) + .collect() +} diff --git a/src/tools/clippy/clippy_lints/src/double_parens.rs b/src/tools/clippy/clippy_lints/src/double_parens.rs index 63f32173b..b51bb7951 100644 --- a/src/tools/clippy/clippy_lints/src/double_parens.rs +++ b/src/tools/clippy/clippy_lints/src/double_parens.rs @@ -1,7 +1,7 @@ use clippy_utils::diagnostics::span_lint; use rustc_ast::ast::{Expr, ExprKind}; use rustc_lint::{EarlyContext, EarlyLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/drop_forget_ref.rs b/src/tools/clippy/clippy_lints/src/drop_forget_ref.rs index 177e04dfa..124d78fc4 100644 --- a/src/tools/clippy/clippy_lints/src/drop_forget_ref.rs +++ b/src/tools/clippy/clippy_lints/src/drop_forget_ref.rs @@ -3,7 +3,7 @@ use clippy_utils::ty::{is_copy, is_must_use_ty, is_type_lang_item}; use clippy_utils::{get_parent_node, is_must_use_func_call}; use rustc_hir::{Arm, Expr, ExprKind, LangItem, Node}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; use std::borrow::Cow; diff --git a/src/tools/clippy/clippy_lints/src/duplicate_mod.rs b/src/tools/clippy/clippy_lints/src/duplicate_mod.rs index 7ff7068f0..471335c09 100644 --- a/src/tools/clippy/clippy_lints/src/duplicate_mod.rs +++ b/src/tools/clippy/clippy_lints/src/duplicate_mod.rs @@ -2,7 +2,7 @@ use clippy_utils::diagnostics::span_lint_and_help; use rustc_ast::ast::{Crate, Inline, Item, ItemKind, ModKind}; use rustc_errors::MultiSpan; use rustc_lint::{EarlyContext, EarlyLintPass, Level, LintContext}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::{FileName, Span}; use std::collections::BTreeMap; use std::path::PathBuf; diff --git a/src/tools/clippy/clippy_lints/src/else_if_without_else.rs b/src/tools/clippy/clippy_lints/src/else_if_without_else.rs index 61db1c1ab..47780cab9 100644 --- a/src/tools/clippy/clippy_lints/src/else_if_without_else.rs +++ b/src/tools/clippy/clippy_lints/src/else_if_without_else.rs @@ -4,7 +4,7 @@ use clippy_utils::diagnostics::span_lint_and_help; use rustc_ast::ast::{Expr, ExprKind}; use rustc_lint::{EarlyContext, EarlyLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/empty_drop.rs b/src/tools/clippy/clippy_lints/src/empty_drop.rs index 5fcdca7cf..1d2b907b9 100644 --- a/src/tools/clippy/clippy_lints/src/empty_drop.rs +++ b/src/tools/clippy/clippy_lints/src/empty_drop.rs @@ -1,10 +1,9 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::peel_blocks; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{Body, ExprKind, Impl, ImplItemKind, Item, ItemKind, Node}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does @@ -36,31 +35,30 @@ declare_lint_pass!(EmptyDrop => [EMPTY_DROP]); impl LateLintPass<'_> for EmptyDrop { fn check_item(&mut self, cx: &LateContext<'_>, item: &Item<'_>) { - if_chain! { - if let ItemKind::Impl(Impl { - of_trait: Some(ref trait_ref), - items: [child], - .. - }) = item.kind; - if trait_ref.trait_def_id() == cx.tcx.lang_items().drop_trait(); - if let impl_item_hir = child.id.hir_id(); - if let Some(Node::ImplItem(impl_item)) = cx.tcx.hir().find(impl_item_hir); - if let ImplItemKind::Fn(_, b) = &impl_item.kind; - if let Body { value: func_expr, .. } = cx.tcx.hir().body(*b); - let func_expr = peel_blocks(func_expr); - if let ExprKind::Block(block, _) = func_expr.kind; - if block.stmts.is_empty() && block.expr.is_none(); - then { - span_lint_and_sugg( - cx, - EMPTY_DROP, - item.span, - "empty drop implementation", - "try removing this impl", - String::new(), - Applicability::MaybeIncorrect - ); - } + if let ItemKind::Impl(Impl { + of_trait: Some(ref trait_ref), + items: [child], + .. + }) = item.kind + && trait_ref.trait_def_id() == cx.tcx.lang_items().drop_trait() + && let impl_item_hir = child.id.hir_id() + && let Some(Node::ImplItem(impl_item)) = cx.tcx.opt_hir_node(impl_item_hir) + && let ImplItemKind::Fn(_, b) = &impl_item.kind + && let Body { value: func_expr, .. } = cx.tcx.hir().body(*b) + && let func_expr = peel_blocks(func_expr) + && let ExprKind::Block(block, _) = func_expr.kind + && block.stmts.is_empty() + && block.expr.is_none() + { + span_lint_and_sugg( + cx, + EMPTY_DROP, + item.span, + "empty drop implementation", + "try removing this impl", + String::new(), + Applicability::MaybeIncorrect, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/empty_enum.rs b/src/tools/clippy/clippy_lints/src/empty_enum.rs index a5699727b..420888b6c 100644 --- a/src/tools/clippy/clippy_lints/src/empty_enum.rs +++ b/src/tools/clippy/clippy_lints/src/empty_enum.rs @@ -3,7 +3,7 @@ use clippy_utils::diagnostics::span_lint_and_help; use rustc_hir::{Item, ItemKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/empty_structs_with_brackets.rs b/src/tools/clippy/clippy_lints/src/empty_structs_with_brackets.rs index 4e2a8b73c..3cf67b3ec 100644 --- a/src/tools/clippy/clippy_lints/src/empty_structs_with_brackets.rs +++ b/src/tools/clippy/clippy_lints/src/empty_structs_with_brackets.rs @@ -4,7 +4,7 @@ use rustc_ast::ast::{Item, ItemKind, VariantData}; use rustc_errors::Applicability; use rustc_lexer::TokenKind; use rustc_lint::{EarlyContext, EarlyLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::Span; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/endian_bytes.rs b/src/tools/clippy/clippy_lints/src/endian_bytes.rs index affd08221..b8a817e21 100644 --- a/src/tools/clippy/clippy_lints/src/endian_bytes.rs +++ b/src/tools/clippy/clippy_lints/src/endian_bytes.rs @@ -5,7 +5,7 @@ use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; use rustc_middle::ty::Ty; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::Symbol; use std::borrow::Cow; @@ -114,27 +114,23 @@ impl LateLintPass<'_> for EndianBytes { return; } - if_chain! { - if let ExprKind::MethodCall(method_name, receiver, args, ..) = expr.kind; - if args.is_empty(); - let ty = cx.typeck_results().expr_ty(receiver); - if ty.is_primitive_ty(); - if maybe_lint_endian_bytes(cx, expr, Prefix::To, method_name.ident.name, ty); - then { - return; - } + if let ExprKind::MethodCall(method_name, receiver, args, ..) = expr.kind + && args.is_empty() + && let ty = cx.typeck_results().expr_ty(receiver) + && ty.is_primitive_ty() + && maybe_lint_endian_bytes(cx, expr, Prefix::To, method_name.ident.name, ty) + { + return; } - if_chain! { - if let ExprKind::Call(function, ..) = expr.kind; - if let ExprKind::Path(qpath) = function.kind; - if let Some(def_id) = cx.qpath_res(&qpath, function.hir_id).opt_def_id(); - if let Some(function_name) = cx.get_def_path(def_id).last(); - let ty = cx.typeck_results().expr_ty(expr); - if ty.is_primitive_ty(); - then { - maybe_lint_endian_bytes(cx, expr, Prefix::From, *function_name, ty); - } + if let ExprKind::Call(function, ..) = expr.kind + && let ExprKind::Path(qpath) = function.kind + && let Some(def_id) = cx.qpath_res(&qpath, function.hir_id).opt_def_id() + && let Some(function_name) = cx.get_def_path(def_id).last() + && let ty = cx.typeck_results().expr_ty(expr) + && ty.is_primitive_ty() + { + maybe_lint_endian_bytes(cx, expr, Prefix::From, *function_name, ty); } } } diff --git a/src/tools/clippy/clippy_lints/src/entry.rs b/src/tools/clippy/clippy_lints/src/entry.rs index 3e3c62e85..ce0a1dfdc 100644 --- a/src/tools/clippy/clippy_lints/src/entry.rs +++ b/src/tools/clippy/clippy_lints/src/entry.rs @@ -10,7 +10,7 @@ use rustc_hir::hir_id::HirIdSet; use rustc_hir::intravisit::{walk_expr, Visitor}; use rustc_hir::{Block, Expr, ExprKind, Guard, HirId, Let, Pat, Stmt, StmtKind, UnOp}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::{Span, SyntaxContext, DUMMY_SP}; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/enum_clike.rs b/src/tools/clippy/clippy_lints/src/enum_clike.rs index 003b5fc72..30eb643c4 100644 --- a/src/tools/clippy/clippy_lints/src/enum_clike.rs +++ b/src/tools/clippy/clippy_lints/src/enum_clike.rs @@ -7,7 +7,7 @@ use rustc_hir::{Item, ItemKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::util::IntTypeExt; use rustc_middle::ty::{self, IntTy, UintTy}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/equatable_if_let.rs b/src/tools/clippy/clippy_lints/src/equatable_if_let.rs index 575fead5b..3c4352942 100644 --- a/src/tools/clippy/clippy_lints/src/equatable_if_let.rs +++ b/src/tools/clippy/clippy_lints/src/equatable_if_let.rs @@ -6,7 +6,7 @@ use rustc_hir::{Expr, ExprKind, Pat, PatKind}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; use rustc_middle::ty::Ty; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does @@ -46,9 +46,12 @@ fn unary_pattern(pat: &Pat<'_>) -> bool { pats.iter().all(unary_pattern) } match &pat.kind { - PatKind::Slice(_, _, _) | PatKind::Range(_, _, _) | PatKind::Binding(..) | PatKind::Wild | PatKind::Or(_) => { - false - }, + PatKind::Slice(_, _, _) + | PatKind::Range(_, _, _) + | PatKind::Binding(..) + | PatKind::Wild + | PatKind::Never + | PatKind::Or(_) => false, PatKind::Struct(_, a, etc) => !etc && a.iter().all(|x| unary_pattern(x.pat)), PatKind::Tuple(a, etc) | PatKind::TupleStruct(_, a, etc) => etc.as_opt_usize().is_none() && array_rec(a), PatKind::Ref(x, _) | PatKind::Box(x) => unary_pattern(x), diff --git a/src/tools/clippy/clippy_lints/src/error_impl_error.rs b/src/tools/clippy/clippy_lints/src/error_impl_error.rs index bc878555c..8dbb47fad 100644 --- a/src/tools/clippy/clippy_lints/src/error_impl_error.rs +++ b/src/tools/clippy/clippy_lints/src/error_impl_error.rs @@ -5,7 +5,7 @@ use rustc_hir::def_id::{DefId, LocalDefId}; use rustc_hir::{Item, ItemKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::Visibility; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { @@ -58,7 +58,7 @@ impl<'tcx> LateLintPass<'tcx> for ErrorImplError { if let Some(trait_def_id) = imp.of_trait.and_then(|t| t.trait_def_id()) && error_def_id == trait_def_id && let Some(def_id) = path_res(cx, imp.self_ty).opt_def_id().and_then(DefId::as_local) - && let hir_id = cx.tcx.hir().local_def_id_to_hir_id(def_id) + && let hir_id = cx.tcx.local_def_id_to_hir_id(def_id) && let Some(ident) = cx.tcx.opt_item_ident(def_id.to_def_id()) && ident.name == sym::Error && is_visible_outside_module(cx, def_id) => diff --git a/src/tools/clippy/clippy_lints/src/escape.rs b/src/tools/clippy/clippy_lints/src/escape.rs index 3d0ddca19..b77762630 100644 --- a/src/tools/clippy/clippy_lints/src/escape.rs +++ b/src/tools/clippy/clippy_lints/src/escape.rs @@ -1,15 +1,15 @@ use clippy_utils::diagnostics::span_lint_hir; -use rustc_hir::{self, intravisit, AssocItemKind, Body, FnDecl, HirId, HirIdSet, Impl, ItemKind, Node, Pat, PatKind}; +use rustc_hir::{intravisit, AssocItemKind, Body, FnDecl, HirId, HirIdSet, Impl, ItemKind, Node, Pat, PatKind}; use rustc_hir_typeck::expr_use_visitor::{Delegate, ExprUseVisitor, PlaceBase, PlaceWithHirId}; use rustc_infer::infer::TyCtxtInferExt; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::mir::FakeReadCause; use rustc_middle::ty::layout::LayoutOf; -use rustc_middle::ty::{self, TraitRef, Ty}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_middle::ty::{self, TraitRef, Ty, TyCtxt}; +use rustc_session::impl_lint_pass; use rustc_span::def_id::LocalDefId; -use rustc_span::Span; use rustc_span::symbol::kw; +use rustc_span::Span; use rustc_target::spec::abi::Abi; #[derive(Copy, Clone)] @@ -74,9 +74,9 @@ impl<'tcx> LateLintPass<'tcx> for BoxedLocal { let parent_id = cx .tcx .hir() - .get_parent_item(cx.tcx.hir().local_def_id_to_hir_id(fn_def_id)) + .get_parent_item(cx.tcx.local_def_id_to_hir_id(fn_def_id)) .def_id; - let parent_node = cx.tcx.hir().find_by_def_id(parent_id); + let parent_node = cx.tcx.opt_hir_node_by_def_id(parent_id); let mut trait_self_ty = None; if let Some(Node::Item(item)) = parent_node { @@ -122,8 +122,8 @@ impl<'tcx> LateLintPass<'tcx> for BoxedLocal { } // TODO: Replace with Map::is_argument(..) when it's fixed -fn is_argument(map: rustc_middle::hir::map::Map<'_>, id: HirId) -> bool { - match map.find(id) { +fn is_argument(tcx: TyCtxt<'_>, id: HirId) -> bool { + match tcx.opt_hir_node(id) { Some(Node::Pat(Pat { kind: PatKind::Binding(..), .. @@ -131,7 +131,7 @@ fn is_argument(map: rustc_middle::hir::map::Map<'_>, id: HirId) -> bool { _ => return false, } - matches!(map.find_parent(id), Some(Node::Param(_))) + matches!(tcx.hir().find_parent(id), Some(Node::Param(_))) } impl<'a, 'tcx> Delegate<'tcx> for EscapeDelegate<'a, 'tcx> { @@ -154,7 +154,7 @@ impl<'a, 'tcx> Delegate<'tcx> for EscapeDelegate<'a, 'tcx> { fn mutate(&mut self, cmt: &PlaceWithHirId<'tcx>, _: HirId) { if cmt.place.projections.is_empty() { let map = &self.cx.tcx.hir(); - if is_argument(*map, cmt.hir_id) { + if is_argument(self.cx.tcx, cmt.hir_id) { // Skip closure arguments let parent_id = map.parent_id(cmt.hir_id); if let Some(Node::Expr(..)) = map.find_parent(parent_id) { diff --git a/src/tools/clippy/clippy_lints/src/eta_reduction.rs b/src/tools/clippy/clippy_lints/src/eta_reduction.rs index fad8fbf04..450cee400 100644 --- a/src/tools/clippy/clippy_lints/src/eta_reduction.rs +++ b/src/tools/clippy/clippy_lints/src/eta_reduction.rs @@ -13,7 +13,7 @@ use rustc_middle::ty::{ self, Binder, ClosureArgs, ClosureKind, EarlyBinder, FnSig, GenericArg, GenericArgKind, GenericArgsRef, ImplPolarity, List, Region, RegionKind, Ty, TypeVisitableExt, TypeckResults, }; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::symbol::sym; use rustc_target::spec::abi::Abi; use rustc_trait_selection::traits::error_reporting::InferCtxtExt as _; @@ -220,7 +220,8 @@ fn check_inputs( params.len() == self_arg.map_or(0, |_| 1) + args.len() && params.iter().zip(self_arg.into_iter().chain(args)).all(|(p, arg)| { matches!( - p.pat.kind,PatKind::Binding(BindingAnnotation::NONE, id, _, None) + p.pat.kind, + PatKind::Binding(BindingAnnotation::NONE, id, _, None) if path_to_local_id(arg, id) ) // Only allow adjustments which change regions (i.e. re-borrowing). @@ -247,8 +248,7 @@ fn check_sig<'tcx>(cx: &LateContext<'tcx>, closure: ClosureArgs<'tcx>, call_sig: /// This is needed because rustc is unable to late bind early-bound regions in a function signature. fn has_late_bound_to_non_late_bound_regions(from_sig: FnSig<'_>, to_sig: FnSig<'_>) -> bool { fn check_region(from_region: Region<'_>, to_region: Region<'_>) -> bool { - matches!(from_region.kind(), RegionKind::ReLateBound(..)) - && !matches!(to_region.kind(), RegionKind::ReLateBound(..)) + matches!(from_region.kind(), RegionKind::ReBound(..)) && !matches!(to_region.kind(), RegionKind::ReBound(..)) } fn check_subs(from_subs: &[GenericArg<'_>], to_subs: &[GenericArg<'_>]) -> bool { @@ -290,7 +290,7 @@ fn has_late_bound_to_non_late_bound_regions(from_sig: FnSig<'_>, to_sig: FnSig<' .zip(to_tys) .any(|(from_ty, to_ty)| check_ty(from_ty, to_ty)) }, - _ => from_ty.has_late_bound_regions(), + _ => from_ty.has_bound_regions(), } } diff --git a/src/tools/clippy/clippy_lints/src/excessive_bools.rs b/src/tools/clippy/clippy_lints/src/excessive_bools.rs index 1d18e194d..c5f7212c4 100644 --- a/src/tools/clippy/clippy_lints/src/excessive_bools.rs +++ b/src/tools/clippy/clippy_lints/src/excessive_bools.rs @@ -3,7 +3,7 @@ use clippy_utils::{get_parent_as_impl, has_repr_attr, is_bool}; use rustc_hir::intravisit::FnKind; use rustc_hir::{Body, FnDecl, Item, ItemKind, TraitFn, TraitItem, TraitItemKind, Ty}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::def_id::LocalDefId; use rustc_span::Span; use rustc_target::spec::abi::Abi; @@ -171,7 +171,7 @@ impl<'tcx> LateLintPass<'tcx> for ExcessiveBools { span: Span, def_id: LocalDefId, ) { - let hir_id = cx.tcx.hir().local_def_id_to_hir_id(def_id); + let hir_id = cx.tcx.local_def_id_to_hir_id(def_id); if let Some(fn_header) = fn_kind.header() && fn_header.abi == Abi::Rust && get_parent_as_impl(cx.tcx, hir_id).map_or(true, |impl_item| impl_item.of_trait.is_none()) diff --git a/src/tools/clippy/clippy_lints/src/excessive_nesting.rs b/src/tools/clippy/clippy_lints/src/excessive_nesting.rs index 83480fc5e..4b0d11c5d 100644 --- a/src/tools/clippy/clippy_lints/src/excessive_nesting.rs +++ b/src/tools/clippy/clippy_lints/src/excessive_nesting.rs @@ -5,7 +5,7 @@ use rustc_ast::visit::{walk_block, walk_item, Visitor}; use rustc_ast::{Block, Crate, Inline, Item, ItemKind, ModKind, NodeId}; use rustc_lint::{EarlyContext, EarlyLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::Span; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/exhaustive_items.rs b/src/tools/clippy/clippy_lints/src/exhaustive_items.rs index f976cfd3f..3a621d967 100644 --- a/src/tools/clippy/clippy_lints/src/exhaustive_items.rs +++ b/src/tools/clippy/clippy_lints/src/exhaustive_items.rs @@ -1,10 +1,9 @@ use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::source::indent_of; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{Item, ItemKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { @@ -71,40 +70,31 @@ declare_lint_pass!(ExhaustiveItems => [EXHAUSTIVE_ENUMS, EXHAUSTIVE_STRUCTS]); impl LateLintPass<'_> for ExhaustiveItems { fn check_item(&mut self, cx: &LateContext<'_>, item: &Item<'_>) { - if_chain! { - if let ItemKind::Enum(..) | ItemKind::Struct(..) = item.kind; - if cx.effective_visibilities.is_exported(item.owner_id.def_id); - let attrs = cx.tcx.hir().attrs(item.hir_id()); - if !attrs.iter().any(|a| a.has_name(sym::non_exhaustive)); - then { - let (lint, msg) = if let ItemKind::Struct(ref v, ..) = item.kind { - if v.fields().iter().any(|f| { - !cx.tcx.visibility(f.def_id).is_public() - }) { - // skip structs with private fields - return; - } - (EXHAUSTIVE_STRUCTS, "exported structs should not be exhaustive") - } else { - (EXHAUSTIVE_ENUMS, "exported enums should not be exhaustive") - }; - let suggestion_span = item.span.shrink_to_lo(); - let indent = " ".repeat(indent_of(cx, item.span).unwrap_or(0)); - span_lint_and_then( - cx, - lint, - item.span, - msg, - |diag| { - let sugg = format!("#[non_exhaustive]\n{indent}"); - diag.span_suggestion(suggestion_span, - "try adding #[non_exhaustive]", - sugg, - Applicability::MaybeIncorrect); - } + if let ItemKind::Enum(..) | ItemKind::Struct(..) = item.kind + && cx.effective_visibilities.is_exported(item.owner_id.def_id) + && let attrs = cx.tcx.hir().attrs(item.hir_id()) + && !attrs.iter().any(|a| a.has_name(sym::non_exhaustive)) + { + let (lint, msg) = if let ItemKind::Struct(ref v, ..) = item.kind { + if v.fields().iter().any(|f| !cx.tcx.visibility(f.def_id).is_public()) { + // skip structs with private fields + return; + } + (EXHAUSTIVE_STRUCTS, "exported structs should not be exhaustive") + } else { + (EXHAUSTIVE_ENUMS, "exported enums should not be exhaustive") + }; + let suggestion_span = item.span.shrink_to_lo(); + let indent = " ".repeat(indent_of(cx, item.span).unwrap_or(0)); + span_lint_and_then(cx, lint, item.span, msg, |diag| { + let sugg = format!("#[non_exhaustive]\n{indent}"); + diag.span_suggestion( + suggestion_span, + "try adding #[non_exhaustive]", + sugg, + Applicability::MaybeIncorrect, ); - - } + }); } } } diff --git a/src/tools/clippy/clippy_lints/src/exit.rs b/src/tools/clippy/clippy_lints/src/exit.rs index e14b1c556..6603512c7 100644 --- a/src/tools/clippy/clippy_lints/src/exit.rs +++ b/src/tools/clippy/clippy_lints/src/exit.rs @@ -1,9 +1,8 @@ use clippy_utils::diagnostics::span_lint; use clippy_utils::is_entrypoint_fn; -use if_chain::if_chain; use rustc_hir::{Expr, ExprKind, Item, ItemKind, Node}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { @@ -42,19 +41,17 @@ declare_lint_pass!(Exit => [EXIT]); impl<'tcx> LateLintPass<'tcx> for Exit { fn check_expr(&mut self, cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) { - if_chain! { - if let ExprKind::Call(path_expr, _args) = e.kind; - if let ExprKind::Path(ref path) = path_expr.kind; - if let Some(def_id) = cx.qpath_res(path, path_expr.hir_id).opt_def_id(); - if cx.tcx.is_diagnostic_item(sym::process_exit, def_id); - let parent = cx.tcx.hir().get_parent_item(e.hir_id).def_id; - if let Some(Node::Item(Item{kind: ItemKind::Fn(..), ..})) = cx.tcx.hir().find_by_def_id(parent); + if let ExprKind::Call(path_expr, _args) = e.kind + && let ExprKind::Path(ref path) = path_expr.kind + && let Some(def_id) = cx.qpath_res(path, path_expr.hir_id).opt_def_id() + && cx.tcx.is_diagnostic_item(sym::process_exit, def_id) + && let parent = cx.tcx.hir().get_parent_item(e.hir_id).def_id + && let Some(Node::Item(Item{kind: ItemKind::Fn(..), ..})) = cx.tcx.opt_hir_node_by_def_id(parent) // If the next item up is a function we check if it is an entry point // and only then emit a linter warning - if !is_entrypoint_fn(cx, parent.to_def_id()); - then { - span_lint(cx, EXIT, e.span, "usage of `process::exit`"); - } + && !is_entrypoint_fn(cx, parent.to_def_id()) + { + span_lint(cx, EXIT, e.span, "usage of `process::exit`"); } } } diff --git a/src/tools/clippy/clippy_lints/src/explicit_write.rs b/src/tools/clippy/clippy_lints/src/explicit_write.rs index 4b5bcb06a..e8c1e5db3 100644 --- a/src/tools/clippy/clippy_lints/src/explicit_write.rs +++ b/src/tools/clippy/clippy_lints/src/explicit_write.rs @@ -2,12 +2,11 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::macros::{find_format_args, format_args_inputs_span}; use clippy_utils::source::snippet_with_applicability; use clippy_utils::{is_expn_of, path_def_id}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::def::Res; use rustc_hir::{BindingAnnotation, Block, BlockCheckMode, Expr, ExprKind, Node, PatKind, QPath, Stmt, StmtKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::{sym, ExpnId}; declare_clippy_lint! { @@ -16,7 +15,7 @@ declare_clippy_lint! { /// replaced with `(e)print!()` / `(e)println!()` /// /// ### Why is this bad? - /// Using `(e)println! is clearer and more concise + /// Using `(e)println!` is clearer and more concise /// /// ### Example /// ```no_run @@ -101,30 +100,28 @@ impl<'tcx> LateLintPass<'tcx> for ExplicitWrite { /// If `kind` is a block that looks like `{ let result = $expr; result }` then /// returns $expr. Otherwise returns `kind`. fn look_in_block<'tcx, 'hir>(cx: &LateContext<'tcx>, kind: &'tcx ExprKind<'hir>) -> &'tcx ExprKind<'hir> { - if_chain! { - if let ExprKind::Block(block, _label @ None) = kind; - if let Block { + if let ExprKind::Block(block, _label @ None) = kind + && let Block { stmts: [Stmt { kind: StmtKind::Local(local), .. }], expr: Some(expr_end_of_block), rules: BlockCheckMode::DefaultBlock, .. - } = block; + } = block // Find id of the local that expr_end_of_block resolves to - if let ExprKind::Path(QPath::Resolved(None, expr_path)) = expr_end_of_block.kind; - if let Res::Local(expr_res) = expr_path.res; - if let Some(Node::Pat(res_pat)) = cx.tcx.hir().find(expr_res); + && let ExprKind::Path(QPath::Resolved(None, expr_path)) = expr_end_of_block.kind + && let Res::Local(expr_res) = expr_path.res + && let Some(Node::Pat(res_pat)) = cx.tcx.opt_hir_node(expr_res) // Find id of the local we found in the block - if let PatKind::Binding(BindingAnnotation::NONE, local_hir_id, _ident, None) = local.pat.kind; + && let PatKind::Binding(BindingAnnotation::NONE, local_hir_id, _ident, None) = local.pat.kind // If those two are the same hir id - if res_pat.hir_id == local_hir_id; + && res_pat.hir_id == local_hir_id - if let Some(init) = local.init; - then { - return &init.kind; - } + && let Some(init) = local.init + { + return &init.kind; } kind } diff --git a/src/tools/clippy/clippy_lints/src/extra_unused_type_parameters.rs b/src/tools/clippy/clippy_lints/src/extra_unused_type_parameters.rs index d6c746901..538d29eb4 100644 --- a/src/tools/clippy/clippy_lints/src/extra_unused_type_parameters.rs +++ b/src/tools/clippy/clippy_lints/src/extra_unused_type_parameters.rs @@ -10,7 +10,7 @@ use rustc_hir::{ use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::hir::nested_filter; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::def_id::{DefId, LocalDefId}; use rustc_span::Span; diff --git a/src/tools/clippy/clippy_lints/src/fallible_impl_from.rs b/src/tools/clippy/clippy_lints/src/fallible_impl_from.rs index efb69476b..044694332 100644 --- a/src/tools/clippy/clippy_lints/src/fallible_impl_from.rs +++ b/src/tools/clippy/clippy_lints/src/fallible_impl_from.rs @@ -2,11 +2,10 @@ use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::macros::{is_panic, root_macro_call_first_node}; use clippy_utils::method_chain_args; use clippy_utils::ty::is_type_diagnostic_item; -use if_chain::if_chain; use rustc_hir as hir; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::{sym, Span}; declare_clippy_lint! { @@ -53,13 +52,13 @@ declare_lint_pass!(FallibleImplFrom => [FALLIBLE_IMPL_FROM]); impl<'tcx> LateLintPass<'tcx> for FallibleImplFrom { fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx hir::Item<'_>) { // check for `impl From<???> for ..` - if_chain! { - if let hir::ItemKind::Impl(impl_) = &item.kind; - if let Some(impl_trait_ref) = cx.tcx.impl_trait_ref(item.owner_id); - if cx.tcx.is_diagnostic_item(sym::From, impl_trait_ref.skip_binder().def_id); - then { - lint_impl_body(cx, item.span, impl_.items); - } + if let hir::ItemKind::Impl(impl_) = &item.kind + && let Some(impl_trait_ref) = cx.tcx.impl_trait_ref(item.owner_id) + && cx + .tcx + .is_diagnostic_item(sym::From, impl_trait_ref.skip_binder().def_id) + { + lint_impl_body(cx, item.span, impl_.items); } } } @@ -98,34 +97,33 @@ fn lint_impl_body(cx: &LateContext<'_>, impl_span: Span, impl_items: &[hir::Impl } for impl_item in impl_items { - if_chain! { - if impl_item.ident.name == sym::from; - if let ImplItemKind::Fn(_, body_id) = - cx.tcx.hir().impl_item(impl_item.id).kind; - then { - // check the body for `begin_panic` or `unwrap` - let body = cx.tcx.hir().body(body_id); - let mut fpu = FindPanicUnwrap { - lcx: cx, - typeck_results: cx.tcx.typeck(impl_item.id.owner_id.def_id), - result: Vec::new(), - }; - fpu.visit_expr(body.value); + if impl_item.ident.name == sym::from + && let ImplItemKind::Fn(_, body_id) = cx.tcx.hir().impl_item(impl_item.id).kind + { + // check the body for `begin_panic` or `unwrap` + let body = cx.tcx.hir().body(body_id); + let mut fpu = FindPanicUnwrap { + lcx: cx, + typeck_results: cx.tcx.typeck(impl_item.id.owner_id.def_id), + result: Vec::new(), + }; + fpu.visit_expr(body.value); - // if we've found one, lint - if !fpu.result.is_empty() { - span_lint_and_then( - cx, - FALLIBLE_IMPL_FROM, - impl_span, - "consider implementing `TryFrom` instead", - move |diag| { - diag.help( - "`From` is intended for infallible conversions only. \ - Use `TryFrom` if there's a possibility for the conversion to fail"); - diag.span_note(fpu.result, "potential failure(s)"); - }); - } + // if we've found one, lint + if !fpu.result.is_empty() { + span_lint_and_then( + cx, + FALLIBLE_IMPL_FROM, + impl_span, + "consider implementing `TryFrom` instead", + move |diag| { + diag.help( + "`From` is intended for infallible conversions only. \ + Use `TryFrom` if there's a possibility for the conversion to fail", + ); + diag.span_note(fpu.result, "potential failure(s)"); + }, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/float_literal.rs b/src/tools/clippy/clippy_lints/src/float_literal.rs index 506a11917..38a16c5c8 100644 --- a/src/tools/clippy/clippy_lints/src/float_literal.rs +++ b/src/tools/clippy/clippy_lints/src/float_literal.rs @@ -1,12 +1,11 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::numeric_literal; -use if_chain::if_chain; use rustc_ast::ast::{self, LitFloatType, LitKind}; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::{self, FloatTy}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use std::fmt; declare_clippy_lint! { @@ -64,73 +63,70 @@ declare_lint_pass!(FloatLiteral => [EXCESSIVE_PRECISION, LOSSY_FLOAT_LITERAL]); impl<'tcx> LateLintPass<'tcx> for FloatLiteral { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx hir::Expr<'_>) { let ty = cx.typeck_results().expr_ty(expr); - if_chain! { - if let ty::Float(fty) = *ty.kind(); - if let hir::ExprKind::Lit(lit) = expr.kind; - if let LitKind::Float(sym, lit_float_ty) = lit.node; - then { - let sym_str = sym.as_str(); - let formatter = FloatFormat::new(sym_str); - // Try to bail out if the float is for sure fine. - // If its within the 2 decimal digits of being out of precision we - // check if the parsed representation is the same as the string - // since we'll need the truncated string anyway. - let digits = count_digits(sym_str); - let max = max_digits(fty); - let type_suffix = match lit_float_ty { - LitFloatType::Suffixed(ast::FloatTy::F32) => Some("f32"), - LitFloatType::Suffixed(ast::FloatTy::F64) => Some("f64"), - LitFloatType::Unsuffixed => None - }; - let (is_whole, is_inf, mut float_str) = match fty { - FloatTy::F32 => { - let value = sym_str.parse::<f32>().unwrap(); + if let ty::Float(fty) = *ty.kind() + && let hir::ExprKind::Lit(lit) = expr.kind + && let LitKind::Float(sym, lit_float_ty) = lit.node + { + let sym_str = sym.as_str(); + let formatter = FloatFormat::new(sym_str); + // Try to bail out if the float is for sure fine. + // If its within the 2 decimal digits of being out of precision we + // check if the parsed representation is the same as the string + // since we'll need the truncated string anyway. + let digits = count_digits(sym_str); + let max = max_digits(fty); + let type_suffix = match lit_float_ty { + LitFloatType::Suffixed(ast::FloatTy::F32) => Some("f32"), + LitFloatType::Suffixed(ast::FloatTy::F64) => Some("f64"), + LitFloatType::Unsuffixed => None, + }; + let (is_whole, is_inf, mut float_str) = match fty { + FloatTy::F32 => { + let value = sym_str.parse::<f32>().unwrap(); - (value.fract() == 0.0, value.is_infinite(), formatter.format(value)) - }, - FloatTy::F64 => { - let value = sym_str.parse::<f64>().unwrap(); + (value.fract() == 0.0, value.is_infinite(), formatter.format(value)) + }, + FloatTy::F64 => { + let value = sym_str.parse::<f64>().unwrap(); + (value.fract() == 0.0, value.is_infinite(), formatter.format(value)) + }, + }; - (value.fract() == 0.0, value.is_infinite(), formatter.format(value)) - }, - }; - - if is_inf { - return; - } - - if is_whole && !sym_str.contains(|c| c == 'e' || c == 'E') { - // Normalize the literal by stripping the fractional portion - if sym_str.split('.').next().unwrap() != float_str { - // If the type suffix is missing the suggestion would be - // incorrectly interpreted as an integer so adding a `.0` - // suffix to prevent that. - if type_suffix.is_none() { - float_str.push_str(".0"); - } + if is_inf { + return; + } - span_lint_and_sugg( - cx, - LOSSY_FLOAT_LITERAL, - expr.span, - "literal cannot be represented as the underlying type without loss of precision", - "consider changing the type or replacing it with", - numeric_literal::format(&float_str, type_suffix, true), - Applicability::MachineApplicable, - ); + if is_whole && !sym_str.contains(|c| c == 'e' || c == 'E') { + // Normalize the literal by stripping the fractional portion + if sym_str.split('.').next().unwrap() != float_str { + // If the type suffix is missing the suggestion would be + // incorrectly interpreted as an integer so adding a `.0` + // suffix to prevent that. + if type_suffix.is_none() { + float_str.push_str(".0"); } - } else if digits > max as usize && float_str.len() < sym_str.len() { + span_lint_and_sugg( cx, - EXCESSIVE_PRECISION, + LOSSY_FLOAT_LITERAL, expr.span, - "float has excessive precision", - "consider changing the type or truncating it to", + "literal cannot be represented as the underlying type without loss of precision", + "consider changing the type or replacing it with", numeric_literal::format(&float_str, type_suffix, true), Applicability::MachineApplicable, ); } + } else if digits > max as usize && float_str.len() < sym_str.len() { + span_lint_and_sugg( + cx, + EXCESSIVE_PRECISION, + expr.span, + "float has excessive precision", + "consider changing the type or truncating it to", + numeric_literal::format(&float_str, type_suffix, true), + Applicability::MachineApplicable, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/floating_point_arithmetic.rs b/src/tools/clippy/clippy_lints/src/floating_point_arithmetic.rs index 09a9d9924..c8b87e510 100644 --- a/src/tools/clippy/clippy_lints/src/floating_point_arithmetic.rs +++ b/src/tools/clippy/clippy_lints/src/floating_point_arithmetic.rs @@ -4,12 +4,11 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::{ eq_expr_value, get_parent_expr, higher, in_constant, is_no_std_crate, numeric_literal, peel_blocks, sugg, }; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{BinOpKind, Expr, ExprKind, PathSegment, UnOp}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::source_map::Spanned; use rustc_ast::ast; @@ -133,30 +132,25 @@ fn prepare_receiver_sugg<'a>(cx: &LateContext<'_>, mut expr: &'a Expr<'a>) -> Su expr = inner_expr; } - if_chain! { + if let ty::Float(float_ty) = cx.typeck_results().expr_ty(expr).kind() // if the expression is a float literal and it is unsuffixed then // add a suffix so the suggestion is valid and unambiguous - if let ty::Float(float_ty) = cx.typeck_results().expr_ty(expr).kind(); - if let ExprKind::Lit(lit) = &expr.kind; - if let ast::LitKind::Float(sym, ast::LitFloatType::Unsuffixed) = lit.node; - then { - let op = format!( - "{suggestion}{}{}", - // Check for float literals without numbers following the decimal - // separator such as `2.` and adds a trailing zero - if sym.as_str().ends_with('.') { - "0" - } else { - "" - }, - float_ty.name_str() - ).into(); - - suggestion = match suggestion { - Sugg::MaybeParen(_) => Sugg::MaybeParen(op), - _ => Sugg::NonParen(op) - }; - } + && let ExprKind::Lit(lit) = &expr.kind + && let ast::LitKind::Float(sym, ast::LitFloatType::Unsuffixed) = lit.node + { + let op = format!( + "{suggestion}{}{}", + // Check for float literals without numbers following the decimal + // separator such as `2.` and adds a trailing zero + if sym.as_str().ends_with('.') { "0" } else { "" }, + float_ty.name_str() + ) + .into(); + + suggestion = match suggestion { + Sugg::MaybeParen(_) => Sugg::MaybeParen(op), + _ => Sugg::NonParen(op), + }; } suggestion.maybe_par() @@ -359,35 +353,59 @@ fn detect_hypot(cx: &LateContext<'_>, receiver: &Expr<'_>) -> Option<String> { ) = receiver.kind { // check if expression of the form x * x + y * y - if_chain! { - if let ExprKind::Binary(Spanned { node: BinOpKind::Mul, .. }, lmul_lhs, lmul_rhs) = add_lhs.kind; - if let ExprKind::Binary(Spanned { node: BinOpKind::Mul, .. }, rmul_lhs, rmul_rhs) = add_rhs.kind; - if eq_expr_value(cx, lmul_lhs, lmul_rhs); - if eq_expr_value(cx, rmul_lhs, rmul_rhs); - then { - return Some(format!("{}.hypot({})", Sugg::hir(cx, lmul_lhs, "..").maybe_par(), Sugg::hir(cx, rmul_lhs, ".."))); - } + if let ExprKind::Binary( + Spanned { + node: BinOpKind::Mul, .. + }, + lmul_lhs, + lmul_rhs, + ) = add_lhs.kind + && let ExprKind::Binary( + Spanned { + node: BinOpKind::Mul, .. + }, + rmul_lhs, + rmul_rhs, + ) = add_rhs.kind + && eq_expr_value(cx, lmul_lhs, lmul_rhs) + && eq_expr_value(cx, rmul_lhs, rmul_rhs) + { + return Some(format!( + "{}.hypot({})", + Sugg::hir(cx, lmul_lhs, "..").maybe_par(), + Sugg::hir(cx, rmul_lhs, "..") + )); } // check if expression of the form x.powi(2) + y.powi(2) - if_chain! { - if let ExprKind::MethodCall( - PathSegment { ident: lmethod_name, .. }, - largs_0, [largs_1, ..], - _ - ) = &add_lhs.kind; - if let ExprKind::MethodCall( - PathSegment { ident: rmethod_name, .. }, - rargs_0, [rargs_1, ..], - _ - ) = &add_rhs.kind; - if lmethod_name.as_str() == "powi" && rmethod_name.as_str() == "powi"; - if let Some(lvalue) = constant(cx, cx.typeck_results(), largs_1); - if let Some(rvalue) = constant(cx, cx.typeck_results(), rargs_1); - if Int(2) == lvalue && Int(2) == rvalue; - then { - return Some(format!("{}.hypot({})", Sugg::hir(cx, largs_0, "..").maybe_par(), Sugg::hir(cx, rargs_0, ".."))); - } + if let ExprKind::MethodCall( + PathSegment { + ident: lmethod_name, .. + }, + largs_0, + [largs_1, ..], + _, + ) = &add_lhs.kind + && let ExprKind::MethodCall( + PathSegment { + ident: rmethod_name, .. + }, + rargs_0, + [rargs_1, ..], + _, + ) = &add_rhs.kind + && lmethod_name.as_str() == "powi" + && rmethod_name.as_str() == "powi" + && let Some(lvalue) = constant(cx, cx.typeck_results(), largs_1) + && let Some(rvalue) = constant(cx, cx.typeck_results(), rargs_1) + && Int(2) == lvalue + && Int(2) == rvalue + { + return Some(format!( + "{}.hypot({})", + Sugg::hir(cx, largs_0, "..").maybe_par(), + Sugg::hir(cx, rargs_0, "..") + )); } } @@ -411,39 +429,44 @@ fn check_hypot(cx: &LateContext<'_>, expr: &Expr<'_>, receiver: &Expr<'_>) { // TODO: Lint expressions of the form `x.exp() - y` where y > 1 // and suggest usage of `x.exp_m1() - (y - 1)` instead fn check_expm1(cx: &LateContext<'_>, expr: &Expr<'_>) { - if_chain! { - if let ExprKind::Binary(Spanned { node: BinOpKind::Sub, .. }, lhs, rhs) = expr.kind; - if cx.typeck_results().expr_ty(lhs).is_floating_point(); - if let Some(value) = constant(cx, cx.typeck_results(), rhs); - if F32(1.0) == value || F64(1.0) == value; - if let ExprKind::MethodCall(path, self_arg, ..) = &lhs.kind; - if cx.typeck_results().expr_ty(self_arg).is_floating_point(); - if path.ident.name.as_str() == "exp"; - then { - span_lint_and_sugg( - cx, - IMPRECISE_FLOPS, - expr.span, - "(e.pow(x) - 1) can be computed more accurately", - "consider using", - format!( - "{}.exp_m1()", - Sugg::hir(cx, self_arg, "..").maybe_par() - ), - Applicability::MachineApplicable, - ); - } + if let ExprKind::Binary( + Spanned { + node: BinOpKind::Sub, .. + }, + lhs, + rhs, + ) = expr.kind + && cx.typeck_results().expr_ty(lhs).is_floating_point() + && let Some(value) = constant(cx, cx.typeck_results(), rhs) + && (F32(1.0) == value || F64(1.0) == value) + && let ExprKind::MethodCall(path, self_arg, ..) = &lhs.kind + && cx.typeck_results().expr_ty(self_arg).is_floating_point() + && path.ident.name.as_str() == "exp" + { + span_lint_and_sugg( + cx, + IMPRECISE_FLOPS, + expr.span, + "(e.pow(x) - 1) can be computed more accurately", + "consider using", + format!("{}.exp_m1()", Sugg::hir(cx, self_arg, "..").maybe_par()), + Applicability::MachineApplicable, + ); } } fn is_float_mul_expr<'a>(cx: &LateContext<'_>, expr: &'a Expr<'a>) -> Option<(&'a Expr<'a>, &'a Expr<'a>)> { - if_chain! { - if let ExprKind::Binary(Spanned { node: BinOpKind::Mul, .. }, lhs, rhs) = &expr.kind; - if cx.typeck_results().expr_ty(lhs).is_floating_point(); - if cx.typeck_results().expr_ty(rhs).is_floating_point(); - then { - return Some((lhs, rhs)); - } + if let ExprKind::Binary( + Spanned { + node: BinOpKind::Mul, .. + }, + lhs, + rhs, + ) = &expr.kind + && cx.typeck_results().expr_ty(lhs).is_floating_point() + && cx.typeck_results().expr_ty(rhs).is_floating_point() + { + return Some((lhs, rhs)); } None @@ -473,9 +496,13 @@ fn check_mul_add(cx: &LateContext<'_>, expr: &Expr<'_>) { if let BinOpKind::Sub = op { -sugg } else { sugg } }; - let (recv, arg1, arg2) = if let Some((inner_lhs, inner_rhs)) = is_float_mul_expr(cx, lhs) { + let (recv, arg1, arg2) = if let Some((inner_lhs, inner_rhs)) = is_float_mul_expr(cx, lhs) + && cx.typeck_results().expr_ty(rhs).is_floating_point() + { (inner_lhs, Sugg::hir(cx, inner_rhs, ".."), maybe_neg_sugg(rhs)) - } else if let Some((inner_lhs, inner_rhs)) = is_float_mul_expr(cx, rhs) { + } else if let Some((inner_lhs, inner_rhs)) = is_float_mul_expr(cx, rhs) + && cx.typeck_results().expr_ty(lhs).is_floating_point() + { (inner_lhs, maybe_neg_sugg(inner_rhs), Sugg::hir(cx, lhs, "..")) } else { return; @@ -553,60 +580,72 @@ fn are_negated<'a>(cx: &LateContext<'_>, expr1: &'a Expr<'a>, expr2: &'a Expr<'a } fn check_custom_abs(cx: &LateContext<'_>, expr: &Expr<'_>) { - if_chain! { - if let Some(higher::If { cond, then, r#else: Some(r#else) }) = higher::If::hir(expr); - let if_body_expr = peel_blocks(then); - let else_body_expr = peel_blocks(r#else); - if let Some((if_expr_positive, body)) = are_negated(cx, if_body_expr, else_body_expr); - then { - let positive_abs_sugg = ( - "manual implementation of `abs` method", - format!("{}.abs()", Sugg::hir(cx, body, "..").maybe_par()), - ); - let negative_abs_sugg = ( - "manual implementation of negation of `abs` method", - format!("-{}.abs()", Sugg::hir(cx, body, "..").maybe_par()), - ); - let sugg = if is_testing_positive(cx, cond, body) { - if if_expr_positive { - positive_abs_sugg - } else { - negative_abs_sugg - } - } else if is_testing_negative(cx, cond, body) { - if if_expr_positive { - negative_abs_sugg - } else { - positive_abs_sugg - } + if let Some(higher::If { + cond, + then, + r#else: Some(r#else), + }) = higher::If::hir(expr) + && let if_body_expr = peel_blocks(then) + && let else_body_expr = peel_blocks(r#else) + && let Some((if_expr_positive, body)) = are_negated(cx, if_body_expr, else_body_expr) + { + let positive_abs_sugg = ( + "manual implementation of `abs` method", + format!("{}.abs()", Sugg::hir(cx, body, "..").maybe_par()), + ); + let negative_abs_sugg = ( + "manual implementation of negation of `abs` method", + format!("-{}.abs()", Sugg::hir(cx, body, "..").maybe_par()), + ); + let sugg = if is_testing_positive(cx, cond, body) { + if if_expr_positive { + positive_abs_sugg } else { - return; - }; - span_lint_and_sugg( - cx, - SUBOPTIMAL_FLOPS, - expr.span, - sugg.0, - "try", - sugg.1, - Applicability::MachineApplicable, - ); - } + negative_abs_sugg + } + } else if is_testing_negative(cx, cond, body) { + if if_expr_positive { + negative_abs_sugg + } else { + positive_abs_sugg + } + } else { + return; + }; + span_lint_and_sugg( + cx, + SUBOPTIMAL_FLOPS, + expr.span, + sugg.0, + "try", + sugg.1, + Applicability::MachineApplicable, + ); } } fn are_same_base_logs(cx: &LateContext<'_>, expr_a: &Expr<'_>, expr_b: &Expr<'_>) -> bool { - if_chain! { - if let ExprKind::MethodCall(PathSegment { ident: method_name_a, .. }, _, args_a, _) = expr_a.kind; - if let ExprKind::MethodCall(PathSegment { ident: method_name_b, .. }, _, args_b, _) = expr_b.kind; - then { - return method_name_a.as_str() == method_name_b.as_str() && - args_a.len() == args_b.len() && - ( - ["ln", "log2", "log10"].contains(&method_name_a.as_str()) || - method_name_a.as_str() == "log" && args_a.len() == 1 && eq_expr_value(cx, &args_a[0], &args_b[0]) - ); - } + if let ExprKind::MethodCall( + PathSegment { + ident: method_name_a, .. + }, + _, + args_a, + _, + ) = expr_a.kind + && let ExprKind::MethodCall( + PathSegment { + ident: method_name_b, .. + }, + _, + args_b, + _, + ) = expr_b.kind + { + return method_name_a.as_str() == method_name_b.as_str() + && args_a.len() == args_b.len() + && (["ln", "log2", "log10"].contains(&method_name_a.as_str()) + || method_name_a.as_str() == "log" && args_a.len() == 1 && eq_expr_value(cx, &args_a[0], &args_b[0])); } false @@ -614,103 +653,98 @@ fn are_same_base_logs(cx: &LateContext<'_>, expr_a: &Expr<'_>, expr_b: &Expr<'_> fn check_log_division(cx: &LateContext<'_>, expr: &Expr<'_>) { // check if expression of the form x.logN() / y.logN() - if_chain! { - if let ExprKind::Binary( - Spanned { - node: BinOpKind::Div, .. - }, - lhs, - rhs, - ) = &expr.kind; - if are_same_base_logs(cx, lhs, rhs); - if let ExprKind::MethodCall(_, largs_self, ..) = &lhs.kind; - if let ExprKind::MethodCall(_, rargs_self, ..) = &rhs.kind; - then { - span_lint_and_sugg( - cx, - SUBOPTIMAL_FLOPS, - expr.span, - "log base can be expressed more clearly", - "consider using", - format!("{}.log({})", Sugg::hir(cx, largs_self, "..").maybe_par(), Sugg::hir(cx, rargs_self, ".."),), - Applicability::MachineApplicable, - ); - } + if let ExprKind::Binary( + Spanned { + node: BinOpKind::Div, .. + }, + lhs, + rhs, + ) = &expr.kind + && are_same_base_logs(cx, lhs, rhs) + && let ExprKind::MethodCall(_, largs_self, ..) = &lhs.kind + && let ExprKind::MethodCall(_, rargs_self, ..) = &rhs.kind + { + span_lint_and_sugg( + cx, + SUBOPTIMAL_FLOPS, + expr.span, + "log base can be expressed more clearly", + "consider using", + format!( + "{}.log({})", + Sugg::hir(cx, largs_self, "..").maybe_par(), + Sugg::hir(cx, rargs_self, ".."), + ), + Applicability::MachineApplicable, + ); } } fn check_radians(cx: &LateContext<'_>, expr: &Expr<'_>) { - if_chain! { - if let ExprKind::Binary( - Spanned { - node: BinOpKind::Div, .. - }, - div_lhs, - div_rhs, - ) = &expr.kind; - if let ExprKind::Binary( + if let ExprKind::Binary( + Spanned { + node: BinOpKind::Div, .. + }, + div_lhs, + div_rhs, + ) = &expr.kind + && let ExprKind::Binary( Spanned { node: BinOpKind::Mul, .. }, mul_lhs, mul_rhs, - ) = &div_lhs.kind; - if let Some(rvalue) = constant(cx, cx.typeck_results(), div_rhs); - if let Some(lvalue) = constant(cx, cx.typeck_results(), mul_rhs); - then { - // TODO: also check for constant values near PI/180 or 180/PI - if (F32(f32_consts::PI) == rvalue || F64(f64_consts::PI) == rvalue) && - (F32(180_f32) == lvalue || F64(180_f64) == lvalue) + ) = &div_lhs.kind + && let Some(rvalue) = constant(cx, cx.typeck_results(), div_rhs) + && let Some(lvalue) = constant(cx, cx.typeck_results(), mul_rhs) + { + // TODO: also check for constant values near PI/180 or 180/PI + if (F32(f32_consts::PI) == rvalue || F64(f64_consts::PI) == rvalue) + && (F32(180_f32) == lvalue || F64(180_f64) == lvalue) + { + let mut proposal = format!("{}.to_degrees()", Sugg::hir(cx, mul_lhs, "..").maybe_par()); + if let ExprKind::Lit(literal) = mul_lhs.kind + && let ast::LitKind::Float(ref value, float_type) = literal.node + && float_type == ast::LitFloatType::Unsuffixed { - let mut proposal = format!("{}.to_degrees()", Sugg::hir(cx, mul_lhs, "..").maybe_par()); - if_chain! { - if let ExprKind::Lit(literal) = mul_lhs.kind; - if let ast::LitKind::Float(ref value, float_type) = literal.node; - if float_type == ast::LitFloatType::Unsuffixed; - then { - if value.as_str().ends_with('.') { - proposal = format!("{}0_f64.to_degrees()", Sugg::hir(cx, mul_lhs, "..")); - } else { - proposal = format!("{}_f64.to_degrees()", Sugg::hir(cx, mul_lhs, "..")); - } - } + if value.as_str().ends_with('.') { + proposal = format!("{}0_f64.to_degrees()", Sugg::hir(cx, mul_lhs, "..")); + } else { + proposal = format!("{}_f64.to_degrees()", Sugg::hir(cx, mul_lhs, "..")); } - span_lint_and_sugg( - cx, - SUBOPTIMAL_FLOPS, - expr.span, - "conversion to degrees can be done more accurately", - "consider using", - proposal, - Applicability::MachineApplicable, - ); - } else if - (F32(180_f32) == rvalue || F64(180_f64) == rvalue) && - (F32(f32_consts::PI) == lvalue || F64(f64_consts::PI) == lvalue) + } + span_lint_and_sugg( + cx, + SUBOPTIMAL_FLOPS, + expr.span, + "conversion to degrees can be done more accurately", + "consider using", + proposal, + Applicability::MachineApplicable, + ); + } else if (F32(180_f32) == rvalue || F64(180_f64) == rvalue) + && (F32(f32_consts::PI) == lvalue || F64(f64_consts::PI) == lvalue) + { + let mut proposal = format!("{}.to_radians()", Sugg::hir(cx, mul_lhs, "..").maybe_par()); + if let ExprKind::Lit(literal) = mul_lhs.kind + && let ast::LitKind::Float(ref value, float_type) = literal.node + && float_type == ast::LitFloatType::Unsuffixed { - let mut proposal = format!("{}.to_radians()", Sugg::hir(cx, mul_lhs, "..").maybe_par()); - if_chain! { - if let ExprKind::Lit(literal) = mul_lhs.kind; - if let ast::LitKind::Float(ref value, float_type) = literal.node; - if float_type == ast::LitFloatType::Unsuffixed; - then { - if value.as_str().ends_with('.') { - proposal = format!("{}0_f64.to_radians()", Sugg::hir(cx, mul_lhs, "..")); - } else { - proposal = format!("{}_f64.to_radians()", Sugg::hir(cx, mul_lhs, "..")); - } - } + if value.as_str().ends_with('.') { + proposal = format!("{}0_f64.to_radians()", Sugg::hir(cx, mul_lhs, "..")); + } else { + proposal = format!("{}_f64.to_radians()", Sugg::hir(cx, mul_lhs, "..")); } - span_lint_and_sugg( - cx, - SUBOPTIMAL_FLOPS, - expr.span, - "conversion to radians can be done more accurately", - "consider using", - proposal, - Applicability::MachineApplicable, - ); } + span_lint_and_sugg( + cx, + SUBOPTIMAL_FLOPS, + expr.span, + "conversion to radians can be done more accurately", + "consider using", + proposal, + Applicability::MachineApplicable, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/format.rs b/src/tools/clippy/clippy_lints/src/format.rs index 18ed05c1c..8a0cd155d 100644 --- a/src/tools/clippy/clippy_lints/src/format.rs +++ b/src/tools/clippy/clippy_lints/src/format.rs @@ -7,7 +7,7 @@ use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::{sym, Span}; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/format_args.rs b/src/tools/clippy/clippy_lints/src/format_args.rs index 3c1f2d9d5..8af321e4d 100644 --- a/src/tools/clippy/clippy_lints/src/format_args.rs +++ b/src/tools/clippy/clippy_lints/src/format_args.rs @@ -8,7 +8,6 @@ use clippy_utils::macros::{ }; use clippy_utils::source::snippet_opt; use clippy_utils::ty::{implements_trait, is_type_lang_item}; -use if_chain::if_chain; use itertools::Itertools; use rustc_ast::{ FormatArgPosition, FormatArgPositionKind, FormatArgsPiece, FormatArgumentKind, FormatCount, FormatOptions, @@ -20,7 +19,7 @@ use rustc_hir::{Expr, ExprKind, LangItem}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::ty::adjustment::{Adjust, Adjustment}; use rustc_middle::ty::Ty; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::def_id::DefId; use rustc_span::edition::Edition::Edition2021; use rustc_span::{sym, Span, Symbol}; @@ -404,49 +403,43 @@ fn check_format_in_format_args(cx: &LateContext<'_>, call_site: Span, name: Symb } fn check_to_string_in_format_args(cx: &LateContext<'_>, name: Symbol, value: &Expr<'_>) { - if_chain! { - if !value.span.from_expansion(); - if let ExprKind::MethodCall(_, receiver, [], to_string_span) = value.kind; - if let Some(method_def_id) = cx.typeck_results().type_dependent_def_id(value.hir_id); - if is_diag_trait_item(cx, method_def_id, sym::ToString); - let receiver_ty = cx.typeck_results().expr_ty(receiver); - if let Some(display_trait_id) = cx.tcx.get_diagnostic_item(sym::Display); - let (n_needed_derefs, target) = - count_needed_derefs(receiver_ty, cx.typeck_results().expr_adjustments(receiver).iter()); - if implements_trait(cx, target, display_trait_id, &[]); - if let Some(sized_trait_id) = cx.tcx.lang_items().sized_trait(); - if let Some(receiver_snippet) = snippet_opt(cx, receiver.span); - then { - let needs_ref = !implements_trait(cx, receiver_ty, sized_trait_id, &[]); - if n_needed_derefs == 0 && !needs_ref { - span_lint_and_sugg( - cx, - TO_STRING_IN_FORMAT_ARGS, - to_string_span.with_lo(receiver.span.hi()), - &format!( - "`to_string` applied to a type that implements `Display` in `{name}!` args" - ), - "remove this", - String::new(), - Applicability::MachineApplicable, - ); - } else { - span_lint_and_sugg( - cx, - TO_STRING_IN_FORMAT_ARGS, - value.span, - &format!( - "`to_string` applied to a type that implements `Display` in `{name}!` args" - ), - "use this", - format!( - "{}{:*>n_needed_derefs$}{receiver_snippet}", - if needs_ref { "&" } else { "" }, - "" - ), - Applicability::MachineApplicable, - ); - } + if !value.span.from_expansion() + && let ExprKind::MethodCall(_, receiver, [], to_string_span) = value.kind + && let Some(method_def_id) = cx.typeck_results().type_dependent_def_id(value.hir_id) + && is_diag_trait_item(cx, method_def_id, sym::ToString) + && let receiver_ty = cx.typeck_results().expr_ty(receiver) + && let Some(display_trait_id) = cx.tcx.get_diagnostic_item(sym::Display) + && let (n_needed_derefs, target) = + count_needed_derefs(receiver_ty, cx.typeck_results().expr_adjustments(receiver).iter()) + && implements_trait(cx, target, display_trait_id, &[]) + && let Some(sized_trait_id) = cx.tcx.lang_items().sized_trait() + && let Some(receiver_snippet) = snippet_opt(cx, receiver.span) + { + let needs_ref = !implements_trait(cx, receiver_ty, sized_trait_id, &[]); + if n_needed_derefs == 0 && !needs_ref { + span_lint_and_sugg( + cx, + TO_STRING_IN_FORMAT_ARGS, + to_string_span.with_lo(receiver.span.hi()), + &format!("`to_string` applied to a type that implements `Display` in `{name}!` args"), + "remove this", + String::new(), + Applicability::MachineApplicable, + ); + } else { + span_lint_and_sugg( + cx, + TO_STRING_IN_FORMAT_ARGS, + value.span, + &format!("`to_string` applied to a type that implements `Display` in `{name}!` args"), + "use this", + format!( + "{}{:*>n_needed_derefs$}{receiver_snippet}", + if needs_ref { "&" } else { "" }, + "" + ), + Applicability::MachineApplicable, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/format_impl.rs b/src/tools/clippy/clippy_lints/src/format_impl.rs index 08ee7032c..9360eb1fa 100644 --- a/src/tools/clippy/clippy_lints/src/format_impl.rs +++ b/src/tools/clippy/clippy_lints/src/format_impl.rs @@ -1,12 +1,11 @@ use clippy_utils::diagnostics::{span_lint, span_lint_and_sugg}; use clippy_utils::macros::{find_format_arg_expr, find_format_args, is_format_macro, root_macro_call_first_node}; use clippy_utils::{get_parent_as_impl, is_diag_trait_item, path_to_local, peel_ref_operators}; -use if_chain::if_chain; use rustc_ast::{FormatArgsPiece, FormatTrait}; use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind, Impl, ImplItem, ImplItemKind, QPath}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::symbol::kw; use rustc_span::{sym, Span, Symbol}; @@ -141,27 +140,25 @@ impl<'tcx> LateLintPass<'tcx> for FormatImpl { } fn check_to_string_in_display(cx: &LateContext<'_>, expr: &Expr<'_>) { - if_chain! { + if let ExprKind::MethodCall(path, self_arg, ..) = expr.kind // Get the hir_id of the object we are calling the method on - if let ExprKind::MethodCall(path, self_arg, ..) = expr.kind; // Is the method to_string() ? - if path.ident.name == sym::to_string; + && path.ident.name == sym::to_string // Is the method a part of the ToString trait? (i.e. not to_string() implemented // separately) - if let Some(expr_def_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id); - if is_diag_trait_item(cx, expr_def_id, sym::ToString); + && let Some(expr_def_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id) + && is_diag_trait_item(cx, expr_def_id, sym::ToString) // Is the method is called on self - if let ExprKind::Path(QPath::Resolved(_, path)) = self_arg.kind; - if let [segment] = path.segments; - if segment.ident.name == kw::SelfLower; - then { - span_lint( - cx, - RECURSIVE_FORMAT_IMPL, - expr.span, - "using `self.to_string` in `fmt::Display` implementation will cause infinite recursion", - ); - } + && let ExprKind::Path(QPath::Resolved(_, path)) = self_arg.kind + && let [segment] = path.segments + && segment.ident.name == kw::SelfLower + { + span_lint( + cx, + RECURSIVE_FORMAT_IMPL, + expr.span, + "using `self.to_string` in `fmt::Display` implementation will cause infinite recursion", + ); } } @@ -215,55 +212,53 @@ fn check_format_arg_self(cx: &LateContext<'_>, span: Span, arg: &Expr<'_>, impl_ } fn check_print_in_format_impl(cx: &LateContext<'_>, expr: &Expr<'_>, impl_trait: FormatTraitNames) { - if_chain! { - if let Some(macro_call) = root_macro_call_first_node(cx, expr); - if let Some(name) = cx.tcx.get_diagnostic_name(macro_call.def_id); - then { - let replacement = match name { - sym::print_macro | sym::eprint_macro => "write", - sym::println_macro | sym::eprintln_macro => "writeln", - _ => return, - }; + if let Some(macro_call) = root_macro_call_first_node(cx, expr) + && let Some(name) = cx.tcx.get_diagnostic_name(macro_call.def_id) + { + let replacement = match name { + sym::print_macro | sym::eprint_macro => "write", + sym::println_macro | sym::eprintln_macro => "writeln", + _ => return, + }; - let name = name.as_str().strip_suffix("_macro").unwrap(); + let name = name.as_str().strip_suffix("_macro").unwrap(); - span_lint_and_sugg( - cx, - PRINT_IN_FORMAT_IMPL, - macro_call.span, - &format!("use of `{name}!` in `{}` impl", impl_trait.name), - "replace with", - if let Some(formatter_name) = impl_trait.formatter_name { - format!("{replacement}!({formatter_name}, ..)") - } else { - format!("{replacement}!(..)") - }, - Applicability::HasPlaceholders, - ); - } + span_lint_and_sugg( + cx, + PRINT_IN_FORMAT_IMPL, + macro_call.span, + &format!("use of `{name}!` in `{}` impl", impl_trait.name), + "replace with", + if let Some(formatter_name) = impl_trait.formatter_name { + format!("{replacement}!({formatter_name}, ..)") + } else { + format!("{replacement}!(..)") + }, + Applicability::HasPlaceholders, + ); } } fn is_format_trait_impl(cx: &LateContext<'_>, impl_item: &ImplItem<'_>) -> Option<FormatTraitNames> { - if_chain! { - if impl_item.ident.name == sym::fmt; - if let ImplItemKind::Fn(_, body_id) = impl_item.kind; - if let Some(Impl { of_trait: Some(trait_ref),..}) = get_parent_as_impl(cx.tcx, impl_item.hir_id()); - if let Some(did) = trait_ref.trait_def_id(); - if let Some(name) = cx.tcx.get_diagnostic_name(did); - if matches!(name, sym::Debug | sym::Display); - then { - let body = cx.tcx.hir().body(body_id); - let formatter_name = body.params.get(1) - .and_then(|param| param.pat.simple_ident()) - .map(|ident| ident.name); + if impl_item.ident.name == sym::fmt + && let ImplItemKind::Fn(_, body_id) = impl_item.kind + && let Some(Impl { + of_trait: Some(trait_ref), + .. + }) = get_parent_as_impl(cx.tcx, impl_item.hir_id()) + && let Some(did) = trait_ref.trait_def_id() + && let Some(name) = cx.tcx.get_diagnostic_name(did) + && matches!(name, sym::Debug | sym::Display) + { + let body = cx.tcx.hir().body(body_id); + let formatter_name = body + .params + .get(1) + .and_then(|param| param.pat.simple_ident()) + .map(|ident| ident.name); - Some(FormatTraitNames { - name, - formatter_name, - }) - } else { - None - } + Some(FormatTraitNames { name, formatter_name }) + } else { + None } } diff --git a/src/tools/clippy/clippy_lints/src/format_push_string.rs b/src/tools/clippy/clippy_lints/src/format_push_string.rs index ac45f5aed..3901dd984 100644 --- a/src/tools/clippy/clippy_lints/src/format_push_string.rs +++ b/src/tools/clippy/clippy_lints/src/format_push_string.rs @@ -3,7 +3,7 @@ use clippy_utils::ty::is_type_lang_item; use clippy_utils::{higher, match_def_path, paths}; use rustc_hir::{BinOpKind, Expr, ExprKind, LangItem, MatchSource}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/formatting.rs b/src/tools/clippy/clippy_lints/src/formatting.rs index 2c9c43d3e..c3ef6f180 100644 --- a/src/tools/clippy/clippy_lints/src/formatting.rs +++ b/src/tools/clippy/clippy_lints/src/formatting.rs @@ -1,11 +1,10 @@ use clippy_utils::diagnostics::{span_lint_and_help, span_lint_and_note}; use clippy_utils::is_span_if; use clippy_utils::source::snippet_opt; -use if_chain::if_chain; -use rustc_ast::ast::{BinOpKind, Block, Expr, ExprKind, StmtKind, UnOp}; +use rustc_ast::ast::{BinOpKind, Block, Expr, ExprKind, StmtKind}; use rustc_lint::{EarlyContext, EarlyLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::Span; declare_clippy_lint! { @@ -145,7 +144,7 @@ fn check_assign(cx: &EarlyContext<'_>, expr: &Expr) { let eq_span = lhs.span.between(rhs.span); if let ExprKind::Unary(op, ref sub_rhs) = rhs.kind { if let Some(eq_snippet) = snippet_opt(cx, eq_span) { - let op = UnOp::to_string(op); + let op = op.as_str(); let eqop_span = lhs.span.between(sub_rhs.span); if eq_snippet.ends_with('=') { span_lint_and_note( @@ -168,93 +167,84 @@ fn check_assign(cx: &EarlyContext<'_>, expr: &Expr) { /// Implementation of the `SUSPICIOUS_UNARY_OP_FORMATTING` lint. fn check_unop(cx: &EarlyContext<'_>, expr: &Expr) { - if_chain! { - if let ExprKind::Binary(ref binop, ref lhs, ref rhs) = expr.kind; - if !lhs.span.from_expansion() && !rhs.span.from_expansion(); + if let ExprKind::Binary(ref binop, ref lhs, ref rhs) = expr.kind + && !lhs.span.from_expansion() && !rhs.span.from_expansion() // span between BinOp LHS and RHS - let binop_span = lhs.span.between(rhs.span); + && let binop_span = lhs.span.between(rhs.span) // if RHS is an UnOp - if let ExprKind::Unary(op, ref un_rhs) = rhs.kind; + && let ExprKind::Unary(op, ref un_rhs) = rhs.kind // from UnOp operator to UnOp operand - let unop_operand_span = rhs.span.until(un_rhs.span); - if let Some(binop_snippet) = snippet_opt(cx, binop_span); - if let Some(unop_operand_snippet) = snippet_opt(cx, unop_operand_span); - let binop_str = BinOpKind::to_string(&binop.node); + && let unop_operand_span = rhs.span.until(un_rhs.span) + && let Some(binop_snippet) = snippet_opt(cx, binop_span) + && let Some(unop_operand_snippet) = snippet_opt(cx, unop_operand_span) + && let binop_str = binop.node.as_str() // no space after BinOp operator and space after UnOp operator - if binop_snippet.ends_with(binop_str) && unop_operand_snippet.ends_with(' '); - then { - let unop_str = UnOp::to_string(op); - let eqop_span = lhs.span.between(un_rhs.span); - span_lint_and_help( - cx, - SUSPICIOUS_UNARY_OP_FORMATTING, - eqop_span, - &format!( - "by not having a space between `{binop_str}` and `{unop_str}` it looks like \ - `{binop_str}{unop_str}` is a single operator" - ), - None, - &format!( - "put a space between `{binop_str}` and `{unop_str}` and remove the space after `{unop_str}`" - ), - ); - } + && binop_snippet.ends_with(binop_str) && unop_operand_snippet.ends_with(' ') + { + let unop_str = op.as_str(); + let eqop_span = lhs.span.between(un_rhs.span); + span_lint_and_help( + cx, + SUSPICIOUS_UNARY_OP_FORMATTING, + eqop_span, + &format!( + "by not having a space between `{binop_str}` and `{unop_str}` it looks like \ + `{binop_str}{unop_str}` is a single operator" + ), + None, + &format!("put a space between `{binop_str}` and `{unop_str}` and remove the space after `{unop_str}`"), + ); } } /// Implementation of the `SUSPICIOUS_ELSE_FORMATTING` lint for weird `else`. fn check_else(cx: &EarlyContext<'_>, expr: &Expr) { - if_chain! { - if let ExprKind::If(_, then, Some(else_)) = &expr.kind; - if is_block(else_) || is_if(else_); - if !then.span.from_expansion() && !else_.span.from_expansion(); - if !in_external_macro(cx.sess(), expr.span); + if let ExprKind::If(_, then, Some(else_)) = &expr.kind + && (is_block(else_) || is_if(else_)) + && !then.span.from_expansion() && !else_.span.from_expansion() + && !in_external_macro(cx.sess(), expr.span) // workaround for rust-lang/rust#43081 - if expr.span.lo().0 != 0 && expr.span.hi().0 != 0; + && expr.span.lo().0 != 0 && expr.span.hi().0 != 0 // this will be a span from the closing ‘}’ of the “then” block (excluding) to // the “if” of the “else if” block (excluding) - let else_span = then.span.between(else_.span); + && let else_span = then.span.between(else_.span) // the snippet should look like " else \n " with maybe comments anywhere // it’s bad when there is a ‘\n’ after the “else” - if let Some(else_snippet) = snippet_opt(cx, else_span); - if let Some((pre_else, post_else)) = else_snippet.split_once("else"); - if let Some((_, post_else_post_eol)) = post_else.split_once('\n'); - - then { - // Allow allman style braces `} \n else \n {` - if_chain! { - if is_block(else_); - if let Some((_, pre_else_post_eol)) = pre_else.split_once('\n'); - // Exactly one eol before and after the else - if !pre_else_post_eol.contains('\n'); - if !post_else_post_eol.contains('\n'); - then { - return; - } - } - - // Don't warn if the only thing inside post_else_post_eol is a comment block. - let trimmed_post_else_post_eol = post_else_post_eol.trim(); - if trimmed_post_else_post_eol.starts_with("/*") && trimmed_post_else_post_eol.ends_with("*/") { - return - } + && let Some(else_snippet) = snippet_opt(cx, else_span) + && let Some((pre_else, post_else)) = else_snippet.split_once("else") + && let Some((_, post_else_post_eol)) = post_else.split_once('\n') + { + // Allow allman style braces `} \n else \n {` + if is_block(else_) + && let Some((_, pre_else_post_eol)) = pre_else.split_once('\n') + // Exactly one eol before and after the else + && !pre_else_post_eol.contains('\n') + && !post_else_post_eol.contains('\n') + { + return; + } - let else_desc = if is_if(else_) { "if" } else { "{..}" }; - span_lint_and_note( - cx, - SUSPICIOUS_ELSE_FORMATTING, - else_span, - &format!("this is an `else {else_desc}` but the formatting might hide it"), - None, - &format!( - "to remove this lint, remove the `else` or remove the new line between \ - `else` and `{else_desc}`", - ), - ); + // Don't warn if the only thing inside post_else_post_eol is a comment block. + let trimmed_post_else_post_eol = post_else_post_eol.trim(); + if trimmed_post_else_post_eol.starts_with("/*") && trimmed_post_else_post_eol.ends_with("*/") { + return; } + + let else_desc = if is_if(else_) { "if" } else { "{..}" }; + span_lint_and_note( + cx, + SUSPICIOUS_ELSE_FORMATTING, + else_span, + &format!("this is an `else {else_desc}` but the formatting might hide it"), + None, + &format!( + "to remove this lint, remove the `else` or remove the new line between \ + `else` and `{else_desc}`", + ), + ); } } @@ -272,61 +262,56 @@ fn indentation(cx: &EarlyContext<'_>, span: Span) -> usize { fn check_array(cx: &EarlyContext<'_>, expr: &Expr) { if let ExprKind::Array(ref array) = expr.kind { for element in array { - if_chain! { - if let ExprKind::Binary(ref op, ref lhs, _) = element.kind; - if has_unary_equivalent(op.node) && lhs.span.eq_ctxt(op.span); - let space_span = lhs.span.between(op.span); - if let Some(space_snippet) = snippet_opt(cx, space_span); - let lint_span = lhs.span.with_lo(lhs.span.hi()); - if space_snippet.contains('\n'); - if indentation(cx, op.span) <= indentation(cx, lhs.span); - then { - span_lint_and_note( - cx, - POSSIBLE_MISSING_COMMA, - lint_span, - "possibly missing a comma here", - None, - "to remove this lint, add a comma or write the expr in a single line", - ); - } + if let ExprKind::Binary(ref op, ref lhs, _) = element.kind + && has_unary_equivalent(op.node) + && lhs.span.eq_ctxt(op.span) + && let space_span = lhs.span.between(op.span) + && let Some(space_snippet) = snippet_opt(cx, space_span) + && let lint_span = lhs.span.with_lo(lhs.span.hi()) + && space_snippet.contains('\n') + && indentation(cx, op.span) <= indentation(cx, lhs.span) + { + span_lint_and_note( + cx, + POSSIBLE_MISSING_COMMA, + lint_span, + "possibly missing a comma here", + None, + "to remove this lint, add a comma or write the expr in a single line", + ); } } } } fn check_missing_else(cx: &EarlyContext<'_>, first: &Expr, second: &Expr) { - if_chain! { - if !first.span.from_expansion() && !second.span.from_expansion(); - if matches!(first.kind, ExprKind::If(..)); - if is_block(second) || is_if(second); + if !first.span.from_expansion() && !second.span.from_expansion() + && matches!(first.kind, ExprKind::If(..)) + && (is_block(second) || is_if(second)) // Proc-macros can give weird spans. Make sure this is actually an `if`. - if is_span_if(cx, first.span); + && is_span_if(cx, first.span) // If there is a line break between the two expressions, don't lint. // If there is a non-whitespace character, this span came from a proc-macro. - let else_span = first.span.between(second.span); - if let Some(else_snippet) = snippet_opt(cx, else_span); - if !else_snippet.chars().any(|c| c == '\n' || !c.is_whitespace()); - then { - let (looks_like, next_thing) = if is_if(second) { - ("an `else if`", "the second `if`") - } else { - ("an `else {..}`", "the next block") - }; + && let else_span = first.span.between(second.span) + && let Some(else_snippet) = snippet_opt(cx, else_span) + && !else_snippet.chars().any(|c| c == '\n' || !c.is_whitespace()) + { + let (looks_like, next_thing) = if is_if(second) { + ("an `else if`", "the second `if`") + } else { + ("an `else {..}`", "the next block") + }; - span_lint_and_note( - cx, - SUSPICIOUS_ELSE_FORMATTING, - else_span, - &format!("this looks like {looks_like} but the `else` is missing"), - None, - &format!( - "to remove this lint, add the missing `else` or add a new line before {next_thing}", - ), - ); - } + span_lint_and_note( + cx, + SUSPICIOUS_ELSE_FORMATTING, + else_span, + &format!("this looks like {looks_like} but the `else` is missing"), + None, + &format!("to remove this lint, add the missing `else` or add a new line before {next_thing}",), + ); } } diff --git a/src/tools/clippy/clippy_lints/src/four_forward_slashes.rs b/src/tools/clippy/clippy_lints/src/four_forward_slashes.rs index 69bc0b726..0599e08e6 100644 --- a/src/tools/clippy/clippy_lints/src/four_forward_slashes.rs +++ b/src/tools/clippy/clippy_lints/src/four_forward_slashes.rs @@ -2,7 +2,7 @@ use clippy_utils::diagnostics::span_lint_and_then; use rustc_errors::Applicability; use rustc_hir::Item; use rustc_lint::{LateContext, LateLintPass, LintContext}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::Span; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/from_over_into.rs b/src/tools/clippy/clippy_lints/src/from_over_into.rs index 5477532bb..fa1f98ba0 100644 --- a/src/tools/clippy/clippy_lints/src/from_over_into.rs +++ b/src/tools/clippy/clippy_lints/src/from_over_into.rs @@ -12,7 +12,7 @@ use rustc_hir::{ use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::hir::nested_filter::OnlyBodies; use rustc_middle::ty; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::symbol::{kw, sym}; use rustc_span::{Span, Symbol}; diff --git a/src/tools/clippy/clippy_lints/src/from_raw_with_void_ptr.rs b/src/tools/clippy/clippy_lints/src/from_raw_with_void_ptr.rs index d9138d48b..c8d10dc4b 100644 --- a/src/tools/clippy/clippy_lints/src/from_raw_with_void_ptr.rs +++ b/src/tools/clippy/clippy_lints/src/from_raw_with_void_ptr.rs @@ -5,7 +5,7 @@ use rustc_hir::def_id::DefId; use rustc_hir::{Expr, ExprKind, QPath}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::{RawPtr, TypeAndMut}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/from_str_radix_10.rs b/src/tools/clippy/clippy_lints/src/from_str_radix_10.rs index 74a60b6a0..633ed96d6 100644 --- a/src/tools/clippy/clippy_lints/src/from_str_radix_10.rs +++ b/src/tools/clippy/clippy_lints/src/from_str_radix_10.rs @@ -2,12 +2,11 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::is_integer_literal; use clippy_utils::sugg::Sugg; use clippy_utils::ty::{is_type_diagnostic_item, is_type_lang_item}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{def, Expr, ExprKind, LangItem, PrimTy, QPath, TyKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::Ty; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::symbol::sym; declare_clippy_lint! { @@ -46,52 +45,41 @@ declare_lint_pass!(FromStrRadix10 => [FROM_STR_RADIX_10]); impl<'tcx> LateLintPass<'tcx> for FromStrRadix10 { fn check_expr(&mut self, cx: &LateContext<'tcx>, exp: &Expr<'tcx>) { - if_chain! { - if let ExprKind::Call(maybe_path, [src, radix]) = &exp.kind; - if let ExprKind::Path(QPath::TypeRelative(ty, pathseg)) = &maybe_path.kind; + if let ExprKind::Call(maybe_path, [src, radix]) = &exp.kind + && let ExprKind::Path(QPath::TypeRelative(ty, pathseg)) = &maybe_path.kind // check if the first part of the path is some integer primitive - if let TyKind::Path(ty_qpath) = &ty.kind; - let ty_res = cx.qpath_res(ty_qpath, ty.hir_id); - if let def::Res::PrimTy(prim_ty) = ty_res; - if matches!(prim_ty, PrimTy::Int(_) | PrimTy::Uint(_)); + && let TyKind::Path(ty_qpath) = &ty.kind + && let ty_res = cx.qpath_res(ty_qpath, ty.hir_id) + && let def::Res::PrimTy(prim_ty) = ty_res + && matches!(prim_ty, PrimTy::Int(_) | PrimTy::Uint(_)) // check if the second part of the path indeed calls the associated // function `from_str_radix` - if pathseg.ident.name.as_str() == "from_str_radix"; + && pathseg.ident.name.as_str() == "from_str_radix" // check if the second argument is a primitive `10` - if is_integer_literal(radix, 10); + && is_integer_literal(radix, 10) + { + let expr = if let ExprKind::AddrOf(_, _, expr) = &src.kind { + let ty = cx.typeck_results().expr_ty(expr); + if is_ty_stringish(cx, ty) { expr } else { &src } + } else { + &src + }; - then { - let expr = if let ExprKind::AddrOf(_, _, expr) = &src.kind { - let ty = cx.typeck_results().expr_ty(expr); - if is_ty_stringish(cx, ty) { - expr - } else { - &src - } - } else { - &src - }; + let sugg = + Sugg::hir_with_applicability(cx, expr, "<string>", &mut Applicability::MachineApplicable).maybe_par(); - let sugg = Sugg::hir_with_applicability( - cx, - expr, - "<string>", - &mut Applicability::MachineApplicable - ).maybe_par(); - - span_lint_and_sugg( - cx, - FROM_STR_RADIX_10, - exp.span, - "this call to `from_str_radix` can be replaced with a call to `str::parse`", - "try", - format!("{sugg}.parse::<{}>()", prim_ty.name_str()), - Applicability::MaybeIncorrect - ); - } + span_lint_and_sugg( + cx, + FROM_STR_RADIX_10, + exp.span, + "this call to `from_str_radix` can be replaced with a call to `str::parse`", + "try", + format!("{sugg}.parse::<{}>()", prim_ty.name_str()), + Applicability::MaybeIncorrect, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/functions/impl_trait_in_params.rs b/src/tools/clippy/clippy_lints/src/functions/impl_trait_in_params.rs index ee66c841e..8fba41c0e 100644 --- a/src/tools/clippy/clippy_lints/src/functions/impl_trait_in_params.rs +++ b/src/tools/clippy/clippy_lints/src/functions/impl_trait_in_params.rs @@ -5,18 +5,10 @@ use rustc_hir as hir; use rustc_hir::intravisit::FnKind; use rustc_hir::{Body, GenericParam, Generics, HirId, ImplItem, ImplItemKind, TraitItem, TraitItemKind}; use rustc_lint::LateContext; -use rustc_span::symbol::Ident; -use rustc_span::{BytePos, Span}; use super::IMPL_TRAIT_IN_PARAMS; -fn report( - cx: &LateContext<'_>, - param: &GenericParam<'_>, - ident: &Ident, - generics: &Generics<'_>, - first_param_span: Span, -) { +fn report(cx: &LateContext<'_>, param: &GenericParam<'_>, generics: &Generics<'_>) { // No generics with nested generics, and no generics like FnMut(x) span_lint_and_then( cx, @@ -35,12 +27,7 @@ fn report( ); } else { diag.span_suggestion_with_style( - Span::new( - first_param_span.lo() - rustc_span::BytePos(1), - ident.span.hi(), - ident.span.ctxt(), - ident.span.parent(), - ), + generics.span, "add a type parameter", format!("<{{ /* Generic name */ }}: {}>", ¶m.name.ident().as_str()[5..]), rustc_errors::Applicability::HasPlaceholders, @@ -52,54 +39,47 @@ fn report( } pub(super) fn check_fn<'tcx>(cx: &LateContext<'_>, kind: &'tcx FnKind<'_>, body: &'tcx Body<'_>, hir_id: HirId) { - if_chain! { - if let FnKind::ItemFn(ident, generics, _) = kind; - if cx.tcx.visibility(cx.tcx.hir().body_owner_def_id(body.id())).is_public(); - if !is_in_test_function(cx.tcx, hir_id); - then { - for param in generics.params { - if param.is_impl_trait() { - report(cx, param, ident, generics, body.params[0].span); - }; - } + if let FnKind::ItemFn(_, generics, _) = kind + && cx.tcx.visibility(cx.tcx.hir().body_owner_def_id(body.id())).is_public() + && !is_in_test_function(cx.tcx, hir_id) + { + for param in generics.params { + if param.is_impl_trait() { + report(cx, param, generics); + }; } } } pub(super) fn check_impl_item(cx: &LateContext<'_>, impl_item: &ImplItem<'_>) { - if_chain! { - if let ImplItemKind::Fn(_, body_id) = impl_item.kind; - if let hir::Node::Item(item) = cx.tcx.hir().get_parent(impl_item.hir_id()); - if let hir::ItemKind::Impl(impl_) = item.kind; - if let hir::Impl { of_trait, .. } = *impl_; - if of_trait.is_none(); - let body = cx.tcx.hir().body(body_id); - if cx.tcx.visibility(cx.tcx.hir().body_owner_def_id(body.id())).is_public(); - if !is_in_test_function(cx.tcx, impl_item.hir_id()); - then { - for param in impl_item.generics.params { - if param.is_impl_trait() { - report(cx, param, &impl_item.ident, impl_item.generics, body.params[0].span); - } + if let ImplItemKind::Fn(_, body_id) = impl_item.kind + && let hir::Node::Item(item) = cx.tcx.hir().get_parent(impl_item.hir_id()) + && let hir::ItemKind::Impl(impl_) = item.kind + && let hir::Impl { of_trait, .. } = *impl_ + && of_trait.is_none() + && let body = cx.tcx.hir().body(body_id) + && cx.tcx.visibility(cx.tcx.hir().body_owner_def_id(body.id())).is_public() + && !is_in_test_function(cx.tcx, impl_item.hir_id()) + { + for param in impl_item.generics.params { + if param.is_impl_trait() { + report(cx, param, impl_item.generics); } } } } pub(super) fn check_trait_item(cx: &LateContext<'_>, trait_item: &TraitItem<'_>, avoid_breaking_exported_api: bool) { - if_chain! { - if !avoid_breaking_exported_api; - if let TraitItemKind::Fn(_, _) = trait_item.kind; - if let hir::Node::Item(item) = cx.tcx.hir().get_parent(trait_item.hir_id()); + if !avoid_breaking_exported_api + && let TraitItemKind::Fn(_, _) = trait_item.kind + && let hir::Node::Item(item) = cx.tcx.hir().get_parent(trait_item.hir_id()) // ^^ (Will always be a trait) - if !item.vis_span.is_empty(); // Is public - if !is_in_test_function(cx.tcx, trait_item.hir_id()); - then { - for param in trait_item.generics.params { - if param.is_impl_trait() { - let sp = trait_item.ident.span.with_hi(trait_item.ident.span.hi() + BytePos(1)); - report(cx, param, &trait_item.ident, trait_item.generics, sp.shrink_to_hi()); - } + && !item.vis_span.is_empty() // Is public + && !is_in_test_function(cx.tcx, trait_item.hir_id()) + { + for param in trait_item.generics.params { + if param.is_impl_trait() { + report(cx, param, trait_item.generics); } } } diff --git a/src/tools/clippy/clippy_lints/src/functions/misnamed_getters.rs b/src/tools/clippy/clippy_lints/src/functions/misnamed_getters.rs index 18f7368da..bf96c0d62 100644 --- a/src/tools/clippy/clippy_lints/src/functions/misnamed_getters.rs +++ b/src/tools/clippy/clippy_lints/src/functions/misnamed_getters.rs @@ -43,15 +43,13 @@ pub fn check_fn(cx: &LateContext<'_>, kind: FnKind<'_>, decl: &FnDecl<'_>, body: // Body must be &(mut) <self_data>.name // self_data is not necessarily self, to also lint sub-getters, etc… - let block_expr = if_chain! { - if let ExprKind::Block(block,_) = body.value.kind; - if block.stmts.is_empty(); - if let Some(block_expr) = block.expr; - then { - block_expr - } else { - return; - } + let block_expr = if let ExprKind::Block(block, _) = body.value.kind + && block.stmts.is_empty() + && let Some(block_expr) = block.expr + { + block_expr + } else { + return; }; let expr_span = block_expr.span; @@ -61,14 +59,12 @@ pub fn check_fn(cx: &LateContext<'_>, kind: FnKind<'_>, decl: &FnDecl<'_>, body: } else { block_expr }; - let (self_data, used_ident) = if_chain! { - if let ExprKind::Field(self_data, ident) = expr.kind; - if ident.name.as_str() != name; - then { - (self_data, ident) - } else { - return; - } + let (self_data, used_ident) = if let ExprKind::Field(self_data, ident) = expr.kind + && ident.name.as_str() != name + { + (self_data, ident) + } else { + return; }; let mut used_field = None; diff --git a/src/tools/clippy/clippy_lints/src/functions/mod.rs b/src/tools/clippy/clippy_lints/src/functions/mod.rs index 3f5cceec7..96da2ec2a 100644 --- a/src/tools/clippy/clippy_lints/src/functions/mod.rs +++ b/src/tools/clippy/clippy_lints/src/functions/mod.rs @@ -9,7 +9,7 @@ mod too_many_lines; use rustc_hir as hir; use rustc_hir::intravisit; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::def_id::LocalDefId; use rustc_span::Span; @@ -407,7 +407,7 @@ impl<'tcx> LateLintPass<'tcx> for Functions { span: Span, def_id: LocalDefId, ) { - let hir_id = cx.tcx.hir().local_def_id_to_hir_id(def_id); + let hir_id = cx.tcx.local_def_id_to_hir_id(def_id); too_many_arguments::check_fn(cx, kind, decl, span, hir_id, self.too_many_arguments_threshold); too_many_lines::check_fn(cx, kind, span, body, self.too_many_lines_threshold); not_unsafe_ptr_arg_deref::check_fn(cx, kind, decl, body, def_id); diff --git a/src/tools/clippy/clippy_lints/src/functions/result.rs b/src/tools/clippy/clippy_lints/src/functions/result.rs index 485235514..f1200c2ed 100644 --- a/src/tools/clippy/clippy_lints/src/functions/result.rs +++ b/src/tools/clippy/clippy_lints/src/functions/result.rs @@ -23,7 +23,7 @@ fn result_err_ty<'tcx>( && let hir::FnRetTy::Return(hir_ty) = decl.output && let ty = cx .tcx - .erase_late_bound_regions(cx.tcx.fn_sig(id).instantiate_identity().output()) + .instantiate_bound_regions_with_erased(cx.tcx.fn_sig(id).instantiate_identity().output()) && is_type_diagnostic_item(cx, ty, sym::Result) && let ty::Adt(_, args) = ty.kind() { @@ -86,59 +86,60 @@ fn check_result_unit_err(cx: &LateContext<'_>, err_ty: Ty<'_>, fn_header_span: S } fn check_result_large_err<'tcx>(cx: &LateContext<'tcx>, err_ty: Ty<'tcx>, hir_ty_span: Span, large_err_threshold: u64) { - if_chain! { - if let Adt(adt, subst) = err_ty.kind(); - if let Some(local_def_id) = err_ty.ty_adt_def().expect("already checked this is adt").did().as_local(); - if let Some(hir::Node::Item(item)) = cx - .tcx - .hir() - .find_by_def_id(local_def_id); - if let hir::ItemKind::Enum(ref def, _) = item.kind; - then { - let variants_size = AdtVariantInfo::new(cx, *adt, subst); - if let Some((first_variant, variants)) = variants_size.split_first() - && first_variant.size >= large_err_threshold - { - span_lint_and_then( - cx, - RESULT_LARGE_ERR, - hir_ty_span, - "the `Err`-variant returned from this function is very large", - |diag| { - diag.span_label( - def.variants[first_variant.ind].span, - format!("the largest variant contains at least {} bytes", variants_size[0].size), - ); + if let Adt(adt, subst) = err_ty.kind() + && let Some(local_def_id) = err_ty + .ty_adt_def() + .expect("already checked this is adt") + .did() + .as_local() + && let Some(hir::Node::Item(item)) = cx.tcx.opt_hir_node_by_def_id(local_def_id) + && let hir::ItemKind::Enum(ref def, _) = item.kind + { + let variants_size = AdtVariantInfo::new(cx, *adt, subst); + if let Some((first_variant, variants)) = variants_size.split_first() + && first_variant.size >= large_err_threshold + { + span_lint_and_then( + cx, + RESULT_LARGE_ERR, + hir_ty_span, + "the `Err`-variant returned from this function is very large", + |diag| { + diag.span_label( + def.variants[first_variant.ind].span, + format!("the largest variant contains at least {} bytes", variants_size[0].size), + ); - for variant in variants { - if variant.size >= large_err_threshold { - let variant_def = &def.variants[variant.ind]; - diag.span_label( - variant_def.span, - format!("the variant `{}` contains at least {} bytes", variant_def.ident, variant.size), - ); - } + for variant in variants { + if variant.size >= large_err_threshold { + let variant_def = &def.variants[variant.ind]; + diag.span_label( + variant_def.span, + format!( + "the variant `{}` contains at least {} bytes", + variant_def.ident, variant.size + ), + ); } - - diag.help(format!("try reducing the size of `{err_ty}`, for example by boxing large elements or replacing it with `Box<{err_ty}>`")); } - ); - } + + diag.help(format!("try reducing the size of `{err_ty}`, for example by boxing large elements or replacing it with `Box<{err_ty}>`")); + }, + ); } - else { - let ty_size = approx_ty_size(cx, err_ty); - if ty_size >= large_err_threshold { - span_lint_and_then( - cx, - RESULT_LARGE_ERR, - hir_ty_span, - "the `Err`-variant returned from this function is very large", - |diag: &mut Diagnostic| { - diag.span_label(hir_ty_span, format!("the `Err`-variant is at least {ty_size} bytes")); - diag.help(format!("try reducing the size of `{err_ty}`, for example by boxing large elements or replacing it with `Box<{err_ty}>`")); - }, - ); - } + } else { + let ty_size = approx_ty_size(cx, err_ty); + if ty_size >= large_err_threshold { + span_lint_and_then( + cx, + RESULT_LARGE_ERR, + hir_ty_span, + "the `Err`-variant returned from this function is very large", + |diag: &mut Diagnostic| { + diag.span_label(hir_ty_span, format!("the `Err`-variant is at least {ty_size} bytes")); + diag.help(format!("try reducing the size of `{err_ty}`, for example by boxing large elements or replacing it with `Box<{err_ty}>`")); + }, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/future_not_send.rs b/src/tools/clippy/clippy_lints/src/future_not_send.rs index eee5b7540..9fb59a320 100644 --- a/src/tools/clippy/clippy_lints/src/future_not_send.rs +++ b/src/tools/clippy/clippy_lints/src/future_not_send.rs @@ -5,7 +5,7 @@ use rustc_hir::{Body, FnDecl}; use rustc_infer::infer::TyCtxtInferExt; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::{self, AliasTy, ClauseKind, PredicateKind}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::def_id::LocalDefId; use rustc_span::{sym, Span}; use rustc_trait_selection::traits::error_reporting::suggestions::TypeErrCtxtExt; @@ -62,7 +62,7 @@ impl<'tcx> LateLintPass<'tcx> for FutureNotSend { if let FnKind::Closure = kind { return; } - let ret_ty = return_ty(cx, cx.tcx.hir().local_def_id_to_hir_id(fn_def_id).expect_owner()); + let ret_ty = return_ty(cx, cx.tcx.local_def_id_to_hir_id(fn_def_id).expect_owner()); if let ty::Alias(ty::Opaque, AliasTy { def_id, args, .. }) = *ret_ty.kind() { let preds = cx.tcx.explicit_item_bounds(def_id); let mut is_future = false; diff --git a/src/tools/clippy/clippy_lints/src/if_let_mutex.rs b/src/tools/clippy/clippy_lints/src/if_let_mutex.rs index e614a8f69..5e354209c 100644 --- a/src/tools/clippy/clippy_lints/src/if_let_mutex.rs +++ b/src/tools/clippy/clippy_lints/src/if_let_mutex.rs @@ -1,12 +1,11 @@ use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::ty::is_type_diagnostic_item; use clippy_utils::{higher, SpanlessEq}; -use if_chain::if_chain; use rustc_errors::Diagnostic; use rustc_hir::intravisit::{self as visit, Visitor}; use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { @@ -127,15 +126,13 @@ impl<'tcx, 'l> ArmVisitor<'tcx, 'l> { } fn is_mutex_lock_call<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) -> Option<&'tcx Expr<'tcx>> { - if_chain! { - if let ExprKind::MethodCall(path, self_arg, ..) = &expr.kind; - if path.ident.as_str() == "lock"; - let ty = cx.typeck_results().expr_ty(self_arg).peel_refs(); - if is_type_diagnostic_item(cx, ty, sym::Mutex); - then { - Some(self_arg) - } else { - None - } + if let ExprKind::MethodCall(path, self_arg, ..) = &expr.kind + && path.ident.as_str() == "lock" + && let ty = cx.typeck_results().expr_ty(self_arg).peel_refs() + && is_type_diagnostic_item(cx, ty, sym::Mutex) + { + Some(self_arg) + } else { + None } } diff --git a/src/tools/clippy/clippy_lints/src/if_not_else.rs b/src/tools/clippy/clippy_lints/src/if_not_else.rs index cae561f78..4dc1ff837 100644 --- a/src/tools/clippy/clippy_lints/src/if_not_else.rs +++ b/src/tools/clippy/clippy_lints/src/if_not_else.rs @@ -6,7 +6,7 @@ use clippy_utils::diagnostics::span_lint_and_help; use clippy_utils::is_else_clause; use rustc_hir::{BinOpKind, Expr, ExprKind, UnOp}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/if_then_some_else_none.rs b/src/tools/clippy/clippy_lints/src/if_then_some_else_none.rs index 66c10ab22..cd6c46a71 100644 --- a/src/tools/clippy/clippy_lints/src/if_then_some_else_none.rs +++ b/src/tools/clippy/clippy_lints/src/if_then_some_else_none.rs @@ -9,7 +9,7 @@ use rustc_hir::LangItem::{OptionNone, OptionSome}; use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/ignored_unit_patterns.rs b/src/tools/clippy/clippy_lints/src/ignored_unit_patterns.rs index 76bdfb94e..0a2fd0c66 100644 --- a/src/tools/clippy/clippy_lints/src/ignored_unit_patterns.rs +++ b/src/tools/clippy/clippy_lints/src/ignored_unit_patterns.rs @@ -3,7 +3,7 @@ use hir::{Node, PatKind}; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/impl_hash_with_borrow_str_and_bytes.rs b/src/tools/clippy/clippy_lints/src/impl_hash_with_borrow_str_and_bytes.rs new file mode 100644 index 000000000..940adbae4 --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/impl_hash_with_borrow_str_and_bytes.rs @@ -0,0 +1,106 @@ +use clippy_utils::diagnostics::span_lint_and_then; +use clippy_utils::ty::implements_trait; +use rustc_hir::def::{DefKind, Res}; +use rustc_hir::{Item, ItemKind, Path, TraitRef}; +use rustc_lint::{LateContext, LateLintPass}; +use rustc_middle::ty::Ty; +use rustc_session::declare_lint_pass; +use rustc_span::symbol::sym; + +declare_clippy_lint! { + /// ### What it does + /// + /// This lint is concerned with the semantics of `Borrow` and `Hash` for a + /// type that implements all three of `Hash`, `Borrow<str>` and `Borrow<[u8]>` + /// as it is impossible to satisfy the semantics of Borrow and `Hash` for + /// both `Borrow<str>` and `Borrow<[u8]>`. + /// + /// ### Why is this bad? + /// + /// When providing implementations for `Borrow<T>`, one should consider whether the different + /// implementations should act as facets or representations of the underlying type. Generic code + /// typically uses `Borrow<T>` when it relies on the identical behavior of these additional trait + /// implementations. These traits will likely appear as additional trait bounds. + /// + /// In particular `Eq`, `Ord` and `Hash` must be equivalent for borrowed and owned values: + /// `x.borrow() == y.borrow()` should give the same result as `x == y`. + /// It follows then that the following equivalence must hold: + /// `hash(x) == hash((x as Borrow<[u8]>).borrow()) == hash((x as Borrow<str>).borrow())` + /// + /// Unfortunately it doesn't hold as `hash("abc") != hash("abc".as_bytes())`. + /// This happens because the `Hash` impl for str passes an additional `0xFF` byte to + /// the hasher to avoid collisions. For example, given the tuples `("a", "bc")`, and `("ab", "c")`, + /// the two tuples would have the same hash value if the `0xFF` byte was not added. + /// + /// ### Example + /// + /// ``` + /// use std::borrow::Borrow; + /// use std::hash::{Hash, Hasher}; + /// + /// struct ExampleType { + /// data: String + /// } + /// + /// impl Hash for ExampleType { + /// fn hash<H: Hasher>(&self, state: &mut H) { + /// self.data.hash(state); + /// } + /// } + /// + /// impl Borrow<str> for ExampleType { + /// fn borrow(&self) -> &str { + /// &self.data + /// } + /// } + /// + /// impl Borrow<[u8]> for ExampleType { + /// fn borrow(&self) -> &[u8] { + /// self.data.as_bytes() + /// } + /// } + /// ``` + /// As a consequence, hashing a `&ExampleType` and hashing the result of the two + /// borrows will result in different values. + /// + #[clippy::version = "1.76.0"] + pub IMPL_HASH_BORROW_WITH_STR_AND_BYTES, + correctness, + "ensures that the semantics of `Borrow` for `Hash` are satisfied when `Borrow<str>` and `Borrow<[u8]>` are implemented" +} + +declare_lint_pass!(ImplHashWithBorrowStrBytes => [IMPL_HASH_BORROW_WITH_STR_AND_BYTES]); + +impl LateLintPass<'_> for ImplHashWithBorrowStrBytes { + /// We are emitting this lint at the Hash impl of a type that implements all + /// three of `Hash`, `Borrow<str>` and `Borrow<[u8]>`. + fn check_item(&mut self, cx: &LateContext<'_>, item: &Item<'_>) { + if let ItemKind::Impl(imp) = item.kind + && let Some(TraitRef {path: Path {span, res, ..}, ..}) = imp.of_trait + && let ty = cx.tcx.type_of(item.owner_id).instantiate_identity() + && let Some(hash_id) = cx.tcx.get_diagnostic_item(sym::Hash) + && Res::Def(DefKind::Trait, hash_id) == *res + && let Some(borrow_id) = cx.tcx.get_diagnostic_item(sym::Borrow) + // since we are in the `Hash` impl, we don't need to check for that. + // we need only to check for `Borrow<str>` and `Borrow<[u8]>` + && implements_trait(cx, ty, borrow_id, &[cx.tcx.types.str_.into()]) + && implements_trait(cx, ty, borrow_id, &[Ty::new_slice(cx.tcx, cx.tcx.types.u8).into()]) + { + span_lint_and_then( + cx, + IMPL_HASH_BORROW_WITH_STR_AND_BYTES, + *span, + "the semantics of `Borrow<T>` around `Hash` can't be satisfied when both `Borrow<str>` and `Borrow<[u8]>` are implemented", + |diag| { + diag.note("the `Borrow` semantics require that `Hash` must behave the same for all implementations of Borrow<T>"); + diag.note( + "however, the hash implementations of a string (`str`) and the bytes of a string `[u8]` do not behave the same ..." + ); + diag.note("... as (`hash(\"abc\") != hash(\"abc\".as_bytes())`"); + diag.help("consider either removing one of the `Borrow` implementations (`Borrow<str>` or `Borrow<[u8]>`) ..."); + diag.help("... or not implementing `Hash` for this type"); + }, + ); + } + } +} diff --git a/src/tools/clippy/clippy_lints/src/implicit_hasher.rs b/src/tools/clippy/clippy_lints/src/implicit_hasher.rs index eaf80de38..43eb6a9b8 100644 --- a/src/tools/clippy/clippy_lints/src/implicit_hasher.rs +++ b/src/tools/clippy/clippy_lints/src/implicit_hasher.rs @@ -9,11 +9,9 @@ use rustc_hir_analysis::hir_ty_to_ty; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::hir::nested_filter; use rustc_middle::ty::{Ty, TypeckResults}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; -use rustc_span::Span; +use rustc_session::declare_lint_pass; use rustc_span::symbol::sym; - -use if_chain::if_chain; +use rustc_span::Span; use clippy_utils::diagnostics::{multispan_sugg, span_lint_and_then}; use clippy_utils::source::{snippet, snippet_opt}; @@ -337,42 +335,38 @@ impl<'a, 'b, 'tcx> Visitor<'tcx> for ImplicitHasherConstructorVisitor<'a, 'b, 't } fn visit_expr(&mut self, e: &'tcx Expr<'_>) { - if_chain! { - if let ExprKind::Call(fun, args) = e.kind; - if let ExprKind::Path(QPath::TypeRelative(ty, method)) = fun.kind; - if let TyKind::Path(QPath::Resolved(None, ty_path)) = ty.kind; - if let Some(ty_did) = ty_path.res.opt_def_id(); - then { - if self.target.ty() != self.maybe_typeck_results.unwrap().expr_ty(e) { - return; - } + if let ExprKind::Call(fun, args) = e.kind + && let ExprKind::Path(QPath::TypeRelative(ty, method)) = fun.kind + && let TyKind::Path(QPath::Resolved(None, ty_path)) = ty.kind + && let Some(ty_did) = ty_path.res.opt_def_id() + { + if self.target.ty() != self.maybe_typeck_results.unwrap().expr_ty(e) { + return; + } - if self.cx.tcx.is_diagnostic_item(sym::HashMap, ty_did) { - if method.ident.name == sym::new { - self.suggestions - .insert(e.span, "HashMap::default()".to_string()); - } else if method.ident.name == sym!(with_capacity) { - self.suggestions.insert( - e.span, - format!( - "HashMap::with_capacity_and_hasher({}, Default::default())", - snippet(self.cx, args[0].span, "capacity"), - ), - ); - } - } else if self.cx.tcx.is_diagnostic_item(sym::HashSet, ty_did) { - if method.ident.name == sym::new { - self.suggestions - .insert(e.span, "HashSet::default()".to_string()); - } else if method.ident.name == sym!(with_capacity) { - self.suggestions.insert( - e.span, - format!( - "HashSet::with_capacity_and_hasher({}, Default::default())", - snippet(self.cx, args[0].span, "capacity"), - ), - ); - } + if self.cx.tcx.is_diagnostic_item(sym::HashMap, ty_did) { + if method.ident.name == sym::new { + self.suggestions.insert(e.span, "HashMap::default()".to_string()); + } else if method.ident.name == sym!(with_capacity) { + self.suggestions.insert( + e.span, + format!( + "HashMap::with_capacity_and_hasher({}, Default::default())", + snippet(self.cx, args[0].span, "capacity"), + ), + ); + } + } else if self.cx.tcx.is_diagnostic_item(sym::HashSet, ty_did) { + if method.ident.name == sym::new { + self.suggestions.insert(e.span, "HashSet::default()".to_string()); + } else if method.ident.name == sym!(with_capacity) { + self.suggestions.insert( + e.span, + format!( + "HashSet::with_capacity_and_hasher({}, Default::default())", + snippet(self.cx, args[0].span, "capacity"), + ), + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/implicit_return.rs b/src/tools/clippy/clippy_lints/src/implicit_return.rs index c6bcf3ba4..d68c5c4ba 100644 --- a/src/tools/clippy/clippy_lints/src/implicit_return.rs +++ b/src/tools/clippy/clippy_lints/src/implicit_return.rs @@ -8,7 +8,7 @@ use rustc_hir::intravisit::FnKind; use rustc_hir::{Block, Body, Expr, ExprKind, FnDecl, FnRetTy, HirId}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::def_id::LocalDefId; use rustc_span::{Span, SyntaxContext}; diff --git a/src/tools/clippy/clippy_lints/src/implicit_saturating_add.rs b/src/tools/clippy/clippy_lints/src/implicit_saturating_add.rs index 24f62490f..cc74844f2 100644 --- a/src/tools/clippy/clippy_lints/src/implicit_saturating_add.rs +++ b/src/tools/clippy/clippy_lints/src/implicit_saturating_add.rs @@ -2,13 +2,12 @@ use clippy_utils::consts::{constant, Constant}; use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::get_parent_expr; use clippy_utils::source::snippet_with_context; -use if_chain::if_chain; use rustc_ast::ast::{LitIntType, LitKind}; use rustc_errors::Applicability; use rustc_hir::{BinOpKind, Block, Expr, ExprKind, Stmt, StmtKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::{Int, IntTy, Ty, Uint, UintTy}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does @@ -40,42 +39,58 @@ declare_lint_pass!(ImplicitSaturatingAdd => [IMPLICIT_SATURATING_ADD]); impl<'tcx> LateLintPass<'tcx> for ImplicitSaturatingAdd { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) { - if_chain! { - if let ExprKind::If(cond, then, None) = expr.kind; - if let ExprKind::DropTemps(expr1) = cond.kind; - if let Some((c, op_node, l)) = get_const(cx, expr1); - if let BinOpKind::Ne | BinOpKind::Lt = op_node; - if let ExprKind::Block(block, None) = then.kind; - if let Block { + if let ExprKind::If(cond, then, None) = expr.kind + && let ExprKind::DropTemps(expr1) = cond.kind + && let Some((c, op_node, l)) = get_const(cx, expr1) + && let BinOpKind::Ne | BinOpKind::Lt = op_node + && let ExprKind::Block(block, None) = then.kind + && let Block { stmts: - [Stmt - { kind: StmtKind::Expr(ex) | StmtKind::Semi(ex), .. }], - expr: None, ..} | - Block { stmts: [], expr: Some(ex), ..} = block; - if let ExprKind::AssignOp(op1, target, value) = ex.kind; - let ty = cx.typeck_results().expr_ty(target); - if Some(c) == get_int_max(ty); - let ctxt = expr.span.ctxt(); - if ex.span.ctxt() == ctxt; - if expr1.span.ctxt() == ctxt; - if clippy_utils::SpanlessEq::new(cx).eq_expr(l, target); - if BinOpKind::Add == op1.node; - if let ExprKind::Lit(lit) = value.kind; - if let LitKind::Int(1, LitIntType::Unsuffixed) = lit.node; - if block.expr.is_none(); - then { - let mut app = Applicability::MachineApplicable; - let code = snippet_with_context(cx, target.span, ctxt, "_", &mut app).0; - let sugg = if let Some(parent) = get_parent_expr(cx, expr) - && let ExprKind::If(_cond, _then, Some(else_)) = parent.kind - && else_.hir_id == expr.hir_id - { - format!("{{{code} = {code}.saturating_add(1); }}") - } else { - format!("{code} = {code}.saturating_add(1);") - }; - span_lint_and_sugg(cx, IMPLICIT_SATURATING_ADD, expr.span, "manual saturating add detected", "use instead", sugg, app); + [ + Stmt { + kind: StmtKind::Expr(ex) | StmtKind::Semi(ex), + .. + }, + ], + expr: None, + .. } + | Block { + stmts: [], + expr: Some(ex), + .. + } = block + && let ExprKind::AssignOp(op1, target, value) = ex.kind + && let ty = cx.typeck_results().expr_ty(target) + && Some(c) == get_int_max(ty) + && let ctxt = expr.span.ctxt() + && ex.span.ctxt() == ctxt + && expr1.span.ctxt() == ctxt + && clippy_utils::SpanlessEq::new(cx).eq_expr(l, target) + && BinOpKind::Add == op1.node + && let ExprKind::Lit(lit) = value.kind + && let LitKind::Int(1, LitIntType::Unsuffixed) = lit.node + && block.expr.is_none() + { + let mut app = Applicability::MachineApplicable; + let code = snippet_with_context(cx, target.span, ctxt, "_", &mut app).0; + let sugg = if let Some(parent) = get_parent_expr(cx, expr) + && let ExprKind::If(_cond, _then, Some(else_)) = parent.kind + && else_.hir_id == expr.hir_id + { + format!("{{{code} = {code}.saturating_add(1); }}") + } else { + format!("{code} = {code}.saturating_add(1);") + }; + span_lint_and_sugg( + cx, + IMPLICIT_SATURATING_ADD, + expr.span, + "manual saturating add detected", + "use instead", + sugg, + app, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/implicit_saturating_sub.rs b/src/tools/clippy/clippy_lints/src/implicit_saturating_sub.rs index 859404289..81df1a889 100644 --- a/src/tools/clippy/clippy_lints/src/implicit_saturating_sub.rs +++ b/src/tools/clippy/clippy_lints/src/implicit_saturating_sub.rs @@ -1,11 +1,10 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::{higher, is_integer_literal, peel_blocks_with_stmt, SpanlessEq}; -use if_chain::if_chain; use rustc_ast::ast::LitKind; use rustc_errors::Applicability; use rustc_hir::{BinOpKind, Expr, ExprKind, QPath}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does @@ -46,83 +45,76 @@ impl<'tcx> LateLintPass<'tcx> for ImplicitSaturatingSub { if expr.span.from_expansion() { return; } - if_chain! { - if let Some(higher::If { cond, then, r#else: None }) = higher::If::hir(expr); + if let Some(higher::If { cond, then, r#else: None }) = higher::If::hir(expr) // Check if the conditional expression is a binary operation - if let ExprKind::Binary(ref cond_op, cond_left, cond_right) = cond.kind; + && let ExprKind::Binary(ref cond_op, cond_left, cond_right) = cond.kind // Ensure that the binary operator is >, !=, or < - if BinOpKind::Ne == cond_op.node || BinOpKind::Gt == cond_op.node || BinOpKind::Lt == cond_op.node; + && (BinOpKind::Ne == cond_op.node || BinOpKind::Gt == cond_op.node || BinOpKind::Lt == cond_op.node) // Check if assign operation is done - if let Some(target) = subtracts_one(cx, then); + && let Some(target) = subtracts_one(cx, then) // Extracting out the variable name - if let ExprKind::Path(QPath::Resolved(_, ares_path)) = target.kind; - - then { - // Handle symmetric conditions in the if statement - let (cond_var, cond_num_val) = if SpanlessEq::new(cx).eq_expr(cond_left, target) { - if BinOpKind::Gt == cond_op.node || BinOpKind::Ne == cond_op.node { - (cond_left, cond_right) - } else { - return; - } - } else if SpanlessEq::new(cx).eq_expr(cond_right, target) { - if BinOpKind::Lt == cond_op.node || BinOpKind::Ne == cond_op.node { - (cond_right, cond_left) - } else { - return; - } + && let ExprKind::Path(QPath::Resolved(_, ares_path)) = target.kind + { + // Handle symmetric conditions in the if statement + let (cond_var, cond_num_val) = if SpanlessEq::new(cx).eq_expr(cond_left, target) { + if BinOpKind::Gt == cond_op.node || BinOpKind::Ne == cond_op.node { + (cond_left, cond_right) } else { return; - }; - - // Check if the variable in the condition statement is an integer - if !cx.typeck_results().expr_ty(cond_var).is_integral() { + } + } else if SpanlessEq::new(cx).eq_expr(cond_right, target) { + if BinOpKind::Lt == cond_op.node || BinOpKind::Ne == cond_op.node { + (cond_right, cond_left) + } else { return; } + } else { + return; + }; - // Get the variable name - let var_name = ares_path.segments[0].ident.name.as_str(); - match cond_num_val.kind { - ExprKind::Lit(cond_lit) => { - // Check if the constant is zero - if let LitKind::Int(0, _) = cond_lit.node { - if cx.typeck_results().expr_ty(cond_left).is_signed() { - } else { - print_lint_and_sugg(cx, var_name, expr); - }; - } - }, - ExprKind::Path(QPath::TypeRelative(_, name)) => { - if_chain! { - if name.ident.as_str() == "MIN"; - if let Some(const_id) = cx.typeck_results().type_dependent_def_id(cond_num_val.hir_id); - if let Some(impl_id) = cx.tcx.impl_of_method(const_id); - if let None = cx.tcx.impl_trait_ref(impl_id); // An inherent impl - if cx.tcx.type_of(impl_id).instantiate_identity().is_integral(); - then { - print_lint_and_sugg(cx, var_name, expr) - } - } - }, - ExprKind::Call(func, []) => { - if_chain! { - if let ExprKind::Path(QPath::TypeRelative(_, name)) = func.kind; - if name.ident.as_str() == "min_value"; - if let Some(func_id) = cx.typeck_results().type_dependent_def_id(func.hir_id); - if let Some(impl_id) = cx.tcx.impl_of_method(func_id); - if let None = cx.tcx.impl_trait_ref(impl_id); // An inherent impl - if cx.tcx.type_of(impl_id).instantiate_identity().is_integral(); - then { - print_lint_and_sugg(cx, var_name, expr) - } - } - }, - _ => (), - } + // Check if the variable in the condition statement is an integer + if !cx.typeck_results().expr_ty(cond_var).is_integral() { + return; + } + + // Get the variable name + let var_name = ares_path.segments[0].ident.name.as_str(); + match cond_num_val.kind { + ExprKind::Lit(cond_lit) => { + // Check if the constant is zero + if let LitKind::Int(0, _) = cond_lit.node { + if cx.typeck_results().expr_ty(cond_left).is_signed() { + } else { + print_lint_and_sugg(cx, var_name, expr); + }; + } + }, + ExprKind::Path(QPath::TypeRelative(_, name)) => { + if name.ident.as_str() == "MIN" + && let Some(const_id) = cx.typeck_results().type_dependent_def_id(cond_num_val.hir_id) + && let Some(impl_id) = cx.tcx.impl_of_method(const_id) + && let None = cx.tcx.impl_trait_ref(impl_id) // An inherent impl + && cx.tcx.type_of(impl_id).instantiate_identity().is_integral() + { + print_lint_and_sugg(cx, var_name, expr); + } + }, + ExprKind::Call(func, []) => { + if let ExprKind::Path(QPath::TypeRelative(_, name)) = func.kind + && name.ident.as_str() == "min_value" + && let Some(func_id) = cx.typeck_results().type_dependent_def_id(func.hir_id) + && let Some(impl_id) = cx.tcx.impl_of_method(func_id) + && let None = cx.tcx.impl_trait_ref(impl_id) // An inherent impl + && cx.tcx.type_of(impl_id).instantiate_identity().is_integral() + { + print_lint_and_sugg(cx, var_name, expr); + } + }, + _ => (), } } } @@ -135,18 +127,14 @@ fn subtracts_one<'a>(cx: &LateContext<'_>, expr: &'a Expr<'a>) -> Option<&'a Exp (BinOpKind::Sub == op1.node && is_integer_literal(value, 1)).then_some(target) }, ExprKind::Assign(target, value, _) => { - if_chain! { - if let ExprKind::Binary(ref op1, left1, right1) = value.kind; - if BinOpKind::Sub == op1.node; - - if SpanlessEq::new(cx).eq_expr(left1, target); - - if is_integer_literal(right1, 1); - then { - Some(target) - } else { - None - } + if let ExprKind::Binary(ref op1, left1, right1) = value.kind + && BinOpKind::Sub == op1.node + && SpanlessEq::new(cx).eq_expr(left1, target) + && is_integer_literal(right1, 1) + { + Some(target) + } else { + None } }, _ => None, diff --git a/src/tools/clippy/clippy_lints/src/implied_bounds_in_impls.rs b/src/tools/clippy/clippy_lints/src/implied_bounds_in_impls.rs index ff27a5d66..0f5a9ea5d 100644 --- a/src/tools/clippy/clippy_lints/src/implied_bounds_in_impls.rs +++ b/src/tools/clippy/clippy_lints/src/implied_bounds_in_impls.rs @@ -10,7 +10,7 @@ use rustc_hir::{ use rustc_hir_analysis::hir_ty_to_ty; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::{self, ClauseKind, Generics, Ty, TyCtxt}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::Span; declare_clippy_lint! { @@ -43,9 +43,9 @@ declare_clippy_lint! { /// Box::new(123) /// } /// ``` - #[clippy::version = "1.73.0"] + #[clippy::version = "1.74.0"] pub IMPLIED_BOUNDS_IN_IMPLS, - nursery, + complexity, "specifying bounds that are implied by other bounds in `impl Trait` type" } declare_lint_pass!(ImpliedBoundsInImpls => [IMPLIED_BOUNDS_IN_IMPLS]); @@ -194,6 +194,15 @@ fn is_same_generics<'tcx>( .enumerate() .skip(1) // skip `Self` implicit arg .all(|(arg_index, arg)| { + if [ + implied_by_generics.host_effect_index, + implied_generics.host_effect_index, + ] + .contains(&Some(arg_index)) + { + // skip host effect params in determining whether generics are same + return true; + } if let Some(ty) = arg.as_type() { if let &ty::Param(ty::ParamTy { index, .. }) = ty.kind() // `index == 0` means that it's referring to `Self`, diff --git a/src/tools/clippy/clippy_lints/src/inconsistent_struct_constructor.rs b/src/tools/clippy/clippy_lints/src/inconsistent_struct_constructor.rs index a84f7351a..1075975f0 100644 --- a/src/tools/clippy/clippy_lints/src/inconsistent_struct_constructor.rs +++ b/src/tools/clippy/clippy_lints/src/inconsistent_struct_constructor.rs @@ -1,11 +1,10 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet; -use if_chain::if_chain; use rustc_data_structures::fx::FxHashMap; use rustc_errors::Applicability; use rustc_hir::{self as hir, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::symbol::Symbol; use std::fmt::{self, Write as _}; @@ -66,54 +65,53 @@ declare_lint_pass!(InconsistentStructConstructor => [INCONSISTENT_STRUCT_CONSTRU impl<'tcx> LateLintPass<'tcx> for InconsistentStructConstructor { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx hir::Expr<'_>) { - if_chain! { - if !expr.span.from_expansion(); - if let ExprKind::Struct(qpath, fields, base) = expr.kind; - let ty = cx.typeck_results().expr_ty(expr); - if let Some(adt_def) = ty.ty_adt_def(); - if adt_def.is_struct(); - if let Some(variant) = adt_def.variants().iter().next(); - if fields.iter().all(|f| f.is_shorthand); - then { - let mut def_order_map = FxHashMap::default(); - for (idx, field) in variant.fields.iter().enumerate() { - def_order_map.insert(field.name, idx); - } + if !expr.span.from_expansion() + && let ExprKind::Struct(qpath, fields, base) = expr.kind + && let ty = cx.typeck_results().expr_ty(expr) + && let Some(adt_def) = ty.ty_adt_def() + && adt_def.is_struct() + && let Some(variant) = adt_def.variants().iter().next() + && fields.iter().all(|f| f.is_shorthand) + { + let mut def_order_map = FxHashMap::default(); + for (idx, field) in variant.fields.iter().enumerate() { + def_order_map.insert(field.name, idx); + } - if is_consistent_order(fields, &def_order_map) { - return; - } + if is_consistent_order(fields, &def_order_map) { + return; + } - let mut ordered_fields: Vec<_> = fields.iter().map(|f| f.ident.name).collect(); - ordered_fields.sort_unstable_by_key(|id| def_order_map[id]); + let mut ordered_fields: Vec<_> = fields.iter().map(|f| f.ident.name).collect(); + ordered_fields.sort_unstable_by_key(|id| def_order_map[id]); - let mut fields_snippet = String::new(); - let (last_ident, idents) = ordered_fields.split_last().unwrap(); - for ident in idents { - let _: fmt::Result = write!(fields_snippet, "{ident}, "); - } - fields_snippet.push_str(&last_ident.to_string()); + let mut fields_snippet = String::new(); + let (last_ident, idents) = ordered_fields.split_last().unwrap(); + for ident in idents { + let _: fmt::Result = write!(fields_snippet, "{ident}, "); + } + fields_snippet.push_str(&last_ident.to_string()); - let base_snippet = if let Some(base) = base { - format!(", ..{}", snippet(cx, base.span, "..")) - } else { - String::new() - }; + let base_snippet = if let Some(base) = base { + format!(", ..{}", snippet(cx, base.span, "..")) + } else { + String::new() + }; - let sugg = format!("{} {{ {fields_snippet}{base_snippet} }}", - snippet(cx, qpath.span(), ".."), - ); + let sugg = format!( + "{} {{ {fields_snippet}{base_snippet} }}", + snippet(cx, qpath.span(), ".."), + ); - span_lint_and_sugg( - cx, - INCONSISTENT_STRUCT_CONSTRUCTOR, - expr.span, - "struct constructor field order is inconsistent with struct definition field order", - "try", - sugg, - Applicability::MachineApplicable, - ) - } + span_lint_and_sugg( + cx, + INCONSISTENT_STRUCT_CONSTRUCTOR, + expr.span, + "struct constructor field order is inconsistent with struct definition field order", + "try", + sugg, + Applicability::MachineApplicable, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/index_refutable_slice.rs b/src/tools/clippy/clippy_lints/src/index_refutable_slice.rs index c2f1f18e3..5417c13d0 100644 --- a/src/tools/clippy/clippy_lints/src/index_refutable_slice.rs +++ b/src/tools/clippy/clippy_lints/src/index_refutable_slice.rs @@ -4,7 +4,6 @@ use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::higher::IfLet; use clippy_utils::ty::is_copy; use clippy_utils::{is_expn_of, is_lint_allowed, path_to_local}; -use if_chain::if_chain; use rustc_data_structures::fx::{FxHashSet, FxIndexMap}; use rustc_errors::Applicability; use rustc_hir as hir; @@ -12,7 +11,7 @@ use rustc_hir::intravisit::{self, Visitor}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::hir::nested_filter; use rustc_middle::ty; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::symbol::Ident; use rustc_span::Span; @@ -70,20 +69,17 @@ impl_lint_pass!(IndexRefutableSlice => [INDEX_REFUTABLE_SLICE]); impl<'tcx> LateLintPass<'tcx> for IndexRefutableSlice { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx hir::Expr<'_>) { - if_chain! { - if !expr.span.from_expansion() || is_expn_of(expr.span, "if_chain").is_some(); - if let Some(IfLet {let_pat, if_then, ..}) = IfLet::hir(cx, expr); - if !is_lint_allowed(cx, INDEX_REFUTABLE_SLICE, expr.hir_id); - if self.msrv.meets(msrvs::SLICE_PATTERNS); - - let found_slices = find_slice_values(cx, let_pat); - if !found_slices.is_empty(); - let filtered_slices = filter_lintable_slices(cx, found_slices, self.max_suggested_slice, if_then); - if !filtered_slices.is_empty(); - then { - for slice in filtered_slices.values() { - lint_slice(cx, slice); - } + if (!expr.span.from_expansion() || is_expn_of(expr.span, "if_chain").is_some()) + && let Some(IfLet { let_pat, if_then, .. }) = IfLet::hir(cx, expr) + && !is_lint_allowed(cx, INDEX_REFUTABLE_SLICE, expr.hir_id) + && self.msrv.meets(msrvs::SLICE_PATTERNS) + && let found_slices = find_slice_values(cx, let_pat) + && !found_slices.is_empty() + && let filtered_slices = filter_lintable_slices(cx, found_slices, self.max_suggested_slice, if_then) + && !filtered_slices.is_empty() + { + for slice in filtered_slices.values() { + lint_slice(cx, slice); } } } @@ -245,28 +241,26 @@ impl<'a, 'tcx> Visitor<'tcx> for SliceIndexLintingVisitor<'a, 'tcx> { max_suggested_slice, } = *self; - if_chain! { + if let Some(use_info) = slice_lint_info.get_mut(&local_id) // Check if this is even a local we're interested in - if let Some(use_info) = slice_lint_info.get_mut(&local_id); - let map = cx.tcx.hir(); + && let map = cx.tcx.hir() // Checking for slice indexing - let parent_id = map.parent_id(expr.hir_id); - if let Some(hir::Node::Expr(parent_expr)) = map.find(parent_id); - if let hir::ExprKind::Index(_, index_expr, _) = parent_expr.kind; - if let Some(Constant::Int(index_value)) = constant(cx, cx.typeck_results(), index_expr); - if let Ok(index_value) = index_value.try_into(); - if index_value < max_suggested_slice; + && let parent_id = map.parent_id(expr.hir_id) + && let Some(hir::Node::Expr(parent_expr)) = cx.tcx.opt_hir_node(parent_id) + && let hir::ExprKind::Index(_, index_expr, _) = parent_expr.kind + && let Some(Constant::Int(index_value)) = constant(cx, cx.typeck_results(), index_expr) + && let Ok(index_value) = index_value.try_into() + && index_value < max_suggested_slice // Make sure that this slice index is read only - let maybe_addrof_id = map.parent_id(parent_id); - if let Some(hir::Node::Expr(maybe_addrof_expr)) = map.find(maybe_addrof_id); - if let hir::ExprKind::AddrOf(_kind, hir::Mutability::Not, _inner_expr) = maybe_addrof_expr.kind; - then { - use_info.index_use.push((index_value, map.span(parent_expr.hir_id))); - return; - } + && let maybe_addrof_id = map.parent_id(parent_id) + && let Some(hir::Node::Expr(maybe_addrof_expr)) = cx.tcx.opt_hir_node(maybe_addrof_id) + && let hir::ExprKind::AddrOf(_kind, hir::Mutability::Not, _inner_expr) = maybe_addrof_expr.kind + { + use_info.index_use.push((index_value, map.span(parent_expr.hir_id))); + return; } // The slice was used for something other than indexing diff --git a/src/tools/clippy/clippy_lints/src/indexing_slicing.rs b/src/tools/clippy/clippy_lints/src/indexing_slicing.rs index 1ce7d85d3..0ae03d101 100644 --- a/src/tools/clippy/clippy_lints/src/indexing_slicing.rs +++ b/src/tools/clippy/clippy_lints/src/indexing_slicing.rs @@ -7,7 +7,7 @@ use rustc_ast::ast::RangeLimits; use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/ineffective_open_options.rs b/src/tools/clippy/clippy_lints/src/ineffective_open_options.rs new file mode 100644 index 000000000..955f90d42 --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/ineffective_open_options.rs @@ -0,0 +1,95 @@ +use crate::methods::method_call; +use clippy_utils::diagnostics::span_lint_and_sugg; +use clippy_utils::peel_blocks; +use rustc_ast::LitKind; +use rustc_errors::Applicability; +use rustc_hir::{Expr, ExprKind}; +use rustc_lint::{LateContext, LateLintPass}; +use rustc_middle::ty; +use rustc_session::declare_lint_pass; +use rustc_span::{sym, BytePos, Span}; + +declare_clippy_lint! { + /// ### What it does + /// Checks if both `.write(true)` and `.append(true)` methods are called + /// on a same `OpenOptions`. + /// + /// ### Why is this bad? + /// `.append(true)` already enables `write(true)`, making this one + /// superflous. + /// + /// ### Example + /// ```no_run + /// # use std::fs::OpenOptions; + /// let _ = OpenOptions::new() + /// .write(true) + /// .append(true) + /// .create(true) + /// .open("file.json"); + /// ``` + /// Use instead: + /// ```no_run + /// # use std::fs::OpenOptions; + /// let _ = OpenOptions::new() + /// .append(true) + /// .create(true) + /// .open("file.json"); + /// ``` + #[clippy::version = "1.76.0"] + pub INEFFECTIVE_OPEN_OPTIONS, + suspicious, + "usage of both `write(true)` and `append(true)` on same `OpenOptions`" +} + +declare_lint_pass!(IneffectiveOpenOptions => [INEFFECTIVE_OPEN_OPTIONS]); + +fn index_if_arg_is_boolean(args: &[Expr<'_>], call_span: Span) -> Option<Span> { + if let [arg] = args + && let ExprKind::Lit(lit) = peel_blocks(arg).kind + && lit.node == LitKind::Bool(true) + { + // The `.` is not included in the span so we cheat a little bit to include it as well. + Some(call_span.with_lo(call_span.lo() - BytePos(1))) + } else { + None + } +} + +impl<'tcx> LateLintPass<'tcx> for IneffectiveOpenOptions { + fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) { + let Some(("open", mut receiver, [_arg], _, _)) = method_call(expr) else { + return; + }; + let receiver_ty = cx.typeck_results().expr_ty(receiver); + match receiver_ty.peel_refs().kind() { + ty::Adt(adt, _) if cx.tcx.is_diagnostic_item(sym::FsOpenOptions, adt.did()) => {}, + _ => return, + } + + let mut append = None; + let mut write = None; + + while let Some((name, recv, args, _, span)) = method_call(receiver) { + if name == "append" { + append = index_if_arg_is_boolean(args, span); + } else if name == "write" { + write = index_if_arg_is_boolean(args, span); + } + receiver = recv; + } + + if let Some(write_span) = write + && append.is_some() + { + span_lint_and_sugg( + cx, + INEFFECTIVE_OPEN_OPTIONS, + write_span, + "unnecessary use of `.write(true)` because there is `.append(true)`", + "remove `.write(true)`", + String::new(), + Applicability::MachineApplicable, + ); + } + } +} diff --git a/src/tools/clippy/clippy_lints/src/infinite_iter.rs b/src/tools/clippy/clippy_lints/src/infinite_iter.rs index e9c53671a..9ad027358 100644 --- a/src/tools/clippy/clippy_lints/src/infinite_iter.rs +++ b/src/tools/clippy/clippy_lints/src/infinite_iter.rs @@ -3,7 +3,7 @@ use clippy_utils::higher; use clippy_utils::ty::{implements_trait, is_type_diagnostic_item}; use rustc_hir::{BorrowKind, Closure, Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::symbol::{sym, Symbol}; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/inherent_impl.rs b/src/tools/clippy/clippy_lints/src/inherent_impl.rs index a61a64161..e4781752e 100644 --- a/src/tools/clippy/clippy_lints/src/inherent_impl.rs +++ b/src/tools/clippy/clippy_lints/src/inherent_impl.rs @@ -6,7 +6,7 @@ use rustc_data_structures::fx::FxHashMap; use rustc_hir::def_id::LocalDefId; use rustc_hir::{Item, ItemKind, Node}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::Span; use std::collections::hash_map::Entry; @@ -63,7 +63,7 @@ impl<'tcx> LateLintPass<'tcx> for MultipleInherentImpl { && !is_lint_allowed( cx, MULTIPLE_INHERENT_IMPL, - cx.tcx.hir().local_def_id_to_hir_id(id), + cx.tcx.local_def_id_to_hir_id(id), ) }) { for impl_id in impl_ids.iter().map(|id| id.expect_local()) { @@ -117,12 +117,12 @@ impl<'tcx> LateLintPass<'tcx> for MultipleInherentImpl { /// Gets the span for the given impl block unless it's not being considered by the lint. fn get_impl_span(cx: &LateContext<'_>, id: LocalDefId) -> Option<Span> { - let id = cx.tcx.hir().local_def_id_to_hir_id(id); + let id = cx.tcx.local_def_id_to_hir_id(id); if let Node::Item(&Item { kind: ItemKind::Impl(impl_item), span, .. - }) = cx.tcx.hir().get(id) + }) = cx.tcx.hir_node(id) { (!span.from_expansion() && impl_item.generics.params.is_empty() diff --git a/src/tools/clippy/clippy_lints/src/inherent_to_string.rs b/src/tools/clippy/clippy_lints/src/inherent_to_string.rs index fe5eb5cca..ca2ac6030 100644 --- a/src/tools/clippy/clippy_lints/src/inherent_to_string.rs +++ b/src/tools/clippy/clippy_lints/src/inherent_to_string.rs @@ -3,7 +3,7 @@ use clippy_utils::ty::{implements_trait, is_type_lang_item}; use clippy_utils::{return_ty, trait_ref_of_method}; use rustc_hir::{GenericParamKind, ImplItem, ImplItemKind, LangItem, Unsafety}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; use rustc_target::spec::abi::Abi; diff --git a/src/tools/clippy/clippy_lints/src/init_numbered_fields.rs b/src/tools/clippy/clippy_lints/src/init_numbered_fields.rs index 269311a67..e48656380 100644 --- a/src/tools/clippy/clippy_lints/src/init_numbered_fields.rs +++ b/src/tools/clippy/clippy_lints/src/init_numbered_fields.rs @@ -4,7 +4,7 @@ use rustc_errors::Applicability; use rustc_hir::def::{DefKind, Res}; use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use std::borrow::Cow; use std::cmp::Reverse; use std::collections::BinaryHeap; diff --git a/src/tools/clippy/clippy_lints/src/inline_fn_without_body.rs b/src/tools/clippy/clippy_lints/src/inline_fn_without_body.rs index 899126565..bc236c5c7 100644 --- a/src/tools/clippy/clippy_lints/src/inline_fn_without_body.rs +++ b/src/tools/clippy/clippy_lints/src/inline_fn_without_body.rs @@ -6,7 +6,7 @@ use rustc_ast::ast::Attribute; use rustc_errors::Applicability; use rustc_hir::{TraitFn, TraitItem, TraitItemKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::{sym, Symbol}; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/instant_subtraction.rs b/src/tools/clippy/clippy_lints/src/instant_subtraction.rs index 32b2cb438..655f4b82a 100644 --- a/src/tools/clippy/clippy_lints/src/instant_subtraction.rs +++ b/src/tools/clippy/clippy_lints/src/instant_subtraction.rs @@ -6,7 +6,7 @@ use clippy_utils::ty; use rustc_errors::Applicability; use rustc_hir::{BinOpKind, Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::source_map::Spanned; use rustc_span::sym; @@ -89,27 +89,17 @@ impl LateLintPass<'_> for InstantSubtraction { rhs, ) = expr.kind { - if_chain! { - if is_instant_now_call(cx, lhs); - - if is_an_instant(cx, rhs); - if let Some(sugg) = Sugg::hir_opt(cx, rhs); - - then { - print_manual_instant_elapsed_sugg(cx, expr, sugg) - } else { - if_chain! { - if !expr.span.from_expansion(); - if self.msrv.meets(msrvs::TRY_FROM); - - if is_an_instant(cx, lhs); - if is_a_duration(cx, rhs); - - then { - print_unchecked_duration_subtraction_sugg(cx, lhs, rhs, expr) - } - } - } + if is_instant_now_call(cx, lhs) + && is_an_instant(cx, rhs) + && let Some(sugg) = Sugg::hir_opt(cx, rhs) + { + print_manual_instant_elapsed_sugg(cx, expr, sugg); + } else if !expr.span.from_expansion() + && self.msrv.meets(msrvs::TRY_FROM) + && is_an_instant(cx, lhs) + && is_a_duration(cx, rhs) + { + print_unchecked_duration_subtraction_sugg(cx, lhs, rhs, expr); } } } diff --git a/src/tools/clippy/clippy_lints/src/int_plus_one.rs b/src/tools/clippy/clippy_lints/src/int_plus_one.rs index 9ffcee07d..b8e0eef7c 100644 --- a/src/tools/clippy/clippy_lints/src/int_plus_one.rs +++ b/src/tools/clippy/clippy_lints/src/int_plus_one.rs @@ -6,7 +6,7 @@ use rustc_ast::ast::{BinOpKind, Expr, ExprKind, LitKind}; use rustc_ast::token; use rustc_errors::Applicability; use rustc_lint::{EarlyContext, EarlyLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/invalid_upcast_comparisons.rs b/src/tools/clippy/clippy_lints/src/invalid_upcast_comparisons.rs index de82935e6..8bcd9b532 100644 --- a/src/tools/clippy/clippy_lints/src/invalid_upcast_comparisons.rs +++ b/src/tools/clippy/clippy_lints/src/invalid_upcast_comparisons.rs @@ -2,7 +2,7 @@ use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::layout::LayoutOf; use rustc_middle::ty::{self, IntTy, UintTy}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::Span; use clippy_utils::comparisons; diff --git a/src/tools/clippy/clippy_lints/src/item_name_repetitions.rs b/src/tools/clippy/clippy_lints/src/item_name_repetitions.rs index 90048d96c..a9f1612ff 100644 --- a/src/tools/clippy/clippy_lints/src/item_name_repetitions.rs +++ b/src/tools/clippy/clippy_lints/src/item_name_repetitions.rs @@ -6,9 +6,9 @@ use clippy_utils::source::is_present_in_source; use clippy_utils::str_utils::{camel_case_split, count_match_end, count_match_start, to_camel_case, to_snake_case}; use rustc_hir::{EnumDef, FieldDef, Item, ItemKind, OwnerId, Variant, VariantData}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; -use rustc_span::Span; +use rustc_session::impl_lint_pass; use rustc_span::symbol::Symbol; +use rustc_span::Span; declare_clippy_lint! { /// ### What it does @@ -436,7 +436,7 @@ impl LateLintPass<'_> for ItemNameRepetitions { { match item.kind { ItemKind::Enum(def, _) => check_variant(cx, self.enum_threshold, &def, item_name, item.span), - ItemKind::Struct(VariantData::Struct(fields, _), _) => { + ItemKind::Struct(VariantData::Struct { fields, .. }, _) => { check_fields(cx, self.struct_threshold, item, fields); }, _ => (), diff --git a/src/tools/clippy/clippy_lints/src/items_after_statements.rs b/src/tools/clippy/clippy_lints/src/items_after_statements.rs index 9605d76fb..39223c204 100644 --- a/src/tools/clippy/clippy_lints/src/items_after_statements.rs +++ b/src/tools/clippy/clippy_lints/src/items_after_statements.rs @@ -4,7 +4,7 @@ use clippy_utils::diagnostics::span_lint_hir; use rustc_hir::{Block, ItemKind, StmtKind}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/items_after_test_module.rs b/src/tools/clippy/clippy_lints/src/items_after_test_module.rs index 35e01862c..3614fb8cc 100644 --- a/src/tools/clippy/clippy_lints/src/items_after_test_module.rs +++ b/src/tools/clippy/clippy_lints/src/items_after_test_module.rs @@ -4,7 +4,7 @@ use clippy_utils::{fulfill_or_allowed, is_cfg_test, is_from_proc_macro}; use rustc_errors::{Applicability, SuggestionStyle}; use rustc_hir::{HirId, Item, ItemKind, Mod}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::hygiene::AstPass; use rustc_span::{sym, ExpnKind}; diff --git a/src/tools/clippy/clippy_lints/src/iter_not_returning_iterator.rs b/src/tools/clippy/clippy_lints/src/iter_not_returning_iterator.rs index 505aadd1a..b9fad7265 100644 --- a/src/tools/clippy/clippy_lints/src/iter_not_returning_iterator.rs +++ b/src/tools/clippy/clippy_lints/src/iter_not_returning_iterator.rs @@ -4,7 +4,7 @@ use clippy_utils::ty::implements_trait; use rustc_hir::def_id::LocalDefId; use rustc_hir::{FnSig, ImplItem, ImplItemKind, Item, ItemKind, Node, TraitItem, TraitItemKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::symbol::sym; declare_clippy_lint! { @@ -71,7 +71,7 @@ fn check_sig(cx: &LateContext<'_>, name: &str, sig: &FnSig<'_>, fn_id: LocalDefI if sig.decl.implicit_self.has_implicit_self() { let ret_ty = cx .tcx - .erase_late_bound_regions(cx.tcx.fn_sig(fn_id).instantiate_identity().output()); + .instantiate_bound_regions_with_erased(cx.tcx.fn_sig(fn_id).instantiate_identity().output()); let ret_ty = cx .tcx .try_normalize_erasing_regions(cx.param_env, ret_ty) diff --git a/src/tools/clippy/clippy_lints/src/iter_over_hash_type.rs b/src/tools/clippy/clippy_lints/src/iter_over_hash_type.rs new file mode 100644 index 000000000..8110c1970 --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/iter_over_hash_type.rs @@ -0,0 +1,78 @@ +use clippy_utils::diagnostics::span_lint; +use clippy_utils::higher::ForLoop; +use clippy_utils::match_any_def_paths; +use clippy_utils::paths::{ + HASHMAP_DRAIN, HASHMAP_ITER, HASHMAP_ITER_MUT, HASHMAP_KEYS, HASHMAP_VALUES, HASHMAP_VALUES_MUT, HASHSET_DRAIN, + HASHSET_ITER_TY, +}; +use clippy_utils::ty::is_type_diagnostic_item; +use rustc_lint::{LateContext, LateLintPass}; +use rustc_session::declare_lint_pass; +use rustc_span::sym; + +declare_clippy_lint! { + /// ### What it does + /// This is a restriction lint which prevents the use of hash types (i.e., `HashSet` and `HashMap`) in for loops. + /// + /// ### Why is this bad? + /// Because hash types are unordered, when iterated through such as in a for loop, the values are returned in + /// an undefined order. As a result, on redundant systems this may cause inconsistencies and anomalies. + /// In addition, the unknown order of the elements may reduce readability or introduce other undesired + /// side effects. + /// + /// ### Example + /// ```no_run + /// let my_map = std::collections::HashMap::<i32, String>::new(); + /// for (key, value) in my_map { /* ... */ } + /// ``` + /// Use instead: + /// ```no_run + /// let my_map = std::collections::HashMap::<i32, String>::new(); + /// let mut keys = my_map.keys().clone().collect::<Vec<_>>(); + /// keys.sort(); + /// for key in keys { + /// let value = &my_map[key]; + /// } + /// ``` + #[clippy::version = "1.75.0"] + pub ITER_OVER_HASH_TYPE, + restriction, + "iterating over unordered hash-based types (`HashMap` and `HashSet`)" +} + +declare_lint_pass!(IterOverHashType => [ITER_OVER_HASH_TYPE]); + +impl LateLintPass<'_> for IterOverHashType { + fn check_expr(&mut self, cx: &LateContext<'_>, expr: &'_ rustc_hir::Expr<'_>) { + if let Some(for_loop) = ForLoop::hir(expr) + && !for_loop.body.span.from_expansion() + && let ty = cx.typeck_results().expr_ty(for_loop.arg).peel_refs() + && let Some(adt) = ty.ty_adt_def() + && let did = adt.did() + && (match_any_def_paths( + cx, + did, + &[ + &HASHMAP_KEYS, + &HASHMAP_VALUES, + &HASHMAP_VALUES_MUT, + &HASHMAP_ITER, + &HASHMAP_ITER_MUT, + &HASHMAP_DRAIN, + &HASHSET_ITER_TY, + &HASHSET_DRAIN, + ], + ) + .is_some() + || is_type_diagnostic_item(cx, ty, sym::HashMap) + || is_type_diagnostic_item(cx, ty, sym::HashSet)) + { + span_lint( + cx, + ITER_OVER_HASH_TYPE, + expr.span, + "iteration over unordered hash-based type", + ); + }; + } +} diff --git a/src/tools/clippy/clippy_lints/src/iter_without_into_iter.rs b/src/tools/clippy/clippy_lints/src/iter_without_into_iter.rs index 3c291f255..3a5756482 100644 --- a/src/tools/clippy/clippy_lints/src/iter_without_into_iter.rs +++ b/src/tools/clippy/clippy_lints/src/iter_without_into_iter.rs @@ -7,7 +7,7 @@ use rustc_errors::Applicability; use rustc_hir::{FnRetTy, ImplItemKind, ImplicitSelfKind, ItemKind, TyKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::{self, Ty}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::{sym, Symbol}; use std::iter; diff --git a/src/tools/clippy/clippy_lints/src/large_const_arrays.rs b/src/tools/clippy/clippy_lints/src/large_const_arrays.rs index a4f3d4983..b561054b5 100644 --- a/src/tools/clippy/clippy_lints/src/large_const_arrays.rs +++ b/src/tools/clippy/clippy_lints/src/large_const_arrays.rs @@ -1,11 +1,10 @@ use clippy_utils::diagnostics::span_lint_and_then; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{Item, ItemKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::layout::LayoutOf; use rustc_middle::ty::{self, ConstKind}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::{BytePos, Pos, Span}; declare_clippy_lint! { @@ -47,43 +46,40 @@ impl_lint_pass!(LargeConstArrays => [LARGE_CONST_ARRAYS]); impl<'tcx> LateLintPass<'tcx> for LargeConstArrays { fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx Item<'_>) { - if_chain! { - if !item.span.from_expansion(); - if let ItemKind::Const(_, generics, _) = &item.kind; + if !item.span.from_expansion() + && let ItemKind::Const(_, generics, _) = &item.kind // Since static items may not have generics, skip generic const items. // FIXME(generic_const_items): I don't think checking `generics.hwcp` suffices as it // doesn't account for empty where-clauses that only consist of keyword `where` IINM. - if generics.params.is_empty() && !generics.has_where_clause_predicates; - let ty = cx.tcx.type_of(item.owner_id).instantiate_identity(); - if let ty::Array(element_type, cst) = ty.kind(); - if let ConstKind::Value(ty::ValTree::Leaf(element_count)) = cst.kind(); - if let Ok(element_count) = element_count.try_to_target_usize(cx.tcx); - if let Ok(element_size) = cx.layout_of(*element_type).map(|l| l.size.bytes()); - if self.maximum_allowed_size < u128::from(element_count) * u128::from(element_size); - - then { - let hi_pos = item.ident.span.lo() - BytePos::from_usize(1); - let sugg_span = Span::new( - hi_pos - BytePos::from_usize("const".len()), - hi_pos, - item.span.ctxt(), - item.span.parent(), - ); - span_lint_and_then( - cx, - LARGE_CONST_ARRAYS, - item.span, - "large array defined as const", - |diag| { - diag.span_suggestion( - sugg_span, - "make this a static item", - "static", - Applicability::MachineApplicable, - ); - } - ); - } + && generics.params.is_empty() && !generics.has_where_clause_predicates + && let ty = cx.tcx.type_of(item.owner_id).instantiate_identity() + && let ty::Array(element_type, cst) = ty.kind() + && let ConstKind::Value(ty::ValTree::Leaf(element_count)) = cst.kind() + && let Ok(element_count) = element_count.try_to_target_usize(cx.tcx) + && let Ok(element_size) = cx.layout_of(*element_type).map(|l| l.size.bytes()) + && self.maximum_allowed_size < u128::from(element_count) * u128::from(element_size) + { + let hi_pos = item.ident.span.lo() - BytePos::from_usize(1); + let sugg_span = Span::new( + hi_pos - BytePos::from_usize("const".len()), + hi_pos, + item.span.ctxt(), + item.span.parent(), + ); + span_lint_and_then( + cx, + LARGE_CONST_ARRAYS, + item.span, + "large array defined as const", + |diag| { + diag.span_suggestion( + sugg_span, + "make this a static item", + "static", + Applicability::MachineApplicable, + ); + }, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/large_enum_variant.rs b/src/tools/clippy/clippy_lints/src/large_enum_variant.rs index 0bf9b8718..6feb18855 100644 --- a/src/tools/clippy/clippy_lints/src/large_enum_variant.rs +++ b/src/tools/clippy/clippy_lints/src/large_enum_variant.rs @@ -8,7 +8,7 @@ use rustc_hir::{Item, ItemKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::lint::in_external_macro; use rustc_middle::ty::{Adt, Ty}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::Span; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/large_futures.rs b/src/tools/clippy/clippy_lints/src/large_futures.rs index 26a727852..eb7570e9b 100644 --- a/src/tools/clippy/clippy_lints/src/large_futures.rs +++ b/src/tools/clippy/clippy_lints/src/large_futures.rs @@ -4,7 +4,7 @@ use clippy_utils::ty::implements_trait; use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind, LangItem, MatchSource, QPath}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_target::abi::Size; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/large_include_file.rs b/src/tools/clippy/clippy_lints/src/large_include_file.rs index 566901de3..1b5981ecc 100644 --- a/src/tools/clippy/clippy_lints/src/large_include_file.rs +++ b/src/tools/clippy/clippy_lints/src/large_include_file.rs @@ -4,7 +4,7 @@ use clippy_utils::macros::root_macro_call_first_node; use rustc_ast::LitKind; use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::sym; declare_clippy_lint! { @@ -50,37 +50,35 @@ impl_lint_pass!(LargeIncludeFile => [LARGE_INCLUDE_FILE]); impl LateLintPass<'_> for LargeIncludeFile { fn check_expr(&mut self, cx: &LateContext<'_>, expr: &'_ Expr<'_>) { - if_chain! { - if let Some(macro_call) = root_macro_call_first_node(cx, expr); - if !is_lint_allowed(cx, LARGE_INCLUDE_FILE, expr.hir_id); - if cx.tcx.is_diagnostic_item(sym::include_bytes_macro, macro_call.def_id) - || cx.tcx.is_diagnostic_item(sym::include_str_macro, macro_call.def_id); - if let ExprKind::Lit(lit) = &expr.kind; - then { - let len = match &lit.node { - // include_bytes - LitKind::ByteStr(bstr, _) => bstr.len(), - // include_str - LitKind::Str(sym, _) => sym.as_str().len(), - _ => return, - }; + if let Some(macro_call) = root_macro_call_first_node(cx, expr) + && !is_lint_allowed(cx, LARGE_INCLUDE_FILE, expr.hir_id) + && (cx.tcx.is_diagnostic_item(sym::include_bytes_macro, macro_call.def_id) + || cx.tcx.is_diagnostic_item(sym::include_str_macro, macro_call.def_id)) + && let ExprKind::Lit(lit) = &expr.kind + { + let len = match &lit.node { + // include_bytes + LitKind::ByteStr(bstr, _) => bstr.len(), + // include_str + LitKind::Str(sym, _) => sym.as_str().len(), + _ => return, + }; - if len as u64 <= self.max_file_size { - return; - } - - span_lint_and_note( - cx, - LARGE_INCLUDE_FILE, - expr.span, - "attempted to include a large file", - None, - &format!( - "the configuration allows a maximum size of {} bytes", - self.max_file_size - ), - ); + if len as u64 <= self.max_file_size { + return; } + + span_lint_and_note( + cx, + LARGE_INCLUDE_FILE, + expr.span, + "attempted to include a large file", + None, + &format!( + "the configuration allows a maximum size of {} bytes", + self.max_file_size + ), + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/large_stack_arrays.rs b/src/tools/clippy/clippy_lints/src/large_stack_arrays.rs index 5e312ab72..fd33ba91b 100644 --- a/src/tools/clippy/clippy_lints/src/large_stack_arrays.rs +++ b/src/tools/clippy/clippy_lints/src/large_stack_arrays.rs @@ -4,7 +4,7 @@ use rustc_hir::{Expr, ExprKind, Item, ItemKind, Node}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::layout::LayoutOf; use rustc_middle::ty::{self, ConstKind}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/large_stack_frames.rs b/src/tools/clippy/clippy_lints/src/large_stack_frames.rs index 33636eb68..b397180a6 100644 --- a/src/tools/clippy/clippy_lints/src/large_stack_frames.rs +++ b/src/tools/clippy/clippy_lints/src/large_stack_frames.rs @@ -6,7 +6,7 @@ use rustc_hir::def_id::LocalDefId; use rustc_hir::intravisit::FnKind; use rustc_hir::{Body, FnDecl}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::Span; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/len_zero.rs b/src/tools/clippy/clippy_lints/src/len_zero.rs index 0f17d2676..8c032b170 100644 --- a/src/tools/clippy/clippy_lints/src/len_zero.rs +++ b/src/tools/clippy/clippy_lints/src/len_zero.rs @@ -2,22 +2,21 @@ use clippy_utils::diagnostics::{span_lint, span_lint_and_sugg, span_lint_and_the use clippy_utils::source::snippet_with_context; use clippy_utils::sugg::Sugg; use clippy_utils::{get_item_name, get_parent_as_impl, is_lint_allowed, peel_ref_operators}; -use if_chain::if_chain; use rustc_ast::ast::LitKind; use rustc_errors::Applicability; use rustc_hir::def::Res; use rustc_hir::def_id::{DefId, DefIdSet}; use rustc_hir::{ AssocItemKind, BinOpKind, Expr, ExprKind, FnRetTy, GenericArg, GenericBound, ImplItem, ImplItemKind, - ImplicitSelfKind, Item, ItemKind, LangItem, Mutability, Node, PatKind, PathSegment, PrimTy, QPath, TraitItemRef, - TyKind, TypeBindingKind, + ImplicitSelfKind, Item, ItemKind, Mutability, Node, PatKind, PathSegment, PrimTy, QPath, TraitItemRef, + TyKind, TypeBindingKind, OpaqueTyOrigin, }; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::{self, AssocKind, FnSig, Ty}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; -use rustc_span::{Span, Symbol}; +use rustc_session::declare_lint_pass; use rustc_span::source_map::Spanned; use rustc_span::symbol::sym; +use rustc_span::{Span, Symbol}; declare_clippy_lint! { /// ### What it does @@ -132,37 +131,33 @@ impl<'tcx> LateLintPass<'tcx> for LenZero { } fn check_impl_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx ImplItem<'_>) { - if_chain! { - if item.ident.name == sym::len; - if let ImplItemKind::Fn(sig, _) = &item.kind; - if sig.decl.implicit_self.has_implicit_self(); - if sig.decl.inputs.len() == 1; - if cx.effective_visibilities.is_exported(item.owner_id.def_id); - if matches!(sig.decl.output, FnRetTy::Return(_)); - if let Some(imp) = get_parent_as_impl(cx.tcx, item.hir_id()); - if imp.of_trait.is_none(); - if let TyKind::Path(ty_path) = &imp.self_ty.kind; - if let Some(ty_id) = cx.qpath_res(ty_path, imp.self_ty.hir_id).opt_def_id(); - if let Some(local_id) = ty_id.as_local(); - let ty_hir_id = cx.tcx.hir().local_def_id_to_hir_id(local_id); - if !is_lint_allowed(cx, LEN_WITHOUT_IS_EMPTY, ty_hir_id); - if let Some(output) = parse_len_output( - cx, - cx.tcx.fn_sig(item.owner_id).instantiate_identity().skip_binder() - ); - then { - let (name, kind) = match cx.tcx.hir().find(ty_hir_id) { - Some(Node::ForeignItem(x)) => (x.ident.name, "extern type"), - Some(Node::Item(x)) => match x.kind { - ItemKind::Struct(..) => (x.ident.name, "struct"), - ItemKind::Enum(..) => (x.ident.name, "enum"), - ItemKind::Union(..) => (x.ident.name, "union"), - _ => (x.ident.name, "type"), - } - _ => return, - }; - check_for_is_empty(cx, sig.span, sig.decl.implicit_self, output, ty_id, name, kind) - } + if item.ident.name == sym::len + && let ImplItemKind::Fn(sig, _) = &item.kind + && sig.decl.implicit_self.has_implicit_self() + && sig.decl.inputs.len() == 1 + && cx.effective_visibilities.is_exported(item.owner_id.def_id) + && matches!(sig.decl.output, FnRetTy::Return(_)) + && let Some(imp) = get_parent_as_impl(cx.tcx, item.hir_id()) + && imp.of_trait.is_none() + && let TyKind::Path(ty_path) = &imp.self_ty.kind + && let Some(ty_id) = cx.qpath_res(ty_path, imp.self_ty.hir_id).opt_def_id() + && let Some(local_id) = ty_id.as_local() + && let ty_hir_id = cx.tcx.local_def_id_to_hir_id(local_id) + && !is_lint_allowed(cx, LEN_WITHOUT_IS_EMPTY, ty_hir_id) + && let Some(output) = + parse_len_output(cx, cx.tcx.fn_sig(item.owner_id).instantiate_identity().skip_binder()) + { + let (name, kind) = match cx.tcx.opt_hir_node(ty_hir_id) { + Some(Node::ForeignItem(x)) => (x.ident.name, "extern type"), + Some(Node::Item(x)) => match x.kind { + ItemKind::Struct(..) => (x.ident.name, "struct"), + ItemKind::Enum(..) => (x.ident.name, "enum"), + ItemKind::Union(..) => (x.ident.name, "union"), + _ => (x.ident.name, "type"), + }, + _ => return, + }; + check_for_is_empty(cx, sig.span, sig.decl.implicit_self, output, ty_id, name, kind); } } @@ -294,8 +289,10 @@ fn extract_future_output<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>) -> Option<& kind: ItemKind::OpaqueTy(opaque), .. } = item - && opaque.bounds.len() == 1 - && let GenericBound::LangItemTrait(LangItem::Future, _, _, generic_args) = &opaque.bounds[0] + && let OpaqueTyOrigin::AsyncFn(_) = opaque.origin + && let [GenericBound::Trait(trait_ref, _)] = &opaque.bounds + && let Some(segment) = trait_ref.trait_ref.path.segments.last() + && let Some(generic_args) = segment.args && generic_args.bindings.len() == 1 && let TypeBindingKind::Equality { term: diff --git a/src/tools/clippy/clippy_lints/src/let_if_seq.rs b/src/tools/clippy/clippy_lints/src/let_if_seq.rs index 2f6f36c39..270162ae7 100644 --- a/src/tools/clippy/clippy_lints/src/let_if_seq.rs +++ b/src/tools/clippy/clippy_lints/src/let_if_seq.rs @@ -2,12 +2,11 @@ use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::path_to_local_id; use clippy_utils::source::snippet; use clippy_utils::visitors::is_local_used; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_hir::{BindingAnnotation, Mutability}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does @@ -61,76 +60,85 @@ impl<'tcx> LateLintPass<'tcx> for LetIfSeq { fn check_block(&mut self, cx: &LateContext<'tcx>, block: &'tcx hir::Block<'_>) { let mut it = block.stmts.iter().peekable(); while let Some(stmt) = it.next() { - if_chain! { - if let Some(expr) = it.peek(); - if let hir::StmtKind::Local(local) = stmt.kind; - if let hir::PatKind::Binding(mode, canonical_id, ident, None) = local.pat.kind; - if let hir::StmtKind::Expr(if_) = expr.kind; - if let hir::ExprKind::If(hir::Expr { kind: hir::ExprKind::DropTemps(cond), ..}, then, else_) = if_.kind; - if !is_local_used(cx, *cond, canonical_id); - if let hir::ExprKind::Block(then, _) = then.kind; - if let Some(value) = check_assign(cx, canonical_id, then); - if !is_local_used(cx, value, canonical_id); - then { - let span = stmt.span.to(if_.span); + if let Some(expr) = it.peek() + && let hir::StmtKind::Local(local) = stmt.kind + && let hir::PatKind::Binding(mode, canonical_id, ident, None) = local.pat.kind + && let hir::StmtKind::Expr(if_) = expr.kind + && let hir::ExprKind::If( + hir::Expr { + kind: hir::ExprKind::DropTemps(cond), + .. + }, + then, + else_, + ) = if_.kind + && !is_local_used(cx, *cond, canonical_id) + && let hir::ExprKind::Block(then, _) = then.kind + && let Some(value) = check_assign(cx, canonical_id, then) + && !is_local_used(cx, value, canonical_id) + { + let span = stmt.span.to(if_.span); - let has_interior_mutability = !cx.typeck_results().node_type(canonical_id).is_freeze( - cx.tcx, - cx.param_env, - ); - if has_interior_mutability { return; } + let has_interior_mutability = !cx + .typeck_results() + .node_type(canonical_id) + .is_freeze(cx.tcx, cx.param_env); + if has_interior_mutability { + return; + } - let (default_multi_stmts, default) = if let Some(else_) = else_ { - if let hir::ExprKind::Block(else_, _) = else_.kind { - if let Some(default) = check_assign(cx, canonical_id, else_) { - (else_.stmts.len() > 1, default) - } else if let Some(default) = local.init { - (true, default) - } else { - continue; - } + let (default_multi_stmts, default) = if let Some(else_) = else_ { + if let hir::ExprKind::Block(else_, _) = else_.kind { + if let Some(default) = check_assign(cx, canonical_id, else_) { + (else_.stmts.len() > 1, default) + } else if let Some(default) = local.init { + (true, default) } else { continue; } - } else if let Some(default) = local.init { - (false, default) } else { continue; - }; + } + } else if let Some(default) = local.init { + (false, default) + } else { + continue; + }; - let mutability = match mode { - BindingAnnotation(_, Mutability::Mut) => "<mut> ", - _ => "", - }; + let mutability = match mode { + BindingAnnotation(_, Mutability::Mut) => "<mut> ", + _ => "", + }; - // FIXME: this should not suggest `mut` if we can detect that the variable is not - // use mutably after the `if` + // FIXME: this should not suggest `mut` if we can detect that the variable is not + // use mutably after the `if` - let sug = format!( - "let {mutability}{name} = if {cond} {{{then} {value} }} else {{{else} {default} }};", - name=ident.name, - cond=snippet(cx, cond.span, "_"), - then=if then.stmts.len() > 1 { " ..;" } else { "" }, - else=if default_multi_stmts { " ..;" } else { "" }, - value=snippet(cx, value.span, "<value>"), - default=snippet(cx, default.span, "<default>"), - ); - span_lint_and_then(cx, - USELESS_LET_IF_SEQ, - span, - "`if _ { .. } else { .. }` is an expression", - |diag| { - diag.span_suggestion( - span, - "it is more idiomatic to write", - sug, - Applicability::HasPlaceholders, - ); - if !mutability.is_empty() { - diag.note("you might not need `mut` at all"); - } - }); - } + let sug = format!( + "let {mutability}{name} = if {cond} {{{then} {value} }} else {{{else} {default} }};", + name=ident.name, + cond=snippet(cx, cond.span, "_"), + then=if then.stmts.len() > 1 { " ..;" } else { "" }, + else=if default_multi_stmts { " ..;" } else { "" }, + value=snippet(cx, value.span, "<value>"), + default=snippet(cx, default.span, "<default>"), + ); + span_lint_and_then( + cx, + USELESS_LET_IF_SEQ, + span, + "`if _ { .. } else { .. }` is an expression", + |diag| { + diag.span_suggestion( + span, + "it is more idiomatic to write", + sug, + Applicability::HasPlaceholders, + ); + if !mutability.is_empty() { + diag.note("you might not need `mut` at all"); + } + }, + ); } } } @@ -141,20 +149,23 @@ fn check_assign<'tcx>( decl: hir::HirId, block: &'tcx hir::Block<'_>, ) -> Option<&'tcx hir::Expr<'tcx>> { - if_chain! { - if block.expr.is_none(); - if let Some(expr) = block.stmts.iter().last(); - if let hir::StmtKind::Semi(expr) = expr.kind; - if let hir::ExprKind::Assign(var, value, _) = expr.kind; - if path_to_local_id(var, decl); - then { - if block.stmts.iter().take(block.stmts.len()-1).any(|stmt| is_local_used(cx, stmt, decl)) { - None - } else { - Some(value) - } - } else { + if block.expr.is_none() + && let Some(expr) = block.stmts.iter().last() + && let hir::StmtKind::Semi(expr) = expr.kind + && let hir::ExprKind::Assign(var, value, _) = expr.kind + && path_to_local_id(var, decl) + { + if block + .stmts + .iter() + .take(block.stmts.len() - 1) + .any(|stmt| is_local_used(cx, stmt, decl)) + { None + } else { + Some(value) } + } else { + None } } diff --git a/src/tools/clippy/clippy_lints/src/let_underscore.rs b/src/tools/clippy/clippy_lints/src/let_underscore.rs index 04f23a213..606c2ed72 100644 --- a/src/tools/clippy/clippy_lints/src/let_underscore.rs +++ b/src/tools/clippy/clippy_lints/src/let_underscore.rs @@ -5,7 +5,7 @@ use rustc_hir::{Local, PatKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::lint::in_external_macro; use rustc_middle::ty::{GenericArgKind, IsSuggestable}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::{BytePos, Span}; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/let_with_type_underscore.rs b/src/tools/clippy/clippy_lints/src/let_with_type_underscore.rs index 79d728a02..5f3f9b43f 100644 --- a/src/tools/clippy/clippy_lints/src/let_with_type_underscore.rs +++ b/src/tools/clippy/clippy_lints/src/let_with_type_underscore.rs @@ -3,7 +3,7 @@ use clippy_utils::source::snippet; use rustc_hir::{Local, TyKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does @@ -27,27 +27,25 @@ declare_lint_pass!(UnderscoreTyped => [LET_WITH_TYPE_UNDERSCORE]); impl LateLintPass<'_> for UnderscoreTyped { fn check_local(&mut self, cx: &LateContext<'_>, local: &Local<'_>) { - if_chain! { - if !in_external_macro(cx.tcx.sess, local.span); - if let Some(ty) = local.ty; // Ensure that it has a type defined - if let TyKind::Infer = &ty.kind; // that type is '_' - if local.span.eq_ctxt(ty.span); - then { - // NOTE: Using `is_from_proc_macro` on `init` will require that it's initialized, - // this doesn't. Alternatively, `WithSearchPat` can be implemented for `Ty` - if snippet(cx, ty.span, "_").trim() != "_" { - return; - } - - span_lint_and_help( - cx, - LET_WITH_TYPE_UNDERSCORE, - local.span, - "variable declared with type underscore", - Some(ty.span.with_lo(local.pat.span.hi())), - "remove the explicit type `_` declaration" - ) + if !in_external_macro(cx.tcx.sess, local.span) + && let Some(ty) = local.ty // Ensure that it has a type defined + && let TyKind::Infer = &ty.kind // that type is '_' + && local.span.eq_ctxt(ty.span) + { + // NOTE: Using `is_from_proc_macro` on `init` will require that it's initialized, + // this doesn't. Alternatively, `WithSearchPat` can be implemented for `Ty` + if snippet(cx, ty.span, "_").trim() != "_" { + return; } + + span_lint_and_help( + cx, + LET_WITH_TYPE_UNDERSCORE, + local.span, + "variable declared with type underscore", + Some(ty.span.with_lo(local.pat.span.hi())), + "remove the explicit type `_` declaration", + ); }; } } diff --git a/src/tools/clippy/clippy_lints/src/lib.rs b/src/tools/clippy/clippy_lints/src/lib.rs index ab978a677..7758d6a58 100644 --- a/src/tools/clippy/clippy_lints/src/lib.rs +++ b/src/tools/clippy/clippy_lints/src/lib.rs @@ -50,9 +50,10 @@ extern crate clippy_utils; #[macro_use] extern crate declare_clippy_lint; +use std::collections::BTreeMap; + use rustc_data_structures::fx::FxHashSet; use rustc_lint::{Lint, LintId}; -use rustc_session::Session; #[cfg(feature = "internal")] pub mod deprecated_lints; @@ -75,7 +76,7 @@ mod assertions_on_result_states; mod async_yields_async; mod attrs; mod await_holding_invalid; -mod blocks_in_if_conditions; +mod blocks_in_conditions; mod bool_assert_comparison; mod bool_to_int_with_if; mod booleans; @@ -145,6 +146,7 @@ mod if_let_mutex; mod if_not_else; mod if_then_some_else_none; mod ignored_unit_patterns; +mod impl_hash_with_borrow_str_and_bytes; mod implicit_hasher; mod implicit_return; mod implicit_saturating_add; @@ -153,6 +155,7 @@ mod implied_bounds_in_impls; mod inconsistent_struct_constructor; mod index_refutable_slice; mod indexing_slicing; +mod ineffective_open_options; mod infinite_iter; mod inherent_impl; mod inherent_to_string; @@ -165,6 +168,7 @@ mod item_name_repetitions; mod items_after_statements; mod items_after_test_module; mod iter_not_returning_iterator; +mod iter_over_hash_type; mod iter_without_into_iter; mod large_const_arrays; mod large_enum_variant; @@ -288,6 +292,7 @@ mod ref_option_ref; mod ref_patterns; mod reference; mod regex; +mod repeat_vec_with_capacity; mod reserve_after_initialization; mod return_self_not_must_use; mod returns; @@ -308,7 +313,6 @@ mod slow_vector_initialization; mod std_instead_of_core; mod strings; mod strlen_on_c_strings; -mod suspicious_doc_comments; mod suspicious_operation_groupings; mod suspicious_trait_impl; mod suspicious_xor_used_as_pow; @@ -325,6 +329,7 @@ mod tuple_array_conversions; mod types; mod undocumented_unsafe_blocks; mod unicode; +mod uninhabited_references; mod uninit_vec; mod unit_return_expecting_ord; mod unit_types; @@ -492,11 +497,84 @@ fn register_categories(store: &mut rustc_lint::LintStore) { groups.register(store); } -/// Register all lints and lint groups with the rustc plugin registry +/// Register all lints and lint groups with the rustc lint store /// /// Used in `./src/driver.rs`. #[expect(clippy::too_many_lines)] -pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: &'static Conf) { +pub fn register_lints(store: &mut rustc_lint::LintStore, conf: &'static Conf) { + let Conf { + ref absolute_paths_allowed_crates, + absolute_paths_max_segments, + accept_comment_above_attributes, + accept_comment_above_statement, + allow_dbg_in_tests, + allow_expect_in_tests, + allow_mixed_uninlined_format_args, + allow_one_hash_in_raw_strings, + allow_print_in_tests, + allow_private_module_inception, + allow_unwrap_in_tests, + ref allowed_dotfiles, + ref allowed_idents_below_min_chars, + ref allowed_scripts, + ref arithmetic_side_effects_allowed_binary, + ref arithmetic_side_effects_allowed_unary, + ref arithmetic_side_effects_allowed, + array_size_threshold, + avoid_breaking_exported_api, + ref await_holding_invalid_types, + cargo_ignore_publish, + cognitive_complexity_threshold, + ref disallowed_macros, + ref disallowed_methods, + ref disallowed_names, + ref disallowed_types, + ref doc_valid_idents, + enable_raw_pointer_heuristic_for_send, + enforce_iter_loop_reborrow, + ref enforced_import_renames, + enum_variant_name_threshold, + enum_variant_size_threshold, + excessive_nesting_threshold, + future_size_threshold, + ref ignore_interior_mutability, + large_error_threshold, + literal_representation_threshold, + matches_for_let_else, + max_fn_params_bools, + max_include_file_size, + max_struct_bools, + max_suggested_slice_pattern_length, + max_trait_bounds, + min_ident_chars_threshold, + missing_docs_in_crate_items, + ref msrv, + pass_by_value_size_limit, + semicolon_inside_block_ignore_singleline, + semicolon_outside_block_ignore_multiline, + single_char_binding_names_threshold, + stack_size_threshold, + ref standard_macro_braces, + struct_field_name_threshold, + suppress_restriction_lint_in_const, + too_large_for_stack, + too_many_arguments_threshold, + too_many_lines_threshold, + trivial_copy_size_limit, + type_complexity_threshold, + unnecessary_box_size, + unreadable_literal_lint_fractions, + upper_case_acronyms_aggressive, + vec_box_size_threshold, + verbose_bit_mask_threshold, + warn_on_all_wildcard_imports, + check_private_items, + + blacklisted_names: _, + cyclomatic_complexity_threshold: _, + } = *conf; + let msrv = || msrv.clone(); + register_removed_non_tool_lints(store); register_categories(store); @@ -521,7 +599,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: store.register_late_pass(|_| { Box::new(utils::internal_lints::compiler_lint_functions::CompilerLintFunctions::new()) }); - store.register_late_pass(|_| Box::new(utils::internal_lints::if_chain_style::IfChainStyle)); store.register_late_pass(|_| Box::new(utils::internal_lints::invalid_paths::InvalidPaths)); store.register_late_pass(|_| { Box::<utils::internal_lints::interning_defined_symbol::InterningDefinedSymbol>::default() @@ -537,9 +614,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: }); } - let arithmetic_side_effects_allowed = conf.arithmetic_side_effects_allowed.clone(); - let arithmetic_side_effects_allowed_binary = conf.arithmetic_side_effects_allowed_binary.clone(); - let arithmetic_side_effects_allowed_unary = conf.arithmetic_side_effects_allowed_unary.clone(); store.register_late_pass(move |_| { Box::new(operators::arithmetic_side_effects::ArithmeticSideEffects::new( arithmetic_side_effects_allowed @@ -557,16 +631,12 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: store.register_early_pass(|| Box::<utils::format_args_collector::FormatArgsCollector>::default()); store.register_late_pass(|_| Box::new(utils::dump_hir::DumpHir)); store.register_late_pass(|_| Box::new(utils::author::Author)); - let await_holding_invalid_types = conf.await_holding_invalid_types.clone(); store.register_late_pass(move |_| { Box::new(await_holding_invalid::AwaitHolding::new( await_holding_invalid_types.clone(), )) }); store.register_late_pass(|_| Box::new(serde_api::SerdeApi)); - let vec_box_size_threshold = conf.vec_box_size_threshold; - let type_complexity_threshold = conf.type_complexity_threshold; - let avoid_breaking_exported_api = conf.avoid_breaking_exported_api; store.register_late_pass(move |_| { Box::new(types::Types::new( vec_box_size_threshold, @@ -588,7 +658,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: store.register_late_pass(|_| Box::<significant_drop_tightening::SignificantDropTightening<'_>>::default()); store.register_late_pass(|_| Box::new(len_zero::LenZero)); store.register_late_pass(|_| Box::new(attrs::Attributes)); - store.register_late_pass(|_| Box::new(blocks_in_if_conditions::BlocksInIfConditions)); + store.register_late_pass(|_| Box::new(blocks_in_conditions::BlocksInConditions)); store.register_late_pass(|_| Box::new(unicode::Unicode)); store.register_late_pass(|_| Box::new(uninit_vec::UninitVec)); store.register_late_pass(|_| Box::new(unit_return_expecting_ord::UnitReturnExpectingOrd)); @@ -599,19 +669,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: store.register_late_pass(|_| Box::new(inconsistent_struct_constructor::InconsistentStructConstructor)); store.register_late_pass(|_| Box::new(non_octal_unix_permissions::NonOctalUnixPermissions)); store.register_early_pass(|| Box::new(unnecessary_self_imports::UnnecessarySelfImports)); - - let msrv = || conf.msrv.clone(); - let avoid_breaking_exported_api = conf.avoid_breaking_exported_api; - let allow_expect_in_tests = conf.allow_expect_in_tests; - let allow_unwrap_in_tests = conf.allow_unwrap_in_tests; - let suppress_restriction_lint_in_const = conf.suppress_restriction_lint_in_const; store.register_late_pass(move |_| Box::new(approx_const::ApproxConstant::new(msrv()))); - let allowed_dotfiles = conf - .allowed_dotfiles - .iter() - .cloned() - .chain(methods::DEFAULT_ALLOWED_DOTFILES.iter().copied().map(ToOwned::to_owned)) - .collect::<FxHashSet<_>>(); store.register_late_pass(move |_| { Box::new(methods::Methods::new( avoid_breaking_exported_api, @@ -622,7 +680,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: )) }); store.register_late_pass(move |_| Box::new(matches::Matches::new(msrv()))); - let matches_for_let_else = conf.matches_for_let_else; store.register_early_pass(move || Box::new(manual_non_exhaustive::ManualNonExhaustiveStruct::new(msrv()))); store.register_late_pass(move |_| Box::new(manual_non_exhaustive::ManualNonExhaustiveEnum::new(msrv()))); store.register_late_pass(move |_| Box::new(manual_strip::ManualStrip::new(msrv()))); @@ -639,7 +696,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: store.register_early_pass(move || Box::new(unnested_or_patterns::UnnestedOrPatterns::new(msrv()))); store.register_late_pass(|_| Box::new(size_of_in_element_count::SizeOfInElementCount)); store.register_late_pass(|_| Box::new(same_name_method::SameNameMethod)); - let max_suggested_slice_pattern_length = conf.max_suggested_slice_pattern_length; store.register_late_pass(move |_| { Box::new(index_refutable_slice::IndexRefutableSlice::new( max_suggested_slice_pattern_length, @@ -648,7 +704,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: }); store.register_late_pass(|_| Box::<shadow::Shadow>::default()); store.register_late_pass(|_| Box::new(unit_types::UnitTypes)); - let enforce_iter_loop_reborrow = conf.enforce_iter_loop_reborrow; store.register_late_pass(move |_| Box::new(loops::Loops::new(msrv(), enforce_iter_loop_reborrow))); store.register_late_pass(|_| Box::<main_recursion::MainRecursion>::default()); store.register_late_pass(|_| Box::new(lifetimes::Lifetimes)); @@ -662,18 +717,17 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: store.register_late_pass(|_| Box::new(no_effect::NoEffect)); store.register_late_pass(|_| Box::new(temporary_assignment::TemporaryAssignment)); store.register_late_pass(move |_| Box::new(transmute::Transmute::new(msrv()))); - let cognitive_complexity_threshold = conf.cognitive_complexity_threshold; store.register_late_pass(move |_| { Box::new(cognitive_complexity::CognitiveComplexity::new( cognitive_complexity_threshold, )) }); - let too_large_for_stack = conf.too_large_for_stack; store.register_late_pass(move |_| Box::new(escape::BoxedLocal { too_large_for_stack })); store.register_late_pass(move |_| { Box::new(vec::UselessVec { too_large_for_stack, msrv: msrv(), + span_to_lint_map: BTreeMap::new(), }) }); store.register_late_pass(|_| Box::new(panic_unimplemented::PanicUnimplemented)); @@ -684,18 +738,13 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: store.register_late_pass(|_| Box::new(empty_enum::EmptyEnum)); store.register_late_pass(|_| Box::new(invalid_upcast_comparisons::InvalidUpcastComparisons)); store.register_late_pass(|_| Box::<regex::Regex>::default()); - let ignore_interior_mutability = conf.ignore_interior_mutability.clone(); store.register_late_pass(move |_| Box::new(copies::CopyAndPaste::new(ignore_interior_mutability.clone()))); store.register_late_pass(|_| Box::new(copy_iterator::CopyIterator)); store.register_late_pass(|_| Box::new(format::UselessFormat)); store.register_late_pass(|_| Box::new(swap::Swap)); store.register_late_pass(|_| Box::new(overflow_check_conditional::OverflowCheckConditional)); store.register_late_pass(|_| Box::<new_without_default::NewWithoutDefault>::default()); - let disallowed_names = conf.disallowed_names.iter().cloned().collect::<FxHashSet<_>>(); - store.register_late_pass(move |_| Box::new(disallowed_names::DisallowedNames::new(disallowed_names.clone()))); - let too_many_arguments_threshold = conf.too_many_arguments_threshold; - let too_many_lines_threshold = conf.too_many_lines_threshold; - let large_error_threshold = conf.large_error_threshold; + store.register_late_pass(move |_| Box::new(disallowed_names::DisallowedNames::new(disallowed_names))); store.register_late_pass(move |_| { Box::new(functions::Functions::new( too_many_arguments_threshold, @@ -704,9 +753,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: avoid_breaking_exported_api, )) }); - let doc_valid_idents = conf.doc_valid_idents.iter().cloned().collect::<FxHashSet<_>>(); - let missing_docs_in_crate_items = conf.missing_docs_in_crate_items; - store.register_late_pass(move |_| Box::new(doc::DocMarkdown::new(doc_valid_idents.clone()))); + store.register_late_pass(move |_| Box::new(doc::Documentation::new(doc_valid_idents, check_private_items))); store.register_late_pass(|_| Box::new(neg_multiply::NegMultiply)); store.register_late_pass(|_| Box::new(let_if_seq::LetIfSeq)); store.register_late_pass(|_| Box::new(mixed_read_write_in_expression::EvalOrderDependence)); @@ -716,17 +763,17 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: store.register_late_pass(|_| Box::new(match_result_ok::MatchResultOk)); store.register_late_pass(|_| Box::new(partialeq_ne_impl::PartialEqNeImpl)); store.register_late_pass(|_| Box::new(unused_io_amount::UnusedIoAmount)); - let enum_variant_size_threshold = conf.enum_variant_size_threshold; store.register_late_pass(move |_| Box::new(large_enum_variant::LargeEnumVariant::new(enum_variant_size_threshold))); store.register_late_pass(|_| Box::new(explicit_write::ExplicitWrite)); store.register_late_pass(|_| Box::new(needless_pass_by_value::NeedlessPassByValue)); - let pass_by_ref_or_value = pass_by_ref_or_value::PassByRefOrValue::new( - conf.trivial_copy_size_limit, - conf.pass_by_value_size_limit, - conf.avoid_breaking_exported_api, - &sess.target, - ); - store.register_late_pass(move |_| Box::new(pass_by_ref_or_value)); + store.register_late_pass(move |tcx| { + Box::new(pass_by_ref_or_value::PassByRefOrValue::new( + trivial_copy_size_limit, + pass_by_value_size_limit, + avoid_breaking_exported_api, + tcx.sess.target.pointer_width, + )) + }); store.register_late_pass(|_| Box::new(ref_option_ref::RefOptionRef)); store.register_late_pass(|_| Box::new(infinite_iter::InfiniteIter)); store.register_late_pass(|_| Box::new(inline_fn_without_body::InlineFnWithoutBody)); @@ -746,7 +793,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: suppress_restriction_lint_in_const, )) }); - let ignore_interior_mutability = conf.ignore_interior_mutability.clone(); store.register_late_pass(move |_| Box::new(non_copy_const::NonCopyConst::new(ignore_interior_mutability.clone()))); store.register_late_pass(|_| Box::new(ptr_offset_with_cast::PtrOffsetWithCast)); store.register_late_pass(|_| Box::new(redundant_clone::RedundantClone)); @@ -755,10 +801,8 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: store.register_late_pass(|_| Box::new(assertions_on_constants::AssertionsOnConstants)); store.register_late_pass(|_| Box::new(assertions_on_result_states::AssertionsOnResultStates)); store.register_late_pass(|_| Box::new(inherent_to_string::InherentToString)); - let max_trait_bounds = conf.max_trait_bounds; store.register_late_pass(move |_| Box::new(trait_bounds::TraitBounds::new(max_trait_bounds, msrv()))); store.register_late_pass(|_| Box::new(comparison_chain::ComparisonChain)); - let ignore_interior_mutability = conf.ignore_interior_mutability.clone(); store.register_late_pass(move |_| Box::new(mut_key::MutableKeyType::new(ignore_interior_mutability.clone()))); store.register_early_pass(|| Box::new(reference::DerefAddrOf)); store.register_early_pass(|| Box::new(double_parens::DoubleParens)); @@ -779,21 +823,16 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: store.register_early_pass(|| Box::new(redundant_else::RedundantElse)); store.register_late_pass(|_| Box::new(create_dir::CreateDir)); store.register_early_pass(|| Box::new(needless_arbitrary_self_type::NeedlessArbitrarySelfType)); - let literal_representation_lint_fraction_readability = conf.unreadable_literal_lint_fractions; store.register_early_pass(move || { Box::new(literal_representation::LiteralDigitGrouping::new( - literal_representation_lint_fraction_readability, + unreadable_literal_lint_fractions, )) }); - let literal_representation_threshold = conf.literal_representation_threshold; store.register_early_pass(move || { Box::new(literal_representation::DecimalLiteralRepresentation::new( literal_representation_threshold, )) }); - let enum_variant_name_threshold = conf.enum_variant_name_threshold; - let struct_field_name_threshold = conf.struct_field_name_threshold; - let allow_private_module_inception = conf.allow_private_module_inception; store.register_late_pass(move |_| { Box::new(item_name_repetitions::ItemNameRepetitions::new( enum_variant_name_threshold, @@ -803,7 +842,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: )) }); store.register_early_pass(|| Box::new(tabs_in_doc_comments::TabsInDocComments)); - let upper_case_acronyms_aggressive = conf.upper_case_acronyms_aggressive; store.register_late_pass(move |_| { Box::new(upper_case_acronyms::UpperCaseAcronyms::new( avoid_breaking_exported_api, @@ -815,15 +853,12 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: store.register_late_pass(|_| Box::new(mutable_debug_assertion::DebugAssertWithMutCall)); store.register_late_pass(|_| Box::new(exit::Exit)); store.register_late_pass(|_| Box::new(to_digit_is_some::ToDigitIsSome)); - let array_size_threshold = u128::from(conf.array_size_threshold); - store.register_late_pass(move |_| Box::new(large_stack_arrays::LargeStackArrays::new(array_size_threshold))); - store.register_late_pass(move |_| Box::new(large_const_arrays::LargeConstArrays::new(array_size_threshold))); + store.register_late_pass(move |_| Box::new(large_stack_arrays::LargeStackArrays::new(array_size_threshold.into()))); + store.register_late_pass(move |_| Box::new(large_const_arrays::LargeConstArrays::new(array_size_threshold.into()))); store.register_late_pass(|_| Box::new(floating_point_arithmetic::FloatingPointArithmetic)); store.register_late_pass(|_| Box::new(as_conversions::AsConversions)); store.register_late_pass(|_| Box::new(let_underscore::LetUnderscore)); store.register_early_pass(|| Box::<single_component_path_imports::SingleComponentPathImports>::default()); - let max_fn_params_bools = conf.max_fn_params_bools; - let max_struct_bools = conf.max_struct_bools; store.register_late_pass(move |_| { Box::new(excessive_bools::ExcessiveBools::new( max_struct_bools, @@ -831,36 +866,30 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: )) }); store.register_early_pass(|| Box::new(option_env_unwrap::OptionEnvUnwrap)); - let warn_on_all_wildcard_imports = conf.warn_on_all_wildcard_imports; store.register_late_pass(move |_| Box::new(wildcard_imports::WildcardImports::new(warn_on_all_wildcard_imports))); store.register_late_pass(|_| Box::<redundant_pub_crate::RedundantPubCrate>::default()); store.register_late_pass(|_| Box::new(unnamed_address::UnnamedAddress)); store.register_late_pass(|_| Box::<dereference::Dereferencing<'_>>::default()); store.register_late_pass(|_| Box::new(option_if_let_else::OptionIfLetElse)); store.register_late_pass(|_| Box::new(future_not_send::FutureNotSend)); - let future_size_threshold = conf.future_size_threshold; store.register_late_pass(move |_| Box::new(large_futures::LargeFuture::new(future_size_threshold))); store.register_late_pass(|_| Box::new(if_let_mutex::IfLetMutex)); store.register_late_pass(|_| Box::new(if_not_else::IfNotElse)); store.register_late_pass(|_| Box::new(equatable_if_let::PatternEquality)); store.register_late_pass(|_| Box::new(manual_async_fn::ManualAsyncFn)); store.register_late_pass(|_| Box::new(panic_in_result_fn::PanicInResultFn)); - let single_char_binding_names_threshold = conf.single_char_binding_names_threshold; store.register_early_pass(move || { Box::new(non_expressive_names::NonExpressiveNames { single_char_binding_names_threshold, }) }); - let macro_matcher = conf.standard_macro_braces.iter().cloned().collect::<FxHashSet<_>>(); - store.register_early_pass(move || Box::new(nonstandard_macro_braces::MacroBraces::new(¯o_matcher))); + store.register_early_pass(move || Box::new(nonstandard_macro_braces::MacroBraces::new(standard_macro_braces))); store.register_late_pass(|_| Box::<macro_use::MacroUseImports>::default()); store.register_late_pass(|_| Box::new(pattern_type_mismatch::PatternTypeMismatch)); store.register_late_pass(|_| Box::new(unwrap_in_result::UnwrapInResult)); store.register_late_pass(|_| Box::new(semicolon_if_nothing_returned::SemicolonIfNothingReturned)); store.register_late_pass(|_| Box::new(async_yields_async::AsyncYieldsAsync)); - let disallowed_macros = conf.disallowed_macros.clone(); store.register_late_pass(move |_| Box::new(disallowed_macros::DisallowedMacros::new(disallowed_macros.clone()))); - let disallowed_methods = conf.disallowed_methods.clone(); store.register_late_pass(move |_| Box::new(disallowed_methods::DisallowedMethods::new(disallowed_methods.clone()))); store.register_early_pass(|| Box::new(asm_syntax::InlineAsmX86AttSyntax)); store.register_early_pass(|| Box::new(asm_syntax::InlineAsmX86IntelSyntax)); @@ -875,36 +904,30 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: store.register_late_pass(|_| Box::new(bool_assert_comparison::BoolAssertComparison)); store.register_early_pass(move || Box::new(module_style::ModStyle)); store.register_late_pass(|_| Box::<unused_async::UnusedAsync>::default()); - let disallowed_types = conf.disallowed_types.clone(); store.register_late_pass(move |_| Box::new(disallowed_types::DisallowedTypes::new(disallowed_types.clone()))); - let import_renames = conf.enforced_import_renames.clone(); store.register_late_pass(move |_| { Box::new(missing_enforced_import_rename::ImportRename::new( - import_renames.clone(), + enforced_import_renames.clone(), )) }); - let scripts = conf.allowed_scripts.clone(); - store.register_early_pass(move || Box::new(disallowed_script_idents::DisallowedScriptIdents::new(&scripts))); + store.register_early_pass(move || Box::new(disallowed_script_idents::DisallowedScriptIdents::new(allowed_scripts))); store.register_late_pass(|_| Box::new(strlen_on_c_strings::StrlenOnCStrings)); store.register_late_pass(move |_| Box::new(self_named_constructors::SelfNamedConstructors)); store.register_late_pass(move |_| Box::new(iter_not_returning_iterator::IterNotReturningIterator)); store.register_late_pass(move |_| Box::new(manual_assert::ManualAssert)); - let enable_raw_pointer_heuristic_for_send = conf.enable_raw_pointer_heuristic_for_send; store.register_late_pass(move |_| { Box::new(non_send_fields_in_send_ty::NonSendFieldInSendTy::new( enable_raw_pointer_heuristic_for_send, )) }); - let accept_comment_above_statement = conf.accept_comment_above_statement; - let accept_comment_above_attributes = conf.accept_comment_above_attributes; store.register_late_pass(move |_| { Box::new(undocumented_unsafe_blocks::UndocumentedUnsafeBlocks::new( accept_comment_above_statement, accept_comment_above_attributes, )) }); - let allow_mixed_uninlined = conf.allow_mixed_uninlined_format_args; - store.register_late_pass(move |_| Box::new(format_args::FormatArgs::new(msrv(), allow_mixed_uninlined))); + store + .register_late_pass(move |_| Box::new(format_args::FormatArgs::new(msrv(), allow_mixed_uninlined_format_args))); store.register_late_pass(|_| Box::new(trailing_empty_array::TrailingEmptyArray)); store.register_early_pass(|| Box::new(octal_escapes::OctalEscapes)); store.register_late_pass(|_| Box::new(needless_late_init::NeedlessLateInit)); @@ -914,11 +937,8 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: store.register_late_pass(move |_| Box::new(manual_bits::ManualBits::new(msrv()))); store.register_late_pass(|_| Box::new(default_union_representation::DefaultUnionRepresentation)); store.register_late_pass(|_| Box::<only_used_in_recursion::OnlyUsedInRecursion>::default()); - let allow_dbg_in_tests = conf.allow_dbg_in_tests; store.register_late_pass(move |_| Box::new(dbg_macro::DbgMacro::new(allow_dbg_in_tests))); - let allow_print_in_tests = conf.allow_print_in_tests; store.register_late_pass(move |_| Box::new(write::Write::new(allow_print_in_tests))); - let cargo_ignore_publish = conf.cargo_ignore_publish; store.register_late_pass(move |_| { Box::new(cargo::Cargo { ignore_publish: cargo_ignore_publish, @@ -929,7 +949,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: store.register_late_pass(|_| Box::new(unnecessary_owned_empty_strings::UnnecessaryOwnedEmptyStrings)); store.register_early_pass(|| Box::new(pub_use::PubUse)); store.register_late_pass(|_| Box::new(format_push_string::FormatPushString)); - let max_include_file_size = conf.max_include_file_size; store.register_late_pass(move |_| Box::new(large_include_file::LargeIncludeFile::new(max_include_file_size))); store.register_late_pass(|_| Box::new(strings::TrimSplitWhitespace)); store.register_late_pass(|_| Box::new(rc_clone_in_vec_init::RcCloneInVecInit)); @@ -942,7 +961,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: store.register_late_pass(|_| Box::new(default_instead_of_iter_empty::DefaultIterEmpty)); store.register_late_pass(move |_| Box::new(manual_rem_euclid::ManualRemEuclid::new(msrv()))); store.register_late_pass(move |_| Box::new(manual_retain::ManualRetain::new(msrv()))); - let verbose_bit_mask_threshold = conf.verbose_bit_mask_threshold; store.register_late_pass(move |_| Box::new(operators::Operators::new(verbose_bit_mask_threshold))); store.register_late_pass(|_| Box::<std_instead_of_core::StdReexports>::default()); store.register_late_pass(move |_| Box::new(instant_subtraction::InstantSubtraction::new(msrv()))); @@ -959,8 +977,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: store.register_late_pass(|_| Box::new(from_raw_with_void_ptr::FromRawWithVoidPtr)); store.register_late_pass(|_| Box::new(suspicious_xor_used_as_pow::ConfusingXorAndPow)); store.register_late_pass(move |_| Box::new(manual_is_ascii_check::ManualIsAsciiCheck::new(msrv()))); - let semicolon_inside_block_ignore_singleline = conf.semicolon_inside_block_ignore_singleline; - let semicolon_outside_block_ignore_multiline = conf.semicolon_outside_block_ignore_multiline; store.register_late_pass(move |_| { Box::new(semicolon_block::SemicolonBlock::new( semicolon_inside_block_ignore_singleline, @@ -983,7 +999,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: store.register_late_pass(|_| Box::new(allow_attributes::AllowAttribute)); store.register_late_pass(move |_| Box::new(manual_main_separator_str::ManualMainSeparatorStr::new(msrv()))); store.register_late_pass(|_| Box::new(unnecessary_struct_initialization::UnnecessaryStruct)); - let unnecessary_box_size = conf.unnecessary_box_size; store.register_late_pass(move |_| { Box::new(unnecessary_box_returns::UnnecessaryBoxReturns::new( avoid_breaking_exported_api, @@ -993,8 +1008,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: store.register_late_pass(|_| Box::new(lines_filter_map_ok::LinesFilterMapOk)); store.register_late_pass(|_| Box::new(tests_outside_test_module::TestsOutsideTestModule)); store.register_late_pass(|_| Box::new(manual_slice_size_calculation::ManualSliceSizeCalculation)); - store.register_early_pass(|| Box::new(suspicious_doc_comments::SuspiciousDocComments)); - let excessive_nesting_threshold = conf.excessive_nesting_threshold; store.register_early_pass(move || { Box::new(excessive_nesting::ExcessiveNesting { excessive_nesting_threshold, @@ -1010,15 +1023,12 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: store.register_late_pass(|_| Box::new(redundant_type_annotations::RedundantTypeAnnotations)); store.register_late_pass(|_| Box::new(arc_with_non_send_sync::ArcWithNonSendSync)); store.register_late_pass(|_| Box::new(needless_if::NeedlessIf)); - let allowed_idents_below_min_chars = conf.allowed_idents_below_min_chars.clone(); - let min_ident_chars_threshold = conf.min_ident_chars_threshold; store.register_late_pass(move |_| { Box::new(min_ident_chars::MinIdentChars { allowed_idents_below_min_chars: allowed_idents_below_min_chars.clone(), min_ident_chars_threshold, }) }); - let stack_size_threshold = conf.stack_size_threshold; store.register_late_pass(move |_| Box::new(large_stack_frames::LargeStackFrames::new(stack_size_threshold))); store.register_late_pass(|_| Box::new(single_range_in_vec_init::SingleRangeInVecInit)); store.register_late_pass(move |_| { @@ -1033,10 +1043,9 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: def_id_to_usage: rustc_data_structures::fx::FxHashMap::default(), }) }); - let needless_raw_string_hashes_allow_one = conf.allow_one_hash_in_raw_strings; store.register_early_pass(move || { Box::new(raw_strings::RawStrings { - needless_raw_string_hashes_allow_one, + allow_one_hash_in_raw_strings, }) }); store.register_late_pass(|_| Box::new(manual_range_patterns::ManualRangePatterns)); @@ -1045,8 +1054,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: store.register_late_pass(|_| Box::new(manual_float_methods::ManualFloatMethods)); store.register_late_pass(|_| Box::new(four_forward_slashes::FourForwardSlashes)); store.register_late_pass(|_| Box::new(error_impl_error::ErrorImplError)); - let absolute_paths_max_segments = conf.absolute_paths_max_segments; - let absolute_paths_allowed_crates = conf.absolute_paths_allowed_crates.clone(); store.register_late_pass(move |_| { Box::new(absolute_paths::AbsolutePaths { absolute_paths_max_segments, @@ -1066,6 +1073,11 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: }); store.register_late_pass(move |_| Box::new(manual_hash_one::ManualHashOne::new(msrv()))); store.register_late_pass(|_| Box::new(iter_without_into_iter::IterWithoutIntoIter)); + store.register_late_pass(|_| Box::new(iter_over_hash_type::IterOverHashType)); + store.register_late_pass(|_| Box::new(impl_hash_with_borrow_str_and_bytes::ImplHashWithBorrowStrBytes)); + store.register_late_pass(|_| Box::new(repeat_vec_with_capacity::RepeatVecWithCapacity)); + store.register_late_pass(|_| Box::new(uninhabited_references::UninhabitedReferences)); + store.register_late_pass(|_| Box::new(ineffective_open_options::IneffectiveOpenOptions)); // add lints here, do not remove this comment, it's used in `new_lint` } diff --git a/src/tools/clippy/clippy_lints/src/lifetimes.rs b/src/tools/clippy/clippy_lints/src/lifetimes.rs index 7517003be..ffef84d1f 100644 --- a/src/tools/clippy/clippy_lints/src/lifetimes.rs +++ b/src/tools/clippy/clippy_lints/src/lifetimes.rs @@ -18,10 +18,10 @@ use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::hir::map::Map; use rustc_middle::hir::nested_filter as middle_nested_filter; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::def_id::LocalDefId; -use rustc_span::Span; use rustc_span::symbol::{kw, Ident, Symbol}; +use rustc_span::Span; declare_clippy_lint! { /// ### What it does @@ -195,7 +195,7 @@ fn check_fn_inner<'tcx>( .iter() // In principle, the result of the call to `Node::ident` could be `unwrap`ped, as `DefId` should refer to a // `Node::GenericParam`. - .filter_map(|&def_id| cx.tcx.hir().get_by_def_id(def_id).ident()) + .filter_map(|&def_id| cx.tcx.hir_node_by_def_id(def_id).ident()) .map(|ident| ident.to_string()) .collect::<Vec<_>>() .join(", "); @@ -310,20 +310,17 @@ fn elision_suggestions( // elision doesn't work for explicit self types, see rust-lang/rust#69064 fn explicit_self_type<'tcx>(cx: &LateContext<'tcx>, func: &FnDecl<'tcx>, ident: Option<Ident>) -> bool { - if_chain! { - if let Some(ident) = ident; - if ident.name == kw::SelfLower; - if !func.implicit_self.has_implicit_self(); - - if let Some(self_ty) = func.inputs.first(); - then { - let mut visitor = RefVisitor::new(cx); - visitor.visit_ty(self_ty); - - !visitor.all_lts().is_empty() - } else { - false - } + if let Some(ident) = ident + && ident.name == kw::SelfLower + && !func.implicit_self.has_implicit_self() + && let Some(self_ty) = func.inputs.first() + { + let mut visitor = RefVisitor::new(cx); + visitor.visit_ty(self_ty); + + !visitor.all_lts().is_empty() + } else { + false } } diff --git a/src/tools/clippy/clippy_lints/src/lines_filter_map_ok.rs b/src/tools/clippy/clippy_lints/src/lines_filter_map_ok.rs index 0a5f5a80c..8a0955147 100644 --- a/src/tools/clippy/clippy_lints/src/lines_filter_map_ok.rs +++ b/src/tools/clippy/clippy_lints/src/lines_filter_map_ok.rs @@ -4,7 +4,7 @@ use clippy_utils::{is_diag_item_method, is_trait_method, match_def_path, path_to use rustc_errors::Applicability; use rustc_hir::{Body, Closure, Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { @@ -53,18 +53,45 @@ declare_clippy_lint! { #[clippy::version = "1.70.0"] pub LINES_FILTER_MAP_OK, suspicious, - "filtering `std::io::Lines` with `filter_map()` or `flat_map()` might cause an infinite loop" + "filtering `std::io::Lines` with `filter_map()`, `flat_map()`, or `flatten()` might cause an infinite loop" } declare_lint_pass!(LinesFilterMapOk => [LINES_FILTER_MAP_OK]); impl LateLintPass<'_> for LinesFilterMapOk { fn check_expr(&mut self, cx: &LateContext<'_>, expr: &Expr<'_>) { - if let ExprKind::MethodCall(fm_method, fm_receiver, [fm_arg], fm_span) = expr.kind + if let ExprKind::MethodCall(fm_method, fm_receiver, fm_args, fm_span) = expr.kind && is_trait_method(cx, expr, sym::Iterator) - && (fm_method.ident.as_str() == "filter_map" || fm_method.ident.as_str() == "flat_map") + && let fm_method_str = fm_method.ident.as_str() + && matches!(fm_method_str, "filter_map" | "flat_map" | "flatten") && is_type_diagnostic_item(cx, cx.typeck_results().expr_ty_adjusted(fm_receiver), sym::IoLines) + && should_lint(cx, fm_args, fm_method_str) { - let lint = match &fm_arg.kind { + span_lint_and_then( + cx, + LINES_FILTER_MAP_OK, + fm_span, + &format!("`{fm_method_str}()` will run forever if the iterator repeatedly produces an `Err`",), + |diag| { + diag.span_note( + fm_receiver.span, + "this expression returning a `std::io::Lines` may produce an infinite number of `Err` in case of a read error"); + diag.span_suggestion( + fm_span, + "replace with", + "map_while(Result::ok)", + Applicability::MaybeIncorrect, + ); + }, + ); + } + } +} + +fn should_lint(cx: &LateContext<'_>, args: &[Expr<'_>], method_str: &str) -> bool { + match args { + [] => method_str == "flatten", + [fm_arg] => { + match &fm_arg.kind { // Detect `Result::ok` ExprKind::Path(qpath) => cx .qpath_res(qpath, fm_arg.hir_id) @@ -86,29 +113,8 @@ impl LateLintPass<'_> for LinesFilterMapOk { } }, _ => false, - }; - if lint { - span_lint_and_then( - cx, - LINES_FILTER_MAP_OK, - fm_span, - &format!( - "`{}()` will run forever if the iterator repeatedly produces an `Err`", - fm_method.ident - ), - |diag| { - diag.span_note( - fm_receiver.span, - "this expression returning a `std::io::Lines` may produce an infinite number of `Err` in case of a read error"); - diag.span_suggestion( - fm_span, - "replace with", - "map_while(Result::ok)", - Applicability::MaybeIncorrect, - ); - }, - ); } - } + }, + _ => false, } } diff --git a/src/tools/clippy/clippy_lints/src/literal_representation.rs b/src/tools/clippy/clippy_lints/src/literal_representation.rs index 2c14bb72a..f33151cf4 100644 --- a/src/tools/clippy/clippy_lints/src/literal_representation.rs +++ b/src/tools/clippy/clippy_lints/src/literal_representation.rs @@ -4,13 +4,12 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::numeric_literal::{NumericLiteral, Radix}; use clippy_utils::source::snippet_opt; -use if_chain::if_chain; use rustc_ast::ast::{Expr, ExprKind, LitKind}; use rustc_ast::token; use rustc_errors::Applicability; use rustc_lint::{EarlyContext, EarlyLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::Span; use std::iter; @@ -255,56 +254,48 @@ impl LiteralDigitGrouping { } fn check_lit(self, cx: &EarlyContext<'_>, lit: token::Lit, span: Span) { - if_chain! { - if let Some(src) = snippet_opt(cx, span); - if let Ok(lit_kind) = LitKind::from_token_lit(lit); - if let Some(mut num_lit) = NumericLiteral::from_lit_kind(&src, &lit_kind); - then { - if !Self::check_for_mistyped_suffix(cx, span, &mut num_lit) { - return; - } + if let Some(src) = snippet_opt(cx, span) + && let Ok(lit_kind) = LitKind::from_token_lit(lit) + && let Some(mut num_lit) = NumericLiteral::from_lit_kind(&src, &lit_kind) + { + if !Self::check_for_mistyped_suffix(cx, span, &mut num_lit) { + return; + } + + if Self::is_literal_uuid_formatted(&num_lit) { + return; + } - if Self::is_literal_uuid_formatted(&num_lit) { - return; + let result = (|| { + let integral_group_size = Self::get_group_size(num_lit.integer.split('_'), num_lit.radix, true)?; + if let Some(fraction) = num_lit.fraction { + let fractional_group_size = + Self::get_group_size(fraction.rsplit('_'), num_lit.radix, self.lint_fraction_readability)?; + + let consistent = Self::parts_consistent( + integral_group_size, + fractional_group_size, + num_lit.integer.len(), + fraction.len(), + ); + if !consistent { + return Err(WarningType::InconsistentDigitGrouping); + }; } - let result = (|| { - - let integral_group_size = Self::get_group_size(num_lit.integer.split('_'), num_lit.radix, true)?; - if let Some(fraction) = num_lit.fraction { - let fractional_group_size = Self::get_group_size( - fraction.rsplit('_'), - num_lit.radix, - self.lint_fraction_readability)?; - - let consistent = Self::parts_consistent(integral_group_size, - fractional_group_size, - num_lit.integer.len(), - fraction.len()); - if !consistent { - return Err(WarningType::InconsistentDigitGrouping); - }; - } + Ok(()) + })(); - Ok(()) - })(); - - - if let Err(warning_type) = result { - let should_warn = match warning_type { - | WarningType::UnreadableLiteral - | WarningType::InconsistentDigitGrouping - | WarningType::UnusualByteGroupings - | WarningType::LargeDigitGroups => { - !span.from_expansion() - } - WarningType::DecimalRepresentation | WarningType::MistypedLiteralSuffix => { - true - } - }; - if should_warn { - warning_type.display(num_lit.format(), cx, span); - } + if let Err(warning_type) = result { + let should_warn = match warning_type { + WarningType::UnreadableLiteral + | WarningType::InconsistentDigitGrouping + | WarningType::UnusualByteGroupings + | WarningType::LargeDigitGroups => !span.from_expansion(), + WarningType::DecimalRepresentation | WarningType::MistypedLiteralSuffix => true, + }; + if should_warn { + warning_type.display(num_lit.format(), cx, span); } } } @@ -478,20 +469,18 @@ impl DecimalLiteralRepresentation { } fn check_lit(self, cx: &EarlyContext<'_>, lit: token::Lit, span: Span) { // Lint integral literals. - if_chain! { - if let Ok(lit_kind) = LitKind::from_token_lit(lit); - if let LitKind::Int(val, _) = lit_kind; - if let Some(src) = snippet_opt(cx, span); - if let Some(num_lit) = NumericLiteral::from_lit_kind(&src, &lit_kind); - if num_lit.radix == Radix::Decimal; - if val >= u128::from(self.threshold); - then { - let hex = format!("{val:#X}"); - let num_lit = NumericLiteral::new(&hex, num_lit.suffix, false); - let _: Result<(), ()> = Self::do_lint(num_lit.integer).map_err(|warning_type| { - warning_type.display(num_lit.format(), cx, span); - }); - } + if let Ok(lit_kind) = LitKind::from_token_lit(lit) + && let LitKind::Int(val, _) = lit_kind + && let Some(src) = snippet_opt(cx, span) + && let Some(num_lit) = NumericLiteral::from_lit_kind(&src, &lit_kind) + && num_lit.radix == Radix::Decimal + && val >= u128::from(self.threshold) + { + let hex = format!("{val:#X}"); + let num_lit = NumericLiteral::new(&hex, num_lit.suffix, false); + let _: Result<(), ()> = Self::do_lint(num_lit.integer).map_err(|warning_type| { + warning_type.display(num_lit.format(), cx, span); + }); } } diff --git a/src/tools/clippy/clippy_lints/src/loops/explicit_counter_loop.rs b/src/tools/clippy/clippy_lints/src/loops/explicit_counter_loop.rs index 1953ee8a7..277062a84 100644 --- a/src/tools/clippy/clippy_lints/src/loops/explicit_counter_loop.rs +++ b/src/tools/clippy/clippy_lints/src/loops/explicit_counter_loop.rs @@ -2,7 +2,6 @@ use super::{make_iterator_snippet, IncrementVisitor, InitializeVisitor, EXPLICIT use clippy_utils::diagnostics::{span_lint_and_sugg, span_lint_and_then}; use clippy_utils::source::snippet_with_applicability; use clippy_utils::{get_enclosing_block, is_integer_const}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::intravisit::{walk_block, walk_expr}; use rustc_hir::{Expr, Pat}; @@ -30,59 +29,57 @@ pub(super) fn check<'tcx>( let mut initialize_visitor = InitializeVisitor::new(cx, expr, id); walk_block(&mut initialize_visitor, block); - if_chain! { - if let Some((name, ty, initializer)) = initialize_visitor.get_result(); - if is_integer_const(cx, initializer, 0); - then { - let mut applicability = Applicability::MaybeIncorrect; - let span = expr.span.with_hi(arg.span.hi()); + if let Some((name, ty, initializer)) = initialize_visitor.get_result() + && is_integer_const(cx, initializer, 0) + { + let mut applicability = Applicability::MaybeIncorrect; + let span = expr.span.with_hi(arg.span.hi()); - let int_name = match ty.map(Ty::kind) { - // usize or inferred - Some(ty::Uint(UintTy::Usize)) | None => { - span_lint_and_sugg( - cx, - EXPLICIT_COUNTER_LOOP, - span, - &format!("the variable `{name}` is used as a loop counter"), - "consider using", - format!( - "for ({name}, {}) in {}.enumerate()", - snippet_with_applicability(cx, pat.span, "item", &mut applicability), - make_iterator_snippet(cx, arg, &mut applicability), - ), - applicability, - ); - return; - } - Some(ty::Int(int_ty)) => int_ty.name_str(), - Some(ty::Uint(uint_ty)) => uint_ty.name_str(), - _ => return, - }; + let int_name = match ty.map(Ty::kind) { + // usize or inferred + Some(ty::Uint(UintTy::Usize)) | None => { + span_lint_and_sugg( + cx, + EXPLICIT_COUNTER_LOOP, + span, + &format!("the variable `{name}` is used as a loop counter"), + "consider using", + format!( + "for ({name}, {}) in {}.enumerate()", + snippet_with_applicability(cx, pat.span, "item", &mut applicability), + make_iterator_snippet(cx, arg, &mut applicability), + ), + applicability, + ); + return; + }, + Some(ty::Int(int_ty)) => int_ty.name_str(), + Some(ty::Uint(uint_ty)) => uint_ty.name_str(), + _ => return, + }; - span_lint_and_then( - cx, - EXPLICIT_COUNTER_LOOP, - span, - &format!("the variable `{name}` is used as a loop counter"), - |diag| { - diag.span_suggestion( - span, - "consider using", - format!( - "for ({name}, {}) in (0_{int_name}..).zip({})", - snippet_with_applicability(cx, pat.span, "item", &mut applicability), - make_iterator_snippet(cx, arg, &mut applicability), - ), - applicability, - ); + span_lint_and_then( + cx, + EXPLICIT_COUNTER_LOOP, + span, + &format!("the variable `{name}` is used as a loop counter"), + |diag| { + diag.span_suggestion( + span, + "consider using", + format!( + "for ({name}, {}) in (0_{int_name}..).zip({})", + snippet_with_applicability(cx, pat.span, "item", &mut applicability), + make_iterator_snippet(cx, arg, &mut applicability), + ), + applicability, + ); - diag.note(format!( - "`{name}` is of type `{int_name}`, making it ineligible for `Iterator::enumerate`" - )); - }, - ); - } + diag.note(format!( + "`{name}` is of type `{int_name}`, making it ineligible for `Iterator::enumerate`" + )); + }, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/loops/explicit_iter_loop.rs b/src/tools/clippy/clippy_lints/src/loops/explicit_iter_loop.rs index 1c2b7a169..c79800608 100644 --- a/src/tools/clippy/clippy_lints/src/loops/explicit_iter_loop.rs +++ b/src/tools/clippy/clippy_lints/src/loops/explicit_iter_loop.rs @@ -118,7 +118,7 @@ fn is_ref_iterable<'tcx>( .liberate_late_bound_regions(fn_id, cx.tcx.fn_sig(fn_id).skip_binder()) && let &[req_self_ty, req_res_ty] = &**sig.inputs_and_output && let param_env = cx.tcx.param_env(fn_id) - && implements_trait_with_env(cx.tcx, param_env, req_self_ty, trait_id, &[]) + && implements_trait_with_env(cx.tcx, param_env, req_self_ty, trait_id, fn_id, &[]) && let Some(into_iter_ty) = make_normalized_projection_with_regions(cx.tcx, param_env, trait_id, sym!(IntoIter), [req_self_ty]) && let req_res_ty = normalize_with_regions(cx.tcx, param_env, req_res_ty) diff --git a/src/tools/clippy/clippy_lints/src/loops/infinite_loop.rs b/src/tools/clippy/clippy_lints/src/loops/infinite_loop.rs new file mode 100644 index 000000000..9b88dd76e --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/loops/infinite_loop.rs @@ -0,0 +1,125 @@ +use clippy_utils::diagnostics::span_lint_and_then; +use clippy_utils::{fn_def_id, is_lint_allowed}; +use hir::intravisit::{walk_expr, Visitor}; +use hir::{Expr, ExprKind, FnRetTy, FnSig, Node}; +use rustc_ast::Label; +use rustc_errors::Applicability; +use rustc_hir as hir; +use rustc_lint::LateContext; + +use super::INFINITE_LOOP; + +pub(super) fn check<'tcx>( + cx: &LateContext<'tcx>, + expr: &Expr<'_>, + loop_block: &'tcx hir::Block<'_>, + label: Option<Label>, +) { + if is_lint_allowed(cx, INFINITE_LOOP, expr.hir_id) { + return; + } + + // Skip check if this loop is not in a function/method/closure. (In some weird case) + let Some(parent_fn_ret) = get_parent_fn_ret_ty(cx, expr) else { + return; + }; + // Or, its parent function is already returning `Never` + if matches!( + parent_fn_ret, + FnRetTy::Return(hir::Ty { + kind: hir::TyKind::Never, + .. + }) + ) { + return; + } + + let mut loop_visitor = LoopVisitor { + cx, + label, + is_finite: false, + loop_depth: 0, + }; + loop_visitor.visit_block(loop_block); + + let is_finite_loop = loop_visitor.is_finite; + + if !is_finite_loop { + span_lint_and_then(cx, INFINITE_LOOP, expr.span, "infinite loop detected", |diag| { + if let FnRetTy::DefaultReturn(ret_span) = parent_fn_ret { + diag.span_suggestion( + ret_span, + "if this is intentional, consider specifing `!` as function return", + " -> !", + Applicability::MaybeIncorrect, + ); + } else { + diag.help("if this is not intended, try adding a `break` or `return` condition in the loop"); + } + }); + } +} + +fn get_parent_fn_ret_ty<'tcx>(cx: &LateContext<'tcx>, expr: &Expr<'_>) -> Option<FnRetTy<'tcx>> { + for (_, parent_node) in cx.tcx.hir().parent_iter(expr.hir_id) { + match parent_node { + Node::Item(hir::Item { + kind: hir::ItemKind::Fn(FnSig { decl, .. }, _, _), + .. + }) + | Node::TraitItem(hir::TraitItem { + kind: hir::TraitItemKind::Fn(FnSig { decl, .. }, _), + .. + }) + | Node::ImplItem(hir::ImplItem { + kind: hir::ImplItemKind::Fn(FnSig { decl, .. }, _), + .. + }) + | Node::Expr(Expr { + kind: ExprKind::Closure(hir::Closure { fn_decl: decl, .. }), + .. + }) => return Some(decl.output), + _ => (), + } + } + None +} + +struct LoopVisitor<'hir, 'tcx> { + cx: &'hir LateContext<'tcx>, + label: Option<Label>, + loop_depth: usize, + is_finite: bool, +} + +impl<'hir> Visitor<'hir> for LoopVisitor<'hir, '_> { + fn visit_expr(&mut self, ex: &'hir Expr<'_>) { + match &ex.kind { + ExprKind::Break(hir::Destination { label, .. }, ..) => { + // Assuming breaks the loop when `loop_depth` is 0, + // as it could only means this `break` breaks current loop or any of its upper loop. + // Or, the depth is not zero but the label is matched. + if self.loop_depth == 0 || (label.is_some() && *label == self.label) { + self.is_finite = true; + } + }, + ExprKind::Ret(..) => self.is_finite = true, + ExprKind::Loop(..) => { + self.loop_depth += 1; + walk_expr(self, ex); + self.loop_depth = self.loop_depth.saturating_sub(1); + }, + _ => { + // Calls to a function that never return + if let Some(did) = fn_def_id(self.cx, ex) { + let fn_ret_ty = self.cx.tcx.fn_sig(did).skip_binder().output().skip_binder(); + if fn_ret_ty.is_never() { + self.is_finite = true; + return; + } + } + walk_expr(self, ex); + }, + } + } +} diff --git a/src/tools/clippy/clippy_lints/src/loops/manual_find.rs b/src/tools/clippy/clippy_lints/src/loops/manual_find.rs index a9a9058c9..d484ce40d 100644 --- a/src/tools/clippy/clippy_lints/src/loops/manual_find.rs +++ b/src/tools/clippy/clippy_lints/src/loops/manual_find.rs @@ -4,7 +4,6 @@ use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::source::snippet_with_applicability; use clippy_utils::ty::implements_trait; use clippy_utils::{higher, is_res_lang_ctor, path_res, peel_blocks_with_stmt}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::def::Res; use rustc_hir::lang_items::LangItem; @@ -23,77 +22,79 @@ pub(super) fn check<'tcx>( let inner_expr = peel_blocks_with_stmt(body); // Check for the specific case that the result is returned and optimize suggestion for that (more // cases can be added later) - if_chain! { - if let Some(higher::If { cond, then, r#else: None, }) = higher::If::hir(inner_expr); - if let Some(binding_id) = get_binding(pat); - if let ExprKind::Block(block, _) = then.kind; - if let [stmt] = block.stmts; - if let StmtKind::Semi(semi) = stmt.kind; - if let ExprKind::Ret(Some(ret_value)) = semi.kind; - if let ExprKind::Call(ctor, [inner_ret]) = ret_value.kind; - if is_res_lang_ctor(cx, path_res(cx, ctor), LangItem::OptionSome); - if path_res(cx, inner_ret) == Res::Local(binding_id); - if let Some((last_stmt, last_ret)) = last_stmt_and_ret(cx, expr); - then { - let mut applicability = Applicability::MachineApplicable; - let mut snippet = make_iterator_snippet(cx, arg, &mut applicability); - // Checks if `pat` is a single reference to a binding (`&x`) - let is_ref_to_binding = - matches!(pat.kind, PatKind::Ref(inner, _) if matches!(inner.kind, PatKind::Binding(..))); - // If `pat` is not a binding or a reference to a binding (`x` or `&x`) - // we need to map it to the binding returned by the function (i.e. `.map(|(x, _)| x)`) - if !(matches!(pat.kind, PatKind::Binding(..)) || is_ref_to_binding) { - snippet.push_str( - &format!( - ".map(|{}| {})", - snippet_with_applicability(cx, pat.span, "..", &mut applicability), - snippet_with_applicability(cx, inner_ret.span, "..", &mut applicability), - )[..], - ); - } - let ty = cx.typeck_results().expr_ty(inner_ret); - if cx.tcx.lang_items().copy_trait().map_or(false, |id| implements_trait(cx, ty, id, &[])) { - snippet.push_str( - &format!( - ".find(|{}{}| {})", - "&".repeat(1 + usize::from(is_ref_to_binding)), - snippet_with_applicability(cx, inner_ret.span, "..", &mut applicability), - snippet_with_applicability(cx, cond.span, "..", &mut applicability), - )[..], - ); - if is_ref_to_binding { - snippet.push_str(".copied()"); - } - } else { - applicability = Applicability::MaybeIncorrect; - snippet.push_str( - &format!( - ".find(|{}| {})", - snippet_with_applicability(cx, inner_ret.span, "..", &mut applicability), - snippet_with_applicability(cx, cond.span, "..", &mut applicability), - )[..], - ); + if let Some(higher::If { + cond, + then, + r#else: None, + }) = higher::If::hir(inner_expr) + && let Some(binding_id) = get_binding(pat) + && let ExprKind::Block(block, _) = then.kind + && let [stmt] = block.stmts + && let StmtKind::Semi(semi) = stmt.kind + && let ExprKind::Ret(Some(ret_value)) = semi.kind + && let ExprKind::Call(ctor, [inner_ret]) = ret_value.kind + && is_res_lang_ctor(cx, path_res(cx, ctor), LangItem::OptionSome) + && path_res(cx, inner_ret) == Res::Local(binding_id) + && let Some((last_stmt, last_ret)) = last_stmt_and_ret(cx, expr) + { + let mut applicability = Applicability::MachineApplicable; + let mut snippet = make_iterator_snippet(cx, arg, &mut applicability); + // Checks if `pat` is a single reference to a binding (`&x`) + let is_ref_to_binding = + matches!(pat.kind, PatKind::Ref(inner, _) if matches!(inner.kind, PatKind::Binding(..))); + // If `pat` is not a binding or a reference to a binding (`x` or `&x`) + // we need to map it to the binding returned by the function (i.e. `.map(|(x, _)| x)`) + if !(matches!(pat.kind, PatKind::Binding(..)) || is_ref_to_binding) { + snippet.push_str( + &format!( + ".map(|{}| {})", + snippet_with_applicability(cx, pat.span, "..", &mut applicability), + snippet_with_applicability(cx, inner_ret.span, "..", &mut applicability), + )[..], + ); + } + let ty = cx.typeck_results().expr_ty(inner_ret); + if cx + .tcx + .lang_items() + .copy_trait() + .map_or(false, |id| implements_trait(cx, ty, id, &[])) + { + snippet.push_str( + &format!( + ".find(|{}{}| {})", + "&".repeat(1 + usize::from(is_ref_to_binding)), + snippet_with_applicability(cx, inner_ret.span, "..", &mut applicability), + snippet_with_applicability(cx, cond.span, "..", &mut applicability), + )[..], + ); + if is_ref_to_binding { + snippet.push_str(".copied()"); } - // Extends to `last_stmt` to include semicolon in case of `return None;` - let lint_span = span.to(last_stmt.span).to(last_ret.span); - span_lint_and_then( - cx, - MANUAL_FIND, - lint_span, - "manual implementation of `Iterator::find`", - |diag| { - if applicability == Applicability::MaybeIncorrect { - diag.note("you may need to dereference some variables"); - } - diag.span_suggestion( - lint_span, - "replace with an iterator", - snippet, - applicability, - ); - }, + } else { + applicability = Applicability::MaybeIncorrect; + snippet.push_str( + &format!( + ".find(|{}| {})", + snippet_with_applicability(cx, inner_ret.span, "..", &mut applicability), + snippet_with_applicability(cx, cond.span, "..", &mut applicability), + )[..], ); } + // Extends to `last_stmt` to include semicolon in case of `return None;` + let lint_span = span.to(last_stmt.span).to(last_ret.span); + span_lint_and_then( + cx, + MANUAL_FIND, + lint_span, + "manual implementation of `Iterator::find`", + |diag| { + if applicability == Applicability::MaybeIncorrect { + diag.note("you may need to dereference some variables"); + } + diag.span_suggestion(lint_span, "replace with an iterator", snippet, applicability); + }, + ); } } @@ -124,34 +125,30 @@ fn last_stmt_and_ret<'tcx>( if let Some(ret) = block.expr { return Some((last_stmt, ret)); } - if_chain! { - if let [.., snd_last, _] = block.stmts; - if let StmtKind::Semi(last_expr) = last_stmt.kind; - if let ExprKind::Ret(Some(ret)) = last_expr.kind; - then { - return Some((snd_last, ret)); - } + if let [.., snd_last, _] = block.stmts + && let StmtKind::Semi(last_expr) = last_stmt.kind + && let ExprKind::Ret(Some(ret)) = last_expr.kind + { + return Some((snd_last, ret)); } } None } let mut parent_iter = cx.tcx.hir().parent_iter(expr.hir_id); - if_chain! { + if let Some((node_hir, Node::Stmt(..))) = parent_iter.next() // This should be the loop - if let Some((node_hir, Node::Stmt(..))) = parent_iter.next(); // This should be the function body - if let Some((_, Node::Block(block))) = parent_iter.next(); - if let Some((last_stmt, last_ret)) = extract(block); - if last_stmt.hir_id == node_hir; - if is_res_lang_ctor(cx, path_res(cx, last_ret), LangItem::OptionNone); - if let Some((_, Node::Expr(_block))) = parent_iter.next(); + && let Some((_, Node::Block(block))) = parent_iter.next() + && let Some((last_stmt, last_ret)) = extract(block) + && last_stmt.hir_id == node_hir + && is_res_lang_ctor(cx, path_res(cx, last_ret), LangItem::OptionNone) + && let Some((_, Node::Expr(_block))) = parent_iter.next() // This includes the function header - if let Some((_, func)) = parent_iter.next(); - if func.fn_kind().is_some(); - then { - Some((block.stmts.last().unwrap(), last_ret)) - } else { - None - } + && let Some((_, func)) = parent_iter.next() + && func.fn_kind().is_some() + { + Some((block.stmts.last().unwrap(), last_ret)) + } else { + None } } diff --git a/src/tools/clippy/clippy_lints/src/loops/manual_flatten.rs b/src/tools/clippy/clippy_lints/src/loops/manual_flatten.rs index 124a35f8f..a726b1169 100644 --- a/src/tools/clippy/clippy_lints/src/loops/manual_flatten.rs +++ b/src/tools/clippy/clippy_lints/src/loops/manual_flatten.rs @@ -3,7 +3,6 @@ use super::MANUAL_FLATTEN; use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::visitors::is_local_used; use clippy_utils::{higher, path_to_local_id, peel_blocks_with_stmt}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::def::{DefKind, Res}; use rustc_hir::{Expr, Pat, PatKind}; @@ -21,66 +20,51 @@ pub(super) fn check<'tcx>( span: Span, ) { let inner_expr = peel_blocks_with_stmt(body); - if_chain! { - if let Some(higher::IfLet { let_pat, let_expr, if_then, if_else: None }) - = higher::IfLet::hir(cx, inner_expr); + if let Some(higher::IfLet { let_pat, let_expr, if_then, if_else: None }) + = higher::IfLet::hir(cx, inner_expr) // Ensure match_expr in `if let` statement is the same as the pat from the for-loop - if let PatKind::Binding(_, pat_hir_id, _, _) = pat.kind; - if path_to_local_id(let_expr, pat_hir_id); + && let PatKind::Binding(_, pat_hir_id, _, _) = pat.kind + && path_to_local_id(let_expr, pat_hir_id) // Ensure the `if let` statement is for the `Some` variant of `Option` or the `Ok` variant of `Result` - if let PatKind::TupleStruct(ref qpath, _, _) = let_pat.kind; - if let Res::Def(DefKind::Ctor(..), ctor_id) = cx.qpath_res(qpath, let_pat.hir_id); - if let Some(variant_id) = cx.tcx.opt_parent(ctor_id); - let some_ctor = cx.tcx.lang_items().option_some_variant() == Some(variant_id); - let ok_ctor = cx.tcx.lang_items().result_ok_variant() == Some(variant_id); - if some_ctor || ok_ctor; + && let PatKind::TupleStruct(ref qpath, _, _) = let_pat.kind + && let Res::Def(DefKind::Ctor(..), ctor_id) = cx.qpath_res(qpath, let_pat.hir_id) + && let Some(variant_id) = cx.tcx.opt_parent(ctor_id) + && let some_ctor = cx.tcx.lang_items().option_some_variant() == Some(variant_id) + && let ok_ctor = cx.tcx.lang_items().result_ok_variant() == Some(variant_id) + && (some_ctor || ok_ctor) // Ensure expr in `if let` is not used afterwards - if !is_local_used(cx, if_then, pat_hir_id); - then { - let if_let_type = if some_ctor { "Some" } else { "Ok" }; - // Prepare the error message - let msg = format!("unnecessary `if let` since only the `{if_let_type}` variant of the iterator element is used"); + && !is_local_used(cx, if_then, pat_hir_id) + { + let if_let_type = if some_ctor { "Some" } else { "Ok" }; + // Prepare the error message + let msg = + format!("unnecessary `if let` since only the `{if_let_type}` variant of the iterator element is used"); - // Prepare the help message - let mut applicability = Applicability::MaybeIncorrect; - let arg_snippet = make_iterator_snippet(cx, arg, &mut applicability); - let copied = match cx.typeck_results().expr_ty(let_expr).kind() { - ty::Ref(_, inner, _) => match inner.kind() { - ty::Ref(..) => ".copied()", - _ => "" - } - _ => "" - }; + // Prepare the help message + let mut applicability = Applicability::MaybeIncorrect; + let arg_snippet = make_iterator_snippet(cx, arg, &mut applicability); + let copied = match cx.typeck_results().expr_ty(let_expr).kind() { + ty::Ref(_, inner, _) => match inner.kind() { + ty::Ref(..) => ".copied()", + _ => "", + }, + _ => "", + }; - let sugg = format!("{arg_snippet}{copied}.flatten()"); + let sugg = format!("{arg_snippet}{copied}.flatten()"); - // If suggestion is not a one-liner, it won't be shown inline within the error message. In that case, - // it will be shown in the extra `help` message at the end, which is why the first `help_msg` needs - // to refer to the correct relative position of the suggestion. - let help_msg = if sugg.contains('\n') { - "remove the `if let` statement in the for loop and then..." - } else { - "...and remove the `if let` statement in the for loop" - }; + // If suggestion is not a one-liner, it won't be shown inline within the error message. In that + // case, it will be shown in the extra `help` message at the end, which is why the first + // `help_msg` needs to refer to the correct relative position of the suggestion. + let help_msg = if sugg.contains('\n') { + "remove the `if let` statement in the for loop and then..." + } else { + "...and remove the `if let` statement in the for loop" + }; - span_lint_and_then( - cx, - MANUAL_FLATTEN, - span, - &msg, - |diag| { - diag.span_suggestion( - arg.span, - "try", - sugg, - applicability, - ); - diag.span_help( - inner_expr.span, - help_msg, - ); - } - ); - } + span_lint_and_then(cx, MANUAL_FLATTEN, span, &msg, |diag| { + diag.span_suggestion(arg.span, "try", sugg, applicability); + diag.span_help(inner_expr.span, help_msg); + }); } } diff --git a/src/tools/clippy/clippy_lints/src/loops/manual_memcpy.rs b/src/tools/clippy/clippy_lints/src/loops/manual_memcpy.rs index d3fd0e863..fda6c9749 100644 --- a/src/tools/clippy/clippy_lints/src/loops/manual_memcpy.rs +++ b/src/tools/clippy/clippy_lints/src/loops/manual_memcpy.rs @@ -4,7 +4,6 @@ use clippy_utils::source::snippet; use clippy_utils::sugg::Sugg; use clippy_utils::ty::is_copy; use clippy_utils::{get_enclosing_block, higher, path_to_local, sugg}; -use if_chain::if_chain; use rustc_ast::ast; use rustc_errors::Applicability; use rustc_hir::intravisit::walk_block; @@ -13,7 +12,6 @@ use rustc_lint::LateContext; use rustc_middle::ty::{self, Ty}; use rustc_span::symbol::sym; use std::fmt::Display; -use std::iter::Iterator; /// Checks for `for` loops that sequentially copy items from one slice-like /// object to another. @@ -59,22 +57,31 @@ pub(super) fn check<'tcx>( .map(|o| { o.and_then(|(lhs, rhs)| { let rhs = fetch_cloned_expr(rhs); - if_chain! { - if let ExprKind::Index(base_left, idx_left, _) = lhs.kind; - if let ExprKind::Index(base_right, idx_right, _) = rhs.kind; - if let Some(ty) = get_slice_like_element_ty(cx, cx.typeck_results().expr_ty(base_left)); - if get_slice_like_element_ty(cx, cx.typeck_results().expr_ty(base_right)).is_some(); - if let Some((start_left, offset_left)) = get_details_from_idx(cx, idx_left, &starts); - if let Some((start_right, offset_right)) = get_details_from_idx(cx, idx_right, &starts); + if let ExprKind::Index(base_left, idx_left, _) = lhs.kind + && let ExprKind::Index(base_right, idx_right, _) = rhs.kind + && let Some(ty) = get_slice_like_element_ty(cx, cx.typeck_results().expr_ty(base_left)) + && get_slice_like_element_ty(cx, cx.typeck_results().expr_ty(base_right)).is_some() + && let Some((start_left, offset_left)) = get_details_from_idx(cx, idx_left, &starts) + && let Some((start_right, offset_right)) = get_details_from_idx(cx, idx_right, &starts) // Source and destination must be different - if path_to_local(base_left) != path_to_local(base_right); - then { - Some((ty, IndexExpr { base: base_left, idx: start_left, idx_offset: offset_left }, - IndexExpr { base: base_right, idx: start_right, idx_offset: offset_right })) - } else { - None - } + && path_to_local(base_left) != path_to_local(base_right) + { + Some(( + ty, + IndexExpr { + base: base_left, + idx: start_left, + idx_offset: offset_left, + }, + IndexExpr { + base: base_right, + idx: start_right, + idx_offset: offset_right, + }, + )) + } else { + None } }) }) @@ -118,23 +125,19 @@ fn build_manual_memcpy_suggestion<'tcx>( } let print_limit = |end: &Expr<'_>, end_str: &str, base: &Expr<'_>, sugg: MinifyingSugg<'static>| { - if_chain! { - if let ExprKind::MethodCall(method, recv, [], _) = end.kind; - if method.ident.name == sym::len; - if path_to_local(recv) == path_to_local(base); - then { - if sugg.to_string() == end_str { - sugg::EMPTY.into() - } else { - sugg - } + if let ExprKind::MethodCall(method, recv, [], _) = end.kind + && method.ident.name == sym::len + && path_to_local(recv) == path_to_local(base) + { + if sugg.to_string() == end_str { + sugg::EMPTY.into() } else { - match limits { - ast::RangeLimits::Closed => { - sugg + &sugg::ONE.into() - }, - ast::RangeLimits::HalfOpen => sugg, - } + sugg + } + } else { + match limits { + ast::RangeLimits::Closed => sugg + &sugg::ONE.into(), + ast::RangeLimits::HalfOpen => sugg, } } }; @@ -174,7 +177,9 @@ fn build_manual_memcpy_suggestion<'tcx>( let dst_base_str = snippet(cx, dst.base.span, "???"); let src_base_str = snippet(cx, src.base.span, "???"); - let dst = if dst_offset == sugg::EMPTY && dst_limit == sugg::EMPTY { + let dst = if (dst_offset == sugg::EMPTY && dst_limit == sugg::EMPTY) + || is_array_length_equal_to_range(cx, start, end, dst.base) + { dst_base_str } else { format!("{dst_base_str}[{}..{}]", dst_offset.maybe_par(), dst_limit.maybe_par()).into() @@ -186,11 +191,13 @@ fn build_manual_memcpy_suggestion<'tcx>( "clone_from_slice" }; - format!( - "{dst}.{method_str}(&{src_base_str}[{}..{}]);", - src_offset.maybe_par(), - src_limit.maybe_par() - ) + let src = if is_array_length_equal_to_range(cx, start, end, src.base) { + src_base_str + } else { + format!("{src_base_str}[{}..{}]", src_offset.maybe_par(), src_limit.maybe_par()).into() + }; + + format!("{dst}.{method_str}(&{src});") } /// a wrapper of `Sugg`. Besides what `Sugg` do, this removes unnecessary `0`; @@ -331,10 +338,12 @@ fn get_slice_like_element_ty<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>) -> Opti } fn fetch_cloned_expr<'tcx>(expr: &'tcx Expr<'tcx>) -> &'tcx Expr<'tcx> { - if_chain! { - if let ExprKind::MethodCall(method, arg, [], _) = expr.kind; - if method.ident.name == sym::clone; - then { arg } else { expr } + if let ExprKind::MethodCall(method, arg, [], _) = expr.kind + && method.ident.name == sym::clone + { + arg + } else { + expr } } @@ -446,3 +455,34 @@ fn get_loop_counters<'a, 'tcx>( .into() }) } + +fn is_array_length_equal_to_range(cx: &LateContext<'_>, start: &Expr<'_>, end: &Expr<'_>, arr: &Expr<'_>) -> bool { + fn extract_lit_value(expr: &Expr<'_>) -> Option<u128> { + if let ExprKind::Lit(lit) = expr.kind + && let ast::LitKind::Int(value, _) = lit.node + { + Some(value) + } else { + None + } + } + + let arr_ty = cx.typeck_results().expr_ty(arr).peel_refs(); + + if let ty::Array(_, s) = arr_ty.kind() { + let size: u128 = if let Some(size) = s.try_eval_target_usize(cx.tcx, cx.param_env) { + size.into() + } else { + return false; + }; + + let range = match (extract_lit_value(start), extract_lit_value(end)) { + (Some(start_value), Some(end_value)) => end_value - start_value, + _ => return false, + }; + + size == range + } else { + false + } +} diff --git a/src/tools/clippy/clippy_lints/src/loops/missing_spin_loop.rs b/src/tools/clippy/clippy_lints/src/loops/missing_spin_loop.rs index 7b7d19c75..e405829b2 100644 --- a/src/tools/clippy/clippy_lints/src/loops/missing_spin_loop.rs +++ b/src/tools/clippy/clippy_lints/src/loops/missing_spin_loop.rs @@ -31,26 +31,30 @@ fn unpack_cond<'tcx>(cond: &'tcx Expr<'tcx>) -> &'tcx Expr<'tcx> { } pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, cond: &'tcx Expr<'_>, body: &'tcx Expr<'_>) { - if_chain! { - if let ExprKind::Block(Block { stmts: [], expr: None, ..}, _) = body.kind; - if let ExprKind::MethodCall(method, callee, ..) = unpack_cond(cond).kind; - if [sym::load, sym::compare_exchange, sym::compare_exchange_weak].contains(&method.ident.name); - if let ty::Adt(def, _args) = cx.typeck_results().expr_ty(callee).kind(); - if cx.tcx.is_diagnostic_item(sym::AtomicBool, def.did()); - then { - span_lint_and_sugg( - cx, - MISSING_SPIN_LOOP, - body.span, - "busy-waiting loop should at least have a spin loop hint", - "try", - (if is_no_std_crate(cx) { - "{ core::hint::spin_loop() }" - } else { - "{ std::hint::spin_loop() }" - }).into(), - Applicability::MachineApplicable - ); - } + if let ExprKind::Block( + Block { + stmts: [], expr: None, .. + }, + _, + ) = body.kind + && let ExprKind::MethodCall(method, callee, ..) = unpack_cond(cond).kind + && [sym::load, sym::compare_exchange, sym::compare_exchange_weak].contains(&method.ident.name) + && let ty::Adt(def, _args) = cx.typeck_results().expr_ty(callee).kind() + && cx.tcx.is_diagnostic_item(sym::AtomicBool, def.did()) + { + span_lint_and_sugg( + cx, + MISSING_SPIN_LOOP, + body.span, + "busy-waiting loop should at least have a spin loop hint", + "try", + (if is_no_std_crate(cx) { + "{ core::hint::spin_loop() }" + } else { + "{ std::hint::spin_loop() }" + }) + .into(), + Applicability::MachineApplicable, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/loops/mod.rs b/src/tools/clippy/clippy_lints/src/loops/mod.rs index 67c80fb83..3c9bde86b 100644 --- a/src/tools/clippy/clippy_lints/src/loops/mod.rs +++ b/src/tools/clippy/clippy_lints/src/loops/mod.rs @@ -3,6 +3,7 @@ mod explicit_counter_loop; mod explicit_into_iter_loop; mod explicit_iter_loop; mod for_kv_map; +mod infinite_loop; mod iter_next_loop; mod manual_find; mod manual_flatten; @@ -24,7 +25,7 @@ use clippy_config::msrvs::Msrv; use clippy_utils::higher; use rustc_hir::{Expr, ExprKind, LoopSource, Pat}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::Span; use utils::{make_iterator_snippet, IncrementVisitor, InitializeVisitor}; @@ -635,6 +636,48 @@ declare_clippy_lint! { "checking for emptiness of a `Vec` in the loop condition and popping an element in the body" } +declare_clippy_lint! { + /// ### What it does + /// Checks for infinite loops in a function where the return type is not `!` + /// and lint accordingly. + /// + /// ### Why is this bad? + /// A loop should be gently exited somewhere, or at least mark its parent function as + /// never return (`!`). + /// + /// ### Example + /// ```no_run,ignore + /// fn run_forever() { + /// loop { + /// // do something + /// } + /// } + /// ``` + /// If infinite loops are as intended: + /// ```no_run,ignore + /// fn run_forever() -> ! { + /// loop { + /// // do something + /// } + /// } + /// ``` + /// Otherwise add a `break` or `return` condition: + /// ```no_run,ignore + /// fn run_forever() { + /// loop { + /// // do something + /// if condition { + /// break; + /// } + /// } + /// } + /// ``` + #[clippy::version = "1.75.0"] + pub INFINITE_LOOP, + restriction, + "possibly unintended infinite loop" +} + pub struct Loops { msrv: Msrv, enforce_iter_loop_reborrow: bool, @@ -669,6 +712,7 @@ impl_lint_pass!(Loops => [ MANUAL_FIND, MANUAL_WHILE_LET_SOME, UNUSED_ENUMERATE_INDEX, + INFINITE_LOOP, ]); impl<'tcx> LateLintPass<'tcx> for Loops { @@ -707,10 +751,11 @@ impl<'tcx> LateLintPass<'tcx> for Loops { // check for `loop { if let {} else break }` that could be `while let` // (also matches an explicit "match" instead of "if let") // (even if the "match" or "if let" is used for declaration) - if let ExprKind::Loop(block, _, LoopSource::Loop, _) = expr.kind { + if let ExprKind::Loop(block, label, LoopSource::Loop, _) = expr.kind { // also check for empty `loop {}` statements, skipping those in #[panic_handler] empty_loop::check(cx, expr, block); while_let_loop::check(cx, expr, block); + infinite_loop::check(cx, expr, block, label); } while_let_on_iterator::check(cx, expr); diff --git a/src/tools/clippy/clippy_lints/src/loops/mut_range_bound.rs b/src/tools/clippy/clippy_lints/src/loops/mut_range_bound.rs index 2c12d9582..c4e60e98a 100644 --- a/src/tools/clippy/clippy_lints/src/loops/mut_range_bound.rs +++ b/src/tools/clippy/clippy_lints/src/loops/mut_range_bound.rs @@ -1,7 +1,6 @@ use super::MUT_RANGE_BOUND; use clippy_utils::diagnostics::span_lint_and_note; use clippy_utils::{get_enclosing_block, higher, path_to_local}; -use if_chain::if_chain; use rustc_hir::intravisit::{self, Visitor}; use rustc_hir::{BindingAnnotation, Expr, ExprKind, HirId, Node, PatKind}; use rustc_hir_typeck::expr_use_visitor::{Delegate, ExprUseVisitor, PlaceBase, PlaceWithHirId}; @@ -12,19 +11,17 @@ use rustc_middle::ty; use rustc_span::Span; pub(super) fn check(cx: &LateContext<'_>, arg: &Expr<'_>, body: &Expr<'_>) { - if_chain! { - if let Some(higher::Range { - start: Some(start), - end: Some(end), - .. - }) = higher::Range::hir(arg); - let (mut_id_start, mut_id_end) = (check_for_mutability(cx, start), check_for_mutability(cx, end)); - if mut_id_start.is_some() || mut_id_end.is_some(); - then { - let (span_low, span_high) = check_for_mutation(cx, body, mut_id_start, mut_id_end); - mut_warn_with_span(cx, span_low); - mut_warn_with_span(cx, span_high); - } + if let Some(higher::Range { + start: Some(start), + end: Some(end), + .. + }) = higher::Range::hir(arg) + && let (mut_id_start, mut_id_end) = (check_for_mutability(cx, start), check_for_mutability(cx, end)) + && (mut_id_start.is_some() || mut_id_end.is_some()) + { + let (span_low, span_high) = check_for_mutation(cx, body, mut_id_start, mut_id_end); + mut_warn_with_span(cx, span_low); + mut_warn_with_span(cx, span_high); } } @@ -42,13 +39,11 @@ fn mut_warn_with_span(cx: &LateContext<'_>, span: Option<Span>) { } fn check_for_mutability(cx: &LateContext<'_>, bound: &Expr<'_>) -> Option<HirId> { - if_chain! { - if let Some(hir_id) = path_to_local(bound); - if let Node::Pat(pat) = cx.tcx.hir().get(hir_id); - if let PatKind::Binding(BindingAnnotation::MUT, ..) = pat.kind; - then { - return Some(hir_id); - } + if let Some(hir_id) = path_to_local(bound) + && let Node::Pat(pat) = cx.tcx.hir_node(hir_id) + && let PatKind::Binding(BindingAnnotation::MUT, ..) = pat.kind + { + return Some(hir_id); } None } diff --git a/src/tools/clippy/clippy_lints/src/loops/needless_range_loop.rs b/src/tools/clippy/clippy_lints/src/loops/needless_range_loop.rs index c4af46b8f..4acf46f73 100644 --- a/src/tools/clippy/clippy_lints/src/loops/needless_range_loop.rs +++ b/src/tools/clippy/clippy_lints/src/loops/needless_range_loop.rs @@ -4,7 +4,6 @@ use clippy_utils::source::snippet; use clippy_utils::ty::has_iter_method; use clippy_utils::visitors::is_local_used; use clippy_utils::{contains_name, higher, is_integer_const, sugg, SpanlessEq}; -use if_chain::if_chain; use rustc_ast::ast; use rustc_data_structures::fx::{FxHashMap, FxHashSet}; use rustc_hir::def::{DefKind, Res}; @@ -14,8 +13,7 @@ use rustc_lint::LateContext; use rustc_middle::middle::region; use rustc_middle::ty::{self, Ty}; use rustc_span::symbol::{sym, Symbol}; -use std::iter::{self, Iterator}; -use std::mem; +use std::{iter, mem}; /// Checks for looping over a range and then indexing a sequence with it. /// The iteratee must be a range literal. @@ -187,15 +185,13 @@ pub(super) fn check<'tcx>( } fn is_len_call(expr: &Expr<'_>, var: Symbol) -> bool { - if_chain! { - if let ExprKind::MethodCall(method, recv, [], _) = expr.kind; - if method.ident.name == sym::len; - if let ExprKind::Path(QPath::Resolved(_, path)) = recv.kind; - if path.segments.len() == 1; - if path.segments[0].ident.name == var; - then { - return true; - } + if let ExprKind::MethodCall(method, recv, [], _) = expr.kind + && method.ident.name == sym::len + && let ExprKind::Path(QPath::Resolved(_, path)) = recv.kind + && path.segments.len() == 1 + && path.segments[0].ident.name == var + { + return true; } false @@ -207,17 +203,15 @@ fn is_end_eq_array_len<'tcx>( limits: ast::RangeLimits, indexed_ty: Ty<'tcx>, ) -> bool { - if_chain! { - if let ExprKind::Lit(lit) = end.kind; - if let ast::LitKind::Int(end_int, _) = lit.node; - if let ty::Array(_, arr_len_const) = indexed_ty.kind(); - if let Some(arr_len) = arr_len_const.try_eval_target_usize(cx.tcx, cx.param_env); - then { - return match limits { - ast::RangeLimits::Closed => end_int + 1 >= arr_len.into(), - ast::RangeLimits::HalfOpen => end_int >= arr_len.into(), - }; - } + if let ExprKind::Lit(lit) = end.kind + && let ast::LitKind::Int(end_int, _) = lit.node + && let ty::Array(_, arr_len_const) = indexed_ty.kind() + && let Some(arr_len) = arr_len_const.try_eval_target_usize(cx.tcx, cx.param_env) + { + return match limits { + ast::RangeLimits::Closed => end_int + 1 >= arr_len.into(), + ast::RangeLimits::HalfOpen => end_int >= arr_len.into(), + }; } false @@ -248,51 +242,49 @@ struct VarVisitor<'a, 'tcx> { impl<'a, 'tcx> VarVisitor<'a, 'tcx> { fn check(&mut self, idx: &'tcx Expr<'_>, seqexpr: &'tcx Expr<'_>, expr: &'tcx Expr<'_>) -> bool { - if_chain! { + if let ExprKind::Path(ref seqpath) = seqexpr.kind // the indexed container is referenced by a name - if let ExprKind::Path(ref seqpath) = seqexpr.kind; - if let QPath::Resolved(None, seqvar) = *seqpath; - if seqvar.segments.len() == 1; - if is_local_used(self.cx, idx, self.var); - then { - if self.prefer_mutable { - self.indexed_mut.insert(seqvar.segments[0].ident.name); - } - let index_used_directly = matches!(idx.kind, ExprKind::Path(_)); - let res = self.cx.qpath_res(seqpath, seqexpr.hir_id); - match res { - Res::Local(hir_id) => { - let parent_def_id = self.cx.tcx.hir().get_parent_item(expr.hir_id); - let extent = self - .cx - .tcx - .region_scope_tree(parent_def_id) - .var_scope(hir_id.local_id) - .unwrap(); - if index_used_directly { - self.indexed_directly.insert( - seqvar.segments[0].ident.name, - (Some(extent), self.cx.typeck_results().node_type(seqexpr.hir_id)), - ); - } else { - self.indexed_indirectly - .insert(seqvar.segments[0].ident.name, Some(extent)); - } - return false; // no need to walk further *on the variable* - }, - Res::Def(DefKind::Static(_) | DefKind::Const, ..) => { - if index_used_directly { - self.indexed_directly.insert( - seqvar.segments[0].ident.name, - (None, self.cx.typeck_results().node_type(seqexpr.hir_id)), - ); - } else { - self.indexed_indirectly.insert(seqvar.segments[0].ident.name, None); - } - return false; // no need to walk further *on the variable* - }, - _ => (), - } + && let QPath::Resolved(None, seqvar) = *seqpath + && seqvar.segments.len() == 1 + && is_local_used(self.cx, idx, self.var) + { + if self.prefer_mutable { + self.indexed_mut.insert(seqvar.segments[0].ident.name); + } + let index_used_directly = matches!(idx.kind, ExprKind::Path(_)); + let res = self.cx.qpath_res(seqpath, seqexpr.hir_id); + match res { + Res::Local(hir_id) => { + let parent_def_id = self.cx.tcx.hir().get_parent_item(expr.hir_id); + let extent = self + .cx + .tcx + .region_scope_tree(parent_def_id) + .var_scope(hir_id.local_id) + .unwrap(); + if index_used_directly { + self.indexed_directly.insert( + seqvar.segments[0].ident.name, + (Some(extent), self.cx.typeck_results().node_type(seqexpr.hir_id)), + ); + } else { + self.indexed_indirectly + .insert(seqvar.segments[0].ident.name, Some(extent)); + } + return false; // no need to walk further *on the variable* + }, + Res::Def(DefKind::Static(_) | DefKind::Const, ..) => { + if index_used_directly { + self.indexed_directly.insert( + seqvar.segments[0].ident.name, + (None, self.cx.typeck_results().node_type(seqexpr.hir_id)), + ); + } else { + self.indexed_indirectly.insert(seqvar.segments[0].ident.name, None); + } + return false; // no need to walk further *on the variable* + }, + _ => (), } } true @@ -301,42 +293,36 @@ impl<'a, 'tcx> VarVisitor<'a, 'tcx> { impl<'a, 'tcx> Visitor<'tcx> for VarVisitor<'a, 'tcx> { fn visit_expr(&mut self, expr: &'tcx Expr<'_>) { - if_chain! { + if let ExprKind::MethodCall(meth, args_0, [args_1, ..], _) = &expr.kind // a range index op - if let ExprKind::MethodCall(meth, args_0, [args_1, ..], _) = &expr.kind; - if let Some(trait_id) = self + && let Some(trait_id) = self .cx .typeck_results() .type_dependent_def_id(expr.hir_id) - .and_then(|def_id| self.cx.tcx.trait_of_item(def_id)); - if (meth.ident.name == sym::index && self.cx.tcx.lang_items().index_trait() == Some(trait_id)) - || (meth.ident.name == sym::index_mut && self.cx.tcx.lang_items().index_mut_trait() == Some(trait_id)); - if !self.check(args_1, args_0, expr); - then { - return; - } + .and_then(|def_id| self.cx.tcx.trait_of_item(def_id)) + && ((meth.ident.name == sym::index && self.cx.tcx.lang_items().index_trait() == Some(trait_id)) + || (meth.ident.name == sym::index_mut && self.cx.tcx.lang_items().index_mut_trait() == Some(trait_id))) + && !self.check(args_1, args_0, expr) + { + return; } - if_chain! { + if let ExprKind::Index(seqexpr, idx, _) = expr.kind // an index op - if let ExprKind::Index(seqexpr, idx, _) = expr.kind; - if !self.check(idx, seqexpr, expr); - then { - return; - } + && !self.check(idx, seqexpr, expr) + { + return; } - if_chain! { + if let ExprKind::Path(QPath::Resolved(None, path)) = expr.kind // directly using a variable - if let ExprKind::Path(QPath::Resolved(None, path)) = expr.kind; - if let Res::Local(local_id) = path.res; - then { - if local_id == self.var { - self.nonindex = true; - } else { - // not the correct variable, but still a variable - self.referenced.insert(path.segments[0].ident.name); - } + && let Res::Local(local_id) = path.res + { + if local_id == self.var { + self.nonindex = true; + } else { + // not the correct variable, but still a variable + self.referenced.insert(path.segments[0].ident.name); } } diff --git a/src/tools/clippy/clippy_lints/src/loops/never_loop.rs b/src/tools/clippy/clippy_lints/src/loops/never_loop.rs index cc054cb46..62bc66319 100644 --- a/src/tools/clippy/clippy_lints/src/loops/never_loop.rs +++ b/src/tools/clippy/clippy_lints/src/loops/never_loop.rs @@ -8,7 +8,7 @@ use rustc_errors::Applicability; use rustc_hir::{Block, Destination, Expr, ExprKind, HirId, InlineAsmOperand, Pat, Stmt, StmtKind}; use rustc_lint::LateContext; use rustc_span::{sym, Span}; -use std::iter::{once, Iterator}; +use std::iter::once; pub(super) fn check<'tcx>( cx: &LateContext<'tcx>, diff --git a/src/tools/clippy/clippy_lints/src/loops/same_item_push.rs b/src/tools/clippy/clippy_lints/src/loops/same_item_push.rs index 5fffb27cd..c245eaf1a 100644 --- a/src/tools/clippy/clippy_lints/src/loops/same_item_push.rs +++ b/src/tools/clippy/clippy_lints/src/loops/same_item_push.rs @@ -3,7 +3,6 @@ use clippy_utils::diagnostics::span_lint_and_help; use clippy_utils::path_to_local; use clippy_utils::source::snippet_with_context; use clippy_utils::ty::{implements_trait, is_type_diagnostic_item}; -use if_chain::if_chain; use rustc_data_structures::fx::FxHashSet; use rustc_errors::Applicability; use rustc_hir::def::{DefKind, Res}; @@ -12,7 +11,6 @@ use rustc_hir::{BindingAnnotation, Block, Expr, ExprKind, HirId, Mutability, Nod use rustc_lint::LateContext; use rustc_span::symbol::sym; use rustc_span::SyntaxContext; -use std::iter::Iterator; /// Detects for loop pushing the same item into a Vec pub(super) fn check<'tcx>( @@ -44,54 +42,50 @@ pub(super) fn check<'tcx>( // Determine whether it is safe to lint the body let mut same_item_push_visitor = SameItemPushVisitor::new(cx); walk_expr(&mut same_item_push_visitor, body); - if_chain! { - if same_item_push_visitor.should_lint(); - if let Some((vec, pushed_item, ctxt)) = same_item_push_visitor.vec_push; - let vec_ty = cx.typeck_results().expr_ty(vec); - let ty = vec_ty.walk().nth(1).unwrap().expect_ty(); - if cx + if same_item_push_visitor.should_lint() + && let Some((vec, pushed_item, ctxt)) = same_item_push_visitor.vec_push + && let vec_ty = cx.typeck_results().expr_ty(vec) + && let ty = vec_ty.walk().nth(1).unwrap().expect_ty() + && cx .tcx .lang_items() .clone_trait() - .map_or(false, |id| implements_trait(cx, ty, id, &[])); - then { - // Make sure that the push does not involve possibly mutating values - match pushed_item.kind { - ExprKind::Path(ref qpath) => { - match cx.qpath_res(qpath, pushed_item.hir_id) { - // immutable bindings that are initialized with literal or constant - Res::Local(hir_id) => { - let node = cx.tcx.hir().get(hir_id); - if_chain! { - if let Node::Pat(pat) = node; - if let PatKind::Binding(bind_ann, ..) = pat.kind; - if !matches!(bind_ann, BindingAnnotation(_, Mutability::Mut)); - let parent_node = cx.tcx.hir().parent_id(hir_id); - if let Some(Node::Local(parent_let_expr)) = cx.tcx.hir().find(parent_node); - if let Some(init) = parent_let_expr.init; - then { - match init.kind { - // immutable bindings that are initialized with literal - ExprKind::Lit(..) => emit_lint(cx, vec, pushed_item, ctxt), - // immutable bindings that are initialized with constant - ExprKind::Path(ref path) => { - if let Res::Def(DefKind::Const, ..) = cx.qpath_res(path, init.hir_id) { - emit_lint(cx, vec, pushed_item, ctxt); - } - } - _ => {}, + .map_or(false, |id| implements_trait(cx, ty, id, &[])) + { + // Make sure that the push does not involve possibly mutating values + match pushed_item.kind { + ExprKind::Path(ref qpath) => { + match cx.qpath_res(qpath, pushed_item.hir_id) { + // immutable bindings that are initialized with literal or constant + Res::Local(hir_id) => { + let node = cx.tcx.hir_node(hir_id); + if let Node::Pat(pat) = node + && let PatKind::Binding(bind_ann, ..) = pat.kind + && !matches!(bind_ann, BindingAnnotation(_, Mutability::Mut)) + && let parent_node = cx.tcx.hir().parent_id(hir_id) + && let Some(Node::Local(parent_let_expr)) = cx.tcx.opt_hir_node(parent_node) + && let Some(init) = parent_let_expr.init + { + match init.kind { + // immutable bindings that are initialized with literal + ExprKind::Lit(..) => emit_lint(cx, vec, pushed_item, ctxt), + // immutable bindings that are initialized with constant + ExprKind::Path(ref path) => { + if let Res::Def(DefKind::Const, ..) = cx.qpath_res(path, init.hir_id) { + emit_lint(cx, vec, pushed_item, ctxt); } - } + }, + _ => {}, } - }, - // constant - Res::Def(DefKind::Const, ..) => emit_lint(cx, vec, pushed_item, ctxt), - _ => {}, - } - }, - ExprKind::Lit(..) => emit_lint(cx, vec, pushed_item, ctxt), - _ => {}, - } + } + }, + // constant + Res::Def(DefKind::Const, ..) => emit_lint(cx, vec, pushed_item, ctxt), + _ => {}, + } + }, + ExprKind::Lit(..) => emit_lint(cx, vec, pushed_item, ctxt), + _ => {}, } } } @@ -118,16 +112,14 @@ impl<'a, 'tcx> SameItemPushVisitor<'a, 'tcx> { } fn should_lint(&self) -> bool { - if_chain! { - if !self.non_deterministic_expr; - if !self.multiple_pushes; - if let Some((vec, _, _)) = self.vec_push; - if let Some(hir_id) = path_to_local(vec); - then { - !self.used_locals.contains(&hir_id) - } else { - false - } + if !self.non_deterministic_expr + && !self.multiple_pushes + && let Some((vec, _, _)) = self.vec_push + && let Some(hir_id) = path_to_local(vec) + { + !self.used_locals.contains(&hir_id) + } else { + false } } } @@ -180,18 +172,16 @@ fn get_vec_push<'tcx>( cx: &LateContext<'tcx>, stmt: &'tcx Stmt<'_>, ) -> Option<(&'tcx Expr<'tcx>, &'tcx Expr<'tcx>, SyntaxContext)> { - if_chain! { + if let StmtKind::Semi(semi_stmt) = &stmt.kind // Extract method being called - if let StmtKind::Semi(semi_stmt) = &stmt.kind; - if let ExprKind::MethodCall(path, self_expr, args, _) = &semi_stmt.kind; + && let ExprKind::MethodCall(path, self_expr, args, _) = &semi_stmt.kind // Figure out the parameters for the method call - if let Some(pushed_item) = args.first(); + && let Some(pushed_item) = args.first() // Check that the method being called is push() on a Vec - if is_type_diagnostic_item(cx, cx.typeck_results().expr_ty(self_expr), sym::Vec); - if path.ident.name.as_str() == "push"; - then { - return Some((self_expr, pushed_item, semi_stmt.span.ctxt())) - } + && is_type_diagnostic_item(cx, cx.typeck_results().expr_ty(self_expr), sym::Vec) + && path.ident.name.as_str() == "push" + { + return Some((self_expr, pushed_item, semi_stmt.span.ctxt())); } None } diff --git a/src/tools/clippy/clippy_lints/src/loops/single_element_loop.rs b/src/tools/clippy/clippy_lints/src/loops/single_element_loop.rs index dfb800ccf..4773a1454 100644 --- a/src/tools/clippy/clippy_lints/src/loops/single_element_loop.rs +++ b/src/tools/clippy/clippy_lints/src/loops/single_element_loop.rs @@ -1,8 +1,7 @@ use super::SINGLE_ELEMENT_LOOP; use clippy_utils::diagnostics::span_lint_and_sugg; -use clippy_utils::source::{indent_of, snippet_with_applicability}; +use clippy_utils::source::{indent_of, snippet, snippet_with_applicability}; use clippy_utils::visitors::contains_break_or_continue; -use if_chain::if_chain; use rustc_ast::util::parser::PREC_PREFIX; use rustc_ast::Mutability; use rustc_errors::Applicability; @@ -66,27 +65,42 @@ pub(super) fn check<'tcx>( ExprKind::Array([arg]) if cx.tcx.sess.edition() >= Edition::Edition2021 => (arg, ""), _ => return, }; - if_chain! { - if let ExprKind::Block(block, _) = body.kind; - if !block.stmts.is_empty(); - if !contains_break_or_continue(body); - then { - let mut applicability = Applicability::MachineApplicable; - let pat_snip = snippet_with_applicability(cx, pat.span, "..", &mut applicability); - let mut arg_snip = snippet_with_applicability(cx, arg_expression.span, "..", &mut applicability); - let mut block_str = snippet_with_applicability(cx, block.span, "..", &mut applicability).into_owned(); - block_str.remove(0); - block_str.pop(); - let indent = " ".repeat(indent_of(cx, block.stmts[0].span).unwrap_or(0)); + if let ExprKind::Block(block, _) = body.kind + && !block.stmts.is_empty() + && !contains_break_or_continue(body) + { + let mut applicability = Applicability::MachineApplicable; + let pat_snip = snippet_with_applicability(cx, pat.span, "..", &mut applicability); + let mut arg_snip = snippet_with_applicability(cx, arg_expression.span, "..", &mut applicability); + let mut block_str = snippet_with_applicability(cx, block.span, "..", &mut applicability).into_owned(); + block_str.remove(0); + block_str.pop(); + let indent = " ".repeat(indent_of(cx, block.stmts[0].span).unwrap_or(0)); - // Reference iterator from `&(mut) []` or `[].iter(_mut)()`. - if !prefix.is_empty() && ( + // Reference iterator from `&(mut) []` or `[].iter(_mut)()`. + if !prefix.is_empty() + && ( // Precedence of internal expression is less than or equal to precedence of `&expr`. arg_expression.precedence().order() <= PREC_PREFIX || is_range_literal(arg_expression) - ) { - arg_snip = format!("({arg_snip})").into(); - } + ) + { + arg_snip = format!("({arg_snip})").into(); + } + if clippy_utils::higher::Range::hir(arg_expression).is_some() { + let range_expr = snippet(cx, arg_expression.span, "?").to_string(); + + let sugg = snippet(cx, arg_expression.span, ".."); + span_lint_and_sugg( + cx, + SINGLE_ELEMENT_LOOP, + arg.span, + format!("this loops only once with `{pat_snip}` being `{range_expr}`").as_str(), + "did you mean to iterate over the range instead?", + sugg.to_string(), + Applicability::Unspecified, + ); + } else { span_lint_and_sugg( cx, SINGLE_ELEMENT_LOOP, @@ -95,7 +109,7 @@ pub(super) fn check<'tcx>( "try", format!("{{\n{indent}let {pat_snip} = {prefix}{arg_snip};{block_str}}}"), applicability, - ) + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/loops/utils.rs b/src/tools/clippy/clippy_lints/src/loops/utils.rs index 0a2bd89eb..e685274ad 100644 --- a/src/tools/clippy/clippy_lints/src/loops/utils.rs +++ b/src/tools/clippy/clippy_lints/src/loops/utils.rs @@ -1,6 +1,5 @@ use clippy_utils::ty::{has_iter_method, implements_trait}; use clippy_utils::{get_parent_expr, is_integer_const, path_to_local, path_to_local_id, sugg}; -use if_chain::if_chain; use rustc_ast::ast::{LitIntType, LitKind}; use rustc_errors::Applicability; use rustc_hir::intravisit::{walk_expr, walk_local, walk_pat, walk_stmt, Visitor}; @@ -10,7 +9,6 @@ use rustc_middle::hir::nested_filter; use rustc_middle::ty::{self, Ty}; use rustc_span::source_map::Spanned; use rustc_span::symbol::{sym, Symbol}; -use std::iter::Iterator; #[derive(Debug, PartialEq, Eq)] enum IncrementVisitorVarState { @@ -145,20 +143,18 @@ impl<'a, 'tcx> Visitor<'tcx> for InitializeVisitor<'a, 'tcx> { fn visit_local(&mut self, l: &'tcx Local<'_>) { // Look for declarations of the variable - if_chain! { - if l.pat.hir_id == self.var_id; - if let PatKind::Binding(.., ident, _) = l.pat.kind; - then { - let ty = l.ty.map(|_| self.cx.typeck_results().pat_ty(l.pat)); + if l.pat.hir_id == self.var_id + && let PatKind::Binding(.., ident, _) = l.pat.kind + { + let ty = l.ty.map(|_| self.cx.typeck_results().pat_ty(l.pat)); - self.state = l.init.map_or(InitializeVisitorState::Declared(ident.name, ty), |init| { - InitializeVisitorState::Initialized { - initializer: init, - ty, - name: ident.name, - } - }) - } + self.state = l.init.map_or(InitializeVisitorState::Declared(ident.name, ty), |init| { + InitializeVisitorState::Initialized { + initializer: init, + ty, + name: ident.name, + } + }); } walk_local(self, l); diff --git a/src/tools/clippy/clippy_lints/src/loops/while_immutable_condition.rs b/src/tools/clippy/clippy_lints/src/loops/while_immutable_condition.rs index 7f24f3c5d..9fd9b7a16 100644 --- a/src/tools/clippy/clippy_lints/src/loops/while_immutable_condition.rs +++ b/src/tools/clippy/clippy_lints/src/loops/while_immutable_condition.rs @@ -2,7 +2,6 @@ use super::WHILE_IMMUTABLE_CONDITION; use clippy_utils::consts::constant; use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::usage::mutated_variables; -use if_chain::if_chain; use rustc_hir::def::{DefKind, Res}; use rustc_hir::def_id::DefIdMap; use rustc_hir::intravisit::{walk_expr, Visitor}; @@ -95,20 +94,18 @@ struct VarCollectorVisitor<'a, 'tcx> { impl<'a, 'tcx> VarCollectorVisitor<'a, 'tcx> { fn insert_def_id(&mut self, ex: &'tcx Expr<'_>) { - if_chain! { - if let ExprKind::Path(ref qpath) = ex.kind; - if let QPath::Resolved(None, _) = *qpath; - then { - match self.cx.qpath_res(qpath, ex.hir_id) { - Res::Local(hir_id) => { - self.ids.insert(hir_id); - }, - Res::Def(DefKind::Static(_), def_id) => { - let mutable = self.cx.tcx.is_mutable_static(def_id); - self.def_ids.insert(def_id, mutable); - }, - _ => {}, - } + if let ExprKind::Path(ref qpath) = ex.kind + && let QPath::Resolved(None, _) = *qpath + { + match self.cx.qpath_res(qpath, ex.hir_id) { + Res::Local(hir_id) => { + self.ids.insert(hir_id); + }, + Res::Def(DefKind::Static(_), def_id) => { + let mutable = self.cx.tcx.is_mutable_static(def_id); + self.def_ids.insert(def_id, mutable); + }, + _ => {}, } } } diff --git a/src/tools/clippy/clippy_lints/src/loops/while_let_on_iterator.rs b/src/tools/clippy/clippy_lints/src/loops/while_let_on_iterator.rs index 5153070cf..21b9efba5 100644 --- a/src/tools/clippy/clippy_lints/src/loops/while_let_on_iterator.rs +++ b/src/tools/clippy/clippy_lints/src/loops/while_let_on_iterator.rs @@ -3,7 +3,6 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet_with_applicability; use clippy_utils::visitors::is_res_used; use clippy_utils::{get_enclosing_loop_or_multi_call_closure, higher, is_refutable, is_res_lang_ctor, is_trait_method}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::def::Res; use rustc_hir::intravisit::{walk_expr, Visitor}; @@ -15,59 +14,53 @@ use rustc_span::symbol::sym; use rustc_span::Symbol; pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) { - let (scrutinee_expr, iter_expr_struct, iter_expr, some_pat, loop_expr) = if_chain! { - if let Some(higher::WhileLet { if_then, let_pat, let_expr }) = higher::WhileLet::hir(expr); + if let Some(higher::WhileLet { if_then, let_pat, let_expr }) = higher::WhileLet::hir(expr) // check for `Some(..)` pattern - if let PatKind::TupleStruct(ref pat_path, some_pat, _) = let_pat.kind; - if is_res_lang_ctor(cx, cx.qpath_res(pat_path, let_pat.hir_id), LangItem::OptionSome); + && let PatKind::TupleStruct(ref pat_path, some_pat, _) = let_pat.kind + && is_res_lang_ctor(cx, cx.qpath_res(pat_path, let_pat.hir_id), LangItem::OptionSome) // check for call to `Iterator::next` - if let ExprKind::MethodCall(method_name, iter_expr, [], _) = let_expr.kind; - if method_name.ident.name == sym::next; - if is_trait_method(cx, let_expr, sym::Iterator); - if let Some(iter_expr_struct) = try_parse_iter_expr(cx, iter_expr); + && let ExprKind::MethodCall(method_name, iter_expr, [], _) = let_expr.kind + && method_name.ident.name == sym::next + && is_trait_method(cx, let_expr, sym::Iterator) + && let Some(iter_expr_struct) = try_parse_iter_expr(cx, iter_expr) // get the loop containing the match expression - if !uses_iter(cx, &iter_expr_struct, if_then); - then { - (let_expr, iter_expr_struct, iter_expr, some_pat, expr) + && !uses_iter(cx, &iter_expr_struct, if_then) + { + let mut applicability = Applicability::MachineApplicable; + let loop_var = if let Some(some_pat) = some_pat.first() { + if is_refutable(cx, some_pat) { + // Refutable patterns don't work with for loops. + return; + } + snippet_with_applicability(cx, some_pat.span, "..", &mut applicability) } else { - return; - } - }; - - let mut applicability = Applicability::MachineApplicable; - let loop_var = if let Some(some_pat) = some_pat.first() { - if is_refutable(cx, some_pat) { - // Refutable patterns don't work with for loops. - return; - } - snippet_with_applicability(cx, some_pat.span, "..", &mut applicability) - } else { - "_".into() - }; + "_".into() + }; - // If the iterator is a field or the iterator is accessed after the loop is complete it needs to be - // borrowed mutably. TODO: If the struct can be partially moved from and the struct isn't used - // afterwards a mutable borrow of a field isn't necessary. - let by_ref = if cx.typeck_results().expr_ty(iter_expr).ref_mutability() == Some(Mutability::Mut) - || !iter_expr_struct.can_move - || !iter_expr_struct.fields.is_empty() - || needs_mutable_borrow(cx, &iter_expr_struct, loop_expr) - { - ".by_ref()" - } else { - "" - }; + // If the iterator is a field or the iterator is accessed after the loop is complete it needs to be + // borrowed mutably. TODO: If the struct can be partially moved from and the struct isn't used + // afterwards a mutable borrow of a field isn't necessary. + let by_ref = if cx.typeck_results().expr_ty(iter_expr).ref_mutability() == Some(Mutability::Mut) + || !iter_expr_struct.can_move + || !iter_expr_struct.fields.is_empty() + || needs_mutable_borrow(cx, &iter_expr_struct, expr) + { + ".by_ref()" + } else { + "" + }; - let iterator = snippet_with_applicability(cx, iter_expr.span, "_", &mut applicability); - span_lint_and_sugg( - cx, - WHILE_LET_ON_ITERATOR, - expr.span.with_hi(scrutinee_expr.span.hi()), - "this loop could be written as a `for` loop", - "try", - format!("for {loop_var} in {iterator}{by_ref}"), - applicability, - ); + let iterator = snippet_with_applicability(cx, iter_expr.span, "_", &mut applicability); + span_lint_and_sugg( + cx, + WHILE_LET_ON_ITERATOR, + expr.span.with_hi(let_expr.span.hi()), + "this loop could be written as a `for` loop", + "try", + format!("for {loop_var} in {iterator}{by_ref}"), + applicability, + ); + } } #[derive(Debug)] diff --git a/src/tools/clippy/clippy_lints/src/macro_use.rs b/src/tools/clippy/clippy_lints/src/macro_use.rs index 9b158f18f..8d3e7520a 100644 --- a/src/tools/clippy/clippy_lints/src/macro_use.rs +++ b/src/tools/clippy/clippy_lints/src/macro_use.rs @@ -1,15 +1,15 @@ use clippy_utils::diagnostics::span_lint_hir_and_then; use clippy_utils::source::snippet; use hir::def::{DefKind, Res}; -use if_chain::if_chain; use rustc_ast::ast; -use rustc_data_structures::fx::{FxHashMap, FxHashSet}; +use rustc_data_structures::fx::FxHashSet; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_lint::{LateContext, LateLintPass, LintContext}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::edition::Edition; use rustc_span::{sym, Span}; +use std::collections::BTreeMap; declare_clippy_lint! { /// ### What it does @@ -89,30 +89,26 @@ impl MacroUseImports { impl<'tcx> LateLintPass<'tcx> for MacroUseImports { fn check_item(&mut self, cx: &LateContext<'_>, item: &hir::Item<'_>) { - if_chain! { - if cx.sess().opts.edition >= Edition::Edition2018; - if let hir::ItemKind::Use(path, _kind) = &item.kind; - let hir_id = item.hir_id(); - let attrs = cx.tcx.hir().attrs(hir_id); - if let Some(mac_attr) = attrs.iter().find(|attr| attr.has_name(sym::macro_use)); - if let Some(id) = path.res.iter().find_map(|res| match res { + if cx.sess().opts.edition >= Edition::Edition2018 + && let hir::ItemKind::Use(path, _kind) = &item.kind + && let hir_id = item.hir_id() + && let attrs = cx.tcx.hir().attrs(hir_id) + && let Some(mac_attr) = attrs.iter().find(|attr| attr.has_name(sym::macro_use)) + && let Some(id) = path.res.iter().find_map(|res| match res { Res::Def(DefKind::Mod, id) => Some(id), _ => None, - }); - if !id.is_local(); - then { - for kid in cx.tcx.module_children(id) { - if let Res::Def(DefKind::Macro(_mac_type), mac_id) = kid.res { - let span = mac_attr.span; - let def_path = cx.tcx.def_path_str(mac_id); - self.imports.push((def_path, span, hir_id)); - } - } - } else { - if item.span.from_expansion() { - self.push_unique_macro_pat_ty(cx, item.span); + }) + && !id.is_local() + { + for kid in cx.tcx.module_children(id) { + if let Res::Def(DefKind::Macro(_mac_type), mac_id) = kid.res { + let span = mac_attr.span; + let def_path = cx.tcx.def_path_str(mac_id); + self.imports.push((def_path, span, hir_id)); } } + } else if item.span.from_expansion() { + self.push_unique_macro_pat_ty(cx, item.span); } } fn check_attribute(&mut self, cx: &LateContext<'_>, attr: &ast::Attribute) { @@ -141,7 +137,7 @@ impl<'tcx> LateLintPass<'tcx> for MacroUseImports { } } fn check_crate_post(&mut self, cx: &LateContext<'_>) { - let mut used = FxHashMap::default(); + let mut used = BTreeMap::new(); let mut check_dup = vec![]; for (import, span, hir_id) in &self.imports { let found_idx = self.mac_refs.iter().position(|mac| import.ends_with(&mac.name)); @@ -190,20 +186,16 @@ impl<'tcx> LateLintPass<'tcx> for MacroUseImports { } } - let mut suggestions = vec![]; - for ((root, span, hir_id), path) in used { - if path.len() == 1 { - suggestions.push((span, format!("{root}::{}", path[0]), hir_id)); - } else { - suggestions.push((span, format!("{root}::{{{}}}", path.join(", ")), hir_id)); - } - } - // If mac_refs is not empty we have encountered an import we could not handle // such as `std::prelude::v1::foo` or some other macro that expands to an import. if self.mac_refs.is_empty() { - for (span, import, hir_id) in suggestions { - let help = format!("use {import};"); + for ((root, span, hir_id), path) in used { + let import = if let [single] = &path[..] { + format!("{root}::{single}") + } else { + format!("{root}::{{{}}}", path.join(", ")) + }; + span_lint_hir_and_then( cx, MACRO_USE_IMPORTS, @@ -214,7 +206,7 @@ impl<'tcx> LateLintPass<'tcx> for MacroUseImports { diag.span_suggestion( *span, "remove the attribute and import the macro directly, try", - help, + format!("use {import};"), Applicability::MaybeIncorrect, ); }, diff --git a/src/tools/clippy/clippy_lints/src/main_recursion.rs b/src/tools/clippy/clippy_lints/src/main_recursion.rs index 20333c150..a381b35cf 100644 --- a/src/tools/clippy/clippy_lints/src/main_recursion.rs +++ b/src/tools/clippy/clippy_lints/src/main_recursion.rs @@ -1,10 +1,9 @@ use clippy_utils::diagnostics::span_lint_and_help; use clippy_utils::source::snippet; use clippy_utils::{is_entrypoint_fn, is_no_std_crate}; -use if_chain::if_chain; use rustc_hir::{Expr, ExprKind, QPath}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; declare_clippy_lint! { /// ### What it does @@ -43,21 +42,19 @@ impl LateLintPass<'_> for MainRecursion { return; } - if_chain! { - if let ExprKind::Call(func, _) = &expr.kind; - if let ExprKind::Path(QPath::Resolved(_, path)) = &func.kind; - if let Some(def_id) = path.res.opt_def_id(); - if is_entrypoint_fn(cx, def_id); - then { - span_lint_and_help( - cx, - MAIN_RECURSION, - func.span, - &format!("recursing into entrypoint `{}`", snippet(cx, func.span, "main")), - None, - "consider using another function for this recursion" - ) - } + if let ExprKind::Call(func, _) = &expr.kind + && let ExprKind::Path(QPath::Resolved(_, path)) = &func.kind + && let Some(def_id) = path.res.opt_def_id() + && is_entrypoint_fn(cx, def_id) + { + span_lint_and_help( + cx, + MAIN_RECURSION, + func.span, + &format!("recursing into entrypoint `{}`", snippet(cx, func.span, "main")), + None, + "consider using another function for this recursion", + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/manual_assert.rs b/src/tools/clippy/clippy_lints/src/manual_assert.rs index 9a3da975f..4f6a2cf01 100644 --- a/src/tools/clippy/clippy_lints/src/manual_assert.rs +++ b/src/tools/clippy/clippy_lints/src/manual_assert.rs @@ -5,7 +5,7 @@ use clippy_utils::{is_else_clause, peel_blocks_with_stmt, span_extract_comment, use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind, UnOp}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/manual_async_fn.rs b/src/tools/clippy/clippy_lints/src/manual_async_fn.rs index 998de38a9..eaaaea0be 100644 --- a/src/tools/clippy/clippy_lints/src/manual_async_fn.rs +++ b/src/tools/clippy/clippy_lints/src/manual_async_fn.rs @@ -1,6 +1,5 @@ use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::source::{position_before_rarrow, snippet_block, snippet_opt}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::intravisit::FnKind; use rustc_hir::{ @@ -8,7 +7,7 @@ use rustc_hir::{ ImplItem, Item, ItemKind, LifetimeName, Node, Term, TraitRef, Ty, TyKind, TypeBindingKind, }; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::def_id::LocalDefId; use rustc_span::{sym, Span}; @@ -47,61 +46,57 @@ impl<'tcx> LateLintPass<'tcx> for ManualAsyncFn { span: Span, def_id: LocalDefId, ) { - if_chain! { - if let Some(header) = kind.header(); - if !header.asyncness.is_async(); + if let Some(header) = kind.header() + && !header.asyncness.is_async() // Check that this function returns `impl Future` - if let FnRetTy::Return(ret_ty) = decl.output; - if let Some((trait_ref, output_lifetimes)) = future_trait_ref(cx, ret_ty); - if let Some(output) = future_output_ty(trait_ref); - if captures_all_lifetimes(decl.inputs, &output_lifetimes); + && let FnRetTy::Return(ret_ty) = decl.output + && let Some((trait_ref, output_lifetimes)) = future_trait_ref(cx, ret_ty) + && let Some(output) = future_output_ty(trait_ref) + && captures_all_lifetimes(decl.inputs, &output_lifetimes) // Check that the body of the function consists of one async block - if let ExprKind::Block(block, _) = body.value.kind; - if block.stmts.is_empty(); - if let Some(closure_body) = desugared_async_block(cx, block); - if let Node::Item(Item {vis_span, ..}) | Node::ImplItem(ImplItem {vis_span, ..}) = - cx.tcx.hir().get_by_def_id(def_id); - then { - let header_span = span.with_hi(ret_ty.span.hi()); - - span_lint_and_then( - cx, - MANUAL_ASYNC_FN, - header_span, - "this function can be simplified using the `async fn` syntax", - |diag| { - if_chain! { - if let Some(vis_snip) = snippet_opt(cx, *vis_span); - if let Some(header_snip) = snippet_opt(cx, header_span); - if let Some(ret_pos) = position_before_rarrow(&header_snip); - if let Some((ret_sugg, ret_snip)) = suggested_ret(cx, output); - then { - let header_snip = if vis_snip.is_empty() { - format!("async {}", &header_snip[..ret_pos]) - } else { - format!("{} async {}", vis_snip, &header_snip[vis_snip.len() + 1..ret_pos]) - }; - - let help = format!("make the function `async` and {ret_sugg}"); - diag.span_suggestion( - header_span, - help, - format!("{header_snip}{ret_snip}"), - Applicability::MachineApplicable - ); - - let body_snip = snippet_block(cx, closure_body.value.span, "..", Some(block.span)); - diag.span_suggestion( - block.span, - "move the body of the async block to the enclosing function", - body_snip, - Applicability::MachineApplicable - ); - } - } - }, - ); - } + && let ExprKind::Block(block, _) = body.value.kind + && block.stmts.is_empty() + && let Some(closure_body) = desugared_async_block(cx, block) + && let Node::Item(Item {vis_span, ..}) | Node::ImplItem(ImplItem {vis_span, ..}) = + cx.tcx.hir_node_by_def_id(def_id) + { + let header_span = span.with_hi(ret_ty.span.hi()); + + span_lint_and_then( + cx, + MANUAL_ASYNC_FN, + header_span, + "this function can be simplified using the `async fn` syntax", + |diag| { + if let Some(vis_snip) = snippet_opt(cx, *vis_span) + && let Some(header_snip) = snippet_opt(cx, header_span) + && let Some(ret_pos) = position_before_rarrow(&header_snip) + && let Some((ret_sugg, ret_snip)) = suggested_ret(cx, output) + { + let header_snip = if vis_snip.is_empty() { + format!("async {}", &header_snip[..ret_pos]) + } else { + format!("{} async {}", vis_snip, &header_snip[vis_snip.len() + 1..ret_pos]) + }; + + let help = format!("make the function `async` and {ret_sugg}"); + diag.span_suggestion( + header_span, + help, + format!("{header_snip}{ret_snip}"), + Applicability::MachineApplicable, + ); + + let body_snip = snippet_block(cx, closure_body.value.span, "..", Some(block.span)); + diag.span_suggestion( + block.span, + "move the body of the async block to the enclosing function", + body_snip, + Applicability::MachineApplicable, + ); + } + }, + ); } } } @@ -110,48 +105,44 @@ fn future_trait_ref<'tcx>( cx: &LateContext<'tcx>, ty: &'tcx Ty<'tcx>, ) -> Option<(&'tcx TraitRef<'tcx>, Vec<LifetimeName>)> { - if_chain! { - if let TyKind::OpaqueDef(item_id, bounds, false) = ty.kind; - let item = cx.tcx.hir().item(item_id); - if let ItemKind::OpaqueTy(opaque) = &item.kind; - if let Some(trait_ref) = opaque.bounds.iter().find_map(|bound| { + if let TyKind::OpaqueDef(item_id, bounds, false) = ty.kind + && let item = cx.tcx.hir().item(item_id) + && let ItemKind::OpaqueTy(opaque) = &item.kind + && let Some(trait_ref) = opaque.bounds.iter().find_map(|bound| { if let GenericBound::Trait(poly, _) = bound { Some(&poly.trait_ref) } else { None } - }); - if trait_ref.trait_def_id() == cx.tcx.lang_items().future_trait(); - then { - let output_lifetimes = bounds - .iter() - .filter_map(|bound| { - if let GenericArg::Lifetime(lt) = bound { - Some(lt.res) - } else { - None - } - }) - .collect(); - - return Some((trait_ref, output_lifetimes)); - } + }) + && trait_ref.trait_def_id() == cx.tcx.lang_items().future_trait() + { + let output_lifetimes = bounds + .iter() + .filter_map(|bound| { + if let GenericArg::Lifetime(lt) = bound { + Some(lt.res) + } else { + None + } + }) + .collect(); + + return Some((trait_ref, output_lifetimes)); } None } fn future_output_ty<'tcx>(trait_ref: &'tcx TraitRef<'tcx>) -> Option<&'tcx Ty<'tcx>> { - if_chain! { - if let Some(segment) = trait_ref.path.segments.last(); - if let Some(args) = segment.args; - if args.bindings.len() == 1; - let binding = &args.bindings[0]; - if binding.ident.name == sym::Output; - if let TypeBindingKind::Equality { term: Term::Ty(output) } = binding.kind; - then { - return Some(output); - } + if let Some(segment) = trait_ref.path.segments.last() + && let Some(args) = segment.args + && args.bindings.len() == 1 + && let binding = &args.bindings[0] + && binding.ident.name == sym::Output + && let TypeBindingKind::Equality { term: Term::Ty(output) } = binding.kind + { + return Some(output); } None @@ -181,31 +172,26 @@ fn captures_all_lifetimes(inputs: &[Ty<'_>], output_lifetimes: &[LifetimeName]) } fn desugared_async_block<'tcx>(cx: &LateContext<'tcx>, block: &'tcx Block<'tcx>) -> Option<&'tcx Body<'tcx>> { - if_chain! { - if let Some(block_expr) = block.expr; - if let Expr { + if let Some(block_expr) = block.expr + && let Expr { kind: ExprKind::Closure(&Closure { body, .. }), .. - } = block_expr; - let closure_body = cx.tcx.hir().body(body); - if closure_body.coroutine_kind == Some(CoroutineKind::Async(CoroutineSource::Block)); - then { - return Some(closure_body); - } + } = block_expr + && let closure_body = cx.tcx.hir().body(body) + && closure_body.coroutine_kind == Some(CoroutineKind::Async(CoroutineSource::Block)) + { + return Some(closure_body); } None } fn suggested_ret(cx: &LateContext<'_>, output: &Ty<'_>) -> Option<(&'static str, String)> { - match output.kind { - TyKind::Tup(tys) if tys.is_empty() => { - let sugg = "remove the return type"; - Some((sugg, String::new())) - }, - _ => { - let sugg = "return the output of the future directly"; - snippet_opt(cx, output.span).map(|snip| (sugg, format!(" -> {snip}"))) - }, + if let TyKind::Tup([]) = output.kind { + let sugg = "remove the return type"; + Some((sugg, String::new())) + } else { + let sugg = "return the output of the future directly"; + snippet_opt(cx, output.span).map(|snip| (sugg, format!(" -> {snip}"))) } } diff --git a/src/tools/clippy/clippy_lints/src/manual_bits.rs b/src/tools/clippy/clippy_lints/src/manual_bits.rs index cd614c895..96c652283 100644 --- a/src/tools/clippy/clippy_lints/src/manual_bits.rs +++ b/src/tools/clippy/clippy_lints/src/manual_bits.rs @@ -8,7 +8,7 @@ use rustc_hir::{BinOpKind, Expr, ExprKind, GenericArg, QPath}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; use rustc_middle::ty::{self, Ty}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::sym; declare_clippy_lint! { @@ -53,32 +53,30 @@ impl<'tcx> LateLintPass<'tcx> for ManualBits { return; } - if_chain! { - if let ExprKind::Binary(bin_op, left_expr, right_expr) = expr.kind; - if let BinOpKind::Mul = &bin_op.node; - if !in_external_macro(cx.sess(), expr.span); - let ctxt = expr.span.ctxt(); - if left_expr.span.ctxt() == ctxt; - if right_expr.span.ctxt() == ctxt; - if let Some((real_ty, resolved_ty, other_expr)) = get_one_size_of_ty(cx, left_expr, right_expr); - if matches!(resolved_ty.kind(), ty::Int(_) | ty::Uint(_)); - if let ExprKind::Lit(lit) = &other_expr.kind; - if let LitKind::Int(8, _) = lit.node; - then { - let mut app = Applicability::MachineApplicable; - let ty_snip = snippet_with_context(cx, real_ty.span, ctxt, "..", &mut app).0; - let sugg = create_sugg(cx, expr, format!("{ty_snip}::BITS")); - - span_lint_and_sugg( - cx, - MANUAL_BITS, - expr.span, - "usage of `mem::size_of::<T>()` to obtain the size of `T` in bits", - "consider using", - sugg, - app, - ); - } + if let ExprKind::Binary(bin_op, left_expr, right_expr) = expr.kind + && let BinOpKind::Mul = &bin_op.node + && !in_external_macro(cx.sess(), expr.span) + && let ctxt = expr.span.ctxt() + && left_expr.span.ctxt() == ctxt + && right_expr.span.ctxt() == ctxt + && let Some((real_ty, resolved_ty, other_expr)) = get_one_size_of_ty(cx, left_expr, right_expr) + && matches!(resolved_ty.kind(), ty::Int(_) | ty::Uint(_)) + && let ExprKind::Lit(lit) = &other_expr.kind + && let LitKind::Int(8, _) = lit.node + { + let mut app = Applicability::MachineApplicable; + let ty_snip = snippet_with_context(cx, real_ty.span, ctxt, "..", &mut app).0; + let sugg = create_sugg(cx, expr, format!("{ty_snip}::BITS")); + + span_lint_and_sugg( + cx, + MANUAL_BITS, + expr.span, + "usage of `mem::size_of::<T>()` to obtain the size of `T` in bits", + "consider using", + sugg, + app, + ); } } @@ -98,22 +96,22 @@ fn get_one_size_of_ty<'tcx>( } fn get_size_of_ty<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) -> Option<(&'tcx rustc_hir::Ty<'tcx>, Ty<'tcx>)> { - if_chain! { - if let ExprKind::Call(count_func, _func_args) = expr.kind; - if let ExprKind::Path(ref count_func_qpath) = count_func.kind; - - if let QPath::Resolved(_, count_func_path) = count_func_qpath; - if let Some(segment_zero) = count_func_path.segments.first(); - if let Some(args) = segment_zero.args; - if let Some(GenericArg::Type(real_ty)) = args.args.first(); - - if let Some(def_id) = cx.qpath_res(count_func_qpath, count_func.hir_id).opt_def_id(); - if cx.tcx.is_diagnostic_item(sym::mem_size_of, def_id); - then { - cx.typeck_results().node_args(count_func.hir_id).types().next().map(|resolved_ty| (*real_ty, resolved_ty)) - } else { - None - } + if let ExprKind::Call(count_func, _func_args) = expr.kind + && let ExprKind::Path(ref count_func_qpath) = count_func.kind + && let QPath::Resolved(_, count_func_path) = count_func_qpath + && let Some(segment_zero) = count_func_path.segments.first() + && let Some(args) = segment_zero.args + && let Some(GenericArg::Type(real_ty)) = args.args.first() + && let Some(def_id) = cx.qpath_res(count_func_qpath, count_func.hir_id).opt_def_id() + && cx.tcx.is_diagnostic_item(sym::mem_size_of, def_id) + { + cx.typeck_results() + .node_args(count_func.hir_id) + .types() + .next() + .map(|resolved_ty| (*real_ty, resolved_ty)) + } else { + None } } diff --git a/src/tools/clippy/clippy_lints/src/manual_clamp.rs b/src/tools/clippy/clippy_lints/src/manual_clamp.rs index 09c90e38e..385fe387a 100644 --- a/src/tools/clippy/clippy_lints/src/manual_clamp.rs +++ b/src/tools/clippy/clippy_lints/src/manual_clamp.rs @@ -14,7 +14,7 @@ use rustc_hir::def::Res; use rustc_hir::{Arm, BinOpKind, Block, Expr, ExprKind, Guard, HirId, PatKind, PathSegment, PrimTy, QPath, StmtKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::Ty; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::symbol::sym; use rustc_span::Span; use std::ops::Deref; diff --git a/src/tools/clippy/clippy_lints/src/manual_float_methods.rs b/src/tools/clippy/clippy_lints/src/manual_float_methods.rs index f923e0ac8..72cf1d7a3 100644 --- a/src/tools/clippy/clippy_lints/src/manual_float_methods.rs +++ b/src/tools/clippy/clippy_lints/src/manual_float_methods.rs @@ -6,7 +6,7 @@ use rustc_errors::Applicability; use rustc_hir::{BinOpKind, Constness, Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass, Lint, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/manual_hash_one.rs b/src/tools/clippy/clippy_lints/src/manual_hash_one.rs index 472b4eb90..252b3a83a 100644 --- a/src/tools/clippy/clippy_lints/src/manual_hash_one.rs +++ b/src/tools/clippy/clippy_lints/src/manual_hash_one.rs @@ -6,7 +6,7 @@ use clippy_utils::{is_trait_method, path_to_local_id}; use rustc_errors::Applicability; use rustc_hir::{BindingAnnotation, ExprKind, Local, Node, PatKind, StmtKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::sym; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/manual_is_ascii_check.rs b/src/tools/clippy/clippy_lints/src/manual_is_ascii_check.rs index 468f41707..e433c5a3b 100644 --- a/src/tools/clippy/clippy_lints/src/manual_is_ascii_check.rs +++ b/src/tools/clippy/clippy_lints/src/manual_is_ascii_check.rs @@ -8,7 +8,7 @@ use rustc_ast::LitKind::{Byte, Char}; use rustc_errors::Applicability; use rustc_hir::{BorrowKind, Expr, ExprKind, PatKind, RangeEnd}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::def_id::DefId; use rustc_span::{sym, Span}; diff --git a/src/tools/clippy/clippy_lints/src/manual_let_else.rs b/src/tools/clippy/clippy_lints/src/manual_let_else.rs index 170a040d4..92dc4d57a 100644 --- a/src/tools/clippy/clippy_lints/src/manual_let_else.rs +++ b/src/tools/clippy/clippy_lints/src/manual_let_else.rs @@ -5,18 +5,15 @@ use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::higher::IfLetOrMatch; use clippy_utils::source::snippet_with_context; use clippy_utils::ty::is_type_diagnostic_item; -use clippy_utils::visitors::{Descend, Visitable}; -use clippy_utils::{is_lint_allowed, pat_and_expr_can_be_question_mark, peel_blocks}; +use clippy_utils::{is_lint_allowed, is_never_expr, pat_and_expr_can_be_question_mark, peel_blocks}; use rustc_data_structures::fx::{FxHashMap, FxHashSet}; use rustc_errors::Applicability; -use rustc_hir::intravisit::{walk_expr, Visitor}; -use rustc_hir::{Expr, ExprKind, HirId, ItemId, Local, MatchSource, Pat, PatKind, QPath, Stmt, StmtKind, Ty}; +use rustc_hir::{Expr, ExprKind, MatchSource, Pat, PatKind, QPath, Stmt, StmtKind}; use rustc_lint::{LateContext, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::declare_tool_lint; + use rustc_span::symbol::{sym, Symbol}; use rustc_span::Span; -use std::ops::ControlFlow; use std::slice; declare_clippy_lint! { @@ -51,7 +48,7 @@ declare_clippy_lint! { } impl<'tcx> QuestionMark { - pub(crate) fn check_manual_let_else(&mut self, cx: &LateContext<'_>, stmt: &'tcx Stmt<'tcx>) { + pub(crate) fn check_manual_let_else(&mut self, cx: &LateContext<'tcx>, stmt: &'tcx Stmt<'tcx>) { if !self.msrv.meets(msrvs::LET_ELSE) || in_external_macro(cx.sess(), stmt.span) { return; } @@ -67,7 +64,7 @@ impl<'tcx> QuestionMark { IfLetOrMatch::IfLet(if_let_expr, let_pat, if_then, if_else) => { if let Some(ident_map) = expr_simple_identity_map(local.pat, let_pat, if_then) && let Some(if_else) = if_else - && expr_diverges(cx, if_else) + && is_never_expr(cx, if_else).is_some() && let qm_allowed = is_lint_allowed(cx, QUESTION_MARK, stmt.hir_id) && (qm_allowed || pat_and_expr_can_be_question_mark(cx, let_pat, if_else).is_none()) { @@ -91,10 +88,9 @@ impl<'tcx> QuestionMark { return; } let check_types = self.matches_behaviour == MatchLintBehaviour::WellKnownTypes; - let diverging_arm_opt = arms - .iter() - .enumerate() - .find(|(_, arm)| expr_diverges(cx, arm.body) && pat_allowed_for_else(cx, arm.pat, check_types)); + let diverging_arm_opt = arms.iter().enumerate().find(|(_, arm)| { + is_never_expr(cx, arm.body).is_some() && pat_allowed_for_else(cx, arm.pat, check_types) + }); let Some((idx, diverging_arm)) = diverging_arm_opt else { return; }; @@ -272,104 +268,6 @@ fn replace_in_pattern( sn_pat.into_owned() } -/// Check whether an expression is divergent. May give false negatives. -fn expr_diverges(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool { - struct V<'cx, 'tcx> { - cx: &'cx LateContext<'tcx>, - res: ControlFlow<(), Descend>, - } - impl<'tcx> Visitor<'tcx> for V<'_, '_> { - fn visit_expr(&mut self, e: &'tcx Expr<'tcx>) { - fn is_never(cx: &LateContext<'_>, expr: &'_ Expr<'_>) -> bool { - if let Some(ty) = cx.typeck_results().expr_ty_opt(expr) { - return ty.is_never(); - } - false - } - - if self.res.is_break() { - return; - } - - // We can't just call is_never on expr and be done, because the type system - // sometimes coerces the ! type to something different before we can get - // our hands on it. So instead, we do a manual search. We do fall back to - // is_never in some places when there is no better alternative. - self.res = match e.kind { - ExprKind::Continue(_) | ExprKind::Break(_, _) | ExprKind::Ret(_) => ControlFlow::Break(()), - ExprKind::Call(call, _) => { - if is_never(self.cx, e) || is_never(self.cx, call) { - ControlFlow::Break(()) - } else { - ControlFlow::Continue(Descend::Yes) - } - }, - ExprKind::MethodCall(..) => { - if is_never(self.cx, e) { - ControlFlow::Break(()) - } else { - ControlFlow::Continue(Descend::Yes) - } - }, - ExprKind::If(if_expr, if_then, if_else) => { - let else_diverges = if_else.map_or(false, |ex| expr_diverges(self.cx, ex)); - let diverges = - expr_diverges(self.cx, if_expr) || (else_diverges && expr_diverges(self.cx, if_then)); - if diverges { - ControlFlow::Break(()) - } else { - ControlFlow::Continue(Descend::No) - } - }, - ExprKind::Match(match_expr, match_arms, _) => { - let diverges = expr_diverges(self.cx, match_expr) - || match_arms.iter().all(|arm| { - let guard_diverges = arm.guard.as_ref().map_or(false, |g| expr_diverges(self.cx, g.body())); - guard_diverges || expr_diverges(self.cx, arm.body) - }); - if diverges { - ControlFlow::Break(()) - } else { - ControlFlow::Continue(Descend::No) - } - }, - - // Don't continue into loops or labeled blocks, as they are breakable, - // and we'd have to start checking labels. - ExprKind::Block(_, Some(_)) | ExprKind::Loop(..) => ControlFlow::Continue(Descend::No), - - // Default: descend - _ => ControlFlow::Continue(Descend::Yes), - }; - if let ControlFlow::Continue(Descend::Yes) = self.res { - walk_expr(self, e); - } - } - - fn visit_local(&mut self, local: &'tcx Local<'_>) { - // Don't visit the else block of a let/else statement as it will not make - // the statement divergent even though the else block is divergent. - if let Some(init) = local.init { - self.visit_expr(init); - } - } - - // Avoid unnecessary `walk_*` calls. - fn visit_ty(&mut self, _: &'tcx Ty<'tcx>) {} - fn visit_pat(&mut self, _: &'tcx Pat<'tcx>) {} - fn visit_qpath(&mut self, _: &'tcx QPath<'tcx>, _: HirId, _: Span) {} - // Avoid monomorphising all `visit_*` functions. - fn visit_nested_item(&mut self, _: ItemId) {} - } - - let mut v = V { - cx, - res: ControlFlow::Continue(Descend::Yes), - }; - expr.visit(&mut v); - v.res.is_break() -} - fn pat_allowed_for_else(cx: &LateContext<'_>, pat: &'_ Pat<'_>, check_types: bool) -> bool { // Check whether the pattern contains any bindings, as the // binding might potentially be used in the body. diff --git a/src/tools/clippy/clippy_lints/src/manual_main_separator_str.rs b/src/tools/clippy/clippy_lints/src/manual_main_separator_str.rs index 23f47c86f..5732bdda7 100644 --- a/src/tools/clippy/clippy_lints/src/manual_main_separator_str.rs +++ b/src/tools/clippy/clippy_lints/src/manual_main_separator_str.rs @@ -6,7 +6,7 @@ use rustc_hir::def::{DefKind, Res}; use rustc_hir::{Expr, ExprKind, Mutability, QPath}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::sym; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/manual_non_exhaustive.rs b/src/tools/clippy/clippy_lints/src/manual_non_exhaustive.rs index fc8f23630..d2ac0ad83 100644 --- a/src/tools/clippy/clippy_lints/src/manual_non_exhaustive.rs +++ b/src/tools/clippy/clippy_lints/src/manual_non_exhaustive.rs @@ -9,7 +9,7 @@ use rustc_errors::Applicability; use rustc_hir::def::{CtorKind, CtorOf, DefKind, Res}; use rustc_hir::{self as hir, Expr, ExprKind, QPath}; use rustc_lint::{EarlyContext, EarlyLintPass, LateContext, LateLintPass, LintContext}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::def_id::{DefId, LocalDefId}; use rustc_span::{sym, Span}; @@ -103,7 +103,7 @@ impl EarlyLintPass for ManualNonExhaustiveStruct { if let ast::ItemKind::Struct(variant_data, _) = &item.kind { let (fields, delimiter) = match variant_data { - ast::VariantData::Struct(fields, _) => (&**fields, '{'), + ast::VariantData::Struct { fields, .. } => (&**fields, '{'), ast::VariantData::Tuple(fields, _) => (&**fields, '('), ast::VariantData::Unit(_) => return, }; @@ -118,7 +118,6 @@ impl EarlyLintPass for ManualNonExhaustiveStruct { if let Some(Ok(field)) = iter.next() && iter.next().is_none() && field.ty.kind.is_unit() - && field.ident.map_or(true, |name| name.as_str().starts_with('_')) { span_lint_and_then( cx, @@ -158,7 +157,6 @@ impl<'tcx> LateLintPass<'tcx> for ManualNonExhaustiveEnum { { let mut iter = def.variants.iter().filter_map(|v| { (matches!(v.data, hir::VariantData::Unit(_, _)) - && v.ident.as_str().starts_with('_') && is_doc_hidden(cx.tcx.hir().attrs(v.hir_id)) && !attr::contains_name(cx.tcx.hir().attrs(item.hir_id()), sym::non_exhaustive)) .then_some((v.def_id, v.span)) @@ -173,9 +171,7 @@ impl<'tcx> LateLintPass<'tcx> for ManualNonExhaustiveEnum { fn check_expr(&mut self, cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) { if let ExprKind::Path(QPath::Resolved(None, p)) = &e.kind - && let [.., name] = p.segments && let Res::Def(DefKind::Ctor(CtorOf::Variant, CtorKind::Const), id) = p.res - && name.ident.as_str().starts_with('_') { let variant_id = cx.tcx.parent(id); let enum_id = cx.tcx.parent(variant_id); @@ -192,7 +188,7 @@ impl<'tcx> LateLintPass<'tcx> for ManualNonExhaustiveEnum { .contains(&(enum_id.to_def_id(), variant_id.to_def_id())) }) { - let hir_id = cx.tcx.hir().local_def_id_to_hir_id(enum_id); + let hir_id = cx.tcx.local_def_id_to_hir_id(enum_id); span_lint_hir_and_then( cx, MANUAL_NON_EXHAUSTIVE, diff --git a/src/tools/clippy/clippy_lints/src/manual_range_patterns.rs b/src/tools/clippy/clippy_lints/src/manual_range_patterns.rs index d24bfe182..d585290f7 100644 --- a/src/tools/clippy/clippy_lints/src/manual_range_patterns.rs +++ b/src/tools/clippy/clippy_lints/src/manual_range_patterns.rs @@ -6,7 +6,7 @@ use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind, PatKind, RangeEnd, UnOp}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::{Span, DUMMY_SP}; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/manual_rem_euclid.rs b/src/tools/clippy/clippy_lints/src/manual_rem_euclid.rs index bc8372fbd..71a83a68d 100644 --- a/src/tools/clippy/clippy_lints/src/manual_rem_euclid.rs +++ b/src/tools/clippy/clippy_lints/src/manual_rem_euclid.rs @@ -7,7 +7,7 @@ use rustc_errors::Applicability; use rustc_hir::{BinOpKind, Expr, ExprKind, Node, TyKind}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; declare_clippy_lint! { /// ### What it does @@ -76,7 +76,7 @@ impl<'tcx> LateLintPass<'tcx> for ManualRemEuclid { // Also ensures the const is nonzero since zero can't be a divisor && const1 == const2 && const2 == const3 && let Some(hir_id) = path_to_local(expr3) - && let Some(Node::Pat(_)) = cx.tcx.hir().find(hir_id) + && let Some(Node::Pat(_)) = cx.tcx.opt_hir_node(hir_id) { // Apply only to params or locals with annotated types match cx.tcx.hir().find_parent(hir_id) { diff --git a/src/tools/clippy/clippy_lints/src/manual_retain.rs b/src/tools/clippy/clippy_lints/src/manual_retain.rs index 2f8682d04..1fe247dac 100644 --- a/src/tools/clippy/clippy_lints/src/manual_retain.rs +++ b/src/tools/clippy/clippy_lints/src/manual_retain.rs @@ -9,7 +9,7 @@ use rustc_hir::def_id::DefId; use rustc_hir::ExprKind::Assign; use rustc_lint::{LateContext, LateLintPass}; use rustc_semver::RustcVersion; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::symbol::sym; const ACCEPTABLE_METHODS: [&[&str]; 5] = [ diff --git a/src/tools/clippy/clippy_lints/src/manual_slice_size_calculation.rs b/src/tools/clippy/clippy_lints/src/manual_slice_size_calculation.rs index 3b97d1659..1de686dbc 100644 --- a/src/tools/clippy/clippy_lints/src/manual_slice_size_calculation.rs +++ b/src/tools/clippy/clippy_lints/src/manual_slice_size_calculation.rs @@ -5,7 +5,7 @@ use rustc_errors::Applicability; use rustc_hir::{BinOpKind, Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::symbol::sym; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/manual_string_new.rs b/src/tools/clippy/clippy_lints/src/manual_string_new.rs index f8afae0e1..781db4b97 100644 --- a/src/tools/clippy/clippy_lints/src/manual_string_new.rs +++ b/src/tools/clippy/clippy_lints/src/manual_string_new.rs @@ -4,7 +4,7 @@ use rustc_errors::Applicability::MachineApplicable; use rustc_hir::{Expr, ExprKind, PathSegment, QPath, TyKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::{sym, symbol, Span}; declare_clippy_lint! { @@ -108,18 +108,16 @@ fn parse_call(cx: &LateContext<'_>, span: Span, func: &Expr<'_>, args: &[Expr<'_ let arg_kind = &args[0].kind; if let ExprKind::Path(qpath) = &func.kind { - if let QPath::TypeRelative(_, _) = qpath { - // String::from(...) or String::try_from(...) - if let QPath::TypeRelative(ty, path_seg) = qpath - && [sym::from, sym::try_from].contains(&path_seg.ident.name) - && let TyKind::Path(qpath) = &ty.kind - && let QPath::Resolved(_, path) = qpath - && let [path_seg] = path.segments - && path_seg.ident.name == sym::String - && is_expr_kind_empty_str(arg_kind) - { - warn_then_suggest(cx, span); - } + // String::from(...) or String::try_from(...) + if let QPath::TypeRelative(ty, path_seg) = qpath + && [sym::from, sym::try_from].contains(&path_seg.ident.name) + && let TyKind::Path(qpath) = &ty.kind + && let QPath::Resolved(_, path) = qpath + && let [path_seg] = path.segments + && path_seg.ident.name == sym::String + && is_expr_kind_empty_str(arg_kind) + { + warn_then_suggest(cx, span); } else if let QPath::Resolved(_, path) = qpath { // From::from(...) or TryFrom::try_from(...) if let [path_seg1, path_seg2] = path.segments diff --git a/src/tools/clippy/clippy_lints/src/manual_strip.rs b/src/tools/clippy/clippy_lints/src/manual_strip.rs index 9a9e6af50..7b04fd28b 100644 --- a/src/tools/clippy/clippy_lints/src/manual_strip.rs +++ b/src/tools/clippy/clippy_lints/src/manual_strip.rs @@ -4,14 +4,13 @@ use clippy_utils::diagnostics::{multispan_sugg, span_lint_and_then}; use clippy_utils::source::snippet; use clippy_utils::usage::mutated_variables; use clippy_utils::{eq_expr_value, higher, match_def_path, paths}; -use if_chain::if_chain; use rustc_ast::ast::LitKind; use rustc_hir::def::Res; use rustc_hir::intravisit::{walk_expr, Visitor}; use rustc_hir::{BinOpKind, BorrowKind, Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::source_map::Spanned; use rustc_span::Span; @@ -71,55 +70,61 @@ impl<'tcx> LateLintPass<'tcx> for ManualStrip { return; } - if_chain! { - if let Some(higher::If { cond, then, .. }) = higher::If::hir(expr); - if let ExprKind::MethodCall(_, target_arg, [pattern], _) = cond.kind; - if let Some(method_def_id) = cx.typeck_results().type_dependent_def_id(cond.hir_id); - if let ExprKind::Path(target_path) = &target_arg.kind; - then { - let strip_kind = if match_def_path(cx, method_def_id, &paths::STR_STARTS_WITH) { - StripKind::Prefix - } else if match_def_path(cx, method_def_id, &paths::STR_ENDS_WITH) { - StripKind::Suffix - } else { - return; - }; - let target_res = cx.qpath_res(target_path, target_arg.hir_id); - if target_res == Res::Err { - return; - }; - - if_chain! { - if let Res::Local(hir_id) = target_res; - if let Some(used_mutably) = mutated_variables(then, cx); - if used_mutably.contains(&hir_id); - then { - return; - } - } - - let strippings = find_stripping(cx, strip_kind, target_res, pattern, then); - if !strippings.is_empty() { + if let Some(higher::If { cond, then, .. }) = higher::If::hir(expr) + && let ExprKind::MethodCall(_, target_arg, [pattern], _) = cond.kind + && let Some(method_def_id) = cx.typeck_results().type_dependent_def_id(cond.hir_id) + && let ExprKind::Path(target_path) = &target_arg.kind + { + let strip_kind = if match_def_path(cx, method_def_id, &paths::STR_STARTS_WITH) { + StripKind::Prefix + } else if match_def_path(cx, method_def_id, &paths::STR_ENDS_WITH) { + StripKind::Suffix + } else { + return; + }; + let target_res = cx.qpath_res(target_path, target_arg.hir_id); + if target_res == Res::Err { + return; + }; + + if let Res::Local(hir_id) = target_res + && let Some(used_mutably) = mutated_variables(then, cx) + && used_mutably.contains(&hir_id) + { + return; + } - let kind_word = match strip_kind { - StripKind::Prefix => "prefix", - StripKind::Suffix => "suffix", - }; + let strippings = find_stripping(cx, strip_kind, target_res, pattern, then); + if !strippings.is_empty() { + let kind_word = match strip_kind { + StripKind::Prefix => "prefix", + StripKind::Suffix => "suffix", + }; - let test_span = expr.span.until(then.span); - span_lint_and_then(cx, MANUAL_STRIP, strippings[0], &format!("stripping a {kind_word} manually"), |diag| { + let test_span = expr.span.until(then.span); + span_lint_and_then( + cx, + MANUAL_STRIP, + strippings[0], + &format!("stripping a {kind_word} manually"), + |diag| { diag.span_note(test_span, format!("the {kind_word} was tested here")); multispan_sugg( diag, &format!("try using the `strip_{kind_word}` method"), - vec![(test_span, - format!("if let Some(<stripped>) = {}.strip_{kind_word}({}) ", - snippet(cx, target_arg.span, ".."), - snippet(cx, pattern.span, "..")))] - .into_iter().chain(strippings.into_iter().map(|span| (span, "<stripped>".into()))), + vec![( + test_span, + format!( + "if let Some(<stripped>) = {}.strip_{kind_word}({}) ", + snippet(cx, target_arg.span, ".."), + snippet(cx, pattern.span, "..") + ), + )] + .into_iter() + .chain(strippings.into_iter().map(|span| (span, "<stripped>".into()))), ); - }); - } + }, + ); } } } @@ -129,15 +134,13 @@ impl<'tcx> LateLintPass<'tcx> for ManualStrip { // Returns `Some(arg)` if `expr` matches `arg.len()` and `None` otherwise. fn len_arg<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) -> Option<&'tcx Expr<'tcx>> { - if_chain! { - if let ExprKind::MethodCall(_, arg, [], _) = expr.kind; - if let Some(method_def_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id); - if match_def_path(cx, method_def_id, &paths::STR_LEN); - then { - Some(arg) - } else { - None - } + if let ExprKind::MethodCall(_, arg, [], _) = expr.kind + && let Some(method_def_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id) + && match_def_path(cx, method_def_id, &paths::STR_LEN) + { + Some(arg) + } else { + None } } @@ -201,36 +204,38 @@ fn find_stripping<'tcx>( impl<'a, 'tcx> Visitor<'tcx> for StrippingFinder<'a, 'tcx> { fn visit_expr(&mut self, ex: &'tcx Expr<'_>) { - if_chain! { - if is_ref_str(self.cx, ex); - let unref = peel_ref(ex); - if let ExprKind::Index(indexed, index, _) = &unref.kind; - if let Some(higher::Range { start, end, .. }) = higher::Range::hir(index); - if let ExprKind::Path(path) = &indexed.kind; - if self.cx.qpath_res(path, ex.hir_id) == self.target; - then { - match (self.strip_kind, start, end) { - (StripKind::Prefix, Some(start), None) => { - if eq_pattern_length(self.cx, self.pattern, start) { - self.results.push(ex.span); - return; - } - }, - (StripKind::Suffix, None, Some(end)) => { - if_chain! { - if let ExprKind::Binary(Spanned { node: BinOpKind::Sub, .. }, left, right) = end.kind; - if let Some(left_arg) = len_arg(self.cx, left); - if let ExprKind::Path(left_path) = &left_arg.kind; - if self.cx.qpath_res(left_path, left_arg.hir_id) == self.target; - if eq_pattern_length(self.cx, self.pattern, right); - then { - self.results.push(ex.span); - return; - } - } - }, - _ => {} - } + if is_ref_str(self.cx, ex) + && let unref = peel_ref(ex) + && let ExprKind::Index(indexed, index, _) = &unref.kind + && let Some(higher::Range { start, end, .. }) = higher::Range::hir(index) + && let ExprKind::Path(path) = &indexed.kind + && self.cx.qpath_res(path, ex.hir_id) == self.target + { + match (self.strip_kind, start, end) { + (StripKind::Prefix, Some(start), None) => { + if eq_pattern_length(self.cx, self.pattern, start) { + self.results.push(ex.span); + return; + } + }, + (StripKind::Suffix, None, Some(end)) => { + if let ExprKind::Binary( + Spanned { + node: BinOpKind::Sub, .. + }, + left, + right, + ) = end.kind + && let Some(left_arg) = len_arg(self.cx, left) + && let ExprKind::Path(left_path) = &left_arg.kind + && self.cx.qpath_res(left_path, left_arg.hir_id) == self.target + && eq_pattern_length(self.cx, self.pattern, right) + { + self.results.push(ex.span); + return; + } + }, + _ => {}, } } diff --git a/src/tools/clippy/clippy_lints/src/map_unit_fn.rs b/src/tools/clippy/clippy_lints/src/map_unit_fn.rs index 817d072b9..3b82c50a8 100644 --- a/src/tools/clippy/clippy_lints/src/map_unit_fn.rs +++ b/src/tools/clippy/clippy_lints/src/map_unit_fn.rs @@ -2,12 +2,11 @@ use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::source::{snippet, snippet_with_applicability, snippet_with_context}; use clippy_utils::ty::is_type_diagnostic_item; use clippy_utils::{iter_input_pats, method_chain_args}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::{self, Ty}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::{sym, Span}; declare_clippy_lint! { @@ -163,16 +162,14 @@ fn unit_closure<'tcx>( cx: &LateContext<'tcx>, expr: &hir::Expr<'_>, ) -> Option<(&'tcx hir::Param<'tcx>, &'tcx hir::Expr<'tcx>)> { - if_chain! { - if let hir::ExprKind::Closure(&hir::Closure { fn_decl, body, .. }) = expr.kind; - let body = cx.tcx.hir().body(body); - let body_expr = &body.value; - if fn_decl.inputs.len() == 1; - if is_unit_expression(cx, body_expr); - if let Some(binding) = iter_input_pats(fn_decl, body).next(); - then { - return Some((binding, body_expr)); - } + if let hir::ExprKind::Closure(&hir::Closure { fn_decl, body, .. }) = expr.kind + && let body = cx.tcx.hir().body(body) + && let body_expr = &body.value + && fn_decl.inputs.len() == 1 + && is_unit_expression(cx, body_expr) + && let Some(binding) = iter_input_pats(fn_decl, body).next() + { + return Some((binding, body_expr)); } None } diff --git a/src/tools/clippy/clippy_lints/src/match_result_ok.rs b/src/tools/clippy/clippy_lints/src/match_result_ok.rs index 841c020f2..62cedc884 100644 --- a/src/tools/clippy/clippy_lints/src/match_result_ok.rs +++ b/src/tools/clippy/clippy_lints/src/match_result_ok.rs @@ -2,11 +2,10 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet_with_context; use clippy_utils::ty::is_type_diagnostic_item; use clippy_utils::{higher, is_res_lang_ctor}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind, LangItem, PatKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { @@ -56,33 +55,31 @@ impl<'tcx> LateLintPass<'tcx> for MatchResultOk { return; }; - if_chain! { - if let ExprKind::MethodCall(ok_path, recv, [], ..) = let_expr.kind; //check is expr.ok() has type Result<T,E>.ok(, _) - if let PatKind::TupleStruct(ref pat_path, [ok_pat], _) = let_pat.kind; //get operation - if ok_path.ident.as_str() == "ok"; - if is_type_diagnostic_item(cx, cx.typeck_results().expr_ty(recv), sym::Result); - if is_res_lang_ctor(cx, cx.qpath_res(pat_path, let_pat.hir_id), LangItem::OptionSome); - let ctxt = expr.span.ctxt(); - if let_expr.span.ctxt() == ctxt; - if let_pat.span.ctxt() == ctxt; - then { - let mut applicability = Applicability::MachineApplicable; - let some_expr_string = snippet_with_context(cx, ok_pat.span, ctxt, "", &mut applicability).0; - let trimmed_ok = snippet_with_context(cx, recv.span, ctxt, "", &mut applicability).0; - let sugg = format!( - "{ifwhile} let Ok({some_expr_string}) = {}", - trimmed_ok.trim().trim_end_matches('.'), - ); - span_lint_and_sugg( - cx, - MATCH_RESULT_OK, - expr.span.with_hi(let_expr.span.hi()), - "matching on `Some` with `ok()` is redundant", - &format!("consider matching on `Ok({some_expr_string})` and removing the call to `ok` instead"), - sugg, - applicability, - ); - } + if let ExprKind::MethodCall(ok_path, recv, [], ..) = let_expr.kind //check is expr.ok() has type Result<T,E>.ok(, _) + && let PatKind::TupleStruct(ref pat_path, [ok_pat], _) = let_pat.kind //get operation + && ok_path.ident.as_str() == "ok" + && is_type_diagnostic_item(cx, cx.typeck_results().expr_ty(recv), sym::Result) + && is_res_lang_ctor(cx, cx.qpath_res(pat_path, let_pat.hir_id), LangItem::OptionSome) + && let ctxt = expr.span.ctxt() + && let_expr.span.ctxt() == ctxt + && let_pat.span.ctxt() == ctxt + { + let mut applicability = Applicability::MachineApplicable; + let some_expr_string = snippet_with_context(cx, ok_pat.span, ctxt, "", &mut applicability).0; + let trimmed_ok = snippet_with_context(cx, recv.span, ctxt, "", &mut applicability).0; + let sugg = format!( + "{ifwhile} let Ok({some_expr_string}) = {}", + trimmed_ok.trim().trim_end_matches('.'), + ); + span_lint_and_sugg( + cx, + MATCH_RESULT_OK, + expr.span.with_hi(let_expr.span.hi()), + "matching on `Some` with `ok()` is redundant", + &format!("consider matching on `Ok({some_expr_string})` and removing the call to `ok` instead"), + sugg, + applicability, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/matches/collapsible_match.rs b/src/tools/clippy/clippy_lints/src/matches/collapsible_match.rs index 29b935fb6..48fc5746b 100644 --- a/src/tools/clippy/clippy_lints/src/matches/collapsible_match.rs +++ b/src/tools/clippy/clippy_lints/src/matches/collapsible_match.rs @@ -5,7 +5,6 @@ use clippy_utils::visitors::is_local_used; use clippy_utils::{ is_res_lang_ctor, is_unit_expr, path_to_local, peel_blocks_with_stmt, peel_ref_operators, SpanlessEq, }; -use if_chain::if_chain; use rustc_errors::MultiSpan; use rustc_hir::LangItem::OptionNone; use rustc_hir::{Arm, Expr, Guard, HirId, Let, Pat, PatKind}; @@ -40,76 +39,73 @@ fn check_arm<'tcx>( outer_else_body: Option<&'tcx Expr<'tcx>>, ) { let inner_expr = peel_blocks_with_stmt(outer_then_body); - if_chain! { - if let Some(inner) = IfLetOrMatch::parse(cx, inner_expr); - if let Some((inner_scrutinee, inner_then_pat, inner_else_body)) = match inner { + if let Some(inner) = IfLetOrMatch::parse(cx, inner_expr) + && let Some((inner_scrutinee, inner_then_pat, inner_else_body)) = match inner { IfLetOrMatch::IfLet(scrutinee, pat, _, els) => Some((scrutinee, pat, els)), - IfLetOrMatch::Match(scrutinee, arms, ..) => if_chain! { + IfLetOrMatch::Match(scrutinee, arms, ..) => if arms.len() == 2 && arms.iter().all(|a| a.guard.is_none()) // if there are more than two arms, collapsing would be non-trivial - if arms.len() == 2 && arms.iter().all(|a| a.guard.is_none()); // one of the arms must be "wild-like" - if let Some(wild_idx) = arms.iter().rposition(|a| arm_is_wild_like(cx, a)); - then { - let (then, els) = (&arms[1 - wild_idx], &arms[wild_idx]); - Some((scrutinee, then.pat, Some(els.body))) - } else { - None - } + && let Some(wild_idx) = arms.iter().rposition(|a| arm_is_wild_like(cx, a)) + { + let (then, els) = (&arms[1 - wild_idx], &arms[wild_idx]); + Some((scrutinee, then.pat, Some(els.body))) + } else { + None }, - }; - if outer_pat.span.eq_ctxt(inner_scrutinee.span); + } + && outer_pat.span.eq_ctxt(inner_scrutinee.span) // match expression must be a local binding // match <local> { .. } - if let Some(binding_id) = path_to_local(peel_ref_operators(cx, inner_scrutinee)); - if !pat_contains_or(inner_then_pat); + && let Some(binding_id) = path_to_local(peel_ref_operators(cx, inner_scrutinee)) + && !pat_contains_or(inner_then_pat) // the binding must come from the pattern of the containing match arm // ..<local>.. => match <local> { .. } - if let (Some(binding_span), is_innermost_parent_pat_struct) - = find_pat_binding_and_is_innermost_parent_pat_struct(outer_pat, binding_id); + && let (Some(binding_span), is_innermost_parent_pat_struct) + = find_pat_binding_and_is_innermost_parent_pat_struct(outer_pat, binding_id) // the "else" branches must be equal - if match (outer_else_body, inner_else_body) { + && match (outer_else_body, inner_else_body) { (None, None) => true, (None, Some(e)) | (Some(e), None) => is_unit_expr(e), (Some(a), Some(b)) => SpanlessEq::new(cx).eq_expr(a, b), - }; + } // the binding must not be used in the if guard - if outer_guard.map_or( + && outer_guard.map_or( true, |(Guard::If(e) | Guard::IfLet(Let { init: e, .. }))| !is_local_used(cx, *e, binding_id) - ); + ) // ...or anywhere in the inner expression - if match inner { + && match inner { IfLetOrMatch::IfLet(_, _, body, els) => { !is_local_used(cx, body, binding_id) && els.map_or(true, |e| !is_local_used(cx, e, binding_id)) }, IfLetOrMatch::Match(_, arms, ..) => !arms.iter().any(|arm| is_local_used(cx, arm, binding_id)), - }; - then { - let msg = format!( - "this `{}` can be collapsed into the outer `{}`", - if matches!(inner, IfLetOrMatch::Match(..)) { "match" } else { "if let" }, - if outer_is_match { "match" } else { "if let" }, - ); - // collapsing patterns need an explicit field name in struct pattern matching - // ex: Struct {x: Some(1)} - let replace_msg = if is_innermost_parent_pat_struct { - format!(", prefixed by {}:", snippet(cx, binding_span, "their field name")) + } + { + let msg = format!( + "this `{}` can be collapsed into the outer `{}`", + if matches!(inner, IfLetOrMatch::Match(..)) { + "match" } else { - String::new() - }; - span_lint_and_then( - cx, - COLLAPSIBLE_MATCH, - inner_expr.span, - &msg, - |diag| { - let mut help_span = MultiSpan::from_spans(vec![binding_span, inner_then_pat.span]); - help_span.push_span_label(binding_span, "replace this binding"); - help_span.push_span_label(inner_then_pat.span, format!("with this pattern{replace_msg}")); - diag.span_help(help_span, "the outer pattern can be modified to include the inner pattern"); - }, + "if let" + }, + if outer_is_match { "match" } else { "if let" }, + ); + // collapsing patterns need an explicit field name in struct pattern matching + // ex: Struct {x: Some(1)} + let replace_msg = if is_innermost_parent_pat_struct { + format!(", prefixed by {}:", snippet(cx, binding_span, "their field name")) + } else { + String::new() + }; + span_lint_and_then(cx, COLLAPSIBLE_MATCH, inner_expr.span, &msg, |diag| { + let mut help_span = MultiSpan::from_spans(vec![binding_span, inner_then_pat.span]); + help_span.push_span_label(binding_span, "replace this binding"); + help_span.push_span_label(inner_then_pat.span, format!("with this pattern{replace_msg}")); + diag.span_help( + help_span, + "the outer pattern can be modified to include the inner pattern", ); - } + }); } } diff --git a/src/tools/clippy/clippy_lints/src/matches/infallible_destructuring_match.rs b/src/tools/clippy/clippy_lints/src/matches/infallible_destructuring_match.rs index 3329f93b7..c8a48246e 100644 --- a/src/tools/clippy/clippy_lints/src/matches/infallible_destructuring_match.rs +++ b/src/tools/clippy/clippy_lints/src/matches/infallible_destructuring_match.rs @@ -8,38 +8,35 @@ use rustc_lint::LateContext; use super::INFALLIBLE_DESTRUCTURING_MATCH; pub(crate) fn check(cx: &LateContext<'_>, local: &Local<'_>) -> bool { - if_chain! { - if !local.span.from_expansion(); - if let Some(expr) = local.init; - if let ExprKind::Match(target, arms, MatchSource::Normal) = expr.kind; - if arms.len() == 1 && arms[0].guard.is_none(); - if let PatKind::TupleStruct( - QPath::Resolved(None, variant_name), args, _) = arms[0].pat.kind; - if args.len() == 1; - if let PatKind::Binding(binding, arg, ..) = strip_pat_refs(&args[0]).kind; - let body = peel_blocks(arms[0].body); - if path_to_local_id(body, arg); - - then { - let mut applicability = Applicability::MachineApplicable; - span_lint_and_sugg( - cx, - INFALLIBLE_DESTRUCTURING_MATCH, - local.span, - "you seem to be trying to use `match` to destructure a single infallible pattern. \ - Consider using `let`", - "try", - format!( - "let {}({}{}) = {};", - snippet_with_applicability(cx, variant_name.span, "..", &mut applicability), - if binding.0 == ByRef::Yes { "ref " } else { "" }, - snippet_with_applicability(cx, local.pat.span, "..", &mut applicability), - snippet_with_applicability(cx, target.span, "..", &mut applicability), - ), - applicability, - ); - return true; - } + if !local.span.from_expansion() + && let Some(expr) = local.init + && let ExprKind::Match(target, arms, MatchSource::Normal) = expr.kind + && arms.len() == 1 + && arms[0].guard.is_none() + && let PatKind::TupleStruct(QPath::Resolved(None, variant_name), args, _) = arms[0].pat.kind + && args.len() == 1 + && let PatKind::Binding(binding, arg, ..) = strip_pat_refs(&args[0]).kind + && let body = peel_blocks(arms[0].body) + && path_to_local_id(body, arg) + { + let mut applicability = Applicability::MachineApplicable; + span_lint_and_sugg( + cx, + INFALLIBLE_DESTRUCTURING_MATCH, + local.span, + "you seem to be trying to use `match` to destructure a single infallible pattern. \ + Consider using `let`", + "try", + format!( + "let {}({}{}) = {};", + snippet_with_applicability(cx, variant_name.span, "..", &mut applicability), + if binding.0 == ByRef::Yes { "ref " } else { "" }, + snippet_with_applicability(cx, local.pat.span, "..", &mut applicability), + snippet_with_applicability(cx, target.span, "..", &mut applicability), + ), + applicability, + ); + return true; } false } diff --git a/src/tools/clippy/clippy_lints/src/matches/manual_filter.rs b/src/tools/clippy/clippy_lints/src/matches/manual_filter.rs index cdb51c33a..619ec8312 100644 --- a/src/tools/clippy/clippy_lints/src/matches/manual_filter.rs +++ b/src/tools/clippy/clippy_lints/src/matches/manual_filter.rs @@ -21,19 +21,19 @@ fn get_cond_expr<'tcx>( expr: &'tcx Expr<'_>, ctxt: SyntaxContext, ) -> Option<SomeExpr<'tcx>> { - if_chain! { - if let Some(block_expr) = peels_blocks_incl_unsafe_opt(expr); - if let ExprKind::If(cond, then_expr, Some(else_expr)) = block_expr.kind; - if let PatKind::Binding(_,target, ..) = pat.kind; - if is_some_expr(cx, target, ctxt, then_expr) && is_none_expr(cx, else_expr) - || is_none_expr(cx, then_expr) && is_some_expr(cx, target, ctxt, else_expr); // check that one expr resolves to `Some(x)`, the other to `None` - then { - return Some(SomeExpr { - expr: peels_blocks_incl_unsafe(cond.peel_drop_temps()), - needs_unsafe_block: contains_unsafe_block(cx, expr), - needs_negated: is_none_expr(cx, then_expr) // if the `then_expr` resolves to `None`, need to negate the cond - }) - } + if let Some(block_expr) = peels_blocks_incl_unsafe_opt(expr) + && let ExprKind::If(cond, then_expr, Some(else_expr)) = block_expr.kind + && let PatKind::Binding(_, target, ..) = pat.kind + && (is_some_expr(cx, target, ctxt, then_expr) && is_none_expr(cx, else_expr) + || is_none_expr(cx, then_expr) && is_some_expr(cx, target, ctxt, else_expr)) + // check that one expr resolves to `Some(x)`, the other to `None` + { + return Some(SomeExpr { + expr: peels_blocks_incl_unsafe(cond.peel_drop_temps()), + needs_unsafe_block: contains_unsafe_block(cx, expr), + needs_negated: is_none_expr(cx, then_expr), /* if the `then_expr` resolves to `None`, need to negate the + * cond */ + }); }; None } diff --git a/src/tools/clippy/clippy_lints/src/matches/manual_unwrap_or.rs b/src/tools/clippy/clippy_lints/src/matches/manual_unwrap_or.rs index b94501bf0..3e79cabd7 100644 --- a/src/tools/clippy/clippy_lints/src/matches/manual_unwrap_or.rs +++ b/src/tools/clippy/clippy_lints/src/matches/manual_unwrap_or.rs @@ -4,7 +4,6 @@ use clippy_utils::source::{indent_of, reindent_multiline, snippet_opt}; use clippy_utils::ty::is_type_diagnostic_item; use clippy_utils::usage::contains_return_break_continue_macro; use clippy_utils::{is_res_lang_ctor, path_to_local_id, sugg}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::def::{DefKind, Res}; use rustc_hir::LangItem::{OptionNone, ResultErr}; @@ -16,65 +15,57 @@ use super::MANUAL_UNWRAP_OR; pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, expr: &Expr<'tcx>, scrutinee: &'tcx Expr<'_>, arms: &'tcx [Arm<'_>]) { let ty = cx.typeck_results().expr_ty(scrutinee); - if_chain! { - if let Some(ty_name) = if is_type_diagnostic_item(cx, ty, sym::Option) { - Some("Option") - } else if is_type_diagnostic_item(cx, ty, sym::Result) { - Some("Result") - } else { - None - }; - if let Some(or_arm) = applicable_or_arm(cx, arms); - if let Some(or_body_snippet) = snippet_opt(cx, or_arm.body.span); - if let Some(indent) = indent_of(cx, expr.span); - if constant_simple(cx, cx.typeck_results(), or_arm.body).is_some(); - then { - let reindented_or_body = - reindent_multiline(or_body_snippet.into(), true, Some(indent)); + if let Some(ty_name) = if is_type_diagnostic_item(cx, ty, sym::Option) { + Some("Option") + } else if is_type_diagnostic_item(cx, ty, sym::Result) { + Some("Result") + } else { + None + } && let Some(or_arm) = applicable_or_arm(cx, arms) + && let Some(or_body_snippet) = snippet_opt(cx, or_arm.body.span) + && let Some(indent) = indent_of(cx, expr.span) + && constant_simple(cx, cx.typeck_results(), or_arm.body).is_some() + { + let reindented_or_body = reindent_multiline(or_body_snippet.into(), true, Some(indent)); - let mut app = Applicability::MachineApplicable; - let suggestion = sugg::Sugg::hir_with_context(cx, scrutinee, expr.span.ctxt(), "..", &mut app).maybe_par(); - span_lint_and_sugg( - cx, - MANUAL_UNWRAP_OR, expr.span, - &format!("this pattern reimplements `{ty_name}::unwrap_or`"), - "replace with", - format!( - "{suggestion}.unwrap_or({reindented_or_body})", - ), - app, - ); - } + let mut app = Applicability::MachineApplicable; + let suggestion = sugg::Sugg::hir_with_context(cx, scrutinee, expr.span.ctxt(), "..", &mut app).maybe_par(); + span_lint_and_sugg( + cx, + MANUAL_UNWRAP_OR, + expr.span, + &format!("this pattern reimplements `{ty_name}::unwrap_or`"), + "replace with", + format!("{suggestion}.unwrap_or({reindented_or_body})",), + app, + ); } } fn applicable_or_arm<'a>(cx: &LateContext<'_>, arms: &'a [Arm<'a>]) -> Option<&'a Arm<'a>> { - if_chain! { - if arms.len() == 2; - if arms.iter().all(|arm| arm.guard.is_none()); - if let Some((idx, or_arm)) = arms.iter().enumerate().find(|(_, arm)| { - match arm.pat.kind { - PatKind::Path(ref qpath) => is_res_lang_ctor(cx, cx.qpath_res(qpath, arm.pat.hir_id), OptionNone), - PatKind::TupleStruct(ref qpath, [pat], _) => - matches!(pat.kind, PatKind::Wild) - && is_res_lang_ctor(cx, cx.qpath_res(qpath, arm.pat.hir_id), ResultErr), - _ => false, - } - }); - let unwrap_arm = &arms[1 - idx]; - if let PatKind::TupleStruct(ref qpath, [unwrap_pat], _) = unwrap_arm.pat.kind; - if let Res::Def(DefKind::Ctor(..), ctor_id) = cx.qpath_res(qpath, unwrap_arm.pat.hir_id); - if let Some(variant_id) = cx.tcx.opt_parent(ctor_id); - if cx.tcx.lang_items().option_some_variant() == Some(variant_id) - || cx.tcx.lang_items().result_ok_variant() == Some(variant_id); - if let PatKind::Binding(_, binding_hir_id, ..) = unwrap_pat.kind; - if path_to_local_id(unwrap_arm.body, binding_hir_id); - if cx.typeck_results().expr_adjustments(unwrap_arm.body).is_empty(); - if !contains_return_break_continue_macro(or_arm.body); - then { - Some(or_arm) - } else { - None - } + if arms.len() == 2 + && arms.iter().all(|arm| arm.guard.is_none()) + && let Some((idx, or_arm)) = arms.iter().enumerate().find(|(_, arm)| match arm.pat.kind { + PatKind::Path(ref qpath) => is_res_lang_ctor(cx, cx.qpath_res(qpath, arm.pat.hir_id), OptionNone), + PatKind::TupleStruct(ref qpath, [pat], _) => { + matches!(pat.kind, PatKind::Wild) + && is_res_lang_ctor(cx, cx.qpath_res(qpath, arm.pat.hir_id), ResultErr) + }, + _ => false, + }) + && let unwrap_arm = &arms[1 - idx] + && let PatKind::TupleStruct(ref qpath, [unwrap_pat], _) = unwrap_arm.pat.kind + && let Res::Def(DefKind::Ctor(..), ctor_id) = cx.qpath_res(qpath, unwrap_arm.pat.hir_id) + && let Some(variant_id) = cx.tcx.opt_parent(ctor_id) + && (cx.tcx.lang_items().option_some_variant() == Some(variant_id) + || cx.tcx.lang_items().result_ok_variant() == Some(variant_id)) + && let PatKind::Binding(_, binding_hir_id, ..) = unwrap_pat.kind + && path_to_local_id(unwrap_arm.body, binding_hir_id) + && cx.typeck_results().expr_adjustments(unwrap_arm.body).is_empty() + && !contains_return_break_continue_macro(or_arm.body) + { + Some(or_arm) + } else { + None } } diff --git a/src/tools/clippy/clippy_lints/src/matches/manual_utils.rs b/src/tools/clippy/clippy_lints/src/matches/manual_utils.rs index 781ee138c..0627e458d 100644 --- a/src/tools/clippy/clippy_lints/src/matches/manual_utils.rs +++ b/src/tools/clippy/clippy_lints/src/matches/manual_utils.rs @@ -127,32 +127,30 @@ where let closure_expr_snip = some_expr.to_snippet_with_context(cx, expr_ctxt, &mut app); let body_str = if let PatKind::Binding(annotation, id, some_binding, None) = some_pat.kind { - if_chain! { - if !some_expr.needs_unsafe_block; - if let Some(func) = can_pass_as_func(cx, id, some_expr.expr); - if func.span.eq_ctxt(some_expr.expr.span); - then { - snippet_with_applicability(cx, func.span, "..", &mut app).into_owned() - } else { - if path_to_local_id(some_expr.expr, id) - && !is_lint_allowed(cx, MATCH_AS_REF, expr.hir_id) - && binding_ref.is_some() - { - return None; - } + if !some_expr.needs_unsafe_block + && let Some(func) = can_pass_as_func(cx, id, some_expr.expr) + && func.span.eq_ctxt(some_expr.expr.span) + { + snippet_with_applicability(cx, func.span, "..", &mut app).into_owned() + } else { + if path_to_local_id(some_expr.expr, id) + && !is_lint_allowed(cx, MATCH_AS_REF, expr.hir_id) + && binding_ref.is_some() + { + return None; + } - // `ref` and `ref mut` annotations were handled earlier. - let annotation = if matches!(annotation, BindingAnnotation::MUT) { - "mut " - } else { - "" - }; + // `ref` and `ref mut` annotations were handled earlier. + let annotation = if matches!(annotation, BindingAnnotation::MUT) { + "mut " + } else { + "" + }; - if some_expr.needs_unsafe_block { - format!("|{annotation}{some_binding}| unsafe {{ {closure_expr_snip} }}") - } else { - format!("|{annotation}{some_binding}| {closure_expr_snip}") - } + if some_expr.needs_unsafe_block { + format!("|{annotation}{some_binding}| unsafe {{ {closure_expr_snip} }}") + } else { + format!("|{annotation}{some_binding}| {closure_expr_snip}") } } } else if !is_wild_none && explicit_ref.is_none() { diff --git a/src/tools/clippy/clippy_lints/src/matches/match_as_ref.rs b/src/tools/clippy/clippy_lints/src/matches/match_as_ref.rs index d51cca040..3f737da92 100644 --- a/src/tools/clippy/clippy_lints/src/matches/match_as_ref.rs +++ b/src/tools/clippy/clippy_lints/src/matches/match_as_ref.rs @@ -26,18 +26,16 @@ pub(crate) fn check(cx: &LateContext<'_>, ex: &Expr<'_>, arms: &[Arm<'_>], expr: let output_ty = cx.typeck_results().expr_ty(expr); let input_ty = cx.typeck_results().expr_ty(ex); - let cast = if_chain! { - if let ty::Adt(_, args) = input_ty.kind(); - let input_ty = args.type_at(0); - if let ty::Adt(_, args) = output_ty.kind(); - let output_ty = args.type_at(0); - if let ty::Ref(_, output_ty, _) = *output_ty.kind(); - if input_ty != output_ty; - then { - ".map(|x| x as _)" - } else { - "" - } + let cast = if let ty::Adt(_, args) = input_ty.kind() + && let input_ty = args.type_at(0) + && let ty::Adt(_, args) = output_ty.kind() + && let output_ty = args.type_at(0) + && let ty::Ref(_, output_ty, _) = *output_ty.kind() + && input_ty != output_ty + { + ".map(|x| x as _)" + } else { + "" }; let mut applicability = Applicability::MachineApplicable; @@ -67,17 +65,16 @@ fn is_none_arm(cx: &LateContext<'_>, arm: &Arm<'_>) -> bool { // Checks if arm has the form `Some(ref v) => Some(v)` (checks for `ref` and `ref mut`) fn is_ref_some_arm(cx: &LateContext<'_>, arm: &Arm<'_>) -> Option<Mutability> { - if_chain! { - if let PatKind::TupleStruct(ref qpath, [first_pat, ..], _) = arm.pat.kind; - if is_res_lang_ctor(cx, cx.qpath_res(qpath, arm.pat.hir_id), LangItem::OptionSome); - if let PatKind::Binding(BindingAnnotation(ByRef::Yes, mutabl), .., ident, _) = first_pat.kind; - if let ExprKind::Call(e, [arg]) = peel_blocks(arm.body).kind; - if is_res_lang_ctor(cx, path_res(cx, e), LangItem::OptionSome); - if let ExprKind::Path(QPath::Resolved(_, path2)) = arg.kind; - if path2.segments.len() == 1 && ident.name == path2.segments[0].ident.name; - then { - return Some(mutabl) - } + if let PatKind::TupleStruct(ref qpath, [first_pat, ..], _) = arm.pat.kind + && is_res_lang_ctor(cx, cx.qpath_res(qpath, arm.pat.hir_id), LangItem::OptionSome) + && let PatKind::Binding(BindingAnnotation(ByRef::Yes, mutabl), .., ident, _) = first_pat.kind + && let ExprKind::Call(e, [arg]) = peel_blocks(arm.body).kind + && is_res_lang_ctor(cx, path_res(cx, e), LangItem::OptionSome) + && let ExprKind::Path(QPath::Resolved(_, path2)) = arg.kind + && path2.segments.len() == 1 + && ident.name == path2.segments[0].ident.name + { + return Some(mutabl); } None } diff --git a/src/tools/clippy/clippy_lints/src/matches/match_like_matches.rs b/src/tools/clippy/clippy_lints/src/matches/match_like_matches.rs index e2ddf11ab..56123326f 100644 --- a/src/tools/clippy/clippy_lints/src/matches/match_like_matches.rs +++ b/src/tools/clippy/clippy_lints/src/matches/match_like_matches.rs @@ -76,79 +76,80 @@ where ), >, { - if_chain! { - if !span_contains_comment(cx.sess().source_map(), expr.span); - if iter.len() >= 2; - if cx.typeck_results().expr_ty(expr).is_bool(); - if let Some((_, last_pat_opt, last_expr, _)) = iter.next_back(); - let iter_without_last = iter.clone(); - if let Some((first_attrs, _, first_expr, first_guard)) = iter.next(); - if let Some(b0) = find_bool_lit(&first_expr.kind); - if let Some(b1) = find_bool_lit(&last_expr.kind); - if b0 != b1; - if first_guard.is_none() || iter.len() == 0; - if first_attrs.is_empty(); - if iter - .all(|arm| { - find_bool_lit(&arm.2.kind).map_or(false, |b| b == b0) && arm.3.is_none() && arm.0.is_empty() - }); - then { - if let Some(last_pat) = last_pat_opt { - if !is_wild(last_pat) { - return false; - } + if !span_contains_comment(cx.sess().source_map(), expr.span) + && iter.len() >= 2 + && cx.typeck_results().expr_ty(expr).is_bool() + && let Some((_, last_pat_opt, last_expr, _)) = iter.next_back() + && let iter_without_last = iter.clone() + && let Some((first_attrs, _, first_expr, first_guard)) = iter.next() + && let Some(b0) = find_bool_lit(&first_expr.kind) + && let Some(b1) = find_bool_lit(&last_expr.kind) + && b0 != b1 + && (first_guard.is_none() || iter.len() == 0) + && first_attrs.is_empty() + && iter.all(|arm| find_bool_lit(&arm.2.kind).map_or(false, |b| b == b0) && arm.3.is_none() && arm.0.is_empty()) + { + if let Some(last_pat) = last_pat_opt { + if !is_wild(last_pat) { + return false; } + } - for arm in iter_without_last.clone() { - if let Some(pat) = arm.1 { - if !is_lint_allowed(cx, REDUNDANT_PATTERN_MATCHING, pat.hir_id) && is_some(pat.kind) { - return false; - } + for arm in iter_without_last.clone() { + if let Some(pat) = arm.1 { + if !is_lint_allowed(cx, REDUNDANT_PATTERN_MATCHING, pat.hir_id) && is_some(pat.kind) { + return false; } } + } - // The suggestion may be incorrect, because some arms can have `cfg` attributes - // evaluated into `false` and so such arms will be stripped before. - let mut applicability = Applicability::MaybeIncorrect; - let pat = { - use itertools::Itertools as _; - iter_without_last - .filter_map(|arm| { - let pat_span = arm.1?.span; - Some(snippet_with_applicability(cx, pat_span, "..", &mut applicability)) - }) - .join(" | ") - }; - let pat_and_guard = if let Some(Guard::If(g)) = first_guard { - format!("{pat} if {}", snippet_with_applicability(cx, g.span, "..", &mut applicability)) - } else { - pat - }; - - // strip potential borrows (#6503), but only if the type is a reference - let mut ex_new = ex; - if let ExprKind::AddrOf(BorrowKind::Ref, .., ex_inner) = ex.kind { - if let ty::Ref(..) = cx.typeck_results().expr_ty(ex_inner).kind() { - ex_new = ex_inner; - } - }; - span_lint_and_sugg( - cx, - MATCH_LIKE_MATCHES_MACRO, - expr.span, - &format!("{} expression looks like `matches!` macro", if is_if_let { "if let .. else" } else { "match" }), - "try", - format!( - "{}matches!({}, {pat_and_guard})", - if b0 { "" } else { "!" }, - snippet_with_applicability(cx, ex_new.span, "..", &mut applicability), - ), - applicability, - ); - true + // The suggestion may be incorrect, because some arms can have `cfg` attributes + // evaluated into `false` and so such arms will be stripped before. + let mut applicability = Applicability::MaybeIncorrect; + let pat = { + use itertools::Itertools as _; + iter_without_last + .filter_map(|arm| { + let pat_span = arm.1?.span; + Some(snippet_with_applicability(cx, pat_span, "..", &mut applicability)) + }) + .join(" | ") + }; + let pat_and_guard = if let Some(Guard::If(g)) = first_guard { + format!( + "{pat} if {}", + snippet_with_applicability(cx, g.span, "..", &mut applicability) + ) } else { - false - } + pat + }; + + // strip potential borrows (#6503), but only if the type is a reference + let mut ex_new = ex; + if let ExprKind::AddrOf(BorrowKind::Ref, .., ex_inner) = ex.kind { + if let ty::Ref(..) = cx.typeck_results().expr_ty(ex_inner).kind() { + ex_new = ex_inner; + } + }; + span_lint_and_sugg( + cx, + MATCH_LIKE_MATCHES_MACRO, + expr.span, + &format!( + "{} expression looks like `matches!` macro", + if is_if_let { "if let .. else" } else { "match" } + ), + "try", + format!( + "{}matches!({}, {pat_and_guard})", + if b0 { "" } else { "!" }, + snippet_with_applicability(cx, ex_new.span, "..", &mut applicability), + ), + applicability, + ); + true + } else { + false } } diff --git a/src/tools/clippy/clippy_lints/src/matches/match_on_vec_items.rs b/src/tools/clippy/clippy_lints/src/matches/match_on_vec_items.rs index bd53ebd48..dd71560e1 100644 --- a/src/tools/clippy/clippy_lints/src/matches/match_on_vec_items.rs +++ b/src/tools/clippy/clippy_lints/src/matches/match_on_vec_items.rs @@ -1,7 +1,6 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet; use clippy_utils::ty::{is_type_diagnostic_item, is_type_lang_item}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind, LangItem}; use rustc_lint::LateContext; @@ -10,39 +9,29 @@ use rustc_span::sym; use super::MATCH_ON_VEC_ITEMS; pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, scrutinee: &'tcx Expr<'_>) { - if_chain! { - if let Some(idx_expr) = is_vec_indexing(cx, scrutinee); - if let ExprKind::Index(vec, idx, _) = idx_expr.kind; - - then { - // FIXME: could be improved to suggest surrounding every pattern with Some(_), - // but only when `or_patterns` are stabilized. - span_lint_and_sugg( - cx, - MATCH_ON_VEC_ITEMS, - scrutinee.span, - "indexing into a vector may panic", - "try", - format!( - "{}.get({})", - snippet(cx, vec.span, ".."), - snippet(cx, idx.span, "..") - ), - Applicability::MaybeIncorrect - ); - } + if let Some(idx_expr) = is_vec_indexing(cx, scrutinee) + && let ExprKind::Index(vec, idx, _) = idx_expr.kind + { + // FIXME: could be improved to suggest surrounding every pattern with Some(_), + // but only when `or_patterns` are stabilized. + span_lint_and_sugg( + cx, + MATCH_ON_VEC_ITEMS, + scrutinee.span, + "indexing into a vector may panic", + "try", + format!("{}.get({})", snippet(cx, vec.span, ".."), snippet(cx, idx.span, "..")), + Applicability::MaybeIncorrect, + ); } } fn is_vec_indexing<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) -> Option<&'tcx Expr<'tcx>> { - if_chain! { - if let ExprKind::Index(array, index, _) = expr.kind; - if is_vector(cx, array); - if !is_full_range(cx, index); - - then { - return Some(expr); - } + if let ExprKind::Index(array, index, _) = expr.kind + && is_vector(cx, array) + && !is_full_range(cx, index) + { + return Some(expr); } None diff --git a/src/tools/clippy/clippy_lints/src/matches/match_same_arms.rs b/src/tools/clippy/clippy_lints/src/matches/match_same_arms.rs index 6fc79fadd..c823d07e2 100644 --- a/src/tools/clippy/clippy_lints/src/matches/match_same_arms.rs +++ b/src/tools/clippy/clippy_lints/src/matches/match_same_arms.rs @@ -1,4 +1,4 @@ -use clippy_utils::diagnostics::span_lint_and_then; +use clippy_utils::diagnostics::span_lint_hir_and_then; use clippy_utils::source::snippet; use clippy_utils::{is_lint_allowed, path_to_local, search_same, SpanlessEq, SpanlessHash}; use core::cmp::Ordering; @@ -66,25 +66,23 @@ pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, arms: &'tcx [Arm<'_>]) { let mut local_map: HirIdMap<HirId> = HirIdMap::default(); let eq_fallback = |a: &Expr<'_>, b: &Expr<'_>| { - if_chain! { - if let Some(a_id) = path_to_local(a); - if let Some(b_id) = path_to_local(b); - let entry = match local_map.entry(a_id) { + if let Some(a_id) = path_to_local(a) + && let Some(b_id) = path_to_local(b) + && let entry = match local_map.entry(a_id) { HirIdMapEntry::Vacant(entry) => entry, // check if using the same bindings as before HirIdMapEntry::Occupied(entry) => return *entry.get() == b_id, - }; - // the names technically don't have to match; this makes the lint more conservative - if cx.tcx.hir().name(a_id) == cx.tcx.hir().name(b_id); - if cx.typeck_results().expr_ty(a) == cx.typeck_results().expr_ty(b); - if pat_contains_local(lhs.pat, a_id); - if pat_contains_local(rhs.pat, b_id); - then { - entry.insert(b_id); - true - } else { - false } + // the names technically don't have to match; this makes the lint more conservative + && cx.tcx.hir().name(a_id) == cx.tcx.hir().name(b_id) + && cx.typeck_results().expr_ty(a) == cx.typeck_results().expr_ty(b) + && pat_contains_local(lhs.pat, a_id) + && pat_contains_local(rhs.pat, b_id) + { + entry.insert(b_id); + true + } else { + false } }; // Arms with a guard are ignored, those can’t always be merged together @@ -106,9 +104,10 @@ pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, arms: &'tcx [Arm<'_>]) { if !cx.tcx.features().non_exhaustive_omitted_patterns_lint || is_lint_allowed(cx, NON_EXHAUSTIVE_OMITTED_PATTERNS, arm2.hir_id) { - span_lint_and_then( + span_lint_hir_and_then( cx, MATCH_SAME_ARMS, + arm1.hir_id, arm1.span, "this match arm has an identical body to the `_` wildcard arm", |diag| { @@ -126,9 +125,10 @@ pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, arms: &'tcx [Arm<'_>]) { (arm2, arm1) }; - span_lint_and_then( + span_lint_hir_and_then( cx, MATCH_SAME_ARMS, + keep_arm.hir_id, keep_arm.span, "this match arm has an identical body to another arm", |diag| { @@ -152,6 +152,7 @@ pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, arms: &'tcx [Arm<'_>]) { #[derive(Clone, Copy)] enum NormalizedPat<'a> { Wild, + Never, Struct(Option<DefId>, &'a [(Symbol, Self)]), Tuple(Option<DefId>, &'a [Self]), Or(&'a [Self]), @@ -223,7 +224,7 @@ fn iter_matching_struct_fields<'a>( Iter(left.iter(), right.iter()) } -#[expect(clippy::similar_names)] +#[expect(clippy::similar_names, clippy::too_many_lines)] impl<'a> NormalizedPat<'a> { fn from_pat(cx: &LateContext<'_>, arena: &'a DroplessArena, pat: &'a Pat<'_>) -> Self { match pat.kind { @@ -231,6 +232,7 @@ impl<'a> NormalizedPat<'a> { PatKind::Binding(.., Some(pat)) | PatKind::Box(pat) | PatKind::Ref(pat, _) => { Self::from_pat(cx, arena, pat) }, + PatKind::Never => Self::Never, PatKind::Struct(ref path, fields, _) => { let fields = arena.alloc_from_iter(fields.iter().map(|f| (f.ident.name, Self::from_pat(cx, arena, f.pat)))); @@ -334,7 +336,7 @@ impl<'a> NormalizedPat<'a> { /// type. fn has_overlapping_values(&self, other: &Self) -> bool { match (*self, *other) { - (Self::Wild, _) | (_, Self::Wild) => true, + (Self::Wild, _) | (_, Self::Wild) | (Self::Never, Self::Never) => true, (Self::Or(pats), ref other) | (ref other, Self::Or(pats)) => { pats.iter().any(|pat| pat.has_overlapping_values(other)) }, diff --git a/src/tools/clippy/clippy_lints/src/matches/match_str_case_mismatch.rs b/src/tools/clippy/clippy_lints/src/matches/match_str_case_mismatch.rs index 675a85ae5..bd38648bc 100644 --- a/src/tools/clippy/clippy_lints/src/matches/match_str_case_mismatch.rs +++ b/src/tools/clippy/clippy_lints/src/matches/match_str_case_mismatch.rs @@ -20,21 +20,16 @@ enum CaseMethod { } pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, scrutinee: &'tcx Expr<'_>, arms: &'tcx [Arm<'_>]) { - if_chain! { - if let ty::Ref(_, ty, _) = cx.typeck_results().expr_ty(scrutinee).kind(); - if let ty::Str = ty.kind(); - then { - let mut visitor = MatchExprVisitor { - cx, - case_method: None, - }; - - visitor.visit_expr(scrutinee); - - if let Some(case_method) = visitor.case_method { - if let Some((bad_case_span, bad_case_sym)) = verify_case(&case_method, arms) { - lint(cx, &case_method, bad_case_span, bad_case_sym.as_str()); - } + if let ty::Ref(_, ty, _) = cx.typeck_results().expr_ty(scrutinee).kind() + && let ty::Str = ty.kind() + { + let mut visitor = MatchExprVisitor { cx, case_method: None }; + + visitor.visit_expr(scrutinee); + + if let Some(case_method) = visitor.case_method { + if let Some((bad_case_span, bad_case_sym)) = verify_case(&case_method, arms) { + lint(cx, &case_method, bad_case_span, bad_case_sym.as_str()); } } } @@ -88,17 +83,15 @@ fn verify_case<'a>(case_method: &'a CaseMethod, arms: &'a [Arm<'_>]) -> Option<( }; for arm in arms { - if_chain! { - if let PatKind::Lit(Expr { - kind: ExprKind::Lit(lit), - .. - }) = arm.pat.kind; - if let LitKind::Str(symbol, _) = lit.node; - let input = symbol.as_str(); - if !case_check(input); - then { - return Some((lit.span, symbol)); - } + if let PatKind::Lit(Expr { + kind: ExprKind::Lit(lit), + .. + }) = arm.pat.kind + && let LitKind::Str(symbol, _) = lit.node + && let input = symbol.as_str() + && !case_check(input) + { + return Some((lit.span, symbol)); } } diff --git a/src/tools/clippy/clippy_lints/src/matches/match_wild_err_arm.rs b/src/tools/clippy/clippy_lints/src/matches/match_wild_err_arm.rs index a2903e52a..8a4c0ab90 100644 --- a/src/tools/clippy/clippy_lints/src/matches/match_wild_err_arm.rs +++ b/src/tools/clippy/clippy_lints/src/matches/match_wild_err_arm.rs @@ -34,20 +34,19 @@ pub(crate) fn check<'tcx>(cx: &LateContext<'tcx>, ex: &Expr<'tcx>, arms: &[Arm<' } } } - if_chain! { - if matching_wild; - if let Some(macro_call) = root_macro_call(peel_blocks_with_stmt(arm.body).span); - if is_panic(cx, macro_call.def_id); - then { - // `Err(_)` or `Err(_e)` arm with `panic!` found - span_lint_and_note(cx, - MATCH_WILD_ERR_ARM, - arm.pat.span, - &format!("`Err({ident_bind_name})` matches all errors"), - None, - "match each error separately or use the error output, or use `.expect(msg)` if the error case is unreachable", - ); - } + if matching_wild + && let Some(macro_call) = root_macro_call(peel_blocks_with_stmt(arm.body).span) + && is_panic(cx, macro_call.def_id) + { + // `Err(_)` or `Err(_e)` arm with `panic!` found + span_lint_and_note( + cx, + MATCH_WILD_ERR_ARM, + arm.pat.span, + &format!("`Err({ident_bind_name})` matches all errors"), + None, + "match each error separately or use the error output, or use `.expect(msg)` if the error case is unreachable", + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/matches/mod.rs b/src/tools/clippy/clippy_lints/src/matches/mod.rs index dea46d4d3..4c7568f39 100644 --- a/src/tools/clippy/clippy_lints/src/matches/mod.rs +++ b/src/tools/clippy/clippy_lints/src/matches/mod.rs @@ -31,7 +31,7 @@ use rustc_hir::{Arm, Expr, ExprKind, Local, MatchSource, Pat}; use rustc_lexer::TokenKind; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::{Span, SpanData, SyntaxContext}; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/matches/overlapping_arms.rs b/src/tools/clippy/clippy_lints/src/matches/overlapping_arms.rs index 8f0083f81..8199366d1 100644 --- a/src/tools/clippy/clippy_lints/src/matches/overlapping_arms.rs +++ b/src/tools/clippy/clippy_lints/src/matches/overlapping_arms.rs @@ -150,7 +150,7 @@ where #[test] fn test_overlapping() { - use rustc_span::source_map::DUMMY_SP; + use rustc_span::DUMMY_SP; let sp = |s, e| SpannedRange { span: DUMMY_SP, diff --git a/src/tools/clippy/clippy_lints/src/matches/redundant_guards.rs b/src/tools/clippy/clippy_lints/src/matches/redundant_guards.rs index 4a44d596a..f57b22374 100644 --- a/src/tools/clippy/clippy_lints/src/matches/redundant_guards.rs +++ b/src/tools/clippy/clippy_lints/src/matches/redundant_guards.rs @@ -1,6 +1,6 @@ use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::path_to_local; -use clippy_utils::source::snippet_with_applicability; +use clippy_utils::source::snippet; use clippy_utils::visitors::{for_each_expr, is_local_used}; use rustc_ast::{BorrowKind, LitKind}; use rustc_errors::Applicability; @@ -8,7 +8,8 @@ use rustc_hir::def::{DefKind, Res}; use rustc_hir::{Arm, BinOpKind, Expr, ExprKind, Guard, MatchSource, Node, Pat, PatKind}; use rustc_lint::LateContext; use rustc_span::symbol::Ident; -use rustc_span::Span; +use rustc_span::{Span, Symbol}; +use std::borrow::Cow; use std::ops::ControlFlow; use super::REDUNDANT_GUARDS; @@ -41,7 +42,14 @@ pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, arms: &'tcx [Arm<'tcx>]) { (PatKind::Ref(..), None) | (_, Some(_)) => continue, _ => arm.pat.span, }; - emit_redundant_guards(cx, outer_arm, if_expr.span, pat_span, &binding, arm.guard); + emit_redundant_guards( + cx, + outer_arm, + if_expr.span, + snippet(cx, pat_span, "<binding>"), + &binding, + arm.guard, + ); } // `Some(x) if let Some(2) = x` else if let Guard::IfLet(let_expr) = guard @@ -52,7 +60,14 @@ pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, arms: &'tcx [Arm<'tcx>]) { (PatKind::Ref(..), None) | (_, Some(_)) => continue, _ => let_expr.pat.span, }; - emit_redundant_guards(cx, outer_arm, let_expr.span, pat_span, &binding, None); + emit_redundant_guards( + cx, + outer_arm, + let_expr.span, + snippet(cx, pat_span, "<binding>"), + &binding, + None, + ); } // `Some(x) if x == Some(2)` // `Some(x) if Some(2) == x` @@ -78,11 +93,76 @@ pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, arms: &'tcx [Arm<'tcx>]) { (ExprKind::AddrOf(..), None) | (_, Some(_)) => continue, _ => pat.span, }; - emit_redundant_guards(cx, outer_arm, if_expr.span, pat_span, &binding, None); + emit_redundant_guards( + cx, + outer_arm, + if_expr.span, + snippet(cx, pat_span, "<binding>"), + &binding, + None, + ); + } else if let Guard::If(if_expr) = guard + && let ExprKind::MethodCall(path, recv, args, ..) = if_expr.kind + && let Some(binding) = get_pat_binding(cx, recv, outer_arm) + { + check_method_calls(cx, outer_arm, path.ident.name, recv, args, if_expr, &binding); } } } +fn check_method_calls<'tcx>( + cx: &LateContext<'tcx>, + arm: &Arm<'tcx>, + method: Symbol, + recv: &Expr<'_>, + args: &[Expr<'_>], + if_expr: &Expr<'_>, + binding: &PatBindingInfo, +) { + let ty = cx.typeck_results().expr_ty(recv).peel_refs(); + let slice_like = ty.is_slice() || ty.is_array(); + + let sugg = if method == sym!(is_empty) { + // `s if s.is_empty()` becomes "" + // `arr if arr.is_empty()` becomes [] + + if ty.is_str() { + r#""""#.into() + } else if slice_like { + "[]".into() + } else { + return; + } + } else if slice_like + && let Some(needle) = args.first() + && let ExprKind::AddrOf(.., needle) = needle.kind + && let ExprKind::Array(needles) = needle.kind + && needles.iter().all(|needle| expr_can_be_pat(cx, needle)) + { + // `arr if arr.starts_with(&[123])` becomes [123, ..] + // `arr if arr.ends_with(&[123])` becomes [.., 123] + // `arr if arr.starts_with(&[])` becomes [..] (why would anyone write this?) + + let mut sugg = snippet(cx, needle.span, "<needle>").into_owned(); + + if needles.is_empty() { + sugg.insert_str(1, ".."); + } else if method == sym!(starts_with) { + sugg.insert_str(sugg.len() - 1, ", .."); + } else if method == sym!(ends_with) { + sugg.insert_str(1, ".., "); + } else { + return; + } + + sugg.into() + } else { + return; + }; + + emit_redundant_guards(cx, arm, if_expr.span, sugg, binding, None); +} + struct PatBindingInfo { span: Span, byref_ident: Option<Ident>, @@ -134,19 +214,16 @@ fn emit_redundant_guards<'tcx>( cx: &LateContext<'tcx>, outer_arm: &Arm<'tcx>, guard_span: Span, - pat_span: Span, + binding_replacement: Cow<'static, str>, pat_binding: &PatBindingInfo, inner_guard: Option<Guard<'_>>, ) { - let mut app = Applicability::MaybeIncorrect; - span_lint_and_then( cx, REDUNDANT_GUARDS, guard_span.source_callsite(), "redundant guard", |diag| { - let binding_replacement = snippet_with_applicability(cx, pat_span, "<binding_repl>", &mut app); let suggestion_span = match *pat_binding { PatBindingInfo { span, @@ -170,14 +247,11 @@ fn emit_redundant_guards<'tcx>( Guard::IfLet(l) => ("if let", l.span), }; - format!( - " {prefix} {}", - snippet_with_applicability(cx, span, "<guard>", &mut app), - ) + format!(" {prefix} {}", snippet(cx, span, "<guard>")) }), ), ], - app, + Applicability::MaybeIncorrect, ); }, ); diff --git a/src/tools/clippy/clippy_lints/src/matches/redundant_pattern_match.rs b/src/tools/clippy/clippy_lints/src/matches/redundant_pattern_match.rs index 9a7c00823..2582f7edc 100644 --- a/src/tools/clippy/clippy_lints/src/matches/redundant_pattern_match.rs +++ b/src/tools/clippy/clippy_lints/src/matches/redundant_pattern_match.rs @@ -5,7 +5,6 @@ use clippy_utils::sugg::Sugg; use clippy_utils::ty::{is_type_diagnostic_item, needs_ordered_drop}; use clippy_utils::visitors::{any_temporaries_need_ordered_drop, for_each_expr}; use clippy_utils::{higher, is_expn_of, is_trait_method}; -use if_chain::if_chain; use rustc_ast::ast::LitKind; use rustc_errors::Applicability; use rustc_hir::def::{DefKind, Res}; @@ -35,15 +34,13 @@ pub(super) fn check_if_let<'tcx>( // Extract the generic arguments out of a type fn try_get_generic_ty(ty: Ty<'_>, index: usize) -> Option<Ty<'_>> { - if_chain! { - if let ty::Adt(_, subs) = ty.kind(); - if let Some(sub) = subs.get(index); - if let GenericArgKind::Type(sub_ty) = sub.unpack(); - then { - Some(sub_ty) - } else { - None - } + if let ty::Adt(_, subs) = ty.kind() + && let Some(sub) = subs.get(index) + && let GenericArgKind::Type(sub_ty) = sub.unpack() + { + Some(sub_ty) + } else { + None } } @@ -142,14 +139,12 @@ fn find_sugg_for_if_let<'tcx>( let needs_drop = needs_ordered_drop(cx, check_ty) || any_temporaries_need_ordered_drop(cx, let_expr); // check that `while_let_on_iterator` lint does not trigger - if_chain! { - if keyword == "while"; - if let ExprKind::MethodCall(method_path, ..) = let_expr.kind; - if method_path.ident.name == sym::next; - if is_trait_method(cx, let_expr, sym::Iterator); - then { - return; - } + if keyword == "while" + && let ExprKind::MethodCall(method_path, ..) = let_expr.kind + && method_path.ident.name == sym::next + && is_trait_method(cx, let_expr, sym::Iterator) + { + return; } let result_expr = match &let_expr.kind { diff --git a/src/tools/clippy/clippy_lints/src/matches/rest_pat_in_fully_bound_struct.rs b/src/tools/clippy/clippy_lints/src/matches/rest_pat_in_fully_bound_struct.rs index 4efe93d4b..316b2f63e 100644 --- a/src/tools/clippy/clippy_lints/src/matches/rest_pat_in_fully_bound_struct.rs +++ b/src/tools/clippy/clippy_lints/src/matches/rest_pat_in_fully_bound_struct.rs @@ -6,25 +6,22 @@ use rustc_middle::ty; use super::REST_PAT_IN_FULLY_BOUND_STRUCTS; pub(crate) fn check(cx: &LateContext<'_>, pat: &Pat<'_>) { - if_chain! { - if !pat.span.from_expansion(); - if let PatKind::Struct(QPath::Resolved(_, path), fields, true) = pat.kind; - if let Some(def_id) = path.res.opt_def_id(); - let ty = cx.tcx.type_of(def_id).instantiate_identity(); - if let ty::Adt(def, _) = ty.kind(); - if def.is_struct() || def.is_union(); - if fields.len() == def.non_enum_variant().fields.len(); - if !def.non_enum_variant().is_field_list_non_exhaustive(); - - then { - span_lint_and_help( - cx, - REST_PAT_IN_FULLY_BOUND_STRUCTS, - pat.span, - "unnecessary use of `..` pattern in struct binding. All fields were already bound", - None, - "consider removing `..` from this binding", - ); - } + if !pat.span.from_expansion() + && let PatKind::Struct(QPath::Resolved(_, path), fields, true) = pat.kind + && let Some(def_id) = path.res.opt_def_id() + && let ty = cx.tcx.type_of(def_id).instantiate_identity() + && let ty::Adt(def, _) = ty.kind() + && (def.is_struct() || def.is_union()) + && fields.len() == def.non_enum_variant().fields.len() + && !def.non_enum_variant().is_field_list_non_exhaustive() + { + span_lint_and_help( + cx, + REST_PAT_IN_FULLY_BOUND_STRUCTS, + pat.span, + "unnecessary use of `..` pattern in struct binding. All fields were already bound", + None, + "consider removing `..` from this binding", + ); } } diff --git a/src/tools/clippy/clippy_lints/src/matches/single_match.rs b/src/tools/clippy/clippy_lints/src/matches/single_match.rs index 48efd0230..86c414daf 100644 --- a/src/tools/clippy/clippy_lints/src/matches/single_match.rs +++ b/src/tools/clippy/clippy_lints/src/matches/single_match.rs @@ -89,50 +89,52 @@ fn report_single_pattern( }); let (pat, pat_ref_count) = peel_hir_pat_refs(arms[0].pat); - let (msg, sugg) = if_chain! { - if let PatKind::Path(_) | PatKind::Lit(_) = pat.kind; - let (ty, ty_ref_count) = peel_mid_ty_refs(cx.typeck_results().expr_ty(ex)); - if let Some(spe_trait_id) = cx.tcx.lang_items().structural_peq_trait(); - if let Some(pe_trait_id) = cx.tcx.lang_items().eq_trait(); - if ty.is_integral() || ty.is_char() || ty.is_str() - || (implements_trait(cx, ty, spe_trait_id, &[]) - && implements_trait(cx, ty, pe_trait_id, &[ty.into()])); - then { - // scrutinee derives PartialEq and the pattern is a constant. - let pat_ref_count = match pat.kind { - // string literals are already a reference. - PatKind::Lit(Expr { kind: ExprKind::Lit(lit), .. }) if lit.node.is_str() => pat_ref_count + 1, - _ => pat_ref_count, - }; - // References are only implicitly added to the pattern, so no overflow here. - // e.g. will work: match &Some(_) { Some(_) => () } - // will not: match Some(_) { &Some(_) => () } - let ref_count_diff = ty_ref_count - pat_ref_count; - - // Try to remove address of expressions first. - let (ex, removed) = peel_n_hir_expr_refs(ex, ref_count_diff); - let ref_count_diff = ref_count_diff - removed; - - let msg = "you seem to be trying to use `match` for an equality check. Consider using `if`"; - let sugg = format!( - "if {} == {}{} {}{els_str}", - snippet(cx, ex.span, ".."), - // PartialEq for different reference counts may not exist. - "&".repeat(ref_count_diff), - snippet(cx, arms[0].pat.span, ".."), - expr_block(cx, arms[0].body, ctxt, "..", Some(expr.span), &mut app), - ); - (msg, sugg) - } else { - let msg = "you seem to be trying to use `match` for destructuring a single pattern. Consider using `if let`"; - let sugg = format!( - "if let {} = {} {}{els_str}", - snippet(cx, arms[0].pat.span, ".."), - snippet(cx, ex.span, ".."), - expr_block(cx, arms[0].body, ctxt, "..", Some(expr.span), &mut app), - ); - (msg, sugg) - } + let (msg, sugg) = if let PatKind::Path(_) | PatKind::Lit(_) = pat.kind + && let (ty, ty_ref_count) = peel_mid_ty_refs(cx.typeck_results().expr_ty(ex)) + && let Some(spe_trait_id) = cx.tcx.lang_items().structural_peq_trait() + && let Some(pe_trait_id) = cx.tcx.lang_items().eq_trait() + && (ty.is_integral() + || ty.is_char() + || ty.is_str() + || (implements_trait(cx, ty, spe_trait_id, &[]) && implements_trait(cx, ty, pe_trait_id, &[ty.into()]))) + { + // scrutinee derives PartialEq and the pattern is a constant. + let pat_ref_count = match pat.kind { + // string literals are already a reference. + PatKind::Lit(Expr { + kind: ExprKind::Lit(lit), + .. + }) if lit.node.is_str() => pat_ref_count + 1, + _ => pat_ref_count, + }; + // References are only implicitly added to the pattern, so no overflow here. + // e.g. will work: match &Some(_) { Some(_) => () } + // will not: match Some(_) { &Some(_) => () } + let ref_count_diff = ty_ref_count - pat_ref_count; + + // Try to remove address of expressions first. + let (ex, removed) = peel_n_hir_expr_refs(ex, ref_count_diff); + let ref_count_diff = ref_count_diff - removed; + + let msg = "you seem to be trying to use `match` for an equality check. Consider using `if`"; + let sugg = format!( + "if {} == {}{} {}{els_str}", + snippet(cx, ex.span, ".."), + // PartialEq for different reference counts may not exist. + "&".repeat(ref_count_diff), + snippet(cx, arms[0].pat.span, ".."), + expr_block(cx, arms[0].body, ctxt, "..", Some(expr.span), &mut app), + ); + (msg, sugg) + } else { + let msg = "you seem to be trying to use `match` for destructuring a single pattern. Consider using `if let`"; + let sugg = format!( + "if let {} = {} {}{els_str}", + snippet(cx, arms[0].pat.span, ".."), + snippet(cx, ex.span, ".."), + expr_block(cx, arms[0].body, ctxt, "..", Some(expr.span), &mut app), + ); + (msg, sugg) }; span_lint_and_sugg(cx, lint, expr.span, msg, "try", sugg, app); diff --git a/src/tools/clippy/clippy_lints/src/matches/try_err.rs b/src/tools/clippy/clippy_lints/src/matches/try_err.rs index 0fd6f533d..dd489fc25 100644 --- a/src/tools/clippy/clippy_lints/src/matches/try_err.rs +++ b/src/tools/clippy/clippy_lints/src/matches/try_err.rs @@ -2,7 +2,6 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet_with_applicability; use clippy_utils::ty::is_type_diagnostic_item; use clippy_utils::{get_parent_expr, is_res_lang_ctor, path_res}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::LangItem::ResultErr; use rustc_hir::{Expr, ExprKind, LangItem, MatchSource, QPath}; @@ -22,59 +21,57 @@ pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>, scrutine // #[allow(unreachable_code)] // val, // }; - if_chain! { - if let ExprKind::Call(match_fun, [try_arg, ..]) = scrutinee.kind; - if let ExprKind::Path(ref match_fun_path) = match_fun.kind; - if matches!(match_fun_path, QPath::LangItem(LangItem::TryTraitBranch, ..)); - if let ExprKind::Call(err_fun, [err_arg, ..]) = try_arg.kind; - if is_res_lang_ctor(cx, path_res(cx, err_fun), ResultErr); - if let Some(return_ty) = find_return_type(cx, &expr.kind); - then { - let prefix; - let suffix; - let err_ty; + if let ExprKind::Call(match_fun, [try_arg, ..]) = scrutinee.kind + && let ExprKind::Path(ref match_fun_path) = match_fun.kind + && matches!(match_fun_path, QPath::LangItem(LangItem::TryTraitBranch, ..)) + && let ExprKind::Call(err_fun, [err_arg, ..]) = try_arg.kind + && is_res_lang_ctor(cx, path_res(cx, err_fun), ResultErr) + && let Some(return_ty) = find_return_type(cx, &expr.kind) + { + let prefix; + let suffix; + let err_ty; - if let Some(ty) = result_error_type(cx, return_ty) { - prefix = "Err("; - suffix = ")"; - err_ty = ty; - } else if let Some(ty) = poll_result_error_type(cx, return_ty) { - prefix = "Poll::Ready(Err("; - suffix = "))"; - err_ty = ty; - } else if let Some(ty) = poll_option_result_error_type(cx, return_ty) { - prefix = "Poll::Ready(Some(Err("; - suffix = ")))"; - err_ty = ty; - } else { - return; - }; + if let Some(ty) = result_error_type(cx, return_ty) { + prefix = "Err("; + suffix = ")"; + err_ty = ty; + } else if let Some(ty) = poll_result_error_type(cx, return_ty) { + prefix = "Poll::Ready(Err("; + suffix = "))"; + err_ty = ty; + } else if let Some(ty) = poll_option_result_error_type(cx, return_ty) { + prefix = "Poll::Ready(Some(Err("; + suffix = ")))"; + err_ty = ty; + } else { + return; + }; - let expr_err_ty = cx.typeck_results().expr_ty(err_arg); - let span = hygiene::walk_chain(err_arg.span, try_arg.span.ctxt()); - let mut applicability = Applicability::MachineApplicable; - let origin_snippet = snippet_with_applicability(cx, span, "_", &mut applicability); - let ret_prefix = if get_parent_expr(cx, expr).map_or(false, |e| matches!(e.kind, ExprKind::Ret(_))) { - "" // already returns - } else { - "return " - }; - let suggestion = if err_ty == expr_err_ty { - format!("{ret_prefix}{prefix}{origin_snippet}{suffix}") - } else { - format!("{ret_prefix}{prefix}{origin_snippet}.into(){suffix}") - }; + let expr_err_ty = cx.typeck_results().expr_ty(err_arg); + let span = hygiene::walk_chain(err_arg.span, try_arg.span.ctxt()); + let mut applicability = Applicability::MachineApplicable; + let origin_snippet = snippet_with_applicability(cx, span, "_", &mut applicability); + let ret_prefix = if get_parent_expr(cx, expr).map_or(false, |e| matches!(e.kind, ExprKind::Ret(_))) { + "" // already returns + } else { + "return " + }; + let suggestion = if err_ty == expr_err_ty { + format!("{ret_prefix}{prefix}{origin_snippet}{suffix}") + } else { + format!("{ret_prefix}{prefix}{origin_snippet}.into(){suffix}") + }; - span_lint_and_sugg( - cx, - TRY_ERR, - expr.span, - "returning an `Err(_)` with the `?` operator", - "try", - suggestion, - applicability, - ); - } + span_lint_and_sugg( + cx, + TRY_ERR, + expr.span, + "returning an `Err(_)` with the `?` operator", + "try", + suggestion, + applicability, + ); } } @@ -92,51 +89,42 @@ fn find_return_type<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx ExprKind<'_>) -> O /// Extracts the error type from Result<T, E>. fn result_error_type<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>) -> Option<Ty<'tcx>> { - if_chain! { - if let ty::Adt(_, subst) = ty.kind(); - if is_type_diagnostic_item(cx, ty, sym::Result); - then { - Some(subst.type_at(1)) - } else { - None - } + if let ty::Adt(_, subst) = ty.kind() + && is_type_diagnostic_item(cx, ty, sym::Result) + { + Some(subst.type_at(1)) + } else { + None } } /// Extracts the error type from Poll<Result<T, E>>. fn poll_result_error_type<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>) -> Option<Ty<'tcx>> { - if_chain! { - if let ty::Adt(def, subst) = ty.kind(); - if cx.tcx.lang_items().get(LangItem::Poll) == Some(def.did()); - let ready_ty = subst.type_at(0); - - if let ty::Adt(ready_def, ready_subst) = ready_ty.kind(); - if cx.tcx.is_diagnostic_item(sym::Result, ready_def.did()); - then { - Some(ready_subst.type_at(1)) - } else { - None - } + if let ty::Adt(def, subst) = ty.kind() + && cx.tcx.lang_items().get(LangItem::Poll) == Some(def.did()) + && let ready_ty = subst.type_at(0) + && let ty::Adt(ready_def, ready_subst) = ready_ty.kind() + && cx.tcx.is_diagnostic_item(sym::Result, ready_def.did()) + { + Some(ready_subst.type_at(1)) + } else { + None } } /// Extracts the error type from Poll<Option<Result<T, E>>>. fn poll_option_result_error_type<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>) -> Option<Ty<'tcx>> { - if_chain! { - if let ty::Adt(def, subst) = ty.kind(); - if cx.tcx.lang_items().get(LangItem::Poll) == Some(def.did()); - let ready_ty = subst.type_at(0); - - if let ty::Adt(ready_def, ready_subst) = ready_ty.kind(); - if cx.tcx.is_diagnostic_item(sym::Option, ready_def.did()); - let some_ty = ready_subst.type_at(0); - - if let ty::Adt(some_def, some_subst) = some_ty.kind(); - if cx.tcx.is_diagnostic_item(sym::Result, some_def.did()); - then { - Some(some_subst.type_at(1)) - } else { - None - } + if let ty::Adt(def, subst) = ty.kind() + && cx.tcx.lang_items().get(LangItem::Poll) == Some(def.did()) + && let ready_ty = subst.type_at(0) + && let ty::Adt(ready_def, ready_subst) = ready_ty.kind() + && cx.tcx.is_diagnostic_item(sym::Option, ready_def.did()) + && let some_ty = ready_subst.type_at(0) + && let ty::Adt(some_def, some_subst) = some_ty.kind() + && cx.tcx.is_diagnostic_item(sym::Result, some_def.did()) + { + Some(some_subst.type_at(1)) + } else { + None } } diff --git a/src/tools/clippy/clippy_lints/src/mem_replace.rs b/src/tools/clippy/clippy_lints/src/mem_replace.rs index 760c8f59c..c22f76484 100644 --- a/src/tools/clippy/clippy_lints/src/mem_replace.rs +++ b/src/tools/clippy/clippy_lints/src/mem_replace.rs @@ -4,15 +4,14 @@ use clippy_utils::source::{snippet, snippet_with_applicability}; use clippy_utils::sugg::Sugg; use clippy_utils::ty::is_non_aggregate_primitive_type; use clippy_utils::{is_default_equivalent, is_res_lang_ctor, path_res, peel_ref_operators}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::LangItem::OptionNone; use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_tool_lint, impl_lint_pass}; -use rustc_span::Span; +use rustc_session::impl_lint_pass; use rustc_span::symbol::sym; +use rustc_span::Span; declare_clippy_lint! { /// ### What it does @@ -125,17 +124,37 @@ fn check_replace_option_with_none(cx: &LateContext<'_>, dest: &Expr<'_>, expr_sp } fn check_replace_with_uninit(cx: &LateContext<'_>, src: &Expr<'_>, dest: &Expr<'_>, expr_span: Span) { - if_chain! { + if let Some(method_def_id) = cx.typeck_results().type_dependent_def_id(src.hir_id) // check if replacement is mem::MaybeUninit::uninit().assume_init() - if let Some(method_def_id) = cx.typeck_results().type_dependent_def_id(src.hir_id); - if cx.tcx.is_diagnostic_item(sym::assume_init, method_def_id); - then { + && cx.tcx.is_diagnostic_item(sym::assume_init, method_def_id) + { + let mut applicability = Applicability::MachineApplicable; + span_lint_and_sugg( + cx, + MEM_REPLACE_WITH_UNINIT, + expr_span, + "replacing with `mem::MaybeUninit::uninit().assume_init()`", + "consider using", + format!( + "std::ptr::read({})", + snippet_with_applicability(cx, dest.span, "", &mut applicability) + ), + applicability, + ); + return; + } + + if let ExprKind::Call(repl_func, []) = src.kind + && let ExprKind::Path(ref repl_func_qpath) = repl_func.kind + && let Some(repl_def_id) = cx.qpath_res(repl_func_qpath, repl_func.hir_id).opt_def_id() + { + if cx.tcx.is_diagnostic_item(sym::mem_uninitialized, repl_def_id) { let mut applicability = Applicability::MachineApplicable; span_lint_and_sugg( cx, MEM_REPLACE_WITH_UNINIT, expr_span, - "replacing with `mem::MaybeUninit::uninit().assume_init()`", + "replacing with `mem::uninitialized()`", "consider using", format!( "std::ptr::read({})", @@ -143,40 +162,17 @@ fn check_replace_with_uninit(cx: &LateContext<'_>, src: &Expr<'_>, dest: &Expr<' ), applicability, ); - return; - } - } - - if_chain! { - if let ExprKind::Call(repl_func, []) = src.kind; - if let ExprKind::Path(ref repl_func_qpath) = repl_func.kind; - if let Some(repl_def_id) = cx.qpath_res(repl_func_qpath, repl_func.hir_id).opt_def_id(); - then { - if cx.tcx.is_diagnostic_item(sym::mem_uninitialized, repl_def_id) { - let mut applicability = Applicability::MachineApplicable; - span_lint_and_sugg( - cx, - MEM_REPLACE_WITH_UNINIT, - expr_span, - "replacing with `mem::uninitialized()`", - "consider using", - format!( - "std::ptr::read({})", - snippet_with_applicability(cx, dest.span, "", &mut applicability) - ), - applicability, - ); - } else if cx.tcx.is_diagnostic_item(sym::mem_zeroed, repl_def_id) && - !cx.typeck_results().expr_ty(src).is_primitive() { - span_lint_and_help( - cx, - MEM_REPLACE_WITH_UNINIT, - expr_span, - "replacing with `mem::zeroed()`", - None, - "consider using a default value or the `take_mut` crate instead", - ); - } + } else if cx.tcx.is_diagnostic_item(sym::mem_zeroed, repl_def_id) + && !cx.typeck_results().expr_ty(src).is_primitive() + { + span_lint_and_help( + cx, + MEM_REPLACE_WITH_UNINIT, + expr_span, + "replacing with `mem::zeroed()`", + None, + "consider using a default value or the `take_mut` crate instead", + ); } } } @@ -222,21 +218,19 @@ impl MemReplace { impl<'tcx> LateLintPass<'tcx> for MemReplace { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) { - if_chain! { + if let ExprKind::Call(func, [dest, src]) = expr.kind // Check that `expr` is a call to `mem::replace()` - if let ExprKind::Call(func, [dest, src]) = expr.kind; - if let ExprKind::Path(ref func_qpath) = func.kind; - if let Some(def_id) = cx.qpath_res(func_qpath, func.hir_id).opt_def_id(); - if cx.tcx.is_diagnostic_item(sym::mem_replace, def_id); - then { - // Check that second argument is `Option::None` - if is_res_lang_ctor(cx, path_res(cx, src), OptionNone) { - check_replace_option_with_none(cx, dest, expr.span); - } else if self.msrv.meets(msrvs::MEM_TAKE) { - check_replace_with_default(cx, src, dest, expr.span); - } - check_replace_with_uninit(cx, src, dest, expr.span); + && let ExprKind::Path(ref func_qpath) = func.kind + && let Some(def_id) = cx.qpath_res(func_qpath, func.hir_id).opt_def_id() + && cx.tcx.is_diagnostic_item(sym::mem_replace, def_id) + { + // Check that second argument is `Option::None` + if is_res_lang_ctor(cx, path_res(cx, src), OptionNone) { + check_replace_option_with_none(cx, dest, expr.span); + } else if self.msrv.meets(msrvs::MEM_TAKE) { + check_replace_with_default(cx, src, dest, expr.span); } + check_replace_with_uninit(cx, src, dest, expr.span); } } extract_msrv_attr!(LateContext); diff --git a/src/tools/clippy/clippy_lints/src/methods/bind_instead_of_map.rs b/src/tools/clippy/clippy_lints/src/methods/bind_instead_of_map.rs index 3a8cc4174..08bfa2e00 100644 --- a/src/tools/clippy/clippy_lints/src/methods/bind_instead_of_map.rs +++ b/src/tools/clippy/clippy_lints/src/methods/bind_instead_of_map.rs @@ -3,7 +3,6 @@ use clippy_utils::diagnostics::{multispan_sugg_with_applicability, span_lint_and use clippy_utils::peel_blocks; use clippy_utils::source::{snippet, snippet_with_context}; use clippy_utils::visitors::find_all_ret_expressions; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_hir::def::{CtorKind, CtorOf, DefKind, Res}; @@ -70,57 +69,50 @@ pub(crate) trait BindInsteadOfMap { closure_expr: &hir::Expr<'_>, closure_args_span: Span, ) -> bool { - if_chain! { - if let hir::ExprKind::Call(some_expr, [inner_expr]) = closure_expr.kind; - if let hir::ExprKind::Path(QPath::Resolved(_, path)) = some_expr.kind; - if Self::is_variant(cx, path.res); - if !contains_return(inner_expr); - if let Some(msg) = Self::lint_msg(cx); - then { - let mut app = Applicability::MachineApplicable; - let some_inner_snip = snippet_with_context(cx, inner_expr.span, closure_expr.span.ctxt(), "_", &mut app).0; - - let closure_args_snip = snippet(cx, closure_args_span, ".."); - let option_snip = snippet(cx, recv.span, ".."); - let note = format!("{option_snip}.{}({closure_args_snip} {some_inner_snip})", Self::GOOD_METHOD_NAME); - span_lint_and_sugg( - cx, - BIND_INSTEAD_OF_MAP, - expr.span, - &msg, - "try", - note, - app, - ); - true - } else { - false - } + if let hir::ExprKind::Call(some_expr, [inner_expr]) = closure_expr.kind + && let hir::ExprKind::Path(QPath::Resolved(_, path)) = some_expr.kind + && Self::is_variant(cx, path.res) + && !contains_return(inner_expr) + && let Some(msg) = Self::lint_msg(cx) + { + let mut app = Applicability::MachineApplicable; + let some_inner_snip = snippet_with_context(cx, inner_expr.span, closure_expr.span.ctxt(), "_", &mut app).0; + + let closure_args_snip = snippet(cx, closure_args_span, ".."); + let option_snip = snippet(cx, recv.span, ".."); + let note = format!( + "{option_snip}.{}({closure_args_snip} {some_inner_snip})", + Self::GOOD_METHOD_NAME + ); + span_lint_and_sugg(cx, BIND_INSTEAD_OF_MAP, expr.span, &msg, "try", note, app); + true + } else { + false } } fn lint_closure(cx: &LateContext<'_>, expr: &hir::Expr<'_>, closure_expr: &hir::Expr<'_>) -> bool { let mut suggs = Vec::new(); let can_sugg: bool = find_all_ret_expressions(cx, closure_expr, |ret_expr| { - if_chain! { - if !ret_expr.span.from_expansion(); - if let hir::ExprKind::Call(func_path, [arg]) = ret_expr.kind; - if let hir::ExprKind::Path(QPath::Resolved(_, path)) = func_path.kind; - if Self::is_variant(cx, path.res); - if !contains_return(arg); - then { - suggs.push((ret_expr.span, arg.span.source_callsite())); - true - } else { - false - } + if !ret_expr.span.from_expansion() + && let hir::ExprKind::Call(func_path, [arg]) = ret_expr.kind + && let hir::ExprKind::Path(QPath::Resolved(_, path)) = func_path.kind + && Self::is_variant(cx, path.res) + && !contains_return(arg) + { + suggs.push((ret_expr.span, arg.span.source_callsite())); + true + } else { + false } }); - let (span, msg) = if_chain! { - if can_sugg; - if let hir::ExprKind::MethodCall(segment, ..) = expr.kind; - if let Some(msg) = Self::lint_msg(cx); - then { (segment.ident.span, msg) } else { return false; } + let (span, msg) = if can_sugg + && let hir::ExprKind::MethodCall(segment, ..) = expr.kind + && let Some(msg) = Self::lint_msg(cx) + { + (segment.ident.span, msg) + } else { + return false; }; span_lint_and_then(cx, BIND_INSTEAD_OF_MAP, expr.span, &msg, |diag| { multispan_sugg_with_applicability( @@ -139,11 +131,12 @@ pub(crate) trait BindInsteadOfMap { /// Lint use of `_.and_then(|x| Some(y))` for `Option`s fn check(cx: &LateContext<'_>, expr: &hir::Expr<'_>, recv: &hir::Expr<'_>, arg: &hir::Expr<'_>) -> bool { - if_chain! { - if let Some(adt) = cx.typeck_results().expr_ty(recv).ty_adt_def(); - if let Some(vid) = cx.tcx.lang_items().get(Self::VARIANT_LANG_ITEM); - if adt.did() == cx.tcx.parent(vid); - then {} else { return false; } + if let Some(adt) = cx.typeck_results().expr_ty(recv).ty_adt_def() + && let Some(vid) = cx.tcx.lang_items().get(Self::VARIANT_LANG_ITEM) + && adt.did() == cx.tcx.parent(vid) + { + } else { + return false; } match arg.kind { diff --git a/src/tools/clippy/clippy_lints/src/methods/bytecount.rs b/src/tools/clippy/clippy_lints/src/methods/bytecount.rs index 35370355f..4a2124c74 100644 --- a/src/tools/clippy/clippy_lints/src/methods/bytecount.rs +++ b/src/tools/clippy/clippy_lints/src/methods/bytecount.rs @@ -3,7 +3,6 @@ use clippy_utils::source::snippet_with_applicability; use clippy_utils::ty::is_type_diagnostic_item; use clippy_utils::visitors::is_local_used; use clippy_utils::{path_to_local_id, peel_blocks, peel_ref_operators, strip_pat_refs}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{BinOpKind, Closure, Expr, ExprKind, PatKind}; use rustc_lint::LateContext; @@ -18,53 +17,50 @@ pub(super) fn check<'tcx>( filter_recv: &'tcx Expr<'_>, filter_arg: &'tcx Expr<'_>, ) { - if_chain! { - if let ExprKind::Closure(&Closure { body, .. }) = filter_arg.kind; - let body = cx.tcx.hir().body(body); - if let [param] = body.params; - if let PatKind::Binding(_, arg_id, _, _) = strip_pat_refs(param.pat).kind; - if let ExprKind::Binary(ref op, l, r) = body.value.kind; - if op.node == BinOpKind::Eq; - if is_type_diagnostic_item(cx, - cx.typeck_results().expr_ty(filter_recv).peel_refs(), - sym::SliceIter); - let operand_is_arg = |expr| { + if let ExprKind::Closure(&Closure { body, .. }) = filter_arg.kind + && let body = cx.tcx.hir().body(body) + && let [param] = body.params + && let PatKind::Binding(_, arg_id, _, _) = strip_pat_refs(param.pat).kind + && let ExprKind::Binary(ref op, l, r) = body.value.kind + && op.node == BinOpKind::Eq + && is_type_diagnostic_item(cx, cx.typeck_results().expr_ty(filter_recv).peel_refs(), sym::SliceIter) + && let operand_is_arg = (|expr| { let expr = peel_ref_operators(cx, peel_blocks(expr)); path_to_local_id(expr, arg_id) - }; - let needle = if operand_is_arg(l) { + }) + && let needle = if operand_is_arg(l) { r } else if operand_is_arg(r) { l } else { return; - }; - if ty::Uint(UintTy::U8) == *cx.typeck_results().expr_ty(needle).peel_refs().kind(); - if !is_local_used(cx, needle, arg_id); - then { - let haystack = if let ExprKind::MethodCall(path, receiver, [], _) = - filter_recv.kind { - let p = path.ident.name; - if p == sym::iter || p == sym::iter_mut { - receiver - } else { - filter_recv - } + } + && ty::Uint(UintTy::U8) == *cx.typeck_results().expr_ty(needle).peel_refs().kind() + && !is_local_used(cx, needle, arg_id) + { + let haystack = if let ExprKind::MethodCall(path, receiver, [], _) = filter_recv.kind { + let p = path.ident.name; + if p == sym::iter || p == sym::iter_mut { + receiver } else { filter_recv - }; - let mut applicability = Applicability::MaybeIncorrect; - span_lint_and_sugg( - cx, - NAIVE_BYTECOUNT, - expr.span, - "you appear to be counting bytes the naive way", - "consider using the bytecount crate", - format!("bytecount::count({}, {})", - snippet_with_applicability(cx, haystack.span, "..", &mut applicability), - snippet_with_applicability(cx, needle.span, "..", &mut applicability)), - applicability, - ); - } + } + } else { + filter_recv + }; + let mut applicability = Applicability::MaybeIncorrect; + span_lint_and_sugg( + cx, + NAIVE_BYTECOUNT, + expr.span, + "you appear to be counting bytes the naive way", + "consider using the bytecount crate", + format!( + "bytecount::count({}, {})", + snippet_with_applicability(cx, haystack.span, "..", &mut applicability), + snippet_with_applicability(cx, needle.span, "..", &mut applicability) + ), + applicability, + ); }; } diff --git a/src/tools/clippy/clippy_lints/src/methods/bytes_count_to_len.rs b/src/tools/clippy/clippy_lints/src/methods/bytes_count_to_len.rs index 649fc46e4..34159f2d1 100644 --- a/src/tools/clippy/clippy_lints/src/methods/bytes_count_to_len.rs +++ b/src/tools/clippy/clippy_lints/src/methods/bytes_count_to_len.rs @@ -1,7 +1,6 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet_with_applicability; use clippy_utils::ty::is_type_lang_item; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_lint::LateContext; @@ -14,23 +13,24 @@ pub(super) fn check<'tcx>( count_recv: &'tcx hir::Expr<'_>, bytes_recv: &'tcx hir::Expr<'_>, ) { - if_chain! { - if let Some(bytes_id) = cx.typeck_results().type_dependent_def_id(count_recv.hir_id); - if let Some(impl_id) = cx.tcx.impl_of_method(bytes_id); - if cx.tcx.type_of(impl_id).instantiate_identity().is_str(); - let ty = cx.typeck_results().expr_ty(bytes_recv).peel_refs(); - if ty.is_str() || is_type_lang_item(cx, ty, hir::LangItem::String); - then { - let mut applicability = Applicability::MachineApplicable; - span_lint_and_sugg( - cx, - BYTES_COUNT_TO_LEN, - expr.span, - "using long and hard to read `.bytes().count()`", - "consider calling `.len()` instead", - format!("{}.len()", snippet_with_applicability(cx, bytes_recv.span, "..", &mut applicability)), - applicability - ); - } + if let Some(bytes_id) = cx.typeck_results().type_dependent_def_id(count_recv.hir_id) + && let Some(impl_id) = cx.tcx.impl_of_method(bytes_id) + && cx.tcx.type_of(impl_id).instantiate_identity().is_str() + && let ty = cx.typeck_results().expr_ty(bytes_recv).peel_refs() + && (ty.is_str() || is_type_lang_item(cx, ty, hir::LangItem::String)) + { + let mut applicability = Applicability::MachineApplicable; + span_lint_and_sugg( + cx, + BYTES_COUNT_TO_LEN, + expr.span, + "using long and hard to read `.bytes().count()`", + "consider calling `.len()` instead", + format!( + "{}.len()", + snippet_with_applicability(cx, bytes_recv.span, "..", &mut applicability) + ), + applicability, + ); }; } diff --git a/src/tools/clippy/clippy_lints/src/methods/case_sensitive_file_extension_comparisons.rs b/src/tools/clippy/clippy_lints/src/methods/case_sensitive_file_extension_comparisons.rs index d5897822e..a37087d0a 100644 --- a/src/tools/clippy/clippy_lints/src/methods/case_sensitive_file_extension_comparisons.rs +++ b/src/tools/clippy/clippy_lints/src/methods/case_sensitive_file_extension_comparisons.rs @@ -1,7 +1,6 @@ use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::source::{indent_of, reindent_multiline, snippet_opt}; use clippy_utils::ty::is_type_lang_item; -use if_chain::if_chain; use rustc_ast::ast::LitKind; use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind, LangItem}; @@ -27,51 +26,54 @@ pub(super) fn check<'tcx>( } } - if_chain! { - if let Some(method_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id); - if let Some(impl_id) = cx.tcx.impl_of_method(method_id); - if cx.tcx.type_of(impl_id).instantiate_identity().is_str(); - if let ExprKind::Lit(Spanned { node: LitKind::Str(ext_literal, ..), ..}) = arg.kind; - if (2..=6).contains(&ext_literal.as_str().len()); - let ext_str = ext_literal.as_str(); - if ext_str.starts_with('.'); - if ext_str.chars().skip(1).all(|c| c.is_uppercase() || c.is_ascii_digit()) - || ext_str.chars().skip(1).all(|c| c.is_lowercase() || c.is_ascii_digit()); - let recv_ty = cx.typeck_results().expr_ty(recv).peel_refs(); - if recv_ty.is_str() || is_type_lang_item(cx, recv_ty, LangItem::String); - then { - span_lint_and_then( - cx, - CASE_SENSITIVE_FILE_EXTENSION_COMPARISONS, - recv.span.to(call_span), - "case-sensitive file extension comparison", - |diag| { - diag.help("consider using a case-insensitive comparison instead"); - if let Some(mut recv_source) = snippet_opt(cx, recv.span) { - - if !cx.typeck_results().expr_ty(recv).is_ref() { - recv_source = format!("&{recv_source}"); - } + if let Some(method_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id) + && let Some(impl_id) = cx.tcx.impl_of_method(method_id) + && cx.tcx.type_of(impl_id).instantiate_identity().is_str() + && let ExprKind::Lit(Spanned { + node: LitKind::Str(ext_literal, ..), + .. + }) = arg.kind + && (2..=6).contains(&ext_literal.as_str().len()) + && let ext_str = ext_literal.as_str() + && ext_str.starts_with('.') + && (ext_str.chars().skip(1).all(|c| c.is_uppercase() || c.is_ascii_digit()) + || ext_str.chars().skip(1).all(|c| c.is_lowercase() || c.is_ascii_digit())) + && let recv_ty = cx.typeck_results().expr_ty(recv).peel_refs() + && (recv_ty.is_str() || is_type_lang_item(cx, recv_ty, LangItem::String)) + { + span_lint_and_then( + cx, + CASE_SENSITIVE_FILE_EXTENSION_COMPARISONS, + recv.span.to(call_span), + "case-sensitive file extension comparison", + |diag| { + diag.help("consider using a case-insensitive comparison instead"); + if let Some(mut recv_source) = snippet_opt(cx, recv.span) { + if !cx.typeck_results().expr_ty(recv).is_ref() { + recv_source = format!("&{recv_source}"); + } - let suggestion_source = reindent_multiline( - format!( - "std::path::Path::new({}) - .extension() - .map_or(false, |ext| ext.eq_ignore_ascii_case(\"{}\"))", - recv_source, ext_str.strip_prefix('.').unwrap()).into(), - true, - Some(indent_of(cx, call_span).unwrap_or(0) + 4) - ); + let suggestion_source = reindent_multiline( + format!( + "std::path::Path::new({}) + .extension() + .map_or(false, |ext| ext.eq_ignore_ascii_case(\"{}\"))", + recv_source, + ext_str.strip_prefix('.').unwrap() + ) + .into(), + true, + Some(indent_of(cx, call_span).unwrap_or(0) + 4), + ); - diag.span_suggestion( - recv.span.to(call_span), - "use std::path::Path", - suggestion_source, - Applicability::MaybeIncorrect, - ); - } + diag.span_suggestion( + recv.span.to(call_span), + "use std::path::Path", + suggestion_source, + Applicability::MaybeIncorrect, + ); } - ); - } + }, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/methods/chars_cmp.rs b/src/tools/clippy/clippy_lints/src/methods/chars_cmp.rs index 0e41f3c21..c99cec067 100644 --- a/src/tools/clippy/clippy_lints/src/methods/chars_cmp.rs +++ b/src/tools/clippy/clippy_lints/src/methods/chars_cmp.rs @@ -1,7 +1,6 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet_with_applicability; use clippy_utils::{method_chain_args, path_def_id}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_lint::{LateContext, Lint}; @@ -15,34 +14,34 @@ pub(super) fn check( lint: &'static Lint, suggest: &str, ) -> bool { - if_chain! { - if let Some(args) = method_chain_args(info.chain, chain_methods); - if let hir::ExprKind::Call(fun, [arg_char]) = info.other.kind; - if let Some(id) = path_def_id(cx, fun).map(|ctor_id| cx.tcx.parent(ctor_id)); - if Some(id) == cx.tcx.lang_items().option_some_variant(); - then { - let mut applicability = Applicability::MachineApplicable; - let self_ty = cx.typeck_results().expr_ty_adjusted(args[0].0).peel_refs(); + if let Some(args) = method_chain_args(info.chain, chain_methods) + && let hir::ExprKind::Call(fun, [arg_char]) = info.other.kind + && let Some(id) = path_def_id(cx, fun).map(|ctor_id| cx.tcx.parent(ctor_id)) + && Some(id) == cx.tcx.lang_items().option_some_variant() + { + let mut applicability = Applicability::MachineApplicable; + let self_ty = cx.typeck_results().expr_ty_adjusted(args[0].0).peel_refs(); - if *self_ty.kind() != ty::Str { - return false; - } + if *self_ty.kind() != ty::Str { + return false; + } - span_lint_and_sugg( - cx, - lint, - info.expr.span, - &format!("you should use the `{suggest}` method"), - "like this", - format!("{}{}.{suggest}({})", - if info.eq { "" } else { "!" }, - snippet_with_applicability(cx, args[0].0.span, "..", &mut applicability), - snippet_with_applicability(cx, arg_char.span, "..", &mut applicability)), - applicability, - ); + span_lint_and_sugg( + cx, + lint, + info.expr.span, + &format!("you should use the `{suggest}` method"), + "like this", + format!( + "{}{}.{suggest}({})", + if info.eq { "" } else { "!" }, + snippet_with_applicability(cx, args[0].0.span, "..", &mut applicability), + snippet_with_applicability(cx, arg_char.span, "..", &mut applicability) + ), + applicability, + ); - return true; - } + return true; } false diff --git a/src/tools/clippy/clippy_lints/src/methods/chars_cmp_with_unwrap.rs b/src/tools/clippy/clippy_lints/src/methods/chars_cmp_with_unwrap.rs index c9d50a5b0..d07e45434 100644 --- a/src/tools/clippy/clippy_lints/src/methods/chars_cmp_with_unwrap.rs +++ b/src/tools/clippy/clippy_lints/src/methods/chars_cmp_with_unwrap.rs @@ -1,7 +1,6 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::method_chain_args; use clippy_utils::source::snippet_with_applicability; -use if_chain::if_chain; use rustc_ast::ast; use rustc_errors::Applicability; use rustc_hir as hir; @@ -15,28 +14,28 @@ pub(super) fn check( lint: &'static Lint, suggest: &str, ) -> bool { - if_chain! { - if let Some(args) = method_chain_args(info.chain, chain_methods); - if let hir::ExprKind::Lit(lit) = info.other.kind; - if let ast::LitKind::Char(c) = lit.node; - then { - let mut applicability = Applicability::MachineApplicable; - span_lint_and_sugg( - cx, - lint, - info.expr.span, - &format!("you should use the `{suggest}` method"), - "like this", - format!("{}{}.{suggest}('{}')", - if info.eq { "" } else { "!" }, - snippet_with_applicability(cx, args[0].0.span, "..", &mut applicability), - c.escape_default()), - applicability, - ); + if let Some(args) = method_chain_args(info.chain, chain_methods) + && let hir::ExprKind::Lit(lit) = info.other.kind + && let ast::LitKind::Char(c) = lit.node + { + let mut applicability = Applicability::MachineApplicable; + span_lint_and_sugg( + cx, + lint, + info.expr.span, + &format!("you should use the `{suggest}` method"), + "like this", + format!( + "{}{}.{suggest}('{}')", + if info.eq { "" } else { "!" }, + snippet_with_applicability(cx, args[0].0.span, "..", &mut applicability), + c.escape_default() + ), + applicability, + ); - true - } else { - false - } + true + } else { + false } } diff --git a/src/tools/clippy/clippy_lints/src/methods/clone_on_copy.rs b/src/tools/clippy/clippy_lints/src/methods/clone_on_copy.rs index eb4f003d3..532bbbeaf 100644 --- a/src/tools/clippy/clippy_lints/src/methods/clone_on_copy.rs +++ b/src/tools/clippy/clippy_lints/src/methods/clone_on_copy.rs @@ -61,7 +61,7 @@ pub(super) fn check( // ? is a Call, makes sure not to rec *x?, but rather (*x)? ExprKind::Call(hir_callee, _) => matches!( hir_callee.kind, - ExprKind::Path(QPath::LangItem(rustc_hir::LangItem::TryTraitBranch, _, _)) + ExprKind::Path(QPath::LangItem(rustc_hir::LangItem::TryTraitBranch, ..)) ), ExprKind::MethodCall(_, self_arg, ..) if expr.hir_id == self_arg.hir_id => true, ExprKind::Match(_, _, MatchSource::TryDesugar(_) | MatchSource::AwaitDesugar) diff --git a/src/tools/clippy/clippy_lints/src/methods/err_expect.rs b/src/tools/clippy/clippy_lints/src/methods/err_expect.rs index a8d4dd5e4..dc978c8a5 100644 --- a/src/tools/clippy/clippy_lints/src/methods/err_expect.rs +++ b/src/tools/clippy/clippy_lints/src/methods/err_expect.rs @@ -16,30 +16,27 @@ pub(super) fn check( err_span: Span, msrv: &Msrv, ) { - if_chain! { - if is_type_diagnostic_item(cx, cx.typeck_results().expr_ty(recv), sym::Result); + if is_type_diagnostic_item(cx, cx.typeck_results().expr_ty(recv), sym::Result) // Test the version to make sure the lint can be showed (expect_err has been // introduced in rust 1.17.0 : https://github.com/rust-lang/rust/pull/38982) - if msrv.meets(msrvs::EXPECT_ERR); + && msrv.meets(msrvs::EXPECT_ERR) // Grabs the `Result<T, E>` type - let result_type = cx.typeck_results().expr_ty(recv); + && let result_type = cx.typeck_results().expr_ty(recv) // Tests if the T type in a `Result<T, E>` is not None - if let Some(data_type) = get_data_type(cx, result_type); + && let Some(data_type) = get_data_type(cx, result_type) // Tests if the T type in a `Result<T, E>` implements debug - if has_debug_impl(cx, data_type); - - then { - span_lint_and_sugg( - cx, - ERR_EXPECT, - err_span.to(expect_span), - "called `.err().expect()` on a `Result` value", - "try", - "expect_err".to_string(), - Applicability::MachineApplicable + && has_debug_impl(cx, data_type) + { + span_lint_and_sugg( + cx, + ERR_EXPECT, + err_span.to(expect_span), + "called `.err().expect()` on a `Result` value", + "try", + "expect_err".to_string(), + Applicability::MachineApplicable, ); - } }; } diff --git a/src/tools/clippy/clippy_lints/src/methods/expect_fun_call.rs b/src/tools/clippy/clippy_lints/src/methods/expect_fun_call.rs index a49970b53..f0fc92579 100644 --- a/src/tools/clippy/clippy_lints/src/methods/expect_fun_call.rs +++ b/src/tools/clippy/clippy_lints/src/methods/expect_fun_call.rs @@ -6,8 +6,8 @@ use rustc_errors::Applicability; use rustc_hir as hir; use rustc_lint::LateContext; use rustc_middle::ty; -use rustc_span::Span; use rustc_span::symbol::sym; +use rustc_span::Span; use std::borrow::Cow; use super::EXPECT_FUN_CALL; diff --git a/src/tools/clippy/clippy_lints/src/methods/extend_with_drain.rs b/src/tools/clippy/clippy_lints/src/methods/extend_with_drain.rs index 495b26652..460ec7b36 100644 --- a/src/tools/clippy/clippy_lints/src/methods/extend_with_drain.rs +++ b/src/tools/clippy/clippy_lints/src/methods/extend_with_drain.rs @@ -1,7 +1,6 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet_with_applicability; use clippy_utils::ty::{is_type_diagnostic_item, is_type_lang_item}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind, LangItem}; use rustc_lint::LateContext; @@ -11,35 +10,33 @@ use super::EXTEND_WITH_DRAIN; pub(super) fn check(cx: &LateContext<'_>, expr: &Expr<'_>, recv: &Expr<'_>, arg: &Expr<'_>) { let ty = cx.typeck_results().expr_ty(recv).peel_refs(); - if_chain! { - if is_type_diagnostic_item(cx, ty, sym::Vec); + if is_type_diagnostic_item(cx, ty, sym::Vec) //check source object - if let ExprKind::MethodCall(src_method, drain_vec, [drain_arg], _) = &arg.kind; - if src_method.ident.as_str() == "drain"; - let src_ty = cx.typeck_results().expr_ty(drain_vec); + && let ExprKind::MethodCall(src_method, drain_vec, [drain_arg], _) = &arg.kind + && src_method.ident.as_str() == "drain" + && let src_ty = cx.typeck_results().expr_ty(drain_vec) //check if actual src type is mutable for code suggestion - let immutable = src_ty.is_mutable_ptr(); - let src_ty = src_ty.peel_refs(); - if is_type_diagnostic_item(cx, src_ty, sym::Vec); + && let immutable = src_ty.is_mutable_ptr() + && let src_ty = src_ty.peel_refs() + && is_type_diagnostic_item(cx, src_ty, sym::Vec) //check drain range - if let src_ty_range = cx.typeck_results().expr_ty(drain_arg).peel_refs(); - if is_type_lang_item(cx, src_ty_range, LangItem::RangeFull); - then { - let mut applicability = Applicability::MachineApplicable; - span_lint_and_sugg( - cx, - EXTEND_WITH_DRAIN, - expr.span, - "use of `extend` instead of `append` for adding the full range of a second vector", - "try", - format!( - "{}.append({}{})", - snippet_with_applicability(cx, recv.span, "..", &mut applicability), - if immutable { "" } else { "&mut " }, - snippet_with_applicability(cx, drain_vec.span, "..", &mut applicability) - ), - applicability, - ); - } + && let src_ty_range = cx.typeck_results().expr_ty(drain_arg).peel_refs() + && is_type_lang_item(cx, src_ty_range, LangItem::RangeFull) + { + let mut applicability = Applicability::MachineApplicable; + span_lint_and_sugg( + cx, + EXTEND_WITH_DRAIN, + expr.span, + "use of `extend` instead of `append` for adding the full range of a second vector", + "try", + format!( + "{}.append({}{})", + snippet_with_applicability(cx, recv.span, "..", &mut applicability), + if immutable { "" } else { "&mut " }, + snippet_with_applicability(cx, drain_vec.span, "..", &mut applicability) + ), + applicability, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/methods/filetype_is_file.rs b/src/tools/clippy/clippy_lints/src/methods/filetype_is_file.rs index 7818be811..b05361ab2 100644 --- a/src/tools/clippy/clippy_lints/src/methods/filetype_is_file.rs +++ b/src/tools/clippy/clippy_lints/src/methods/filetype_is_file.rs @@ -1,7 +1,6 @@ use clippy_utils::diagnostics::span_lint_and_help; use clippy_utils::get_parent_expr; use clippy_utils::ty::is_type_diagnostic_item; -use if_chain::if_chain; use rustc_hir as hir; use rustc_lint::LateContext; use rustc_span::{sym, Span}; @@ -19,21 +18,19 @@ pub(super) fn check(cx: &LateContext<'_>, expr: &hir::Expr<'_>, recv: &hir::Expr let verb: &str; let lint_unary: &str; let help_unary: &str; - if_chain! { - if let Some(parent) = get_parent_expr(cx, expr); - if let hir::ExprKind::Unary(op, _) = parent.kind; - if op == hir::UnOp::Not; - then { - lint_unary = "!"; - verb = "denies"; - help_unary = ""; - span = parent.span; - } else { - lint_unary = ""; - verb = "covers"; - help_unary = "!"; - span = expr.span; - } + if let Some(parent) = get_parent_expr(cx, expr) + && let hir::ExprKind::Unary(op, _) = parent.kind + && op == hir::UnOp::Not + { + lint_unary = "!"; + verb = "denies"; + help_unary = ""; + span = parent.span; + } else { + lint_unary = ""; + verb = "covers"; + help_unary = "!"; + span = expr.span; } let lint_msg = format!("`{lint_unary}FileType::is_file()` only {verb} regular files"); let help_msg = format!("use `{help_unary}FileType::is_dir()` instead"); diff --git a/src/tools/clippy/clippy_lints/src/methods/filter_map.rs b/src/tools/clippy/clippy_lints/src/methods/filter_map.rs index 5bb8c7a6b..844ab40ca 100644 --- a/src/tools/clippy/clippy_lints/src/methods/filter_map.rs +++ b/src/tools/clippy/clippy_lints/src/methods/filter_map.rs @@ -4,15 +4,14 @@ use clippy_utils::source::{indent_of, reindent_multiline, snippet}; use clippy_utils::ty::is_type_diagnostic_item; use clippy_utils::{higher, is_trait_method, path_to_local_id, peel_blocks, SpanlessEq}; use hir::{Body, HirId, MatchSource, Pat}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_hir::def::Res; use rustc_hir::{Closure, Expr, ExprKind, PatKind, PathSegment, QPath, UnOp}; use rustc_lint::LateContext; use rustc_middle::ty::adjustment::Adjust; -use rustc_span::Span; use rustc_span::symbol::{sym, Ident, Symbol}; +use rustc_span::Span; use std::borrow::Cow; use super::{MANUAL_FILTER_MAP, MANUAL_FIND_MAP, OPTION_FILTER_MAP}; @@ -29,13 +28,11 @@ fn is_method(cx: &LateContext<'_>, expr: &hir::Expr<'_>, method_name: Symbol) -> let arg_id = body.params[0].pat.hir_id; match closure_expr.kind { hir::ExprKind::MethodCall(hir::PathSegment { ident, .. }, receiver, ..) => { - if_chain! { - if ident.name == method_name; - if let hir::ExprKind::Path(path) = &receiver.kind; - if let Res::Local(ref local) = cx.qpath_res(path, receiver.hir_id); - then { - return arg_id == *local - } + if ident.name == method_name + && let hir::ExprKind::Path(path) = &receiver.kind + && let Res::Local(ref local) = cx.qpath_res(path, receiver.hir_id) + { + return arg_id == *local; } false }, @@ -139,11 +136,9 @@ impl<'tcx> OffendingFilterExpr<'tcx> { && path_to_local_id(map_arg_peeled, map_param_id)) && let eq_fallback = (|a: &Expr<'_>, b: &Expr<'_>| { // in `filter(|x| ..)`, replace `*x` with `x` - let a_path = if_chain! { - if !is_filter_param_ref; - if let ExprKind::Unary(UnOp::Deref, expr_path) = a.kind; - then { expr_path } else { a } - }; + let a_path = if !is_filter_param_ref + && let ExprKind::Unary(UnOp::Deref, expr_path) = a.kind + { expr_path } else { a }; // let the filter closure arg and the map closure arg be equal path_to_local_id(a_path, filter_param_id) && path_to_local_id(b, map_param_id) @@ -305,87 +300,98 @@ pub(super) fn check( return; } - if_chain! { - if is_trait_method(cx, map_recv, sym::Iterator); + if is_trait_method(cx, map_recv, sym::Iterator) // filter(|x| ...is_some())... - if let ExprKind::Closure(&Closure { body: filter_body_id, .. }) = filter_arg.kind; - let filter_body = cx.tcx.hir().body(filter_body_id); - if let [filter_param] = filter_body.params; + && let ExprKind::Closure(&Closure { body: filter_body_id, .. }) = filter_arg.kind + && let filter_body = cx.tcx.hir().body(filter_body_id) + && let [filter_param] = filter_body.params // optional ref pattern: `filter(|&x| ..)` - let (filter_pat, is_filter_param_ref) = if let PatKind::Ref(ref_pat, _) = filter_param.pat.kind { + && let (filter_pat, is_filter_param_ref) = if let PatKind::Ref(ref_pat, _) = filter_param.pat.kind { (ref_pat, true) } else { (filter_param.pat, false) - }; - - if let PatKind::Binding(_, filter_param_id, _, None) = filter_pat.kind; - if let Some(mut offending_expr) = OffendingFilterExpr::hir(cx, filter_body.value, filter_param_id); + } - if let ExprKind::Closure(&Closure { body: map_body_id, .. }) = map_arg.kind; - let map_body = cx.tcx.hir().body(map_body_id); - if let [map_param] = map_body.params; - if let PatKind::Binding(_, map_param_id, map_param_ident, None) = map_param.pat.kind; + && let PatKind::Binding(_, filter_param_id, _, None) = filter_pat.kind + && let Some(mut offending_expr) = OffendingFilterExpr::hir(cx, filter_body.value, filter_param_id) - if let Some(check_result) = - offending_expr.check_map_call(cx, map_body, map_param_id, filter_param_id, is_filter_param_ref); + && let ExprKind::Closure(&Closure { body: map_body_id, .. }) = map_arg.kind + && let map_body = cx.tcx.hir().body(map_body_id) + && let [map_param] = map_body.params + && let PatKind::Binding(_, map_param_id, map_param_ident, None) = map_param.pat.kind - then { - let span = filter_span.with_hi(expr.span.hi()); - let (filter_name, lint) = if is_find { - ("find", MANUAL_FIND_MAP) - } else { - ("filter", MANUAL_FILTER_MAP) - }; - let msg = format!("`{filter_name}(..).map(..)` can be simplified as `{filter_name}_map(..)`"); + && let Some(check_result) = + offending_expr.check_map_call(cx, map_body, map_param_id, filter_param_id, is_filter_param_ref) + { + let span = filter_span.with_hi(expr.span.hi()); + let (filter_name, lint) = if is_find { + ("find", MANUAL_FIND_MAP) + } else { + ("filter", MANUAL_FILTER_MAP) + }; + let msg = format!("`{filter_name}(..).map(..)` can be simplified as `{filter_name}_map(..)`"); - let (sugg, note_and_span, applicability) = match check_result { - CheckResult::Method { map_arg, method, side_effect_expr_span } => { - let (to_opt, deref) = match method { - CalledMethod::ResultIsOk => (".ok()", String::new()), - CalledMethod::OptionIsSome => { - let derefs = cx.typeck_results() - .expr_adjustments(map_arg) - .iter() - .filter(|adj| matches!(adj.kind, Adjust::Deref(_))) - .count(); + let (sugg, note_and_span, applicability) = match check_result { + CheckResult::Method { + map_arg, + method, + side_effect_expr_span, + } => { + let (to_opt, deref) = match method { + CalledMethod::ResultIsOk => (".ok()", String::new()), + CalledMethod::OptionIsSome => { + let derefs = cx + .typeck_results() + .expr_adjustments(map_arg) + .iter() + .filter(|adj| matches!(adj.kind, Adjust::Deref(_))) + .count(); - ("", "*".repeat(derefs)) - } - }; + ("", "*".repeat(derefs)) + }, + }; - let sugg = format!( - "{filter_name}_map(|{map_param_ident}| {deref}{}{to_opt})", - snippet(cx, map_arg.span, ".."), - ); - let (note_and_span, applicability) = if let Some(span) = side_effect_expr_span { - let note = "the suggestion might change the behavior of the program when merging `filter` and `map`, \ - because this expression potentially contains side effects and will only execute once"; + let sugg = format!( + "{filter_name}_map(|{map_param_ident}| {deref}{}{to_opt})", + snippet(cx, map_arg.span, ".."), + ); + let (note_and_span, applicability) = if let Some(span) = side_effect_expr_span { + let note = "the suggestion might change the behavior of the program when merging `filter` and `map`, \ + because this expression potentially contains side effects and will only execute once"; - (Some((note, span)), Applicability::MaybeIncorrect) - } else { - (None, Applicability::MachineApplicable) - }; + (Some((note, span)), Applicability::MaybeIncorrect) + } else { + (None, Applicability::MachineApplicable) + }; - (sugg, note_and_span, applicability) - } - CheckResult::PatternMatching { variant_span, variant_ident } => { - let pat = snippet(cx, variant_span, "<pattern>"); + (sugg, note_and_span, applicability) + }, + CheckResult::PatternMatching { + variant_span, + variant_ident, + } => { + let pat = snippet(cx, variant_span, "<pattern>"); - (format!("{filter_name}_map(|{map_param_ident}| match {map_param_ident} {{ \ - {pat} => Some({variant_ident}), \ - _ => None \ - }})"), None, Applicability::MachineApplicable) - } - }; - span_lint_and_then(cx, lint, span, &msg, |diag| { - diag.span_suggestion(span, "try", sugg, applicability); + ( + format!( + "{filter_name}_map(|{map_param_ident}| match {map_param_ident} {{ \ + {pat} => Some({variant_ident}), \ + _ => None \ + }})" + ), + None, + Applicability::MachineApplicable, + ) + }, + }; + span_lint_and_then(cx, lint, span, &msg, |diag| { + diag.span_suggestion(span, "try", sugg, applicability); - if let Some((note, span)) = note_and_span { - diag.span_note(span, note); - } - }); - } + if let Some((note, span)) = note_and_span { + diag.span_note(span, note); + } + }); } } diff --git a/src/tools/clippy/clippy_lints/src/methods/filter_map_bool_then.rs b/src/tools/clippy/clippy_lints/src/methods/filter_map_bool_then.rs index 9950c4428..2e43d19a6 100644 --- a/src/tools/clippy/clippy_lints/src/methods/filter_map_bool_then.rs +++ b/src/tools/clippy/clippy_lints/src/methods/filter_map_bool_then.rs @@ -27,7 +27,7 @@ pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>, arg: & closure.def_id.to_def_id(), Binder::bind_with_vars( cx.typeck_results().node_type(param_ty.hir_id), - cx.tcx.late_bound_vars(cx.tcx.hir().local_def_id_to_hir_id(closure.def_id)), + cx.tcx.late_bound_vars(cx.tcx.local_def_id_to_hir_id(closure.def_id)), ), ) && is_copy(cx, param_ty) diff --git a/src/tools/clippy/clippy_lints/src/methods/filter_next.rs b/src/tools/clippy/clippy_lints/src/methods/filter_next.rs index ac7bc9bcc..9251130a3 100644 --- a/src/tools/clippy/clippy_lints/src/methods/filter_next.rs +++ b/src/tools/clippy/clippy_lints/src/methods/filter_next.rs @@ -44,7 +44,7 @@ pub(super) fn check<'tcx>( // add note if not multi-line span_lint_and_then(cx, FILTER_NEXT, expr.span, msg, |diag| { let (applicability, pat) = if let Some(id) = path_to_local(recv) - && let Some(hir::Node::Pat(pat)) = cx.tcx.hir().find(id) + && let Some(hir::Node::Pat(pat)) = cx.tcx.opt_hir_node(id) && let hir::PatKind::Binding(BindingAnnotation(_, Mutability::Not), _, ident, _) = pat.kind { (Applicability::Unspecified, Some((pat.span, ident))) diff --git a/src/tools/clippy/clippy_lints/src/methods/from_iter_instead_of_collect.rs b/src/tools/clippy/clippy_lints/src/methods/from_iter_instead_of_collect.rs index 4040d3a5f..917a8e33e 100644 --- a/src/tools/clippy/clippy_lints/src/methods/from_iter_instead_of_collect.rs +++ b/src/tools/clippy/clippy_lints/src/methods/from_iter_instead_of_collect.rs @@ -2,7 +2,6 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet_opt; use clippy_utils::ty::implements_trait; use clippy_utils::{is_path_diagnostic_item, sugg}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_lint::LateContext; @@ -12,28 +11,25 @@ use rustc_span::sym; use super::FROM_ITER_INSTEAD_OF_COLLECT; pub(super) fn check(cx: &LateContext<'_>, expr: &hir::Expr<'_>, args: &[hir::Expr<'_>], func: &hir::Expr<'_>) { - if_chain! { - if is_path_diagnostic_item(cx, func, sym::from_iter_fn); - let ty = cx.typeck_results().expr_ty(expr); - let arg_ty = cx.typeck_results().expr_ty(&args[0]); - if let Some(iter_id) = cx.tcx.get_diagnostic_item(sym::Iterator); - - if implements_trait(cx, arg_ty, iter_id, &[]); - then { - // `expr` implements `FromIterator` trait - let iter_expr = sugg::Sugg::hir(cx, &args[0], "..").maybe_par(); - let turbofish = extract_turbofish(cx, expr, ty); - let sugg = format!("{iter_expr}.collect::<{turbofish}>()"); - span_lint_and_sugg( - cx, - FROM_ITER_INSTEAD_OF_COLLECT, - expr.span, - "usage of `FromIterator::from_iter`", - "use `.collect()` instead of `::from_iter()`", - sugg, - Applicability::MaybeIncorrect, - ); - } + if is_path_diagnostic_item(cx, func, sym::from_iter_fn) + && let ty = cx.typeck_results().expr_ty(expr) + && let arg_ty = cx.typeck_results().expr_ty(&args[0]) + && let Some(iter_id) = cx.tcx.get_diagnostic_item(sym::Iterator) + && implements_trait(cx, arg_ty, iter_id, &[]) + { + // `expr` implements `FromIterator` trait + let iter_expr = sugg::Sugg::hir(cx, &args[0], "..").maybe_par(); + let turbofish = extract_turbofish(cx, expr, ty); + let sugg = format!("{iter_expr}.collect::<{turbofish}>()"); + span_lint_and_sugg( + cx, + FROM_ITER_INSTEAD_OF_COLLECT, + expr.span, + "usage of `FromIterator::from_iter`", + "use `.collect()` instead of `::from_iter()`", + sugg, + Applicability::MaybeIncorrect, + ); } } @@ -43,41 +39,43 @@ fn extract_turbofish(cx: &LateContext<'_>, expr: &hir::Expr<'_>, ty: Ty<'_>) -> } let call_site = expr.span.source_callsite(); - if_chain! { - if let Some(snippet) = snippet_opt(cx, call_site); - let snippet_split = snippet.split("::").collect::<Vec<_>>(); - if let Some((_, elements)) = snippet_split.split_last(); - - then { - if_chain! { - if let [type_specifier, _] = snippet_split.as_slice(); - if let Some(type_specifier) = strip_angle_brackets(type_specifier); - if let Some((type_specifier, ..)) = type_specifier.split_once(" as "); - then { - type_specifier.to_string() - } else { - // is there a type specifier? (i.e.: like `<u32>` in `collections::BTreeSet::<u32>::`) - if let Some(type_specifier) = snippet_split.iter().find(|e| strip_angle_brackets(e).is_some()) { - // remove the type specifier from the path elements - let without_ts = elements.iter().filter_map(|e| { - if e == type_specifier { None } else { Some((*e).to_string()) } - }).collect::<Vec<_>>(); - // join and add the type specifier at the end (i.e.: `collections::BTreeSet<u32>`) - format!("{}{type_specifier}", without_ts.join("::")) - } else { - // type is not explicitly specified so wildcards are needed - // i.e.: 2 wildcards in `std::collections::BTreeMap<&i32, &char>` - let ty_str = ty.to_string(); - let start = ty_str.find('<').unwrap_or(0); - let end = ty_str.find('>').unwrap_or(ty_str.len()); - let nb_wildcard = ty_str[start..end].split(',').count(); - let wildcards = format!("_{}", ", _".repeat(nb_wildcard - 1)); - format!("{}<{wildcards}>", elements.join("::")) - } - } - } + if let Some(snippet) = snippet_opt(cx, call_site) + && let snippet_split = snippet.split("::").collect::<Vec<_>>() + && let Some((_, elements)) = snippet_split.split_last() + { + if let [type_specifier, _] = snippet_split.as_slice() + && let Some(type_specifier) = strip_angle_brackets(type_specifier) + && let Some((type_specifier, ..)) = type_specifier.split_once(" as ") + { + type_specifier.to_string() } else { - ty.to_string() + // is there a type specifier? (i.e.: like `<u32>` in `collections::BTreeSet::<u32>::`) + if let Some(type_specifier) = snippet_split.iter().find(|e| strip_angle_brackets(e).is_some()) { + // remove the type specifier from the path elements + let without_ts = elements + .iter() + .filter_map(|e| { + if e == type_specifier { + None + } else { + Some((*e).to_string()) + } + }) + .collect::<Vec<_>>(); + // join and add the type specifier at the end (i.e.: `collections::BTreeSet<u32>`) + format!("{}{type_specifier}", without_ts.join("::")) + } else { + // type is not explicitly specified so wildcards are needed + // i.e.: 2 wildcards in `std::collections::BTreeMap<&i32, &char>` + let ty_str = ty.to_string(); + let start = ty_str.find('<').unwrap_or(0); + let end = ty_str.find('>').unwrap_or(ty_str.len()); + let nb_wildcard = ty_str[start..end].split(',').count(); + let wildcards = format!("_{}", ", _".repeat(nb_wildcard - 1)); + format!("{}<{wildcards}>", elements.join("::")) + } } + } else { + ty.to_string() } } diff --git a/src/tools/clippy/clippy_lints/src/methods/get_first.rs b/src/tools/clippy/clippy_lints/src/methods/get_first.rs index 2e1dd3ec6..e1f1e4893 100644 --- a/src/tools/clippy/clippy_lints/src/methods/get_first.rs +++ b/src/tools/clippy/clippy_lints/src/methods/get_first.rs @@ -1,7 +1,6 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet_with_applicability; use clippy_utils::ty::is_type_diagnostic_item; -use if_chain::if_chain; use rustc_ast::LitKind; use rustc_errors::Applicability; use rustc_hir as hir; @@ -17,37 +16,38 @@ pub(super) fn check<'tcx>( recv: &'tcx hir::Expr<'_>, arg: &'tcx hir::Expr<'_>, ) { - if_chain! { - if let Some(method_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id); - if let Some(impl_id) = cx.tcx.impl_of_method(method_id); - let identity = cx.tcx.type_of(impl_id).instantiate_identity(); - if let hir::ExprKind::Lit(Spanned { node: LitKind::Int(0, _), .. }) = arg.kind; - then { - if identity.is_slice() { - let mut app = Applicability::MachineApplicable; - let slice_name = snippet_with_applicability(cx, recv.span, "..", &mut app); - span_lint_and_sugg( - cx, - GET_FIRST, - expr.span, - &format!("accessing first element with `{slice_name}.get(0)`"), - "try", - format!("{slice_name}.first()"), - app, - ); - } else if is_type_diagnostic_item(cx, identity, sym::VecDeque){ - let mut app = Applicability::MachineApplicable; - let slice_name = snippet_with_applicability(cx, recv.span, "..", &mut app); - span_lint_and_sugg( - cx, - GET_FIRST, - expr.span, - &format!("accessing first element with `{slice_name}.get(0)`"), - "try", - format!("{slice_name}.front()"), - app, - ); - } + if let Some(method_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id) + && let Some(impl_id) = cx.tcx.impl_of_method(method_id) + && let identity = cx.tcx.type_of(impl_id).instantiate_identity() + && let hir::ExprKind::Lit(Spanned { + node: LitKind::Int(0, _), + .. + }) = arg.kind + { + if identity.is_slice() { + let mut app = Applicability::MachineApplicable; + let slice_name = snippet_with_applicability(cx, recv.span, "..", &mut app); + span_lint_and_sugg( + cx, + GET_FIRST, + expr.span, + &format!("accessing first element with `{slice_name}.get(0)`"), + "try", + format!("{slice_name}.first()"), + app, + ); + } else if is_type_diagnostic_item(cx, identity, sym::VecDeque) { + let mut app = Applicability::MachineApplicable; + let slice_name = snippet_with_applicability(cx, recv.span, "..", &mut app); + span_lint_and_sugg( + cx, + GET_FIRST, + expr.span, + &format!("accessing first element with `{slice_name}.get(0)`"), + "try", + format!("{slice_name}.front()"), + app, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/methods/implicit_clone.rs b/src/tools/clippy/clippy_lints/src/methods/implicit_clone.rs index e91ce64d8..78a553eb8 100644 --- a/src/tools/clippy/clippy_lints/src/methods/implicit_clone.rs +++ b/src/tools/clippy/clippy_lints/src/methods/implicit_clone.rs @@ -2,7 +2,6 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet_with_context; use clippy_utils::ty::{implements_trait, peel_mid_ty_refs}; use clippy_utils::{is_diag_item_method, is_diag_trait_item}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_lint::LateContext; @@ -11,34 +10,32 @@ use rustc_span::sym; use super::IMPLICIT_CLONE; pub fn check(cx: &LateContext<'_>, method_name: &str, expr: &hir::Expr<'_>, recv: &hir::Expr<'_>) { - if_chain! { - if let Some(method_def_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id); - if is_clone_like(cx, method_name, method_def_id); - let return_type = cx.typeck_results().expr_ty(expr); - let input_type = cx.typeck_results().expr_ty(recv); - let (input_type, ref_count) = peel_mid_ty_refs(input_type); - if !(ref_count > 0 && is_diag_trait_item(cx, method_def_id, sym::ToOwned)); - if let Some(ty_name) = input_type.ty_adt_def().map(|adt_def| cx.tcx.item_name(adt_def.did())); - if return_type == input_type; - if let Some(clone_trait) = cx.tcx.lang_items().clone_trait(); - if implements_trait(cx, return_type, clone_trait, &[]); - then { - let mut app = Applicability::MachineApplicable; - let recv_snip = snippet_with_context(cx, recv.span, expr.span.ctxt(), "..", &mut app).0; - span_lint_and_sugg( - cx, - IMPLICIT_CLONE, - expr.span, - &format!("implicitly cloning a `{ty_name}` by calling `{method_name}` on its dereferenced type"), - "consider using", - if ref_count > 1 { - format!("({}{recv_snip}).clone()", "*".repeat(ref_count - 1)) - } else { - format!("{recv_snip}.clone()") - }, - app, - ); - } + if let Some(method_def_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id) + && is_clone_like(cx, method_name, method_def_id) + && let return_type = cx.typeck_results().expr_ty(expr) + && let input_type = cx.typeck_results().expr_ty(recv) + && let (input_type, ref_count) = peel_mid_ty_refs(input_type) + && !(ref_count > 0 && is_diag_trait_item(cx, method_def_id, sym::ToOwned)) + && let Some(ty_name) = input_type.ty_adt_def().map(|adt_def| cx.tcx.item_name(adt_def.did())) + && return_type == input_type + && let Some(clone_trait) = cx.tcx.lang_items().clone_trait() + && implements_trait(cx, return_type, clone_trait, &[]) + { + let mut app = Applicability::MachineApplicable; + let recv_snip = snippet_with_context(cx, recv.span, expr.span.ctxt(), "..", &mut app).0; + span_lint_and_sugg( + cx, + IMPLICIT_CLONE, + expr.span, + &format!("implicitly cloning a `{ty_name}` by calling `{method_name}` on its dereferenced type"), + "consider using", + if ref_count > 1 { + format!("({}{recv_snip}).clone()", "*".repeat(ref_count - 1)) + } else { + format!("{recv_snip}.clone()") + }, + app, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/methods/inefficient_to_string.rs b/src/tools/clippy/clippy_lints/src/methods/inefficient_to_string.rs index 6686d42c9..efc3ddd20 100644 --- a/src/tools/clippy/clippy_lints/src/methods/inefficient_to_string.rs +++ b/src/tools/clippy/clippy_lints/src/methods/inefficient_to_string.rs @@ -1,7 +1,6 @@ use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::source::snippet_with_applicability; use clippy_utils::ty::{is_type_lang_item, walk_ptrs_ty_depth}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_lint::LateContext; @@ -18,37 +17,36 @@ pub fn check( receiver: &hir::Expr<'_>, args: &[hir::Expr<'_>], ) { - if_chain! { - if args.is_empty() && method_name == sym::to_string; - if let Some(to_string_meth_did) = cx.typeck_results().type_dependent_def_id(expr.hir_id); - if cx.tcx.is_diagnostic_item(sym::to_string_method, to_string_meth_did); - if let Some(args) = cx.typeck_results().node_args_opt(expr.hir_id); - let arg_ty = cx.typeck_results().expr_ty_adjusted(receiver); - let self_ty = args.type_at(0); - let (deref_self_ty, deref_count) = walk_ptrs_ty_depth(self_ty); - if deref_count >= 1; - if specializes_tostring(cx, deref_self_ty); - then { - span_lint_and_then( - cx, - INEFFICIENT_TO_STRING, - expr.span, - &format!("calling `to_string` on `{arg_ty}`"), - |diag| { - diag.help(format!( - "`{self_ty}` implements `ToString` through a slower blanket impl, but `{deref_self_ty}` has a fast specialization of `ToString`" - )); - let mut applicability = Applicability::MachineApplicable; - let arg_snippet = snippet_with_applicability(cx, receiver.span, "..", &mut applicability); - diag.span_suggestion( - expr.span, - "try dereferencing the receiver", - format!("({}{arg_snippet}).to_string()", "*".repeat(deref_count)), - applicability, - ); - }, - ); - } + if args.is_empty() + && method_name == sym::to_string + && let Some(to_string_meth_did) = cx.typeck_results().type_dependent_def_id(expr.hir_id) + && cx.tcx.is_diagnostic_item(sym::to_string_method, to_string_meth_did) + && let Some(args) = cx.typeck_results().node_args_opt(expr.hir_id) + && let arg_ty = cx.typeck_results().expr_ty_adjusted(receiver) + && let self_ty = args.type_at(0) + && let (deref_self_ty, deref_count) = walk_ptrs_ty_depth(self_ty) + && deref_count >= 1 + && specializes_tostring(cx, deref_self_ty) + { + span_lint_and_then( + cx, + INEFFICIENT_TO_STRING, + expr.span, + &format!("calling `to_string` on `{arg_ty}`"), + |diag| { + diag.help(format!( + "`{self_ty}` implements `ToString` through a slower blanket impl, but `{deref_self_ty}` has a fast specialization of `ToString`" + )); + let mut applicability = Applicability::MachineApplicable; + let arg_snippet = snippet_with_applicability(cx, receiver.span, "..", &mut applicability); + diag.span_suggestion( + expr.span, + "try dereferencing the receiver", + format!("({}{arg_snippet}).to_string()", "*".repeat(deref_count)), + applicability, + ); + }, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/methods/into_iter_on_ref.rs b/src/tools/clippy/clippy_lints/src/methods/into_iter_on_ref.rs index bbd964c10..80160d17c 100644 --- a/src/tools/clippy/clippy_lints/src/methods/into_iter_on_ref.rs +++ b/src/tools/clippy/clippy_lints/src/methods/into_iter_on_ref.rs @@ -1,13 +1,12 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::is_trait_method; use clippy_utils::ty::has_iter_method; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_lint::LateContext; use rustc_middle::ty::{self, Ty}; -use rustc_span::Span; use rustc_span::symbol::{sym, Symbol}; +use rustc_span::Span; use super::INTO_ITER_ON_REF; @@ -19,24 +18,20 @@ pub(super) fn check( receiver: &hir::Expr<'_>, ) { let self_ty = cx.typeck_results().expr_ty_adjusted(receiver); - if_chain! { - if let ty::Ref(..) = self_ty.kind(); - if method_name == sym::into_iter; - if is_trait_method(cx, expr, sym::IntoIterator); - if let Some((kind, method_name)) = ty_has_iter_method(cx, self_ty); - then { - span_lint_and_sugg( - cx, - INTO_ITER_ON_REF, - method_span, - &format!( - "this `.into_iter()` call is equivalent to `.{method_name}()` and will not consume the `{kind}`", - ), - "call directly", - method_name.to_string(), - Applicability::MachineApplicable, - ); - } + if let ty::Ref(..) = self_ty.kind() + && method_name == sym::into_iter + && is_trait_method(cx, expr, sym::IntoIterator) + && let Some((kind, method_name)) = ty_has_iter_method(cx, self_ty) + { + span_lint_and_sugg( + cx, + INTO_ITER_ON_REF, + method_span, + &format!("this `.into_iter()` call is equivalent to `.{method_name}()` and will not consume the `{kind}`",), + "call directly", + method_name.to_string(), + Applicability::MachineApplicable, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/methods/iter_cloned_collect.rs b/src/tools/clippy/clippy_lints/src/methods/iter_cloned_collect.rs index bde6f92b0..dd741cd43 100644 --- a/src/tools/clippy/clippy_lints/src/methods/iter_cloned_collect.rs +++ b/src/tools/clippy/clippy_lints/src/methods/iter_cloned_collect.rs @@ -1,7 +1,6 @@ use crate::methods::utils::derefs_to_slice; use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::ty::is_type_diagnostic_item; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_lint::LateContext; @@ -10,22 +9,21 @@ use rustc_span::sym; use super::ITER_CLONED_COLLECT; pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, method_name: &str, expr: &hir::Expr<'_>, recv: &'tcx hir::Expr<'_>) { - if_chain! { - if is_type_diagnostic_item(cx, cx.typeck_results().expr_ty(expr), sym::Vec); - if let Some(slice) = derefs_to_slice(cx, recv, cx.typeck_results().expr_ty(recv)); - if let Some(to_replace) = expr.span.trim_start(slice.span.source_callsite()); - - then { - span_lint_and_sugg( - cx, - ITER_CLONED_COLLECT, - to_replace, - &format!("called `iter().{method_name}().collect()` on a slice to create a `Vec`. Calling `to_vec()` is both faster and \ - more readable"), - "try", - ".to_vec()".to_string(), - Applicability::MachineApplicable, - ); - } + if is_type_diagnostic_item(cx, cx.typeck_results().expr_ty(expr), sym::Vec) + && let Some(slice) = derefs_to_slice(cx, recv, cx.typeck_results().expr_ty(recv)) + && let Some(to_replace) = expr.span.trim_start(slice.span.source_callsite()) + { + span_lint_and_sugg( + cx, + ITER_CLONED_COLLECT, + to_replace, + &format!( + "called `iter().{method_name}().collect()` on a slice to create a `Vec`. Calling `to_vec()` is both faster and \ + more readable" + ), + "try", + ".to_vec()".to_string(), + Applicability::MachineApplicable, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/methods/iter_kv_map.rs b/src/tools/clippy/clippy_lints/src/methods/iter_kv_map.rs index 625325d4c..e1b934d36 100644 --- a/src/tools/clippy/clippy_lints/src/methods/iter_kv_map.rs +++ b/src/tools/clippy/clippy_lints/src/methods/iter_kv_map.rs @@ -1,6 +1,7 @@ #![allow(unused_imports)] use super::ITER_KV_MAP; +use clippy_config::msrvs::{self, Msrv}; use clippy_utils::diagnostics::{multispan_sugg, span_lint_and_sugg, span_lint_and_then}; use clippy_utils::source::{snippet, snippet_with_applicability}; use clippy_utils::ty::is_type_diagnostic_item; @@ -21,65 +22,59 @@ pub(super) fn check<'tcx>( expr: &'tcx Expr<'tcx>, // .iter().map(|(_, v_| v)) recv: &'tcx Expr<'tcx>, // hashmap m_arg: &'tcx Expr<'tcx>, // |(_, v)| v + msrv: &Msrv, ) { - if_chain! { - if !expr.span.from_expansion(); - if let ExprKind::Closure(c) = m_arg.kind; - if let Body {params: [p], value: body_expr, coroutine_kind: _ } = cx.tcx.hir().body(c.body); - if let PatKind::Tuple([key_pat, val_pat], _) = p.pat.kind; - - let (replacement_kind, annotation, bound_ident) = match (&key_pat.kind, &val_pat.kind) { + if map_type == "into_iter" && !msrv.meets(msrvs::INTO_KEYS) { + return; + } + if !expr.span.from_expansion() + && let ExprKind::Closure(c) = m_arg.kind + && let Body { + params: [p], + value: body_expr, + coroutine_kind: _, + } = cx.tcx.hir().body(c.body) + && let PatKind::Tuple([key_pat, val_pat], _) = p.pat.kind + && let (replacement_kind, annotation, bound_ident) = match (&key_pat.kind, &val_pat.kind) { (key, PatKind::Binding(ann, _, value, _)) if pat_is_wild(cx, key, m_arg) => ("value", ann, value), (PatKind::Binding(ann, _, key, _), value) if pat_is_wild(cx, value, m_arg) => ("key", ann, key), _ => return, - }; - - let ty = cx.typeck_results().expr_ty(recv); - if is_type_diagnostic_item(cx, ty, sym::HashMap) || is_type_diagnostic_item(cx, ty, sym::BTreeMap); - - then { - let mut applicability = rustc_errors::Applicability::MachineApplicable; - let recv_snippet = snippet_with_applicability(cx, recv.span, "map", &mut applicability); - let into_prefix = if map_type == "into_iter" {"into_"} else {""}; - - if_chain! { - if let ExprKind::Path(rustc_hir::QPath::Resolved(_, path)) = body_expr.kind; - if let [local_ident] = path.segments; - if local_ident.ident.as_str() == bound_ident.as_str(); + } + && let ty = cx.typeck_results().expr_ty(recv) + && (is_type_diagnostic_item(cx, ty, sym::HashMap) || is_type_diagnostic_item(cx, ty, sym::BTreeMap)) + { + let mut applicability = rustc_errors::Applicability::MachineApplicable; + let recv_snippet = snippet_with_applicability(cx, recv.span, "map", &mut applicability); + let into_prefix = if map_type == "into_iter" { "into_" } else { "" }; - then { - span_lint_and_sugg( - cx, - ITER_KV_MAP, - expr.span, - &format!("iterating on a map's {replacement_kind}s"), - "try", - format!("{recv_snippet}.{into_prefix}{replacement_kind}s()"), - applicability, - ); - } else { - let ref_annotation = if annotation.0 == ByRef::Yes { - "ref " - } else { - "" - }; - let mut_annotation = if annotation.1 == Mutability::Mut { - "mut " - } else { - "" - }; - span_lint_and_sugg( - cx, - ITER_KV_MAP, - expr.span, - &format!("iterating on a map's {replacement_kind}s"), - "try", - format!("{recv_snippet}.{into_prefix}{replacement_kind}s().map(|{ref_annotation}{mut_annotation}{bound_ident}| {})", - snippet_with_applicability(cx, body_expr.span, "/* body */", &mut applicability)), - applicability, - ); - } - } + if let ExprKind::Path(rustc_hir::QPath::Resolved(_, path)) = body_expr.kind + && let [local_ident] = path.segments + && local_ident.ident.as_str() == bound_ident.as_str() + { + span_lint_and_sugg( + cx, + ITER_KV_MAP, + expr.span, + &format!("iterating on a map's {replacement_kind}s"), + "try", + format!("{recv_snippet}.{into_prefix}{replacement_kind}s()"), + applicability, + ); + } else { + let ref_annotation = if annotation.0 == ByRef::Yes { "ref " } else { "" }; + let mut_annotation = if annotation.1 == Mutability::Mut { "mut " } else { "" }; + span_lint_and_sugg( + cx, + ITER_KV_MAP, + expr.span, + &format!("iterating on a map's {replacement_kind}s"), + "try", + format!( + "{recv_snippet}.{into_prefix}{replacement_kind}s().map(|{ref_annotation}{mut_annotation}{bound_ident}| {})", + snippet_with_applicability(cx, body_expr.span, "/* body */", &mut applicability) + ), + applicability, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/methods/iter_next_slice.rs b/src/tools/clippy/clippy_lints/src/methods/iter_next_slice.rs index 8f885e9f7..fd4650e1e 100644 --- a/src/tools/clippy/clippy_lints/src/methods/iter_next_slice.rs +++ b/src/tools/clippy/clippy_lints/src/methods/iter_next_slice.rs @@ -3,7 +3,6 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet_with_applicability; use clippy_utils::ty::is_type_diagnostic_item; use clippy_utils::{get_parent_expr, higher}; -use if_chain::if_chain; use rustc_ast::ast; use rustc_errors::Applicability; use rustc_hir as hir; @@ -26,29 +25,36 @@ pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx hir::Expr<'_>, cal if derefs_to_slice(cx, caller_expr, cx.typeck_results().expr_ty(caller_expr)).is_some() { // caller is a Slice - if_chain! { - if let hir::ExprKind::Index(caller_var, index_expr, _) = &caller_expr.kind; - if let Some(higher::Range { start: Some(start_expr), end: None, limits: ast::RangeLimits::HalfOpen }) - = higher::Range::hir(index_expr); - if let hir::ExprKind::Lit(start_lit) = &start_expr.kind; - if let ast::LitKind::Int(start_idx, _) = start_lit.node; - then { - let mut applicability = Applicability::MachineApplicable; - let suggest = if start_idx == 0 { - format!("{}.first()", snippet_with_applicability(cx, caller_var.span, "..", &mut applicability)) - } else { - format!("{}.get({start_idx})", snippet_with_applicability(cx, caller_var.span, "..", &mut applicability)) - }; - span_lint_and_sugg( - cx, - ITER_NEXT_SLICE, - expr.span, - "using `.iter().next()` on a Slice without end index", - "try calling", - suggest, - applicability, - ); - } + if let hir::ExprKind::Index(caller_var, index_expr, _) = &caller_expr.kind + && let Some(higher::Range { + start: Some(start_expr), + end: None, + limits: ast::RangeLimits::HalfOpen, + }) = higher::Range::hir(index_expr) + && let hir::ExprKind::Lit(start_lit) = &start_expr.kind + && let ast::LitKind::Int(start_idx, _) = start_lit.node + { + let mut applicability = Applicability::MachineApplicable; + let suggest = if start_idx == 0 { + format!( + "{}.first()", + snippet_with_applicability(cx, caller_var.span, "..", &mut applicability) + ) + } else { + format!( + "{}.get({start_idx})", + snippet_with_applicability(cx, caller_var.span, "..", &mut applicability) + ) + }; + span_lint_and_sugg( + cx, + ITER_NEXT_SLICE, + expr.span, + "using `.iter().next()` on a Slice without end index", + "try calling", + suggest, + applicability, + ); } } else if is_vec_or_array(cx, caller_expr) { // caller is a Vec or an Array diff --git a/src/tools/clippy/clippy_lints/src/methods/iter_skip_next.rs b/src/tools/clippy/clippy_lints/src/methods/iter_skip_next.rs index 39af52141..d1215290d 100644 --- a/src/tools/clippy/clippy_lints/src/methods/iter_skip_next.rs +++ b/src/tools/clippy/clippy_lints/src/methods/iter_skip_next.rs @@ -19,18 +19,16 @@ pub(super) fn check(cx: &LateContext<'_>, expr: &hir::Expr<'_>, recv: &hir::Expr expr.span.trim_start(recv.span).unwrap(), "called `skip(..).next()` on an iterator", |diag| { - if_chain! { - if let Some(id) = path_to_local(recv); - if let Node::Pat(pat) = cx.tcx.hir().get(id); - if let PatKind::Binding(ann, _, _, _) = pat.kind; - if ann != BindingAnnotation::MUT; - then { - application = Applicability::Unspecified; - diag.span_help( - pat.span, - format!("for this change `{}` has to be mutable", snippet(cx, pat.span, "..")), - ); - } + if let Some(id) = path_to_local(recv) + && let Node::Pat(pat) = cx.tcx.hir_node(id) + && let PatKind::Binding(ann, _, _, _) = pat.kind + && ann != BindingAnnotation::MUT + { + application = Applicability::Unspecified; + diag.span_help( + pat.span, + format!("for this change `{}` has to be mutable", snippet(cx, pat.span, "..")), + ); } diag.span_suggestion( diff --git a/src/tools/clippy/clippy_lints/src/methods/join_absolute_paths.rs b/src/tools/clippy/clippy_lints/src/methods/join_absolute_paths.rs new file mode 100644 index 000000000..02f28779c --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/methods/join_absolute_paths.rs @@ -0,0 +1,52 @@ +use clippy_utils::diagnostics::span_lint_and_then; +use clippy_utils::expr_or_init; +use clippy_utils::source::snippet_opt; +use clippy_utils::ty::is_type_diagnostic_item; +use rustc_ast::ast::LitKind; +use rustc_errors::Applicability; +use rustc_hir::{Expr, ExprKind}; +use rustc_lint::LateContext; +use rustc_span::symbol::sym; +use rustc_span::Span; + +use super::JOIN_ABSOLUTE_PATHS; + +pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, recv: &'tcx Expr<'tcx>, join_arg: &'tcx Expr<'tcx>, expr_span: Span) { + let ty = cx.typeck_results().expr_ty(recv).peel_refs(); + if (is_type_diagnostic_item(cx, ty, sym::Path) || is_type_diagnostic_item(cx, ty, sym::PathBuf)) + && let ExprKind::Lit(spanned) = expr_or_init(cx, join_arg).kind + && let LitKind::Str(symbol, _) = spanned.node + && let sym_str = symbol.as_str() + && sym_str.starts_with(['/', '\\']) + { + span_lint_and_then( + cx, + JOIN_ABSOLUTE_PATHS, + join_arg.span, + "argument to `Path::join` starts with a path separator", + |diag| { + let arg_str = snippet_opt(cx, spanned.span).unwrap_or_else(|| "..".to_string()); + + let no_separator = if sym_str.starts_with('/') { + arg_str.replacen('/', "", 1) + } else { + arg_str.replacen('\\', "", 1) + }; + + diag.note("joining a path starting with separator will replace the path instead") + .span_suggestion( + spanned.span, + "if this is unintentional, try removing the starting separator", + no_separator, + Applicability::Unspecified, + ) + .span_suggestion( + expr_span, + "if this is intentional, try using `Path::new` instead", + format!("PathBuf::from({arg_str})"), + Applicability::Unspecified, + ); + }, + ); + } +} diff --git a/src/tools/clippy/clippy_lints/src/methods/manual_ok_or.rs b/src/tools/clippy/clippy_lints/src/methods/manual_ok_or.rs index 3031193e5..b1af0083e 100644 --- a/src/tools/clippy/clippy_lints/src/methods/manual_ok_or.rs +++ b/src/tools/clippy/clippy_lints/src/methods/manual_ok_or.rs @@ -2,7 +2,6 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::{indent_of, reindent_multiline, snippet_opt}; use clippy_utils::ty::is_type_diagnostic_item; use clippy_utils::{is_res_lang_ctor, path_res, path_to_local_id}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::LangItem::{ResultErr, ResultOk}; use rustc_hir::{Expr, ExprKind, PatKind}; @@ -18,30 +17,26 @@ pub(super) fn check<'tcx>( or_expr: &'tcx Expr<'_>, map_expr: &'tcx Expr<'_>, ) { - if_chain! { - if let Some(method_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id); - if let Some(impl_id) = cx.tcx.impl_of_method(method_id); - if is_type_diagnostic_item(cx, cx.tcx.type_of(impl_id).instantiate_identity(), sym::Option); - if let ExprKind::Call(err_path, [err_arg]) = or_expr.kind; - if is_res_lang_ctor(cx, path_res(cx, err_path), ResultErr); - if is_ok_wrapping(cx, map_expr); - if let Some(recv_snippet) = snippet_opt(cx, recv.span); - if let Some(err_arg_snippet) = snippet_opt(cx, err_arg.span); - if let Some(indent) = indent_of(cx, expr.span); - then { - let reindented_err_arg_snippet = reindent_multiline(err_arg_snippet.into(), true, Some(indent + 4)); - span_lint_and_sugg( - cx, - MANUAL_OK_OR, - expr.span, - "this pattern reimplements `Option::ok_or`", - "replace with", - format!( - "{recv_snippet}.ok_or({reindented_err_arg_snippet})" - ), - Applicability::MachineApplicable, - ); - } + if let Some(method_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id) + && let Some(impl_id) = cx.tcx.impl_of_method(method_id) + && is_type_diagnostic_item(cx, cx.tcx.type_of(impl_id).instantiate_identity(), sym::Option) + && let ExprKind::Call(err_path, [err_arg]) = or_expr.kind + && is_res_lang_ctor(cx, path_res(cx, err_path), ResultErr) + && is_ok_wrapping(cx, map_expr) + && let Some(recv_snippet) = snippet_opt(cx, recv.span) + && let Some(err_arg_snippet) = snippet_opt(cx, err_arg.span) + && let Some(indent) = indent_of(cx, expr.span) + { + let reindented_err_arg_snippet = reindent_multiline(err_arg_snippet.into(), true, Some(indent + 4)); + span_lint_and_sugg( + cx, + MANUAL_OK_OR, + expr.span, + "this pattern reimplements `Option::ok_or`", + "replace with", + format!("{recv_snippet}.ok_or({reindented_err_arg_snippet})"), + Applicability::MachineApplicable, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/methods/manual_saturating_arithmetic.rs b/src/tools/clippy/clippy_lints/src/methods/manual_saturating_arithmetic.rs index 540425eef..04bdbc1ea 100644 --- a/src/tools/clippy/clippy_lints/src/methods/manual_saturating_arithmetic.rs +++ b/src/tools/clippy/clippy_lints/src/methods/manual_saturating_arithmetic.rs @@ -1,7 +1,6 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet_with_applicability; use clippy_utils::{match_def_path, path_def_id}; -use if_chain::if_chain; use rustc_ast::ast; use rustc_errors::Applicability; use rustc_hir as hir; @@ -69,16 +68,14 @@ enum MinMax { fn is_min_or_max(cx: &LateContext<'_>, expr: &hir::Expr<'_>) -> Option<MinMax> { // `T::max_value()` `T::min_value()` inherent methods - if_chain! { - if let hir::ExprKind::Call(func, args) = &expr.kind; - if args.is_empty(); - if let hir::ExprKind::Path(hir::QPath::TypeRelative(_, segment)) = &func.kind; - then { - match segment.ident.as_str() { - "max_value" => return Some(MinMax::Max), - "min_value" => return Some(MinMax::Min), - _ => {} - } + if let hir::ExprKind::Call(func, args) = &expr.kind + && args.is_empty() + && let hir::ExprKind::Path(hir::QPath::TypeRelative(_, segment)) = &func.kind + { + match segment.ident.as_str() { + "max_value" => return Some(MinMax::Max), + "min_value" => return Some(MinMax::Min), + _ => {}, } } diff --git a/src/tools/clippy/clippy_lints/src/methods/manual_str_repeat.rs b/src/tools/clippy/clippy_lints/src/methods/manual_str_repeat.rs index ab13d30d8..61e74369c 100644 --- a/src/tools/clippy/clippy_lints/src/methods/manual_str_repeat.rs +++ b/src/tools/clippy/clippy_lints/src/methods/manual_str_repeat.rs @@ -3,7 +3,6 @@ use clippy_utils::is_path_diagnostic_item; use clippy_utils::source::{snippet_with_applicability, snippet_with_context}; use clippy_utils::sugg::Sugg; use clippy_utils::ty::{is_type_diagnostic_item, is_type_lang_item}; -use if_chain::if_chain; use rustc_ast::LitKind; use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind, LangItem}; @@ -55,43 +54,42 @@ pub(super) fn check( take_self_arg: &Expr<'_>, take_arg: &Expr<'_>, ) { - if_chain! { - if let ExprKind::Call(repeat_fn, [repeat_arg]) = take_self_arg.kind; - if is_path_diagnostic_item(cx, repeat_fn, sym::iter_repeat); - if is_type_lang_item(cx, cx.typeck_results().expr_ty(collect_expr), LangItem::String); - if let Some(take_id) = cx.typeck_results().type_dependent_def_id(take_expr.hir_id); - if let Some(iter_trait_id) = cx.tcx.get_diagnostic_item(sym::Iterator); - if cx.tcx.trait_of_item(take_id) == Some(iter_trait_id); - if let Some(repeat_kind) = parse_repeat_arg(cx, repeat_arg); - let ctxt = collect_expr.span.ctxt(); - if ctxt == take_expr.span.ctxt(); - if ctxt == take_self_arg.span.ctxt(); - then { - let mut app = Applicability::MachineApplicable; - let count_snip = snippet_with_context(cx, take_arg.span, ctxt, "..", &mut app).0; + if let ExprKind::Call(repeat_fn, [repeat_arg]) = take_self_arg.kind + && is_path_diagnostic_item(cx, repeat_fn, sym::iter_repeat) + && is_type_lang_item(cx, cx.typeck_results().expr_ty(collect_expr), LangItem::String) + && let Some(take_id) = cx.typeck_results().type_dependent_def_id(take_expr.hir_id) + && let Some(iter_trait_id) = cx.tcx.get_diagnostic_item(sym::Iterator) + && cx.tcx.trait_of_item(take_id) == Some(iter_trait_id) + && let Some(repeat_kind) = parse_repeat_arg(cx, repeat_arg) + && let ctxt = collect_expr.span.ctxt() + && ctxt == take_expr.span.ctxt() + && ctxt == take_self_arg.span.ctxt() + { + let mut app = Applicability::MachineApplicable; + let count_snip = snippet_with_context(cx, take_arg.span, ctxt, "..", &mut app).0; - let val_str = match repeat_kind { - RepeatKind::Char(_) if repeat_arg.span.ctxt() != ctxt => return, - RepeatKind::Char('\'') => r#""'""#.into(), - RepeatKind::Char('"') => r#""\"""#.into(), - RepeatKind::Char(_) => - match snippet_with_applicability(cx, repeat_arg.span, "..", &mut app) { - Cow::Owned(s) => Cow::Owned(format!("\"{}\"", &s[1..s.len() - 1])), - s @ Cow::Borrowed(_) => s, - }, - RepeatKind::String => - Sugg::hir_with_context(cx, repeat_arg, ctxt, "..", &mut app).maybe_par().to_string().into(), - }; + let val_str = match repeat_kind { + RepeatKind::Char(_) if repeat_arg.span.ctxt() != ctxt => return, + RepeatKind::Char('\'') => r#""'""#.into(), + RepeatKind::Char('"') => r#""\"""#.into(), + RepeatKind::Char(_) => match snippet_with_applicability(cx, repeat_arg.span, "..", &mut app) { + Cow::Owned(s) => Cow::Owned(format!("\"{}\"", &s[1..s.len() - 1])), + s @ Cow::Borrowed(_) => s, + }, + RepeatKind::String => Sugg::hir_with_context(cx, repeat_arg, ctxt, "..", &mut app) + .maybe_par() + .to_string() + .into(), + }; - span_lint_and_sugg( - cx, - MANUAL_STR_REPEAT, - collect_expr.span, - "manual implementation of `str::repeat` using iterators", - "try", - format!("{val_str}.repeat({count_snip})"), - app - ) - } + span_lint_and_sugg( + cx, + MANUAL_STR_REPEAT, + collect_expr.span, + "manual implementation of `str::repeat` using iterators", + "try", + format!("{val_str}.repeat({count_snip})"), + app, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/methods/manual_try_fold.rs b/src/tools/clippy/clippy_lints/src/methods/manual_try_fold.rs index 51145afda..f93edded7 100644 --- a/src/tools/clippy/clippy_lints/src/methods/manual_try_fold.rs +++ b/src/tools/clippy/clippy_lints/src/methods/manual_try_fold.rs @@ -1,14 +1,14 @@ use clippy_config::msrvs::{self, Msrv}; use clippy_utils::diagnostics::span_lint_and_sugg; -use clippy_utils::is_from_proc_macro; use clippy_utils::source::snippet_opt; use clippy_utils::ty::implements_trait; +use clippy_utils::{is_from_proc_macro, is_trait_method}; use rustc_errors::Applicability; use rustc_hir::def::{DefKind, Res}; use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_span::Span; +use rustc_span::{sym, Span}; use super::MANUAL_TRY_FOLD; @@ -22,6 +22,7 @@ pub(super) fn check<'tcx>( ) { if !in_external_macro(cx.sess(), fold_span) && msrv.meets(msrvs::ITERATOR_TRY_FOLD) + && is_trait_method(cx, expr, sym::Iterator) && let init_ty = cx.typeck_results().expr_ty(init) && let Some(try_trait) = cx.tcx.lang_items().try_trait() && implements_trait(cx, init_ty, try_trait, &[]) diff --git a/src/tools/clippy/clippy_lints/src/methods/map_clone.rs b/src/tools/clippy/clippy_lints/src/methods/map_clone.rs index e0f8cb1b9..cc6eeaa86 100644 --- a/src/tools/clippy/clippy_lints/src/methods/map_clone.rs +++ b/src/tools/clippy/clippy_lints/src/methods/map_clone.rs @@ -3,7 +3,6 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet_with_applicability; use clippy_utils::ty::{is_copy, is_type_diagnostic_item}; use clippy_utils::{is_diag_trait_item, peel_blocks}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_lint::LateContext; @@ -16,57 +15,55 @@ use rustc_span::{sym, Span}; use super::MAP_CLONE; pub(super) fn check(cx: &LateContext<'_>, e: &hir::Expr<'_>, recv: &hir::Expr<'_>, arg: &hir::Expr<'_>, msrv: &Msrv) { - if_chain! { - if let Some(method_id) = cx.typeck_results().type_dependent_def_id(e.hir_id); - if cx.tcx.impl_of_method(method_id) - .map_or(false, |id| is_type_diagnostic_item(cx, cx.tcx.type_of(id).instantiate_identity(), sym::Option)) - || is_diag_trait_item(cx, method_id, sym::Iterator); - if let hir::ExprKind::Closure(&hir::Closure{ body, .. }) = arg.kind; - then { - let closure_body = cx.tcx.hir().body(body); - let closure_expr = peel_blocks(closure_body.value); - match closure_body.params[0].pat.kind { - hir::PatKind::Ref(inner, hir::Mutability::Not) => if let hir::PatKind::Binding( - hir::BindingAnnotation::NONE, .., name, None - ) = inner.kind { + if let Some(method_id) = cx.typeck_results().type_dependent_def_id(e.hir_id) + && (cx.tcx.impl_of_method(method_id).map_or(false, |id| { + is_type_diagnostic_item(cx, cx.tcx.type_of(id).instantiate_identity(), sym::Option) + }) || is_diag_trait_item(cx, method_id, sym::Iterator)) + && let hir::ExprKind::Closure(&hir::Closure { body, .. }) = arg.kind + { + let closure_body = cx.tcx.hir().body(body); + let closure_expr = peel_blocks(closure_body.value); + match closure_body.params[0].pat.kind { + hir::PatKind::Ref(inner, hir::Mutability::Not) => { + if let hir::PatKind::Binding(hir::BindingAnnotation::NONE, .., name, None) = inner.kind { if ident_eq(name, closure_expr) { lint_explicit_closure(cx, e.span, recv.span, true, msrv); } - }, - hir::PatKind::Binding(hir::BindingAnnotation::NONE, .., name, None) => { - match closure_expr.kind { - hir::ExprKind::Unary(hir::UnOp::Deref, inner) => { - if ident_eq(name, inner) { - if let ty::Ref(.., Mutability::Not) = cx.typeck_results().expr_ty(inner).kind() { - lint_explicit_closure(cx, e.span, recv.span, true, msrv); - } + } + }, + hir::PatKind::Binding(hir::BindingAnnotation::NONE, .., name, None) => { + match closure_expr.kind { + hir::ExprKind::Unary(hir::UnOp::Deref, inner) => { + if ident_eq(name, inner) { + if let ty::Ref(.., Mutability::Not) = cx.typeck_results().expr_ty(inner).kind() { + lint_explicit_closure(cx, e.span, recv.span, true, msrv); } - }, - hir::ExprKind::MethodCall(method, obj, [], _) => if_chain! { - if ident_eq(name, obj) && method.ident.name == sym::clone; - if let Some(fn_id) = cx.typeck_results().type_dependent_def_id(closure_expr.hir_id); - if let Some(trait_id) = cx.tcx.trait_of_item(fn_id); - if cx.tcx.lang_items().clone_trait().map_or(false, |id| id == trait_id); - // no autoderefs - if !cx.typeck_results().expr_adjustments(obj).iter() - .any(|a| matches!(a.kind, Adjust::Deref(Some(..)))); - then { - let obj_ty = cx.typeck_results().expr_ty(obj); - if let ty::Ref(_, ty, mutability) = obj_ty.kind() { - if matches!(mutability, Mutability::Not) { - let copy = is_copy(cx, *ty); - lint_explicit_closure(cx, e.span, recv.span, copy, msrv); - } - } else { - lint_needless_cloning(cx, e.span, recv.span); + } + }, + hir::ExprKind::MethodCall(method, obj, [], _) => { + if ident_eq(name, obj) && method.ident.name == sym::clone + && let Some(fn_id) = cx.typeck_results().type_dependent_def_id(closure_expr.hir_id) + && let Some(trait_id) = cx.tcx.trait_of_item(fn_id) + && cx.tcx.lang_items().clone_trait().map_or(false, |id| id == trait_id) + // no autoderefs + && !cx.typeck_results().expr_adjustments(obj).iter() + .any(|a| matches!(a.kind, Adjust::Deref(Some(..)))) + { + let obj_ty = cx.typeck_results().expr_ty(obj); + if let ty::Ref(_, ty, mutability) = obj_ty.kind() { + if matches!(mutability, Mutability::Not) { + let copy = is_copy(cx, *ty); + lint_explicit_closure(cx, e.span, recv.span, copy, msrv); } + } else { + lint_needless_cloning(cx, e.span, recv.span); } - }, - _ => {}, - } - }, - _ => {}, - } + } + }, + _ => {}, + } + }, + _ => {}, } } } diff --git a/src/tools/clippy/clippy_lints/src/methods/map_collect_result_unit.rs b/src/tools/clippy/clippy_lints/src/methods/map_collect_result_unit.rs index 01cdd02e6..e944eac91 100644 --- a/src/tools/clippy/clippy_lints/src/methods/map_collect_result_unit.rs +++ b/src/tools/clippy/clippy_lints/src/methods/map_collect_result_unit.rs @@ -1,7 +1,6 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet; use clippy_utils::ty::is_type_diagnostic_item; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_lint::LateContext; @@ -13,26 +12,24 @@ use super::MAP_COLLECT_RESULT_UNIT; pub(super) fn check(cx: &LateContext<'_>, expr: &hir::Expr<'_>, iter: &hir::Expr<'_>, map_fn: &hir::Expr<'_>) { // return of collect `Result<(),_>` let collect_ret_ty = cx.typeck_results().expr_ty(expr); - if_chain! { - if is_type_diagnostic_item(cx, collect_ret_ty, sym::Result); - if let ty::Adt(_, args) = collect_ret_ty.kind(); - if let Some(result_t) = args.types().next(); - if result_t.is_unit(); - // get parts for snippet - then { - span_lint_and_sugg( - cx, - MAP_COLLECT_RESULT_UNIT, - expr.span, - "`.map().collect()` can be replaced with `.try_for_each()`", - "try", - format!( - "{}.try_for_each({})", - snippet(cx, iter.span, ".."), - snippet(cx, map_fn.span, "..") - ), - Applicability::MachineApplicable, - ); - } + if is_type_diagnostic_item(cx, collect_ret_ty, sym::Result) + && let ty::Adt(_, args) = collect_ret_ty.kind() + && let Some(result_t) = args.types().next() + && result_t.is_unit() + // get parts for snippet + { + span_lint_and_sugg( + cx, + MAP_COLLECT_RESULT_UNIT, + expr.span, + "`.map().collect()` can be replaced with `.try_for_each()`", + "try", + format!( + "{}.try_for_each({})", + snippet(cx, iter.span, ".."), + snippet(cx, map_fn.span, "..") + ), + Applicability::MachineApplicable, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/methods/map_flatten.rs b/src/tools/clippy/clippy_lints/src/methods/map_flatten.rs index e74a76455..26ef0d10f 100644 --- a/src/tools/clippy/clippy_lints/src/methods/map_flatten.rs +++ b/src/tools/clippy/clippy_lints/src/methods/map_flatten.rs @@ -63,7 +63,7 @@ fn is_map_to_option(cx: &LateContext<'_>, map_arg: &Expr<'_>) -> bool { ty::Closure(_, args) => args.as_closure().sig(), _ => map_closure_ty.fn_sig(cx.tcx), }; - let map_closure_return_ty = cx.tcx.erase_late_bound_regions(map_closure_sig.output()); + let map_closure_return_ty = cx.tcx.instantiate_bound_regions_with_erased(map_closure_sig.output()); is_type_diagnostic_item(cx, map_closure_return_ty, sym::Option) }, _ => false, diff --git a/src/tools/clippy/clippy_lints/src/methods/map_identity.rs b/src/tools/clippy/clippy_lints/src/methods/map_identity.rs index bcfd0de8e..6da9a87f5 100644 --- a/src/tools/clippy/clippy_lints/src/methods/map_identity.rs +++ b/src/tools/clippy/clippy_lints/src/methods/map_identity.rs @@ -18,22 +18,20 @@ pub(super) fn check( ) { let caller_ty = cx.typeck_results().expr_ty(caller); - if_chain! { - if is_trait_method(cx, expr, sym::Iterator) - || is_type_diagnostic_item(cx, caller_ty, sym::Result) - || is_type_diagnostic_item(cx, caller_ty, sym::Option); - if is_expr_untyped_identity_function(cx, map_arg); - if let Some(sugg_span) = expr.span.trim_start(caller.span); - then { - span_lint_and_sugg( - cx, - MAP_IDENTITY, - sugg_span, - "unnecessary map of the identity function", - &format!("remove the call to `{name}`"), - String::new(), - Applicability::MachineApplicable, - ) - } + if (is_trait_method(cx, expr, sym::Iterator) + || is_type_diagnostic_item(cx, caller_ty, sym::Result) + || is_type_diagnostic_item(cx, caller_ty, sym::Option)) + && is_expr_untyped_identity_function(cx, map_arg) + && let Some(sugg_span) = expr.span.trim_start(caller.span) + { + span_lint_and_sugg( + cx, + MAP_IDENTITY, + sugg_span, + "unnecessary map of the identity function", + &format!("remove the call to `{name}`"), + String::new(), + Applicability::MachineApplicable, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/methods/map_unwrap_or.rs b/src/tools/clippy/clippy_lints/src/methods/map_unwrap_or.rs index cb81b3919..52ea584a2 100644 --- a/src/tools/clippy/clippy_lints/src/methods/map_unwrap_or.rs +++ b/src/tools/clippy/clippy_lints/src/methods/map_unwrap_or.rs @@ -44,11 +44,9 @@ pub(super) fn check<'tcx>( // lint message let msg = if is_option { - "called `map(<f>).unwrap_or_else(<g>)` on an `Option` value. This can be done more directly by calling \ - `map_or_else(<g>, <f>)` instead" + "called `map(<f>).unwrap_or_else(<g>)` on an `Option` value" } else { - "called `map(<f>).unwrap_or_else(<g>)` on a `Result` value. This can be done more directly by calling \ - `.map_or_else(<g>, <f>)` instead" + "called `map(<f>).unwrap_or_else(<g>)` on a `Result` value" }; // get snippets for args to map() and unwrap_or_else() let map_snippet = snippet(cx, map_arg.span, ".."); diff --git a/src/tools/clippy/clippy_lints/src/methods/mod.rs b/src/tools/clippy/clippy_lints/src/methods/mod.rs index a71a136eb..b4f60ffad 100644 --- a/src/tools/clippy/clippy_lints/src/methods/mod.rs +++ b/src/tools/clippy/clippy_lints/src/methods/mod.rs @@ -49,6 +49,7 @@ mod iter_skip_next; mod iter_skip_zero; mod iter_with_drain; mod iterator_step_by_zero; +mod join_absolute_paths; mod manual_next_back; mod manual_ok_or; mod manual_saturating_arithmetic; @@ -69,6 +70,7 @@ mod obfuscated_if_else; mod ok_expect; mod open_options; mod option_as_ref_deref; +mod option_map_or_err_ok; mod option_map_or_none; mod option_map_unwrap_or; mod or_fun_call; @@ -80,6 +82,7 @@ mod read_line_without_trim; mod readonly_write_lock; mod redundant_as_str; mod repeat_once; +mod result_map_or_else_none; mod search_is_some; mod seek_from_current; mod seek_to_start_instead_of_rewind; @@ -123,7 +126,6 @@ use clippy_utils::consts::{constant, Constant}; use clippy_utils::diagnostics::{span_lint, span_lint_and_help}; use clippy_utils::ty::{contains_ty_adt_constructor_opaque, implements_trait, is_copy, is_type_diagnostic_item}; use clippy_utils::{contains_return, is_bool, is_trait_method, iter_input_pats, peel_blocks, return_ty}; -use if_chain::if_chain; pub use path_ends_with_ext::DEFAULT_ALLOWED_DOTFILES; use rustc_data_structures::fx::FxHashSet; use rustc_hir as hir; @@ -131,7 +133,7 @@ use rustc_hir::{Expr, ExprKind, Node, Stmt, StmtKind, TraitItem, TraitItemKind}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; use rustc_middle::ty::{self, TraitRef, Ty}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::{sym, Span}; declare_clippy_lint! { @@ -3610,7 +3612,7 @@ declare_clippy_lint! { declare_clippy_lint! { /// ### What it does - /// Checks for usage of `as_str()` on a `String`` chained with a method available on the `String` itself. + /// Checks for usage of `as_str()` on a `String` chained with a method available on the `String` itself. /// /// ### Why is this bad? /// The `as_str()` conversion is pointless and can be removed for simplicity and cleanliness. @@ -3619,14 +3621,16 @@ declare_clippy_lint! { /// ```no_run /// # #![allow(unused)] /// let owned_string = "This is a string".to_owned(); - /// owned_string.as_str().as_bytes(); + /// owned_string.as_str().as_bytes() + /// # ; /// ``` /// /// Use instead: /// ```no_run /// # #![allow(unused)] /// let owned_string = "This is a string".to_owned(); - /// owned_string.as_bytes(); + /// owned_string.as_bytes() + /// # ; /// ``` #[clippy::version = "1.74.0"] pub REDUNDANT_AS_STR, @@ -3683,6 +3687,71 @@ declare_clippy_lint! { "calling the `try_from` and `try_into` trait methods when `From`/`Into` is implemented" } +declare_clippy_lint! { + /// ### What it does + /// Checks for calls to `Path::join` that start with a path separator (`\\` or `/`). + /// + /// ### Why is this bad? + /// If the argument to `Path::join` starts with a separator, it will overwrite + /// the original path. If this is intentional, prefer using `Path::new` instead. + /// + /// Note the behavior is platform dependent. A leading `\\` will be accepted + /// on unix systems as part of the file name + /// + /// See [`Path::join`](https://doc.rust-lang.org/std/path/struct.Path.html#method.join) + /// + /// ### Example + /// ```rust + /// # use std::path::{Path, PathBuf}; + /// let path = Path::new("/bin"); + /// let joined_path = path.join("/sh"); + /// assert_eq!(joined_path, PathBuf::from("/sh")); + /// ``` + /// + /// Use instead; + /// ```rust + /// # use std::path::{Path, PathBuf}; + /// let path = Path::new("/bin"); + /// + /// // If this was unintentional, remove the leading separator + /// let joined_path = path.join("sh"); + /// assert_eq!(joined_path, PathBuf::from("/bin/sh")); + /// + /// // If this was intentional, create a new path instead + /// let new = Path::new("/sh"); + /// assert_eq!(new, PathBuf::from("/sh")); + /// ``` + #[clippy::version = "1.76.0"] + pub JOIN_ABSOLUTE_PATHS, + suspicious, + "calls to `Path::join` which will overwrite the original path" +} + +declare_clippy_lint! { + /// ### What it does + /// Checks for usage of `_.map_or(Err(_), Ok)`. + /// + /// ### Why is this bad? + /// Readability, this can be written more concisely as + /// `_.ok_or(_)`. + /// + /// ### Example + /// ```no_run + /// # let opt = Some(1); + /// opt.map_or(Err("error"), Ok); + /// ``` + /// + /// Use instead: + /// ```no_run + /// # let opt = Some(1); + /// opt.ok_or("error"); + /// ``` + #[clippy::version = "1.76.0"] + pub OPTION_MAP_OR_ERR_OK, + style, + "using `Option.map_or(Err(_), Ok)`, which is more succinctly expressed as `Option.ok_or(_)`" +} + pub struct Methods { avoid_breaking_exported_api: bool, msrv: Msrv, @@ -3698,8 +3767,10 @@ impl Methods { msrv: Msrv, allow_expect_in_tests: bool, allow_unwrap_in_tests: bool, - allowed_dotfiles: FxHashSet<String>, + mut allowed_dotfiles: FxHashSet<String>, ) -> Self { + allowed_dotfiles.extend(DEFAULT_ALLOWED_DOTFILES.iter().map(ToString::to_string)); + Self { avoid_breaking_exported_api, msrv, @@ -3830,10 +3901,12 @@ impl_lint_pass!(Methods => [ REDUNDANT_AS_STR, WAKER_CLONE_WAKE, UNNECESSARY_FALLIBLE_CONVERSIONS, + JOIN_ABSOLUTE_PATHS, + OPTION_MAP_OR_ERR_OK, ]); /// Extracts a method call name, args, and `Span` of the method name. -fn method_call<'tcx>( +pub fn method_call<'tcx>( recv: &'tcx hir::Expr<'tcx>, ) -> Option<(&'tcx str, &'tcx hir::Expr<'tcx>, &'tcx [hir::Expr<'tcx>], Span, Span)> { if let ExprKind::MethodCall(path, receiver, args, call_span) = recv.kind { @@ -3896,7 +3969,7 @@ impl<'tcx> LateLintPass<'tcx> for Methods { let implements_trait = matches!(item.kind, hir::ItemKind::Impl(hir::Impl { of_trait: Some(_), .. })); if let hir::ImplItemKind::Fn(ref sig, id) = impl_item.kind { let method_sig = cx.tcx.fn_sig(impl_item.owner_id).instantiate_identity(); - let method_sig = cx.tcx.erase_late_bound_regions(method_sig); + let method_sig = cx.tcx.instantiate_bound_regions_with_erased(method_sig); let first_arg_ty_opt = method_sig.inputs().iter().next().copied(); // if this impl block implements a trait, lint in trait definition instead if !implements_trait && cx.effective_visibilities.is_exported(impl_item.owner_id.def_id) { @@ -3977,44 +4050,41 @@ impl<'tcx> LateLintPass<'tcx> for Methods { return; } - if_chain! { - if let TraitItemKind::Fn(ref sig, _) = item.kind; - if sig.decl.implicit_self.has_implicit_self(); - if let Some(first_arg_hir_ty) = sig.decl.inputs.first(); - if let Some(&first_arg_ty) = cx.tcx.fn_sig(item.owner_id) + if let TraitItemKind::Fn(ref sig, _) = item.kind + && sig.decl.implicit_self.has_implicit_self() + && let Some(first_arg_hir_ty) = sig.decl.inputs.first() + && let Some(&first_arg_ty) = cx + .tcx + .fn_sig(item.owner_id) .instantiate_identity() .inputs() .skip_binder() - .first(); - then { - let self_ty = TraitRef::identity(cx.tcx, item.owner_id.to_def_id()).self_ty(); - wrong_self_convention::check( - cx, - item.ident.name.as_str(), - self_ty, - first_arg_ty, - first_arg_hir_ty.span, - false, - true, - ); - } - } - - if_chain! { - if item.ident.name == sym::new; - if let TraitItemKind::Fn(_, _) = item.kind; - let ret_ty = return_ty(cx, item.owner_id); + .first() + { let self_ty = TraitRef::identity(cx.tcx, item.owner_id.to_def_id()).self_ty(); - if !ret_ty.contains(self_ty); + wrong_self_convention::check( + cx, + item.ident.name.as_str(), + self_ty, + first_arg_ty, + first_arg_hir_ty.span, + false, + true, + ); + } - then { - span_lint( - cx, - NEW_RET_NO_SELF, - item.span, - "methods called `new` usually return `Self`", - ); - } + if item.ident.name == sym::new + && let TraitItemKind::Fn(_, _) = item.kind + && let ret_ty = return_ty(cx, item.owner_id) + && let self_ty = TraitRef::identity(cx.tcx, item.owner_id.to_def_id()).self_ty() + && !ret_ty.contains(self_ty) + { + span_lint( + cx, + NEW_RET_NO_SELF, + item.span, + "methods called `new` usually return `Self`", + ); } } @@ -4235,6 +4305,8 @@ impl Methods { ("join", [join_arg]) => { if let Some(("collect", _, _, span, _)) = method_call(recv) { unnecessary_join::check(cx, expr, recv, join_arg, span); + } else { + join_absolute_paths::check(cx, recv, join_arg, expr.span); } }, ("last", []) => { @@ -4257,7 +4329,7 @@ impl Methods { map_clone::check(cx, expr, recv, m_arg, &self.msrv); match method_call(recv) { Some((map_name @ ("iter" | "into_iter"), recv2, _, _, _)) => { - iter_kv_map::check(cx, map_name, expr, recv2, m_arg); + iter_kv_map::check(cx, map_name, expr, recv2, m_arg, &self.msrv); }, Some(("cloned", recv2, [], _, _)) => iter_overeager_cloned::check( cx, @@ -4290,6 +4362,10 @@ impl Methods { ("map_or", [def, map]) => { option_map_or_none::check(cx, expr, recv, def, map); manual_ok_or::check(cx, expr, recv, def, map); + option_map_or_err_ok::check(cx, expr, recv, def, map); + }, + ("map_or_else", [def, map]) => { + result_map_or_else_none::check(cx, expr, recv, def, map); }, ("next", []) => { if let Some((name2, recv2, args2, _, _)) = method_call(recv) { diff --git a/src/tools/clippy/clippy_lints/src/methods/mut_mutex_lock.rs b/src/tools/clippy/clippy_lints/src/methods/mut_mutex_lock.rs index 2855e23bf..1a0fce287 100644 --- a/src/tools/clippy/clippy_lints/src/methods/mut_mutex_lock.rs +++ b/src/tools/clippy/clippy_lints/src/methods/mut_mutex_lock.rs @@ -1,7 +1,6 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::expr_custom_deref_adjustment; use clippy_utils::ty::is_type_diagnostic_item; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{Expr, Mutability}; use rustc_lint::LateContext; @@ -11,22 +10,20 @@ use rustc_span::{sym, Span}; use super::MUT_MUTEX_LOCK; pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, ex: &'tcx Expr<'tcx>, recv: &'tcx Expr<'tcx>, name_span: Span) { - if_chain! { - if matches!(expr_custom_deref_adjustment(cx, recv), None | Some(Mutability::Mut)); - if let ty::Ref(_, _, Mutability::Mut) = cx.typeck_results().expr_ty(recv).kind(); - if let Some(method_id) = cx.typeck_results().type_dependent_def_id(ex.hir_id); - if let Some(impl_id) = cx.tcx.impl_of_method(method_id); - if is_type_diagnostic_item(cx, cx.tcx.type_of(impl_id).instantiate_identity(), sym::Mutex); - then { - span_lint_and_sugg( - cx, - MUT_MUTEX_LOCK, - name_span, - "calling `&mut Mutex::lock` unnecessarily locks an exclusive (mutable) reference", - "change this to", - "get_mut".to_owned(), - Applicability::MaybeIncorrect, - ); - } + if matches!(expr_custom_deref_adjustment(cx, recv), None | Some(Mutability::Mut)) + && let ty::Ref(_, _, Mutability::Mut) = cx.typeck_results().expr_ty(recv).kind() + && let Some(method_id) = cx.typeck_results().type_dependent_def_id(ex.hir_id) + && let Some(impl_id) = cx.tcx.impl_of_method(method_id) + && is_type_diagnostic_item(cx, cx.tcx.type_of(impl_id).instantiate_identity(), sym::Mutex) + { + span_lint_and_sugg( + cx, + MUT_MUTEX_LOCK, + name_span, + "calling `&mut Mutex::lock` unnecessarily locks an exclusive (mutable) reference", + "change this to", + "get_mut".to_owned(), + Applicability::MaybeIncorrect, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/methods/needless_collect.rs b/src/tools/clippy/clippy_lints/src/methods/needless_collect.rs index 2ef71be32..293b4981c 100644 --- a/src/tools/clippy/clippy_lints/src/methods/needless_collect.rs +++ b/src/tools/clippy/clippy_lints/src/methods/needless_collect.rs @@ -225,7 +225,10 @@ fn is_contains_sig(cx: &LateContext<'_>, call_id: HirId, iter_expr: &Expr<'_>) - && let sig = cx.tcx.fn_sig(id).instantiate_identity() && sig.skip_binder().output().is_bool() && let [_, search_ty] = *sig.skip_binder().inputs() - && let ty::Ref(_, search_ty, Mutability::Not) = *cx.tcx.erase_late_bound_regions(sig.rebind(search_ty)).kind() + && let ty::Ref(_, search_ty, Mutability::Not) = *cx + .tcx + .instantiate_bound_regions_with_erased(sig.rebind(search_ty)) + .kind() && let Some(iter_trait) = cx.tcx.get_diagnostic_item(sym::Iterator) && let Some(iter_item) = cx.tcx.associated_items(iter_trait).find_by_name_and_kind( cx.tcx, diff --git a/src/tools/clippy/clippy_lints/src/methods/no_effect_replace.rs b/src/tools/clippy/clippy_lints/src/methods/no_effect_replace.rs index 01655e860..81df32bde 100644 --- a/src/tools/clippy/clippy_lints/src/methods/no_effect_replace.rs +++ b/src/tools/clippy/clippy_lints/src/methods/no_effect_replace.rs @@ -1,7 +1,6 @@ use clippy_utils::diagnostics::span_lint; use clippy_utils::ty::is_type_lang_item; use clippy_utils::SpanlessEq; -use if_chain::if_chain; use rustc_ast::LitKind; use rustc_hir::{ExprKind, LangItem}; use rustc_lint::LateContext; @@ -19,17 +18,13 @@ pub(super) fn check<'tcx>( return; } - if_chain! { - if let ExprKind::Lit(spanned) = &arg1.kind; - if let Some(param1) = lit_string_value(&spanned.node); - - if let ExprKind::Lit(spanned) = &arg2.kind; - if let LitKind::Str(param2, _) = &spanned.node; - if param1 == param2.as_str(); - - then { - span_lint(cx, NO_EFFECT_REPLACE, expr.span, "replacing text with itself"); - } + if let ExprKind::Lit(spanned) = &arg1.kind + && let Some(param1) = lit_string_value(&spanned.node) + && let ExprKind::Lit(spanned) = &arg2.kind + && let LitKind::Str(param2, _) = &spanned.node + && param1 == param2.as_str() + { + span_lint(cx, NO_EFFECT_REPLACE, expr.span, "replacing text with itself"); } if SpanlessEq::new(cx).eq_expr(arg1, arg2) { diff --git a/src/tools/clippy/clippy_lints/src/methods/ok_expect.rs b/src/tools/clippy/clippy_lints/src/methods/ok_expect.rs index f2ef42933..e10bc0216 100644 --- a/src/tools/clippy/clippy_lints/src/methods/ok_expect.rs +++ b/src/tools/clippy/clippy_lints/src/methods/ok_expect.rs @@ -1,6 +1,5 @@ use clippy_utils::diagnostics::span_lint_and_help; use clippy_utils::ty::{has_debug_impl, is_type_diagnostic_item}; -use if_chain::if_chain; use rustc_hir as hir; use rustc_lint::LateContext; use rustc_middle::ty::{self, Ty}; @@ -10,23 +9,20 @@ use super::OK_EXPECT; /// lint use of `ok().expect()` for `Result`s pub(super) fn check(cx: &LateContext<'_>, expr: &hir::Expr<'_>, recv: &hir::Expr<'_>) { - if_chain! { + if is_type_diagnostic_item(cx, cx.typeck_results().expr_ty(recv), sym::Result) // lint if the caller of `ok()` is a `Result` - if is_type_diagnostic_item(cx, cx.typeck_results().expr_ty(recv), sym::Result); - let result_type = cx.typeck_results().expr_ty(recv); - if let Some(error_type) = get_error_type(cx, result_type); - if has_debug_impl(cx, error_type); - - then { - span_lint_and_help( - cx, - OK_EXPECT, - expr.span, - "called `ok().expect()` on a `Result` value", - None, - "you can call `expect()` directly on the `Result`", - ); - } + && let result_type = cx.typeck_results().expr_ty(recv) + && let Some(error_type) = get_error_type(cx, result_type) + && has_debug_impl(cx, error_type) + { + span_lint_and_help( + cx, + OK_EXPECT, + expr.span, + "called `ok().expect()` on a `Result` value", + None, + "you can call `expect()` directly on the `Result`", + ); } } diff --git a/src/tools/clippy/clippy_lints/src/methods/option_as_ref_deref.rs b/src/tools/clippy/clippy_lints/src/methods/option_as_ref_deref.rs index 7b81d4571..756dbe62d 100644 --- a/src/tools/clippy/clippy_lints/src/methods/option_as_ref_deref.rs +++ b/src/tools/clippy/clippy_lints/src/methods/option_as_ref_deref.rs @@ -3,7 +3,6 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet; use clippy_utils::ty::is_type_diagnostic_item; use clippy_utils::{match_def_path, path_to_local_id, paths, peel_blocks}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_lint::LateContext; @@ -58,34 +57,30 @@ pub(super) fn check( match &closure_expr.kind { hir::ExprKind::MethodCall(_, receiver, [], _) => { - if_chain! { - if path_to_local_id(receiver, closure_body.params[0].pat.hir_id); - let adj = cx + if path_to_local_id(receiver, closure_body.params[0].pat.hir_id) + && let adj = cx .typeck_results() .expr_adjustments(receiver) .iter() .map(|x| &x.kind) - .collect::<Box<[_]>>(); - if let [ty::adjustment::Adjust::Deref(None), ty::adjustment::Adjust::Borrow(_)] = *adj; - then { - let method_did = cx.typeck_results().type_dependent_def_id(closure_expr.hir_id).unwrap(); - cx.tcx.is_diagnostic_item(sym::deref_method, method_did) - || cx.tcx.is_diagnostic_item(sym::deref_mut_method, method_did) - || deref_aliases.iter().any(|path| match_def_path(cx, method_did, path)) - } else { - false - } + .collect::<Box<[_]>>() + && let [ty::adjustment::Adjust::Deref(None), ty::adjustment::Adjust::Borrow(_)] = *adj + { + let method_did = cx.typeck_results().type_dependent_def_id(closure_expr.hir_id).unwrap(); + cx.tcx.is_diagnostic_item(sym::deref_method, method_did) + || cx.tcx.is_diagnostic_item(sym::deref_mut_method, method_did) + || deref_aliases.iter().any(|path| match_def_path(cx, method_did, path)) + } else { + false } }, hir::ExprKind::AddrOf(hir::BorrowKind::Ref, m, inner) if same_mutability(m) => { - if_chain! { - if let hir::ExprKind::Unary(hir::UnOp::Deref, inner1) = inner.kind; - if let hir::ExprKind::Unary(hir::UnOp::Deref, inner2) = inner1.kind; - then { - path_to_local_id(inner2, closure_body.params[0].pat.hir_id) - } else { - false - } + if let hir::ExprKind::Unary(hir::UnOp::Deref, inner1) = inner.kind + && let hir::ExprKind::Unary(hir::UnOp::Deref, inner2) = inner1.kind + { + path_to_local_id(inner2, closure_body.params[0].pat.hir_id) + } else { + false } }, _ => false, @@ -104,10 +99,7 @@ pub(super) fn check( let hint = format!("{}.{method_hint}()", snippet(cx, as_ref_recv.span, "..")); let suggestion = format!("try using {method_hint} instead"); - let msg = format!( - "called `{current_method}` on an Option value. This can be done more directly \ - by calling `{hint}` instead" - ); + let msg = format!("called `{current_method}` on an `Option` value"); span_lint_and_sugg( cx, OPTION_AS_REF_DEREF, diff --git a/src/tools/clippy/clippy_lints/src/methods/option_map_or_err_ok.rs b/src/tools/clippy/clippy_lints/src/methods/option_map_or_err_ok.rs new file mode 100644 index 000000000..91e39d5a1 --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/methods/option_map_or_err_ok.rs @@ -0,0 +1,41 @@ +use clippy_utils::diagnostics::span_lint_and_sugg; +use clippy_utils::source::snippet; +use clippy_utils::ty::is_type_diagnostic_item; +use clippy_utils::{is_res_lang_ctor, path_res}; +use rustc_errors::Applicability; +use rustc_hir::LangItem::{ResultErr, ResultOk}; +use rustc_hir::{Expr, ExprKind}; +use rustc_lint::LateContext; +use rustc_span::symbol::sym; + +use super::OPTION_MAP_OR_ERR_OK; + +pub(super) fn check<'tcx>( + cx: &LateContext<'tcx>, + expr: &'tcx Expr<'tcx>, + recv: &'tcx Expr<'_>, + or_expr: &'tcx Expr<'_>, + map_expr: &'tcx Expr<'_>, +) { + // We check that it's called on an `Option` type. + if is_type_diagnostic_item(cx, cx.typeck_results().expr_ty(recv), sym::Option) + // We check that first we pass an `Err`. + && let ExprKind::Call(call, &[arg]) = or_expr.kind + && is_res_lang_ctor(cx, path_res(cx, call), ResultErr) + // And finally we check that it is mapped as `Ok`. + && is_res_lang_ctor(cx, path_res(cx, map_expr), ResultOk) + { + let msg = "called `map_or(Err(_), Ok)` on an `Option` value"; + let self_snippet = snippet(cx, recv.span, ".."); + let err_snippet = snippet(cx, arg.span, ".."); + span_lint_and_sugg( + cx, + OPTION_MAP_OR_ERR_OK, + expr.span, + msg, + "try using `ok_or` instead", + format!("{self_snippet}.ok_or({err_snippet})"), + Applicability::MachineApplicable, + ); + } +} diff --git a/src/tools/clippy/clippy_lints/src/methods/option_map_or_none.rs b/src/tools/clippy/clippy_lints/src/methods/option_map_or_none.rs index cb6a23068..ff4d8cc9e 100644 --- a/src/tools/clippy/clippy_lints/src/methods/option_map_or_none.rs +++ b/src/tools/clippy/clippy_lints/src/methods/option_map_or_none.rs @@ -58,32 +58,28 @@ pub(super) fn check<'tcx>( if is_option { let self_snippet = snippet(cx, recv.span, ".."); - if_chain! { - if let hir::ExprKind::Closure(&hir::Closure { body, fn_decl_span, .. }) = map_arg.kind; - let arg_snippet = snippet(cx, fn_decl_span, ".."); - let body = cx.tcx.hir().body(body); - if let Some((func, [arg_char])) = reduce_unit_expression(body.value); - if let Some(id) = path_def_id(cx, func).map(|ctor_id| cx.tcx.parent(ctor_id)); - if Some(id) == cx.tcx.lang_items().option_some_variant(); - then { - let func_snippet = snippet(cx, arg_char.span, ".."); - let msg = "called `map_or(None, ..)` on an `Option` value. This can be done more directly by calling \ - `map(..)` instead"; - return span_lint_and_sugg( - cx, - OPTION_MAP_OR_NONE, - expr.span, - msg, - "try using `map` instead", - format!("{self_snippet}.map({arg_snippet} {func_snippet})"), - Applicability::MachineApplicable, - ); - } + if let hir::ExprKind::Closure(&hir::Closure { body, fn_decl_span, .. }) = map_arg.kind + && let arg_snippet = snippet(cx, fn_decl_span, "..") + && let body = cx.tcx.hir().body(body) + && let Some((func, [arg_char])) = reduce_unit_expression(body.value) + && let Some(id) = path_def_id(cx, func).map(|ctor_id| cx.tcx.parent(ctor_id)) + && Some(id) == cx.tcx.lang_items().option_some_variant() + { + let func_snippet = snippet(cx, arg_char.span, ".."); + let msg = "called `map_or(None, ..)` on an `Option` value"; + return span_lint_and_sugg( + cx, + OPTION_MAP_OR_NONE, + expr.span, + msg, + "try using `map` instead", + format!("{self_snippet}.map({arg_snippet} {func_snippet})"), + Applicability::MachineApplicable, + ); } let func_snippet = snippet(cx, map_arg.span, ".."); - let msg = "called `map_or(None, ..)` on an `Option` value. This can be done more directly by calling \ - `and_then(..)` instead"; + let msg = "called `map_or(None, ..)` on an `Option` value"; span_lint_and_sugg( cx, OPTION_MAP_OR_NONE, @@ -94,8 +90,7 @@ pub(super) fn check<'tcx>( Applicability::MachineApplicable, ); } else if f_arg_is_some { - let msg = "called `map_or(None, Some)` on a `Result` value. This can be done more directly by calling \ - `ok()` instead"; + let msg = "called `map_or(None, Some)` on a `Result` value"; let self_snippet = snippet(cx, recv.span, ".."); span_lint_and_sugg( cx, diff --git a/src/tools/clippy/clippy_lints/src/methods/option_map_unwrap_or.rs b/src/tools/clippy/clippy_lints/src/methods/option_map_unwrap_or.rs index c78f8b71c..63e64a5b3 100644 --- a/src/tools/clippy/clippy_lints/src/methods/option_map_unwrap_or.rs +++ b/src/tools/clippy/clippy_lints/src/methods/option_map_unwrap_or.rs @@ -6,7 +6,7 @@ use rustc_data_structures::fx::FxHashSet; use rustc_errors::Applicability; use rustc_hir::def::Res; use rustc_hir::intravisit::{walk_path, Visitor}; -use rustc_hir::{self, ExprKind, HirId, Node, PatKind, Path, QPath}; +use rustc_hir::{ExprKind, HirId, Node, PatKind, Path, QPath}; use rustc_lint::LateContext; use rustc_middle::hir::nested_filter; use rustc_span::{sym, Span}; @@ -97,10 +97,7 @@ pub(super) fn check<'tcx>( } else { "map_or(<a>, <f>)" }; - let msg = &format!( - "called `map(<f>).unwrap_or({arg})` on an `Option` value. \ - This can be done more directly by calling `{suggest}` instead" - ); + let msg = &format!("called `map(<f>).unwrap_or({arg})` on an `Option` value"); span_lint_and_then(cx, MAP_UNWRAP_OR, expr.span, msg, |diag| { let map_arg_span = map_arg.span; @@ -138,7 +135,7 @@ impl<'a, 'tcx> Visitor<'tcx> for UnwrapVisitor<'a, 'tcx> { fn visit_path(&mut self, path: &Path<'tcx>, _: HirId) { if let Res::Local(local_id) = path.res - && let Some(Node::Pat(pat)) = self.cx.tcx.hir().find(local_id) + && let Some(Node::Pat(pat)) = self.cx.tcx.opt_hir_node(local_id) && let PatKind::Binding(_, local_id, ..) = pat.kind { self.identifiers.insert(local_id); @@ -169,7 +166,7 @@ impl<'a, 'tcx> Visitor<'tcx> for ReferenceVisitor<'a, 'tcx> { && let ExprKind::Path(ref path) = expr.kind && let QPath::Resolved(_, path) = path && let Res::Local(local_id) = path.res - && let Some(Node::Pat(pat)) = self.cx.tcx.hir().find(local_id) + && let Some(Node::Pat(pat)) = self.cx.tcx.opt_hir_node(local_id) && let PatKind::Binding(_, local_id, ..) = pat.kind && self.identifiers.contains(&local_id) { diff --git a/src/tools/clippy/clippy_lints/src/methods/or_fun_call.rs b/src/tools/clippy/clippy_lints/src/methods/or_fun_call.rs index b89c15146..e38c66f67 100644 --- a/src/tools/clippy/clippy_lints/src/methods/or_fun_call.rs +++ b/src/tools/clippy/clippy_lints/src/methods/or_fun_call.rs @@ -3,12 +3,11 @@ use clippy_utils::eager_or_lazy::switch_to_lazy_eval; use clippy_utils::source::snippet_with_context; use clippy_utils::ty::{expr_type_is_certain, implements_trait, is_type_diagnostic_item}; use clippy_utils::{contains_return, is_default_equivalent, is_default_equivalent_call, last_path_segment}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_lint::LateContext; use rustc_middle::ty; -use rustc_span::Span; use rustc_span::symbol::{self, sym, Symbol}; +use rustc_span::Span; use {rustc_ast as ast, rustc_hir as hir}; use super::{OR_FUN_CALL, UNWRAP_OR_DEFAULT}; @@ -131,54 +130,47 @@ pub(super) fn check<'tcx>( (sym::Result, true, &["or", "unwrap_or"], "else"), ]; - if_chain! { - if KNOW_TYPES.iter().any(|k| k.2.contains(&name)); - - if switch_to_lazy_eval(cx, arg); - if !contains_return(arg); - - let self_ty = cx.typeck_results().expr_ty(self_expr); - - if let Some(&(_, fn_has_arguments, poss, suffix)) = - KNOW_TYPES.iter().find(|&&i| is_type_diagnostic_item(cx, self_ty, i.0)); - - if poss.contains(&name); - - then { - let ctxt = span.ctxt(); - let mut app = Applicability::HasPlaceholders; - let sugg = { - let (snippet_span, use_lambda) = match (fn_has_arguments, fun_span) { - (false, Some(fun_span)) => (fun_span, false), - _ => (arg.span, true), - }; - - let snip = snippet_with_context(cx, snippet_span, ctxt, "..", &mut app).0; - let snip = if use_lambda { - let l_arg = if fn_has_arguments { "_" } else { "" }; - format!("|{l_arg}| {snip}") - } else { - snip.into_owned() - }; - - if let Some(f) = second_arg { - let f = snippet_with_context(cx, f.span, ctxt, "..", &mut app).0; - format!("{snip}, {f}") - } else { - snip - } + if KNOW_TYPES.iter().any(|k| k.2.contains(&name)) + && switch_to_lazy_eval(cx, arg) + && !contains_return(arg) + && let self_ty = cx.typeck_results().expr_ty(self_expr) + && let Some(&(_, fn_has_arguments, poss, suffix)) = + KNOW_TYPES.iter().find(|&&i| is_type_diagnostic_item(cx, self_ty, i.0)) + && poss.contains(&name) + { + let ctxt = span.ctxt(); + let mut app = Applicability::HasPlaceholders; + let sugg = { + let (snippet_span, use_lambda) = match (fn_has_arguments, fun_span) { + (false, Some(fun_span)) => (fun_span, false), + _ => (arg.span, true), + }; + + let snip = snippet_with_context(cx, snippet_span, ctxt, "..", &mut app).0; + let snip = if use_lambda { + let l_arg = if fn_has_arguments { "_" } else { "" }; + format!("|{l_arg}| {snip}") + } else { + snip.into_owned() }; - let span_replace_word = method_span.with_hi(span.hi()); - span_lint_and_sugg( - cx, - OR_FUN_CALL, - span_replace_word, - &format!("use of `{name}` followed by a function call"), - "try", - format!("{name}_{suffix}({sugg})"), - app, - ); - } + + if let Some(f) = second_arg { + let f = snippet_with_context(cx, f.span, ctxt, "..", &mut app).0; + format!("{snip}, {f}") + } else { + snip + } + }; + let span_replace_word = method_span.with_hi(span.hi()); + span_lint_and_sugg( + cx, + OR_FUN_CALL, + span_replace_word, + &format!("use of `{name}` followed by a function call"), + "try", + format!("{name}_{suffix}({sugg})"), + app, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/methods/path_buf_push_overwrite.rs b/src/tools/clippy/clippy_lints/src/methods/path_buf_push_overwrite.rs index 1c07d2a3a..04a27cc98 100644 --- a/src/tools/clippy/clippy_lints/src/methods/path_buf_push_overwrite.rs +++ b/src/tools/clippy/clippy_lints/src/methods/path_buf_push_overwrite.rs @@ -1,6 +1,5 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::ty::is_type_diagnostic_item; -use if_chain::if_chain; use rustc_ast::ast::LitKind; use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind}; @@ -11,27 +10,25 @@ use std::path::{Component, Path}; use super::PATH_BUF_PUSH_OVERWRITE; pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>, arg: &'tcx Expr<'_>) { - if_chain! { - if let Some(method_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id); - if let Some(impl_id) = cx.tcx.impl_of_method(method_id); - if is_type_diagnostic_item(cx, cx.tcx.type_of(impl_id).instantiate_identity(), sym::PathBuf); - if let ExprKind::Lit(lit) = arg.kind; - if let LitKind::Str(ref path_lit, _) = lit.node; - if let pushed_path = Path::new(path_lit.as_str()); - if let Some(pushed_path_lit) = pushed_path.to_str(); - if pushed_path.has_root(); - if let Some(root) = pushed_path.components().next(); - if root == Component::RootDir; - then { - span_lint_and_sugg( - cx, - PATH_BUF_PUSH_OVERWRITE, - lit.span, - "calling `push` with '/' or '\\' (file system root) will overwrite the previous path definition", - "try", - format!("\"{}\"", pushed_path_lit.trim_start_matches(|c| c == '/' || c == '\\')), - Applicability::MachineApplicable, - ); - } + if let Some(method_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id) + && let Some(impl_id) = cx.tcx.impl_of_method(method_id) + && is_type_diagnostic_item(cx, cx.tcx.type_of(impl_id).instantiate_identity(), sym::PathBuf) + && let ExprKind::Lit(lit) = arg.kind + && let LitKind::Str(ref path_lit, _) = lit.node + && let pushed_path = Path::new(path_lit.as_str()) + && let Some(pushed_path_lit) = pushed_path.to_str() + && pushed_path.has_root() + && let Some(root) = pushed_path.components().next() + && root == Component::RootDir + { + span_lint_and_sugg( + cx, + PATH_BUF_PUSH_OVERWRITE, + lit.span, + "calling `push` with '/' or '\\' (file system root) will overwrite the previous path definition", + "try", + format!("\"{}\"", pushed_path_lit.trim_start_matches(|c| c == '/' || c == '\\')), + Applicability::MachineApplicable, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/methods/range_zip_with_len.rs b/src/tools/clippy/clippy_lints/src/methods/range_zip_with_len.rs index f253d8de9..1148628b0 100644 --- a/src/tools/clippy/clippy_lints/src/methods/range_zip_with_len.rs +++ b/src/tools/clippy/clippy_lints/src/methods/range_zip_with_len.rs @@ -1,7 +1,6 @@ use clippy_utils::diagnostics::span_lint; use clippy_utils::source::snippet; use clippy_utils::{higher, is_integer_const, is_trait_method, SpanlessEq}; -use if_chain::if_chain; use rustc_hir::{Expr, ExprKind, QPath}; use rustc_lint::LateContext; use rustc_span::sym; @@ -9,25 +8,26 @@ use rustc_span::sym; use super::RANGE_ZIP_WITH_LEN; pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>, recv: &'tcx Expr<'_>, zip_arg: &'tcx Expr<'_>) { - if_chain! { - if is_trait_method(cx, expr, sym::Iterator); + if is_trait_method(cx, expr, sym::Iterator) // range expression in `.zip()` call: `0..x.len()` - if let Some(higher::Range { start: Some(start), end: Some(end), .. }) = higher::Range::hir(zip_arg); - if is_integer_const(cx, start, 0); + && let Some(higher::Range { start: Some(start), end: Some(end), .. }) = higher::Range::hir(zip_arg) + && is_integer_const(cx, start, 0) // `.len()` call - if let ExprKind::MethodCall(len_path, len_recv, [], _) = end.kind; - if len_path.ident.name == sym::len; + && let ExprKind::MethodCall(len_path, len_recv, [], _) = end.kind + && len_path.ident.name == sym::len // `.iter()` and `.len()` called on same `Path` - if let ExprKind::Path(QPath::Resolved(_, iter_path)) = recv.kind; - if let ExprKind::Path(QPath::Resolved(_, len_path)) = len_recv.kind; - if SpanlessEq::new(cx).eq_path_segments(iter_path.segments, len_path.segments); - then { - span_lint(cx, - RANGE_ZIP_WITH_LEN, - expr.span, - &format!("it is more idiomatic to use `{}.iter().enumerate()`", - snippet(cx, recv.span, "_")) - ); - } + && let ExprKind::Path(QPath::Resolved(_, iter_path)) = recv.kind + && let ExprKind::Path(QPath::Resolved(_, len_path)) = len_recv.kind + && SpanlessEq::new(cx).eq_path_segments(iter_path.segments, len_path.segments) + { + span_lint( + cx, + RANGE_ZIP_WITH_LEN, + expr.span, + &format!( + "it is more idiomatic to use `{}.iter().enumerate()`", + snippet(cx, recv.span, "_") + ), + ); } } diff --git a/src/tools/clippy/clippy_lints/src/methods/result_map_or_else_none.rs b/src/tools/clippy/clippy_lints/src/methods/result_map_or_else_none.rs new file mode 100644 index 000000000..bc16a1128 --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/methods/result_map_or_else_none.rs @@ -0,0 +1,42 @@ +use clippy_utils::diagnostics::span_lint_and_sugg; +use clippy_utils::source::snippet; +use clippy_utils::ty::is_type_diagnostic_item; +use clippy_utils::{is_res_lang_ctor, path_res, peel_blocks}; +use rustc_errors::Applicability; +use rustc_hir as hir; +use rustc_hir::LangItem::{OptionNone, OptionSome}; +use rustc_lint::LateContext; +use rustc_span::symbol::sym; + +use super::RESULT_MAP_OR_INTO_OPTION; + +/// lint use of `_.map_or_else(|_| None, Some)` for `Result`s +pub(super) fn check<'tcx>( + cx: &LateContext<'tcx>, + expr: &'tcx hir::Expr<'_>, + recv: &'tcx hir::Expr<'_>, + def_arg: &'tcx hir::Expr<'_>, + map_arg: &'tcx hir::Expr<'_>, +) { + // lint if the caller of `map_or_else()` is a `Result` + if is_type_diagnostic_item(cx, cx.typeck_results().expr_ty(recv), sym::Result) + // We check that it is mapped as `Some`. + && is_res_lang_ctor(cx, path_res(cx, map_arg), OptionSome) + && let hir::ExprKind::Closure(&hir::Closure { body, .. }) = def_arg.kind + && let body = cx.tcx.hir().body(body) + // And finally we check that we return a `None` in the "else case". + && is_res_lang_ctor(cx, path_res(cx, peel_blocks(body.value)), OptionNone) + { + let msg = "called `map_or_else(|_| None, Some)` on a `Result` value"; + let self_snippet = snippet(cx, recv.span, ".."); + span_lint_and_sugg( + cx, + RESULT_MAP_OR_INTO_OPTION, + expr.span, + msg, + "try using `ok` instead", + format!("{self_snippet}.ok()"), + Applicability::MachineApplicable, + ); + } +} diff --git a/src/tools/clippy/clippy_lints/src/methods/search_is_some.rs b/src/tools/clippy/clippy_lints/src/methods/search_is_some.rs index 05a9a06c8..6339011c9 100644 --- a/src/tools/clippy/clippy_lints/src/methods/search_is_some.rs +++ b/src/tools/clippy/clippy_lints/src/methods/search_is_some.rs @@ -3,13 +3,12 @@ use clippy_utils::source::{snippet, snippet_with_applicability}; use clippy_utils::sugg::deref_closure_args; use clippy_utils::ty::is_type_lang_item; use clippy_utils::{is_trait_method, strip_pat_refs}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_hir::PatKind; use rustc_lint::LateContext; -use rustc_span::Span; use rustc_span::symbol::sym; +use rustc_span::Span; use super::SEARCH_IS_SOME; @@ -35,29 +34,27 @@ pub(super) fn check<'tcx>( // suggest `any(|x| ..)` instead of `any(|&x| ..)` for `find(|&x| ..).is_some()` // suggest `any(|..| *..)` instead of `any(|..| **..)` for `find(|..| **..).is_some()` let mut applicability = Applicability::MachineApplicable; - let any_search_snippet = if_chain! { - if search_method == "find"; - if let hir::ExprKind::Closure(&hir::Closure { body, .. }) = search_arg.kind; - let closure_body = cx.tcx.hir().body(body); - if let Some(closure_arg) = closure_body.params.first(); - then { - if let hir::PatKind::Ref(..) = closure_arg.pat.kind { - Some(search_snippet.replacen('&', "", 1)) - } else if let PatKind::Binding(..) = strip_pat_refs(closure_arg.pat).kind { - // `find()` provides a reference to the item, but `any` does not, - // so we should fix item usages for suggestion - if let Some(closure_sugg) = deref_closure_args(cx, search_arg) { - applicability = closure_sugg.applicability; - Some(closure_sugg.suggestion) - } else { - Some(search_snippet.to_string()) - } + let any_search_snippet = if search_method == "find" + && let hir::ExprKind::Closure(&hir::Closure { body, .. }) = search_arg.kind + && let closure_body = cx.tcx.hir().body(body) + && let Some(closure_arg) = closure_body.params.first() + { + if let hir::PatKind::Ref(..) = closure_arg.pat.kind { + Some(search_snippet.replacen('&', "", 1)) + } else if let PatKind::Binding(..) = strip_pat_refs(closure_arg.pat).kind { + // `find()` provides a reference to the item, but `any` does not, + // so we should fix item usages for suggestion + if let Some(closure_sugg) = deref_closure_args(cx, search_arg) { + applicability = closure_sugg.applicability; + Some(closure_sugg.suggestion) } else { - None + Some(search_snippet.to_string()) } } else { None } + } else { + None }; // add note if not multi-line if is_some { @@ -110,41 +107,37 @@ pub(super) fn check<'tcx>( self_ty.is_str() } }; - if_chain! { - if is_string_or_str_slice(search_recv); - if is_string_or_str_slice(search_arg); - then { - let msg = format!("called `{option_check_method}()` after calling `find()` on a string"); - match option_check_method { - "is_some" => { - let mut applicability = Applicability::MachineApplicable; - let find_arg = snippet_with_applicability(cx, search_arg.span, "..", &mut applicability); - span_lint_and_sugg( - cx, - SEARCH_IS_SOME, - method_span.with_hi(expr.span.hi()), - &msg, - "use `contains()` instead", - format!("contains({find_arg})"), - applicability, - ); - }, - "is_none" => { - let string = snippet(cx, search_recv.span, ".."); - let mut applicability = Applicability::MachineApplicable; - let find_arg = snippet_with_applicability(cx, search_arg.span, "..", &mut applicability); - span_lint_and_sugg( - cx, - SEARCH_IS_SOME, - expr.span, - &msg, - "use `!_.contains()` instead", - format!("!{string}.contains({find_arg})"), - applicability, - ); - }, - _ => (), - } + if is_string_or_str_slice(search_recv) && is_string_or_str_slice(search_arg) { + let msg = format!("called `{option_check_method}()` after calling `find()` on a string"); + match option_check_method { + "is_some" => { + let mut applicability = Applicability::MachineApplicable; + let find_arg = snippet_with_applicability(cx, search_arg.span, "..", &mut applicability); + span_lint_and_sugg( + cx, + SEARCH_IS_SOME, + method_span.with_hi(expr.span.hi()), + &msg, + "use `contains()` instead", + format!("contains({find_arg})"), + applicability, + ); + }, + "is_none" => { + let string = snippet(cx, search_recv.span, ".."); + let mut applicability = Applicability::MachineApplicable; + let find_arg = snippet_with_applicability(cx, search_arg.span, "..", &mut applicability); + span_lint_and_sugg( + cx, + SEARCH_IS_SOME, + expr.span, + &msg, + "use `!_.contains()` instead", + format!("!{string}.contains({find_arg})"), + applicability, + ); + }, + _ => (), } } } diff --git a/src/tools/clippy/clippy_lints/src/methods/single_char_pattern.rs b/src/tools/clippy/clippy_lints/src/methods/single_char_pattern.rs index 4d704ec39..3983f0c0c 100644 --- a/src/tools/clippy/clippy_lints/src/methods/single_char_pattern.rs +++ b/src/tools/clippy/clippy_lints/src/methods/single_char_pattern.rs @@ -1,6 +1,5 @@ use super::utils::get_hint_if_single_char_arg; use clippy_utils::diagnostics::span_lint_and_sugg; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_lint::LateContext; @@ -45,24 +44,23 @@ pub(super) fn check( args: &[hir::Expr<'_>], ) { for &(method, pos) in &PATTERN_METHODS { - if_chain! { - if let ty::Ref(_, ty, _) = cx.typeck_results().expr_ty_adjusted(receiver).kind(); - if ty.is_str(); - if method_name.as_str() == method && args.len() > pos; - let arg = &args[pos]; - let mut applicability = Applicability::MachineApplicable; - if let Some(hint) = get_hint_if_single_char_arg(cx, arg, &mut applicability); - then { - span_lint_and_sugg( - cx, - SINGLE_CHAR_PATTERN, - arg.span, - "single-character string constant used as pattern", - "try using a `char` instead", - hint, - applicability, - ); - } + if let ty::Ref(_, ty, _) = cx.typeck_results().expr_ty_adjusted(receiver).kind() + && ty.is_str() + && method_name.as_str() == method + && args.len() > pos + && let arg = &args[pos] + && let mut applicability = Applicability::MachineApplicable + && let Some(hint) = get_hint_if_single_char_arg(cx, arg, &mut applicability) + { + span_lint_and_sugg( + cx, + SINGLE_CHAR_PATTERN, + arg.span, + "single-character string constant used as pattern", + "try using a `char` instead", + hint, + applicability, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/methods/str_splitn.rs b/src/tools/clippy/clippy_lints/src/methods/str_splitn.rs index 9da61bca5..0e7ad8fc9 100644 --- a/src/tools/clippy/clippy_lints/src/methods/str_splitn.rs +++ b/src/tools/clippy/clippy_lints/src/methods/str_splitn.rs @@ -6,7 +6,6 @@ use clippy_utils::usage::local_used_after_expr; use clippy_utils::visitors::{for_each_expr_with_closures, Descend}; use clippy_utils::{is_diag_item_method, match_def_path, path_to_local_id, paths}; use core::ops::ControlFlow; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{ BindingAnnotation, Expr, ExprKind, HirId, LangItem, Local, MatchSource, Node, Pat, PatKind, QPath, Stmt, StmtKind, @@ -286,41 +285,35 @@ fn parse_iter_usage<'tcx>( match (name.ident.as_str(), args) { ("next", []) if cx.tcx.trait_of_item(did) == Some(iter_id) => (IterUsageKind::Nth(0), e.span), ("next_tuple", []) => { - return if_chain! { - if match_def_path(cx, did, &paths::ITERTOOLS_NEXT_TUPLE); - if let ty::Adt(adt_def, subs) = cx.typeck_results().expr_ty(e).kind(); - if cx.tcx.is_diagnostic_item(sym::Option, adt_def.did()); - if let ty::Tuple(subs) = subs.type_at(0).kind(); - if subs.len() == 2; - then { - Some(IterUsage { - kind: IterUsageKind::NextTuple, - span: e.span, - unwrap_kind: None - }) - } else { - None - } + return if match_def_path(cx, did, &paths::ITERTOOLS_NEXT_TUPLE) + && let ty::Adt(adt_def, subs) = cx.typeck_results().expr_ty(e).kind() + && cx.tcx.is_diagnostic_item(sym::Option, adt_def.did()) + && let ty::Tuple(subs) = subs.type_at(0).kind() + && subs.len() == 2 + { + Some(IterUsage { + kind: IterUsageKind::NextTuple, + span: e.span, + unwrap_kind: None, + }) + } else { + None }; }, ("nth" | "skip", [idx_expr]) if cx.tcx.trait_of_item(did) == Some(iter_id) => { if let Some(Constant::Int(idx)) = constant(cx, cx.typeck_results(), idx_expr) { let span = if name.ident.as_str() == "nth" { e.span + } else if let Some((_, Node::Expr(next_expr))) = iter.next() + && let ExprKind::MethodCall(next_name, _, [], _) = next_expr.kind + && next_name.ident.name == sym::next + && next_expr.span.ctxt() == ctxt + && let Some(next_id) = cx.typeck_results().type_dependent_def_id(next_expr.hir_id) + && cx.tcx.trait_of_item(next_id) == Some(iter_id) + { + next_expr.span } else { - if_chain! { - if let Some((_, Node::Expr(next_expr))) = iter.next(); - if let ExprKind::MethodCall(next_name, _, [], _) = next_expr.kind; - if next_name.ident.name == sym::next; - if next_expr.span.ctxt() == ctxt; - if let Some(next_id) = cx.typeck_results().type_dependent_def_id(next_expr.hir_id); - if cx.tcx.trait_of_item(next_id) == Some(iter_id); - then { - next_expr.span - } else { - return None; - } - } + return None; }; (IterUsageKind::Nth(idx), span) } else { diff --git a/src/tools/clippy/clippy_lints/src/methods/suspicious_map.rs b/src/tools/clippy/clippy_lints/src/methods/suspicious_map.rs index 0dc7fe2a2..ed49233ac 100644 --- a/src/tools/clippy/clippy_lints/src/methods/suspicious_map.rs +++ b/src/tools/clippy/clippy_lints/src/methods/suspicious_map.rs @@ -1,7 +1,6 @@ use clippy_utils::diagnostics::span_lint_and_help; use clippy_utils::usage::mutated_variables; use clippy_utils::{expr_or_init, is_trait_method}; -use if_chain::if_chain; use rustc_hir as hir; use rustc_lint::LateContext; use rustc_span::sym; @@ -9,26 +8,24 @@ use rustc_span::sym; use super::SUSPICIOUS_MAP; pub fn check(cx: &LateContext<'_>, expr: &hir::Expr<'_>, count_recv: &hir::Expr<'_>, map_arg: &hir::Expr<'_>) { - if_chain! { - if is_trait_method(cx, count_recv, sym::Iterator); - if let hir::ExprKind::Closure(closure) = expr_or_init(cx, map_arg).kind; - let closure_body = cx.tcx.hir().body(closure.body); - if !cx.typeck_results().expr_ty(closure_body.value).is_unit(); - then { - if let Some(map_mutated_vars) = mutated_variables(closure_body.value, cx) { - // A variable is used mutably inside of the closure. Suppress the lint. - if !map_mutated_vars.is_empty() { - return; - } + if is_trait_method(cx, count_recv, sym::Iterator) + && let hir::ExprKind::Closure(closure) = expr_or_init(cx, map_arg).kind + && let closure_body = cx.tcx.hir().body(closure.body) + && !cx.typeck_results().expr_ty(closure_body.value).is_unit() + { + if let Some(map_mutated_vars) = mutated_variables(closure_body.value, cx) { + // A variable is used mutably inside of the closure. Suppress the lint. + if !map_mutated_vars.is_empty() { + return; } - span_lint_and_help( - cx, - SUSPICIOUS_MAP, - expr.span, - "this call to `map()` won't have an effect on the call to `count()`", - None, - "make sure you did not confuse `map` with `filter`, `for_each` or `inspect`", - ); } + span_lint_and_help( + cx, + SUSPICIOUS_MAP, + expr.span, + "this call to `map()` won't have an effect on the call to `count()`", + None, + "make sure you did not confuse `map` with `filter`, `for_each` or `inspect`", + ); } } diff --git a/src/tools/clippy/clippy_lints/src/methods/suspicious_splitn.rs b/src/tools/clippy/clippy_lints/src/methods/suspicious_splitn.rs index 3cb2719e4..c45212581 100644 --- a/src/tools/clippy/clippy_lints/src/methods/suspicious_splitn.rs +++ b/src/tools/clippy/clippy_lints/src/methods/suspicious_splitn.rs @@ -1,5 +1,4 @@ use clippy_utils::diagnostics::span_lint_and_note; -use if_chain::if_chain; use rustc_ast::LitKind; use rustc_hir::{Expr, ExprKind}; use rustc_lint::LateContext; @@ -8,41 +7,36 @@ use rustc_span::source_map::Spanned; use super::SUSPICIOUS_SPLITN; pub(super) fn check(cx: &LateContext<'_>, method_name: &str, expr: &Expr<'_>, self_arg: &Expr<'_>, count: u128) { - if_chain! { - if count <= 1; - if let Some(call_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id); - if let Some(impl_id) = cx.tcx.impl_of_method(call_id); - if cx.tcx.impl_trait_ref(impl_id).is_none(); - let self_ty = cx.tcx.type_of(impl_id).instantiate_identity(); - if self_ty.is_slice() || self_ty.is_str(); - then { - // Ignore empty slice and string literals when used with a literal count. - if matches!(self_arg.kind, ExprKind::Array([])) - || matches!(self_arg.kind, ExprKind::Lit(Spanned { node: LitKind::Str(s, _), .. }) if s.is_empty()) - { - return; - } + if count <= 1 + && let Some(call_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id) + && let Some(impl_id) = cx.tcx.impl_of_method(call_id) + && cx.tcx.impl_trait_ref(impl_id).is_none() + && let self_ty = cx.tcx.type_of(impl_id).instantiate_identity() + && (self_ty.is_slice() || self_ty.is_str()) + { + // Ignore empty slice and string literals when used with a literal count. + if matches!(self_arg.kind, ExprKind::Array([])) + || matches!(self_arg.kind, ExprKind::Lit(Spanned { node: LitKind::Str(s, _), .. }) if s.is_empty()) + { + return; + } - let (msg, note_msg) = if count == 0 { - (format!("`{method_name}` called with `0` splits"), - "the resulting iterator will always return `None`") - } else { - (format!("`{method_name}` called with `1` split"), + let (msg, note_msg) = if count == 0 { + ( + format!("`{method_name}` called with `0` splits"), + "the resulting iterator will always return `None`", + ) + } else { + ( + format!("`{method_name}` called with `1` split"), if self_ty.is_slice() { "the resulting iterator will always return the entire slice followed by `None`" } else { "the resulting iterator will always return the entire string followed by `None`" - }) - }; + }, + ) + }; - span_lint_and_note( - cx, - SUSPICIOUS_SPLITN, - expr.span, - &msg, - None, - note_msg, - ); - } + span_lint_and_note(cx, SUSPICIOUS_SPLITN, expr.span, &msg, None, note_msg); } } diff --git a/src/tools/clippy/clippy_lints/src/methods/suspicious_to_owned.rs b/src/tools/clippy/clippy_lints/src/methods/suspicious_to_owned.rs index 9eb8d6e6e..60864902a 100644 --- a/src/tools/clippy/clippy_lints/src/methods/suspicious_to_owned.rs +++ b/src/tools/clippy/clippy_lints/src/methods/suspicious_to_owned.rs @@ -1,7 +1,6 @@ use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::is_diag_trait_item; use clippy_utils::source::snippet_with_context; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_lint::LateContext; @@ -12,40 +11,37 @@ use rustc_span::sym; use super::SUSPICIOUS_TO_OWNED; pub fn check(cx: &LateContext<'_>, expr: &hir::Expr<'_>, recv: &hir::Expr<'_>) -> bool { - if_chain! { - if let Some(method_def_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id); - if is_diag_trait_item(cx, method_def_id, sym::ToOwned); - let input_type = cx.typeck_results().expr_ty(expr); - if let ty::Adt(adt, _) = cx.typeck_results().expr_ty(expr).kind(); - if cx.tcx.is_diagnostic_item(sym::Cow, adt.did()); - - then { - let mut app = Applicability::MaybeIncorrect; - let recv_snip = snippet_with_context(cx, recv.span, expr.span.ctxt(), "..", &mut app).0; - span_lint_and_then( - cx, - SUSPICIOUS_TO_OWNED, - expr.span, - &with_forced_trimmed_paths!(format!( - "this `to_owned` call clones the {input_type} itself and does not cause the {input_type} contents to become owned" - )), - |diag| { - diag.span_suggestion( - expr.span, - "depending on intent, either make the Cow an Owned variant", - format!("{recv_snip}.into_owned()"), - app - ); - diag.span_suggestion( - expr.span, - "or clone the Cow itself", - format!("{recv_snip}.clone()"), - app - ); - } - ); - return true; - } + if let Some(method_def_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id) + && is_diag_trait_item(cx, method_def_id, sym::ToOwned) + && let input_type = cx.typeck_results().expr_ty(expr) + && let ty::Adt(adt, _) = cx.typeck_results().expr_ty(expr).kind() + && cx.tcx.is_diagnostic_item(sym::Cow, adt.did()) + { + let mut app = Applicability::MaybeIncorrect; + let recv_snip = snippet_with_context(cx, recv.span, expr.span.ctxt(), "..", &mut app).0; + span_lint_and_then( + cx, + SUSPICIOUS_TO_OWNED, + expr.span, + &with_forced_trimmed_paths!(format!( + "this `to_owned` call clones the {input_type} itself and does not cause the {input_type} contents to become owned" + )), + |diag| { + diag.span_suggestion( + expr.span, + "depending on intent, either make the Cow an Owned variant", + format!("{recv_snip}.into_owned()"), + app, + ); + diag.span_suggestion( + expr.span, + "or clone the Cow itself", + format!("{recv_snip}.clone()"), + app, + ); + }, + ); + return true; } false } diff --git a/src/tools/clippy/clippy_lints/src/methods/uninit_assumed_init.rs b/src/tools/clippy/clippy_lints/src/methods/uninit_assumed_init.rs index bc9c518db..1ee655d61 100644 --- a/src/tools/clippy/clippy_lints/src/methods/uninit_assumed_init.rs +++ b/src/tools/clippy/clippy_lints/src/methods/uninit_assumed_init.rs @@ -1,7 +1,6 @@ use clippy_utils::diagnostics::span_lint; use clippy_utils::is_path_diagnostic_item; use clippy_utils::ty::is_uninit_value_valid_for_ty; -use if_chain::if_chain; use rustc_hir as hir; use rustc_lint::LateContext; use rustc_span::sym; @@ -10,18 +9,16 @@ use super::UNINIT_ASSUMED_INIT; /// lint for `MaybeUninit::uninit().assume_init()` (we already have the latter) pub(super) fn check(cx: &LateContext<'_>, expr: &hir::Expr<'_>, recv: &hir::Expr<'_>) { - if_chain! { - if let hir::ExprKind::Call(callee, args) = recv.kind; - if args.is_empty(); - if is_path_diagnostic_item(cx, callee, sym::maybe_uninit_uninit); - if !is_uninit_value_valid_for_ty(cx, cx.typeck_results().expr_ty_adjusted(expr)); - then { - span_lint( - cx, - UNINIT_ASSUMED_INIT, - expr.span, - "this call for this type may be undefined behavior" - ); - } + if let hir::ExprKind::Call(callee, args) = recv.kind + && args.is_empty() + && is_path_diagnostic_item(cx, callee, sym::maybe_uninit_uninit) + && !is_uninit_value_valid_for_ty(cx, cx.typeck_results().expr_ty_adjusted(expr)) + { + span_lint( + cx, + UNINIT_ASSUMED_INIT, + expr.span, + "this call for this type may be undefined behavior", + ); } } diff --git a/src/tools/clippy/clippy_lints/src/methods/unnecessary_fallible_conversions.rs b/src/tools/clippy/clippy_lints/src/methods/unnecessary_fallible_conversions.rs index bb32b1bb7..89cf20c14 100644 --- a/src/tools/clippy/clippy_lints/src/methods/unnecessary_fallible_conversions.rs +++ b/src/tools/clippy/clippy_lints/src/methods/unnecessary_fallible_conversions.rs @@ -1,10 +1,11 @@ -use clippy_utils::diagnostics::span_lint_and_sugg; +use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::get_parent_expr; use clippy_utils::ty::implements_trait; use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind}; use rustc_lint::LateContext; use rustc_middle::ty; +use rustc_middle::ty::print::with_forced_trimmed_paths; use rustc_span::{sym, Span}; use super::UNNECESSARY_FALLIBLE_CONVERSIONS; @@ -42,6 +43,7 @@ fn check<'tcx>( // (else there would be conflicting impls, even with #![feature(spec)]), so we don't even need to check // what `<T as TryFrom<U>>::Error` is: it's always `Infallible` && implements_trait(cx, self_ty, from_into_trait, &[other_ty]) + && let Some(other_ty) = other_ty.as_type() { let parent_unwrap_call = get_parent_expr(cx, expr).and_then(|parent| { if let ExprKind::MethodCall(path, .., span) = parent.kind @@ -52,8 +54,7 @@ fn check<'tcx>( None } }); - - let (sugg, span, applicability) = match kind { + let (source_ty, target_ty, sugg, span, applicability) = match kind { FunctionKind::TryIntoMethod if let Some(unwrap_span) = parent_unwrap_call => { // Extend the span to include the unwrap/expect call: // `foo.try_into().expect("..")` @@ -63,24 +64,41 @@ fn check<'tcx>( // so that can be machine-applicable ( + self_ty, + other_ty, "into()", primary_span.with_hi(unwrap_span.hi()), Applicability::MachineApplicable, ) }, - FunctionKind::TryFromFunction => ("From::from", primary_span, Applicability::Unspecified), - FunctionKind::TryIntoFunction => ("Into::into", primary_span, Applicability::Unspecified), - FunctionKind::TryIntoMethod => ("into", primary_span, Applicability::Unspecified), + FunctionKind::TryFromFunction => ( + other_ty, + self_ty, + "From::from", + primary_span, + Applicability::Unspecified, + ), + FunctionKind::TryIntoFunction => ( + self_ty, + other_ty, + "Into::into", + primary_span, + Applicability::Unspecified, + ), + FunctionKind::TryIntoMethod => (self_ty, other_ty, "into", primary_span, Applicability::Unspecified), }; - span_lint_and_sugg( + span_lint_and_then( cx, UNNECESSARY_FALLIBLE_CONVERSIONS, span, "use of a fallible conversion when an infallible one could be used", - "use", - sugg.into(), - applicability, + |diag| { + with_forced_trimmed_paths!({ + diag.note(format!("converting `{source_ty}` to `{target_ty}` cannot fail")); + }); + diag.span_suggestion(span, "use", sugg, applicability); + }, ); } } diff --git a/src/tools/clippy/clippy_lints/src/methods/unnecessary_fold.rs b/src/tools/clippy/clippy_lints/src/methods/unnecessary_fold.rs index 6d51c4ab0..ebbdde48b 100644 --- a/src/tools/clippy/clippy_lints/src/methods/unnecessary_fold.rs +++ b/src/tools/clippy/clippy_lints/src/methods/unnecessary_fold.rs @@ -1,7 +1,6 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet_with_applicability; use clippy_utils::{is_trait_method, path_to_local_id, peel_blocks, strip_pat_refs}; -use if_chain::if_chain; use rustc_ast::ast; use rustc_errors::Applicability; use rustc_hir as hir; @@ -60,57 +59,51 @@ fn check_fold_with_op( op: hir::BinOpKind, replacement: Replacement, ) { - if_chain! { + if let hir::ExprKind::Closure(&hir::Closure { body, .. }) = acc.kind // Extract the body of the closure passed to fold - if let hir::ExprKind::Closure(&hir::Closure { body, .. }) = acc.kind; - let closure_body = cx.tcx.hir().body(body); - let closure_expr = peel_blocks(closure_body.value); + && let closure_body = cx.tcx.hir().body(body) + && let closure_expr = peel_blocks(closure_body.value) // Check if the closure body is of the form `acc <op> some_expr(x)` - if let hir::ExprKind::Binary(ref bin_op, left_expr, right_expr) = closure_expr.kind; - if bin_op.node == op; + && let hir::ExprKind::Binary(ref bin_op, left_expr, right_expr) = closure_expr.kind + && bin_op.node == op // Extract the names of the two arguments to the closure - if let [param_a, param_b] = closure_body.params; - if let PatKind::Binding(_, first_arg_id, ..) = strip_pat_refs(param_a.pat).kind; - if let PatKind::Binding(_, second_arg_id, second_arg_ident, _) = strip_pat_refs(param_b.pat).kind; + && let [param_a, param_b] = closure_body.params + && let PatKind::Binding(_, first_arg_id, ..) = strip_pat_refs(param_a.pat).kind + && let PatKind::Binding(_, second_arg_id, second_arg_ident, _) = strip_pat_refs(param_b.pat).kind - if path_to_local_id(left_expr, first_arg_id); - if replacement.has_args || path_to_local_id(right_expr, second_arg_id); - - then { - let mut applicability = Applicability::MachineApplicable; - - let turbofish = if replacement.has_generic_return { - format!("::<{}>", cx.typeck_results().expr_ty_adjusted(right_expr).peel_refs()) - } else { - String::new() - }; - - let sugg = if replacement.has_args { - format!( - "{method}{turbofish}(|{second_arg_ident}| {r})", - method = replacement.method_name, - r = snippet_with_applicability(cx, right_expr.span, "EXPR", &mut applicability), - ) - } else { - format!( - "{method}{turbofish}()", - method = replacement.method_name, - ) - }; - - span_lint_and_sugg( - cx, - UNNECESSARY_FOLD, - fold_span.with_hi(expr.span.hi()), - // TODO #2371 don't suggest e.g., .any(|x| f(x)) if we can suggest .any(f) - "this `.fold` can be written more succinctly using another method", - "try", - sugg, - applicability, - ); - } + && path_to_local_id(left_expr, first_arg_id) + && (replacement.has_args || path_to_local_id(right_expr, second_arg_id)) + { + let mut applicability = Applicability::MachineApplicable; + + let turbofish = if replacement.has_generic_return { + format!("::<{}>", cx.typeck_results().expr_ty_adjusted(right_expr).peel_refs()) + } else { + String::new() + }; + + let sugg = if replacement.has_args { + format!( + "{method}{turbofish}(|{second_arg_ident}| {r})", + method = replacement.method_name, + r = snippet_with_applicability(cx, right_expr.span, "EXPR", &mut applicability), + ) + } else { + format!("{method}{turbofish}()", method = replacement.method_name,) + }; + + span_lint_and_sugg( + cx, + UNNECESSARY_FOLD, + fold_span.with_hi(expr.span.hi()), + // TODO #2371 don't suggest e.g., .any(|x| f(x)) if we can suggest .any(f) + "this `.fold` can be written more succinctly using another method", + "try", + sugg, + applicability, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/methods/unnecessary_iter_cloned.rs b/src/tools/clippy/clippy_lints/src/methods/unnecessary_iter_cloned.rs index 0c72c13a3..36497d59a 100644 --- a/src/tools/clippy/clippy_lints/src/methods/unnecessary_iter_cloned.rs +++ b/src/tools/clippy/clippy_lints/src/methods/unnecessary_iter_cloned.rs @@ -13,15 +13,13 @@ use rustc_span::{sym, Symbol}; use super::UNNECESSARY_TO_OWNED; pub fn check(cx: &LateContext<'_>, expr: &Expr<'_>, method_name: Symbol, receiver: &Expr<'_>) -> bool { - if_chain! { - if let Some(parent) = get_parent_expr(cx, expr); - if let Some(callee_def_id) = fn_def_id(cx, parent); - if is_into_iter(cx, callee_def_id); - then { - check_for_loop_iter(cx, parent, method_name, receiver, false) - } else { - false - } + if let Some(parent) = get_parent_expr(cx, expr) + && let Some(callee_def_id) = fn_def_id(cx, parent) + && is_into_iter(cx, callee_def_id) + { + check_for_loop_iter(cx, parent, method_name, receiver, false) + } else { + false } } @@ -36,65 +34,58 @@ pub fn check_for_loop_iter( receiver: &Expr<'_>, cloned_before_iter: bool, ) -> bool { - if_chain! { - if let Some(grandparent) = get_parent_expr(cx, expr).and_then(|parent| get_parent_expr(cx, parent)); - if let Some(ForLoop { pat, body, .. }) = ForLoop::hir(grandparent); - let (clone_or_copy_needed, addr_of_exprs) = clone_or_copy_needed(cx, pat, body); - if !clone_or_copy_needed; - if let Some(receiver_snippet) = snippet_opt(cx, receiver.span); - then { - let snippet = if_chain! { - if let ExprKind::MethodCall(maybe_iter_method_name, collection, [], _) = receiver.kind; - if maybe_iter_method_name.ident.name == sym::iter; - - if let Some(iterator_trait_id) = cx.tcx.get_diagnostic_item(sym::Iterator); - let receiver_ty = cx.typeck_results().expr_ty(receiver); - if implements_trait(cx, receiver_ty, iterator_trait_id, &[]); - if let Some(iter_item_ty) = get_iterator_item_ty(cx, receiver_ty); - - if let Some(into_iterator_trait_id) = cx.tcx.get_diagnostic_item(sym::IntoIterator); - let collection_ty = cx.typeck_results().expr_ty(collection); - if implements_trait(cx, collection_ty, into_iterator_trait_id, &[]); - if let Some(into_iter_item_ty) = cx.get_associated_type(collection_ty, into_iterator_trait_id, "Item"); - - if iter_item_ty == into_iter_item_ty; - if let Some(collection_snippet) = snippet_opt(cx, collection.span); - then { - collection_snippet + if let Some(grandparent) = get_parent_expr(cx, expr).and_then(|parent| get_parent_expr(cx, parent)) + && let Some(ForLoop { pat, body, .. }) = ForLoop::hir(grandparent) + && let (clone_or_copy_needed, addr_of_exprs) = clone_or_copy_needed(cx, pat, body) + && !clone_or_copy_needed + && let Some(receiver_snippet) = snippet_opt(cx, receiver.span) + { + let snippet = if let ExprKind::MethodCall(maybe_iter_method_name, collection, [], _) = receiver.kind + && maybe_iter_method_name.ident.name == sym::iter + && let Some(iterator_trait_id) = cx.tcx.get_diagnostic_item(sym::Iterator) + && let receiver_ty = cx.typeck_results().expr_ty(receiver) + && implements_trait(cx, receiver_ty, iterator_trait_id, &[]) + && let Some(iter_item_ty) = get_iterator_item_ty(cx, receiver_ty) + && let Some(into_iterator_trait_id) = cx.tcx.get_diagnostic_item(sym::IntoIterator) + && let collection_ty = cx.typeck_results().expr_ty(collection) + && implements_trait(cx, collection_ty, into_iterator_trait_id, &[]) + && let Some(into_iter_item_ty) = cx.get_associated_type(collection_ty, into_iterator_trait_id, "Item") + && iter_item_ty == into_iter_item_ty + && let Some(collection_snippet) = snippet_opt(cx, collection.span) + { + collection_snippet + } else { + receiver_snippet + }; + span_lint_and_then( + cx, + UNNECESSARY_TO_OWNED, + expr.span, + &format!("unnecessary use of `{method_name}`"), + |diag| { + // If `check_into_iter_call_arg` called `check_for_loop_iter` because a call to + // a `to_owned`-like function was removed, then the next suggestion may be + // incorrect. This is because the iterator that results from the call's removal + // could hold a reference to a resource that is used mutably. See + // https://github.com/rust-lang/rust-clippy/issues/8148. + let applicability = if cloned_before_iter { + Applicability::MaybeIncorrect } else { - receiver_snippet - } - }; - span_lint_and_then( - cx, - UNNECESSARY_TO_OWNED, - expr.span, - &format!("unnecessary use of `{method_name}`"), - |diag| { - // If `check_into_iter_call_arg` called `check_for_loop_iter` because a call to - // a `to_owned`-like function was removed, then the next suggestion may be - // incorrect. This is because the iterator that results from the call's removal - // could hold a reference to a resource that is used mutably. See - // https://github.com/rust-lang/rust-clippy/issues/8148. - let applicability = if cloned_before_iter { - Applicability::MaybeIncorrect - } else { - Applicability::MachineApplicable - }; - diag.span_suggestion(expr.span, "use", snippet, applicability); - for addr_of_expr in addr_of_exprs { - match addr_of_expr.kind { - ExprKind::AddrOf(_, _, referent) => { - let span = addr_of_expr.span.with_hi(referent.span.lo()); - diag.span_suggestion(span, "remove this `&`", "", applicability); - } - _ => unreachable!(), - } + Applicability::MachineApplicable + }; + diag.span_suggestion(expr.span, "use", snippet, applicability); + for addr_of_expr in addr_of_exprs { + match addr_of_expr.kind { + ExprKind::AddrOf(_, _, referent) => { + let span = addr_of_expr.span.with_hi(referent.span.lo()); + diag.span_suggestion(span, "remove this `&`", "", applicability); + }, + _ => unreachable!(), } } - ); - return true; - } + }, + ); + return true; } false } diff --git a/src/tools/clippy/clippy_lints/src/methods/unnecessary_join.rs b/src/tools/clippy/clippy_lints/src/methods/unnecessary_join.rs index d0c62fb56..e2b389e96 100644 --- a/src/tools/clippy/clippy_lints/src/methods/unnecessary_join.rs +++ b/src/tools/clippy/clippy_lints/src/methods/unnecessary_join.rs @@ -18,25 +18,23 @@ pub(super) fn check<'tcx>( ) { let applicability = Applicability::MachineApplicable; let collect_output_adjusted_type = cx.typeck_results().expr_ty_adjusted(join_self_arg); - if_chain! { + if let Ref(_, ref_type, _) = collect_output_adjusted_type.kind() // the turbofish for collect is ::<Vec<String>> - if let Ref(_, ref_type, _) = collect_output_adjusted_type.kind(); - if let Slice(slice) = ref_type.kind(); - if is_type_lang_item(cx, *slice, LangItem::String); + && let Slice(slice) = ref_type.kind() + && is_type_lang_item(cx, *slice, LangItem::String) // the argument for join is "" - if let ExprKind::Lit(spanned) = &join_arg.kind; - if let LitKind::Str(symbol, _) = spanned.node; - if symbol.is_empty(); - then { - span_lint_and_sugg( - cx, - UNNECESSARY_JOIN, - span.with_hi(expr.span.hi()), - r#"called `.collect::<Vec<String>>().join("")` on an iterator"#, - "try using", - "collect::<String>()".to_owned(), - applicability, - ); - } + && let ExprKind::Lit(spanned) = &join_arg.kind + && let LitKind::Str(symbol, _) = spanned.node + && symbol.is_empty() + { + span_lint_and_sugg( + cx, + UNNECESSARY_JOIN, + span.with_hi(expr.span.hi()), + r#"called `.collect::<Vec<String>>().join("")` on an iterator"#, + "try using", + "collect::<String>()".to_owned(), + applicability, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/methods/unnecessary_sort_by.rs b/src/tools/clippy/clippy_lints/src/methods/unnecessary_sort_by.rs index e62a65a27..696e5e74d 100644 --- a/src/tools/clippy/clippy_lints/src/methods/unnecessary_sort_by.rs +++ b/src/tools/clippy/clippy_lints/src/methods/unnecessary_sort_by.rs @@ -2,7 +2,6 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::is_trait_method; use clippy_utils::sugg::Sugg; use clippy_utils::ty::implements_trait; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{Closure, Expr, ExprKind, Mutability, Param, Pat, PatKind, Path, PathSegment, QPath}; use rustc_lint::LateContext; @@ -115,55 +114,72 @@ fn mirrored_exprs(a_expr: &Expr<'_>, a_ident: &Ident, b_expr: &Expr<'_>, b_ident } fn detect_lint(cx: &LateContext<'_>, expr: &Expr<'_>, recv: &Expr<'_>, arg: &Expr<'_>) -> Option<LintTrigger> { - if_chain! { - if let Some(method_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id); - if let Some(impl_id) = cx.tcx.impl_of_method(method_id); - if cx.tcx.type_of(impl_id).instantiate_identity().is_slice(); - if let ExprKind::Closure(&Closure { body, .. }) = arg.kind; - if let closure_body = cx.tcx.hir().body(body); - if let &[ - Param { pat: Pat { kind: PatKind::Binding(_, _, left_ident, _), .. }, ..}, - Param { pat: Pat { kind: PatKind::Binding(_, _, right_ident, _), .. }, .. } - ] = &closure_body.params; - if let ExprKind::MethodCall(method_path, left_expr, [right_expr], _) = closure_body.value.kind; - if method_path.ident.name == sym::cmp; - if is_trait_method(cx, closure_body.value, sym::Ord); - then { - let (closure_body, closure_arg, reverse) = if mirrored_exprs( - left_expr, - left_ident, - right_expr, - right_ident - ) { - (Sugg::hir(cx, left_expr, "..").to_string(), left_ident.name.to_string(), false) - } else if mirrored_exprs(left_expr, right_ident, right_expr, left_ident) { - (Sugg::hir(cx, left_expr, "..").to_string(), right_ident.name.to_string(), true) - } else { - return None; - }; - let vec_name = Sugg::hir(cx, recv, "..").to_string(); + if let Some(method_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id) + && let Some(impl_id) = cx.tcx.impl_of_method(method_id) + && cx.tcx.type_of(impl_id).instantiate_identity().is_slice() + && let ExprKind::Closure(&Closure { body, .. }) = arg.kind + && let closure_body = cx.tcx.hir().body(body) + && let &[ + Param { + pat: + Pat { + kind: PatKind::Binding(_, _, left_ident, _), + .. + }, + .. + }, + Param { + pat: + Pat { + kind: PatKind::Binding(_, _, right_ident, _), + .. + }, + .. + }, + ] = &closure_body.params + && let ExprKind::MethodCall(method_path, left_expr, [right_expr], _) = closure_body.value.kind + && method_path.ident.name == sym::cmp + && is_trait_method(cx, closure_body.value, sym::Ord) + { + let (closure_body, closure_arg, reverse) = if mirrored_exprs(left_expr, left_ident, right_expr, right_ident) { + ( + Sugg::hir(cx, left_expr, "..").to_string(), + left_ident.name.to_string(), + false, + ) + } else if mirrored_exprs(left_expr, right_ident, right_expr, left_ident) { + ( + Sugg::hir(cx, left_expr, "..").to_string(), + right_ident.name.to_string(), + true, + ) + } else { + return None; + }; + let vec_name = Sugg::hir(cx, recv, "..").to_string(); - if_chain! { - if let ExprKind::Path(QPath::Resolved(_, Path { - segments: [PathSegment { ident: left_name, .. }], .. - })) = &left_expr.kind; - if left_name == left_ident; - if cx.tcx.get_diagnostic_item(sym::Ord).map_or(false, |id| { - implements_trait(cx, cx.typeck_results().expr_ty(left_expr), id, &[]) - }); - then { - return Some(LintTrigger::Sort(SortDetection { vec_name })); - } - } + if let ExprKind::Path(QPath::Resolved( + _, + Path { + segments: [PathSegment { ident: left_name, .. }], + .. + }, + )) = &left_expr.kind + && left_name == left_ident + && cx.tcx.get_diagnostic_item(sym::Ord).map_or(false, |id| { + implements_trait(cx, cx.typeck_results().expr_ty(left_expr), id, &[]) + }) + { + return Some(LintTrigger::Sort(SortDetection { vec_name })); + } - if !expr_borrows(cx, left_expr) { - return Some(LintTrigger::SortByKey(SortByKeyDetection { - vec_name, - closure_arg, - closure_body, - reverse, - })); - } + if !expr_borrows(cx, left_expr) { + return Some(LintTrigger::SortByKey(SortByKeyDetection { + vec_name, + closure_arg, + closure_body, + reverse, + })); } } diff --git a/src/tools/clippy/clippy_lints/src/methods/unnecessary_to_owned.rs b/src/tools/clippy/clippy_lints/src/methods/unnecessary_to_owned.rs index 7a50feff6..c4775b6bd 100644 --- a/src/tools/clippy/clippy_lints/src/methods/unnecessary_to_owned.rs +++ b/src/tools/clippy/clippy_lints/src/methods/unnecessary_to_owned.rs @@ -31,25 +31,23 @@ pub fn check<'tcx>( args: &'tcx [Expr<'_>], msrv: &Msrv, ) { - if_chain! { - if let Some(method_def_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id); - if args.is_empty(); - then { - if is_cloned_or_copied(cx, method_name, method_def_id) { - unnecessary_iter_cloned::check(cx, expr, method_name, receiver); - } else if is_to_owned_like(cx, expr, method_name, method_def_id) { - // At this point, we know the call is of a `to_owned`-like function. The functions - // `check_addr_of_expr` and `check_call_arg` determine whether the call is unnecessary - // based on its context, that is, whether it is a referent in an `AddrOf` expression, an - // argument in a `into_iter` call, or an argument in the call of some other function. - if check_addr_of_expr(cx, expr, method_name, method_def_id, receiver) { - return; - } - if check_into_iter_call_arg(cx, expr, method_name, receiver, msrv) { - return; - } - check_other_call_arg(cx, expr, method_name, receiver); + if let Some(method_def_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id) + && args.is_empty() + { + if is_cloned_or_copied(cx, method_name, method_def_id) { + unnecessary_iter_cloned::check(cx, expr, method_name, receiver); + } else if is_to_owned_like(cx, expr, method_name, method_def_id) { + // At this point, we know the call is of a `to_owned`-like function. The functions + // `check_addr_of_expr` and `check_call_arg` determine whether the call is unnecessary + // based on its context, that is, whether it is a referent in an `AddrOf` expression, an + // argument in a `into_iter` call, or an argument in the call of some other function. + if check_addr_of_expr(cx, expr, method_name, method_def_id, receiver) { + return; } + if check_into_iter_call_arg(cx, expr, method_name, receiver, msrv) { + return; + } + check_other_call_arg(cx, expr, method_name, receiver); } } } @@ -64,11 +62,10 @@ fn check_addr_of_expr( method_def_id: DefId, receiver: &Expr<'_>, ) -> bool { - if_chain! { - if let Some(parent) = get_parent_expr(cx, expr); - if let ExprKind::AddrOf(BorrowKind::Ref, Mutability::Not, _) = parent.kind; - let adjustments = cx.typeck_results().expr_adjustments(parent).iter().collect::<Vec<_>>(); - if let + if let Some(parent) = get_parent_expr(cx, expr) + && let ExprKind::AddrOf(BorrowKind::Ref, Mutability::Not, _) = parent.kind + && let adjustments = cx.typeck_results().expr_adjustments(parent).iter().collect::<Vec<_>>() + && let // For matching uses of `Cow::from` [ Adjustment { @@ -109,10 +106,10 @@ fn check_addr_of_expr( kind: Adjust::Borrow(_), target: target_ty, }, - ] = adjustments[..]; - let receiver_ty = cx.typeck_results().expr_ty(receiver); - let (target_ty, n_target_refs) = peel_mid_ty_refs(*target_ty); - let (receiver_ty, n_receiver_refs) = peel_mid_ty_refs(receiver_ty); + ] = adjustments[..] + && let receiver_ty = cx.typeck_results().expr_ty(receiver) + && let (target_ty, n_target_refs) = peel_mid_ty_refs(*target_ty) + && let (receiver_ty, n_receiver_refs) = peel_mid_ty_refs(receiver_ty) // Only flag cases satisfying at least one of the following three conditions: // * the referent and receiver types are distinct // * the referent/receiver type is a copyable array @@ -122,77 +119,72 @@ fn check_addr_of_expr( // https://github.com/rust-lang/rust-clippy/issues/8759 // Arrays are a bit of a corner case. Non-copyable arrays are handled by // `redundant_clone`, but copyable arrays are not. - if *referent_ty != receiver_ty + && (*referent_ty != receiver_ty || (matches!(referent_ty.kind(), ty::Array(..)) && is_copy(cx, *referent_ty)) - || is_cow_into_owned(cx, method_name, method_def_id); - if let Some(receiver_snippet) = snippet_opt(cx, receiver.span); - then { - if receiver_ty == target_ty && n_target_refs >= n_receiver_refs { + || is_cow_into_owned(cx, method_name, method_def_id)) + && let Some(receiver_snippet) = snippet_opt(cx, receiver.span) + { + if receiver_ty == target_ty && n_target_refs >= n_receiver_refs { + span_lint_and_sugg( + cx, + UNNECESSARY_TO_OWNED, + parent.span, + &format!("unnecessary use of `{method_name}`"), + "use", + format!( + "{:&>width$}{receiver_snippet}", + "", + width = n_target_refs - n_receiver_refs + ), + Applicability::MachineApplicable, + ); + return true; + } + if let Some(deref_trait_id) = cx.tcx.get_diagnostic_item(sym::Deref) + && implements_trait(cx, receiver_ty, deref_trait_id, &[]) + && cx.get_associated_type(receiver_ty, deref_trait_id, "Target") == Some(target_ty) + // Make sure that it's actually calling the right `.to_string()`, (#10033) + // *or* this is a `Cow::into_owned()` call (which would be the wrong into_owned receiver (str != Cow) + // but that's ok for Cow::into_owned specifically) + && (cx.typeck_results().expr_ty_adjusted(receiver).peel_refs() == target_ty + || is_cow_into_owned(cx, method_name, method_def_id)) + { + if n_receiver_refs > 0 { span_lint_and_sugg( cx, UNNECESSARY_TO_OWNED, parent.span, &format!("unnecessary use of `{method_name}`"), "use", - format!( - "{:&>width$}{receiver_snippet}", - "", - width = n_target_refs - n_receiver_refs - ), + receiver_snippet, + Applicability::MachineApplicable, + ); + } else { + span_lint_and_sugg( + cx, + UNNECESSARY_TO_OWNED, + expr.span.with_lo(receiver.span.hi()), + &format!("unnecessary use of `{method_name}`"), + "remove this", + String::new(), Applicability::MachineApplicable, ); - return true; - } - if_chain! { - if let Some(deref_trait_id) = cx.tcx.get_diagnostic_item(sym::Deref); - if implements_trait(cx, receiver_ty, deref_trait_id, &[]); - if cx.get_associated_type(receiver_ty, deref_trait_id, "Target") == Some(target_ty); - // Make sure that it's actually calling the right `.to_string()`, (#10033) - // *or* this is a `Cow::into_owned()` call (which would be the wrong into_owned receiver (str != Cow) - // but that's ok for Cow::into_owned specifically) - if cx.typeck_results().expr_ty_adjusted(receiver).peel_refs() == target_ty - || is_cow_into_owned(cx, method_name, method_def_id); - then { - if n_receiver_refs > 0 { - span_lint_and_sugg( - cx, - UNNECESSARY_TO_OWNED, - parent.span, - &format!("unnecessary use of `{method_name}`"), - "use", - receiver_snippet, - Applicability::MachineApplicable, - ); - } else { - span_lint_and_sugg( - cx, - UNNECESSARY_TO_OWNED, - expr.span.with_lo(receiver.span.hi()), - &format!("unnecessary use of `{method_name}`"), - "remove this", - String::new(), - Applicability::MachineApplicable, - ); - } - return true; - } - } - if_chain! { - if let Some(as_ref_trait_id) = cx.tcx.get_diagnostic_item(sym::AsRef); - if implements_trait(cx, receiver_ty, as_ref_trait_id, &[GenericArg::from(target_ty)]); - then { - span_lint_and_sugg( - cx, - UNNECESSARY_TO_OWNED, - parent.span, - &format!("unnecessary use of `{method_name}`"), - "use", - format!("{receiver_snippet}.as_ref()"), - Applicability::MachineApplicable, - ); - return true; - } } + return true; + } + if let Some(as_ref_trait_id) = cx.tcx.get_diagnostic_item(sym::AsRef) + && implements_trait(cx, receiver_ty, as_ref_trait_id, &[GenericArg::from(target_ty)]) + { + span_lint_and_sugg( + cx, + UNNECESSARY_TO_OWNED, + parent.span, + &format!("unnecessary use of `{method_name}`"), + "use", + format!("{receiver_snippet}.as_ref()"), + Applicability::MachineApplicable, + ); + return true; } } false @@ -207,38 +199,36 @@ fn check_into_iter_call_arg( receiver: &Expr<'_>, msrv: &Msrv, ) -> bool { - if_chain! { - if let Some(parent) = get_parent_expr(cx, expr); - if let Some(callee_def_id) = fn_def_id(cx, parent); - if is_into_iter(cx, callee_def_id); - if let Some(iterator_trait_id) = cx.tcx.get_diagnostic_item(sym::Iterator); - let parent_ty = cx.typeck_results().expr_ty(parent); - if implements_trait(cx, parent_ty, iterator_trait_id, &[]); - if let Some(item_ty) = get_iterator_item_ty(cx, parent_ty); - if let Some(receiver_snippet) = snippet_opt(cx, receiver.span); - then { - if unnecessary_iter_cloned::check_for_loop_iter(cx, parent, method_name, receiver, true) { - return true; - } - let cloned_or_copied = if is_copy(cx, item_ty) && msrv.meets(msrvs::ITERATOR_COPIED) { - "copied" - } else { - "cloned" - }; - // The next suggestion may be incorrect because the removal of the `to_owned`-like - // function could cause the iterator to hold a reference to a resource that is used - // mutably. See https://github.com/rust-lang/rust-clippy/issues/8148. - span_lint_and_sugg( - cx, - UNNECESSARY_TO_OWNED, - parent.span, - &format!("unnecessary use of `{method_name}`"), - "use", - format!("{receiver_snippet}.iter().{cloned_or_copied}()"), - Applicability::MaybeIncorrect, - ); + if let Some(parent) = get_parent_expr(cx, expr) + && let Some(callee_def_id) = fn_def_id(cx, parent) + && is_into_iter(cx, callee_def_id) + && let Some(iterator_trait_id) = cx.tcx.get_diagnostic_item(sym::Iterator) + && let parent_ty = cx.typeck_results().expr_ty(parent) + && implements_trait(cx, parent_ty, iterator_trait_id, &[]) + && let Some(item_ty) = get_iterator_item_ty(cx, parent_ty) + && let Some(receiver_snippet) = snippet_opt(cx, receiver.span) + { + if unnecessary_iter_cloned::check_for_loop_iter(cx, parent, method_name, receiver, true) { return true; } + let cloned_or_copied = if is_copy(cx, item_ty) && msrv.meets(msrvs::ITERATOR_COPIED) { + "copied" + } else { + "cloned" + }; + // The next suggestion may be incorrect because the removal of the `to_owned`-like + // function could cause the iterator to hold a reference to a resource that is used + // mutably. See https://github.com/rust-lang/rust-clippy/issues/8148. + span_lint_and_sugg( + cx, + UNNECESSARY_TO_OWNED, + parent.span, + &format!("unnecessary use of `{method_name}`"), + "use", + format!("{receiver_snippet}.iter().{cloned_or_copied}()"), + Applicability::MaybeIncorrect, + ); + return true; } false } @@ -251,26 +241,25 @@ fn check_other_call_arg<'tcx>( method_name: Symbol, receiver: &'tcx Expr<'tcx>, ) -> bool { - if_chain! { - if let Some((maybe_call, maybe_arg)) = skip_addr_of_ancestors(cx, expr); - if let Some((callee_def_id, _, recv, call_args)) = get_callee_generic_args_and_args(cx, maybe_call); - let fn_sig = cx.tcx.fn_sig(callee_def_id).instantiate_identity().skip_binder(); - if let Some(i) = recv.into_iter().chain(call_args).position(|arg| arg.hir_id == maybe_arg.hir_id); - if let Some(input) = fn_sig.inputs().get(i); - let (input, n_refs) = peel_mid_ty_refs(*input); - if let (trait_predicates, _) = get_input_traits_and_projections(cx, callee_def_id, input); - if let Some(sized_def_id) = cx.tcx.lang_items().sized_trait(); - if let [trait_predicate] = trait_predicates + if let Some((maybe_call, maybe_arg)) = skip_addr_of_ancestors(cx, expr) + && let Some((callee_def_id, _, recv, call_args)) = get_callee_generic_args_and_args(cx, maybe_call) + && let fn_sig = cx.tcx.fn_sig(callee_def_id).instantiate_identity().skip_binder() + && let Some(i) = recv.into_iter().chain(call_args).position(|arg| arg.hir_id == maybe_arg.hir_id) + && let Some(input) = fn_sig.inputs().get(i) + && let (input, n_refs) = peel_mid_ty_refs(*input) + && let (trait_predicates, _) = get_input_traits_and_projections(cx, callee_def_id, input) + && let Some(sized_def_id) = cx.tcx.lang_items().sized_trait() + && let [trait_predicate] = trait_predicates .iter() .filter(|trait_predicate| trait_predicate.def_id() != sized_def_id) - .collect::<Vec<_>>()[..]; - if let Some(deref_trait_id) = cx.tcx.get_diagnostic_item(sym::Deref); - if let Some(as_ref_trait_id) = cx.tcx.get_diagnostic_item(sym::AsRef); - if trait_predicate.def_id() == deref_trait_id || trait_predicate.def_id() == as_ref_trait_id; - let receiver_ty = cx.typeck_results().expr_ty(receiver); + .collect::<Vec<_>>()[..] + && let Some(deref_trait_id) = cx.tcx.get_diagnostic_item(sym::Deref) + && let Some(as_ref_trait_id) = cx.tcx.get_diagnostic_item(sym::AsRef) + && (trait_predicate.def_id() == deref_trait_id || trait_predicate.def_id() == as_ref_trait_id) + && let receiver_ty = cx.typeck_results().expr_ty(receiver) // We can't add an `&` when the trait is `Deref` because `Target = &T` won't match // `Target = T`. - if let Some((n_refs, receiver_ty)) = if n_refs > 0 || is_copy(cx, receiver_ty) { + && let Some((n_refs, receiver_ty)) = if n_refs > 0 || is_copy(cx, receiver_ty) { Some((n_refs, receiver_ty)) } else if trait_predicate.def_id() != deref_trait_id { Some((1, Ty::new_ref(cx.tcx, @@ -282,21 +271,20 @@ fn check_other_call_arg<'tcx>( ))) } else { None - }; - if can_change_type(cx, maybe_arg, receiver_ty); - if let Some(receiver_snippet) = snippet_opt(cx, receiver.span); - then { - span_lint_and_sugg( - cx, - UNNECESSARY_TO_OWNED, - maybe_arg.span, - &format!("unnecessary use of `{method_name}`"), - "use", - format!("{:&>n_refs$}{receiver_snippet}", ""), - Applicability::MachineApplicable, - ); - return true; } + && can_change_type(cx, maybe_arg, receiver_ty) + && let Some(receiver_snippet) = snippet_opt(cx, receiver.span) + { + span_lint_and_sugg( + cx, + UNNECESSARY_TO_OWNED, + maybe_arg.span, + &format!("unnecessary use of `{method_name}`"), + "use", + format!("{:&>n_refs$}{receiver_snippet}", ""), + Applicability::MachineApplicable, + ); + return true; } false } @@ -328,22 +316,18 @@ fn get_callee_generic_args_and_args<'tcx>( Option<&'tcx Expr<'tcx>>, &'tcx [Expr<'tcx>], )> { - if_chain! { - if let ExprKind::Call(callee, args) = expr.kind; - let callee_ty = cx.typeck_results().expr_ty(callee); - if let ty::FnDef(callee_def_id, _) = callee_ty.kind(); - then { - let generic_args = cx.typeck_results().node_args(callee.hir_id); - return Some((*callee_def_id, generic_args, None, args)); - } + if let ExprKind::Call(callee, args) = expr.kind + && let callee_ty = cx.typeck_results().expr_ty(callee) + && let ty::FnDef(callee_def_id, _) = callee_ty.kind() + { + let generic_args = cx.typeck_results().node_args(callee.hir_id); + return Some((*callee_def_id, generic_args, None, args)); } - if_chain! { - if let ExprKind::MethodCall(_, recv, args, _) = expr.kind; - if let Some(method_def_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id); - then { - let generic_args = cx.typeck_results().node_args(expr.hir_id); - return Some((method_def_id, generic_args, Some(recv), args)); - } + if let ExprKind::MethodCall(_, recv, args, _) = expr.kind + && let Some(method_def_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id) + { + let generic_args = cx.typeck_results().node_args(expr.hir_id); + return Some((method_def_id, generic_args, Some(recv), args)); } None } @@ -458,7 +442,7 @@ fn can_change_type<'a>(cx: &LateContext<'a>, mut expr: &'a Expr<'a>, mut ty: Ty< return false; } - let output_ty = cx.tcx.erase_late_bound_regions(fn_sig.output()); + let output_ty = cx.tcx.instantiate_bound_regions_with_erased(fn_sig.output()); if output_ty.contains(param_ty) { if let Ok(new_ty) = cx.tcx.try_instantiate_and_normalize_erasing_regions( new_subst, diff --git a/src/tools/clippy/clippy_lints/src/methods/useless_asref.rs b/src/tools/clippy/clippy_lints/src/methods/useless_asref.rs index b5f810edd..84ee64e88 100644 --- a/src/tools/clippy/clippy_lints/src/methods/useless_asref.rs +++ b/src/tools/clippy/clippy_lints/src/methods/useless_asref.rs @@ -2,7 +2,6 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet_with_applicability; use clippy_utils::ty::walk_ptrs_ty_depth; use clippy_utils::{get_parent_expr, is_trait_method}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_lint::LateContext; @@ -22,13 +21,11 @@ pub(super) fn check(cx: &LateContext<'_>, expr: &hir::Expr<'_>, call_name: &str, let (base_rcv_ty, rcv_depth) = walk_ptrs_ty_depth(rcv_ty); if base_rcv_ty == base_res_ty && rcv_depth >= res_depth { // allow the `as_ref` or `as_mut` if it is followed by another method call - if_chain! { - if let Some(parent) = get_parent_expr(cx, expr); - if let hir::ExprKind::MethodCall(segment, ..) = parent.kind; - if segment.ident.span != expr.span; - then { - return; - } + if let Some(parent) = get_parent_expr(cx, expr) + && let hir::ExprKind::MethodCall(segment, ..) = parent.kind + && segment.ident.span != expr.span + { + return; } let mut applicability = Applicability::MachineApplicable; diff --git a/src/tools/clippy/clippy_lints/src/methods/utils.rs b/src/tools/clippy/clippy_lints/src/methods/utils.rs index 9f1f73e60..9ad4250a1 100644 --- a/src/tools/clippy/clippy_lints/src/methods/utils.rs +++ b/src/tools/clippy/clippy_lints/src/methods/utils.rs @@ -1,7 +1,6 @@ use clippy_utils::source::snippet_with_applicability; use clippy_utils::ty::is_type_diagnostic_item; use clippy_utils::{get_parent_expr, path_to_local_id, usage}; -use if_chain::if_chain; use rustc_ast::ast; use rustc_errors::Applicability; use rustc_hir as hir; @@ -55,32 +54,33 @@ pub(super) fn get_hint_if_single_char_arg( arg: &hir::Expr<'_>, applicability: &mut Applicability, ) -> Option<String> { - if_chain! { - if let hir::ExprKind::Lit(lit) = &arg.kind; - if let ast::LitKind::Str(r, style) = lit.node; - let string = r.as_str(); - if string.chars().count() == 1; - then { - let snip = snippet_with_applicability(cx, arg.span, string, applicability); - let ch = if let ast::StrStyle::Raw(nhash) = style { - let nhash = nhash as usize; - // for raw string: r##"a"## - &snip[(nhash + 2)..(snip.len() - 1 - nhash)] - } else { - // for regular string: "a" - &snip[1..(snip.len() - 1)] - }; + if let hir::ExprKind::Lit(lit) = &arg.kind + && let ast::LitKind::Str(r, style) = lit.node + && let string = r.as_str() + && string.chars().count() == 1 + { + let snip = snippet_with_applicability(cx, arg.span, string, applicability); + let ch = if let ast::StrStyle::Raw(nhash) = style { + let nhash = nhash as usize; + // for raw string: r##"a"## + &snip[(nhash + 2)..(snip.len() - 1 - nhash)] + } else { + // for regular string: "a" + &snip[1..(snip.len() - 1)] + }; - let hint = format!("'{}'", match ch { - "'" => "\\'" , + let hint = format!( + "'{}'", + match ch { + "'" => "\\'", r"\" => "\\\\", _ => ch, - }); + } + ); - Some(hint) - } else { - None - } + Some(hint) + } else { + None } } @@ -140,15 +140,13 @@ impl<'cx, 'tcx> Visitor<'tcx> for CloneOrCopyVisitor<'cx, 'tcx> { return; }, ExprKind::MethodCall(.., args, _) => { - if_chain! { - if args.iter().all(|arg| !self.is_binding(arg)); - if let Some(method_def_id) = self.cx.typeck_results().type_dependent_def_id(parent.hir_id); - let method_ty = self.cx.tcx.type_of(method_def_id).instantiate_identity(); - let self_ty = method_ty.fn_sig(self.cx.tcx).input(0).skip_binder(); - if matches!(self_ty.kind(), ty::Ref(_, _, Mutability::Not)); - then { - return; - } + if args.iter().all(|arg| !self.is_binding(arg)) + && let Some(method_def_id) = self.cx.typeck_results().type_dependent_def_id(parent.hir_id) + && let method_ty = self.cx.tcx.type_of(method_def_id).instantiate_identity() + && let self_ty = method_ty.fn_sig(self.cx.tcx).input(0).skip_binder() + && matches!(self_ty.kind(), ty::Ref(_, _, Mutability::Not)) + { + return; } }, _ => {}, diff --git a/src/tools/clippy/clippy_lints/src/methods/vec_resize_to_zero.rs b/src/tools/clippy/clippy_lints/src/methods/vec_resize_to_zero.rs index 730727186..9e87fb45a 100644 --- a/src/tools/clippy/clippy_lints/src/methods/vec_resize_to_zero.rs +++ b/src/tools/clippy/clippy_lints/src/methods/vec_resize_to_zero.rs @@ -1,6 +1,5 @@ use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::ty::is_type_diagnostic_item; -use if_chain::if_chain; use rustc_ast::LitKind; use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind}; @@ -17,29 +16,32 @@ pub(super) fn check<'tcx>( default_arg: &'tcx Expr<'_>, name_span: Span, ) { - if_chain! { - if let Some(method_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id); - if let Some(impl_id) = cx.tcx.impl_of_method(method_id); - if is_type_diagnostic_item(cx, cx.tcx.type_of(impl_id).instantiate_identity(), sym::Vec); - if let ExprKind::Lit(Spanned { node: LitKind::Int(0, _), .. }) = count_arg.kind; - if let ExprKind::Lit(Spanned { node: LitKind::Int(..), .. }) = default_arg.kind; - then { - let method_call_span = expr.span.with_lo(name_span.lo()); - span_lint_and_then( - cx, - VEC_RESIZE_TO_ZERO, - expr.span, - "emptying a vector with `resize`", - |db| { - db.help("the arguments may be inverted..."); - db.span_suggestion( - method_call_span, - "...or you can empty the vector with", - "clear()".to_string(), - Applicability::MaybeIncorrect, - ); - }, - ); - } + if let Some(method_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id) + && let Some(impl_id) = cx.tcx.impl_of_method(method_id) + && is_type_diagnostic_item(cx, cx.tcx.type_of(impl_id).instantiate_identity(), sym::Vec) + && let ExprKind::Lit(Spanned { + node: LitKind::Int(0, _), + .. + }) = count_arg.kind + && let ExprKind::Lit(Spanned { + node: LitKind::Int(..), .. + }) = default_arg.kind + { + let method_call_span = expr.span.with_lo(name_span.lo()); + span_lint_and_then( + cx, + VEC_RESIZE_TO_ZERO, + expr.span, + "emptying a vector with `resize`", + |db| { + db.help("the arguments may be inverted..."); + db.span_suggestion( + method_call_span, + "...or you can empty the vector with", + "clear()".to_string(), + Applicability::MaybeIncorrect, + ); + }, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/methods/zst_offset.rs b/src/tools/clippy/clippy_lints/src/methods/zst_offset.rs index e9f268da6..0b829d99a 100644 --- a/src/tools/clippy/clippy_lints/src/methods/zst_offset.rs +++ b/src/tools/clippy/clippy_lints/src/methods/zst_offset.rs @@ -1,5 +1,4 @@ use clippy_utils::diagnostics::span_lint; -use if_chain::if_chain; use rustc_hir as hir; use rustc_lint::LateContext; use rustc_middle::ty; @@ -7,12 +6,10 @@ use rustc_middle::ty; use super::ZST_OFFSET; pub(super) fn check(cx: &LateContext<'_>, expr: &hir::Expr<'_>, recv: &hir::Expr<'_>) { - if_chain! { - if let ty::RawPtr(ty::TypeAndMut { ty, .. }) = cx.typeck_results().expr_ty(recv).kind(); - if let Ok(layout) = cx.tcx.layout_of(cx.param_env.and(*ty)); - if layout.is_zst(); - then { - span_lint(cx, ZST_OFFSET, expr.span, "offset calculation on zero-sized value"); - } + if let ty::RawPtr(ty::TypeAndMut { ty, .. }) = cx.typeck_results().expr_ty(recv).kind() + && let Ok(layout) = cx.tcx.layout_of(cx.param_env.and(*ty)) + && layout.is_zst() + { + span_lint(cx, ZST_OFFSET, expr.span, "offset calculation on zero-sized value"); } } diff --git a/src/tools/clippy/clippy_lints/src/min_ident_chars.rs b/src/tools/clippy/clippy_lints/src/min_ident_chars.rs index 4ad12e899..34b8e0dbe 100644 --- a/src/tools/clippy/clippy_lints/src/min_ident_chars.rs +++ b/src/tools/clippy/clippy_lints/src/min_ident_chars.rs @@ -6,7 +6,7 @@ use rustc_hir::intravisit::{walk_item, Visitor}; use rustc_hir::{GenericParamKind, HirId, Item, ItemKind, ItemLocalId, Node, Pat, PatKind}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::Span; use std::borrow::Cow; @@ -91,7 +91,7 @@ impl Visitor<'_> for IdentVisitor<'_, '_> { let node = if hir_id.local_id == ItemLocalId::from_u32(0) { // In this case, we can just use `find`, `Owner`'s `node` field is private anyway so we can't // reimplement it even if we wanted to - cx.tcx.hir().find(hir_id) + cx.tcx.opt_hir_node(hir_id) } else { let Some(owner) = cx.tcx.hir_owner_nodes(hir_id.owner).as_owner() else { return; diff --git a/src/tools/clippy/clippy_lints/src/minmax.rs b/src/tools/clippy/clippy_lints/src/minmax.rs index e0904f17b..fca626fa5 100644 --- a/src/tools/clippy/clippy_lints/src/minmax.rs +++ b/src/tools/clippy/clippy_lints/src/minmax.rs @@ -3,7 +3,7 @@ use clippy_utils::diagnostics::span_lint; use clippy_utils::is_trait_method; use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; use std::cmp::Ordering; diff --git a/src/tools/clippy/clippy_lints/src/misc.rs b/src/tools/clippy/clippy_lints/src/misc.rs index f4af5f37b..b9784a585 100644 --- a/src/tools/clippy/clippy_lints/src/misc.rs +++ b/src/tools/clippy/clippy_lints/src/misc.rs @@ -5,7 +5,6 @@ use clippy_utils::{ any_parent_is_automatically_derived, fulfill_or_allowed, get_parent_expr, is_lint_allowed, iter_input_pats, last_path_segment, SpanlessEq, }; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::def::Res; use rustc_hir::intravisit::FnKind; @@ -14,7 +13,7 @@ use rustc_hir::{ }; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::def_id::LocalDefId; use rustc_span::Span; @@ -143,73 +142,64 @@ impl<'tcx> LateLintPass<'tcx> for LintPass { } fn check_stmt(&mut self, cx: &LateContext<'tcx>, stmt: &'tcx Stmt<'_>) { - if_chain! { - if !in_external_macro(cx.tcx.sess, stmt.span); - if let StmtKind::Local(local) = stmt.kind; - if let PatKind::Binding(BindingAnnotation(ByRef::Yes, mutabl), .., name, None) = local.pat.kind; - if let Some(init) = local.init; + if !in_external_macro(cx.tcx.sess, stmt.span) + && let StmtKind::Local(local) = stmt.kind + && let PatKind::Binding(BindingAnnotation(ByRef::Yes, mutabl), .., name, None) = local.pat.kind + && let Some(init) = local.init // Do not emit if clippy::ref_patterns is not allowed to avoid having two lints for the same issue. - if is_lint_allowed(cx, REF_PATTERNS, local.pat.hir_id); - then { - let ctxt = local.span.ctxt(); - let mut app = Applicability::MachineApplicable; - let sugg_init = Sugg::hir_with_context(cx, init, ctxt, "..", &mut app); - let (mutopt, initref) = if mutabl == Mutability::Mut { - ("mut ", sugg_init.mut_addr()) - } else { - ("", sugg_init.addr()) - }; - let tyopt = if let Some(ty) = local.ty { - let ty_snip = snippet_with_context(cx, ty.span, ctxt, "_", &mut app).0; - format!(": &{mutopt}{ty_snip}") - } else { - String::new() - }; - span_lint_hir_and_then( - cx, - TOPLEVEL_REF_ARG, - init.hir_id, - local.pat.span, - "`ref` on an entire `let` pattern is discouraged, take a reference with `&` instead", - |diag| { - diag.span_suggestion( - stmt.span, - "try", - format!( - "let {name}{tyopt} = {initref};", - name=snippet(cx, name.span, ".."), - ), - app, - ); - } - ); - } + && is_lint_allowed(cx, REF_PATTERNS, local.pat.hir_id) + { + let ctxt = local.span.ctxt(); + let mut app = Applicability::MachineApplicable; + let sugg_init = Sugg::hir_with_context(cx, init, ctxt, "..", &mut app); + let (mutopt, initref) = if mutabl == Mutability::Mut { + ("mut ", sugg_init.mut_addr()) + } else { + ("", sugg_init.addr()) + }; + let tyopt = if let Some(ty) = local.ty { + let ty_snip = snippet_with_context(cx, ty.span, ctxt, "_", &mut app).0; + format!(": &{mutopt}{ty_snip}") + } else { + String::new() + }; + span_lint_hir_and_then( + cx, + TOPLEVEL_REF_ARG, + init.hir_id, + local.pat.span, + "`ref` on an entire `let` pattern is discouraged, take a reference with `&` instead", + |diag| { + diag.span_suggestion( + stmt.span, + "try", + format!("let {name}{tyopt} = {initref};", name = snippet(cx, name.span, ".."),), + app, + ); + }, + ); }; - if_chain! { - if let StmtKind::Semi(expr) = stmt.kind; - if let ExprKind::Binary(ref binop, a, b) = expr.kind; - if binop.node == BinOpKind::And || binop.node == BinOpKind::Or; - if let Some(sugg) = Sugg::hir_opt(cx, a); - then { - span_lint_hir_and_then( - cx, - SHORT_CIRCUIT_STATEMENT, - expr.hir_id, - stmt.span, - "boolean short circuit operator in statement may be clearer using an explicit test", - |diag| { - let sugg = if binop.node == BinOpKind::Or { !sugg } else { sugg }; - diag.span_suggestion( - stmt.span, - "replace it with", - format!( - "if {sugg} {{ {}; }}", - &snippet(cx, b.span, ".."), - ), - Applicability::MachineApplicable, // snippet - ); - }); - } + if let StmtKind::Semi(expr) = stmt.kind + && let ExprKind::Binary(ref binop, a, b) = expr.kind + && (binop.node == BinOpKind::And || binop.node == BinOpKind::Or) + && let Some(sugg) = Sugg::hir_opt(cx, a) + { + span_lint_hir_and_then( + cx, + SHORT_CIRCUIT_STATEMENT, + expr.hir_id, + stmt.span, + "boolean short circuit operator in statement may be clearer using an explicit test", + |diag| { + let sugg = if binop.node == BinOpKind::Or { !sugg } else { sugg }; + diag.span_suggestion( + stmt.span, + "replace it with", + format!("if {sugg} {{ {}; }}", &snippet(cx, b.span, ".."),), + Applicability::MachineApplicable, // snippet + ); + }, + ); }; } diff --git a/src/tools/clippy/clippy_lints/src/misc_early/mod.rs b/src/tools/clippy/clippy_lints/src/misc_early/mod.rs index df0dd9e4e..abe5b00e8 100644 --- a/src/tools/clippy/clippy_lints/src/misc_early/mod.rs +++ b/src/tools/clippy/clippy_lints/src/misc_early/mod.rs @@ -16,7 +16,7 @@ use rustc_ast::visit::FnKind; use rustc_data_structures::fx::FxHashMap; use rustc_lint::{EarlyContext, EarlyLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::Span; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/mismatching_type_param_order.rs b/src/tools/clippy/clippy_lints/src/mismatching_type_param_order.rs index 0d79ece08..0739b49fe 100644 --- a/src/tools/clippy/clippy_lints/src/mismatching_type_param_order.rs +++ b/src/tools/clippy/clippy_lints/src/mismatching_type_param_order.rs @@ -4,7 +4,7 @@ use rustc_hir::def::{DefKind, Res}; use rustc_hir::{GenericArg, Item, ItemKind, QPath, Ty, TyKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::GenericParamDefKind; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does @@ -49,59 +49,59 @@ declare_lint_pass!(TypeParamMismatch => [MISMATCHING_TYPE_PARAM_ORDER]); impl<'tcx> LateLintPass<'tcx> for TypeParamMismatch { fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx Item<'tcx>) { - if_chain! { - if !item.span.from_expansion(); - if let ItemKind::Impl(imp) = &item.kind; - if let TyKind::Path(QPath::Resolved(_, path)) = &imp.self_ty.kind; - if let Some(segment) = path.segments.iter().next(); - if let Some(generic_args) = segment.args; - if !generic_args.args.is_empty(); - then { - // get the name and span of the generic parameters in the Impl - let mut impl_params = Vec::new(); - for p in generic_args.args { - match p { - GenericArg::Type(Ty {kind: TyKind::Path(QPath::Resolved(_, path)), ..}) => - impl_params.push((path.segments[0].ident.to_string(), path.span)), - GenericArg::Type(_) => return, - _ => (), - }; - } - - // find the type that the Impl is for - // only lint on struct/enum/union for now - let Res::Def(DefKind::Struct | DefKind::Enum | DefKind::Union, defid) = path.res else { - return + if !item.span.from_expansion() + && let ItemKind::Impl(imp) = &item.kind + && let TyKind::Path(QPath::Resolved(_, path)) = &imp.self_ty.kind + && let Some(segment) = path.segments.iter().next() + && let Some(generic_args) = segment.args + && !generic_args.args.is_empty() + { + // get the name and span of the generic parameters in the Impl + let mut impl_params = Vec::new(); + for p in generic_args.args { + match p { + GenericArg::Type(Ty { + kind: TyKind::Path(QPath::Resolved(_, path)), + .. + }) => impl_params.push((path.segments[0].ident.to_string(), path.span)), + GenericArg::Type(_) => return, + _ => (), }; + } + + // find the type that the Impl is for + // only lint on struct/enum/union for now + let Res::Def(DefKind::Struct | DefKind::Enum | DefKind::Union, defid) = path.res else { + return; + }; - // get the names of the generic parameters in the type - let type_params = &cx.tcx.generics_of(defid).params; - let type_param_names: Vec<_> = type_params.iter() - .filter_map(|p| - match p.kind { - GenericParamDefKind::Type {..} => Some(p.name.to_string()), - _ => None, - } - ).collect(); - // hashmap of name -> index for mismatch_param_name - let type_param_names_hashmap: FxHashMap<&String, usize> = - type_param_names.iter().enumerate().map(|(i, param)| (param, i)).collect(); + // get the names of the generic parameters in the type + let type_params = &cx.tcx.generics_of(defid).params; + let type_param_names: Vec<_> = type_params + .iter() + .filter_map(|p| match p.kind { + GenericParamDefKind::Type { .. } => Some(p.name.to_string()), + _ => None, + }) + .collect(); + // hashmap of name -> index for mismatch_param_name + let type_param_names_hashmap: FxHashMap<&String, usize> = type_param_names + .iter() + .enumerate() + .map(|(i, param)| (param, i)) + .collect(); - let type_name = segment.ident; - for (i, (impl_param_name, impl_param_span)) in impl_params.iter().enumerate() { - if mismatch_param_name(i, impl_param_name, &type_param_names_hashmap) { - let msg = format!("`{type_name}` has a similarly named generic type parameter `{impl_param_name}` in its declaration, but in a different order"); - let help = format!("try `{}`, or a name that does not conflict with `{type_name}`'s generic params", - type_param_names[i]); - span_lint_and_help( - cx, - MISMATCHING_TYPE_PARAM_ORDER, - *impl_param_span, - &msg, - None, - &help - ); - } + let type_name = segment.ident; + for (i, (impl_param_name, impl_param_span)) in impl_params.iter().enumerate() { + if mismatch_param_name(i, impl_param_name, &type_param_names_hashmap) { + let msg = format!( + "`{type_name}` has a similarly named generic type parameter `{impl_param_name}` in its declaration, but in a different order" + ); + let help = format!( + "try `{}`, or a name that does not conflict with `{type_name}`'s generic params", + type_param_names[i] + ); + span_lint_and_help(cx, MISMATCHING_TYPE_PARAM_ORDER, *impl_param_span, &msg, None, &help); } } } diff --git a/src/tools/clippy/clippy_lints/src/missing_assert_message.rs b/src/tools/clippy/clippy_lints/src/missing_assert_message.rs index 4e00215c5..04df7b7a7 100644 --- a/src/tools/clippy/clippy_lints/src/missing_assert_message.rs +++ b/src/tools/clippy/clippy_lints/src/missing_assert_message.rs @@ -3,7 +3,7 @@ use clippy_utils::macros::{find_assert_args, find_assert_eq_args, root_macro_cal use clippy_utils::{is_in_cfg_test, is_in_test_function}; use rustc_hir::Expr; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/missing_asserts_for_indexing.rs b/src/tools/clippy/clippy_lints/src/missing_asserts_for_indexing.rs index dccf72d3c..0f18e9434 100644 --- a/src/tools/clippy/clippy_lints/src/missing_asserts_for_indexing.rs +++ b/src/tools/clippy/clippy_lints/src/missing_asserts_for_indexing.rs @@ -9,9 +9,9 @@ use clippy_utils::{eq_expr_value, hash_expr, higher}; use rustc_ast::{LitKind, RangeLimits}; use rustc_data_structures::unhash::UnhashMap; use rustc_errors::{Applicability, Diagnostic}; -use rustc_hir::{BinOp, Block, Expr, ExprKind, UnOp}; +use rustc_hir::{BinOp, Block, Body, Expr, ExprKind, UnOp}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::source_map::Spanned; use rustc_span::{sym, Span}; @@ -52,12 +52,12 @@ declare_clippy_lint! { /// Use instead: /// ```no_run /// fn sum(v: &[u8]) -> u8 { - /// assert!(v.len() > 4); + /// assert!(v.len() > 3); /// // no bounds checks /// v[0] + v[1] + v[2] + v[3] /// } /// ``` - #[clippy::version = "1.70.0"] + #[clippy::version = "1.74.0"] pub MISSING_ASSERTS_FOR_INDEXING, restriction, "indexing into a slice multiple times without an `assert`" @@ -87,11 +87,14 @@ enum LengthComparison { LengthLessThanOrEqualInt, /// `5 <= v.len()` IntLessThanOrEqualLength, + /// `5 == v.len()` + /// `v.len() == 5` + LengthEqualInt, } /// Extracts parts out of a length comparison expression. /// -/// E.g. for `v.len() > 5` this returns `Some((LengthComparison::IntLessThanLength, 5, `v.len()`))` +/// E.g. for `v.len() > 5` this returns `Some((LengthComparison::IntLessThanLength, 5, v.len()))` fn len_comparison<'hir>( bin_op: BinOp, left: &'hir Expr<'hir>, @@ -114,6 +117,8 @@ fn len_comparison<'hir>( (Rel::Lt, _, int_lit_pat!(right)) => Some((LengthComparison::LengthLessThanInt, *right as usize, left)), (Rel::Le, int_lit_pat!(left), _) => Some((LengthComparison::IntLessThanOrEqualLength, *left as usize, right)), (Rel::Le, _, int_lit_pat!(right)) => Some((LengthComparison::LengthLessThanOrEqualInt, *right as usize, left)), + (Rel::Eq, int_lit_pat!(left), _) => Some((LengthComparison::LengthEqualInt, *left as usize, right)), + (Rel::Eq, _, int_lit_pat!(right)) => Some((LengthComparison::LengthEqualInt, *right as usize, left)), _ => None, } } @@ -316,11 +321,11 @@ fn report_indexes(cx: &LateContext<'_>, map: &UnhashMap<u64, Vec<IndexEntry<'_>> continue; }; - match entry { + match *entry { IndexEntry::AssertWithIndex { highest_index, asserted_len, - indexes, + ref indexes, comparison, assert_span, slice, @@ -343,6 +348,12 @@ fn report_indexes(cx: &LateContext<'_>, map: &UnhashMap<u64, Vec<IndexEntry<'_>> "assert!({}.len() > {highest_index})", snippet(cx, slice.span, "..") )), + // `highest_index` here is rather a length, so we need to add 1 to it + LengthComparison::LengthEqualInt if asserted_len < highest_index + 1 => Some(format!( + "assert!({}.len() == {})", + snippet(cx, slice.span, ".."), + highest_index + 1 + )), _ => None, }; @@ -354,7 +365,7 @@ fn report_indexes(cx: &LateContext<'_>, map: &UnhashMap<u64, Vec<IndexEntry<'_>> indexes, |diag| { diag.span_suggestion( - *assert_span, + assert_span, "provide the highest index that is indexed with", sugg, Applicability::MachineApplicable, @@ -364,7 +375,7 @@ fn report_indexes(cx: &LateContext<'_>, map: &UnhashMap<u64, Vec<IndexEntry<'_>> } }, IndexEntry::IndexWithoutAssert { - indexes, + ref indexes, highest_index, slice, } if indexes.len() > 1 => { @@ -390,10 +401,10 @@ fn report_indexes(cx: &LateContext<'_>, map: &UnhashMap<u64, Vec<IndexEntry<'_>> } impl LateLintPass<'_> for MissingAssertsForIndexing { - fn check_block(&mut self, cx: &LateContext<'_>, block: &Block<'_>) { + fn check_body(&mut self, cx: &LateContext<'_>, body: &Body<'_>) { let mut map = UnhashMap::default(); - for_each_expr(block, |expr| { + for_each_expr(body.value, |expr| { check_index(cx, expr, &mut map); check_assert(cx, expr, &mut map); ControlFlow::<!, ()>::Continue(()) diff --git a/src/tools/clippy/clippy_lints/src/missing_const_for_fn.rs b/src/tools/clippy/clippy_lints/src/missing_const_for_fn.rs index 97522cbe6..acaa6be30 100644 --- a/src/tools/clippy/clippy_lints/src/missing_const_for_fn.rs +++ b/src/tools/clippy/clippy_lints/src/missing_const_for_fn.rs @@ -9,7 +9,7 @@ use rustc_hir::intravisit::FnKind; use rustc_hir::{Body, Constness, FnDecl, GenericParamKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::def_id::LocalDefId; use rustc_span::Span; @@ -131,13 +131,13 @@ impl<'tcx> LateLintPass<'tcx> for MissingConstForFn { FnKind::Closure => return, } - let hir_id = cx.tcx.hir().local_def_id_to_hir_id(def_id); + let hir_id = cx.tcx.local_def_id_to_hir_id(def_id); // Const fns are not allowed as methods in a trait. { let parent = cx.tcx.hir().get_parent_item(hir_id).def_id; if parent != CRATE_DEF_ID { - if let hir::Node::Item(item) = cx.tcx.hir().get_by_def_id(parent) { + if let hir::Node::Item(item) = cx.tcx.hir_node_by_def_id(parent) { if let hir::ItemKind::Trait(..) = &item.kind { return; } diff --git a/src/tools/clippy/clippy_lints/src/missing_doc.rs b/src/tools/clippy/clippy_lints/src/missing_doc.rs index 973caa72b..bf4af7946 100644 --- a/src/tools/clippy/clippy_lints/src/missing_doc.rs +++ b/src/tools/clippy/clippy_lints/src/missing_doc.rs @@ -8,13 +8,12 @@ use clippy_utils::attrs::is_doc_hidden; use clippy_utils::diagnostics::span_lint; use clippy_utils::is_from_proc_macro; -use if_chain::if_chain; use rustc_ast::ast::{self, MetaItem, MetaItemKind}; use rustc_hir as hir; use rustc_hir::def_id::LocalDefId; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::ty::Visibility; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::def_id::CRATE_DEF_ID; use rustc_span::{sym, Span}; @@ -63,16 +62,14 @@ impl MissingDoc { } fn has_include(meta: Option<MetaItem>) -> bool { - if_chain! { - if let Some(meta) = meta; - if let MetaItemKind::List(list) = meta.kind; - if let Some(meta) = list.first(); - if let Some(name) = meta.ident(); - then { - name.name == sym::include - } else { - false - } + if let Some(meta) = meta + && let MetaItemKind::List(list) = meta.kind + && let Some(meta) = list.first() + && let Some(name) = meta.ident() + { + name.name == sym::include + } else { + false } } diff --git a/src/tools/clippy/clippy_lints/src/missing_enforced_import_rename.rs b/src/tools/clippy/clippy_lints/src/missing_enforced_import_rename.rs index 16ff98a59..c1f6c71a6 100644 --- a/src/tools/clippy/clippy_lints/src/missing_enforced_import_rename.rs +++ b/src/tools/clippy/clippy_lints/src/missing_enforced_import_rename.rs @@ -7,7 +7,7 @@ use rustc_hir::def::Res; use rustc_hir::def_id::DefId; use rustc_hir::{Item, ItemKind, UseKind}; use rustc_lint::{LateContext, LateLintPass, LintContext}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::Symbol; declare_clippy_lint! { @@ -72,13 +72,12 @@ impl LateLintPass<'_> for ImportRename { fn check_item(&mut self, cx: &LateContext<'_>, item: &Item<'_>) { if let ItemKind::Use(path, UseKind::Single) = &item.kind { for &res in &path.res { - if_chain! { - if let Res::Def(_, id) = res; - if let Some(name) = self.renames.get(&id); + if let Res::Def(_, id) = res + && let Some(name) = self.renames.get(&id) // Remove semicolon since it is not present for nested imports - let span_without_semi = cx.sess().source_map().span_until_char(item.span, ';'); - if let Some(snip) = snippet_opt(cx, span_without_semi); - if let Some(import) = match snip.split_once(" as ") { + && let span_without_semi = cx.sess().source_map().span_until_char(item.span, ';') + && let Some(snip) = snippet_opt(cx, span_without_semi) + && let Some(import) = match snip.split_once(" as ") { None => Some(snip.as_str()), Some((import, rename)) => { if rename.trim() == name.as_str() { @@ -87,20 +86,17 @@ impl LateLintPass<'_> for ImportRename { Some(import.trim()) } }, - }; - then { - span_lint_and_sugg( - cx, - MISSING_ENFORCED_IMPORT_RENAMES, - span_without_semi, - "this import should be renamed", - "try", - format!( - "{import} as {name}", - ), - Applicability::MachineApplicable, - ); } + { + span_lint_and_sugg( + cx, + MISSING_ENFORCED_IMPORT_RENAMES, + span_without_semi, + "this import should be renamed", + "try", + format!("{import} as {name}",), + Applicability::MachineApplicable, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/missing_fields_in_debug.rs b/src/tools/clippy/clippy_lints/src/missing_fields_in_debug.rs index 95f9df4e4..88b331dde 100644 --- a/src/tools/clippy/clippy_lints/src/missing_fields_in_debug.rs +++ b/src/tools/clippy/clippy_lints/src/missing_fields_in_debug.rs @@ -12,7 +12,7 @@ use rustc_hir::{ }; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::{Ty, TypeckResults}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::{sym, Span, Symbol}; declare_clippy_lint! { @@ -220,7 +220,7 @@ impl<'tcx> LateLintPass<'tcx> for MissingFieldsInDebug { && let self_ty = cx.tcx.type_of(self_path_did).skip_binder().peel_refs() && let Some(self_adt) = self_ty.ty_adt_def() && let Some(self_def_id) = self_adt.did().as_local() - && let Some(Node::Item(self_item)) = cx.tcx.hir().find_by_def_id(self_def_id) + && let Some(Node::Item(self_item)) = cx.tcx.opt_hir_node_by_def_id(self_def_id) // NB: can't call cx.typeck_results() as we are not in a body && let typeck_results = cx.tcx.typeck_body(*body_id) && should_lint(cx, typeck_results, block) diff --git a/src/tools/clippy/clippy_lints/src/missing_inline.rs b/src/tools/clippy/clippy_lints/src/missing_inline.rs index b815da79b..7393b39c8 100644 --- a/src/tools/clippy/clippy_lints/src/missing_inline.rs +++ b/src/tools/clippy/clippy_lints/src/missing_inline.rs @@ -1,8 +1,8 @@ use clippy_utils::diagnostics::span_lint; use rustc_ast::ast; use rustc_hir as hir; -use rustc_lint::{self, LateContext, LateLintPass, LintContext}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_lint::{LateContext, LateLintPass, LintContext}; +use rustc_session::declare_lint_pass; use rustc_span::{sym, Span}; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/missing_trait_methods.rs b/src/tools/clippy/clippy_lints/src/missing_trait_methods.rs index ad5f45a32..6bbf18d52 100644 --- a/src/tools/clippy/clippy_lints/src/missing_trait_methods.rs +++ b/src/tools/clippy/clippy_lints/src/missing_trait_methods.rs @@ -5,7 +5,7 @@ use rustc_hir::def_id::DefIdMap; use rustc_hir::{Impl, Item, ItemKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::AssocItem; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/mixed_read_write_in_expression.rs b/src/tools/clippy/clippy_lints/src/mixed_read_write_in_expression.rs index 215161b04..3ff40081c 100644 --- a/src/tools/clippy/clippy_lints/src/mixed_read_write_in_expression.rs +++ b/src/tools/clippy/clippy_lints/src/mixed_read_write_in_expression.rs @@ -1,11 +1,10 @@ use clippy_utils::diagnostics::{span_lint, span_lint_and_note}; use clippy_utils::{get_parent_expr, path_to_local, path_to_local_id}; -use if_chain::if_chain; use rustc_hir::intravisit::{walk_expr, Visitor}; use rustc_hir::{BinOpKind, Block, Expr, ExprKind, Guard, HirId, Local, Node, Stmt, StmtKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does @@ -80,11 +79,13 @@ declare_lint_pass!(EvalOrderDependence => [MIXED_READ_WRITE_IN_EXPRESSION, DIVER impl<'tcx> LateLintPass<'tcx> for EvalOrderDependence { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) { // Find a write to a local variable. - let var = if_chain! { - if let ExprKind::Assign(lhs, ..) | ExprKind::AssignOp(_, lhs, _) = expr.kind; - if let Some(var) = path_to_local(lhs); - if expr.span.desugaring_kind().is_none(); - then { var } else { return; } + let var = if let ExprKind::Assign(lhs, ..) | ExprKind::AssignOp(_, lhs, _) = expr.kind + && let Some(var) = path_to_local(lhs) + && expr.span.desugaring_kind().is_none() + { + var + } else { + return; }; let mut visitor = ReadVisitor { cx, @@ -164,7 +165,7 @@ impl<'a, 'tcx> Visitor<'tcx> for DivergenceVisitor<'a, 'tcx> { match typ.kind() { ty::FnDef(..) | ty::FnPtr(_) => { let sig = typ.fn_sig(self.cx.tcx); - if self.cx.tcx.erase_late_bound_regions(sig).output().kind() == &ty::Never { + if self.cx.tcx.instantiate_bound_regions_with_erased(sig).output().kind() == &ty::Never { self.report_diverging_sub_expr(e); } }, @@ -212,7 +213,9 @@ fn check_for_unsequenced_reads(vis: &mut ReadVisitor<'_, '_>) { if parent_id == cur_id { break; } - let Some(parent_node) = map.find(parent_id) else { break }; + let Some(parent_node) = vis.cx.tcx.opt_hir_node(parent_id) else { + break; + }; let stop_early = match parent_node { Node::Expr(expr) => check_expr(vis, expr), diff --git a/src/tools/clippy/clippy_lints/src/module_style.rs b/src/tools/clippy/clippy_lints/src/module_style.rs index efdc7560e..0226b31dd 100644 --- a/src/tools/clippy/clippy_lints/src/module_style.rs +++ b/src/tools/clippy/clippy_lints/src/module_style.rs @@ -1,7 +1,8 @@ +use clippy_utils::diagnostics::span_lint_and_help; use rustc_ast::ast; use rustc_data_structures::fx::{FxHashMap, FxHashSet}; use rustc_lint::{EarlyContext, EarlyLintPass, Level, LintContext}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::def_id::LOCAL_CRATE; use rustc_span::{FileName, SourceFile, Span, SyntaxContext}; use std::ffi::OsStr; @@ -124,11 +125,13 @@ impl EarlyLintPass for ModStyle { correct.pop(); correct.push(folder); correct.push("mod.rs"); - cx.struct_span_lint( + span_lint_and_help( + cx, SELF_NAMED_MODULE_FILES, Span::new(file.start_pos, file.start_pos, SyntaxContext::root(), None), - format!("`mod.rs` files are required, found `{}`", path.display()), - |lint| lint.help(format!("move `{}` to `{}`", path.display(), correct.display(),)), + &format!("`mod.rs` files are required, found `{}`", path.display()), + None, + &format!("move `{}` to `{}`", path.display(), correct.display(),), ); } } @@ -153,17 +156,22 @@ fn process_paths_for_mod_files<'a>( } /// Checks every path for the presence of `mod.rs` files and emits the lint if found. +/// We should not emit a lint for test modules in the presence of `mod.rs`. +/// Using `mod.rs` in integration tests is a [common pattern](https://doc.rust-lang.org/book/ch11-03-test-organization.html#submodules-in-integration-test) +/// for code-sharing between tests. fn check_self_named_mod_exists(cx: &EarlyContext<'_>, path: &Path, file: &SourceFile) { - if path.ends_with("mod.rs") { + if path.ends_with("mod.rs") && !path.starts_with("tests") { let mut mod_file = path.to_path_buf(); mod_file.pop(); mod_file.set_extension("rs"); - cx.struct_span_lint( + span_lint_and_help( + cx, MOD_MODULE_FILES, Span::new(file.start_pos, file.start_pos, SyntaxContext::root(), None), - format!("`mod.rs` files are not allowed, found `{}`", path.display()), - |lint| lint.help(format!("move `{}` to `{}`", path.display(), mod_file.display())), + &format!("`mod.rs` files are not allowed, found `{}`", path.display()), + None, + &format!("move `{}` to `{}`", path.display(), mod_file.display()), ); } } diff --git a/src/tools/clippy/clippy_lints/src/multi_assignments.rs b/src/tools/clippy/clippy_lints/src/multi_assignments.rs index b42dce7a1..9a6b1dfc5 100644 --- a/src/tools/clippy/clippy_lints/src/multi_assignments.rs +++ b/src/tools/clippy/clippy_lints/src/multi_assignments.rs @@ -1,7 +1,7 @@ use clippy_utils::diagnostics::span_lint; use rustc_ast::ast::{Expr, ExprKind, Stmt, StmtKind}; use rustc_lint::{EarlyContext, EarlyLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/multiple_unsafe_ops_per_block.rs b/src/tools/clippy/clippy_lints/src/multiple_unsafe_ops_per_block.rs index d4f8008ae..049f44f32 100644 --- a/src/tools/clippy/clippy_lints/src/multiple_unsafe_ops_per_block.rs +++ b/src/tools/clippy/clippy_lints/src/multiple_unsafe_ops_per_block.rs @@ -8,7 +8,7 @@ use rustc_hir as hir; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::lint::in_external_macro; use rustc_middle::ty; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::{DesugaringKind, Span}; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/mut_key.rs b/src/tools/clippy/clippy_lints/src/mut_key.rs index ebfd53f1e..04d2ced6a 100644 --- a/src/tools/clippy/clippy_lints/src/mut_key.rs +++ b/src/tools/clippy/clippy_lints/src/mut_key.rs @@ -6,10 +6,10 @@ use rustc_hir as hir; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::query::Key; use rustc_middle::ty::{Adt, Ty}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::def_id::LocalDefId; -use rustc_span::Span; use rustc_span::symbol::sym; +use rustc_span::Span; use std::iter; declare_clippy_lint! { @@ -143,7 +143,11 @@ impl MutableKeyType { for (hir_ty, ty) in iter::zip(decl.inputs, fn_sig.inputs().skip_binder()) { self.check_ty_(cx, hir_ty.span, *ty); } - self.check_ty_(cx, decl.output.span(), cx.tcx.erase_late_bound_regions(fn_sig.output())); + self.check_ty_( + cx, + decl.output.span(), + cx.tcx.instantiate_bound_regions_with_erased(fn_sig.output()), + ); } // We want to lint 1. sets or maps with 2. not immutable key types and 3. no unerased diff --git a/src/tools/clippy/clippy_lints/src/mut_mut.rs b/src/tools/clippy/clippy_lints/src/mut_mut.rs index 6989504a4..72a2cca1e 100644 --- a/src/tools/clippy/clippy_lints/src/mut_mut.rs +++ b/src/tools/clippy/clippy_lints/src/mut_mut.rs @@ -5,7 +5,7 @@ use rustc_hir::intravisit; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; use rustc_middle::ty; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/mut_reference.rs b/src/tools/clippy/clippy_lints/src/mut_reference.rs index 4f8e24422..f905a4e5b 100644 --- a/src/tools/clippy/clippy_lints/src/mut_reference.rs +++ b/src/tools/clippy/clippy_lints/src/mut_reference.rs @@ -2,7 +2,7 @@ use clippy_utils::diagnostics::span_lint; use rustc_hir::{BorrowKind, Expr, ExprKind, Mutability}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::{self, Ty}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use std::iter; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/mutable_debug_assertion.rs b/src/tools/clippy/clippy_lints/src/mutable_debug_assertion.rs index dea432fdb..96cd81ecd 100644 --- a/src/tools/clippy/clippy_lints/src/mutable_debug_assertion.rs +++ b/src/tools/clippy/clippy_lints/src/mutable_debug_assertion.rs @@ -5,7 +5,7 @@ use rustc_hir::{BorrowKind, Expr, ExprKind, MatchSource, Mutability}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::hir::nested_filter; use rustc_middle::ty; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::Span; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/mutex_atomic.rs b/src/tools/clippy/clippy_lints/src/mutex_atomic.rs index 9d8c06cd0..a23e12f7a 100644 --- a/src/tools/clippy/clippy_lints/src/mutex_atomic.rs +++ b/src/tools/clippy/clippy_lints/src/mutex_atomic.rs @@ -7,7 +7,7 @@ use clippy_utils::ty::is_type_diagnostic_item; use rustc_hir::Expr; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::{self, Ty}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/needless_arbitrary_self_type.rs b/src/tools/clippy/clippy_lints/src/needless_arbitrary_self_type.rs index 97e8f1c03..2ab83f733 100644 --- a/src/tools/clippy/clippy_lints/src/needless_arbitrary_self_type.rs +++ b/src/tools/clippy/clippy_lints/src/needless_arbitrary_self_type.rs @@ -1,9 +1,8 @@ use clippy_utils::diagnostics::span_lint_and_sugg; -use if_chain::if_chain; use rustc_ast::ast::{BindingAnnotation, ByRef, Lifetime, Mutability, Param, PatKind, Path, TyKind}; use rustc_errors::Applicability; use rustc_lint::{EarlyContext, EarlyLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::symbol::kw; use rustc_span::Span; @@ -66,48 +65,46 @@ enum Mode { } fn check_param_inner(cx: &EarlyContext<'_>, path: &Path, span: Span, binding_mode: &Mode, mutbl: Mutability) { - if_chain! { - if let [segment] = &path.segments[..]; - if segment.ident.name == kw::SelfUpper; - then { - // In case we have a named lifetime, we check if the name comes from expansion. - // If it does, at this point we know the rest of the parameter was written by the user, - // so let them decide what the name of the lifetime should be. - // See #6089 for more details. - let mut applicability = Applicability::MachineApplicable; - let self_param = match (binding_mode, mutbl) { - (Mode::Ref(None), Mutability::Mut) => "&mut self".to_string(), - (Mode::Ref(Some(lifetime)), Mutability::Mut) => { - if lifetime.ident.span.from_expansion() { - applicability = Applicability::HasPlaceholders; - "&'_ mut self".to_string() - } else { - format!("&{} mut self", &lifetime.ident.name) - } - }, - (Mode::Ref(None), Mutability::Not) => "&self".to_string(), - (Mode::Ref(Some(lifetime)), Mutability::Not) => { - if lifetime.ident.span.from_expansion() { - applicability = Applicability::HasPlaceholders; - "&'_ self".to_string() - } else { - format!("&{} self", &lifetime.ident.name) - } - }, - (Mode::Value, Mutability::Mut) => "mut self".to_string(), - (Mode::Value, Mutability::Not) => "self".to_string(), - }; + if let [segment] = &path.segments[..] + && segment.ident.name == kw::SelfUpper + { + // In case we have a named lifetime, we check if the name comes from expansion. + // If it does, at this point we know the rest of the parameter was written by the user, + // so let them decide what the name of the lifetime should be. + // See #6089 for more details. + let mut applicability = Applicability::MachineApplicable; + let self_param = match (binding_mode, mutbl) { + (Mode::Ref(None), Mutability::Mut) => "&mut self".to_string(), + (Mode::Ref(Some(lifetime)), Mutability::Mut) => { + if lifetime.ident.span.from_expansion() { + applicability = Applicability::HasPlaceholders; + "&'_ mut self".to_string() + } else { + format!("&{} mut self", &lifetime.ident.name) + } + }, + (Mode::Ref(None), Mutability::Not) => "&self".to_string(), + (Mode::Ref(Some(lifetime)), Mutability::Not) => { + if lifetime.ident.span.from_expansion() { + applicability = Applicability::HasPlaceholders; + "&'_ self".to_string() + } else { + format!("&{} self", &lifetime.ident.name) + } + }, + (Mode::Value, Mutability::Mut) => "mut self".to_string(), + (Mode::Value, Mutability::Not) => "self".to_string(), + }; - span_lint_and_sugg( - cx, - NEEDLESS_ARBITRARY_SELF_TYPE, - span, - "the type of the `self` parameter does not need to be arbitrary", - "consider to change this parameter to", - self_param, - applicability, - ) - } + span_lint_and_sugg( + cx, + NEEDLESS_ARBITRARY_SELF_TYPE, + span, + "the type of the `self` parameter does not need to be arbitrary", + "consider to change this parameter to", + self_param, + applicability, + ); } } @@ -125,12 +122,10 @@ impl EarlyLintPass for NeedlessArbitrarySelfType { } }, TyKind::Ref(lifetime, mut_ty) => { - if_chain! { - if let TyKind::Path(None, path) = &mut_ty.ty.kind; - if let PatKind::Ident(BindingAnnotation::NONE, _, _) = p.pat.kind; - then { - check_param_inner(cx, path, p.span.to(p.ty.span), &Mode::Ref(*lifetime), mut_ty.mutbl); - } + if let TyKind::Path(None, path) = &mut_ty.ty.kind + && let PatKind::Ident(BindingAnnotation::NONE, _, _) = p.pat.kind + { + check_param_inner(cx, path, p.span.to(p.ty.span), &Mode::Ref(*lifetime), mut_ty.mutbl); } }, _ => {}, diff --git a/src/tools/clippy/clippy_lints/src/needless_bool.rs b/src/tools/clippy/clippy_lints/src/needless_bool.rs index 02c177c92..218ca5e80 100644 --- a/src/tools/clippy/clippy_lints/src/needless_bool.rs +++ b/src/tools/clippy/clippy_lints/src/needless_bool.rs @@ -13,7 +13,7 @@ use rustc_ast::ast::LitKind; use rustc_errors::Applicability; use rustc_hir::{BinOpKind, Block, Expr, ExprKind, HirId, Node, UnOp}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::source_map::Spanned; use rustc_span::Span; diff --git a/src/tools/clippy/clippy_lints/src/needless_borrowed_ref.rs b/src/tools/clippy/clippy_lints/src/needless_borrowed_ref.rs index fdb91f0dc..4710a6944 100644 --- a/src/tools/clippy/clippy_lints/src/needless_borrowed_ref.rs +++ b/src/tools/clippy/clippy_lints/src/needless_borrowed_ref.rs @@ -2,7 +2,7 @@ use clippy_utils::diagnostics::span_lint_and_then; use rustc_errors::Applicability; use rustc_hir::{BindingAnnotation, Mutability, Node, Pat, PatKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/needless_borrows_for_generic_args.rs b/src/tools/clippy/clippy_lints/src/needless_borrows_for_generic_args.rs index dcfb109a4..a32bca3d0 100644 --- a/src/tools/clippy/clippy_lints/src/needless_borrows_for_generic_args.rs +++ b/src/tools/clippy/clippy_lints/src/needless_borrows_for_generic_args.rs @@ -2,7 +2,7 @@ use clippy_config::msrvs::{self, Msrv}; use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::mir::{enclosing_mir, expr_local, local_assignments, used_exactly_once, PossibleBorrowerMap}; use clippy_utils::source::snippet_with_context; -use clippy_utils::ty::is_copy; +use clippy_utils::ty::{implements_trait, is_copy}; use clippy_utils::{expr_use_ctxt, peel_n_hir_expr_refs, DefinedTy, ExprUseNode}; use rustc_errors::Applicability; use rustc_hir::def::{DefKind, Res}; @@ -15,7 +15,7 @@ use rustc_middle::mir::{Rvalue, StatementKind}; use rustc_middle::ty::{ self, ClauseKind, EarlyBinder, FnSig, GenericArg, GenericArgKind, List, ParamTy, ProjectionPredicate, Ty, }; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::symbol::sym; use rustc_trait_selection::traits::query::evaluate_obligation::InferCtxtExt as _; use rustc_trait_selection::traits::{Obligation, ObligationCause}; @@ -50,7 +50,7 @@ declare_clippy_lint! { /// let x = "foo"; /// f(x); /// ``` - #[clippy::version = "pre 1.29.0"] + #[clippy::version = "1.74.0"] pub NEEDLESS_BORROWS_FOR_GENERIC_ARGS, style, "taking a reference that is going to be automatically dereferenced" @@ -169,6 +169,7 @@ fn needless_borrow_count<'tcx>( ) -> usize { let destruct_trait_def_id = cx.tcx.lang_items().destruct_trait(); let sized_trait_def_id = cx.tcx.lang_items().sized_trait(); + let drop_trait_def_id = cx.tcx.lang_items().drop_trait(); let fn_sig = cx.tcx.fn_sig(fn_id).instantiate_identity().skip_binder(); let predicates = cx.tcx.param_env(fn_id).caller_bounds(); @@ -223,7 +224,14 @@ fn needless_borrow_count<'tcx>( // elements are modified each time `check_referent` is called. let mut args_with_referent_ty = callee_args.to_vec(); - let mut check_reference_and_referent = |reference, referent| { + let mut check_reference_and_referent = |reference: &Expr<'tcx>, referent: &Expr<'tcx>| { + if let ExprKind::Field(base, _) = &referent.kind { + let base_ty = cx.typeck_results().expr_ty(base); + if drop_trait_def_id.map_or(false, |id| implements_trait(cx, base_ty, id, &[])) { + return false; + } + } + let referent_ty = cx.typeck_results().expr_ty(referent); if !is_copy(cx, referent_ty) diff --git a/src/tools/clippy/clippy_lints/src/needless_continue.rs b/src/tools/clippy/clippy_lints/src/needless_continue.rs index cb2738947..4b9ab50e4 100644 --- a/src/tools/clippy/clippy_lints/src/needless_continue.rs +++ b/src/tools/clippy/clippy_lints/src/needless_continue.rs @@ -37,7 +37,7 @@ use clippy_utils::diagnostics::span_lint_and_help; use clippy_utils::source::{indent_of, snippet, snippet_block}; use rustc_ast::ast; use rustc_lint::{EarlyContext, EarlyLintPass, LintContext}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::Span; declare_clippy_lint! { @@ -362,21 +362,19 @@ fn suggestion_snippet_for_continue_inside_else(cx: &EarlyContext<'_>, data: &Lin } fn check_and_warn(cx: &EarlyContext<'_>, expr: &ast::Expr) { - if_chain! { - if let ast::ExprKind::Loop(loop_block, ..) = &expr.kind; - if let Some(last_stmt) = loop_block.stmts.last(); - if let ast::StmtKind::Expr(inner_expr) | ast::StmtKind::Semi(inner_expr) = &last_stmt.kind; - if let ast::ExprKind::Continue(_) = inner_expr.kind; - then { - span_lint_and_help( - cx, - NEEDLESS_CONTINUE, - last_stmt.span, - MSG_REDUNDANT_CONTINUE_EXPRESSION, - None, - DROP_CONTINUE_EXPRESSION_MSG, - ); - } + if let ast::ExprKind::Loop(loop_block, ..) = &expr.kind + && let Some(last_stmt) = loop_block.stmts.last() + && let ast::StmtKind::Expr(inner_expr) | ast::StmtKind::Semi(inner_expr) = &last_stmt.kind + && let ast::ExprKind::Continue(_) = inner_expr.kind + { + span_lint_and_help( + cx, + NEEDLESS_CONTINUE, + last_stmt.span, + MSG_REDUNDANT_CONTINUE_EXPRESSION, + None, + DROP_CONTINUE_EXPRESSION_MSG, + ); } with_loop_block(expr, |loop_block, label| { for (i, stmt) in loop_block.stmts.iter().enumerate() { diff --git a/src/tools/clippy/clippy_lints/src/needless_else.rs b/src/tools/clippy/clippy_lints/src/needless_else.rs index d881c13f8..b6aad69d1 100644 --- a/src/tools/clippy/clippy_lints/src/needless_else.rs +++ b/src/tools/clippy/clippy_lints/src/needless_else.rs @@ -3,7 +3,7 @@ use clippy_utils::source::{snippet_opt, trim_span}; use rustc_ast::ast::{Expr, ExprKind}; use rustc_errors::Applicability; use rustc_lint::{EarlyContext, EarlyLintPass, LintContext}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/needless_for_each.rs b/src/tools/clippy/clippy_lints/src/needless_for_each.rs index c71996131..84a07df1b 100644 --- a/src/tools/clippy/clippy_lints/src/needless_for_each.rs +++ b/src/tools/clippy/clippy_lints/src/needless_for_each.rs @@ -2,11 +2,9 @@ use rustc_errors::Applicability; use rustc_hir::intravisit::{walk_expr, Visitor}; use rustc_hir::{Closure, Expr, ExprKind, Stmt, StmtKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::{sym, Span, Symbol}; -use if_chain::if_chain; - use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::is_trait_method; use clippy_utils::source::snippet_with_applicability; @@ -51,65 +49,63 @@ impl<'tcx> LateLintPass<'tcx> for NeedlessForEach { return; }; - if_chain! { + if let ExprKind::MethodCall(method_name, for_each_recv, [for_each_arg], _) = expr.kind // Check the method name is `for_each`. - if let ExprKind::MethodCall(method_name, for_each_recv, [for_each_arg], _) = expr.kind; - if method_name.ident.name == Symbol::intern("for_each"); + && method_name.ident.name == Symbol::intern("for_each") // Check `for_each` is an associated function of `Iterator`. - if is_trait_method(cx, expr, sym::Iterator); + && is_trait_method(cx, expr, sym::Iterator) // Checks the receiver of `for_each` is also a method call. - if let ExprKind::MethodCall(_, iter_recv, [], _) = for_each_recv.kind; + && let ExprKind::MethodCall(_, iter_recv, [], _) = for_each_recv.kind // Skip the lint if the call chain is too long. e.g. `v.field.iter().for_each()` or // `v.foo().iter().for_each()` must be skipped. - if matches!( + && matches!( iter_recv.kind, ExprKind::Array(..) | ExprKind::Call(..) | ExprKind::Path(..) - ); + ) // Checks the type of the `iter` method receiver is NOT a user defined type. - if has_iter_method(cx, cx.typeck_results().expr_ty(iter_recv)).is_some(); + && has_iter_method(cx, cx.typeck_results().expr_ty(iter_recv)).is_some() // Skip the lint if the body is not block because this is simpler than `for` loop. // e.g. `v.iter().for_each(f)` is simpler and clearer than using `for` loop. - if let ExprKind::Closure(&Closure { body, .. }) = for_each_arg.kind; - let body = cx.tcx.hir().body(body); - if let ExprKind::Block(..) = body.value.kind; - then { - let mut ret_collector = RetCollector::default(); - ret_collector.visit_expr(body.value); - - // Skip the lint if `return` is used in `Loop` in order not to suggest using `'label`. - if ret_collector.ret_in_loop { - return; - } - - let (mut applicability, ret_suggs) = if ret_collector.spans.is_empty() { - (Applicability::MachineApplicable, None) - } else { - ( - Applicability::MaybeIncorrect, - Some( - ret_collector - .spans - .into_iter() - .map(|span| (span, "continue".to_string())) - .collect(), - ), - ) - }; + && let ExprKind::Closure(&Closure { body, .. }) = for_each_arg.kind + && let body = cx.tcx.hir().body(body) + && let ExprKind::Block(..) = body.value.kind + { + let mut ret_collector = RetCollector::default(); + ret_collector.visit_expr(body.value); + + // Skip the lint if `return` is used in `Loop` in order not to suggest using `'label`. + if ret_collector.ret_in_loop { + return; + } - let sugg = format!( - "for {} in {} {}", - snippet_with_applicability(cx, body.params[0].pat.span, "..", &mut applicability), - snippet_with_applicability(cx, for_each_recv.span, "..", &mut applicability), - snippet_with_applicability(cx, body.value.span, "..", &mut applicability), - ); + let (mut applicability, ret_suggs) = if ret_collector.spans.is_empty() { + (Applicability::MachineApplicable, None) + } else { + ( + Applicability::MaybeIncorrect, + Some( + ret_collector + .spans + .into_iter() + .map(|span| (span, "continue".to_string())) + .collect(), + ), + ) + }; + + let sugg = format!( + "for {} in {} {}", + snippet_with_applicability(cx, body.params[0].pat.span, "..", &mut applicability), + snippet_with_applicability(cx, for_each_recv.span, "..", &mut applicability), + snippet_with_applicability(cx, body.value.span, "..", &mut applicability), + ); - span_lint_and_then(cx, NEEDLESS_FOR_EACH, stmt.span, "needless use of `for_each`", |diag| { - diag.span_suggestion(stmt.span, "try", sugg, applicability); - if let Some(ret_suggs) = ret_suggs { - diag.multipart_suggestion("...and replace `return` with `continue`", ret_suggs, applicability); - } - }) - } + span_lint_and_then(cx, NEEDLESS_FOR_EACH, stmt.span, "needless use of `for_each`", |diag| { + diag.span_suggestion(stmt.span, "try", sugg, applicability); + if let Some(ret_suggs) = ret_suggs { + diag.multipart_suggestion("...and replace `return` with `continue`", ret_suggs, applicability); + } + }); } } } diff --git a/src/tools/clippy/clippy_lints/src/needless_if.rs b/src/tools/clippy/clippy_lints/src/needless_if.rs index 23aabc548..51bee4b51 100644 --- a/src/tools/clippy/clippy_lints/src/needless_if.rs +++ b/src/tools/clippy/clippy_lints/src/needless_if.rs @@ -6,7 +6,7 @@ use rustc_errors::Applicability; use rustc_hir::{ExprKind, Stmt, StmtKind}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/needless_late_init.rs b/src/tools/clippy/clippy_lints/src/needless_late_init.rs index c8888c744..3e63c0a1d 100644 --- a/src/tools/clippy/clippy_lints/src/needless_late_init.rs +++ b/src/tools/clippy/clippy_lints/src/needless_late_init.rs @@ -10,7 +10,7 @@ use rustc_hir::{ StmtKind, }; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::Span; declare_clippy_lint! { @@ -128,21 +128,18 @@ impl LocalAssign { let assign = match expr.kind { ExprKind::Block(Block { expr: Some(expr), .. }, _) => Self::from_expr(expr, expr.span), ExprKind::Block(block, _) => { - if_chain! { - if let Some((last, other_stmts)) = block.stmts.split_last(); - if let StmtKind::Expr(expr) | StmtKind::Semi(expr) = last.kind; + if let Some((last, other_stmts)) = block.stmts.split_last() + && let StmtKind::Expr(expr) | StmtKind::Semi(expr) = last.kind - let assign = Self::from_expr(expr, last.span)?; + && let assign = Self::from_expr(expr, last.span)? // avoid visiting if not needed - if assign.lhs_id == binding_id; - if other_stmts.iter().all(|stmt| !contains_assign_expr(cx, stmt)); - - then { - Some(assign) - } else { - None - } + && assign.lhs_id == binding_id + && other_stmts.iter().all(|stmt| !contains_assign_expr(cx, stmt)) + { + Some(assign) + } else { + None } }, ExprKind::Assign(..) => Self::from_expr(expr, expr.span), @@ -368,22 +365,20 @@ fn check<'tcx>( impl<'tcx> LateLintPass<'tcx> for NeedlessLateInit { fn check_local(&mut self, cx: &LateContext<'tcx>, local: &'tcx Local<'tcx>) { let mut parents = cx.tcx.hir().parent_iter(local.hir_id); - if_chain! { - if let Local { - init: None, - pat: &Pat { + if let Local { + init: None, + pat: + &Pat { kind: PatKind::Binding(BindingAnnotation::NONE, binding_id, _, None), .. }, - source: LocalSource::Normal, - .. - } = local; - if let Some((_, Node::Stmt(local_stmt))) = parents.next(); - if let Some((_, Node::Block(block))) = parents.next(); - - then { - check(cx, local, local_stmt, block, binding_id); - } + source: LocalSource::Normal, + .. + } = local + && let Some((_, Node::Stmt(local_stmt))) = parents.next() + && let Some((_, Node::Block(block))) = parents.next() + { + check(cx, local, local_stmt, block, binding_id); } } } diff --git a/src/tools/clippy/clippy_lints/src/needless_parens_on_range_literals.rs b/src/tools/clippy/clippy_lints/src/needless_parens_on_range_literals.rs index 7bbf1fb4c..8a6210637 100644 --- a/src/tools/clippy/clippy_lints/src/needless_parens_on_range_literals.rs +++ b/src/tools/clippy/clippy_lints/src/needless_parens_on_range_literals.rs @@ -7,7 +7,7 @@ use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does @@ -53,21 +53,23 @@ fn check_for_parens(cx: &LateContext<'_>, e: &Expr<'_>, is_start: bool) { // don't check floating point literals on the start expression of a range return; } - if_chain! { - if let ExprKind::Lit(literal) = e.kind; + if let ExprKind::Lit(literal) = e.kind // the indicator that parenthesis surround the literal is that the span of the expression and the literal differ - if (literal.span.data().hi - literal.span.data().lo) != (e.span.data().hi - e.span.data().lo); + && (literal.span.data().hi - literal.span.data().lo) != (e.span.data().hi - e.span.data().lo) // inspect the source code of the expression for parenthesis - if snippet_enclosed_in_parenthesis(&snippet(cx, e.span, "")); - then { - let mut applicability = Applicability::MachineApplicable; - span_lint_and_then(cx, NEEDLESS_PARENS_ON_RANGE_LITERALS, e.span, - "needless parenthesis on range literals can be removed", - |diag| { - let suggestion = snippet_with_applicability(cx, literal.span, "_", &mut applicability); - diag.span_suggestion(e.span, "try", suggestion, applicability); - }); - } + && snippet_enclosed_in_parenthesis(&snippet(cx, e.span, "")) + { + let mut applicability = Applicability::MachineApplicable; + span_lint_and_then( + cx, + NEEDLESS_PARENS_ON_RANGE_LITERALS, + e.span, + "needless parenthesis on range literals can be removed", + |diag| { + let suggestion = snippet_with_applicability(cx, literal.span, "_", &mut applicability); + diag.span_suggestion(e.span, "try", suggestion, applicability); + }, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/needless_pass_by_ref_mut.rs b/src/tools/clippy/clippy_lints/src/needless_pass_by_ref_mut.rs index d610ba520..64ef709e2 100644 --- a/src/tools/clippy/clippy_lints/src/needless_pass_by_ref_mut.rs +++ b/src/tools/clippy/clippy_lints/src/needless_pass_by_ref_mut.rs @@ -17,7 +17,7 @@ use rustc_middle::hir::map::associated_body; use rustc_middle::hir::nested_filter::OnlyBodies; use rustc_middle::mir::FakeReadCause; use rustc_middle::ty::{self, Ty, TyCtxt, UpvarId, UpvarPath}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::def_id::LocalDefId; use rustc_span::symbol::kw; use rustc_span::Span; @@ -113,8 +113,9 @@ fn check_closures<'tcx>( } ctx.prev_bind = None; ctx.prev_move_to_closure.clear(); - if let Some(body) = hir - .find_by_def_id(closure) + if let Some(body) = cx + .tcx + .opt_hir_node_by_def_id(closure) .and_then(associated_body) .map(|(_, body_id)| hir.body(body_id)) { @@ -137,7 +138,7 @@ impl<'tcx> LateLintPass<'tcx> for NeedlessPassByRefMut<'tcx> { return; } - let hir_id = cx.tcx.hir().local_def_id_to_hir_id(fn_def_id); + let hir_id = cx.tcx.local_def_id_to_hir_id(fn_def_id); let is_async = match kind { FnKind::ItemFn(.., header) => { if header.is_unsafe() { @@ -256,7 +257,7 @@ impl<'tcx> LateLintPass<'tcx> for NeedlessPassByRefMut<'tcx> { span_lint_hir_and_then( cx, NEEDLESS_PASS_BY_REF_MUT, - cx.tcx.hir().local_def_id_to_hir_id(*fn_def_id), + cx.tcx.local_def_id_to_hir_id(*fn_def_id), sp, "this argument is a mutable reference, but not used mutably", |diag| { @@ -412,7 +413,7 @@ impl<'tcx> euv::Delegate<'tcx> for MutablyUsedVariablesCtxt<'tcx> { ], ), .. - }) = self.tcx.hir().get(cmt.hir_id) + }) = self.tcx.hir_node(cmt.hir_id) { self.async_closures.insert(*def_id); } @@ -521,7 +522,7 @@ impl<'tcx> Visitor<'tcx> for FnNeedsMutVisitor<'_, 'tcx> { let Self { cx, used_fn_def_ids } = self; // #11182; do not lint if mutability is required elsewhere - if let Node::Expr(expr) = cx.tcx.hir().get(hir_id) + if let Node::Expr(expr) = cx.tcx.hir_node(hir_id) && let Some(parent) = get_parent_node(cx.tcx, expr.hir_id) && let ty::FnDef(def_id, _) = cx .tcx diff --git a/src/tools/clippy/clippy_lints/src/needless_pass_by_value.rs b/src/tools/clippy/clippy_lints/src/needless_pass_by_value.rs index 8fa461ac1..2c5c3dcaa 100644 --- a/src/tools/clippy/clippy_lints/src/needless_pass_by_value.rs +++ b/src/tools/clippy/clippy_lints/src/needless_pass_by_value.rs @@ -5,7 +5,6 @@ use clippy_utils::source::{snippet, snippet_opt}; use clippy_utils::ty::{ implements_trait, implements_trait_with_env_from_iter, is_copy, is_type_diagnostic_item, is_type_lang_item, }; -use if_chain::if_chain; use rustc_ast::ast::Attribute; use rustc_errors::{Applicability, Diagnostic}; use rustc_hir::intravisit::FnKind; @@ -18,7 +17,7 @@ use rustc_infer::infer::TyCtxtInferExt; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::mir::FakeReadCause; use rustc_middle::ty::{self, Ty, TypeVisitableExt}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::def_id::LocalDefId; use rustc_span::symbol::kw; use rustc_span::{sym, Span}; @@ -87,7 +86,7 @@ impl<'tcx> LateLintPass<'tcx> for NeedlessPassByValue { return; } - let hir_id = cx.tcx.hir().local_def_id_to_hir_id(fn_def_id); + let hir_id = cx.tcx.local_def_id_to_hir_id(fn_def_id); match kind { FnKind::ItemFn(.., header) => { @@ -177,118 +176,120 @@ impl<'tcx> LateLintPass<'tcx> for NeedlessPassByValue { ) }; - if_chain! { - if !is_self(arg); - if !ty.is_mutable_ptr(); - if !is_copy(cx, ty); - if ty.is_sized(cx.tcx, cx.param_env); - if !allowed_traits.iter().any(|&t| implements_trait_with_env_from_iter( - cx.tcx, - cx.param_env, - ty, - t, - [Option::<ty::GenericArg<'tcx>>::None], - )); - if !implements_borrow_trait; - if !all_borrowable_trait; - - if let PatKind::Binding(BindingAnnotation(_, Mutability::Not), canonical_id, ..) = arg.pat.kind; - if !moved_vars.contains(&canonical_id); - then { - // Dereference suggestion - let sugg = |diag: &mut Diagnostic| { - if let ty::Adt(def, ..) = ty.kind() { - if let Some(span) = cx.tcx.hir().span_if_local(def.did()) { - if type_allowed_to_implement_copy( - cx.tcx, - cx.param_env, - ty, - traits::ObligationCause::dummy_with_span(span), - ).is_ok() { - diag.span_help(span, "consider marking this type as `Copy`"); - } + if !is_self(arg) + && !ty.is_mutable_ptr() + && !is_copy(cx, ty) + && ty.is_sized(cx.tcx, cx.param_env) + && !allowed_traits.iter().any(|&t| { + implements_trait_with_env_from_iter( + cx.tcx, + cx.param_env, + ty, + t, + None, + [Option::<ty::GenericArg<'tcx>>::None], + ) + }) + && !implements_borrow_trait + && !all_borrowable_trait + && let PatKind::Binding(BindingAnnotation(_, Mutability::Not), canonical_id, ..) = arg.pat.kind + && !moved_vars.contains(&canonical_id) + { + // Dereference suggestion + let sugg = |diag: &mut Diagnostic| { + if let ty::Adt(def, ..) = ty.kind() { + if let Some(span) = cx.tcx.hir().span_if_local(def.did()) { + if type_allowed_to_implement_copy( + cx.tcx, + cx.param_env, + ty, + traits::ObligationCause::dummy_with_span(span), + ) + .is_ok() + { + diag.span_help(span, "consider marking this type as `Copy`"); } } + } - if_chain! { - if is_type_diagnostic_item(cx, ty, sym::Vec); - if let Some(clone_spans) = - get_spans(cx, Some(body.id()), idx, &[("clone", ".to_owned()")]); - if let TyKind::Path(QPath::Resolved(_, path)) = input.kind; - if let Some(elem_ty) = path.segments.iter() - .find(|seg| seg.ident.name == sym::Vec) - .and_then(|ps| ps.args.as_ref()) - .map(|params| params.args.iter().find_map(|arg| match arg { - GenericArg::Type(ty) => Some(ty), - _ => None, - }).unwrap()); - then { - let slice_ty = format!("&[{}]", snippet(cx, elem_ty.span, "_")); - diag.span_suggestion( - input.span, - "consider changing the type to", - slice_ty, - Applicability::Unspecified, - ); - - for (span, suggestion) in clone_spans { - diag.span_suggestion( - span, - snippet_opt(cx, span) - .map_or( - "change the call to".into(), - |x| format!("change `{x}` to"), - ), - suggestion, - Applicability::Unspecified, - ); - } - - // cannot be destructured, no need for `*` suggestion - return; - } + if is_type_diagnostic_item(cx, ty, sym::Vec) + && let Some(clone_spans) = get_spans(cx, Some(body.id()), idx, &[("clone", ".to_owned()")]) + && let TyKind::Path(QPath::Resolved(_, path)) = input.kind + && let Some(elem_ty) = path + .segments + .iter() + .find(|seg| seg.ident.name == sym::Vec) + .and_then(|ps| ps.args.as_ref()) + .map(|params| { + params + .args + .iter() + .find_map(|arg| match arg { + GenericArg::Type(ty) => Some(ty), + _ => None, + }) + .unwrap() + }) + { + let slice_ty = format!("&[{}]", snippet(cx, elem_ty.span, "_")); + diag.span_suggestion( + input.span, + "consider changing the type to", + slice_ty, + Applicability::Unspecified, + ); + + for (span, suggestion) in clone_spans { + diag.span_suggestion( + span, + snippet_opt(cx, span) + .map_or("change the call to".into(), |x| format!("change `{x}` to")), + suggestion, + Applicability::Unspecified, + ); } - if is_type_lang_item(cx, ty, LangItem::String) { - if let Some(clone_spans) = - get_spans(cx, Some(body.id()), idx, &[("clone", ".to_string()"), ("as_str", "")]) { + // cannot be destructured, no need for `*` suggestion + return; + } + + if is_type_lang_item(cx, ty, LangItem::String) { + if let Some(clone_spans) = + get_spans(cx, Some(body.id()), idx, &[("clone", ".to_string()"), ("as_str", "")]) + { + diag.span_suggestion( + input.span, + "consider changing the type to", + "&str", + Applicability::Unspecified, + ); + + for (span, suggestion) in clone_spans { diag.span_suggestion( - input.span, - "consider changing the type to", - "&str", + span, + snippet_opt(cx, span) + .map_or("change the call to".into(), |x| format!("change `{x}` to")), + suggestion, Applicability::Unspecified, ); - - for (span, suggestion) in clone_spans { - diag.span_suggestion( - span, - snippet_opt(cx, span) - .map_or( - "change the call to".into(), - |x| format!("change `{x}` to") - ), - suggestion, - Applicability::Unspecified, - ); - } - - return; } + + return; } + } - let spans = vec![(input.span, format!("&{}", snippet(cx, input.span, "_")))]; + let spans = vec![(input.span, format!("&{}", snippet(cx, input.span, "_")))]; - multispan_sugg(diag, "consider taking a reference instead", spans); - }; + multispan_sugg(diag, "consider taking a reference instead", spans); + }; - span_lint_and_then( - cx, - NEEDLESS_PASS_BY_VALUE, - input.span, - "this argument is passed by value, but not consumed in the function body", - sugg, - ); - } + span_lint_and_then( + cx, + NEEDLESS_PASS_BY_VALUE, + input.span, + "this argument is passed by value, but not consumed in the function body", + sugg, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/needless_question_mark.rs b/src/tools/clippy/clippy_lints/src/needless_question_mark.rs index 074c9fef1..a4d3aaf0d 100644 --- a/src/tools/clippy/clippy_lints/src/needless_question_mark.rs +++ b/src/tools/clippy/clippy_lints/src/needless_question_mark.rs @@ -1,12 +1,11 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::path_res; use clippy_utils::source::snippet; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::def::{DefKind, Res}; use rustc_hir::{Block, Body, CoroutineKind, CoroutineSource, Expr, ExprKind, LangItem, MatchSource, QPath}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does @@ -111,34 +110,32 @@ impl LateLintPass<'_> for NeedlessQuestionMark { } fn check(cx: &LateContext<'_>, expr: &Expr<'_>) { - if_chain! { - if let ExprKind::Call(path, [arg]) = expr.kind; - if let Res::Def(DefKind::Ctor(..), ctor_id) = path_res(cx, path); - if let Some(variant_id) = cx.tcx.opt_parent(ctor_id); - let sugg_remove = if cx.tcx.lang_items().option_some_variant() == Some(variant_id) { + if let ExprKind::Call(path, [arg]) = expr.kind + && let Res::Def(DefKind::Ctor(..), ctor_id) = path_res(cx, path) + && let Some(variant_id) = cx.tcx.opt_parent(ctor_id) + && let sugg_remove = if cx.tcx.lang_items().option_some_variant() == Some(variant_id) { "Some()" } else if cx.tcx.lang_items().result_ok_variant() == Some(variant_id) { "Ok()" } else { return; - }; - if let ExprKind::Match(inner_expr_with_q, _, MatchSource::TryDesugar(_)) = &arg.kind; - if let ExprKind::Call(called, [inner_expr]) = &inner_expr_with_q.kind; - if let ExprKind::Path(QPath::LangItem(LangItem::TryTraitBranch, ..)) = &called.kind; - if expr.span.eq_ctxt(inner_expr.span); - let expr_ty = cx.typeck_results().expr_ty(expr); - let inner_ty = cx.typeck_results().expr_ty(inner_expr); - if expr_ty == inner_ty; - then { - span_lint_and_sugg( - cx, - NEEDLESS_QUESTION_MARK, - expr.span, - "question mark operator is useless here", - &format!("try removing question mark and `{sugg_remove}`"), - format!("{}", snippet(cx, inner_expr.span, r#""...""#)), - Applicability::MachineApplicable, - ); } + && let ExprKind::Match(inner_expr_with_q, _, MatchSource::TryDesugar(_)) = &arg.kind + && let ExprKind::Call(called, [inner_expr]) = &inner_expr_with_q.kind + && let ExprKind::Path(QPath::LangItem(LangItem::TryTraitBranch, ..)) = &called.kind + && expr.span.eq_ctxt(inner_expr.span) + && let expr_ty = cx.typeck_results().expr_ty(expr) + && let inner_ty = cx.typeck_results().expr_ty(inner_expr) + && expr_ty == inner_ty + { + span_lint_and_sugg( + cx, + NEEDLESS_QUESTION_MARK, + expr.span, + "question mark operator is useless here", + &format!("try removing question mark and `{sugg_remove}`"), + format!("{}", snippet(cx, inner_expr.span, r#""...""#)), + Applicability::MachineApplicable, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/needless_update.rs b/src/tools/clippy/clippy_lints/src/needless_update.rs index f8888d368..6a2893cef 100644 --- a/src/tools/clippy/clippy_lints/src/needless_update.rs +++ b/src/tools/clippy/clippy_lints/src/needless_update.rs @@ -2,7 +2,7 @@ use clippy_utils::diagnostics::span_lint; use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/neg_cmp_op_on_partial_ord.rs b/src/tools/clippy/clippy_lints/src/neg_cmp_op_on_partial_ord.rs index 56c67406d..f7621822b 100644 --- a/src/tools/clippy/clippy_lints/src/neg_cmp_op_on_partial_ord.rs +++ b/src/tools/clippy/clippy_lints/src/neg_cmp_op_on_partial_ord.rs @@ -1,10 +1,9 @@ use clippy_utils::diagnostics::span_lint; use clippy_utils::ty::implements_trait; -use if_chain::if_chain; use rustc_hir::{BinOpKind, Expr, ExprKind, UnOp}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { @@ -46,42 +45,39 @@ declare_lint_pass!(NoNegCompOpForPartialOrd => [NEG_CMP_OP_ON_PARTIAL_ORD]); impl<'tcx> LateLintPass<'tcx> for NoNegCompOpForPartialOrd { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) { - if_chain! { - if !in_external_macro(cx.sess(), expr.span); - if let ExprKind::Unary(UnOp::Not, inner) = expr.kind; - if let ExprKind::Binary(ref op, left, _) = inner.kind; - if let BinOpKind::Le | BinOpKind::Ge | BinOpKind::Lt | BinOpKind::Gt = op.node; + if !in_external_macro(cx.sess(), expr.span) + && let ExprKind::Unary(UnOp::Not, inner) = expr.kind + && let ExprKind::Binary(ref op, left, _) = inner.kind + && let BinOpKind::Le | BinOpKind::Ge | BinOpKind::Lt | BinOpKind::Gt = op.node + { + let ty = cx.typeck_results().expr_ty(left); - then { - let ty = cx.typeck_results().expr_ty(left); - - let implements_ord = { - if let Some(id) = cx.tcx.get_diagnostic_item(sym::Ord) { - implements_trait(cx, ty, id, &[]) - } else { - return; - } - }; - - let implements_partial_ord = { - if let Some(id) = cx.tcx.lang_items().partial_ord_trait() { - implements_trait(cx, ty, id, &[ty.into()]) - } else { - return; - } - }; + let implements_ord = { + if let Some(id) = cx.tcx.get_diagnostic_item(sym::Ord) { + implements_trait(cx, ty, id, &[]) + } else { + return; + } + }; - if implements_partial_ord && !implements_ord { - span_lint( - cx, - NEG_CMP_OP_ON_PARTIAL_ORD, - expr.span, - "the use of negated comparison operators on partially ordered \ - types produces code that is hard to read and refactor, please \ - consider using the `partial_cmp` method instead, to make it \ - clear that the two values could be incomparable", - ); + let implements_partial_ord = { + if let Some(id) = cx.tcx.lang_items().partial_ord_trait() { + implements_trait(cx, ty, id, &[ty.into()]) + } else { + return; } + }; + + if implements_partial_ord && !implements_ord { + span_lint( + cx, + NEG_CMP_OP_ON_PARTIAL_ORD, + expr.span, + "the use of negated comparison operators on partially ordered \ + types produces code that is hard to read and refactor, please \ + consider using the `partial_cmp` method instead, to make it \ + clear that the two values could be incomparable", + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/neg_multiply.rs b/src/tools/clippy/clippy_lints/src/neg_multiply.rs index 8b69f94cb..f84d9fadb 100644 --- a/src/tools/clippy/clippy_lints/src/neg_multiply.rs +++ b/src/tools/clippy/clippy_lints/src/neg_multiply.rs @@ -2,12 +2,11 @@ use clippy_utils::consts::{self, Constant}; use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet_with_context; use clippy_utils::sugg::has_enclosing_paren; -use if_chain::if_chain; use rustc_ast::util::parser::PREC_PREFIX; use rustc_errors::Applicability; use rustc_hir::{BinOpKind, Expr, ExprKind, UnOp}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::Span; declare_clippy_lint! { @@ -53,28 +52,25 @@ impl<'tcx> LateLintPass<'tcx> for NegMultiply { } fn check_mul(cx: &LateContext<'_>, span: Span, lit: &Expr<'_>, exp: &Expr<'_>) { - if_chain! { - if let ExprKind::Lit(l) = lit.kind; - if consts::lit_to_mir_constant(&l.node, cx.typeck_results().expr_ty_opt(lit)) == Constant::Int(1); - if cx.typeck_results().expr_ty(exp).is_integral(); - - then { - let mut applicability = Applicability::MachineApplicable; - let (snip, from_macro) = snippet_with_context(cx, exp.span, span.ctxt(), "..", &mut applicability); - let suggestion = if !from_macro && exp.precedence().order() < PREC_PREFIX && !has_enclosing_paren(&snip) { - format!("-({snip})") - } else { - format!("-{snip}") - }; - span_lint_and_sugg( - cx, - NEG_MULTIPLY, - span, - "this multiplication by -1 can be written more succinctly", - "consider using", - suggestion, - applicability, - ); - } + if let ExprKind::Lit(l) = lit.kind + && consts::lit_to_mir_constant(&l.node, cx.typeck_results().expr_ty_opt(lit)) == Constant::Int(1) + && cx.typeck_results().expr_ty(exp).is_integral() + { + let mut applicability = Applicability::MachineApplicable; + let (snip, from_macro) = snippet_with_context(cx, exp.span, span.ctxt(), "..", &mut applicability); + let suggestion = if !from_macro && exp.precedence().order() < PREC_PREFIX && !has_enclosing_paren(&snip) { + format!("-({snip})") + } else { + format!("-{snip}") + }; + span_lint_and_sugg( + cx, + NEG_MULTIPLY, + span, + "this multiplication by -1 can be written more succinctly", + "consider using", + suggestion, + applicability, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/new_without_default.rs b/src/tools/clippy/clippy_lints/src/new_without_default.rs index f7f9dccfb..9de6ad421 100644 --- a/src/tools/clippy/clippy_lints/src/new_without_default.rs +++ b/src/tools/clippy/clippy_lints/src/new_without_default.rs @@ -2,13 +2,12 @@ use clippy_utils::diagnostics::span_lint_hir_and_then; use clippy_utils::return_ty; use clippy_utils::source::snippet; use clippy_utils::sugg::DiagnosticExt; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_hir::HirIdSet; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::sym; declare_clippy_lint! { @@ -93,73 +92,69 @@ impl<'tcx> LateLintPass<'tcx> for NewWithoutDefault { // an impl of `Default` return; } - if_chain! { - if sig.decl.inputs.is_empty(); - if name == sym::new; - if cx.effective_visibilities.is_reachable(impl_item.owner_id.def_id); - let self_def_id = cx.tcx.hir().get_parent_item(id.into()); - let self_ty = cx.tcx.type_of(self_def_id).instantiate_identity(); - if self_ty == return_ty(cx, id); - if let Some(default_trait_id) = cx.tcx.get_diagnostic_item(sym::Default); - then { - if self.impling_types.is_none() { - let mut impls = HirIdSet::default(); - cx.tcx.for_each_impl(default_trait_id, |d| { - let ty = cx.tcx.type_of(d).instantiate_identity(); - if let Some(ty_def) = ty.ty_adt_def() { - if let Some(local_def_id) = ty_def.did().as_local() { - impls.insert(cx.tcx.hir().local_def_id_to_hir_id(local_def_id)); - } + if sig.decl.inputs.is_empty() + && name == sym::new + && cx.effective_visibilities.is_reachable(impl_item.owner_id.def_id) + && let self_def_id = cx.tcx.hir().get_parent_item(id.into()) + && let self_ty = cx.tcx.type_of(self_def_id).instantiate_identity() + && self_ty == return_ty(cx, id) + && let Some(default_trait_id) = cx.tcx.get_diagnostic_item(sym::Default) + { + if self.impling_types.is_none() { + let mut impls = HirIdSet::default(); + cx.tcx.for_each_impl(default_trait_id, |d| { + let ty = cx.tcx.type_of(d).instantiate_identity(); + if let Some(ty_def) = ty.ty_adt_def() { + if let Some(local_def_id) = ty_def.did().as_local() { + impls.insert(cx.tcx.local_def_id_to_hir_id(local_def_id)); } - }); - self.impling_types = Some(impls); - } - - // Check if a Default implementation exists for the Self type, regardless of - // generics - if_chain! { - if let Some(ref impling_types) = self.impling_types; - let self_def = cx.tcx.type_of(self_def_id).instantiate_identity(); - if let Some(self_def) = self_def.ty_adt_def(); - if let Some(self_local_did) = self_def.did().as_local(); - let self_id = cx.tcx.hir().local_def_id_to_hir_id(self_local_did); - if impling_types.contains(&self_id); - then { - return; } - } + }); + self.impling_types = Some(impls); + } - let generics_sugg = snippet(cx, generics.span, ""); - let where_clause_sugg = if generics.has_where_clause_predicates { - format!("\n{}\n", snippet(cx, generics.where_clause_span, "")) - } else { - String::new() - }; - let self_ty_fmt = self_ty.to_string(); - let self_type_snip = snippet(cx, impl_self_ty.span, &self_ty_fmt); - span_lint_hir_and_then( - cx, - NEW_WITHOUT_DEFAULT, - id.into(), - impl_item.span, - &format!( - "you should consider adding a `Default` implementation for `{self_type_snip}`" - ), - |diag| { - diag.suggest_prepend_item( - cx, - item.span, - "try adding this", - &create_new_without_default_suggest_msg( - &self_type_snip, - &generics_sugg, - &where_clause_sugg - ), - Applicability::MachineApplicable, - ); - }, - ); + // Check if a Default implementation exists for the Self type, regardless of + // generics + if let Some(ref impling_types) = self.impling_types + && let self_def = cx.tcx.type_of(self_def_id).instantiate_identity() + && let Some(self_def) = self_def.ty_adt_def() + && let Some(self_local_did) = self_def.did().as_local() + && let self_id = cx.tcx.local_def_id_to_hir_id(self_local_did) + && impling_types.contains(&self_id) + { + return; } + + let generics_sugg = snippet(cx, generics.span, ""); + let where_clause_sugg = if generics.has_where_clause_predicates { + format!("\n{}\n", snippet(cx, generics.where_clause_span, "")) + } else { + String::new() + }; + let self_ty_fmt = self_ty.to_string(); + let self_type_snip = snippet(cx, impl_self_ty.span, &self_ty_fmt); + span_lint_hir_and_then( + cx, + NEW_WITHOUT_DEFAULT, + id.into(), + impl_item.span, + &format!( + "you should consider adding a `Default` implementation for `{self_type_snip}`" + ), + |diag| { + diag.suggest_prepend_item( + cx, + item.span, + "try adding this", + &create_new_without_default_suggest_msg( + &self_type_snip, + &generics_sugg, + &where_clause_sugg, + ), + Applicability::MachineApplicable, + ); + }, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/no_effect.rs b/src/tools/clippy/clippy_lints/src/no_effect.rs index 3a28e511f..5978da831 100644 --- a/src/tools/clippy/clippy_lints/src/no_effect.rs +++ b/src/tools/clippy/clippy_lints/src/no_effect.rs @@ -10,7 +10,7 @@ use rustc_hir::{ use rustc_infer::infer::TyCtxtInferExt as _; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use std::ops::Deref; declare_clippy_lint! { @@ -87,6 +87,17 @@ impl<'tcx> LateLintPass<'tcx> for NoEffect { fn check_no_effect(cx: &LateContext<'_>, stmt: &Stmt<'_>) -> bool { if let StmtKind::Semi(expr) = stmt.kind { + // move `expr.span.from_expansion()` ahead + if expr.span.from_expansion() { + return false; + } + let expr = peel_blocks(expr); + + if is_operator_overridden(cx, expr) { + // Return `true`, to prevent `check_unnecessary_operation` from + // linting on this statement as well. + return true; + } if has_no_effect(cx, expr) { span_lint_hir_and_then( cx, @@ -132,34 +143,47 @@ fn check_no_effect(cx: &LateContext<'_>, stmt: &Stmt<'_>) -> bool { return true; } } else if let StmtKind::Local(local) = stmt.kind { - if_chain! { - if !is_lint_allowed(cx, NO_EFFECT_UNDERSCORE_BINDING, local.hir_id); - if let Some(init) = local.init; - if local.els.is_none(); - if !local.pat.span.from_expansion(); - if has_no_effect(cx, init); - if let PatKind::Binding(_, _, ident, _) = local.pat.kind; - if ident.name.to_ident_string().starts_with('_'); - then { - span_lint_hir( - cx, - NO_EFFECT_UNDERSCORE_BINDING, - init.hir_id, - stmt.span, - "binding to `_` prefixed variable with no side-effect" - ); - return true; - } + if !is_lint_allowed(cx, NO_EFFECT_UNDERSCORE_BINDING, local.hir_id) + && let Some(init) = local.init + && local.els.is_none() + && !local.pat.span.from_expansion() + && has_no_effect(cx, init) + && let PatKind::Binding(_, _, ident, _) = local.pat.kind + && ident.name.to_ident_string().starts_with('_') + { + span_lint_hir( + cx, + NO_EFFECT_UNDERSCORE_BINDING, + init.hir_id, + stmt.span, + "binding to `_` prefixed variable with no side-effect", + ); + return true; } } false } -fn has_no_effect(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool { - if expr.span.from_expansion() { - return false; +fn is_operator_overridden(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool { + // It's very hard or impossable to check whether overridden operator have side-effect this lint. + // So, this function assume user-defined operator is overridden with an side-effect. + // The definition of user-defined structure here is ADT-type, + // Althrough this will weaken the ability of this lint, less error lint-fix happen. + match expr.kind { + ExprKind::Binary(..) | ExprKind::Unary(..) => { + // No need to check type of `lhs` and `rhs` + // because if the operator is overridden, at least one operand is ADT type + + // reference: rust/compiler/rustc_middle/src/ty/typeck_results.rs: `is_method_call`. + // use this function to check whether operator is overridden in `ExprKind::{Binary, Unary}`. + cx.typeck_results().is_method_call(expr) + }, + _ => false, } - match peel_blocks(expr).kind { +} + +fn has_no_effect(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool { + match expr.kind { ExprKind::Lit(..) | ExprKind::Closure { .. } => true, ExprKind::Path(..) => !has_drop(cx, cx.typeck_results().expr_ty(expr)), ExprKind::Index(a, b, _) | ExprKind::Binary(_, a, b) => has_no_effect(cx, a) && has_no_effect(cx, b), @@ -199,63 +223,60 @@ fn has_no_effect(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool { } fn check_unnecessary_operation(cx: &LateContext<'_>, stmt: &Stmt<'_>) { - if_chain! { - if let StmtKind::Semi(expr) = stmt.kind; - let ctxt = stmt.span.ctxt(); - if expr.span.ctxt() == ctxt; - if let Some(reduced) = reduce_expression(cx, expr); - if !in_external_macro(cx.sess(), stmt.span); - if reduced.iter().all(|e| e.span.ctxt() == ctxt); - then { - if let ExprKind::Index(..) = &expr.kind { - let snippet = if let (Some(arr), Some(func)) = - (snippet_opt(cx, reduced[0].span), snippet_opt(cx, reduced[1].span)) - { + if let StmtKind::Semi(expr) = stmt.kind + && let ctxt = stmt.span.ctxt() + && expr.span.ctxt() == ctxt + && let Some(reduced) = reduce_expression(cx, expr) + && !in_external_macro(cx.sess(), stmt.span) + && reduced.iter().all(|e| e.span.ctxt() == ctxt) + { + if let ExprKind::Index(..) = &expr.kind { + let snippet = + if let (Some(arr), Some(func)) = (snippet_opt(cx, reduced[0].span), snippet_opt(cx, reduced[1].span)) { format!("assert!({}.len() > {});", &arr, &func) } else { return; }; - span_lint_hir_and_then( - cx, - UNNECESSARY_OPERATION, - expr.hir_id, - stmt.span, - "unnecessary operation", - |diag| { - diag.span_suggestion( - stmt.span, - "statement can be written as", - snippet, - Applicability::MaybeIncorrect, - ); - }, - ); - } else { - let mut snippet = String::new(); - for e in reduced { - if let Some(snip) = snippet_opt(cx, e.span) { - snippet.push_str(&snip); - snippet.push(';'); - } else { - return; - } + span_lint_hir_and_then( + cx, + UNNECESSARY_OPERATION, + expr.hir_id, + stmt.span, + "unnecessary operation", + |diag| { + diag.span_suggestion( + stmt.span, + "statement can be written as", + snippet, + Applicability::MaybeIncorrect, + ); + }, + ); + } else { + let mut snippet = String::new(); + for e in reduced { + if let Some(snip) = snippet_opt(cx, e.span) { + snippet.push_str(&snip); + snippet.push(';'); + } else { + return; } - span_lint_hir_and_then( - cx, - UNNECESSARY_OPERATION, - expr.hir_id, - stmt.span, - "unnecessary operation", - |diag| { - diag.span_suggestion( - stmt.span, - "statement can be reduced to", - snippet, - Applicability::MachineApplicable, - ); - }, - ); } + span_lint_hir_and_then( + cx, + UNNECESSARY_OPERATION, + expr.hir_id, + stmt.span, + "unnecessary operation", + |diag| { + diag.span_suggestion( + stmt.span, + "statement can be reduced to", + snippet, + Applicability::MachineApplicable, + ); + }, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/no_mangle_with_rust_abi.rs b/src/tools/clippy/clippy_lints/src/no_mangle_with_rust_abi.rs index 04d750148..8d5a523fd 100644 --- a/src/tools/clippy/clippy_lints/src/no_mangle_with_rust_abi.rs +++ b/src/tools/clippy/clippy_lints/src/no_mangle_with_rust_abi.rs @@ -3,7 +3,7 @@ use clippy_utils::source::snippet_with_applicability; use rustc_errors::Applicability; use rustc_hir::{Item, ItemKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::{BytePos, Pos}; use rustc_target::spec::abi::Abi; diff --git a/src/tools/clippy/clippy_lints/src/non_canonical_impls.rs b/src/tools/clippy/clippy_lints/src/non_canonical_impls.rs index 9689f63a0..63050080a 100644 --- a/src/tools/clippy/clippy_lints/src/non_canonical_impls.rs +++ b/src/tools/clippy/clippy_lints/src/non_canonical_impls.rs @@ -6,7 +6,7 @@ use rustc_hir::def_id::LocalDefId; use rustc_hir::{Expr, ExprKind, ImplItem, ImplItemKind, LangItem, Node, UnOp}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::EarlyBinder; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; use rustc_span::symbol::kw; diff --git a/src/tools/clippy/clippy_lints/src/non_copy_const.rs b/src/tools/clippy/clippy_lints/src/non_copy_const.rs index 54cec066b..4013cb345 100644 --- a/src/tools/clippy/clippy_lints/src/non_copy_const.rs +++ b/src/tools/clippy/clippy_lints/src/non_copy_const.rs @@ -7,7 +7,6 @@ use std::ptr; use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::macros::macro_backtrace; use clippy_utils::{def_path_def_ids, in_constant}; -use if_chain::if_chain; use rustc_data_structures::fx::FxHashSet; use rustc_hir::def::{DefKind, Res}; use rustc_hir::def_id::DefId; @@ -19,7 +18,7 @@ use rustc_middle::mir::interpret::{ErrorHandled, EvalToValTreeResult, GlobalId}; use rustc_middle::query::Key; use rustc_middle::ty::adjustment::Adjust; use rustc_middle::ty::{self, Ty, TyCtxt}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::{sym, InnerSpan, Span}; use rustc_target::abi::VariantIdx; @@ -386,15 +385,14 @@ impl<'tcx> LateLintPass<'tcx> for NonCopyConst { of_trait: Some(of_trait_ref), .. }) => { - if_chain! { + if let Some(of_trait_def_id) = of_trait_ref.trait_def_id() // Lint a trait impl item only when the definition is a generic type, // assuming an assoc const is not meant to be an interior mutable type. - if let Some(of_trait_def_id) = of_trait_ref.trait_def_id(); - if let Some(of_assoc_item) = cx + && let Some(of_assoc_item) = cx .tcx .associated_item(impl_item.owner_id) - .trait_item_def_id; - if cx + .trait_item_def_id + && cx .tcx .layout_of(cx.tcx.param_env(of_trait_def_id).and( // Normalize assoc types because ones originated from generic params @@ -405,23 +403,17 @@ impl<'tcx> LateLintPass<'tcx> for NonCopyConst { cx.tcx.type_of(of_assoc_item).instantiate_identity(), ), )) - .is_err(); + .is_err() // If there were a function like `has_frozen_variant` described above, // we should use here as a frozen variant is a potential to be frozen // similar to unknown layouts. // e.g. `layout_of(...).is_err() || has_frozen_variant(...);` - let ty = cx.tcx.type_of(impl_item.owner_id).instantiate_identity(); - let normalized = cx.tcx.normalize_erasing_regions(cx.param_env, ty); - if !self.is_ty_ignored(ty) && Self::is_unfrozen(cx, normalized); - if self.is_value_unfrozen_poly(cx, *body_id, normalized); - then { - lint( - cx, - Source::Assoc { - item: impl_item.span, - }, - ); - } + && let ty = cx.tcx.type_of(impl_item.owner_id).instantiate_identity() + && let normalized = cx.tcx.normalize_erasing_regions(cx.param_env, ty) + && !self.is_ty_ignored(ty) && Self::is_unfrozen(cx, normalized) + && self.is_value_unfrozen_poly(cx, *body_id, normalized) + { + lint(cx, Source::Assoc { item: impl_item.span }); } }, ItemKind::Impl(Impl { of_trait: None, .. }) => { @@ -462,7 +454,7 @@ impl<'tcx> LateLintPass<'tcx> for NonCopyConst { if parent_id == cur_expr.hir_id { break; } - if let Some(Node::Expr(parent_expr)) = cx.tcx.hir().find(parent_id) { + if let Some(Node::Expr(parent_expr)) = cx.tcx.opt_hir_node(parent_id) { match &parent_expr.kind { ExprKind::AddrOf(..) => { // `&e` => `e` must be referenced. diff --git a/src/tools/clippy/clippy_lints/src/non_expressive_names.rs b/src/tools/clippy/clippy_lints/src/non_expressive_names.rs index 61622034d..ba9230dab 100644 --- a/src/tools/clippy/clippy_lints/src/non_expressive_names.rs +++ b/src/tools/clippy/clippy_lints/src/non_expressive_names.rs @@ -5,9 +5,9 @@ use rustc_ast::ast::{ use rustc_ast::visit::{walk_block, walk_expr, walk_pat, Visitor}; use rustc_lint::{EarlyContext, EarlyLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_tool_lint, impl_lint_pass}; -use rustc_span::{sym, Span}; +use rustc_session::impl_lint_pass; use rustc_span::symbol::{Ident, Symbol}; +use rustc_span::{sym, Span}; use std::cmp::Ordering; declare_clippy_lint! { @@ -341,7 +341,9 @@ impl<'a, 'tcx> Visitor<'tcx> for SimilarNamesLocalVisitor<'a, 'tcx> { self.apply(|this| { SimilarNamesNameVisitor(this).visit_pat(&arm.pat); - this.apply(|this| walk_expr(this, &arm.body)); + if let Some(body) = &arm.body { + this.apply(|this| walk_expr(this, body)); + } }); self.check_single_char_names(); diff --git a/src/tools/clippy/clippy_lints/src/non_octal_unix_permissions.rs b/src/tools/clippy/clippy_lints/src/non_octal_unix_permissions.rs index e94e45899..49e9e2c00 100644 --- a/src/tools/clippy/clippy_lints/src/non_octal_unix_permissions.rs +++ b/src/tools/clippy/clippy_lints/src/non_octal_unix_permissions.rs @@ -1,11 +1,10 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::{snippet_opt, snippet_with_applicability}; use clippy_utils::{match_def_path, paths}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { @@ -44,38 +43,36 @@ impl<'tcx> LateLintPass<'tcx> for NonOctalUnixPermissions { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) { match &expr.kind { ExprKind::MethodCall(path, func, [param], _) => { - if_chain! { - if let Some(adt) = cx.typeck_results().expr_ty(func).peel_refs().ty_adt_def(); - if (path.ident.name == sym!(mode) - && matches!(cx.tcx.get_diagnostic_name(adt.did()), Some(sym::FsOpenOptions | sym::DirBuilder))) + if let Some(adt) = cx.typeck_results().expr_ty(func).peel_refs().ty_adt_def() + && ((path.ident.name == sym!(mode) + && matches!( + cx.tcx.get_diagnostic_name(adt.did()), + Some(sym::FsOpenOptions | sym::DirBuilder) + )) || (path.ident.name == sym!(set_mode) - && cx.tcx.is_diagnostic_item(sym::FsPermissions, adt.did())); - if let ExprKind::Lit(_) = param.kind; - if param.span.eq_ctxt(expr.span); + && cx.tcx.is_diagnostic_item(sym::FsPermissions, adt.did()))) + && let ExprKind::Lit(_) = param.kind + && param.span.eq_ctxt(expr.span) + { + let Some(snip) = snippet_opt(cx, param.span) else { + return; + }; - then { - let Some(snip) = snippet_opt(cx, param.span) else { - return - }; - - if !snip.starts_with("0o") { - show_error(cx, param); - } + if !snip.starts_with("0o") { + show_error(cx, param); } } }, ExprKind::Call(func, [param]) => { - if_chain! { - if let ExprKind::Path(ref path) = func.kind; - if let Some(def_id) = cx.qpath_res(path, func.hir_id).opt_def_id(); - if match_def_path(cx, def_id, &paths::PERMISSIONS_FROM_MODE); - if let ExprKind::Lit(_) = param.kind; - if param.span.eq_ctxt(expr.span); - if let Some(snip) = snippet_opt(cx, param.span); - if !snip.starts_with("0o"); - then { - show_error(cx, param); - } + if let ExprKind::Path(ref path) = func.kind + && let Some(def_id) = cx.qpath_res(path, func.hir_id).opt_def_id() + && match_def_path(cx, def_id, &paths::PERMISSIONS_FROM_MODE) + && let ExprKind::Lit(_) = param.kind + && param.span.eq_ctxt(expr.span) + && let Some(snip) = snippet_opt(cx, param.span) + && !snip.starts_with("0o") + { + show_error(cx, param); } }, _ => {}, diff --git a/src/tools/clippy/clippy_lints/src/non_send_fields_in_send_ty.rs b/src/tools/clippy/clippy_lints/src/non_send_fields_in_send_ty.rs index 62ef48c8a..793a3a954 100644 --- a/src/tools/clippy/clippy_lints/src/non_send_fields_in_send_ty.rs +++ b/src/tools/clippy/clippy_lints/src/non_send_fields_in_send_ty.rs @@ -8,7 +8,7 @@ use rustc_hir::{FieldDef, Item, ItemKind, Node}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::lint::in_external_macro; use rustc_middle::ty::{self, GenericArgKind, Ty}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::sym; declare_clippy_lint! { @@ -81,73 +81,73 @@ impl<'tcx> LateLintPass<'tcx> for NonSendFieldInSendTy { // We start from `Send` impl instead of `check_field_def()` because // single `AdtDef` may have multiple `Send` impls due to generic // parameters, and the lint is much easier to implement in this way. - if_chain! { - if !in_external_macro(cx.tcx.sess, item.span); - if let Some(send_trait) = cx.tcx.get_diagnostic_item(sym::Send); - if let ItemKind::Impl(hir_impl) = &item.kind; - if let Some(trait_ref) = &hir_impl.of_trait; - if let Some(trait_id) = trait_ref.trait_def_id(); - if send_trait == trait_id; - if hir_impl.polarity == ImplPolarity::Positive; - if let Some(ty_trait_ref) = cx.tcx.impl_trait_ref(item.owner_id); - if let self_ty = ty_trait_ref.instantiate_identity().self_ty(); - if let ty::Adt(adt_def, impl_trait_args) = self_ty.kind(); - then { - let mut non_send_fields = Vec::new(); - - let hir_map = cx.tcx.hir(); - for variant in adt_def.variants() { - for field in &variant.fields { - if_chain! { - if let Some(field_hir_id) = field - .did - .as_local() - .map(|local_def_id| hir_map.local_def_id_to_hir_id(local_def_id)); - if !is_lint_allowed(cx, NON_SEND_FIELDS_IN_SEND_TY, field_hir_id); - if let field_ty = field.ty(cx.tcx, impl_trait_args); - if !ty_allowed_in_send(cx, field_ty, send_trait); - if let Node::Field(field_def) = hir_map.get(field_hir_id); - then { - non_send_fields.push(NonSendField { - def: field_def, - ty: field_ty, - generic_params: collect_generic_params(field_ty), - }) - } - } + if !in_external_macro(cx.tcx.sess, item.span) + && let Some(send_trait) = cx.tcx.get_diagnostic_item(sym::Send) + && let ItemKind::Impl(hir_impl) = &item.kind + && let Some(trait_ref) = &hir_impl.of_trait + && let Some(trait_id) = trait_ref.trait_def_id() + && send_trait == trait_id + && hir_impl.polarity == ImplPolarity::Positive + && let Some(ty_trait_ref) = cx.tcx.impl_trait_ref(item.owner_id) + && let self_ty = ty_trait_ref.instantiate_identity().self_ty() + && let ty::Adt(adt_def, impl_trait_args) = self_ty.kind() + { + let mut non_send_fields = Vec::new(); + + for variant in adt_def.variants() { + for field in &variant.fields { + if let Some(field_hir_id) = field + .did + .as_local() + .map(|local_def_id| cx.tcx.local_def_id_to_hir_id(local_def_id)) + && !is_lint_allowed(cx, NON_SEND_FIELDS_IN_SEND_TY, field_hir_id) + && let field_ty = field.ty(cx.tcx, impl_trait_args) + && !ty_allowed_in_send(cx, field_ty, send_trait) + && let Node::Field(field_def) = cx.tcx.hir_node(field_hir_id) + { + non_send_fields.push(NonSendField { + def: field_def, + ty: field_ty, + generic_params: collect_generic_params(field_ty), + }); } } + } - if !non_send_fields.is_empty() { - span_lint_and_then( - cx, - NON_SEND_FIELDS_IN_SEND_TY, - item.span, - &format!( - "some fields in `{}` are not safe to be sent to another thread", - snippet(cx, hir_impl.self_ty.span, "Unknown") - ), - |diag| { - for field in non_send_fields { - diag.span_note( - field.def.span, - format!("it is not safe to send field `{}` to another thread", field.def.ident.name), - ); - - match field.generic_params.len() { - 0 => diag.help("use a thread-safe type that implements `Send`"), - 1 if is_ty_param(field.ty) => diag.help(format!("add `{}: Send` bound in `Send` impl", field.ty)), - _ => diag.help(format!( - "add bounds on type parameter{} `{}` that satisfy `{}: Send`", - if field.generic_params.len() > 1 { "s" } else { "" }, - field.generic_params_string(), - snippet(cx, field.def.ty.span, "Unknown"), - )), - }; - } - }, - ); - } + if !non_send_fields.is_empty() { + span_lint_and_then( + cx, + NON_SEND_FIELDS_IN_SEND_TY, + item.span, + &format!( + "some fields in `{}` are not safe to be sent to another thread", + snippet(cx, hir_impl.self_ty.span, "Unknown") + ), + |diag| { + for field in non_send_fields { + diag.span_note( + field.def.span, + format!( + "it is not safe to send field `{}` to another thread", + field.def.ident.name + ), + ); + + match field.generic_params.len() { + 0 => diag.help("use a thread-safe type that implements `Send`"), + 1 if is_ty_param(field.ty) => { + diag.help(format!("add `{}: Send` bound in `Send` impl", field.ty)) + }, + _ => diag.help(format!( + "add bounds on type parameter{} `{}` that satisfy `{}: Send`", + if field.generic_params.len() > 1 { "s" } else { "" }, + field.generic_params_string(), + snippet(cx, field.def.ty.span, "Unknown"), + )), + }; + } + }, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/nonstandard_macro_braces.rs b/src/tools/clippy/clippy_lints/src/nonstandard_macro_braces.rs index 11c3a5417..1c6069e9c 100644 --- a/src/tools/clippy/clippy_lints/src/nonstandard_macro_braces.rs +++ b/src/tools/clippy/clippy_lints/src/nonstandard_macro_braces.rs @@ -1,13 +1,12 @@ use clippy_config::types::MacroMatcher; use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet_opt; -use if_chain::if_chain; use rustc_ast::ast; use rustc_data_structures::fx::{FxHashMap, FxHashSet}; use rustc_errors::Applicability; use rustc_hir::def_id::DefId; use rustc_lint::{EarlyContext, EarlyLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::hygiene::{ExpnKind, MacroKind}; use rustc_span::Span; @@ -34,17 +33,17 @@ declare_clippy_lint! { } /// The (callsite span, (open brace, close brace), source snippet) -type MacroInfo<'a> = (Span, &'a (String, String), String); +type MacroInfo = (Span, (char, char), String); -#[derive(Clone, Debug, Default)] +#[derive(Debug)] pub struct MacroBraces { - macro_braces: FxHashMap<String, (String, String)>, + macro_braces: FxHashMap<String, (char, char)>, done: FxHashSet<Span>, } impl MacroBraces { - pub fn new(conf: &FxHashSet<MacroMatcher>) -> Self { - let macro_braces = macro_braces(conf.clone()); + pub fn new(conf: &[MacroMatcher]) -> Self { + let macro_braces = macro_braces(conf); Self { macro_braces, done: FxHashSet::default(), @@ -84,7 +83,7 @@ impl EarlyLintPass for MacroBraces { } } -fn is_offending_macro<'a>(cx: &EarlyContext<'_>, span: Span, mac_braces: &'a MacroBraces) -> Option<MacroInfo<'a>> { +fn is_offending_macro(cx: &EarlyContext<'_>, span: Span, mac_braces: &MacroBraces) -> Option<MacroInfo> { let unnested_or_local = || { !span.ctxt().outer_expn_data().call_site.from_expansion() || span @@ -93,28 +92,26 @@ fn is_offending_macro<'a>(cx: &EarlyContext<'_>, span: Span, mac_braces: &'a Mac .map_or(false, |e| e.macro_def_id.map_or(false, DefId::is_local)) }; let span_call_site = span.ctxt().outer_expn_data().call_site; - if_chain! { - if let ExpnKind::Macro(MacroKind::Bang, mac_name) = span.ctxt().outer_expn_data().kind; - let name = mac_name.as_str(); - if let Some(braces) = mac_braces.macro_braces.get(name); - if let Some(snip) = snippet_opt(cx, span_call_site); + if let ExpnKind::Macro(MacroKind::Bang, mac_name) = span.ctxt().outer_expn_data().kind + && let name = mac_name.as_str() + && let Some(&braces) = mac_braces.macro_braces.get(name) + && let Some(snip) = snippet_opt(cx, span_call_site) // we must check only invocation sites // https://github.com/rust-lang/rust-clippy/issues/7422 - if snip.starts_with(&format!("{name}!")); - if unnested_or_local(); + && snip.starts_with(&format!("{name}!")) + && unnested_or_local() // make formatting consistent - let c = snip.replace(' ', ""); - if !c.starts_with(&format!("{name}!{}", braces.0)); - if !mac_braces.done.contains(&span_call_site); - then { - Some((span_call_site, braces, snip)) - } else { - None - } + && let c = snip.replace(' ', "") + && !c.starts_with(&format!("{name}!{}", braces.0)) + && !mac_braces.done.contains(&span_call_site) + { + Some((span_call_site, braces, snip)) + } else { + None } } -fn emit_help(cx: &EarlyContext<'_>, snip: &str, braces: &(String, String), span: Span) { +fn emit_help(cx: &EarlyContext<'_>, snip: &str, (open, close): (char, char), span: Span) { if let Some((macro_name, macro_args_str)) = snip.split_once('!') { let mut macro_args = macro_args_str.trim().to_string(); // now remove the wrong braces @@ -126,67 +123,31 @@ fn emit_help(cx: &EarlyContext<'_>, snip: &str, braces: &(String, String), span: span, &format!("use of irregular braces for `{macro_name}!` macro"), "consider writing", - format!("{macro_name}!{}{macro_args}{}", braces.0, braces.1), + format!("{macro_name}!{open}{macro_args}{close}"), Applicability::MachineApplicable, ); } } -fn macro_braces(conf: FxHashSet<MacroMatcher>) -> FxHashMap<String, (String, String)> { - let mut braces = vec![ - macro_matcher!( - name: "print", - braces: ("(", ")"), - ), - macro_matcher!( - name: "println", - braces: ("(", ")"), - ), - macro_matcher!( - name: "eprint", - braces: ("(", ")"), - ), - macro_matcher!( - name: "eprintln", - braces: ("(", ")"), - ), - macro_matcher!( - name: "write", - braces: ("(", ")"), - ), - macro_matcher!( - name: "writeln", - braces: ("(", ")"), - ), - macro_matcher!( - name: "format", - braces: ("(", ")"), - ), - macro_matcher!( - name: "format_args", - braces: ("(", ")"), - ), - macro_matcher!( - name: "vec", - braces: ("[", "]"), - ), - macro_matcher!( - name: "matches", - braces: ("(", ")"), - ), - ] - .into_iter() - .collect::<FxHashMap<_, _>>(); +fn macro_braces(conf: &[MacroMatcher]) -> FxHashMap<String, (char, char)> { + let mut braces = FxHashMap::from_iter( + [ + ("print", ('(', ')')), + ("println", ('(', ')')), + ("eprint", ('(', ')')), + ("eprintln", ('(', ')')), + ("write", ('(', ')')), + ("writeln", ('(', ')')), + ("format", ('(', ')')), + ("format_args", ('(', ')')), + ("vec", ('[', ']')), + ("matches", ('(', ')')), + ] + .map(|(k, v)| (k.to_string(), v)), + ); // We want users items to override any existing items for it in conf { - braces.insert(it.name, it.braces); + braces.insert(it.name.clone(), it.braces); } braces } - -macro_rules! macro_matcher { - (name: $name:expr, braces: ($open:expr, $close:expr) $(,)?) => { - ($name.to_owned(), ($open.to_owned(), $close.to_owned())) - }; -} -pub(crate) use macro_matcher; diff --git a/src/tools/clippy/clippy_lints/src/octal_escapes.rs b/src/tools/clippy/clippy_lints/src/octal_escapes.rs index 0faf4ce3d..8822dfeed 100644 --- a/src/tools/clippy/clippy_lints/src/octal_escapes.rs +++ b/src/tools/clippy/clippy_lints/src/octal_escapes.rs @@ -4,7 +4,7 @@ use rustc_ast::token::{Lit, LitKind}; use rustc_errors::Applicability; use rustc_lint::{EarlyContext, EarlyLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::Span; use std::fmt::Write; diff --git a/src/tools/clippy/clippy_lints/src/only_used_in_recursion.rs b/src/tools/clippy/clippy_lints/src/only_used_in_recursion.rs index ef7b36764..d621051ef 100644 --- a/src/tools/clippy/clippy_lints/src/only_used_in_recursion.rs +++ b/src/tools/clippy/clippy_lints/src/only_used_in_recursion.rs @@ -8,7 +8,7 @@ use rustc_hir::hir_id::HirIdMap; use rustc_hir::{Body, Expr, ExprKind, HirId, ImplItem, ImplItemKind, Node, PatKind, TraitItem, TraitItemKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::{self, ConstKind, EarlyBinder, GenericArgKind, GenericArgsRef}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::symbol::{kw, Ident}; use rustc_span::Span; use std::iter; diff --git a/src/tools/clippy/clippy_lints/src/operators/arithmetic_side_effects.rs b/src/tools/clippy/clippy_lints/src/operators/arithmetic_side_effects.rs index 4c6462b77..c081dec9b 100644 --- a/src/tools/clippy/clippy_lints/src/operators/arithmetic_side_effects.rs +++ b/src/tools/clippy/clippy_lints/src/operators/arithmetic_side_effects.rs @@ -7,9 +7,9 @@ use rustc_data_structures::fx::{FxHashMap, FxHashSet}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::Ty; use rustc_session::impl_lint_pass; -use rustc_span::{Span, Symbol}; use rustc_span::source_map::Spanned; use rustc_span::symbol::sym; +use rustc_span::{Span, Symbol}; use {rustc_ast as ast, rustc_hir as hir}; const HARD_CODED_ALLOWED_BINARY: &[[&str; 2]] = &[["f32", "f32"], ["f64", "f64"], ["std::string::String", "str"]]; diff --git a/src/tools/clippy/clippy_lints/src/operators/assign_op_pattern.rs b/src/tools/clippy/clippy_lints/src/operators/assign_op_pattern.rs index c4572a09d..2f85130fb 100644 --- a/src/tools/clippy/clippy_lints/src/operators/assign_op_pattern.rs +++ b/src/tools/clippy/clippy_lints/src/operators/assign_op_pattern.rs @@ -4,7 +4,6 @@ use clippy_utils::ty::implements_trait; use clippy_utils::visitors::for_each_expr; use clippy_utils::{binop_traits, eq_expr_value, trait_ref_of_method}; use core::ops::ControlFlow; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_hir_typeck::expr_use_visitor::{Delegate, ExprUseVisitor, PlaceBase, PlaceWithHirId}; @@ -25,43 +24,40 @@ pub(super) fn check<'tcx>( let lint = |assignee: &hir::Expr<'_>, rhs: &hir::Expr<'_>| { let ty = cx.typeck_results().expr_ty(assignee); let rty = cx.typeck_results().expr_ty(rhs); - if_chain! { - if let Some((_, lang_item)) = binop_traits(op.node); - if let Some(trait_id) = cx.tcx.lang_items().get(lang_item); - let parent_fn = cx.tcx.hir().get_parent_item(e.hir_id).def_id; - if trait_ref_of_method(cx, parent_fn) - .map_or(true, |t| t.path.res.def_id() != trait_id); - if implements_trait(cx, ty, trait_id, &[rty.into()]); - then { - // Primitive types execute assign-ops right-to-left. Every other type is left-to-right. - if !(ty.is_primitive() && rty.is_primitive()) { - // TODO: This will have false negatives as it doesn't check if the borrows are - // actually live at the end of their respective expressions. - let mut_borrows = mut_borrows_in_expr(cx, assignee); - let imm_borrows = imm_borrows_in_expr(cx, rhs); - if mut_borrows.iter().any(|id| imm_borrows.contains(id)) { - return; - } + if let Some((_, lang_item)) = binop_traits(op.node) + && let Some(trait_id) = cx.tcx.lang_items().get(lang_item) + && let parent_fn = cx.tcx.hir().get_parent_item(e.hir_id).def_id + && trait_ref_of_method(cx, parent_fn).map_or(true, |t| t.path.res.def_id() != trait_id) + && implements_trait(cx, ty, trait_id, &[rty.into()]) + { + // Primitive types execute assign-ops right-to-left. Every other type is left-to-right. + if !(ty.is_primitive() && rty.is_primitive()) { + // TODO: This will have false negatives as it doesn't check if the borrows are + // actually live at the end of their respective expressions. + let mut_borrows = mut_borrows_in_expr(cx, assignee); + let imm_borrows = imm_borrows_in_expr(cx, rhs); + if mut_borrows.iter().any(|id| imm_borrows.contains(id)) { + return; } - span_lint_and_then( - cx, - ASSIGN_OP_PATTERN, - expr.span, - "manual implementation of an assign operation", - |diag| { - if let (Some(snip_a), Some(snip_r)) = - (snippet_opt(cx, assignee.span), snippet_opt(cx, rhs.span)) - { - diag.span_suggestion( - expr.span, - "replace it with", - format!("{snip_a} {}= {snip_r}", op.node.as_str()), - Applicability::MachineApplicable, - ); - } - }, - ); } + span_lint_and_then( + cx, + ASSIGN_OP_PATTERN, + expr.span, + "manual implementation of an assign operation", + |diag| { + if let (Some(snip_a), Some(snip_r)) = + (snippet_opt(cx, assignee.span), snippet_opt(cx, rhs.span)) + { + diag.span_suggestion( + expr.span, + "replace it with", + format!("{snip_a} {}= {snip_r}", op.node.as_str()), + Applicability::MachineApplicable, + ); + } + }, + ); } }; diff --git a/src/tools/clippy/clippy_lints/src/operators/const_comparisons.rs b/src/tools/clippy/clippy_lints/src/operators/const_comparisons.rs index ec2bb8699..e278cf983 100644 --- a/src/tools/clippy/clippy_lints/src/operators/const_comparisons.rs +++ b/src/tools/clippy/clippy_lints/src/operators/const_comparisons.rs @@ -3,13 +3,12 @@ use std::cmp::Ordering; use clippy_utils::consts::{constant, Constant}; -use if_chain::if_chain; use rustc_hir::{BinOpKind, Expr, ExprKind}; use rustc_lint::LateContext; use rustc_middle::ty::layout::HasTyCtxt; use rustc_middle::ty::{Ty, TypeckResults}; -use rustc_span::Span; use rustc_span::source_map::Spanned; +use rustc_span::Span; use clippy_utils::diagnostics::span_lint_and_note; use clippy_utils::source::snippet; @@ -24,19 +23,17 @@ fn comparison_to_const<'tcx>( typeck: &TypeckResults<'tcx>, expr: &'tcx Expr<'tcx>, ) -> Option<(CmpOp, &'tcx Expr<'tcx>, &'tcx Expr<'tcx>, Constant<'tcx>, Ty<'tcx>)> { - if_chain! { - if let ExprKind::Binary(operator, left, right) = expr.kind; - if let Ok(cmp_op) = CmpOp::try_from(operator.node); - then { - match (constant(cx, typeck, left), constant(cx, typeck, right)) { - (Some(_), Some(_)) => None, - (_, Some(con)) => Some((cmp_op, left, right, con, typeck.expr_ty(right))), - (Some(con), _) => Some((cmp_op.reverse(), right, left, con, typeck.expr_ty(left))), - _ => None, - } - } else { - None + if let ExprKind::Binary(operator, left, right) = expr.kind + && let Ok(cmp_op) = CmpOp::try_from(operator.node) + { + match (constant(cx, typeck, left), constant(cx, typeck, right)) { + (Some(_), Some(_)) => None, + (_, Some(con)) => Some((cmp_op, left, right, con, typeck.expr_ty(right))), + (Some(con), _) => Some((cmp_op.reverse(), right, left, con, typeck.expr_ty(left))), + _ => None, } + } else { + None } } @@ -47,87 +44,89 @@ pub(super) fn check<'tcx>( right_cond: &'tcx Expr<'tcx>, span: Span, ) { - if_chain! { + if and_op.node == BinOpKind::And // Ensure that the binary operator is && - if and_op.node == BinOpKind::And; // Check that both operands to '&&' are themselves a binary operation // The `comparison_to_const` step also checks this, so this step is just an optimization - if let ExprKind::Binary(_, _, _) = left_cond.kind; - if let ExprKind::Binary(_, _, _) = right_cond.kind; + && let ExprKind::Binary(_, _, _) = left_cond.kind + && let ExprKind::Binary(_, _, _) = right_cond.kind - let typeck = cx.typeck_results(); + && let typeck = cx.typeck_results() // Check that both operands to '&&' compare a non-literal to a literal - if let Some((left_cmp_op, left_expr, left_const_expr, left_const, left_type)) = - comparison_to_const(cx, typeck, left_cond); - if let Some((right_cmp_op, right_expr, right_const_expr, right_const, right_type)) = - comparison_to_const(cx, typeck, right_cond); + && let Some((left_cmp_op, left_expr, left_const_expr, left_const, left_type)) = + comparison_to_const(cx, typeck, left_cond) + && let Some((right_cmp_op, right_expr, right_const_expr, right_const, right_type)) = + comparison_to_const(cx, typeck, right_cond) - if left_type == right_type; + && left_type == right_type // Check that the same expression is compared in both comparisons - if SpanlessEq::new(cx).eq_expr(left_expr, right_expr); + && SpanlessEq::new(cx).eq_expr(left_expr, right_expr) - if !left_expr.can_have_side_effects(); + && !left_expr.can_have_side_effects() // Compare the two constant expressions - if let Some(ordering) = Constant::partial_cmp(cx.tcx(), left_type, &left_const, &right_const); + && let Some(ordering) = Constant::partial_cmp(cx.tcx(), left_type, &left_const, &right_const) // Rule out the `x >= 42 && x <= 42` corner case immediately // Mostly to simplify the implementation, but it is also covered by `clippy::double_comparisons` - if !matches!( + && !matches!( (&left_cmp_op, &right_cmp_op, ordering), (CmpOp::Le | CmpOp::Ge, CmpOp::Le | CmpOp::Ge, Ordering::Equal) - ); - - then { - if left_cmp_op.direction() == right_cmp_op.direction() { - let lhs_str = snippet(cx, left_cond.span, "<lhs>"); - let rhs_str = snippet(cx, right_cond.span, "<rhs>"); - // We already know that either side of `&&` has no effect, - // but emit a different error message depending on which side it is - if left_side_is_useless(left_cmp_op, ordering) { - span_lint_and_note( - cx, - REDUNDANT_COMPARISONS, - span, - "left-hand side of `&&` operator has no effect", - Some(left_cond.span.until(right_cond.span)), - &format!("`if `{rhs_str}` evaluates to true, {lhs_str}` will always evaluate to true as well"), - ); - } else { - span_lint_and_note( - cx, - REDUNDANT_COMPARISONS, - span, - "right-hand side of `&&` operator has no effect", - Some(and_op.span.to(right_cond.span)), - &format!("`if `{lhs_str}` evaluates to true, {rhs_str}` will always evaluate to true as well"), - ); - } - // We could autofix this error but choose not to, - // because code triggering this lint probably not behaving correctly in the first place - } - else if !comparison_is_possible(left_cmp_op.direction(), ordering) { - let expr_str = snippet(cx, left_expr.span, ".."); - let lhs_str = snippet(cx, left_const_expr.span, "<lhs>"); - let rhs_str = snippet(cx, right_const_expr.span, "<rhs>"); - let note = match ordering { - Ordering::Less => format!("since `{lhs_str}` < `{rhs_str}`, the expression evaluates to false for any value of `{expr_str}`"), - Ordering::Equal => format!("`{expr_str}` cannot simultaneously be greater than and less than `{lhs_str}`"), - Ordering::Greater => format!("since `{lhs_str}` > `{rhs_str}`, the expression evaluates to false for any value of `{expr_str}`"), - }; + ) + { + if left_cmp_op.direction() == right_cmp_op.direction() { + let lhs_str = snippet(cx, left_cond.span, "<lhs>"); + let rhs_str = snippet(cx, right_cond.span, "<rhs>"); + // We already know that either side of `&&` has no effect, + // but emit a different error message depending on which side it is + if left_side_is_useless(left_cmp_op, ordering) { span_lint_and_note( cx, - IMPOSSIBLE_COMPARISONS, + REDUNDANT_COMPARISONS, span, - "boolean expression will never evaluate to 'true'", - None, - ¬e, + "left-hand side of `&&` operator has no effect", + Some(left_cond.span.until(right_cond.span)), + &format!("`if `{rhs_str}` evaluates to true, {lhs_str}` will always evaluate to true as well"), ); + } else { + span_lint_and_note( + cx, + REDUNDANT_COMPARISONS, + span, + "right-hand side of `&&` operator has no effect", + Some(and_op.span.to(right_cond.span)), + &format!("`if `{lhs_str}` evaluates to true, {rhs_str}` will always evaluate to true as well"), + ); + } + // We could autofix this error but choose not to, + // because code triggering this lint probably not behaving correctly in the first place + } else if !comparison_is_possible(left_cmp_op.direction(), ordering) { + let expr_str = snippet(cx, left_expr.span, ".."); + let lhs_str = snippet(cx, left_const_expr.span, "<lhs>"); + let rhs_str = snippet(cx, right_const_expr.span, "<rhs>"); + let note = match ordering { + Ordering::Less => format!( + "since `{lhs_str}` < `{rhs_str}`, the expression evaluates to false for any value of `{expr_str}`" + ), + Ordering::Equal => { + format!("`{expr_str}` cannot simultaneously be greater than and less than `{lhs_str}`") + }, + Ordering::Greater => format!( + "since `{lhs_str}` > `{rhs_str}`, the expression evaluates to false for any value of `{expr_str}`" + ), }; - } + span_lint_and_note( + cx, + IMPOSSIBLE_COMPARISONS, + span, + "boolean expression will never evaluate to 'true'", + None, + ¬e, + ); + }; } } diff --git a/src/tools/clippy/clippy_lints/src/operators/eq_op.rs b/src/tools/clippy/clippy_lints/src/operators/eq_op.rs index fd3502ad8..01dd418c3 100644 --- a/src/tools/clippy/clippy_lints/src/operators/eq_op.rs +++ b/src/tools/clippy/clippy_lints/src/operators/eq_op.rs @@ -36,7 +36,7 @@ pub(crate) fn check<'tcx>( left: &'tcx Expr<'_>, right: &'tcx Expr<'_>, ) { - if is_useless_with_eq_exprs(op.into()) && eq_expr_value(cx, left, right) && !is_in_test_function(cx.tcx, e.hir_id) { + if is_useless_with_eq_exprs(op) && eq_expr_value(cx, left, right) && !is_in_test_function(cx.tcx, e.hir_id) { span_lint_and_then( cx, EQ_OP, diff --git a/src/tools/clippy/clippy_lints/src/operators/float_cmp.rs b/src/tools/clippy/clippy_lints/src/operators/float_cmp.rs index bce6bdcaf..0561739d1 100644 --- a/src/tools/clippy/clippy_lints/src/operators/float_cmp.rs +++ b/src/tools/clippy/clippy_lints/src/operators/float_cmp.rs @@ -2,7 +2,6 @@ use clippy_utils::consts::{constant_with_source, Constant}; use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::get_item_name; use clippy_utils::sugg::Sugg; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{BinOpKind, Expr, ExprKind, UnOp}; use rustc_lint::LateContext; @@ -105,14 +104,12 @@ fn is_signum(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool { return is_signum(cx, child_expr); } - if_chain! { - if let ExprKind::MethodCall(method_name, self_arg, ..) = expr.kind; - if sym!(signum) == method_name.ident.name; - // Check that the receiver of the signum() is a float (expressions[0] is the receiver of - // the method call) - then { - return is_float(cx, self_arg); - } + if let ExprKind::MethodCall(method_name, self_arg, ..) = expr.kind + && sym!(signum) == method_name.ident.name + // Check that the receiver of the signum() is a float (expressions[0] is the receiver of + // the method call) + { + return is_float(cx, self_arg); } false } diff --git a/src/tools/clippy/clippy_lints/src/operators/float_equality_without_abs.rs b/src/tools/clippy/clippy_lints/src/operators/float_equality_without_abs.rs index a0a8b6aab..cace85a24 100644 --- a/src/tools/clippy/clippy_lints/src/operators/float_equality_without_abs.rs +++ b/src/tools/clippy/clippy_lints/src/operators/float_equality_without_abs.rs @@ -1,6 +1,5 @@ use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::{match_def_path, paths, sugg}; -use if_chain::if_chain; use rustc_ast::util::parser::AssocOp; use rustc_errors::Applicability; use rustc_hir::def::{DefKind, Res}; @@ -24,48 +23,43 @@ pub(crate) fn check<'tcx>( _ => return, }; - if_chain! { + if let ExprKind::Binary( // left hand side is a subtraction - if let ExprKind::Binary( Spanned { node: BinOpKind::Sub, .. }, val_l, val_r, - ) = lhs.kind; + ) = lhs.kind // right hand side matches either f32::EPSILON or f64::EPSILON - if let ExprKind::Path(ref epsilon_path) = rhs.kind; - if let Res::Def(DefKind::AssocConst, def_id) = cx.qpath_res(epsilon_path, rhs.hir_id); - if match_def_path(cx, def_id, &paths::F32_EPSILON) || match_def_path(cx, def_id, &paths::F64_EPSILON); + && let ExprKind::Path(ref epsilon_path) = rhs.kind + && let Res::Def(DefKind::AssocConst, def_id) = cx.qpath_res(epsilon_path, rhs.hir_id) + && (match_def_path(cx, def_id, &paths::F32_EPSILON) || match_def_path(cx, def_id, &paths::F64_EPSILON)) // values of the subtractions on the left hand side are of the type float - let t_val_l = cx.typeck_results().expr_ty(val_l); - let t_val_r = cx.typeck_results().expr_ty(val_r); - if let ty::Float(_) = t_val_l.kind(); - if let ty::Float(_) = t_val_r.kind(); - - then { - let sug_l = sugg::Sugg::hir(cx, val_l, ".."); - let sug_r = sugg::Sugg::hir(cx, val_r, ".."); - // format the suggestion - let suggestion = format!("{}.abs()", sugg::make_assoc(AssocOp::Subtract, &sug_l, &sug_r).maybe_par()); - // spans the lint - span_lint_and_then( - cx, - FLOAT_EQUALITY_WITHOUT_ABS, - expr.span, - "float equality check without `.abs()`", - | diag | { - diag.span_suggestion( - lhs.span, - "add `.abs()`", - suggestion, - Applicability::MaybeIncorrect, - ); - } - ); - } + && let t_val_l = cx.typeck_results().expr_ty(val_l) + && let t_val_r = cx.typeck_results().expr_ty(val_r) + && let ty::Float(_) = t_val_l.kind() + && let ty::Float(_) = t_val_r.kind() + { + let sug_l = sugg::Sugg::hir(cx, val_l, ".."); + let sug_r = sugg::Sugg::hir(cx, val_r, ".."); + // format the suggestion + let suggestion = format!( + "{}.abs()", + sugg::make_assoc(AssocOp::Subtract, &sug_l, &sug_r).maybe_par() + ); + // spans the lint + span_lint_and_then( + cx, + FLOAT_EQUALITY_WITHOUT_ABS, + expr.span, + "float equality check without `.abs()`", + |diag| { + diag.span_suggestion(lhs.span, "add `.abs()`", suggestion, Applicability::MaybeIncorrect); + }, + ); } } diff --git a/src/tools/clippy/clippy_lints/src/operators/misrefactored_assign_op.rs b/src/tools/clippy/clippy_lints/src/operators/misrefactored_assign_op.rs index 5eabb349e..fecc5a857 100644 --- a/src/tools/clippy/clippy_lints/src/operators/misrefactored_assign_op.rs +++ b/src/tools/clippy/clippy_lints/src/operators/misrefactored_assign_op.rs @@ -46,7 +46,7 @@ fn lint_misrefactored_assign_op( if let (Some(snip_a), Some(snip_r)) = (snippet_opt(cx, assignee.span), snippet_opt(cx, rhs_other.span)) { let a = &sugg::Sugg::hir(cx, assignee, ".."); let r = &sugg::Sugg::hir(cx, rhs, ".."); - let long = format!("{snip_a} = {}", sugg::make_binop(op.into(), a, r)); + let long = format!("{snip_a} = {}", sugg::make_binop(op, a, r)); diag.span_suggestion( expr.span, format!( diff --git a/src/tools/clippy/clippy_lints/src/operators/mod.rs b/src/tools/clippy/clippy_lints/src/operators/mod.rs index ee79ea276..4c09c4eea 100644 --- a/src/tools/clippy/clippy_lints/src/operators/mod.rs +++ b/src/tools/clippy/clippy_lints/src/operators/mod.rs @@ -25,7 +25,7 @@ pub(crate) mod arithmetic_side_effects; use rustc_hir::{Body, Expr, ExprKind, UnOp}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/operators/modulo_arithmetic.rs b/src/tools/clippy/clippy_lints/src/operators/modulo_arithmetic.rs index a2c3a4d8b..cb3916484 100644 --- a/src/tools/clippy/clippy_lints/src/operators/modulo_arithmetic.rs +++ b/src/tools/clippy/clippy_lints/src/operators/modulo_arithmetic.rs @@ -1,7 +1,6 @@ use clippy_utils::consts::{constant, Constant}; use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::sext; -use if_chain::if_chain; use rustc_hir::{BinOpKind, Expr}; use rustc_lint::LateContext; use rustc_middle::ty::{self, Ty}; @@ -19,15 +18,12 @@ pub(super) fn check<'tcx>( if op == BinOpKind::Rem { let lhs_operand = analyze_operand(lhs, cx, e); let rhs_operand = analyze_operand(rhs, cx, e); - if_chain! { - if let Some(lhs_operand) = lhs_operand; - if let Some(rhs_operand) = rhs_operand; - then { - check_const_operands(cx, e, &lhs_operand, &rhs_operand); - } - else { - check_non_const_operands(cx, e, lhs); - } + if let Some(lhs_operand) = lhs_operand + && let Some(rhs_operand) = rhs_operand + { + check_const_operands(cx, e, &lhs_operand, &rhs_operand); + } else { + check_non_const_operands(cx, e, lhs); } }; } diff --git a/src/tools/clippy/clippy_lints/src/operators/op_ref.rs b/src/tools/clippy/clippy_lints/src/operators/op_ref.rs index 932dd470f..7d8aa3f56 100644 --- a/src/tools/clippy/clippy_lints/src/operators/op_ref.rs +++ b/src/tools/clippy/clippy_lints/src/operators/op_ref.rs @@ -2,7 +2,6 @@ use clippy_utils::diagnostics::{multispan_sugg, span_lint_and_then}; use clippy_utils::get_enclosing_block; use clippy_utils::source::snippet; use clippy_utils::ty::{implements_trait, is_copy}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::def::Res; use rustc_hir::def_id::DefId; @@ -180,41 +179,33 @@ fn in_impl<'tcx>( e: &'tcx Expr<'_>, bin_op: DefId, ) -> Option<(&'tcx rustc_hir::Ty<'tcx>, &'tcx rustc_hir::Ty<'tcx>)> { - if_chain! { - if let Some(block) = get_enclosing_block(cx, e.hir_id); - if let Some(impl_def_id) = cx.tcx.impl_of_method(block.hir_id.owner.to_def_id()); - let item = cx.tcx.hir().expect_item(impl_def_id.expect_local()); - if let ItemKind::Impl(item) = &item.kind; - if let Some(of_trait) = &item.of_trait; - if let Some(seg) = of_trait.path.segments.last(); - if let Res::Def(_, trait_id) = seg.res; - if trait_id == bin_op; - if let Some(generic_args) = seg.args; - if let Some(GenericArg::Type(other_ty)) = generic_args.args.last(); - - then { - Some((item.self_ty, other_ty)) - } - else { - None - } + if let Some(block) = get_enclosing_block(cx, e.hir_id) + && let Some(impl_def_id) = cx.tcx.impl_of_method(block.hir_id.owner.to_def_id()) + && let item = cx.tcx.hir().expect_item(impl_def_id.expect_local()) + && let ItemKind::Impl(item) = &item.kind + && let Some(of_trait) = &item.of_trait + && let Some(seg) = of_trait.path.segments.last() + && let Res::Def(_, trait_id) = seg.res + && trait_id == bin_op + && let Some(generic_args) = seg.args + && let Some(GenericArg::Type(other_ty)) = generic_args.args.last() + { + Some((item.self_ty, other_ty)) + } else { + None } } fn are_equal(cx: &LateContext<'_>, middle_ty: Ty<'_>, hir_ty: &rustc_hir::Ty<'_>) -> bool { - if_chain! { - if let ty::Adt(adt_def, _) = middle_ty.kind(); - if let Some(local_did) = adt_def.did().as_local(); - let item = cx.tcx.hir().expect_item(local_did); - let middle_ty_id = item.owner_id.to_def_id(); - if let TyKind::Path(QPath::Resolved(_, path)) = hir_ty.kind; - if let Res::Def(_, hir_ty_id) = path.res; - - then { - hir_ty_id == middle_ty_id - } - else { - false - } + if let ty::Adt(adt_def, _) = middle_ty.kind() + && let Some(local_did) = adt_def.did().as_local() + && let item = cx.tcx.hir().expect_item(local_did) + && let middle_ty_id = item.owner_id.to_def_id() + && let TyKind::Path(QPath::Resolved(_, path)) = hir_ty.kind + && let Res::Def(_, hir_ty_id) = path.res + { + hir_ty_id == middle_ty_id + } else { + false } } diff --git a/src/tools/clippy/clippy_lints/src/operators/ptr_eq.rs b/src/tools/clippy/clippy_lints/src/operators/ptr_eq.rs index 1229c202f..9db2e2463 100644 --- a/src/tools/clippy/clippy_lints/src/operators/ptr_eq.rs +++ b/src/tools/clippy/clippy_lints/src/operators/ptr_eq.rs @@ -1,6 +1,5 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet_opt; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{BinOpKind, Expr, ExprKind}; use rustc_lint::LateContext; @@ -22,22 +21,20 @@ pub(super) fn check<'tcx>( _ => (left, right), }; - if_chain! { - if let Some(left_var) = expr_as_cast_to_raw_pointer(cx, left); - if let Some(right_var) = expr_as_cast_to_raw_pointer(cx, right); - if let Some(left_snip) = snippet_opt(cx, left_var.span); - if let Some(right_snip) = snippet_opt(cx, right_var.span); - then { - span_lint_and_sugg( - cx, - PTR_EQ, - expr.span, - LINT_MSG, - "try", - format!("std::ptr::eq({left_snip}, {right_snip})"), - Applicability::MachineApplicable, - ); - } + if let Some(left_var) = expr_as_cast_to_raw_pointer(cx, left) + && let Some(right_var) = expr_as_cast_to_raw_pointer(cx, right) + && let Some(left_snip) = snippet_opt(cx, left_var.span) + && let Some(right_snip) = snippet_opt(cx, right_var.span) + { + span_lint_and_sugg( + cx, + PTR_EQ, + expr.span, + LINT_MSG, + "try", + format!("std::ptr::eq({left_snip}, {right_snip})"), + Applicability::MachineApplicable, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/option_env_unwrap.rs b/src/tools/clippy/clippy_lints/src/option_env_unwrap.rs index 7792efe6a..4bfb26209 100644 --- a/src/tools/clippy/clippy_lints/src/option_env_unwrap.rs +++ b/src/tools/clippy/clippy_lints/src/option_env_unwrap.rs @@ -2,7 +2,7 @@ use clippy_utils::diagnostics::span_lint_and_help; use clippy_utils::is_direct_expn_of; use rustc_ast::ast::{Expr, ExprKind, MethodCall}; use rustc_lint::{EarlyContext, EarlyLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::{sym, Span}; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/option_if_let_else.rs b/src/tools/clippy/clippy_lints/src/option_if_let_else.rs index d7cbbe13a..89e4e3c74 100644 --- a/src/tools/clippy/clippy_lints/src/option_if_let_else.rs +++ b/src/tools/clippy/clippy_lints/src/option_if_let_else.rs @@ -4,13 +4,12 @@ use clippy_utils::{ can_move_expr_to_closure, eager_or_lazy, higher, in_constant, is_else_clause, is_res_lang_ctor, peel_blocks, peel_hir_expr_while, CaptureKind, }; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::def::Res; use rustc_hir::LangItem::{OptionNone, OptionSome, ResultErr, ResultOk}; use rustc_hir::{Arm, BindingAnnotation, Expr, ExprKind, MatchSource, Mutability, Pat, PatKind, Path, QPath, UnOp}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::SyntaxContext; declare_clippy_lint! { @@ -122,73 +121,97 @@ fn try_get_option_occurrence<'tcx>( _ => expr, }; let (inner_pat, is_result) = try_get_inner_pat_and_is_result(cx, pat)?; - if_chain! { - if let PatKind::Binding(bind_annotation, _, id, None) = inner_pat.kind; - if let Some(some_captures) = can_move_expr_to_closure(cx, if_then); - if let Some(none_captures) = can_move_expr_to_closure(cx, if_else); - if some_captures + if let PatKind::Binding(bind_annotation, _, id, None) = inner_pat.kind + && let Some(some_captures) = can_move_expr_to_closure(cx, if_then) + && let Some(none_captures) = can_move_expr_to_closure(cx, if_else) + && some_captures .iter() .filter_map(|(id, &c)| none_captures.get(id).map(|&c2| (c, c2))) - .all(|(x, y)| x.is_imm_ref() && y.is_imm_ref()); - then { - let capture_mut = if bind_annotation == BindingAnnotation::MUT { "mut " } else { "" }; - let some_body = peel_blocks(if_then); - let none_body = peel_blocks(if_else); - let method_sugg = if eager_or_lazy::switch_to_eager_eval(cx, none_body) { "map_or" } else { "map_or_else" }; - let capture_name = id.name.to_ident_string(); - let (as_ref, as_mut) = match &expr.kind { - ExprKind::AddrOf(_, Mutability::Not, _) => (true, false), - ExprKind::AddrOf(_, Mutability::Mut, _) => (false, true), - _ if let Some(mutb) = cx.typeck_results().expr_ty(expr).ref_mutability() => { - (mutb == Mutability::Not, mutb == Mutability::Mut) - } - _ => (bind_annotation == BindingAnnotation::REF, bind_annotation == BindingAnnotation::REF_MUT), - }; + .all(|(x, y)| x.is_imm_ref() && y.is_imm_ref()) + { + let capture_mut = if bind_annotation == BindingAnnotation::MUT { + "mut " + } else { + "" + }; + let some_body = peel_blocks(if_then); + let none_body = peel_blocks(if_else); + let method_sugg = if eager_or_lazy::switch_to_eager_eval(cx, none_body) { + "map_or" + } else { + "map_or_else" + }; + let capture_name = id.name.to_ident_string(); + let (as_ref, as_mut) = match &expr.kind { + ExprKind::AddrOf(_, Mutability::Not, _) => (true, false), + ExprKind::AddrOf(_, Mutability::Mut, _) => (false, true), + _ if let Some(mutb) = cx.typeck_results().expr_ty(expr).ref_mutability() => { + (mutb == Mutability::Not, mutb == Mutability::Mut) + }, + _ => ( + bind_annotation == BindingAnnotation::REF, + bind_annotation == BindingAnnotation::REF_MUT, + ), + }; - // Check if captures the closure will need conflict with borrows made in the scrutinee. - // TODO: check all the references made in the scrutinee expression. This will require interacting - // with the borrow checker. Currently only `<local>[.<field>]*` is checked for. - if as_ref || as_mut { - let e = peel_hir_expr_while(cond_expr, |e| match e.kind { - ExprKind::Field(e, _) | ExprKind::AddrOf(_, _, e) => Some(e), - _ => None, - }); - if let ExprKind::Path(QPath::Resolved(None, Path { res: Res::Local(local_id), .. })) = e.kind { - match some_captures.get(local_id) - .or_else(|| (method_sugg == "map_or_else").then_some(()).and_then(|()| none_captures.get(local_id))) - { - Some(CaptureKind::Value | CaptureKind::Ref(Mutability::Mut)) => return None, - Some(CaptureKind::Ref(Mutability::Not)) if as_mut => return None, - Some(CaptureKind::Ref(Mutability::Not)) | None => (), - } + // Check if captures the closure will need conflict with borrows made in the scrutinee. + // TODO: check all the references made in the scrutinee expression. This will require interacting + // with the borrow checker. Currently only `<local>[.<field>]*` is checked for. + if as_ref || as_mut { + let e = peel_hir_expr_while(cond_expr, |e| match e.kind { + ExprKind::Field(e, _) | ExprKind::AddrOf(_, _, e) => Some(e), + _ => None, + }); + if let ExprKind::Path(QPath::Resolved( + None, + Path { + res: Res::Local(local_id), + .. + }, + )) = e.kind + { + match some_captures.get(local_id).or_else(|| { + (method_sugg == "map_or_else") + .then_some(()) + .and_then(|()| none_captures.get(local_id)) + }) { + Some(CaptureKind::Value | CaptureKind::Ref(Mutability::Mut)) => return None, + Some(CaptureKind::Ref(Mutability::Not)) if as_mut => return None, + Some(CaptureKind::Ref(Mutability::Not)) | None => (), } } + } - let mut app = Applicability::Unspecified; + let mut app = Applicability::Unspecified; - let (none_body, is_argless_call) = match none_body.kind { - ExprKind::Call(call_expr, []) if !none_body.span.from_expansion() => (call_expr, true), - _ => (none_body, false), - }; + let (none_body, is_argless_call) = match none_body.kind { + ExprKind::Call(call_expr, []) if !none_body.span.from_expansion() => (call_expr, true), + _ => (none_body, false), + }; - return Some(OptionOccurrence { - option: format_option_in_sugg( - Sugg::hir_with_context(cx, cond_expr, ctxt, "..", &mut app), - as_ref, - as_mut, - ), - method_sugg: method_sugg.to_string(), - some_expr: format!( - "|{capture_mut}{capture_name}| {}", - Sugg::hir_with_context(cx, some_body, ctxt, "..", &mut app), - ), - none_expr: format!( - "{}{}", - if method_sugg == "map_or" || is_argless_call { "" } else if is_result { "|_| " } else { "|| "}, - Sugg::hir_with_context(cx, none_body, ctxt, "..", &mut app), - ), - }); - } + return Some(OptionOccurrence { + option: format_option_in_sugg( + Sugg::hir_with_context(cx, cond_expr, ctxt, "..", &mut app), + as_ref, + as_mut, + ), + method_sugg: method_sugg.to_string(), + some_expr: format!( + "|{capture_mut}{capture_name}| {}", + Sugg::hir_with_context(cx, some_body, ctxt, "..", &mut app), + ), + none_expr: format!( + "{}{}", + if method_sugg == "map_or" || is_argless_call { + "" + } else if is_result { + "|_| " + } else { + "|| " + }, + Sugg::hir_with_context(cx, none_body, ctxt, "..", &mut app), + ), + }); } None @@ -216,21 +239,24 @@ fn detect_option_if_let_else<'tcx>(cx: &LateContext<'tcx>, expr: &Expr<'tcx>) -> if_then, if_else: Some(if_else), }) = higher::IfLet::hir(cx, expr) + && !cx.typeck_results().expr_ty(expr).is_unit() + && !is_else_clause(cx.tcx, expr) { - if !is_else_clause(cx.tcx, expr) { - return try_get_option_occurrence(cx, expr.span.ctxt(), let_pat, let_expr, if_then, if_else); - } + try_get_option_occurrence(cx, expr.span.ctxt(), let_pat, let_expr, if_then, if_else) + } else { + None } - None } fn detect_option_match<'tcx>(cx: &LateContext<'tcx>, expr: &Expr<'tcx>) -> Option<OptionOccurrence> { - if let ExprKind::Match(ex, arms, MatchSource::Normal) = expr.kind { - if let Some((let_pat, if_then, if_else)) = try_convert_match(cx, arms) { - return try_get_option_occurrence(cx, expr.span.ctxt(), let_pat, ex, if_then, if_else); - } + if let ExprKind::Match(ex, arms, MatchSource::Normal) = expr.kind + && !cx.typeck_results().expr_ty(expr).is_unit() + && let Some((let_pat, if_then, if_else)) = try_convert_match(cx, arms) + { + try_get_option_occurrence(cx, expr.span.ctxt(), let_pat, ex, if_then, if_else) + } else { + None } - None } fn try_convert_match<'tcx>( diff --git a/src/tools/clippy/clippy_lints/src/overflow_check_conditional.rs b/src/tools/clippy/clippy_lints/src/overflow_check_conditional.rs index 38cd5043a..de7898793 100644 --- a/src/tools/clippy/clippy_lints/src/overflow_check_conditional.rs +++ b/src/tools/clippy/clippy_lints/src/overflow_check_conditional.rs @@ -1,9 +1,8 @@ use clippy_utils::diagnostics::span_lint; use clippy_utils::SpanlessEq; -use if_chain::if_chain; use rustc_hir::{BinOpKind, Expr, ExprKind, QPath}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does @@ -34,41 +33,37 @@ impl<'tcx> LateLintPass<'tcx> for OverflowCheckConditional { // a + b < a, a > a + b, a < a - b, a - b > a fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) { let eq = |l, r| SpanlessEq::new(cx).eq_path_segment(l, r); - if_chain! { - if let ExprKind::Binary(ref op, first, second) = expr.kind; - if let ExprKind::Binary(ref op2, ident1, ident2) = first.kind; - if let ExprKind::Path(QPath::Resolved(_, path1)) = ident1.kind; - if let ExprKind::Path(QPath::Resolved(_, path2)) = ident2.kind; - if let ExprKind::Path(QPath::Resolved(_, path3)) = second.kind; - if eq(&path1.segments[0], &path3.segments[0]) || eq(&path2.segments[0], &path3.segments[0]); - if cx.typeck_results().expr_ty(ident1).is_integral(); - if cx.typeck_results().expr_ty(ident2).is_integral(); - then { - if op.node == BinOpKind::Lt && op2.node == BinOpKind::Add { - span_lint(cx, OVERFLOW_CHECK_CONDITIONAL, expr.span, OVERFLOW_MSG); - } - if op.node == BinOpKind::Gt && op2.node == BinOpKind::Sub { - span_lint(cx, OVERFLOW_CHECK_CONDITIONAL, expr.span, UNDERFLOW_MSG); - } + if let ExprKind::Binary(ref op, first, second) = expr.kind + && let ExprKind::Binary(ref op2, ident1, ident2) = first.kind + && let ExprKind::Path(QPath::Resolved(_, path1)) = ident1.kind + && let ExprKind::Path(QPath::Resolved(_, path2)) = ident2.kind + && let ExprKind::Path(QPath::Resolved(_, path3)) = second.kind + && (eq(&path1.segments[0], &path3.segments[0]) || eq(&path2.segments[0], &path3.segments[0])) + && cx.typeck_results().expr_ty(ident1).is_integral() + && cx.typeck_results().expr_ty(ident2).is_integral() + { + if op.node == BinOpKind::Lt && op2.node == BinOpKind::Add { + span_lint(cx, OVERFLOW_CHECK_CONDITIONAL, expr.span, OVERFLOW_MSG); + } + if op.node == BinOpKind::Gt && op2.node == BinOpKind::Sub { + span_lint(cx, OVERFLOW_CHECK_CONDITIONAL, expr.span, UNDERFLOW_MSG); } } - if_chain! { - if let ExprKind::Binary(ref op, first, second) = expr.kind; - if let ExprKind::Binary(ref op2, ident1, ident2) = second.kind; - if let ExprKind::Path(QPath::Resolved(_, path1)) = ident1.kind; - if let ExprKind::Path(QPath::Resolved(_, path2)) = ident2.kind; - if let ExprKind::Path(QPath::Resolved(_, path3)) = first.kind; - if eq(&path1.segments[0], &path3.segments[0]) || eq(&path2.segments[0], &path3.segments[0]); - if cx.typeck_results().expr_ty(ident1).is_integral(); - if cx.typeck_results().expr_ty(ident2).is_integral(); - then { - if op.node == BinOpKind::Gt && op2.node == BinOpKind::Add { - span_lint(cx, OVERFLOW_CHECK_CONDITIONAL, expr.span, OVERFLOW_MSG); - } - if op.node == BinOpKind::Lt && op2.node == BinOpKind::Sub { - span_lint(cx, OVERFLOW_CHECK_CONDITIONAL, expr.span, UNDERFLOW_MSG); - } + if let ExprKind::Binary(ref op, first, second) = expr.kind + && let ExprKind::Binary(ref op2, ident1, ident2) = second.kind + && let ExprKind::Path(QPath::Resolved(_, path1)) = ident1.kind + && let ExprKind::Path(QPath::Resolved(_, path2)) = ident2.kind + && let ExprKind::Path(QPath::Resolved(_, path3)) = first.kind + && (eq(&path1.segments[0], &path3.segments[0]) || eq(&path2.segments[0], &path3.segments[0])) + && cx.typeck_results().expr_ty(ident1).is_integral() + && cx.typeck_results().expr_ty(ident2).is_integral() + { + if op.node == BinOpKind::Gt && op2.node == BinOpKind::Add { + span_lint(cx, OVERFLOW_CHECK_CONDITIONAL, expr.span, OVERFLOW_MSG); + } + if op.node == BinOpKind::Lt && op2.node == BinOpKind::Sub { + span_lint(cx, OVERFLOW_CHECK_CONDITIONAL, expr.span, UNDERFLOW_MSG); } } } diff --git a/src/tools/clippy/clippy_lints/src/panic_in_result_fn.rs b/src/tools/clippy/clippy_lints/src/panic_in_result_fn.rs index 6a760f9fe..f821a4efe 100644 --- a/src/tools/clippy/clippy_lints/src/panic_in_result_fn.rs +++ b/src/tools/clippy/clippy_lints/src/panic_in_result_fn.rs @@ -7,7 +7,7 @@ use core::ops::ControlFlow; use rustc_hir as hir; use rustc_hir::intravisit::FnKind; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::def_id::LocalDefId; use rustc_span::{sym, Span}; @@ -55,7 +55,7 @@ impl<'tcx> LateLintPass<'tcx> for PanicInResultFn { if matches!(fn_kind, FnKind::Closure) { return; } - let owner = cx.tcx.hir().local_def_id_to_hir_id(def_id).expect_owner(); + let owner = cx.tcx.local_def_id_to_hir_id(def_id).expect_owner(); if is_type_diagnostic_item(cx, return_ty(cx, owner), sym::Result) { lint_impl_body(cx, span, body); } diff --git a/src/tools/clippy/clippy_lints/src/panic_unimplemented.rs b/src/tools/clippy/clippy_lints/src/panic_unimplemented.rs index f4f1f6ddb..ef51a9a9a 100644 --- a/src/tools/clippy/clippy_lints/src/panic_unimplemented.rs +++ b/src/tools/clippy/clippy_lints/src/panic_unimplemented.rs @@ -2,7 +2,7 @@ use clippy_utils::diagnostics::span_lint; use clippy_utils::macros::{is_panic, root_macro_call_first_node}; use rustc_hir::Expr; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/partial_pub_fields.rs b/src/tools/clippy/clippy_lints/src/partial_pub_fields.rs index 99ba55b6b..ffa403e27 100644 --- a/src/tools/clippy/clippy_lints/src/partial_pub_fields.rs +++ b/src/tools/clippy/clippy_lints/src/partial_pub_fields.rs @@ -1,7 +1,7 @@ use clippy_utils::diagnostics::span_lint_and_help; use rustc_ast::ast::{Item, ItemKind}; use rustc_lint::{EarlyContext, EarlyLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/partialeq_ne_impl.rs b/src/tools/clippy/clippy_lints/src/partialeq_ne_impl.rs index 68d3d00ac..18e6aad9c 100644 --- a/src/tools/clippy/clippy_lints/src/partialeq_ne_impl.rs +++ b/src/tools/clippy/clippy_lints/src/partialeq_ne_impl.rs @@ -1,8 +1,7 @@ use clippy_utils::diagnostics::span_lint_hir; -use if_chain::if_chain; use rustc_hir::{Impl, Item, ItemKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { @@ -34,22 +33,24 @@ declare_lint_pass!(PartialEqNeImpl => [PARTIALEQ_NE_IMPL]); impl<'tcx> LateLintPass<'tcx> for PartialEqNeImpl { fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx Item<'_>) { - if_chain! { - if let ItemKind::Impl(Impl { of_trait: Some(ref trait_ref), items: impl_items, .. }) = item.kind; - if !cx.tcx.has_attr(item.owner_id, sym::automatically_derived); - if let Some(eq_trait) = cx.tcx.lang_items().eq_trait(); - if trait_ref.path.res.def_id() == eq_trait; - then { - for impl_item in *impl_items { - if impl_item.ident.name == sym::ne { - span_lint_hir( - cx, - PARTIALEQ_NE_IMPL, - impl_item.id.hir_id(), - impl_item.span, - "re-implementing `PartialEq::ne` is unnecessary", - ); - } + if let ItemKind::Impl(Impl { + of_trait: Some(ref trait_ref), + items: impl_items, + .. + }) = item.kind + && !cx.tcx.has_attr(item.owner_id, sym::automatically_derived) + && let Some(eq_trait) = cx.tcx.lang_items().eq_trait() + && trait_ref.path.res.def_id() == eq_trait + { + for impl_item in *impl_items { + if impl_item.ident.name == sym::ne { + span_lint_hir( + cx, + PARTIALEQ_NE_IMPL, + impl_item.id.hir_id(), + impl_item.span, + "re-implementing `PartialEq::ne` is unnecessary", + ); } } }; diff --git a/src/tools/clippy/clippy_lints/src/partialeq_to_none.rs b/src/tools/clippy/clippy_lints/src/partialeq_to_none.rs index 11e9a2bc3..6d4216970 100644 --- a/src/tools/clippy/clippy_lints/src/partialeq_to_none.rs +++ b/src/tools/clippy/clippy_lints/src/partialeq_to_none.rs @@ -4,7 +4,7 @@ use clippy_utils::{is_res_lang_ctor, path_res, peel_hir_expr_refs, peel_ref_oper use rustc_errors::Applicability; use rustc_hir::{BinOpKind, Expr, ExprKind, LangItem}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/pass_by_ref_or_value.rs b/src/tools/clippy/clippy_lints/src/pass_by_ref_or_value.rs index 4d7a055da..57d37067e 100644 --- a/src/tools/clippy/clippy_lints/src/pass_by_ref_or_value.rs +++ b/src/tools/clippy/clippy_lints/src/pass_by_ref_or_value.rs @@ -5,7 +5,6 @@ use clippy_utils::source::snippet; use clippy_utils::ty::{for_each_top_level_late_bound_region, is_copy}; use clippy_utils::{is_self, is_self_ty}; use core::ops::ControlFlow; -use if_chain::if_chain; use rustc_ast::attr; use rustc_data_structures::fx::FxHashSet; use rustc_errors::Applicability; @@ -16,11 +15,10 @@ use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::adjustment::{Adjust, PointerCoercion}; use rustc_middle::ty::layout::LayoutOf; use rustc_middle::ty::{self, RegionKind}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::def_id::LocalDefId; use rustc_span::{sym, Span}; use rustc_target::spec::abi::Abi; -use rustc_target::spec::Target; declare_clippy_lint! { /// ### What it does @@ -117,10 +115,10 @@ impl<'tcx> PassByRefOrValue { ref_min_size: Option<u64>, value_max_size: u64, avoid_breaking_exported_api: bool, - target: &Target, + pointer_width: u32, ) -> Self { let ref_min_size = ref_min_size.unwrap_or_else(|| { - let bit_width = u64::from(target.pointer_width); + let bit_width = u64::from(pointer_width); // Cap the calculated bit width at 32-bits to reduce // portability problems between 32 and 64-bit targets let bit_width = cmp::min(bit_width, 32); @@ -168,18 +166,18 @@ impl<'tcx> PassByRefOrValue { match *ty.skip_binder().kind() { ty::Ref(lt, ty, Mutability::Not) => { match lt.kind() { - RegionKind::ReLateBound(index, region) + RegionKind::ReBound(index, region) if index.as_u32() == 0 && output_regions.contains(®ion) => { continue; }, // Early bound regions on functions are either from the containing item, are bounded by another // lifetime, or are used as a bound for a type or lifetime. - RegionKind::ReEarlyBound(..) => continue, + RegionKind::ReEarlyParam(..) => continue, _ => (), } - let ty = cx.tcx.erase_late_bound_regions(fn_sig.rebind(ty)); + let ty = cx.tcx.instantiate_bound_regions_with_erased(fn_sig.rebind(ty)); if is_copy(cx, ty) && let Some(size) = cx.layout_of(ty).ok().map(|l| l.size.bytes()) && size <= self.ref_min_size @@ -227,24 +225,25 @@ impl<'tcx> PassByRefOrValue { _ => continue, } } - let ty = cx.tcx.erase_late_bound_regions(ty); + let ty = cx.tcx.instantiate_bound_regions_with_erased(ty); - if_chain! { - if is_copy(cx, ty); - if !is_self_ty(input); - if let Some(size) = cx.layout_of(ty).ok().map(|l| l.size.bytes()); - if size > self.value_max_size; - then { - span_lint_and_sugg( - cx, - LARGE_TYPES_PASSED_BY_VALUE, - input.span, - &format!("this argument ({size} byte) is passed by value, but might be more efficient if passed by reference (limit: {} byte)", self.value_max_size), - "consider passing by reference instead", - format!("&{}", snippet(cx, input.span, "_")), - Applicability::MaybeIncorrect, - ); - } + if is_copy(cx, ty) + && !is_self_ty(input) + && let Some(size) = cx.layout_of(ty).ok().map(|l| l.size.bytes()) + && size > self.value_max_size + { + span_lint_and_sugg( + cx, + LARGE_TYPES_PASSED_BY_VALUE, + input.span, + &format!( + "this argument ({size} byte) is passed by value, but might be more efficient if passed by reference (limit: {} byte)", + self.value_max_size + ), + "consider passing by reference instead", + format!("&{}", snippet(cx, input.span, "_")), + Applicability::MaybeIncorrect, + ); } }, @@ -280,7 +279,7 @@ impl<'tcx> LateLintPass<'tcx> for PassByRefOrValue { return; } - let hir_id = cx.tcx.hir().local_def_id_to_hir_id(def_id); + let hir_id = cx.tcx.local_def_id_to_hir_id(def_id); match kind { FnKind::ItemFn(.., header) => { if header.abi != Abi::Rust { diff --git a/src/tools/clippy/clippy_lints/src/pattern_type_mismatch.rs b/src/tools/clippy/clippy_lints/src/pattern_type_mismatch.rs index dcd1e7af0..60ced9c12 100644 --- a/src/tools/clippy/clippy_lints/src/pattern_type_mismatch.rs +++ b/src/tools/clippy/clippy_lints/src/pattern_type_mismatch.rs @@ -3,7 +3,7 @@ use rustc_hir::{intravisit, Body, Expr, ExprKind, FnDecl, Let, LocalSource, Muta use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; use rustc_middle::ty; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::def_id::LocalDefId; use rustc_span::Span; diff --git a/src/tools/clippy/clippy_lints/src/permissions_set_readonly_false.rs b/src/tools/clippy/clippy_lints/src/permissions_set_readonly_false.rs index b98005d59..704acdc10 100644 --- a/src/tools/clippy/clippy_lints/src/permissions_set_readonly_false.rs +++ b/src/tools/clippy/clippy_lints/src/permissions_set_readonly_false.rs @@ -3,7 +3,7 @@ use clippy_utils::ty::is_type_diagnostic_item; use rustc_ast::ast::LitKind; use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/precedence.rs b/src/tools/clippy/clippy_lints/src/precedence.rs index 057b7e306..ff83725da 100644 --- a/src/tools/clippy/clippy_lints/src/precedence.rs +++ b/src/tools/clippy/clippy_lints/src/precedence.rs @@ -1,11 +1,10 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet_with_applicability; -use if_chain::if_chain; use rustc_ast::ast::{BinOpKind, Expr, ExprKind, MethodCall, UnOp}; use rustc_ast::token; use rustc_errors::Applicability; use rustc_lint::{EarlyContext, EarlyLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::source_map::Spanned; const ALLOWED_ODD_FUNCTIONS: [&str; 14] = [ @@ -79,7 +78,7 @@ impl EarlyLintPass for Precedence { let sugg = format!( "({}) {} ({})", snippet_with_applicability(cx, left.span, "..", &mut applicability), - op.to_string(), + op.as_str(), snippet_with_applicability(cx, right.span, "..", &mut applicability) ); span_sugg(expr, sugg, applicability); @@ -88,7 +87,7 @@ impl EarlyLintPass for Precedence { let sugg = format!( "({}) {} {}", snippet_with_applicability(cx, left.span, "..", &mut applicability), - op.to_string(), + op.as_str(), snippet_with_applicability(cx, right.span, "..", &mut applicability) ); span_sugg(expr, sugg, applicability); @@ -97,7 +96,7 @@ impl EarlyLintPass for Precedence { let sugg = format!( "{} {} ({})", snippet_with_applicability(cx, left.span, "..", &mut applicability), - op.to_string(), + op.as_str(), snippet_with_applicability(cx, right.span, "..", &mut applicability) ); span_sugg(expr, sugg, applicability); @@ -118,25 +117,23 @@ impl EarlyLintPass for Precedence { arg = receiver; } - if_chain! { - if !all_odd; - if let ExprKind::Lit(lit) = &arg.kind; - if let token::LitKind::Integer | token::LitKind::Float = &lit.kind; - then { - let mut applicability = Applicability::MachineApplicable; - span_lint_and_sugg( - cx, - PRECEDENCE, - expr.span, - "unary minus has lower precedence than method call", - "consider adding parentheses to clarify your intent", - format!( - "-({})", - snippet_with_applicability(cx, operand.span, "..", &mut applicability) - ), - applicability, - ); - } + if !all_odd + && let ExprKind::Lit(lit) = &arg.kind + && let token::LitKind::Integer | token::LitKind::Float = &lit.kind + { + let mut applicability = Applicability::MachineApplicable; + span_lint_and_sugg( + cx, + PRECEDENCE, + expr.span, + "unary minus has lower precedence than method call", + "consider adding parentheses to clarify your intent", + format!( + "-({})", + snippet_with_applicability(cx, operand.span, "..", &mut applicability) + ), + applicability, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/ptr.rs b/src/tools/clippy/clippy_lints/src/ptr.rs index 83863b92c..2587b3881 100644 --- a/src/tools/clippy/clippy_lints/src/ptr.rs +++ b/src/tools/clippy/clippy_lints/src/ptr.rs @@ -20,14 +20,16 @@ use rustc_infer::traits::{Obligation, ObligationCause}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::hir::nested_filter; use rustc_middle::ty::{self, Binder, ClauseKind, ExistentialPredicate, List, PredicateKind, Ty}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; -use rustc_span::{sym, Span}; +use rustc_session::declare_lint_pass; use rustc_span::symbol::Symbol; +use rustc_span::{sym, Span}; use rustc_target::spec::abi::Abi; use rustc_trait_selection::infer::InferCtxtExt as _; use rustc_trait_selection::traits::query::evaluate_obligation::InferCtxtExt as _; use std::{fmt, iter}; +use crate::vec::is_allowed_vec_method; + declare_clippy_lint! { /// ### What it does /// This lint checks for function arguments of type `&String`, `&Vec`, @@ -465,9 +467,9 @@ fn check_fn_args<'cx, 'tcx: 'cx>( .walk() .filter_map(|arg| { arg.as_region().and_then(|lifetime| match lifetime.kind() { - ty::ReEarlyBound(r) => Some(r.def_id), - ty::ReLateBound(_, r) => r.kind.get_id(), - ty::ReFree(r) => r.bound_region.get_id(), + ty::ReEarlyParam(r) => Some(r.def_id), + ty::ReBound(_, r) => r.kind.get_id(), + ty::ReLateParam(r) => r.bound_region.get_id(), ty::ReStatic | ty::ReVar(_) | ty::RePlaceholder(_) @@ -660,7 +662,7 @@ fn check_ptr_arg_usage<'tcx>(cx: &LateContext<'tcx>, body: &'tcx Body<'_>, args: }, // If the types match check for methods which exist on both types. e.g. `Vec::len` and // `slice::len` - ty::Adt(def, _) if def.did() == args.ty_did => { + ty::Adt(def, _) if def.did() == args.ty_did && !is_allowed_vec_method(self.cx, e) => { set_skip_flag(); }, _ => (), @@ -712,23 +714,25 @@ fn matches_preds<'tcx>( preds: &'tcx [ty::PolyExistentialPredicate<'tcx>], ) -> bool { let infcx = cx.tcx.infer_ctxt().build(); - preds.iter().all(|&p| match cx.tcx.erase_late_bound_regions(p) { - ExistentialPredicate::Trait(p) => infcx - .type_implements_trait(p.def_id, [ty.into()].into_iter().chain(p.args.iter()), cx.param_env) - .must_apply_modulo_regions(), - ExistentialPredicate::Projection(p) => infcx.predicate_must_hold_modulo_regions(&Obligation::new( - cx.tcx, - ObligationCause::dummy(), - cx.param_env, - cx.tcx - .mk_predicate(Binder::dummy(PredicateKind::Clause(ClauseKind::Projection( - p.with_self_ty(cx.tcx, ty), - )))), - )), - ExistentialPredicate::AutoTrait(p) => infcx - .type_implements_trait(p, [ty], cx.param_env) - .must_apply_modulo_regions(), - }) + preds + .iter() + .all(|&p| match cx.tcx.instantiate_bound_regions_with_erased(p) { + ExistentialPredicate::Trait(p) => infcx + .type_implements_trait(p.def_id, [ty.into()].into_iter().chain(p.args.iter()), cx.param_env) + .must_apply_modulo_regions(), + ExistentialPredicate::Projection(p) => infcx.predicate_must_hold_modulo_regions(&Obligation::new( + cx.tcx, + ObligationCause::dummy(), + cx.param_env, + cx.tcx + .mk_predicate(Binder::dummy(PredicateKind::Clause(ClauseKind::Projection( + p.with_self_ty(cx.tcx, ty), + )))), + )), + ExistentialPredicate::AutoTrait(p) => infcx + .type_implements_trait(p, [ty], cx.param_env) + .must_apply_modulo_regions(), + }) } fn get_ref_lm<'tcx>(ty: &'tcx hir::Ty<'tcx>) -> Option<(&'tcx Lifetime, Mutability, Span)> { diff --git a/src/tools/clippy/clippy_lints/src/ptr_offset_with_cast.rs b/src/tools/clippy/clippy_lints/src/ptr_offset_with_cast.rs index 66d869bc4..ff8ec2ad5 100644 --- a/src/tools/clippy/clippy_lints/src/ptr_offset_with_cast.rs +++ b/src/tools/clippy/clippy_lints/src/ptr_offset_with_cast.rs @@ -3,7 +3,7 @@ use clippy_utils::source::snippet_opt; use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; use std::fmt; diff --git a/src/tools/clippy/clippy_lints/src/pub_use.rs b/src/tools/clippy/clippy_lints/src/pub_use.rs index 316a72988..c0e999e76 100644 --- a/src/tools/clippy/clippy_lints/src/pub_use.rs +++ b/src/tools/clippy/clippy_lints/src/pub_use.rs @@ -1,7 +1,7 @@ use clippy_utils::diagnostics::span_lint_and_help; use rustc_ast::ast::{Item, ItemKind, VisibilityKind}; use rustc_lint::{EarlyContext, EarlyLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/question_mark.rs b/src/tools/clippy/clippy_lints/src/question_mark.rs index b133635e8..fc5835408 100644 --- a/src/tools/clippy/clippy_lints/src/question_mark.rs +++ b/src/tools/clippy/clippy_lints/src/question_mark.rs @@ -10,7 +10,6 @@ use clippy_utils::{ is_res_lang_ctor, pat_and_expr_can_be_question_mark, path_to_local, path_to_local_id, peel_blocks, peel_blocks_with_stmt, }; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::def::Res; use rustc_hir::LangItem::{self, OptionNone, OptionSome, ResultErr, ResultOk}; @@ -19,7 +18,7 @@ use rustc_hir::{ }; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::Ty; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::sym; use rustc_span::symbol::Symbol; @@ -179,17 +178,15 @@ fn expr_return_none_or_err( _ => false, }, ExprKind::Call(call_expr, args_expr) => { - if_chain! { - if smbl == sym::Result; - if let ExprKind::Path(QPath::Resolved(_, path)) = &call_expr.kind; - if let Some(segment) = path.segments.first(); - if let Some(err_sym) = err_sym; - if let Some(arg) = args_expr.first(); - if let ExprKind::Path(QPath::Resolved(_, arg_path)) = &arg.kind; - if let Some(PathSegment { ident, .. }) = arg_path.segments.first(); - then { - return segment.ident.name == sym::Err && err_sym == ident.name; - } + if smbl == sym::Result + && let ExprKind::Path(QPath::Resolved(_, path)) = &call_expr.kind + && let Some(segment) = path.segments.first() + && let Some(err_sym) = err_sym + && let Some(arg) = args_expr.first() + && let ExprKind::Path(QPath::Resolved(_, arg_path)) = &arg.kind + && let Some(PathSegment { ident, .. }) = arg_path.segments.first() + { + return segment.ident.name == sym::Err && err_sym == ident.name; } false }, @@ -218,81 +215,85 @@ impl QuestionMark { /// /// If it matches, it will suggest to use the question mark operator instead fn check_is_none_or_err_and_early_return<'tcx>(&self, cx: &LateContext<'tcx>, expr: &Expr<'tcx>) { - if_chain! { - if !self.inside_try_block(); - if let Some(higher::If { cond, then, r#else }) = higher::If::hir(expr); - if !is_else_clause(cx.tcx, expr); - if let ExprKind::MethodCall(segment, caller, ..) = &cond.kind; - let caller_ty = cx.typeck_results().expr_ty(caller); - let if_block = IfBlockType::IfIs(caller, caller_ty, segment.ident.name, then, r#else); - if is_early_return(sym::Option, cx, &if_block) || is_early_return(sym::Result, cx, &if_block); - then { - let mut applicability = Applicability::MachineApplicable; - let receiver_str = snippet_with_applicability(cx, caller.span, "..", &mut applicability); - let by_ref = !caller_ty.is_copy_modulo_regions(cx.tcx, cx.param_env) && - !matches!(caller.kind, ExprKind::Call(..) | ExprKind::MethodCall(..)); - let sugg = if let Some(else_inner) = r#else { - if eq_expr_value(cx, caller, peel_blocks(else_inner)) { - format!("Some({receiver_str}?)") - } else { - return; - } + if !self.inside_try_block() + && let Some(higher::If { cond, then, r#else }) = higher::If::hir(expr) + && !is_else_clause(cx.tcx, expr) + && let ExprKind::MethodCall(segment, caller, ..) = &cond.kind + && let caller_ty = cx.typeck_results().expr_ty(caller) + && let if_block = IfBlockType::IfIs(caller, caller_ty, segment.ident.name, then, r#else) + && (is_early_return(sym::Option, cx, &if_block) || is_early_return(sym::Result, cx, &if_block)) + { + let mut applicability = Applicability::MachineApplicable; + let receiver_str = snippet_with_applicability(cx, caller.span, "..", &mut applicability); + let by_ref = !caller_ty.is_copy_modulo_regions(cx.tcx, cx.param_env) + && !matches!(caller.kind, ExprKind::Call(..) | ExprKind::MethodCall(..)); + let sugg = if let Some(else_inner) = r#else { + if eq_expr_value(cx, caller, peel_blocks(else_inner)) { + format!("Some({receiver_str}?)") } else { - format!("{receiver_str}{}?;", if by_ref { ".as_ref()" } else { "" }) - }; + return; + } + } else { + format!("{receiver_str}{}?;", if by_ref { ".as_ref()" } else { "" }) + }; - span_lint_and_sugg( - cx, - QUESTION_MARK, - expr.span, - "this block may be rewritten with the `?` operator", - "replace it with", - sugg, - applicability, - ); - } + span_lint_and_sugg( + cx, + QUESTION_MARK, + expr.span, + "this block may be rewritten with the `?` operator", + "replace it with", + sugg, + applicability, + ); } } fn check_if_let_some_or_err_and_early_return<'tcx>(&self, cx: &LateContext<'tcx>, expr: &Expr<'tcx>) { - if_chain! { - if !self.inside_try_block(); - if let Some(higher::IfLet { let_pat, let_expr, if_then, if_else }) = higher::IfLet::hir(cx, expr); - if !is_else_clause(cx.tcx, expr); - if let PatKind::TupleStruct(ref path1, [field], ddpos) = let_pat.kind; - if ddpos.as_opt_usize().is_none(); - if let PatKind::Binding(BindingAnnotation(by_ref, _), bind_id, ident, None) = field.kind; - let caller_ty = cx.typeck_results().expr_ty(let_expr); - let if_block = IfBlockType::IfLet( + if !self.inside_try_block() + && let Some(higher::IfLet { + let_pat, + let_expr, + if_then, + if_else, + }) = higher::IfLet::hir(cx, expr) + && !is_else_clause(cx.tcx, expr) + && let PatKind::TupleStruct(ref path1, [field], ddpos) = let_pat.kind + && ddpos.as_opt_usize().is_none() + && let PatKind::Binding(BindingAnnotation(by_ref, _), bind_id, ident, None) = field.kind + && let caller_ty = cx.typeck_results().expr_ty(let_expr) + && let if_block = IfBlockType::IfLet( cx.qpath_res(path1, let_pat.hir_id), caller_ty, ident.name, let_expr, if_then, - if_else + if_else, + ) + && ((is_early_return(sym::Option, cx, &if_block) && path_to_local_id(peel_blocks(if_then), bind_id)) + || is_early_return(sym::Result, cx, &if_block)) + && if_else + .map(|e| eq_expr_value(cx, let_expr, peel_blocks(e))) + .filter(|e| *e) + .is_none() + { + let mut applicability = Applicability::MachineApplicable; + let receiver_str = snippet_with_applicability(cx, let_expr.span, "..", &mut applicability); + let requires_semi = matches!(get_parent_node(cx.tcx, expr.hir_id), Some(Node::Stmt(_))); + let sugg = format!( + "{receiver_str}{}?{}", + if by_ref == ByRef::Yes { ".as_ref()" } else { "" }, + if requires_semi { ";" } else { "" } + ); + span_lint_and_sugg( + cx, + QUESTION_MARK, + expr.span, + "this block may be rewritten with the `?` operator", + "replace it with", + sugg, + applicability, ); - if (is_early_return(sym::Option, cx, &if_block) && path_to_local_id(peel_blocks(if_then), bind_id)) - || is_early_return(sym::Result, cx, &if_block); - if if_else.map(|e| eq_expr_value(cx, let_expr, peel_blocks(e))).filter(|e| *e).is_none(); - then { - let mut applicability = Applicability::MachineApplicable; - let receiver_str = snippet_with_applicability(cx, let_expr.span, "..", &mut applicability); - let requires_semi = matches!(get_parent_node(cx.tcx, expr.hir_id), Some(Node::Stmt(_))); - let sugg = format!( - "{receiver_str}{}?{}", - if by_ref == ByRef::Yes { ".as_ref()" } else { "" }, - if requires_semi { ";" } else { "" } - ); - span_lint_and_sugg( - cx, - QUESTION_MARK, - expr.span, - "this block may be rewritten with the `?` operator", - "replace it with", - sugg, - applicability, - ); - } } } } diff --git a/src/tools/clippy/clippy_lints/src/question_mark_used.rs b/src/tools/clippy/clippy_lints/src/question_mark_used.rs index d0de33e3c..ddfc53083 100644 --- a/src/tools/clippy/clippy_lints/src/question_mark_used.rs +++ b/src/tools/clippy/clippy_lints/src/question_mark_used.rs @@ -3,7 +3,7 @@ use clippy_utils::diagnostics::span_lint_and_help; use clippy_utils::macros::span_is_local; use rustc_hir::{Expr, ExprKind, MatchSource}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/ranges.rs b/src/tools/clippy/clippy_lints/src/ranges.rs index 1b3081abc..6b54258dd 100644 --- a/src/tools/clippy/clippy_lints/src/ranges.rs +++ b/src/tools/clippy/clippy_lints/src/ranges.rs @@ -4,15 +4,14 @@ use clippy_utils::diagnostics::{span_lint, span_lint_and_sugg, span_lint_and_the use clippy_utils::source::{snippet, snippet_opt, snippet_with_applicability}; use clippy_utils::sugg::Sugg; use clippy_utils::{get_parent_expr, higher, in_constant, is_integer_const, path_to_local}; -use if_chain::if_chain; use rustc_ast::ast::RangeLimits; use rustc_errors::Applicability; use rustc_hir::{BinOpKind, Expr, ExprKind, HirId}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty; -use rustc_session::{declare_tool_lint, impl_lint_pass}; -use rustc_span::Span; +use rustc_session::impl_lint_pass; use rustc_span::source_map::Spanned; +use rustc_span::Span; use std::cmp::Ordering; declare_clippy_lint! { @@ -283,16 +282,14 @@ fn check_possible_range_contains( // If the LHS is the same operator, we have to recurse to get the "real" RHS, since they have // the same operator precedence - if_chain! { - if let ExprKind::Binary(ref lhs_op, _left, new_lhs) = left.kind; - if op == lhs_op.node; - let new_span = Span::new(new_lhs.span.lo(), right.span.hi(), expr.span.ctxt(), expr.span.parent()); - if let Some(snip) = &snippet_opt(cx, new_span); + if let ExprKind::Binary(ref lhs_op, _left, new_lhs) = left.kind + && op == lhs_op.node + && let new_span = Span::new(new_lhs.span.lo(), right.span.hi(), expr.span.ctxt(), expr.span.parent()) + && let Some(snip) = &snippet_opt(cx, new_span) // Do not continue if we have mismatched number of parens, otherwise the suggestion is wrong - if snip.matches('(').count() == snip.matches(')').count(); - then { - check_possible_range_contains(cx, op, new_lhs, right, expr, new_span); - } + && snip.matches('(').count() == snip.matches(')').count() + { + check_possible_range_contains(cx, op, new_lhs, right, expr, new_span); } } @@ -349,71 +346,66 @@ fn check_range_bounds<'a, 'tcx>(cx: &'a LateContext<'tcx>, ex: &'a Expr<'_>) -> // exclusive range plus one: `x..(y+1)` fn check_exclusive_range_plus_one(cx: &LateContext<'_>, expr: &Expr<'_>) { - if_chain! { - if expr.span.can_be_used_for_suggestions(); - if let Some(higher::Range { + if expr.span.can_be_used_for_suggestions() + && let Some(higher::Range { start, end: Some(end), - limits: RangeLimits::HalfOpen - }) = higher::Range::hir(expr); - if let Some(y) = y_plus_one(cx, end); - then { - let span = expr.span; - span_lint_and_then( - cx, - RANGE_PLUS_ONE, - span, - "an inclusive range would be more readable", - |diag| { - let start = start.map_or(String::new(), |x| Sugg::hir(cx, x, "x").maybe_par().to_string()); - let end = Sugg::hir(cx, y, "y").maybe_par(); - if let Some(is_wrapped) = &snippet_opt(cx, span) { - if is_wrapped.starts_with('(') && is_wrapped.ends_with(')') { - diag.span_suggestion( - span, - "use", - format!("({start}..={end})"), - Applicability::MaybeIncorrect, - ); - } else { - diag.span_suggestion( - span, - "use", - format!("{start}..={end}"), - Applicability::MachineApplicable, // snippet - ); - } + limits: RangeLimits::HalfOpen, + }) = higher::Range::hir(expr) + && let Some(y) = y_plus_one(cx, end) + { + let span = expr.span; + span_lint_and_then( + cx, + RANGE_PLUS_ONE, + span, + "an inclusive range would be more readable", + |diag| { + let start = start.map_or(String::new(), |x| Sugg::hir(cx, x, "x").maybe_par().to_string()); + let end = Sugg::hir(cx, y, "y").maybe_par(); + if let Some(is_wrapped) = &snippet_opt(cx, span) { + if is_wrapped.starts_with('(') && is_wrapped.ends_with(')') { + diag.span_suggestion(span, "use", format!("({start}..={end})"), Applicability::MaybeIncorrect); + } else { + diag.span_suggestion( + span, + "use", + format!("{start}..={end}"), + Applicability::MachineApplicable, // snippet + ); } - }, - ); - } + } + }, + ); } } // inclusive range minus one: `x..=(y-1)` fn check_inclusive_range_minus_one(cx: &LateContext<'_>, expr: &Expr<'_>) { - if_chain! { - if expr.span.can_be_used_for_suggestions(); - if let Some(higher::Range { start, end: Some(end), limits: RangeLimits::Closed }) = higher::Range::hir(expr); - if let Some(y) = y_minus_one(cx, end); - then { - span_lint_and_then( - cx, - RANGE_MINUS_ONE, - expr.span, - "an exclusive range would be more readable", - |diag| { - let start = start.map_or(String::new(), |x| Sugg::hir(cx, x, "x").maybe_par().to_string()); - let end = Sugg::hir(cx, y, "y").maybe_par(); - diag.span_suggestion( - expr.span, - "use", - format!("{start}..{end}"), - Applicability::MachineApplicable, // snippet - ); - }, - ); - } + if expr.span.can_be_used_for_suggestions() + && let Some(higher::Range { + start, + end: Some(end), + limits: RangeLimits::Closed, + }) = higher::Range::hir(expr) + && let Some(y) = y_minus_one(cx, end) + { + span_lint_and_then( + cx, + RANGE_MINUS_ONE, + expr.span, + "an exclusive range would be more readable", + |diag| { + let start = start.map_or(String::new(), |x| Sugg::hir(cx, x, "x").maybe_par().to_string()); + let end = Sugg::hir(cx, y, "y").maybe_par(); + diag.span_suggestion( + expr.span, + "use", + format!("{start}..{end}"), + Applicability::MachineApplicable, // snippet + ); + }, + ); } } @@ -447,52 +439,54 @@ fn check_reversed_empty_range(cx: &LateContext<'_>, expr: &Expr<'_>) { } } - if_chain! { - if let Some(higher::Range { start: Some(start), end: Some(end), limits }) = higher::Range::hir(expr); - let ty = cx.typeck_results().expr_ty(start); - if let ty::Int(_) | ty::Uint(_) = ty.kind(); - if let Some(start_idx) = constant(cx, cx.typeck_results(), start); - if let Some(end_idx) = constant(cx, cx.typeck_results(), end); - if let Some(ordering) = Constant::partial_cmp(cx.tcx, ty, &start_idx, &end_idx); - if is_empty_range(limits, ordering); - then { - if inside_indexing_expr(cx, expr) { - // Avoid linting `N..N` as it has proven to be useful, see #5689 and #5628 ... - if ordering != Ordering::Equal { - span_lint( - cx, - REVERSED_EMPTY_RANGES, - expr.span, - "this range is reversed and using it to index a slice will panic at run-time", - ); - } - // ... except in for loop arguments for backwards compatibility with `reverse_range_loop` - } else if ordering != Ordering::Equal || is_for_loop_arg(cx, expr) { - span_lint_and_then( + if let Some(higher::Range { + start: Some(start), + end: Some(end), + limits, + }) = higher::Range::hir(expr) + && let ty = cx.typeck_results().expr_ty(start) + && let ty::Int(_) | ty::Uint(_) = ty.kind() + && let Some(start_idx) = constant(cx, cx.typeck_results(), start) + && let Some(end_idx) = constant(cx, cx.typeck_results(), end) + && let Some(ordering) = Constant::partial_cmp(cx.tcx, ty, &start_idx, &end_idx) + && is_empty_range(limits, ordering) + { + if inside_indexing_expr(cx, expr) { + // Avoid linting `N..N` as it has proven to be useful, see #5689 and #5628 ... + if ordering != Ordering::Equal { + span_lint( cx, REVERSED_EMPTY_RANGES, expr.span, - "this range is empty so it will yield no values", - |diag| { - if ordering != Ordering::Equal { - let start_snippet = snippet(cx, start.span, "_"); - let end_snippet = snippet(cx, end.span, "_"); - let dots = match limits { - RangeLimits::HalfOpen => "..", - RangeLimits::Closed => "..=" - }; - - diag.span_suggestion( - expr.span, - "consider using the following if you are attempting to iterate over this \ - range in reverse", - format!("({end_snippet}{dots}{start_snippet}).rev()"), - Applicability::MaybeIncorrect, - ); - } - }, + "this range is reversed and using it to index a slice will panic at run-time", ); } + // ... except in for loop arguments for backwards compatibility with `reverse_range_loop` + } else if ordering != Ordering::Equal || is_for_loop_arg(cx, expr) { + span_lint_and_then( + cx, + REVERSED_EMPTY_RANGES, + expr.span, + "this range is empty so it will yield no values", + |diag| { + if ordering != Ordering::Equal { + let start_snippet = snippet(cx, start.span, "_"); + let end_snippet = snippet(cx, end.span, "_"); + let dots = match limits { + RangeLimits::HalfOpen => "..", + RangeLimits::Closed => "..=", + }; + + diag.span_suggestion( + expr.span, + "consider using the following if you are attempting to iterate over this \ + range in reverse", + format!("({end_snippet}{dots}{start_snippet}).rev()"), + Applicability::MaybeIncorrect, + ); + } + }, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/raw_strings.rs b/src/tools/clippy/clippy_lints/src/raw_strings.rs index 391c77dbf..ac29d2730 100644 --- a/src/tools/clippy/clippy_lints/src/raw_strings.rs +++ b/src/tools/clippy/clippy_lints/src/raw_strings.rs @@ -8,7 +8,7 @@ use rustc_ast::token::LitKind; use rustc_errors::Applicability; use rustc_lint::{EarlyContext, EarlyLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::{BytePos, Pos, Span}; declare_clippy_lint! { @@ -56,7 +56,7 @@ declare_clippy_lint! { impl_lint_pass!(RawStrings => [NEEDLESS_RAW_STRINGS, NEEDLESS_RAW_STRING_HASHES]); pub struct RawStrings { - pub needless_raw_string_hashes_allow_one: bool, + pub allow_one_hash_in_raw_strings: bool, } impl EarlyLintPass for RawStrings { diff --git a/src/tools/clippy/clippy_lints/src/rc_clone_in_vec_init.rs b/src/tools/clippy/clippy_lints/src/rc_clone_in_vec_init.rs index 59ce289e7..d0b45b595 100644 --- a/src/tools/clippy/clippy_lints/src/rc_clone_in_vec_init.rs +++ b/src/tools/clippy/clippy_lints/src/rc_clone_in_vec_init.rs @@ -7,7 +7,7 @@ use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind, QPath, TyKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::{sym, Span, Symbol}; declare_clippy_lint! { @@ -118,26 +118,24 @@ fn emit_lint(cx: &LateContext<'_>, symbol: Symbol, lint_span: Span, elem: &Expr< /// Checks whether the given `expr` is a call to `Arc::new`, `Rc::new`, or evaluates to a `Weak` fn ref_init(cx: &LateContext<'_>, expr: &Expr<'_>) -> Option<(Symbol, Span)> { - if_chain! { - if let ExprKind::Call(func, _args) = expr.kind; - if let ExprKind::Path(ref func_path @ QPath::TypeRelative(ty, _)) = func.kind; - if let TyKind::Path(ref ty_path) = ty.kind; - if let Some(def_id) = cx.qpath_res(ty_path, ty.hir_id).opt_def_id(); - - then { - if last_path_segment(func_path).ident.name == sym::new - && let Some(symbol) = cx - .tcx - .get_diagnostic_name(def_id) - .filter(|symbol| symbol == &sym::Arc || symbol == &sym::Rc) { - return Some((symbol, func.span)); - } + if let ExprKind::Call(func, _args) = expr.kind + && let ExprKind::Path(ref func_path @ QPath::TypeRelative(ty, _)) = func.kind + && let TyKind::Path(ref ty_path) = ty.kind + && let Some(def_id) = cx.qpath_res(ty_path, ty.hir_id).opt_def_id() + { + if last_path_segment(func_path).ident.name == sym::new + && let Some(symbol) = cx + .tcx + .get_diagnostic_name(def_id) + .filter(|symbol| symbol == &sym::Arc || symbol == &sym::Rc) + { + return Some((symbol, func.span)); + } - if let ty::Adt(adt, _) = *cx.typeck_results().expr_ty(expr).kind() - && matches!(cx.tcx.get_diagnostic_name(adt.did()), Some(sym::RcWeak | sym::ArcWeak)) - { - return Some((Symbol::intern("Weak"), func.span)); - } + if let ty::Adt(adt, _) = *cx.typeck_results().expr_ty(expr).kind() + && matches!(cx.tcx.get_diagnostic_name(adt.did()), Some(sym::RcWeak | sym::ArcWeak)) + { + return Some((Symbol::intern("Weak"), func.span)); } } diff --git a/src/tools/clippy/clippy_lints/src/read_zero_byte_vec.rs b/src/tools/clippy/clippy_lints/src/read_zero_byte_vec.rs index b27d4cc6e..62f3c09aa 100644 --- a/src/tools/clippy/clippy_lints/src/read_zero_byte_vec.rs +++ b/src/tools/clippy/clippy_lints/src/read_zero_byte_vec.rs @@ -7,7 +7,7 @@ use hir::{Expr, ExprKind, Local, PatKind, PathSegment, QPath, StmtKind}; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/redundant_async_block.rs b/src/tools/clippy/clippy_lints/src/redundant_async_block.rs index 90297ca8b..19d9d64b3 100644 --- a/src/tools/clippy/clippy_lints/src/redundant_async_block.rs +++ b/src/tools/clippy/clippy_lints/src/redundant_async_block.rs @@ -9,7 +9,7 @@ use rustc_hir::{Closure, CoroutineKind, CoroutineSource, Expr, ExprKind, MatchSo use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::lint::in_external_macro; use rustc_middle::ty::UpvarCapture; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/redundant_clone.rs b/src/tools/clippy/clippy_lints/src/redundant_clone.rs index 8daf085a4..c62c351e7 100644 --- a/src/tools/clippy/clippy_lints/src/redundant_clone.rs +++ b/src/tools/clippy/clippy_lints/src/redundant_clone.rs @@ -3,14 +3,13 @@ use clippy_utils::mir::{visit_local_usage, LocalUsage, PossibleBorrowerMap}; use clippy_utils::source::snippet_opt; use clippy_utils::ty::{has_drop, is_copy, is_type_diagnostic_item, is_type_lang_item, walk_ptrs_ty_depth}; use clippy_utils::{fn_has_unsatisfiable_preds, match_def_path, paths}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::intravisit::FnKind; use rustc_hir::{def_id, Body, FnDecl, LangItem}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::mir; use rustc_middle::ty::{self, Ty}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::def_id::LocalDefId; use rustc_span::{sym, BytePos, Span}; @@ -145,18 +144,16 @@ impl<'tcx> LateLintPass<'tcx> for RedundantClone { let pred_terminator = mir[ps[0]].terminator(); // receiver of the `deref()` call - let (pred_arg, deref_clone_ret) = if_chain! { - if let Some((pred_fn_def_id, pred_arg, pred_arg_ty, res)) = - is_call_with_ref_arg(cx, mir, &pred_terminator.kind); - if res == cloned; - if cx.tcx.is_diagnostic_item(sym::deref_method, pred_fn_def_id); - if is_type_diagnostic_item(cx, pred_arg_ty, sym::PathBuf) - || is_type_diagnostic_item(cx, pred_arg_ty, sym::OsString); - then { - (pred_arg, res) - } else { - continue; - } + let (pred_arg, deref_clone_ret) = if let Some((pred_fn_def_id, pred_arg, pred_arg_ty, res)) = + is_call_with_ref_arg(cx, mir, &pred_terminator.kind) + && res == cloned + && cx.tcx.is_diagnostic_item(sym::deref_method, pred_fn_def_id) + && (is_type_diagnostic_item(cx, pred_arg_ty, sym::PathBuf) + || is_type_diagnostic_item(cx, pred_arg_ty, sym::OsString)) + { + (pred_arg, res) + } else { + continue; }; let (local, cannot_move_out) = @@ -211,45 +208,37 @@ impl<'tcx> LateLintPass<'tcx> for RedundantClone { .assert_crate_local() .lint_root; - if_chain! { - if let Some(snip) = snippet_opt(cx, span); - if let Some(dot) = snip.rfind('.'); - then { - let sugg_span = span.with_lo( - span.lo() + BytePos(u32::try_from(dot).unwrap()) - ); - let mut app = Applicability::MaybeIncorrect; - - let call_snip = &snip[dot + 1..]; - // Machine applicable when `call_snip` looks like `foobar()` - if let Some(call_snip) = call_snip.strip_suffix("()").map(str::trim) { - if call_snip.as_bytes().iter().all(|b| b.is_ascii_alphabetic() || *b == b'_') { - app = Applicability::MachineApplicable; - } + if let Some(snip) = snippet_opt(cx, span) + && let Some(dot) = snip.rfind('.') + { + let sugg_span = span.with_lo(span.lo() + BytePos(u32::try_from(dot).unwrap())); + let mut app = Applicability::MaybeIncorrect; + + let call_snip = &snip[dot + 1..]; + // Machine applicable when `call_snip` looks like `foobar()` + if let Some(call_snip) = call_snip.strip_suffix("()").map(str::trim) { + if call_snip + .as_bytes() + .iter() + .all(|b| b.is_ascii_alphabetic() || *b == b'_') + { + app = Applicability::MachineApplicable; } + } - span_lint_hir_and_then(cx, REDUNDANT_CLONE, node, sugg_span, "redundant clone", |diag| { - diag.span_suggestion( - sugg_span, - "remove this", - "", - app, + span_lint_hir_and_then(cx, REDUNDANT_CLONE, node, sugg_span, "redundant clone", |diag| { + diag.span_suggestion(sugg_span, "remove this", "", app); + if clone_usage.cloned_used { + diag.span_note(span, "cloned value is neither consumed nor mutated"); + } else { + diag.span_note( + span.with_hi(span.lo() + BytePos(u32::try_from(dot).unwrap())), + "this value is dropped without further use", ); - if clone_usage.cloned_used { - diag.span_note( - span, - "cloned value is neither consumed nor mutated", - ); - } else { - diag.span_note( - span.with_hi(span.lo() + BytePos(u32::try_from(dot).unwrap())), - "this value is dropped without further use", - ); - } - }); - } else { - span_lint_hir(cx, REDUNDANT_CLONE, node, span, "redundant clone"); - } + } + }); + } else { + span_lint_hir(cx, REDUNDANT_CLONE, node, span, "redundant clone"); } } } @@ -261,18 +250,21 @@ fn is_call_with_ref_arg<'tcx>( mir: &'tcx mir::Body<'tcx>, kind: &'tcx mir::TerminatorKind<'tcx>, ) -> Option<(def_id::DefId, mir::Local, Ty<'tcx>, mir::Local)> { - if_chain! { - if let mir::TerminatorKind::Call { func, args, destination, .. } = kind; - if args.len() == 1; - if let mir::Operand::Move(mir::Place { local, .. }) = &args[0]; - if let ty::FnDef(def_id, _) = *func.ty(mir, cx.tcx).kind(); - if let (inner_ty, 1) = walk_ptrs_ty_depth(args[0].ty(mir, cx.tcx)); - if !is_copy(cx, inner_ty); - then { - Some((def_id, *local, inner_ty, destination.as_local()?)) - } else { - None - } + if let mir::TerminatorKind::Call { + func, + args, + destination, + .. + } = kind + && args.len() == 1 + && let mir::Operand::Move(mir::Place { local, .. }) = &args[0] + && let ty::FnDef(def_id, _) = *func.ty(mir, cx.tcx).kind() + && let (inner_ty, 1) = walk_ptrs_ty_depth(args[0].ty(mir, cx.tcx)) + && !is_copy(cx, inner_ty) + { + Some((def_id, *local, inner_ty, destination.as_local()?)) + } else { + None } } diff --git a/src/tools/clippy/clippy_lints/src/redundant_closure_call.rs b/src/tools/clippy/clippy_lints/src/redundant_closure_call.rs index e679fab53..8bac2e40e 100644 --- a/src/tools/clippy/clippy_lints/src/redundant_closure_call.rs +++ b/src/tools/clippy/clippy_lints/src/redundant_closure_call.rs @@ -2,16 +2,15 @@ use crate::rustc_lint::LintContext; use clippy_utils::diagnostics::{span_lint, span_lint_and_then}; use clippy_utils::get_parent_expr; use clippy_utils::sugg::Sugg; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir as hir; -use rustc_hir::intravisit as hir_visit; use rustc_hir::intravisit::{Visitor as HirVisitor, Visitor}; +use rustc_hir::{intravisit as hir_visit, CoroutineKind, CoroutineSource, Node}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::hir::nested_filter; use rustc_middle::lint::in_external_macro; use rustc_middle::ty; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does @@ -61,11 +60,14 @@ impl<'tcx> Visitor<'tcx> for ReturnVisitor { } } -/// Checks if the body is owned by an async closure -fn is_async_closure(body: &hir::Body<'_>) -> bool { - if let hir::ExprKind::Closure(closure) = body.value.kind - && let [resume_ty] = closure.fn_decl.inputs - && let hir::TyKind::Path(hir::QPath::LangItem(hir::LangItem::ResumeTy, ..)) = resume_ty.kind +/// Checks if the body is owned by an async closure. +/// Returns true for `async || whatever_expression`, but false for `|| async { whatever_expression +/// }`. +fn is_async_closure(cx: &LateContext<'_>, body: &hir::Body<'_>) -> bool { + if let hir::ExprKind::Closure(innermost_closure_generated_by_desugar) = body.value.kind + && let desugared_inner_closure_body = cx.tcx.hir().body(innermost_closure_generated_by_desugar.body) + // checks whether it is `async || whatever_expression` + && let Some(CoroutineKind::Async(CoroutineSource::Closure)) = desugared_inner_closure_body.coroutine_kind { true } else { @@ -101,7 +103,7 @@ fn find_innermost_closure<'tcx>( data = Some(( body.value, closure.fn_decl, - if is_async_closure(body) { + if is_async_closure(cx, body) { ty::Asyncness::Yes } else { ty::Asyncness::No @@ -141,7 +143,7 @@ impl<'tcx> LateLintPass<'tcx> for RedundantClosureCall { } if let hir::ExprKind::Call(recv, _) = expr.kind - // don't lint if the receiver is a call, too. + // don't lint if the receiver is a call, too. // we do this in order to prevent linting multiple times; consider: // `(|| || 1)()()` // ^^ we only want to lint for this call (but we walk up the calls to consider both calls). @@ -174,12 +176,18 @@ impl<'tcx> LateLintPass<'tcx> for RedundantClosureCall { hint = hint.asyncify(); } - diag.span_suggestion( - full_expr.span, - "try doing something like", - hint.maybe_par(), - applicability, - ); + let is_in_fn_call_arg = + clippy_utils::get_parent_node(cx.tcx, expr.hir_id).is_some_and(|x| match x { + Node::Expr(expr) => matches!(expr.kind, hir::ExprKind::Call(_, _)), + _ => false, + }); + + // avoid clippy::double_parens + if !is_in_fn_call_arg { + hint = hint.maybe_par(); + }; + + diag.span_suggestion(full_expr.span, "try doing something like", hint, applicability); } }, ); @@ -201,14 +209,12 @@ impl<'tcx> LateLintPass<'tcx> for RedundantClosureCall { type NestedFilter = nested_filter::OnlyBodies; fn visit_expr(&mut self, expr: &'tcx hir::Expr<'tcx>) { - if_chain! { - if let hir::ExprKind::Call(closure, _) = expr.kind; - if let hir::ExprKind::Path(hir::QPath::Resolved(_, path)) = closure.kind; - if self.path.segments[0].ident == path.segments[0].ident; - if self.path.res == path.res; - then { - self.count += 1; - } + if let hir::ExprKind::Call(closure, _) = expr.kind + && let hir::ExprKind::Path(hir::QPath::Resolved(_, path)) = closure.kind + && self.path.segments[0].ident == path.segments[0].ident + && self.path.res == path.res + { + self.count += 1; } hir_visit::walk_expr(self, expr); } @@ -223,25 +229,23 @@ impl<'tcx> LateLintPass<'tcx> for RedundantClosureCall { } for w in block.stmts.windows(2) { - if_chain! { - if let hir::StmtKind::Local(local) = w[0].kind; - if let Option::Some(t) = local.init; - if let hir::ExprKind::Closure { .. } = t.kind; - if let hir::PatKind::Binding(_, _, ident, _) = local.pat.kind; - if let hir::StmtKind::Semi(second) = w[1].kind; - if let hir::ExprKind::Assign(_, call, _) = second.kind; - if let hir::ExprKind::Call(closure, _) = call.kind; - if let hir::ExprKind::Path(hir::QPath::Resolved(_, path)) = closure.kind; - if ident == path.segments[0].ident; - if count_closure_usage(cx, block, path) == 1; - then { - span_lint( - cx, - REDUNDANT_CLOSURE_CALL, - second.span, - "closure called just once immediately after it was declared", - ); - } + if let hir::StmtKind::Local(local) = w[0].kind + && let Option::Some(t) = local.init + && let hir::ExprKind::Closure { .. } = t.kind + && let hir::PatKind::Binding(_, _, ident, _) = local.pat.kind + && let hir::StmtKind::Semi(second) = w[1].kind + && let hir::ExprKind::Assign(_, call, _) = second.kind + && let hir::ExprKind::Call(closure, _) = call.kind + && let hir::ExprKind::Path(hir::QPath::Resolved(_, path)) = closure.kind + && ident == path.segments[0].ident + && count_closure_usage(cx, block, path) == 1 + { + span_lint( + cx, + REDUNDANT_CLOSURE_CALL, + second.span, + "closure called just once immediately after it was declared", + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/redundant_else.rs b/src/tools/clippy/clippy_lints/src/redundant_else.rs index 221aa317e..001686c84 100644 --- a/src/tools/clippy/clippy_lints/src/redundant_else.rs +++ b/src/tools/clippy/clippy_lints/src/redundant_else.rs @@ -3,7 +3,7 @@ use rustc_ast::ast::{Block, Expr, ExprKind, Stmt, StmtKind}; use rustc_ast::visit::{walk_expr, Visitor}; use rustc_lint::{EarlyContext, EarlyLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does @@ -105,7 +105,9 @@ impl<'ast> Visitor<'ast> for BreakVisitor { fn visit_expr(&mut self, expr: &'ast Expr) { self.is_break = match expr.kind { ExprKind::Break(..) | ExprKind::Continue(..) | ExprKind::Ret(..) => true, - ExprKind::Match(_, ref arms) => arms.iter().all(|arm| self.check_expr(&arm.body)), + ExprKind::Match(_, ref arms) => arms.iter().all(|arm| + arm.body.is_none() || arm.body.as_deref().is_some_and(|body| self.check_expr(body)) + ), ExprKind::If(_, ref then, Some(ref els)) => self.check_block(then) && self.check_expr(els), ExprKind::If(_, _, None) // ignore loops for simplicity diff --git a/src/tools/clippy/clippy_lints/src/redundant_field_names.rs b/src/tools/clippy/clippy_lints/src/redundant_field_names.rs index b8e606df7..fb000cd71 100644 --- a/src/tools/clippy/clippy_lints/src/redundant_field_names.rs +++ b/src/tools/clippy/clippy_lints/src/redundant_field_names.rs @@ -4,7 +4,7 @@ use rustc_ast::ast::{Expr, ExprKind}; use rustc_errors::Applicability; use rustc_lint::{EarlyContext, EarlyLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/redundant_locals.rs b/src/tools/clippy/clippy_lints/src/redundant_locals.rs index 6bc0d0618..2c511ee0b 100644 --- a/src/tools/clippy/clippy_lints/src/redundant_locals.rs +++ b/src/tools/clippy/clippy_lints/src/redundant_locals.rs @@ -6,7 +6,7 @@ use rustc_hir::def::Res; use rustc_hir::{BindingAnnotation, ByRef, ExprKind, HirId, Local, Node, Pat, PatKind, QPath}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::symbol::Ident; use rustc_span::DesugaringKind; @@ -46,40 +46,38 @@ declare_lint_pass!(RedundantLocals => [REDUNDANT_LOCALS]); impl<'tcx> LateLintPass<'tcx> for RedundantLocals { fn check_local(&mut self, cx: &LateContext<'tcx>, local: &'tcx Local<'tcx>) { - if_chain! { - if !local.span.is_desugaring(DesugaringKind::Async); + if !local.span.is_desugaring(DesugaringKind::Async) // the pattern is a single by-value binding - if let PatKind::Binding(BindingAnnotation(ByRef::No, mutability), _, ident, None) = local.pat.kind; + && let PatKind::Binding(BindingAnnotation(ByRef::No, mutability), _, ident, None) = local.pat.kind // the binding is not type-ascribed - if local.ty.is_none(); + && local.ty.is_none() // the expression is a resolved path - if let Some(expr) = local.init; - if let ExprKind::Path(qpath @ QPath::Resolved(None, path)) = expr.kind; + && let Some(expr) = local.init + && let ExprKind::Path(qpath @ QPath::Resolved(None, path)) = expr.kind // the path is a single segment equal to the local's name - if let [last_segment] = path.segments; - if last_segment.ident == ident; + && let [last_segment] = path.segments + && last_segment.ident == ident // resolve the path to its defining binding pattern - if let Res::Local(binding_id) = cx.qpath_res(&qpath, expr.hir_id); - if let Node::Pat(binding_pat) = cx.tcx.hir().get(binding_id); + && let Res::Local(binding_id) = cx.qpath_res(&qpath, expr.hir_id) + && let Node::Pat(binding_pat) = cx.tcx.hir_node(binding_id) // the previous binding has the same mutability - if find_binding(binding_pat, ident).is_some_and(|bind| bind.1 == mutability); + && find_binding(binding_pat, ident).is_some_and(|bind| bind.1 == mutability) // the local does not change the effect of assignments to the binding. see #11290 - if !affects_assignments(cx, mutability, binding_id, local.hir_id); + && !affects_assignments(cx, mutability, binding_id, local.hir_id) // the local does not affect the code's drop behavior - if !needs_ordered_drop(cx, cx.typeck_results().expr_ty(expr)); + && !needs_ordered_drop(cx, cx.typeck_results().expr_ty(expr)) // the local is user-controlled - if !in_external_macro(cx.sess(), local.span); - if !is_from_proc_macro(cx, expr); - then { - span_lint_and_help( - cx, - REDUNDANT_LOCALS, - local.span, - &format!("redundant redefinition of a binding `{ident}`"), - Some(binding_pat.span), - &format!("`{ident}` is initially defined here"), - ); - } + && !in_external_macro(cx.sess(), local.span) + && !is_from_proc_macro(cx, expr) + { + span_lint_and_help( + cx, + REDUNDANT_LOCALS, + local.span, + &format!("redundant redefinition of a binding `{ident}`"), + Some(binding_pat.span), + &format!("`{ident}` is initially defined here"), + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/redundant_pub_crate.rs b/src/tools/clippy/clippy_lints/src/redundant_pub_crate.rs index 03673eb27..0e43e4a7e 100644 --- a/src/tools/clippy/clippy_lints/src/redundant_pub_crate.rs +++ b/src/tools/clippy/clippy_lints/src/redundant_pub_crate.rs @@ -4,7 +4,7 @@ use rustc_hir::def::{DefKind, Res}; use rustc_hir::{Item, ItemKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::def_id::CRATE_DEF_ID; use rustc_span::hygiene::MacroKind; @@ -45,28 +45,27 @@ impl_lint_pass!(RedundantPubCrate => [REDUNDANT_PUB_CRATE]); impl<'tcx> LateLintPass<'tcx> for RedundantPubCrate { fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx Item<'tcx>) { - if_chain! { - if cx.tcx.visibility(item.owner_id.def_id) == ty::Visibility::Restricted(CRATE_DEF_ID.to_def_id()); - if !cx.effective_visibilities.is_exported(item.owner_id.def_id) && self.is_exported.last() == Some(&false); - if is_not_macro_export(item); - then { - let span = item.span.with_hi(item.ident.span.hi()); - let descr = cx.tcx.def_kind(item.owner_id).descr(item.owner_id.to_def_id()); - span_lint_and_then( - cx, - REDUNDANT_PUB_CRATE, - span, - &format!("pub(crate) {descr} inside private module"), - |diag| { - diag.span_suggestion( - item.vis_span, - "consider using", - "pub".to_string(), - Applicability::MachineApplicable, - ); - }, - ); - } + if cx.tcx.visibility(item.owner_id.def_id) == ty::Visibility::Restricted(CRATE_DEF_ID.to_def_id()) + && !cx.effective_visibilities.is_exported(item.owner_id.def_id) + && self.is_exported.last() == Some(&false) + && is_not_macro_export(item) + { + let span = item.span.with_hi(item.ident.span.hi()); + let descr = cx.tcx.def_kind(item.owner_id).descr(item.owner_id.to_def_id()); + span_lint_and_then( + cx, + REDUNDANT_PUB_CRATE, + span, + &format!("pub(crate) {descr} inside private module"), + |diag| { + diag.span_suggestion( + item.vis_span, + "consider using", + "pub".to_string(), + Applicability::MachineApplicable, + ); + }, + ); } if let ItemKind::Mod { .. } = item.kind { diff --git a/src/tools/clippy/clippy_lints/src/redundant_slicing.rs b/src/tools/clippy/clippy_lints/src/redundant_slicing.rs index 7adbd6791..c99b657c2 100644 --- a/src/tools/clippy/clippy_lints/src/redundant_slicing.rs +++ b/src/tools/clippy/clippy_lints/src/redundant_slicing.rs @@ -2,14 +2,13 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::get_parent_expr; use clippy_utils::source::snippet_with_context; use clippy_utils::ty::{is_type_lang_item, peel_mid_ty_refs}; -use if_chain::if_chain; use rustc_ast::util::parser::PREC_PREFIX; use rustc_errors::Applicability; use rustc_hir::{BorrowKind, Expr, ExprKind, LangItem, Mutability}; use rustc_lint::{LateContext, LateLintPass, Lint}; use rustc_middle::ty::adjustment::{Adjust, AutoBorrow, AutoBorrowMutability}; use rustc_middle::ty::{GenericArg, Ty}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does @@ -78,92 +77,83 @@ impl<'tcx> LateLintPass<'tcx> for RedundantSlicing { } let ctxt = expr.span.ctxt(); - if_chain! { - if let ExprKind::AddrOf(BorrowKind::Ref, mutability, addressee) = expr.kind; - if addressee.span.ctxt() == ctxt; - if let ExprKind::Index(indexed, range, _) = addressee.kind; - if is_type_lang_item(cx, cx.typeck_results().expr_ty_adjusted(range), LangItem::RangeFull); - then { - let (expr_ty, expr_ref_count) = peel_mid_ty_refs(cx.typeck_results().expr_ty(expr)); - let (indexed_ty, indexed_ref_count) = peel_mid_ty_refs(cx.typeck_results().expr_ty(indexed)); - let parent_expr = get_parent_expr(cx, expr); - let needs_parens_for_prefix = parent_expr.map_or(false, |parent| { - parent.precedence().order() > PREC_PREFIX - }); - let mut app = Applicability::MachineApplicable; + if let ExprKind::AddrOf(BorrowKind::Ref, mutability, addressee) = expr.kind + && addressee.span.ctxt() == ctxt + && let ExprKind::Index(indexed, range, _) = addressee.kind + && is_type_lang_item(cx, cx.typeck_results().expr_ty_adjusted(range), LangItem::RangeFull) + { + let (expr_ty, expr_ref_count) = peel_mid_ty_refs(cx.typeck_results().expr_ty(expr)); + let (indexed_ty, indexed_ref_count) = peel_mid_ty_refs(cx.typeck_results().expr_ty(indexed)); + let parent_expr = get_parent_expr(cx, expr); + let needs_parens_for_prefix = parent_expr.map_or(false, |parent| parent.precedence().order() > PREC_PREFIX); + let mut app = Applicability::MachineApplicable; - let ((lint, msg), help, sugg) = if expr_ty == indexed_ty { - if expr_ref_count > indexed_ref_count { - // Indexing takes self by reference and can't return a reference to that - // reference as it's a local variable. The only way this could happen is if - // `self` contains a reference to the `Self` type. If this occurs then the - // lint no longer applies as it's essentially a field access, which is not - // redundant. - return; - } - let deref_count = indexed_ref_count - expr_ref_count; + let ((lint, msg), help, sugg) = if expr_ty == indexed_ty { + if expr_ref_count > indexed_ref_count { + // Indexing takes self by reference and can't return a reference to that + // reference as it's a local variable. The only way this could happen is if + // `self` contains a reference to the `Self` type. If this occurs then the + // lint no longer applies as it's essentially a field access, which is not + // redundant. + return; + } + let deref_count = indexed_ref_count - expr_ref_count; - let (lint, reborrow_str, help_str) = if mutability == Mutability::Mut { - // The slice was used to reborrow the mutable reference. - (DEREF_BY_SLICING_LINT, "&mut *", "reborrow the original value instead") - } else if matches!( - parent_expr, - Some(Expr { - kind: ExprKind::AddrOf(BorrowKind::Ref, Mutability::Mut, _), - .. - }) - ) || cx.typeck_results().expr_adjustments(expr).first().map_or(false, |a| { - matches!(a.kind, Adjust::Borrow(AutoBorrow::Ref(_, AutoBorrowMutability::Mut { .. }))) - }) { - // The slice was used to make a temporary reference. - (DEREF_BY_SLICING_LINT, "&*", "reborrow the original value instead") - } else if deref_count != 0 { - (DEREF_BY_SLICING_LINT, "", "dereference the original value instead") - } else { - (REDUNDANT_SLICING_LINT, "", "use the original value instead") - }; + let (lint, reborrow_str, help_str) = if mutability == Mutability::Mut { + // The slice was used to reborrow the mutable reference. + (DEREF_BY_SLICING_LINT, "&mut *", "reborrow the original value instead") + } else if matches!( + parent_expr, + Some(Expr { + kind: ExprKind::AddrOf(BorrowKind::Ref, Mutability::Mut, _), + .. + }) + ) || cx.typeck_results().expr_adjustments(expr).first().map_or(false, |a| { + matches!( + a.kind, + Adjust::Borrow(AutoBorrow::Ref(_, AutoBorrowMutability::Mut { .. })) + ) + }) { + // The slice was used to make a temporary reference. + (DEREF_BY_SLICING_LINT, "&*", "reborrow the original value instead") + } else if deref_count != 0 { + (DEREF_BY_SLICING_LINT, "", "dereference the original value instead") + } else { + (REDUNDANT_SLICING_LINT, "", "use the original value instead") + }; - let snip = snippet_with_context(cx, indexed.span, ctxt, "..", &mut app).0; - let sugg = if (deref_count != 0 || !reborrow_str.is_empty()) && needs_parens_for_prefix { - format!("({reborrow_str}{}{snip})", "*".repeat(deref_count)) - } else { - format!("{reborrow_str}{}{snip}", "*".repeat(deref_count)) - }; + let snip = snippet_with_context(cx, indexed.span, ctxt, "..", &mut app).0; + let sugg = if (deref_count != 0 || !reborrow_str.is_empty()) && needs_parens_for_prefix { + format!("({reborrow_str}{}{snip})", "*".repeat(deref_count)) + } else { + format!("{reborrow_str}{}{snip}", "*".repeat(deref_count)) + }; - (lint, help_str, sugg) - } else if let Some(target_id) = cx.tcx.lang_items().deref_target() { - if let Ok(deref_ty) = cx.tcx.try_normalize_erasing_regions( - cx.param_env, - Ty::new_projection(cx.tcx,target_id, cx.tcx.mk_args(&[GenericArg::from(indexed_ty)])), - ) { - if deref_ty == expr_ty { - let snip = snippet_with_context(cx, indexed.span, ctxt, "..", &mut app).0; - let sugg = if needs_parens_for_prefix { - format!("(&{}{}*{snip})", mutability.prefix_str(), "*".repeat(indexed_ref_count)) - } else { - format!("&{}{}*{snip}", mutability.prefix_str(), "*".repeat(indexed_ref_count)) - }; - (DEREF_BY_SLICING_LINT, "dereference the original value instead", sugg) + (lint, help_str, sugg) + } else if let Some(target_id) = cx.tcx.lang_items().deref_target() { + if let Ok(deref_ty) = cx.tcx.try_normalize_erasing_regions( + cx.param_env, + Ty::new_projection(cx.tcx, target_id, cx.tcx.mk_args(&[GenericArg::from(indexed_ty)])), + ) { + if deref_ty == expr_ty { + let snip = snippet_with_context(cx, indexed.span, ctxt, "..", &mut app).0; + let sugg = if needs_parens_for_prefix { + format!("(&{}{}*{snip})", mutability.prefix_str(), "*".repeat(indexed_ref_count)) } else { - return; - } + format!("&{}{}*{snip}", mutability.prefix_str(), "*".repeat(indexed_ref_count)) + }; + (DEREF_BY_SLICING_LINT, "dereference the original value instead", sugg) } else { return; } } else { return; - }; + } + } else { + return; + }; - span_lint_and_sugg( - cx, - lint, - expr.span, - msg, - help, - sugg, - app, - ); - } + span_lint_and_sugg(cx, lint, expr.span, msg, help, sugg, app); } } } diff --git a/src/tools/clippy/clippy_lints/src/redundant_static_lifetimes.rs b/src/tools/clippy/clippy_lints/src/redundant_static_lifetimes.rs index a70b831a8..07b604f23 100644 --- a/src/tools/clippy/clippy_lints/src/redundant_static_lifetimes.rs +++ b/src/tools/clippy/clippy_lints/src/redundant_static_lifetimes.rs @@ -4,7 +4,7 @@ use clippy_utils::source::snippet; use rustc_ast::ast::{ConstItem, Item, ItemKind, StaticItem, Ty, TyKind}; use rustc_errors::Applicability; use rustc_lint::{EarlyContext, EarlyLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::symbol::kw; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/redundant_type_annotations.rs b/src/tools/clippy/clippy_lints/src/redundant_type_annotations.rs index f6af9cac3..07fcb69af 100644 --- a/src/tools/clippy/clippy_lints/src/redundant_type_annotations.rs +++ b/src/tools/clippy/clippy_lints/src/redundant_type_annotations.rs @@ -5,7 +5,7 @@ use rustc_hir as hir; use rustc_hir::def::DefKind; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::Ty; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/ref_option_ref.rs b/src/tools/clippy/clippy_lints/src/ref_option_ref.rs index c984a8286..19ce08bde 100644 --- a/src/tools/clippy/clippy_lints/src/ref_option_ref.rs +++ b/src/tools/clippy/clippy_lints/src/ref_option_ref.rs @@ -1,11 +1,10 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::last_path_segment; use clippy_utils::source::snippet; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{GenericArg, GenericArgsParentheses, Mutability, Ty, TyKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::symbol::sym; declare_clippy_lint! { @@ -38,34 +37,30 @@ declare_lint_pass!(RefOptionRef => [REF_OPTION_REF]); impl<'tcx> LateLintPass<'tcx> for RefOptionRef { fn check_ty(&mut self, cx: &LateContext<'tcx>, ty: &'tcx Ty<'tcx>) { - if_chain! { - if let TyKind::Ref(_, ref mut_ty) = ty.kind; - if mut_ty.mutbl == Mutability::Not; - if let TyKind::Path(ref qpath) = &mut_ty.ty.kind; - let last = last_path_segment(qpath); - if let Some(def_id) = last.res.opt_def_id(); - - if cx.tcx.is_diagnostic_item(sym::Option, def_id); - if let Some(params) = last_path_segment(qpath).args ; - if params.parenthesized == GenericArgsParentheses::No; - if let Some(inner_ty) = params.args.iter().find_map(|arg| match arg { + if let TyKind::Ref(_, ref mut_ty) = ty.kind + && mut_ty.mutbl == Mutability::Not + && let TyKind::Path(ref qpath) = &mut_ty.ty.kind + && let last = last_path_segment(qpath) + && let Some(def_id) = last.res.opt_def_id() + && cx.tcx.is_diagnostic_item(sym::Option, def_id) + && let Some(params) = last_path_segment(qpath).args + && params.parenthesized == GenericArgsParentheses::No + && let Some(inner_ty) = params.args.iter().find_map(|arg| match arg { GenericArg::Type(inner_ty) => Some(inner_ty), _ => None, - }); - if let TyKind::Ref(_, ref inner_mut_ty) = inner_ty.kind; - if inner_mut_ty.mutbl == Mutability::Not; - - then { - span_lint_and_sugg( - cx, - REF_OPTION_REF, - ty.span, - "since `&` implements the `Copy` trait, `&Option<&T>` can be simplified to `Option<&T>`", - "try", - format!("Option<{}>", &snippet(cx, inner_ty.span, "..")), - Applicability::MaybeIncorrect, - ); - } + }) + && let TyKind::Ref(_, ref inner_mut_ty) = inner_ty.kind + && inner_mut_ty.mutbl == Mutability::Not + { + span_lint_and_sugg( + cx, + REF_OPTION_REF, + ty.span, + "since `&` implements the `Copy` trait, `&Option<&T>` can be simplified to `Option<&T>`", + "try", + format!("Option<{}>", &snippet(cx, inner_ty.span, "..")), + Applicability::MaybeIncorrect, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/ref_patterns.rs b/src/tools/clippy/clippy_lints/src/ref_patterns.rs index 8b3dabde9..a4be78b31 100644 --- a/src/tools/clippy/clippy_lints/src/ref_patterns.rs +++ b/src/tools/clippy/clippy_lints/src/ref_patterns.rs @@ -1,7 +1,7 @@ use clippy_utils::diagnostics::span_lint_and_help; use rustc_ast::ast::{BindingAnnotation, Pat, PatKind}; use rustc_lint::{EarlyContext, EarlyLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/reference.rs b/src/tools/clippy/clippy_lints/src/reference.rs index 12da29f11..16086ba66 100644 --- a/src/tools/clippy/clippy_lints/src/reference.rs +++ b/src/tools/clippy/clippy_lints/src/reference.rs @@ -1,10 +1,9 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::{snippet_opt, snippet_with_applicability}; -use if_chain::if_chain; use rustc_ast::ast::{Expr, ExprKind, Mutability, UnOp}; use rustc_errors::Applicability; use rustc_lint::{EarlyContext, EarlyLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::BytePos; declare_clippy_lint! { @@ -47,58 +46,62 @@ fn without_parens(mut e: &Expr) -> &Expr { impl EarlyLintPass for DerefAddrOf { fn check_expr(&mut self, cx: &EarlyContext<'_>, e: &Expr) { - if_chain! { - if let ExprKind::Unary(UnOp::Deref, ref deref_target) = e.kind; - if let ExprKind::AddrOf(_, ref mutability, ref addrof_target) = without_parens(deref_target).kind; - if deref_target.span.eq_ctxt(e.span); - if !addrof_target.span.from_expansion(); - then { - let mut applicability = Applicability::MachineApplicable; - let sugg = if e.span.from_expansion() { - if let Some(macro_source) = snippet_opt(cx, e.span) { - // Remove leading whitespace from the given span - // e.g: ` $visitor` turns into `$visitor` - let trim_leading_whitespaces = |span| { - snippet_opt(cx, span).and_then(|snip| { + if let ExprKind::Unary(UnOp::Deref, ref deref_target) = e.kind + && let ExprKind::AddrOf(_, ref mutability, ref addrof_target) = without_parens(deref_target).kind + && deref_target.span.eq_ctxt(e.span) + && !addrof_target.span.from_expansion() + { + let mut applicability = Applicability::MachineApplicable; + let sugg = if e.span.from_expansion() { + if let Some(macro_source) = snippet_opt(cx, e.span) { + // Remove leading whitespace from the given span + // e.g: ` $visitor` turns into `$visitor` + let trim_leading_whitespaces = |span| { + snippet_opt(cx, span) + .and_then(|snip| { #[expect(clippy::cast_possible_truncation)] - snip.find(|c: char| !c.is_whitespace()).map(|pos| { - span.lo() + BytePos(pos as u32) - }) - }).map_or(span, |start_no_whitespace| e.span.with_lo(start_no_whitespace)) - }; - - let mut generate_snippet = |pattern: &str| { - #[expect(clippy::cast_possible_truncation)] - macro_source.rfind(pattern).map(|pattern_pos| { - let rpos = pattern_pos + pattern.len(); - let span_after_ref = e.span.with_lo(BytePos(e.span.lo().0 + rpos as u32)); - let span = trim_leading_whitespaces(span_after_ref); - snippet_with_applicability(cx, span, "_", &mut applicability) + snip.find(|c: char| !c.is_whitespace()) + .map(|pos| span.lo() + BytePos(pos as u32)) }) - }; + .map_or(span, |start_no_whitespace| e.span.with_lo(start_no_whitespace)) + }; + + let mut generate_snippet = |pattern: &str| { + #[expect(clippy::cast_possible_truncation)] + macro_source.rfind(pattern).map(|pattern_pos| { + let rpos = pattern_pos + pattern.len(); + let span_after_ref = e.span.with_lo(BytePos(e.span.lo().0 + rpos as u32)); + let span = trim_leading_whitespaces(span_after_ref); + snippet_with_applicability(cx, span, "_", &mut applicability) + }) + }; - if *mutability == Mutability::Mut { - generate_snippet("mut") - } else { - generate_snippet("&") - } + if *mutability == Mutability::Mut { + generate_snippet("mut") } else { - Some(snippet_with_applicability(cx, e.span, "_", &mut applicability)) + generate_snippet("&") } } else { - Some(snippet_with_applicability(cx, addrof_target.span, "_", &mut applicability)) - }; - if let Some(sugg) = sugg { - span_lint_and_sugg( - cx, - DEREF_ADDROF, - e.span, - "immediately dereferencing a reference", - "try", - sugg.to_string(), - applicability, - ); + Some(snippet_with_applicability(cx, e.span, "_", &mut applicability)) } + } else { + Some(snippet_with_applicability( + cx, + addrof_target.span, + "_", + &mut applicability, + )) + }; + if let Some(sugg) = sugg { + span_lint_and_sugg( + cx, + DEREF_ADDROF, + e.span, + "immediately dereferencing a reference", + "try", + sugg.to_string(), + applicability, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/regex.rs b/src/tools/clippy/clippy_lints/src/regex.rs index cb78eec9e..687bad35a 100644 --- a/src/tools/clippy/clippy_lints/src/regex.rs +++ b/src/tools/clippy/clippy_lints/src/regex.rs @@ -8,7 +8,7 @@ use rustc_ast::ast::{LitKind, StrStyle}; use rustc_hir::def_id::DefIdMap; use rustc_hir::{BorrowKind, Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::{BytePos, Span}; declare_clippy_lint! { @@ -191,13 +191,11 @@ fn is_trivial_regex(s: ®ex_syntax::hir::Hir) -> Option<&'static str> { } fn check_set<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>, utf8: bool) { - if_chain! { - if let ExprKind::AddrOf(BorrowKind::Ref, _, expr) = expr.kind; - if let ExprKind::Array(exprs) = expr.kind; - then { - for expr in exprs { - check_regex(cx, expr, utf8); - } + if let ExprKind::AddrOf(BorrowKind::Ref, _, expr) = expr.kind + && let ExprKind::Array(exprs) = expr.kind + { + for expr in exprs { + check_regex(cx, expr, utf8); } } } diff --git a/src/tools/clippy/clippy_lints/src/renamed_lints.rs b/src/tools/clippy/clippy_lints/src/renamed_lints.rs index 613f1ecc6..85979903b 100644 --- a/src/tools/clippy/clippy_lints/src/renamed_lints.rs +++ b/src/tools/clippy/clippy_lints/src/renamed_lints.rs @@ -4,8 +4,9 @@ pub static RENAMED_LINTS: &[(&str, &str)] = &[ ("clippy::almost_complete_letter_range", "clippy::almost_complete_range"), ("clippy::blacklisted_name", "clippy::disallowed_names"), - ("clippy::block_in_if_condition_expr", "clippy::blocks_in_if_conditions"), - ("clippy::block_in_if_condition_stmt", "clippy::blocks_in_if_conditions"), + ("clippy::block_in_if_condition_expr", "clippy::blocks_in_conditions"), + ("clippy::block_in_if_condition_stmt", "clippy::blocks_in_conditions"), + ("clippy::blocks_in_if_conditions", "clippy::blocks_in_conditions"), ("clippy::box_vec", "clippy::box_collection"), ("clippy::const_static_lifetime", "clippy::redundant_static_lifetimes"), ("clippy::cyclomatic_complexity", "clippy::cognitive_complexity"), @@ -58,4 +59,5 @@ pub static RENAMED_LINTS: &[(&str, &str)] = &[ ("clippy::undropped_manually_drops", "undropped_manually_drops"), ("clippy::unknown_clippy_lints", "unknown_lints"), ("clippy::unused_label", "unused_labels"), + ("clippy::vtable_address_comparisons", "ambiguous_wide_pointer_comparisons"), ]; diff --git a/src/tools/clippy/clippy_lints/src/repeat_vec_with_capacity.rs b/src/tools/clippy/clippy_lints/src/repeat_vec_with_capacity.rs new file mode 100644 index 000000000..5a4933a3f --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/repeat_vec_with_capacity.rs @@ -0,0 +1,114 @@ +use clippy_utils::consts::{constant, Constant}; +use clippy_utils::diagnostics::span_lint_and_then; +use clippy_utils::higher::VecArgs; +use clippy_utils::macros::root_macro_call; +use clippy_utils::source::snippet; +use clippy_utils::{expr_or_init, fn_def_id, match_def_path, paths}; +use rustc_errors::Applicability; +use rustc_hir::{Expr, ExprKind}; +use rustc_lint::{LateContext, LateLintPass}; +use rustc_session::declare_lint_pass; +use rustc_span::{sym, Span}; + +declare_clippy_lint! { + /// ### What it does + /// Looks for patterns such as `vec![Vec::with_capacity(x); n]` or `iter::repeat(Vec::with_capacity(x))`. + /// + /// ### Why is this bad? + /// These constructs work by cloning the element, but cloning a `Vec<_>` does not + /// respect the old vector's capacity and effectively discards it. + /// + /// This makes `iter::repeat(Vec::with_capacity(x))` especially suspicious because the user most certainly + /// expected that the yielded `Vec<_>` will have the requested capacity, otherwise one can simply write + /// `iter::repeat(Vec::new())` instead and it will have the same effect. + /// + /// Similarly for `vec![x; n]`, the element `x` is cloned to fill the vec. + /// Unlike `iter::repeat` however, the vec repeat macro does not have to clone the value `n` times + /// but just `n - 1` times, because it can reuse the passed value for the last slot. + /// That means that the last `Vec<_>` gets the requested capacity but all other ones do not. + /// + /// ### Example + /// ```rust + /// # use std::iter; + /// + /// let _: Vec<Vec<u8>> = vec![Vec::with_capacity(42); 123]; + /// let _: Vec<Vec<u8>> = iter::repeat(Vec::with_capacity(42)).take(123).collect(); + /// ``` + /// Use instead: + /// ```rust + /// # use std::iter; + /// + /// let _: Vec<Vec<u8>> = iter::repeat_with(|| Vec::with_capacity(42)).take(123).collect(); + /// // ^^^ this closure executes 123 times + /// // and the vecs will have the expected capacity + /// ``` + #[clippy::version = "1.74.0"] + pub REPEAT_VEC_WITH_CAPACITY, + suspicious, + "repeating a `Vec::with_capacity` expression which does not retain capacity" +} + +declare_lint_pass!(RepeatVecWithCapacity => [REPEAT_VEC_WITH_CAPACITY]); + +fn emit_lint(cx: &LateContext<'_>, span: Span, kind: &str, note: &'static str, sugg_msg: &'static str, sugg: String) { + span_lint_and_then( + cx, + REPEAT_VEC_WITH_CAPACITY, + span, + &format!("repeating `Vec::with_capacity` using `{kind}`, which does not retain capacity"), + |diag| { + diag.note(note); + diag.span_suggestion_verbose(span, sugg_msg, sugg, Applicability::MaybeIncorrect); + }, + ); +} + +/// Checks `vec![Vec::with_capacity(x); n]` +fn check_vec_macro(cx: &LateContext<'_>, expr: &Expr<'_>) { + if let Some(mac_call) = root_macro_call(expr.span) + && cx.tcx.is_diagnostic_item(sym::vec_macro, mac_call.def_id) + && let Some(VecArgs::Repeat(repeat_expr, len_expr)) = VecArgs::hir(cx, expr) + && fn_def_id(cx, repeat_expr).is_some_and(|did| match_def_path(cx, did, &paths::VEC_WITH_CAPACITY)) + && !len_expr.span.from_expansion() + && let Some(Constant::Int(2..)) = constant(cx, cx.typeck_results(), expr_or_init(cx, len_expr)) + { + emit_lint( + cx, + expr.span.source_callsite(), + "vec![x; n]", + "only the last `Vec` will have the capacity", + "if you intended to initialize multiple `Vec`s with an initial capacity, try", + format!( + "(0..{}).map(|_| {}).collect::<Vec<_>>()", + snippet(cx, len_expr.span, ""), + snippet(cx, repeat_expr.span, "..") + ), + ); + } +} + +/// Checks `iter::repeat(Vec::with_capacity(x))` +fn check_repeat_fn(cx: &LateContext<'_>, expr: &Expr<'_>) { + if !expr.span.from_expansion() + && fn_def_id(cx, expr).is_some_and(|did| cx.tcx.is_diagnostic_item(sym::iter_repeat, did)) + && let ExprKind::Call(_, [repeat_expr]) = expr.kind + && fn_def_id(cx, repeat_expr).is_some_and(|did| match_def_path(cx, did, &paths::VEC_WITH_CAPACITY)) + && !repeat_expr.span.from_expansion() + { + emit_lint( + cx, + expr.span, + "iter::repeat", + "none of the yielded `Vec`s will have the requested capacity", + "if you intended to create an iterator that yields `Vec`s with an initial capacity, try", + format!("std::iter::repeat_with(|| {})", snippet(cx, repeat_expr.span, "..")), + ); + } +} + +impl LateLintPass<'_> for RepeatVecWithCapacity { + fn check_expr(&mut self, cx: &LateContext<'_>, expr: &Expr<'_>) { + check_vec_macro(cx, expr); + check_repeat_fn(cx, expr); + } +} diff --git a/src/tools/clippy/clippy_lints/src/reserve_after_initialization.rs b/src/tools/clippy/clippy_lints/src/reserve_after_initialization.rs index 1975946c6..ca7a0c7c8 100644 --- a/src/tools/clippy/clippy_lints/src/reserve_after_initialization.rs +++ b/src/tools/clippy/clippy_lints/src/reserve_after_initialization.rs @@ -7,7 +7,7 @@ use rustc_hir::def::Res; use rustc_hir::{BindingAnnotation, Block, Expr, ExprKind, HirId, Local, PatKind, QPath, Stmt, StmtKind}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::Span; declare_clippy_lint! { @@ -26,7 +26,7 @@ declare_clippy_lint! { /// ```no_run /// let mut v: Vec<usize> = Vec::with_capacity(10); /// ``` - #[clippy::version = "1.73.0"] + #[clippy::version = "1.74.0"] pub RESERVE_AFTER_INITIALIZATION, complexity, "`reserve` called immediately after `Vec` creation" diff --git a/src/tools/clippy/clippy_lints/src/return_self_not_must_use.rs b/src/tools/clippy/clippy_lints/src/return_self_not_must_use.rs index 245029a06..5962e8be9 100644 --- a/src/tools/clippy/clippy_lints/src/return_self_not_must_use.rs +++ b/src/tools/clippy/clippy_lints/src/return_self_not_must_use.rs @@ -6,7 +6,7 @@ use rustc_hir::intravisit::FnKind; use rustc_hir::{Body, FnDecl, OwnerId, TraitItem, TraitItemKind}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::{sym, Span}; declare_clippy_lint! { @@ -69,35 +69,32 @@ declare_clippy_lint! { declare_lint_pass!(ReturnSelfNotMustUse => [RETURN_SELF_NOT_MUST_USE]); fn check_method(cx: &LateContext<'_>, decl: &FnDecl<'_>, fn_def: LocalDefId, span: Span, owner_id: OwnerId) { - if_chain! { + if !in_external_macro(cx.sess(), span) // If it comes from an external macro, better ignore it. - if !in_external_macro(cx.sess(), span); - if decl.implicit_self.has_implicit_self(); + && decl.implicit_self.has_implicit_self() // We only show this warning for public exported methods. - if cx.effective_visibilities.is_exported(fn_def); + && cx.effective_visibilities.is_exported(fn_def) // We don't want to emit this lint if the `#[must_use]` attribute is already there. - if !cx.tcx.hir().attrs(owner_id.into()).iter().any(|attr| attr.has_name(sym::must_use)); - if cx.tcx.visibility(fn_def.to_def_id()).is_public(); - let ret_ty = return_ty(cx, owner_id); - let self_arg = nth_arg(cx, owner_id, 0); + && !cx.tcx.hir().attrs(owner_id.into()).iter().any(|attr| attr.has_name(sym::must_use)) + && cx.tcx.visibility(fn_def.to_def_id()).is_public() + && let ret_ty = return_ty(cx, owner_id) + && let self_arg = nth_arg(cx, owner_id, 0) // If `Self` has the same type as the returned type, then we want to warn. // // For this check, we don't want to remove the reference on the returned type because if // there is one, we shouldn't emit a warning! - if self_arg.peel_refs() == ret_ty; + && self_arg.peel_refs() == ret_ty // If `Self` is already marked as `#[must_use]`, no need for the attribute here. - if !is_must_use_ty(cx, ret_ty); - - then { - span_lint_and_help( - cx, - RETURN_SELF_NOT_MUST_USE, - span, - "missing `#[must_use]` attribute on a method returning `Self`", - None, - "consider adding the `#[must_use]` attribute to the method or directly to the `Self` type" - ); - } + && !is_must_use_ty(cx, ret_ty) + { + span_lint_and_help( + cx, + RETURN_SELF_NOT_MUST_USE, + span, + "missing `#[must_use]` attribute on a method returning `Self`", + None, + "consider adding the `#[must_use]` attribute to the method or directly to the `Self` type", + ); } } @@ -111,18 +108,15 @@ impl<'tcx> LateLintPass<'tcx> for ReturnSelfNotMustUse { span: Span, fn_def: LocalDefId, ) { - if_chain! { + if matches!(kind, FnKind::Method(_, _)) // We are only interested in methods, not in functions or associated functions. - if matches!(kind, FnKind::Method(_, _)); - if let Some(impl_def) = cx.tcx.impl_of_method(fn_def.to_def_id()); + && let Some(impl_def) = cx.tcx.impl_of_method(fn_def.to_def_id()) // We don't want this method to be te implementation of a trait because the // `#[must_use]` should be put on the trait definition directly. - if cx.tcx.trait_id_of_impl(impl_def).is_none(); - - then { - let hir_id = cx.tcx.hir().local_def_id_to_hir_id(fn_def); - check_method(cx, decl, fn_def, span, hir_id.expect_owner()); - } + && cx.tcx.trait_id_of_impl(impl_def).is_none() + { + let hir_id = cx.tcx.local_def_id_to_hir_id(fn_def); + check_method(cx, decl, fn_def, span, hir_id.expect_owner()); } } diff --git a/src/tools/clippy/clippy_lints/src/returns.rs b/src/tools/clippy/clippy_lints/src/returns.rs index f2a3dc509..2293b53b4 100644 --- a/src/tools/clippy/clippy_lints/src/returns.rs +++ b/src/tools/clippy/clippy_lints/src/returns.rs @@ -2,18 +2,19 @@ use clippy_utils::diagnostics::{span_lint_and_sugg, span_lint_and_then, span_lin use clippy_utils::source::{snippet_opt, snippet_with_context}; use clippy_utils::sugg::has_enclosing_paren; use clippy_utils::visitors::{for_each_expr_with_closures, Descend}; -use clippy_utils::{fn_def_id, is_from_proc_macro, path_to_local_id, span_find_starting_semi}; +use clippy_utils::{fn_def_id, is_from_proc_macro, is_inside_let_else, path_to_local_id, span_find_starting_semi}; use core::ops::ControlFlow; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::intravisit::FnKind; use rustc_hir::{ - Block, Body, Expr, ExprKind, FnDecl, ItemKind, LangItem, MatchSource, OwnerNode, PatKind, QPath, Stmt, StmtKind, + Block, Body, Expr, ExprKind, FnDecl, HirId, ItemKind, LangItem, MatchSource, Node, OwnerNode, PatKind, QPath, Stmt, + StmtKind, }; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; +use rustc_middle::ty::adjustment::Adjust; use rustc_middle::ty::{self, GenericArgKind, Ty}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::def_id::LocalDefId; use rustc_span::{BytePos, Pos, Span}; use std::borrow::Cow; @@ -159,6 +160,22 @@ impl<'tcx> ToString for RetReplacement<'tcx> { declare_lint_pass!(Return => [LET_AND_RETURN, NEEDLESS_RETURN, NEEDLESS_RETURN_WITH_QUESTION_MARK]); +/// Checks if a return statement is "needed" in the middle of a block, or if it can be removed. This +/// is the case when the enclosing block expression is coerced to some other type, which only works +/// because of the never-ness of `return` expressions +fn stmt_needs_never_type(cx: &LateContext<'_>, stmt_hir_id: HirId) -> bool { + cx.tcx + .hir() + .parent_iter(stmt_hir_id) + .find_map(|(_, node)| if let Node::Expr(expr) = node { Some(expr) } else { None }) + .is_some_and(|e| { + cx.typeck_results() + .expr_adjustments(e) + .iter() + .any(|adjust| adjust.target != cx.tcx.types.unit && matches!(adjust.kind, Adjust::NeverToAny)) + }) +} + impl<'tcx> LateLintPass<'tcx> for Return { fn check_stmt(&mut self, cx: &LateContext<'tcx>, stmt: &'tcx Stmt<'_>) { if !in_external_macro(cx.sess(), stmt.span) @@ -170,9 +187,11 @@ impl<'tcx> LateLintPass<'tcx> for Return { && let ItemKind::Fn(_, _, body) = item.kind && let block = cx.tcx.hir().body(body).value && let ExprKind::Block(block, _) = block.kind + && !is_inside_let_else(cx.tcx, expr) && let [.., final_stmt] = block.stmts && final_stmt.hir_id != stmt.hir_id && !is_from_proc_macro(cx, expr) + && !stmt_needs_never_type(cx, stmt.hir_id) { span_lint_and_sugg( cx, @@ -188,50 +207,45 @@ impl<'tcx> LateLintPass<'tcx> for Return { fn check_block(&mut self, cx: &LateContext<'tcx>, block: &'tcx Block<'_>) { // we need both a let-binding stmt and an expr - if_chain! { - if let Some(retexpr) = block.expr; - if let Some(stmt) = block.stmts.iter().last(); - if let StmtKind::Local(local) = &stmt.kind; - if local.ty.is_none(); - if cx.tcx.hir().attrs(local.hir_id).is_empty(); - if let Some(initexpr) = &local.init; - if let PatKind::Binding(_, local_id, _, _) = local.pat.kind; - if path_to_local_id(retexpr, local_id); - if !last_statement_borrows(cx, initexpr); - if !in_external_macro(cx.sess(), initexpr.span); - if !in_external_macro(cx.sess(), retexpr.span); - if !local.span.from_expansion(); - then { - span_lint_hir_and_then( - cx, - LET_AND_RETURN, - retexpr.hir_id, - retexpr.span, - "returning the result of a `let` binding from a block", - |err| { - err.span_label(local.span, "unnecessary `let` binding"); + if let Some(retexpr) = block.expr + && let Some(stmt) = block.stmts.iter().last() + && let StmtKind::Local(local) = &stmt.kind + && local.ty.is_none() + && cx.tcx.hir().attrs(local.hir_id).is_empty() + && let Some(initexpr) = &local.init + && let PatKind::Binding(_, local_id, _, _) = local.pat.kind + && path_to_local_id(retexpr, local_id) + && !last_statement_borrows(cx, initexpr) + && !in_external_macro(cx.sess(), initexpr.span) + && !in_external_macro(cx.sess(), retexpr.span) + && !local.span.from_expansion() + { + span_lint_hir_and_then( + cx, + LET_AND_RETURN, + retexpr.hir_id, + retexpr.span, + "returning the result of a `let` binding from a block", + |err| { + err.span_label(local.span, "unnecessary `let` binding"); - if let Some(mut snippet) = snippet_opt(cx, initexpr.span) { - if !cx.typeck_results().expr_adjustments(retexpr).is_empty() { - if !has_enclosing_paren(&snippet) { - snippet = format!("({snippet})"); - } - snippet.push_str(" as _"); + if let Some(mut snippet) = snippet_opt(cx, initexpr.span) { + if !cx.typeck_results().expr_adjustments(retexpr).is_empty() { + if !has_enclosing_paren(&snippet) { + snippet = format!("({snippet})"); } - err.multipart_suggestion( - "return the expression directly", - vec![ - (local.span, String::new()), - (retexpr.span, snippet), - ], - Applicability::MachineApplicable, - ); - } else { - err.span_help(initexpr.span, "this expression can be directly returned"); + snippet.push_str(" as _"); } - }, - ); - } + err.multipart_suggestion( + "return the expression directly", + vec![(local.span, String::new()), (retexpr.span, snippet)], + Applicability::MachineApplicable, + ); + } else { + err.span_help(initexpr.span, "this expression can be directly returned"); + } + }, + ); } } @@ -314,7 +328,7 @@ fn check_final_expr<'tcx>( let replacement = if let Some(inner_expr) = inner { // if desugar of `do yeet`, don't lint if let ExprKind::Call(path_expr, _) = inner_expr.kind - && let ExprKind::Path(QPath::LangItem(LangItem::TryTraitFromYeet, _, _)) = path_expr.kind + && let ExprKind::Path(QPath::LangItem(LangItem::TryTraitFromYeet, ..)) = path_expr.kind { return; } diff --git a/src/tools/clippy/clippy_lints/src/same_name_method.rs b/src/tools/clippy/clippy_lints/src/same_name_method.rs index fd1f3d390..7a351dab2 100644 --- a/src/tools/clippy/clippy_lints/src/same_name_method.rs +++ b/src/tools/clippy/clippy_lints/src/same_name_method.rs @@ -4,7 +4,7 @@ use rustc_hir::def::{DefKind, Res}; use rustc_hir::{HirId, Impl, ItemKind, Node, Path, QPath, TraitRef, TyKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::AssocKind; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::symbol::Symbol; use rustc_span::Span; use std::collections::{BTreeMap, BTreeSet}; @@ -55,11 +55,11 @@ impl<'tcx> LateLintPass<'tcx> for SameNameMethod { if matches!(cx.tcx.def_kind(id.owner_id), DefKind::Impl { .. }) && let item = cx.tcx.hir().item(id) && let ItemKind::Impl(Impl { - items, - of_trait, - self_ty, - .. - }) = &item.kind + items, + of_trait, + self_ty, + .. + }) = &item.kind && let TyKind::Path(QPath::Resolved(_, Path { res, .. })) = self_ty.kind { if !map.contains_key(res) { @@ -75,11 +75,11 @@ impl<'tcx> LateLintPass<'tcx> for SameNameMethod { match of_trait { Some(trait_ref) => { - let mut methods_in_trait: BTreeSet<Symbol> = if_chain! { + let mut methods_in_trait: BTreeSet<Symbol> = if let Some(Node::TraitRef(TraitRef { path, .. })) = - cx.tcx.hir().find(trait_ref.hir_ref_id); - if let Res::Def(DefKind::Trait, did) = path.res; - then{ + cx.tcx.opt_hir_node(trait_ref.hir_ref_id) + && let Res::Def(DefKind::Trait, did) = path.res + { // FIXME: if // `rustc_middle::ty::assoc::AssocItems::items` is public, // we can iterate its keys instead of `in_definition_order`, @@ -87,15 +87,12 @@ impl<'tcx> LateLintPass<'tcx> for SameNameMethod { cx.tcx .associated_items(did) .in_definition_order() - .filter(|assoc_item| { - matches!(assoc_item.kind, AssocKind::Fn) - }) + .filter(|assoc_item| matches!(assoc_item.kind, AssocKind::Fn)) .map(|assoc_item| assoc_item.name) .collect() - }else{ + } else { BTreeSet::new() - } - }; + }; let mut check_trait_method = |method_name: Symbol, trait_method_span: Span| { if let Some((impl_span, hir_id)) = existing_name.impl_methods.get(&method_name) { diff --git a/src/tools/clippy/clippy_lints/src/self_named_constructors.rs b/src/tools/clippy/clippy_lints/src/self_named_constructors.rs index b92014f68..98f3235af 100644 --- a/src/tools/clippy/clippy_lints/src/self_named_constructors.rs +++ b/src/tools/clippy/clippy_lints/src/self_named_constructors.rs @@ -3,7 +3,7 @@ use clippy_utils::return_ty; use clippy_utils::ty::contains_adt_constructor; use rustc_hir::{Impl, ImplItem, ImplItemKind, ItemKind, Node}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does @@ -70,22 +70,20 @@ impl<'tcx> LateLintPass<'tcx> for SelfNamedConstructors { return; } - if_chain! { - if let Some(self_def) = self_ty.ty_adt_def(); - if let Some(self_local_did) = self_def.did().as_local(); - let self_id = cx.tcx.hir().local_def_id_to_hir_id(self_local_did); - if let Some(Node::Item(x)) = cx.tcx.hir().find(self_id); - let type_name = x.ident.name.as_str().to_lowercase(); - if impl_item.ident.name.as_str() == type_name || impl_item.ident.name.as_str().replace('_', "") == type_name; - - then { - span_lint( - cx, - SELF_NAMED_CONSTRUCTORS, - impl_item.span, - &format!("constructor `{}` has the same name as the type", impl_item.ident.name), - ); - } + if let Some(self_def) = self_ty.ty_adt_def() + && let Some(self_local_did) = self_def.did().as_local() + && let self_id = cx.tcx.local_def_id_to_hir_id(self_local_did) + && let Some(Node::Item(x)) = cx.tcx.opt_hir_node(self_id) + && let type_name = x.ident.name.as_str().to_lowercase() + && (impl_item.ident.name.as_str() == type_name + || impl_item.ident.name.as_str().replace('_', "") == type_name) + { + span_lint( + cx, + SELF_NAMED_CONSTRUCTORS, + impl_item.span, + &format!("constructor `{}` has the same name as the type", impl_item.ident.name), + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/semicolon_block.rs b/src/tools/clippy/clippy_lints/src/semicolon_block.rs index b0601bba4..0b3adfb7a 100644 --- a/src/tools/clippy/clippy_lints/src/semicolon_block.rs +++ b/src/tools/clippy/clippy_lints/src/semicolon_block.rs @@ -2,7 +2,7 @@ use clippy_utils::diagnostics::{multispan_sugg_with_applicability, span_lint_and use rustc_errors::Applicability; use rustc_hir::{Block, Expr, ExprKind, Stmt, StmtKind}; use rustc_lint::{LateContext, LateLintPass, LintContext}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::Span; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/semicolon_if_nothing_returned.rs b/src/tools/clippy/clippy_lints/src/semicolon_if_nothing_returned.rs index ccf8b9977..2cd3e57f8 100644 --- a/src/tools/clippy/clippy_lints/src/semicolon_if_nothing_returned.rs +++ b/src/tools/clippy/clippy_lints/src/semicolon_if_nothing_returned.rs @@ -1,11 +1,10 @@ use crate::rustc_lint::LintContext; use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet_with_context; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{Block, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does @@ -38,30 +37,29 @@ declare_lint_pass!(SemicolonIfNothingReturned => [SEMICOLON_IF_NOTHING_RETURNED] impl<'tcx> LateLintPass<'tcx> for SemicolonIfNothingReturned { fn check_block(&mut self, cx: &LateContext<'tcx>, block: &'tcx Block<'tcx>) { - if_chain! { - if !block.span.from_expansion(); - if let Some(expr) = block.expr; - let t_expr = cx.typeck_results().expr_ty(expr); - if t_expr.is_unit(); - let mut app = Applicability::MachineApplicable; - if let snippet = snippet_with_context(cx, expr.span, block.span.ctxt(), "}", &mut app).0; - if !snippet.ends_with('}') && !snippet.ends_with(';'); - if cx.sess().source_map().is_multiline(block.span); - then { - // filter out the desugared `for` loop - if let ExprKind::DropTemps(..) = &expr.kind { - return; - } - span_lint_and_sugg( - cx, - SEMICOLON_IF_NOTHING_RETURNED, - expr.span.source_callsite(), - "consider adding a `;` to the last statement for consistent formatting", - "add a `;` here", - format!("{snippet};"), - app, - ); + if !block.span.from_expansion() + && let Some(expr) = block.expr + && let t_expr = cx.typeck_results().expr_ty(expr) + && t_expr.is_unit() + && let mut app = Applicability::MachineApplicable + && let snippet = snippet_with_context(cx, expr.span, block.span.ctxt(), "}", &mut app).0 + && !snippet.ends_with('}') + && !snippet.ends_with(';') + && cx.sess().source_map().is_multiline(block.span) + { + // filter out the desugared `for` loop + if let ExprKind::DropTemps(..) = &expr.kind { + return; } + span_lint_and_sugg( + cx, + SEMICOLON_IF_NOTHING_RETURNED, + expr.span.source_callsite(), + "consider adding a `;` to the last statement for consistent formatting", + "add a `;` here", + format!("{snippet};"), + app, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/serde_api.rs b/src/tools/clippy/clippy_lints/src/serde_api.rs index fc1c2af92..90834d784 100644 --- a/src/tools/clippy/clippy_lints/src/serde_api.rs +++ b/src/tools/clippy/clippy_lints/src/serde_api.rs @@ -2,7 +2,7 @@ use clippy_utils::diagnostics::span_lint; use clippy_utils::{get_trait_def_id, paths}; use rustc_hir::{Impl, Item, ItemKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/shadow.rs b/src/tools/clippy/clippy_lints/src/shadow.rs index 41c10b34a..c74364d89 100644 --- a/src/tools/clippy/clippy_lints/src/shadow.rs +++ b/src/tools/clippy/clippy_lints/src/shadow.rs @@ -7,7 +7,7 @@ use rustc_hir::def_id::LocalDefId; use rustc_hir::hir_id::ItemLocalId; use rustc_hir::{Block, Body, BodyOwnerKind, Expr, ExprKind, HirId, Let, Node, Pat, PatKind, QPath, UnOp}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::{Span, Symbol}; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/significant_drop_tightening.rs b/src/tools/clippy/clippy_lints/src/significant_drop_tightening.rs index 57bcee1a8..6c99ccda7 100644 --- a/src/tools/clippy/clippy_lints/src/significant_drop_tightening.rs +++ b/src/tools/clippy/clippy_lints/src/significant_drop_tightening.rs @@ -8,7 +8,7 @@ use rustc_hir::intravisit::{walk_expr, Visitor}; use rustc_hir::{self as hir}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::ty::{GenericArgKind, Ty, TypeAndMut}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::symbol::Ident; use rustc_span::{sym, Span, DUMMY_SP}; use std::borrow::Cow; diff --git a/src/tools/clippy/clippy_lints/src/single_call_fn.rs b/src/tools/clippy/clippy_lints/src/single_call_fn.rs index 0492df68d..8e181c3cc 100644 --- a/src/tools/clippy/clippy_lints/src/single_call_fn.rs +++ b/src/tools/clippy/clippy_lints/src/single_call_fn.rs @@ -7,7 +7,7 @@ use rustc_hir::{Body, Expr, ExprKind, FnDecl}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::hir::nested_filter::OnlyBodies; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::Span; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/single_char_lifetime_names.rs b/src/tools/clippy/clippy_lints/src/single_char_lifetime_names.rs index 74ee8ce2d..42f1564db 100644 --- a/src/tools/clippy/clippy_lints/src/single_char_lifetime_names.rs +++ b/src/tools/clippy/clippy_lints/src/single_char_lifetime_names.rs @@ -2,7 +2,7 @@ use clippy_utils::diagnostics::span_lint_and_help; use rustc_ast::ast::{GenericParam, GenericParamKind}; use rustc_lint::{EarlyContext, EarlyLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/single_component_path_imports.rs b/src/tools/clippy/clippy_lints/src/single_component_path_imports.rs index 9c21d70c8..18fbbdb40 100644 --- a/src/tools/clippy/clippy_lints/src/single_component_path_imports.rs +++ b/src/tools/clippy/clippy_lints/src/single_component_path_imports.rs @@ -5,7 +5,7 @@ use rustc_ast::visit::{walk_expr, Visitor}; use rustc_ast::{Crate, Expr, ExprKind, Item, ItemKind, MacroDef, ModKind, Ty, TyKind, UseTreeKind}; use rustc_errors::Applicability; use rustc_lint::{EarlyContext, EarlyLintPass, LintContext}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::edition::Edition; use rustc_span::symbol::kw; use rustc_span::{Span, Symbol}; diff --git a/src/tools/clippy/clippy_lints/src/single_range_in_vec_init.rs b/src/tools/clippy/clippy_lints/src/single_range_in_vec_init.rs index 099743d22..95b4a11a7 100644 --- a/src/tools/clippy/clippy_lints/src/single_range_in_vec_init.rs +++ b/src/tools/clippy/clippy_lints/src/single_range_in_vec_init.rs @@ -8,7 +8,7 @@ use rustc_ast::{LitIntType, LitKind, UintTy}; use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind, LangItem, QPath}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use std::fmt::{self, Display, Formatter}; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/size_of_in_element_count.rs b/src/tools/clippy/clippy_lints/src/size_of_in_element_count.rs index b940cac60..756e47cbd 100644 --- a/src/tools/clippy/clippy_lints/src/size_of_in_element_count.rs +++ b/src/tools/clippy/clippy_lints/src/size_of_in_element_count.rs @@ -2,11 +2,10 @@ //! expecting a count of T use clippy_utils::diagnostics::span_lint_and_help; -use if_chain::if_chain; use rustc_hir::{BinOpKind, Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::{self, Ty, TypeAndMut}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { @@ -39,16 +38,17 @@ declare_lint_pass!(SizeOfInElementCount => [SIZE_OF_IN_ELEMENT_COUNT]); fn get_size_of_ty<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>, inverted: bool) -> Option<Ty<'tcx>> { match expr.kind { ExprKind::Call(count_func, _func_args) => { - if_chain! { - if !inverted; - if let ExprKind::Path(ref count_func_qpath) = count_func.kind; - if let Some(def_id) = cx.qpath_res(count_func_qpath, count_func.hir_id).opt_def_id(); - if matches!(cx.tcx.get_diagnostic_name(def_id), Some(sym::mem_size_of | sym::mem_size_of_val)); - then { - cx.typeck_results().node_args(count_func.hir_id).types().next() - } else { - None - } + if !inverted + && let ExprKind::Path(ref count_func_qpath) = count_func.kind + && let Some(def_id) = cx.qpath_res(count_func_qpath, count_func.hir_id).opt_def_id() + && matches!( + cx.tcx.get_diagnostic_name(def_id), + Some(sym::mem_size_of | sym::mem_size_of_val) + ) + { + cx.typeck_results().node_args(count_func.hir_id).types().next() + } else { + None } }, ExprKind::Binary(op, left, right) if BinOpKind::Mul == op.node => { @@ -80,13 +80,12 @@ fn get_pointee_ty_and_count_expr<'tcx>( "wrapping_offset", ]; - if_chain! { + if let ExprKind::Call(func, [.., count]) = expr.kind // Find calls to ptr::{copy, copy_nonoverlapping} // and ptr::{swap_nonoverlapping, write_bytes}, - if let ExprKind::Call(func, [.., count]) = expr.kind; - if let ExprKind::Path(ref func_qpath) = func.kind; - if let Some(def_id) = cx.qpath_res(func_qpath, func.hir_id).opt_def_id(); - if matches!(cx.tcx.get_diagnostic_name(def_id), Some( + && let ExprKind::Path(ref func_qpath) = func.kind + && let Some(def_id) = cx.qpath_res(func_qpath, func.hir_id).opt_def_id() + && matches!(cx.tcx.get_diagnostic_name(def_id), Some( sym::ptr_copy | sym::ptr_copy_nonoverlapping | sym::ptr_slice_from_raw_parts @@ -95,26 +94,23 @@ fn get_pointee_ty_and_count_expr<'tcx>( | sym::ptr_write_bytes | sym::slice_from_raw_parts | sym::slice_from_raw_parts_mut - )); + )) // Get the pointee type - if let Some(pointee_ty) = cx.typeck_results().node_args(func.hir_id).types().next(); - then { - return Some((pointee_ty, count)); - } + && let Some(pointee_ty) = cx.typeck_results().node_args(func.hir_id).types().next() + { + return Some((pointee_ty, count)); }; - if_chain! { + if let ExprKind::MethodCall(method_path, ptr_self, [.., count], _) = expr.kind // Find calls to copy_{from,to}{,_nonoverlapping} and write_bytes methods - if let ExprKind::MethodCall(method_path, ptr_self, [.., count], _) = expr.kind; - let method_ident = method_path.ident.as_str(); - if METHODS.iter().any(|m| *m == method_ident); + && let method_ident = method_path.ident.as_str() + && METHODS.iter().any(|m| *m == method_ident) // Get the pointee type - if let ty::RawPtr(TypeAndMut { ty: pointee_ty, .. }) = - cx.typeck_results().expr_ty(ptr_self).kind(); - then { - return Some((*pointee_ty, count)); - } + && let ty::RawPtr(TypeAndMut { ty: pointee_ty, .. }) = + cx.typeck_results().expr_ty(ptr_self).kind() + { + return Some((*pointee_ty, count)); }; None } @@ -127,25 +123,16 @@ impl<'tcx> LateLintPass<'tcx> for SizeOfInElementCount { const LINT_MSG: &str = "found a count of bytes \ instead of a count of elements of `T`"; - if_chain! { + if let Some((pointee_ty, count_expr)) = get_pointee_ty_and_count_expr(cx, expr) // Find calls to functions with an element count parameter and get // the pointee type and count parameter expression - if let Some((pointee_ty, count_expr)) = get_pointee_ty_and_count_expr(cx, expr); // Find a size_of call in the count parameter expression and // check that it's the same type - if let Some(ty_used_for_size_of) = get_size_of_ty(cx, count_expr, false); - if pointee_ty == ty_used_for_size_of; - then { - span_lint_and_help( - cx, - SIZE_OF_IN_ELEMENT_COUNT, - count_expr.span, - LINT_MSG, - None, - HELP_MSG - ); - } + && let Some(ty_used_for_size_of) = get_size_of_ty(cx, count_expr, false) + && pointee_ty == ty_used_for_size_of + { + span_lint_and_help(cx, SIZE_OF_IN_ELEMENT_COUNT, count_expr.span, LINT_MSG, None, HELP_MSG); }; } } diff --git a/src/tools/clippy/clippy_lints/src/size_of_ref.rs b/src/tools/clippy/clippy_lints/src/size_of_ref.rs index 7de029b7b..14ca7a3f0 100644 --- a/src/tools/clippy/clippy_lints/src/size_of_ref.rs +++ b/src/tools/clippy/clippy_lints/src/size_of_ref.rs @@ -3,7 +3,7 @@ use clippy_utils::path_def_id; use clippy_utils::ty::peel_mid_ty_refs; use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/slow_vector_initialization.rs b/src/tools/clippy/clippy_lints/src/slow_vector_initialization.rs index 2244eab96..c4a5e48e8 100644 --- a/src/tools/clippy/clippy_lints/src/slow_vector_initialization.rs +++ b/src/tools/clippy/clippy_lints/src/slow_vector_initialization.rs @@ -5,12 +5,11 @@ use clippy_utils::{ get_enclosing_block, is_expr_path_def_path, is_integer_literal, is_path_diagnostic_item, path_to_local, path_to_local_id, paths, SpanlessEq, }; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::intravisit::{walk_block, walk_expr, walk_stmt, Visitor}; use rustc_hir::{BindingAnnotation, Block, Expr, ExprKind, HirId, PatKind, Stmt, StmtKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::symbol::sym; declare_clippy_lint! { @@ -103,41 +102,35 @@ enum InitializationType<'tcx> { impl<'tcx> LateLintPass<'tcx> for SlowVectorInit { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) { // Matches initialization on reassignments. For example: `vec = Vec::with_capacity(100)` - if_chain! { - if let ExprKind::Assign(left, right, _) = expr.kind; - if let Some(local_id) = path_to_local(left); - if let Some(size_expr) = Self::as_vec_initializer(cx, right); - - then { - let vi = VecAllocation { - local_id, - allocation_expr: right, - size_expr, - }; - - Self::search_initialization(cx, vi, expr.hir_id); - } + if let ExprKind::Assign(left, right, _) = expr.kind + && let Some(local_id) = path_to_local(left) + && let Some(size_expr) = Self::as_vec_initializer(cx, right) + { + let vi = VecAllocation { + local_id, + allocation_expr: right, + size_expr, + }; + + Self::search_initialization(cx, vi, expr.hir_id); } } fn check_stmt(&mut self, cx: &LateContext<'tcx>, stmt: &'tcx Stmt<'_>) { // Matches statements which initializes vectors. For example: `let mut vec = Vec::with_capacity(10)` // or `Vec::new()` - if_chain! { - if let StmtKind::Local(local) = stmt.kind; - if let PatKind::Binding(BindingAnnotation::MUT, local_id, _, None) = local.pat.kind; - if let Some(init) = local.init; - if let Some(size_expr) = Self::as_vec_initializer(cx, init); - - then { - let vi = VecAllocation { - local_id, - allocation_expr: init, - size_expr, - }; - - Self::search_initialization(cx, vi, stmt.hir_id); - } + if let StmtKind::Local(local) = stmt.kind + && let PatKind::Binding(BindingAnnotation::MUT, local_id, _, None) = local.pat.kind + && let Some(init) = local.init + && let Some(size_expr) = Self::as_vec_initializer(cx, init) + { + let vi = VecAllocation { + local_id, + allocation_expr: init, + size_expr, + }; + + Self::search_initialization(cx, vi, stmt.hir_id); } } } @@ -242,16 +235,13 @@ struct VectorInitializationVisitor<'a, 'tcx> { impl<'a, 'tcx> VectorInitializationVisitor<'a, 'tcx> { /// Checks if the given expression is extending a vector with `repeat(0).take(..)` fn search_slow_extend_filling(&mut self, expr: &'tcx Expr<'_>) { - if_chain! { - if self.initialization_found; - if let ExprKind::MethodCall(path, self_arg, [extend_arg], _) = expr.kind; - if path_to_local_id(self_arg, self.vec_alloc.local_id); - if path.ident.name == sym!(extend); - if self.is_repeat_take(extend_arg); - - then { - self.slow_expression = Some(InitializationType::Extend(expr)); - } + if self.initialization_found + && let ExprKind::MethodCall(path, self_arg, [extend_arg], _) = expr.kind + && path_to_local_id(self_arg, self.vec_alloc.local_id) + && path.ident.name == sym!(extend) + && self.is_repeat_take(extend_arg) + { + self.slow_expression = Some(InitializationType::Extend(expr)); } } @@ -281,21 +271,19 @@ impl<'a, 'tcx> VectorInitializationVisitor<'a, 'tcx> { /// Returns `true` if give expression is `repeat(0).take(...)` fn is_repeat_take(&mut self, expr: &'tcx Expr<'tcx>) -> bool { - if_chain! { - if let ExprKind::MethodCall(take_path, recv, [len_arg, ..], _) = expr.kind; - if take_path.ident.name == sym!(take); + if let ExprKind::MethodCall(take_path, recv, [len_arg, ..], _) = expr.kind + && take_path.ident.name == sym!(take) // Check that take is applied to `repeat(0)` - if self.is_repeat_zero(recv); - then { - if let InitializedSize::Initialized(size_expr) = self.vec_alloc.size_expr { - // Check that len expression is equals to `with_capacity` expression - return SpanlessEq::new(self.cx).eq_expr(len_arg, size_expr) - || matches!(len_arg.kind, ExprKind::MethodCall(path, ..) if path.ident.as_str() == "capacity") - } - - self.vec_alloc.size_expr = InitializedSize::Initialized(len_arg); - return true; + && self.is_repeat_zero(recv) + { + if let InitializedSize::Initialized(size_expr) = self.vec_alloc.size_expr { + // Check that len expression is equals to `with_capacity` expression + return SpanlessEq::new(self.cx).eq_expr(len_arg, size_expr) + || matches!(len_arg.kind, ExprKind::MethodCall(path, ..) if path.ident.as_str() == "capacity"); } + + self.vec_alloc.size_expr = InitializedSize::Initialized(len_arg); + return true; } false @@ -303,15 +291,13 @@ impl<'a, 'tcx> VectorInitializationVisitor<'a, 'tcx> { /// Returns `true` if given expression is `repeat(0)` fn is_repeat_zero(&self, expr: &Expr<'_>) -> bool { - if_chain! { - if let ExprKind::Call(fn_expr, [repeat_arg]) = expr.kind; - if is_path_diagnostic_item(self.cx, fn_expr, sym::iter_repeat); - if is_integer_literal(repeat_arg, 0); - then { - true - } else { - false - } + if let ExprKind::Call(fn_expr, [repeat_arg]) = expr.kind + && is_path_diagnostic_item(self.cx, fn_expr, sym::iter_repeat) + && is_integer_literal(repeat_arg, 0) + { + true + } else { + false } } } diff --git a/src/tools/clippy/clippy_lints/src/std_instead_of_core.rs b/src/tools/clippy/clippy_lints/src/std_instead_of_core.rs index d07a44770..38fd54a0f 100644 --- a/src/tools/clippy/clippy_lints/src/std_instead_of_core.rs +++ b/src/tools/clippy/clippy_lints/src/std_instead_of_core.rs @@ -6,7 +6,7 @@ use rustc_hir::def_id::DefId; use rustc_hir::{HirId, Path, PathSegment}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::symbol::kw; use rustc_span::{sym, Span}; diff --git a/src/tools/clippy/clippy_lints/src/strings.rs b/src/tools/clippy/clippy_lints/src/strings.rs index a44adc938..13ae1ff52 100644 --- a/src/tools/clippy/clippy_lints/src/strings.rs +++ b/src/tools/clippy/clippy_lints/src/strings.rs @@ -5,14 +5,13 @@ use clippy_utils::{ get_expr_use_or_unification_node, get_parent_expr, is_lint_allowed, is_path_diagnostic_item, method_calls, peel_blocks, SpanlessEq, }; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::def_id::DefId; use rustc_hir::{BinOpKind, BorrowKind, Expr, ExprKind, LangItem, Node, QPath}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; use rustc_middle::ty; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::source_map::Spanned; use rustc_span::sym; @@ -251,128 +250,115 @@ const MAX_LENGTH_BYTE_STRING_LIT: usize = 32; declare_lint_pass!(StringLitAsBytes => [STRING_LIT_AS_BYTES, STRING_FROM_UTF8_AS_BYTES]); impl<'tcx> LateLintPass<'tcx> for StringLitAsBytes { - #[expect(clippy::too_many_lines)] fn check_expr(&mut self, cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) { use rustc_ast::LitKind; - if_chain! { + if let ExprKind::Call(fun, args) = e.kind // Find std::str::converts::from_utf8 - if let ExprKind::Call(fun, args) = e.kind; - if is_path_diagnostic_item(cx, fun, sym::str_from_utf8); + && is_path_diagnostic_item(cx, fun, sym::str_from_utf8) // Find string::as_bytes - if let ExprKind::AddrOf(BorrowKind::Ref, _, args) = args[0].kind; - if let ExprKind::Index(left, right, _) = args.kind; - let (method_names, expressions, _) = method_calls(left, 1); - if method_names.len() == 1; - if expressions.len() == 1; - if expressions[0].1.is_empty(); - if method_names[0] == sym!(as_bytes); + && let ExprKind::AddrOf(BorrowKind::Ref, _, args) = args[0].kind + && let ExprKind::Index(left, right, _) = args.kind + && let (method_names, expressions, _) = method_calls(left, 1) + && method_names.len() == 1 + && expressions.len() == 1 + && expressions[0].1.is_empty() + && method_names[0] == sym!(as_bytes) // Check for slicer - if let ExprKind::Struct(QPath::LangItem(LangItem::Range, ..), _, _) = right.kind; + && let ExprKind::Struct(QPath::LangItem(LangItem::Range, ..), _, _) = right.kind + { + let mut applicability = Applicability::MachineApplicable; + let string_expression = &expressions[0].0; - then { - let mut applicability = Applicability::MachineApplicable; - let string_expression = &expressions[0].0; + let snippet_app = snippet_with_applicability(cx, string_expression.span, "..", &mut applicability); - let snippet_app = snippet_with_applicability( - cx, - string_expression.span, "..", - &mut applicability, - ); + span_lint_and_sugg( + cx, + STRING_FROM_UTF8_AS_BYTES, + e.span, + "calling a slice of `as_bytes()` with `from_utf8` should be not necessary", + "try", + format!("Some(&{snippet_app}[{}])", snippet(cx, right.span, "..")), + applicability, + ); + } + if !in_external_macro(cx.sess(), e.span) + && let ExprKind::MethodCall(path, receiver, ..) = &e.kind + && path.ident.name == sym!(as_bytes) + && let ExprKind::Lit(lit) = &receiver.kind + && let LitKind::Str(lit_content, _) = &lit.node + { + let callsite = snippet(cx, receiver.span.source_callsite(), r#""foo""#); + let mut applicability = Applicability::MachineApplicable; + if callsite.starts_with("include_str!") { span_lint_and_sugg( cx, - STRING_FROM_UTF8_AS_BYTES, + STRING_LIT_AS_BYTES, e.span, - "calling a slice of `as_bytes()` with `from_utf8` should be not necessary", - "try", - format!("Some(&{snippet_app}[{}])", snippet(cx, right.span, "..")), - applicability - ) - } - } - - if_chain! { - if !in_external_macro(cx.sess(), e.span); - if let ExprKind::MethodCall(path, receiver, ..) = &e.kind; - if path.ident.name == sym!(as_bytes); - if let ExprKind::Lit(lit) = &receiver.kind; - if let LitKind::Str(lit_content, _) = &lit.node; - then { - let callsite = snippet(cx, receiver.span.source_callsite(), r#""foo""#); - let mut applicability = Applicability::MachineApplicable; - if callsite.starts_with("include_str!") { + "calling `as_bytes()` on `include_str!(..)`", + "consider using `include_bytes!(..)` instead", + snippet_with_applicability(cx, receiver.span, r#""foo""#, &mut applicability).replacen( + "include_str", + "include_bytes", + 1, + ), + applicability, + ); + } else if lit_content.as_str().is_ascii() + && lit_content.as_str().len() <= MAX_LENGTH_BYTE_STRING_LIT + && !receiver.span.from_expansion() + { + if let Some((parent, id)) = get_expr_use_or_unification_node(cx.tcx, e) + && let Node::Expr(parent) = parent + && let ExprKind::Match(scrutinee, ..) = parent.kind + && scrutinee.hir_id == id + { + // Don't lint. Byte strings produce `&[u8; N]` whereas `as_bytes()` produces + // `&[u8]`. This change would prevent matching with different sized slices. + } else if !callsite.starts_with("env!") { span_lint_and_sugg( cx, STRING_LIT_AS_BYTES, e.span, - "calling `as_bytes()` on `include_str!(..)`", - "consider using `include_bytes!(..)` instead", - snippet_with_applicability(cx, receiver.span, r#""foo""#, &mut applicability).replacen( - "include_str", - "include_bytes", - 1, + "calling `as_bytes()` on a string literal", + "consider using a byte string literal instead", + format!( + "b{}", + snippet_with_applicability(cx, receiver.span, r#""foo""#, &mut applicability) ), applicability, ); - } else if lit_content.as_str().is_ascii() - && lit_content.as_str().len() <= MAX_LENGTH_BYTE_STRING_LIT - && !receiver.span.from_expansion() - { - if let Some((parent, id)) = get_expr_use_or_unification_node(cx.tcx, e) - && let Node::Expr(parent) = parent - && let ExprKind::Match(scrutinee, ..) = parent.kind - && scrutinee.hir_id == id - { - // Don't lint. Byte strings produce `&[u8; N]` whereas `as_bytes()` produces - // `&[u8]`. This change would prevent matching with different sized slices. - } else if !callsite.starts_with("env!") { - span_lint_and_sugg( - cx, - STRING_LIT_AS_BYTES, - e.span, - "calling `as_bytes()` on a string literal", - "consider using a byte string literal instead", - format!( - "b{}", - snippet_with_applicability(cx, receiver.span, r#""foo""#, &mut applicability) - ), - applicability, - ); - } } } } - if_chain! { - if let ExprKind::MethodCall(path, recv, [], _) = &e.kind; - if path.ident.name == sym!(into_bytes); - if let ExprKind::MethodCall(path, recv, [], _) = &recv.kind; - if matches!(path.ident.name.as_str(), "to_owned" | "to_string"); - if let ExprKind::Lit(lit) = &recv.kind; - if let LitKind::Str(lit_content, _) = &lit.node; - - if lit_content.as_str().is_ascii(); - if lit_content.as_str().len() <= MAX_LENGTH_BYTE_STRING_LIT; - if !recv.span.from_expansion(); - then { - let mut applicability = Applicability::MachineApplicable; + if let ExprKind::MethodCall(path, recv, [], _) = &e.kind + && path.ident.name == sym!(into_bytes) + && let ExprKind::MethodCall(path, recv, [], _) = &recv.kind + && matches!(path.ident.name.as_str(), "to_owned" | "to_string") + && let ExprKind::Lit(lit) = &recv.kind + && let LitKind::Str(lit_content, _) = &lit.node + && lit_content.as_str().is_ascii() + && lit_content.as_str().len() <= MAX_LENGTH_BYTE_STRING_LIT + && !recv.span.from_expansion() + { + let mut applicability = Applicability::MachineApplicable; - span_lint_and_sugg( - cx, - STRING_LIT_AS_BYTES, - e.span, - "calling `into_bytes()` on a string literal", - "consider using a byte string literal instead", - format!( - "b{}.to_vec()", - snippet_with_applicability(cx, recv.span, r#""..""#, &mut applicability) - ), - applicability, - ); - } + span_lint_and_sugg( + cx, + STRING_LIT_AS_BYTES, + e.span, + "calling `into_bytes()` on a string literal", + "consider using a byte string literal instead", + format!( + "b{}.to_vec()", + snippet_with_applicability(cx, recv.span, r#""..""#, &mut applicability) + ), + applicability, + ); } } } @@ -406,22 +392,20 @@ declare_lint_pass!(StrToString => [STR_TO_STRING]); impl<'tcx> LateLintPass<'tcx> for StrToString { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &Expr<'_>) { - if_chain! { - if let ExprKind::MethodCall(path, self_arg, ..) = &expr.kind; - if path.ident.name == sym::to_string; - let ty = cx.typeck_results().expr_ty(self_arg); - if let ty::Ref(_, ty, ..) = ty.kind(); - if ty.is_str(); - then { - span_lint_and_help( - cx, - STR_TO_STRING, - expr.span, - "`to_string()` called on a `&str`", - None, - "consider using `.to_owned()`", - ); - } + if let ExprKind::MethodCall(path, self_arg, ..) = &expr.kind + && path.ident.name == sym::to_string + && let ty = cx.typeck_results().expr_ty(self_arg) + && let ty::Ref(_, ty, ..) = ty.kind() + && ty.is_str() + { + span_lint_and_help( + cx, + STR_TO_STRING, + expr.span, + "`to_string()` called on a `&str`", + None, + "consider using `.to_owned()`", + ); } } } @@ -456,21 +440,19 @@ declare_lint_pass!(StringToString => [STRING_TO_STRING]); impl<'tcx> LateLintPass<'tcx> for StringToString { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &Expr<'_>) { - if_chain! { - if let ExprKind::MethodCall(path, self_arg, ..) = &expr.kind; - if path.ident.name == sym::to_string; - let ty = cx.typeck_results().expr_ty(self_arg); - if is_type_lang_item(cx, ty, LangItem::String); - then { - span_lint_and_help( - cx, - STRING_TO_STRING, - expr.span, - "`to_string()` called on a `String`", - None, - "consider using `.clone()`", - ); - } + if let ExprKind::MethodCall(path, self_arg, ..) = &expr.kind + && path.ident.name == sym::to_string + && let ty = cx.typeck_results().expr_ty(self_arg) + && is_type_lang_item(cx, ty, LangItem::String) + { + span_lint_and_help( + cx, + STRING_TO_STRING, + expr.span, + "`to_string()` called on a `String`", + None, + "consider using `.clone()`", + ); } } } @@ -500,26 +482,24 @@ declare_lint_pass!(TrimSplitWhitespace => [TRIM_SPLIT_WHITESPACE]); impl<'tcx> LateLintPass<'tcx> for TrimSplitWhitespace { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &Expr<'_>) { let tyckres = cx.typeck_results(); - if_chain! { - if let ExprKind::MethodCall(path, split_recv, [], split_ws_span) = expr.kind; - if path.ident.name == sym!(split_whitespace); - if let Some(split_ws_def_id) = tyckres.type_dependent_def_id(expr.hir_id); - if cx.tcx.is_diagnostic_item(sym::str_split_whitespace, split_ws_def_id); - if let ExprKind::MethodCall(path, _trim_recv, [], trim_span) = split_recv.kind; - if let trim_fn_name @ ("trim" | "trim_start" | "trim_end") = path.ident.name.as_str(); - if let Some(trim_def_id) = tyckres.type_dependent_def_id(split_recv.hir_id); - if is_one_of_trim_diagnostic_items(cx, trim_def_id); - then { - span_lint_and_sugg( - cx, - TRIM_SPLIT_WHITESPACE, - trim_span.with_hi(split_ws_span.lo()), - &format!("found call to `str::{trim_fn_name}` before `str::split_whitespace`"), - &format!("remove `{trim_fn_name}()`"), - String::new(), - Applicability::MachineApplicable, - ); - } + if let ExprKind::MethodCall(path, split_recv, [], split_ws_span) = expr.kind + && path.ident.name == sym!(split_whitespace) + && let Some(split_ws_def_id) = tyckres.type_dependent_def_id(expr.hir_id) + && cx.tcx.is_diagnostic_item(sym::str_split_whitespace, split_ws_def_id) + && let ExprKind::MethodCall(path, _trim_recv, [], trim_span) = split_recv.kind + && let trim_fn_name @ ("trim" | "trim_start" | "trim_end") = path.ident.name.as_str() + && let Some(trim_def_id) = tyckres.type_dependent_def_id(split_recv.hir_id) + && is_one_of_trim_diagnostic_items(cx, trim_def_id) + { + span_lint_and_sugg( + cx, + TRIM_SPLIT_WHITESPACE, + trim_span.with_hi(split_ws_span.lo()), + &format!("found call to `str::{trim_fn_name}` before `str::split_whitespace`"), + &format!("remove `{trim_fn_name}()`"), + String::new(), + Applicability::MachineApplicable, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/strlen_on_c_strings.rs b/src/tools/clippy/clippy_lints/src/strlen_on_c_strings.rs index b3db5e9a4..8cf4715ee 100644 --- a/src/tools/clippy/clippy_lints/src/strlen_on_c_strings.rs +++ b/src/tools/clippy/clippy_lints/src/strlen_on_c_strings.rs @@ -3,11 +3,10 @@ use clippy_utils::source::snippet_with_context; use clippy_utils::ty::{is_type_diagnostic_item, is_type_lang_item}; use clippy_utils::visitors::is_expr_unsafe; use clippy_utils::{get_parent_node, match_libc_symbol}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{Block, BlockCheckMode, Expr, ExprKind, LangItem, Node, UnsafeSource}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::symbol::sym; declare_clippy_lint! { @@ -41,48 +40,45 @@ declare_lint_pass!(StrlenOnCStrings => [STRLEN_ON_C_STRINGS]); impl<'tcx> LateLintPass<'tcx> for StrlenOnCStrings { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) { - if_chain! { - if !expr.span.from_expansion(); - if let ExprKind::Call(func, [recv]) = expr.kind; - if let ExprKind::Path(path) = &func.kind; - if let Some(did) = cx.qpath_res(path, func.hir_id).opt_def_id(); - if match_libc_symbol(cx, did, "strlen"); - if let ExprKind::MethodCall(path, self_arg, [], _) = recv.kind; - if !recv.span.from_expansion(); - if path.ident.name == sym::as_ptr; - then { - let ctxt = expr.span.ctxt(); - let span = match get_parent_node(cx.tcx, expr.hir_id) { - Some(Node::Block(&Block { - rules: BlockCheckMode::UnsafeBlock(UnsafeSource::UserProvided), span, .. - })) - if span.ctxt() == ctxt && !is_expr_unsafe(cx, self_arg) => { - span - } - _ => expr.span, - }; + if !expr.span.from_expansion() + && let ExprKind::Call(func, [recv]) = expr.kind + && let ExprKind::Path(path) = &func.kind + && let Some(did) = cx.qpath_res(path, func.hir_id).opt_def_id() + && match_libc_symbol(cx, did, "strlen") + && let ExprKind::MethodCall(path, self_arg, [], _) = recv.kind + && !recv.span.from_expansion() + && path.ident.name == sym::as_ptr + { + let ctxt = expr.span.ctxt(); + let span = match get_parent_node(cx.tcx, expr.hir_id) { + Some(Node::Block(&Block { + rules: BlockCheckMode::UnsafeBlock(UnsafeSource::UserProvided), + span, + .. + })) if span.ctxt() == ctxt && !is_expr_unsafe(cx, self_arg) => span, + _ => expr.span, + }; - let ty = cx.typeck_results().expr_ty(self_arg).peel_refs(); - let mut app = Applicability::MachineApplicable; - let val_name = snippet_with_context(cx, self_arg.span, ctxt, "..", &mut app).0; - let method_name = if is_type_diagnostic_item(cx, ty, sym::cstring_type) { - "as_bytes" - } else if is_type_lang_item(cx, ty, LangItem::CStr) { - "to_bytes" - } else { - return; - }; + let ty = cx.typeck_results().expr_ty(self_arg).peel_refs(); + let mut app = Applicability::MachineApplicable; + let val_name = snippet_with_context(cx, self_arg.span, ctxt, "..", &mut app).0; + let method_name = if is_type_diagnostic_item(cx, ty, sym::cstring_type) { + "as_bytes" + } else if is_type_lang_item(cx, ty, LangItem::CStr) { + "to_bytes" + } else { + return; + }; - span_lint_and_sugg( - cx, - STRLEN_ON_C_STRINGS, - span, - "using `libc::strlen` on a `CString` or `CStr` value", - "try", - format!("{val_name}.{method_name}().len()"), - app, - ); - } + span_lint_and_sugg( + cx, + STRLEN_ON_C_STRINGS, + span, + "using `libc::strlen` on a `CString` or `CStr` value", + "try", + format!("{val_name}.{method_name}().len()"), + app, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/suspicious_doc_comments.rs b/src/tools/clippy/clippy_lints/src/suspicious_doc_comments.rs deleted file mode 100644 index 0abc199da..000000000 --- a/src/tools/clippy/clippy_lints/src/suspicious_doc_comments.rs +++ /dev/null @@ -1,95 +0,0 @@ -use clippy_utils::diagnostics::{multispan_sugg_with_applicability, span_lint_and_then}; -use if_chain::if_chain; -use rustc_ast::token::CommentKind; -use rustc_ast::{AttrKind, AttrStyle, Attribute, Item}; -use rustc_errors::Applicability; -use rustc_lint::{EarlyContext, EarlyLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; -use rustc_span::Span; - -declare_clippy_lint! { - /// ### What it does - /// Detects the use of outer doc comments (`///`, `/**`) followed by a bang (`!`): `///!` - /// - /// ### Why is this bad? - /// Triple-slash comments (known as "outer doc comments") apply to items that follow it. - /// An outer doc comment followed by a bang (i.e. `///!`) has no specific meaning. - /// - /// The user most likely meant to write an inner doc comment (`//!`, `/*!`), which - /// applies to the parent item (i.e. the item that the comment is contained in, - /// usually a module or crate). - /// - /// ### Known problems - /// Inner doc comments can only appear before items, so there are certain cases where the suggestion - /// made by this lint is not valid code. For example: - /// ```rs - /// fn foo() {} - /// ///! - /// fn bar() {} - /// ``` - /// This lint detects the doc comment and suggests changing it to `//!`, but an inner doc comment - /// is not valid at that position. - /// - /// ### Example - /// In this example, the doc comment is attached to the *function*, rather than the *module*. - /// ```no_run - /// pub mod util { - /// ///! This module contains utility functions. - /// - /// pub fn dummy() {} - /// } - /// ``` - /// - /// Use instead: - /// ```no_run - /// pub mod util { - /// //! This module contains utility functions. - /// - /// pub fn dummy() {} - /// } - /// ``` - #[clippy::version = "1.70.0"] - pub SUSPICIOUS_DOC_COMMENTS, - suspicious, - "suspicious usage of (outer) doc comments" -} -declare_lint_pass!(SuspiciousDocComments => [SUSPICIOUS_DOC_COMMENTS]); - -const WARNING: &str = "this is an outer doc comment and does not apply to the parent module or crate"; -const HELP: &str = "use an inner doc comment to document the parent module or crate"; - -impl EarlyLintPass for SuspiciousDocComments { - fn check_item(&mut self, cx: &EarlyContext<'_>, item: &Item) { - let replacements = collect_doc_comment_replacements(&item.attrs); - - if let Some(((lo_span, _), (hi_span, _))) = replacements.first().zip(replacements.last()) { - let span = lo_span.to(*hi_span); - - span_lint_and_then(cx, SUSPICIOUS_DOC_COMMENTS, span, WARNING, |diag| { - multispan_sugg_with_applicability(diag, HELP, Applicability::MaybeIncorrect, replacements); - }); - } - } -} - -fn collect_doc_comment_replacements(attrs: &[Attribute]) -> Vec<(Span, String)> { - attrs - .iter() - .filter_map(|attr| { - if_chain! { - if let AttrKind::DocComment(com_kind, sym) = attr.kind; - if let AttrStyle::Outer = attr.style; - if let Some(com) = sym.as_str().strip_prefix('!'); - then { - let sugg = match com_kind { - CommentKind::Line => format!("//!{com}"), - CommentKind::Block => format!("/*!{com}*/") - }; - Some((attr.span, sugg)) - } else { - None - } - } - }) - .collect() -} diff --git a/src/tools/clippy/clippy_lints/src/suspicious_operation_groupings.rs b/src/tools/clippy/clippy_lints/src/suspicious_operation_groupings.rs index bb8cde5b9..8b9d9bade 100644 --- a/src/tools/clippy/clippy_lints/src/suspicious_operation_groupings.rs +++ b/src/tools/clippy/clippy_lints/src/suspicious_operation_groupings.rs @@ -2,12 +2,11 @@ use clippy_utils::ast_utils::{eq_id, is_useless_with_eq_exprs, IdentIter}; use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet_with_applicability; use core::ops::{Add, AddAssign}; -use if_chain::if_chain; use rustc_ast::ast::{BinOpKind, Expr, ExprKind, StmtKind}; use rustc_data_structures::fx::FxHashSet; use rustc_errors::Applicability; use rustc_lint::{EarlyContext, EarlyLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::source_map::Spanned; use rustc_span::symbol::Ident; use rustc_span::Span; @@ -155,34 +154,22 @@ fn check_binops(cx: &EarlyContext<'_>, binops: &[&BinaryOp<'_>]) { match (no_difference_info, double_difference_info) { (Some(i), None) => attempt_to_emit_no_difference_lint(cx, binops, i, expected_loc), (None, Some((double_difference_index, ident_loc1, ident_loc2))) => { - if_chain! { - if one_ident_difference_count == binop_count - 1; - if let Some(binop) = binops.get(double_difference_index); - then { - let changed_loc = if ident_loc1 == expected_loc { - ident_loc2 - } else if ident_loc2 == expected_loc { - ident_loc1 - } else { - // This expression doesn't match the form we're - // looking for. - return; - }; - - if let Some(sugg) = ident_swap_sugg( - cx, - &paired_identifiers, - binop, - changed_loc, - &mut applicability, - ) { - emit_suggestion( - cx, - binop.span, - sugg, - applicability, - ); - } + if one_ident_difference_count == binop_count - 1 + && let Some(binop) = binops.get(double_difference_index) + { + let changed_loc = if ident_loc1 == expected_loc { + ident_loc2 + } else if ident_loc2 == expected_loc { + ident_loc1 + } else { + // This expression doesn't match the form we're + // looking for. + return; + }; + + if let Some(sugg) = ident_swap_sugg(cx, &paired_identifiers, binop, changed_loc, &mut applicability) + { + emit_suggestion(cx, binop.span, sugg, applicability); } } }, @@ -212,48 +199,32 @@ fn attempt_to_emit_no_difference_lint( let old_right_ident = get_ident(binop.right, expected_loc); for b in skip_index(binops.iter(), i) { - if_chain! { - if let (Some(old_ident), Some(new_ident)) = - (old_left_ident, get_ident(b.left, expected_loc)); - if old_ident != new_ident; - if let Some(sugg) = suggestion_with_swapped_ident( + if let (Some(old_ident), Some(new_ident)) = (old_left_ident, get_ident(b.left, expected_loc)) + && old_ident != new_ident + && let Some(sugg) = + suggestion_with_swapped_ident(cx, binop.left, expected_loc, new_ident, &mut applicability) + { + emit_suggestion( cx, - binop.left, - expected_loc, - new_ident, - &mut applicability, + binop.span, + replace_left_sugg(cx, binop, &sugg, &mut applicability), + applicability, ); - then { - emit_suggestion( - cx, - binop.span, - replace_left_sugg(cx, binop, &sugg, &mut applicability), - applicability, - ); - return; - } + return; } - if_chain! { - if let (Some(old_ident), Some(new_ident)) = - (old_right_ident, get_ident(b.right, expected_loc)); - if old_ident != new_ident; - if let Some(sugg) = suggestion_with_swapped_ident( + if let (Some(old_ident), Some(new_ident)) = (old_right_ident, get_ident(b.right, expected_loc)) + && old_ident != new_ident + && let Some(sugg) = + suggestion_with_swapped_ident(cx, binop.right, expected_loc, new_ident, &mut applicability) + { + emit_suggestion( cx, - binop.right, - expected_loc, - new_ident, - &mut applicability, + binop.span, + replace_right_sugg(cx, binop, &sugg, &mut applicability), + applicability, ); - then { - emit_suggestion( - cx, - binop.span, - replace_right_sugg(cx, binop, &sugg, &mut applicability), - applicability, - ); - return; - } + return; } } } @@ -327,7 +298,7 @@ fn replace_left_sugg( ) -> String { format!( "{left_suggestion} {} {}", - binop.op.to_string(), + binop.op.as_str(), snippet_with_applicability(cx, binop.right.span, "..", applicability), ) } @@ -341,7 +312,7 @@ fn replace_right_sugg( format!( "{} {} {right_suggestion}", snippet_with_applicability(cx, binop.left.span, "..", applicability), - binop.op.to_string(), + binop.op.as_str(), ) } diff --git a/src/tools/clippy/clippy_lints/src/suspicious_trait_impl.rs b/src/tools/clippy/clippy_lints/src/suspicious_trait_impl.rs index 6271ea027..8eab3f587 100644 --- a/src/tools/clippy/clippy_lints/src/suspicious_trait_impl.rs +++ b/src/tools/clippy/clippy_lints/src/suspicious_trait_impl.rs @@ -2,10 +2,9 @@ use clippy_utils::diagnostics::span_lint; use clippy_utils::visitors::for_each_expr; use clippy_utils::{binop_traits, trait_ref_of_method, BINOP_TRAITS, OP_ASSIGN_TRAITS}; use core::ops::ControlFlow; -use if_chain::if_chain; use rustc_hir as hir; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does @@ -57,37 +56,39 @@ declare_lint_pass!(SuspiciousImpl => [SUSPICIOUS_ARITHMETIC_IMPL, SUSPICIOUS_OP_ impl<'tcx> LateLintPass<'tcx> for SuspiciousImpl { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx hir::Expr<'_>) { - if_chain! { - if let hir::ExprKind::Binary(binop, _, _) | hir::ExprKind::AssignOp(binop, ..) = expr.kind; - if let Some((binop_trait_lang, op_assign_trait_lang)) = binop_traits(binop.node); - if let Some(binop_trait_id) = cx.tcx.lang_items().get(binop_trait_lang); - if let Some(op_assign_trait_id) = cx.tcx.lang_items().get(op_assign_trait_lang); + if let hir::ExprKind::Binary(binop, _, _) | hir::ExprKind::AssignOp(binop, ..) = expr.kind + && let Some((binop_trait_lang, op_assign_trait_lang)) = binop_traits(binop.node) + && let Some(binop_trait_id) = cx.tcx.lang_items().get(binop_trait_lang) + && let Some(op_assign_trait_id) = cx.tcx.lang_items().get(op_assign_trait_lang) // Check for more than one binary operation in the implemented function // Linting when multiple operations are involved can result in false positives - let parent_fn = cx.tcx.hir().get_parent_item(expr.hir_id).def_id; - if let hir::Node::ImplItem(impl_item) = cx.tcx.hir().get_by_def_id(parent_fn); - if let hir::ImplItemKind::Fn(_, body_id) = impl_item.kind; - let body = cx.tcx.hir().body(body_id); - let parent_fn = cx.tcx.hir().get_parent_item(expr.hir_id).def_id; - if let Some(trait_ref) = trait_ref_of_method(cx, parent_fn); - let trait_id = trait_ref.path.res.def_id(); - if ![binop_trait_id, op_assign_trait_id].contains(&trait_id); - if let Some(&(_, lint)) = [ + && let parent_fn = cx.tcx.hir().get_parent_item(expr.hir_id).def_id + && let hir::Node::ImplItem(impl_item) = cx.tcx.hir_node_by_def_id(parent_fn) + && let hir::ImplItemKind::Fn(_, body_id) = impl_item.kind + && let body = cx.tcx.hir().body(body_id) + && let parent_fn = cx.tcx.hir().get_parent_item(expr.hir_id).def_id + && let Some(trait_ref) = trait_ref_of_method(cx, parent_fn) + && let trait_id = trait_ref.path.res.def_id() + && ![binop_trait_id, op_assign_trait_id].contains(&trait_id) + && let Some(&(_, lint)) = [ (&BINOP_TRAITS, SUSPICIOUS_ARITHMETIC_IMPL), (&OP_ASSIGN_TRAITS, SUSPICIOUS_OP_ASSIGN_IMPL), ] .iter() - .find(|&(ts, _)| ts.iter().any(|&t| Some(trait_id) == cx.tcx.lang_items().get(t))); - if count_binops(body.value) == 1; - then { - span_lint( - cx, - lint, - binop.span, - &format!("suspicious use of `{}` in `{}` impl", binop.node.as_str(), cx.tcx.item_name(trait_id)), - ); - } + .find(|&(ts, _)| ts.iter().any(|&t| Some(trait_id) == cx.tcx.lang_items().get(t))) + && count_binops(body.value) == 1 + { + span_lint( + cx, + lint, + binop.span, + &format!( + "suspicious use of `{}` in `{}` impl", + binop.node.as_str(), + cx.tcx.item_name(trait_id) + ), + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/suspicious_xor_used_as_pow.rs b/src/tools/clippy/clippy_lints/src/suspicious_xor_used_as_pow.rs index 4340c23f8..1cc27670f 100644 --- a/src/tools/clippy/clippy_lints/src/suspicious_xor_used_as_pow.rs +++ b/src/tools/clippy/clippy_lints/src/suspicious_xor_used_as_pow.rs @@ -6,7 +6,7 @@ use rustc_errors::Applicability; use rustc_hir::{BinOpKind, Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/swap.rs b/src/tools/clippy/clippy_lints/src/swap.rs index 660e6835e..daa6fe871 100644 --- a/src/tools/clippy/clippy_lints/src/swap.rs +++ b/src/tools/clippy/clippy_lints/src/swap.rs @@ -3,13 +3,12 @@ use clippy_utils::source::snippet_with_context; use clippy_utils::sugg::Sugg; use clippy_utils::ty::is_type_diagnostic_item; use clippy_utils::{can_mut_borrow_both, eq_expr_value, in_constant, std_or_core}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{BinOpKind, Block, Expr, ExprKind, PatKind, QPath, Stmt, StmtKind}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; use rustc_middle::ty; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::source_map::Spanned; use rustc_span::symbol::Ident; use rustc_span::{sym, Span, SyntaxContext}; @@ -149,36 +148,33 @@ fn check_manual_swap(cx: &LateContext<'_>, block: &Block<'_>) { } for [s1, s2, s3] in block.stmts.array_windows::<3>() { - if_chain! { + if let StmtKind::Local(tmp) = s1.kind // let t = foo(); - if let StmtKind::Local(tmp) = s1.kind; - if let Some(tmp_init) = tmp.init; - if let PatKind::Binding(.., ident, None) = tmp.pat.kind; + && let Some(tmp_init) = tmp.init + && let PatKind::Binding(.., ident, None) = tmp.pat.kind // foo() = bar(); - if let StmtKind::Semi(first) = s2.kind; - if let ExprKind::Assign(lhs1, rhs1, _) = first.kind; + && let StmtKind::Semi(first) = s2.kind + && let ExprKind::Assign(lhs1, rhs1, _) = first.kind // bar() = t; - if let StmtKind::Semi(second) = s3.kind; - if let ExprKind::Assign(lhs2, rhs2, _) = second.kind; - if let ExprKind::Path(QPath::Resolved(None, rhs2)) = rhs2.kind; - if rhs2.segments.len() == 1; + && let StmtKind::Semi(second) = s3.kind + && let ExprKind::Assign(lhs2, rhs2, _) = second.kind + && let ExprKind::Path(QPath::Resolved(None, rhs2)) = rhs2.kind + && rhs2.segments.len() == 1 - if ident.name == rhs2.segments[0].ident.name; - if eq_expr_value(cx, tmp_init, lhs1); - if eq_expr_value(cx, rhs1, lhs2); + && ident.name == rhs2.segments[0].ident.name + && eq_expr_value(cx, tmp_init, lhs1) + && eq_expr_value(cx, rhs1, lhs2) - let ctxt = s1.span.ctxt(); - if s2.span.ctxt() == ctxt; - if s3.span.ctxt() == ctxt; - if first.span.ctxt() == ctxt; - if second.span.ctxt() == ctxt; - - then { - let span = s1.span.to(s3.span); - generate_swap_warning(cx, lhs1, lhs2, span, false); - } + && let ctxt = s1.span.ctxt() + && s2.span.ctxt() == ctxt + && s3.span.ctxt() == ctxt + && first.span.ctxt() == ctxt + && second.span.ctxt() == ctxt + { + let span = s1.span.to(s3.span); + generate_swap_warning(cx, lhs1, lhs2, span, false); } } } @@ -261,20 +257,18 @@ fn parse<'a, 'hir>(stmt: &'a Stmt<'hir>) -> Option<(ExprOrIdent<'hir>, &'a Expr< fn check_xor_swap(cx: &LateContext<'_>, block: &Block<'_>) { for [s1, s2, s3] in block.stmts.array_windows::<3>() { let ctxt = s1.span.ctxt(); - if_chain! { - if let Some((lhs0, rhs0)) = extract_sides_of_xor_assign(s1, ctxt); - if let Some((lhs1, rhs1)) = extract_sides_of_xor_assign(s2, ctxt); - if let Some((lhs2, rhs2)) = extract_sides_of_xor_assign(s3, ctxt); - if eq_expr_value(cx, lhs0, rhs1); - if eq_expr_value(cx, lhs2, rhs1); - if eq_expr_value(cx, lhs1, rhs0); - if eq_expr_value(cx, lhs1, rhs2); - if s2.span.ctxt() == ctxt; - if s3.span.ctxt() == ctxt; - then { - let span = s1.span.to(s3.span); - generate_swap_warning(cx, lhs0, rhs0, span, true); - } + if let Some((lhs0, rhs0)) = extract_sides_of_xor_assign(s1, ctxt) + && let Some((lhs1, rhs1)) = extract_sides_of_xor_assign(s2, ctxt) + && let Some((lhs2, rhs2)) = extract_sides_of_xor_assign(s3, ctxt) + && eq_expr_value(cx, lhs0, rhs1) + && eq_expr_value(cx, lhs2, rhs1) + && eq_expr_value(cx, lhs1, rhs0) + && eq_expr_value(cx, lhs1, rhs2) + && s2.span.ctxt() == ctxt + && s3.span.ctxt() == ctxt + { + let span = s1.span.to(s3.span); + generate_swap_warning(cx, lhs0, rhs0, span, true); }; } } diff --git a/src/tools/clippy/clippy_lints/src/swap_ptr_to_ref.rs b/src/tools/clippy/clippy_lints/src/swap_ptr_to_ref.rs index 6a6c94425..20e9608a1 100644 --- a/src/tools/clippy/clippy_lints/src/swap_ptr_to_ref.rs +++ b/src/tools/clippy/clippy_lints/src/swap_ptr_to_ref.rs @@ -4,7 +4,7 @@ use clippy_utils::source::snippet_with_context; use rustc_errors::Applicability; use rustc_hir::{BorrowKind, Expr, ExprKind, Mutability, UnOp}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::{sym, Span, SyntaxContext}; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/tabs_in_doc_comments.rs b/src/tools/clippy/clippy_lints/src/tabs_in_doc_comments.rs index dcf1fac02..af9e13dba 100644 --- a/src/tools/clippy/clippy_lints/src/tabs_in_doc_comments.rs +++ b/src/tools/clippy/clippy_lints/src/tabs_in_doc_comments.rs @@ -2,7 +2,7 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use rustc_ast::ast; use rustc_errors::Applicability; use rustc_lint::{EarlyContext, EarlyLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::{BytePos, Span}; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/temporary_assignment.rs b/src/tools/clippy/clippy_lints/src/temporary_assignment.rs index c717ccc35..8151dd8f2 100644 --- a/src/tools/clippy/clippy_lints/src/temporary_assignment.rs +++ b/src/tools/clippy/clippy_lints/src/temporary_assignment.rs @@ -2,7 +2,7 @@ use clippy_utils::diagnostics::span_lint; use clippy_utils::is_adjusted; use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/tests_outside_test_module.rs b/src/tools/clippy/clippy_lints/src/tests_outside_test_module.rs index 0cfb1c125..da5575826 100644 --- a/src/tools/clippy/clippy_lints/src/tests_outside_test_module.rs +++ b/src/tools/clippy/clippy_lints/src/tests_outside_test_module.rs @@ -3,7 +3,7 @@ use clippy_utils::{is_in_cfg_test, is_in_test_function}; use rustc_hir::intravisit::FnKind; use rustc_hir::{Body, FnDecl}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::def_id::LocalDefId; use rustc_span::Span; @@ -55,20 +55,18 @@ impl LateLintPass<'_> for TestsOutsideTestModule { sp: Span, _: LocalDefId, ) { - if_chain! { - if !matches!(kind, FnKind::Closure); - if is_in_test_function(cx.tcx, body.id().hir_id); - if !is_in_cfg_test(cx.tcx, body.id().hir_id); - then { - span_lint_and_note( - cx, - TESTS_OUTSIDE_TEST_MODULE, - sp, - "this function marked with #[test] is outside a #[cfg(test)] module", - None, - "move it to a testing module marked with #[cfg(test)]", - ); - } + if !matches!(kind, FnKind::Closure) + && is_in_test_function(cx.tcx, body.id().hir_id) + && !is_in_cfg_test(cx.tcx, body.id().hir_id) + { + span_lint_and_note( + cx, + TESTS_OUTSIDE_TEST_MODULE, + sp, + "this function marked with #[test] is outside a #[cfg(test)] module", + None, + "move it to a testing module marked with #[cfg(test)]", + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/to_digit_is_some.rs b/src/tools/clippy/clippy_lints/src/to_digit_is_some.rs index a171d225f..dafe9e388 100644 --- a/src/tools/clippy/clippy_lints/src/to_digit_is_some.rs +++ b/src/tools/clippy/clippy_lints/src/to_digit_is_some.rs @@ -1,12 +1,11 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::match_def_path; use clippy_utils::source::snippet_with_applicability; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does @@ -38,59 +37,57 @@ declare_lint_pass!(ToDigitIsSome => [TO_DIGIT_IS_SOME]); impl<'tcx> LateLintPass<'tcx> for ToDigitIsSome { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx hir::Expr<'_>) { - if_chain! { - if let hir::ExprKind::MethodCall(is_some_path, to_digit_expr, [], _) = &expr.kind; - if is_some_path.ident.name.as_str() == "is_some"; - then { - let match_result = match &to_digit_expr.kind { - hir::ExprKind::MethodCall(to_digits_path, char_arg, [radix_arg], _) => { - if_chain! { - if to_digits_path.ident.name.as_str() == "to_digit"; - let char_arg_ty = cx.typeck_results().expr_ty_adjusted(char_arg); - if *char_arg_ty.kind() == ty::Char; - then { - Some((true, *char_arg, radix_arg)) - } else { - None - } - } + if let hir::ExprKind::MethodCall(is_some_path, to_digit_expr, [], _) = &expr.kind + && is_some_path.ident.name.as_str() == "is_some" + { + let match_result = match &to_digit_expr.kind { + hir::ExprKind::MethodCall(to_digits_path, char_arg, [radix_arg], _) => { + if to_digits_path.ident.name.as_str() == "to_digit" + && let char_arg_ty = cx.typeck_results().expr_ty_adjusted(char_arg) + && *char_arg_ty.kind() == ty::Char + { + Some((true, *char_arg, radix_arg)) + } else { + None } - hir::ExprKind::Call(to_digits_call, to_digit_args) => { - if_chain! { - if let [char_arg, radix_arg] = *to_digit_args; - if let hir::ExprKind::Path(to_digits_path) = &to_digits_call.kind; - if let to_digits_call_res = cx.qpath_res(to_digits_path, to_digits_call.hir_id); - if let Some(to_digits_def_id) = to_digits_call_res.opt_def_id(); - if match_def_path(cx, to_digits_def_id, &["core", "char", "methods", "<impl char>", "to_digit"]); - then { - Some((false, char_arg, radix_arg)) - } else { - None - } - } + }, + hir::ExprKind::Call(to_digits_call, to_digit_args) => { + if let [char_arg, radix_arg] = *to_digit_args + && let hir::ExprKind::Path(to_digits_path) = &to_digits_call.kind + && let to_digits_call_res = cx.qpath_res(to_digits_path, to_digits_call.hir_id) + && let Some(to_digits_def_id) = to_digits_call_res.opt_def_id() + && match_def_path( + cx, + to_digits_def_id, + &["core", "char", "methods", "<impl char>", "to_digit"], + ) + { + Some((false, char_arg, radix_arg)) + } else { + None } - _ => None - }; + }, + _ => None, + }; - if let Some((is_method_call, char_arg, radix_arg)) = match_result { - let mut applicability = Applicability::MachineApplicable; - let char_arg_snip = snippet_with_applicability(cx, char_arg.span, "_", &mut applicability); - let radix_snip = snippet_with_applicability(cx, radix_arg.span, "_", &mut applicability); + if let Some((is_method_call, char_arg, radix_arg)) = match_result { + let mut applicability = Applicability::MachineApplicable; + let char_arg_snip = snippet_with_applicability(cx, char_arg.span, "_", &mut applicability); + let radix_snip = snippet_with_applicability(cx, radix_arg.span, "_", &mut applicability); - span_lint_and_sugg( - cx, - TO_DIGIT_IS_SOME, - expr.span, - "use of `.to_digit(..).is_some()`", - "try", - if is_method_call { - format!("{char_arg_snip}.is_digit({radix_snip})") - } else { - format!("char::is_digit({char_arg_snip}, {radix_snip})") - }, - applicability, - ); - } + span_lint_and_sugg( + cx, + TO_DIGIT_IS_SOME, + expr.span, + "use of `.to_digit(..).is_some()`", + "try", + if is_method_call { + format!("{char_arg_snip}.is_digit({radix_snip})") + } else { + format!("char::is_digit({char_arg_snip}, {radix_snip})") + }, + applicability, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/trailing_empty_array.rs b/src/tools/clippy/clippy_lints/src/trailing_empty_array.rs index 87181adc2..cbdf31c93 100644 --- a/src/tools/clippy/clippy_lints/src/trailing_empty_array.rs +++ b/src/tools/clippy/clippy_lints/src/trailing_empty_array.rs @@ -3,7 +3,7 @@ use clippy_utils::has_repr_attr; use rustc_hir::{Item, ItemKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::Const; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does @@ -54,20 +54,18 @@ impl<'tcx> LateLintPass<'tcx> for TrailingEmptyArray { } fn is_struct_with_trailing_zero_sized_array(cx: &LateContext<'_>, item: &Item<'_>) -> bool { - if_chain! { + if let ItemKind::Struct(data, _) = &item.kind // First check if last field is an array - if let ItemKind::Struct(data, _) = &item.kind; - if let Some(last_field) = data.fields().last(); - if let rustc_hir::TyKind::Array(_, rustc_hir::ArrayLen::Body(length)) = last_field.ty.kind; + && let Some(last_field) = data.fields().last() + && let rustc_hir::TyKind::Array(_, rustc_hir::ArrayLen::Body(length)) = last_field.ty.kind // Then check if that array is zero-sized - let length = Const::from_anon_const(cx.tcx, length.def_id); - let length = length.try_eval_target_usize(cx.tcx, cx.param_env); - if let Some(length) = length; - then { - length == 0 - } else { - false - } + && let length = Const::from_anon_const(cx.tcx, length.def_id) + && let length = length.try_eval_target_usize(cx.tcx, cx.param_env) + && let Some(length) = length + { + length == 0 + } else { + false } } diff --git a/src/tools/clippy/clippy_lints/src/trait_bounds.rs b/src/tools/clippy/clippy_lints/src/trait_bounds.rs index f065d215e..e4054393d 100644 --- a/src/tools/clippy/clippy_lints/src/trait_bounds.rs +++ b/src/tools/clippy/clippy_lints/src/trait_bounds.rs @@ -3,7 +3,6 @@ use clippy_utils::diagnostics::{span_lint_and_help, span_lint_and_sugg}; use clippy_utils::source::{snippet, snippet_opt, snippet_with_applicability}; use clippy_utils::{is_from_proc_macro, SpanlessEq, SpanlessHash}; use core::hash::{Hash, Hasher}; -use if_chain::if_chain; use itertools::Itertools; use rustc_data_structures::fx::{FxHashMap, FxHashSet}; use rustc_data_structures::unhash::UnhashMap; @@ -14,7 +13,7 @@ use rustc_hir::{ TraitBoundModifier, TraitItem, TraitRef, Ty, TyKind, WherePredicate, }; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::{BytePos, Span}; use std::collections::hash_map::Entry; @@ -124,103 +123,100 @@ impl<'tcx> LateLintPass<'tcx> for TraitBounds { let mut self_bounds_map = FxHashMap::default(); for predicate in item.generics.predicates { - if_chain! { - if let WherePredicate::BoundPredicate(ref bound_predicate) = predicate; - if bound_predicate.origin != PredicateOrigin::ImplTrait; - if !bound_predicate.span.from_expansion(); - if let TyKind::Path(QPath::Resolved(_, Path { segments, .. })) = bound_predicate.bounded_ty.kind; - if let Some(PathSegment { - res: Res::SelfTyParam { trait_: def_id }, .. - }) = segments.first(); - if let Some( - Node::Item( - Item { - kind: ItemKind::Trait(_, _, _, self_bounds, _), - .. } - ) - ) = cx.tcx.hir().get_if_local(*def_id); - then { - if self_bounds_map.is_empty() { - for bound in *self_bounds { - let Some((self_res, self_segments, _)) = get_trait_info_from_bound(bound) else { continue }; - self_bounds_map.insert(self_res, self_segments); - } + if let WherePredicate::BoundPredicate(ref bound_predicate) = predicate + && bound_predicate.origin != PredicateOrigin::ImplTrait + && !bound_predicate.span.from_expansion() + && let TyKind::Path(QPath::Resolved(_, Path { segments, .. })) = bound_predicate.bounded_ty.kind + && let Some(PathSegment { + res: Res::SelfTyParam { trait_: def_id }, + .. + }) = segments.first() + && let Some(Node::Item(Item { + kind: ItemKind::Trait(_, _, _, self_bounds, _), + .. + })) = cx.tcx.hir().get_if_local(*def_id) + { + if self_bounds_map.is_empty() { + for bound in *self_bounds { + let Some((self_res, self_segments, _)) = get_trait_info_from_bound(bound) else { + continue; + }; + self_bounds_map.insert(self_res, self_segments); } + } - bound_predicate - .bounds - .iter() - .filter_map(get_trait_info_from_bound) - .for_each(|(trait_item_res, trait_item_segments, span)| { - if let Some(self_segments) = self_bounds_map.get(&trait_item_res) { - if SpanlessEq::new(cx).eq_path_segments(self_segments, trait_item_segments) { - span_lint_and_help( - cx, - TRAIT_DUPLICATION_IN_BOUNDS, - span, - "this trait bound is already specified in trait declaration", - None, - "consider removing this trait bound", - ); - } + bound_predicate + .bounds + .iter() + .filter_map(get_trait_info_from_bound) + .for_each(|(trait_item_res, trait_item_segments, span)| { + if let Some(self_segments) = self_bounds_map.get(&trait_item_res) { + if SpanlessEq::new(cx).eq_path_segments(self_segments, trait_item_segments) { + span_lint_and_help( + cx, + TRAIT_DUPLICATION_IN_BOUNDS, + span, + "this trait bound is already specified in trait declaration", + None, + "consider removing this trait bound", + ); } - }); - } + } + }); } } } fn check_ty(&mut self, cx: &LateContext<'tcx>, ty: &'tcx Ty<'tcx>) { - if_chain! { - if let TyKind::Ref(.., mut_ty) = &ty.kind; - if let TyKind::TraitObject(bounds, ..) = mut_ty.ty.kind; - if bounds.len() > 2; - then { - - // Build up a hash of every trait we've seen - // When we see a trait for the first time, add it to unique_traits - // so we can later use it to build a string of all traits exactly once, without duplicates + if let TyKind::Ref(.., mut_ty) = &ty.kind + && let TyKind::TraitObject(bounds, ..) = mut_ty.ty.kind + && bounds.len() > 2 + { + // Build up a hash of every trait we've seen + // When we see a trait for the first time, add it to unique_traits + // so we can later use it to build a string of all traits exactly once, without duplicates - let mut seen_def_ids = FxHashSet::default(); - let mut unique_traits = Vec::new(); + let mut seen_def_ids = FxHashSet::default(); + let mut unique_traits = Vec::new(); - // Iterate the bounds and add them to our seen hash - // If we haven't yet seen it, add it to the fixed traits - for bound in bounds { - let Some(def_id) = bound.trait_ref.trait_def_id() else { continue; }; + // Iterate the bounds and add them to our seen hash + // If we haven't yet seen it, add it to the fixed traits + for bound in bounds { + let Some(def_id) = bound.trait_ref.trait_def_id() else { + continue; + }; - let new_trait = seen_def_ids.insert(def_id); + let new_trait = seen_def_ids.insert(def_id); - if new_trait { - unique_traits.push(bound); - } + if new_trait { + unique_traits.push(bound); } + } - // If the number of unique traits isn't the same as the number of traits in the bounds, - // there must be 1 or more duplicates - if bounds.len() != unique_traits.len() { - let mut bounds_span = bounds[0].span; - - for bound in bounds.iter().skip(1) { - bounds_span = bounds_span.to(bound.span); - } - - let fixed_trait_snippet = unique_traits - .iter() - .filter_map(|b| snippet_opt(cx, b.span)) - .collect::<Vec<_>>() - .join(" + "); + // If the number of unique traits isn't the same as the number of traits in the bounds, + // there must be 1 or more duplicates + if bounds.len() != unique_traits.len() { + let mut bounds_span = bounds[0].span; - span_lint_and_sugg( - cx, - TRAIT_DUPLICATION_IN_BOUNDS, - bounds_span, - "this trait bound is already specified in trait declaration", - "try", - fixed_trait_snippet, - Applicability::MaybeIncorrect, - ); + for bound in bounds.iter().skip(1) { + bounds_span = bounds_span.to(bound.span); } + + let fixed_trait_snippet = unique_traits + .iter() + .filter_map(|b| snippet_opt(cx, b.span)) + .collect::<Vec<_>>() + .join(" + "); + + span_lint_and_sugg( + cx, + TRAIT_DUPLICATION_IN_BOUNDS, + bounds_span, + "this trait bound is already specified in trait declaration", + "try", + fixed_trait_snippet, + Applicability::MaybeIncorrect, + ); } } } @@ -267,36 +263,38 @@ impl TraitBounds { let mut map: UnhashMap<SpanlessTy<'_, '_>, Vec<&GenericBound<'_>>> = UnhashMap::default(); let mut applicability = Applicability::MaybeIncorrect; for bound in gen.predicates { - if_chain! { - if let WherePredicate::BoundPredicate(ref p) = bound; - if p.origin != PredicateOrigin::ImplTrait; - if p.bounds.len() as u64 <= self.max_trait_bounds; - if !p.span.from_expansion(); - let bounds = p.bounds.iter().filter(|b| !self.cannot_combine_maybe_bound(cx, b)).collect::<Vec<_>>(); - if !bounds.is_empty(); - if let Some(ref v) = map.insert(SpanlessTy { ty: p.bounded_ty, cx }, bounds); - if !is_from_proc_macro(cx, p.bounded_ty); - then { - let trait_bounds = v - .iter() - .copied() - .chain(p.bounds.iter()) - .filter_map(get_trait_info_from_bound) - .map(|(_, _, span)| snippet_with_applicability(cx, span, "..", &mut applicability)) - .join(" + "); - let hint_string = format!( - "consider combining the bounds: `{}: {trait_bounds}`", - snippet(cx, p.bounded_ty.span, "_"), - ); - span_lint_and_help( - cx, - TYPE_REPETITION_IN_BOUNDS, - p.span, - "this type has already been used as a bound predicate", - None, - &hint_string, - ); - } + if let WherePredicate::BoundPredicate(ref p) = bound + && p.origin != PredicateOrigin::ImplTrait + && p.bounds.len() as u64 <= self.max_trait_bounds + && !p.span.from_expansion() + && let bounds = p + .bounds + .iter() + .filter(|b| !self.cannot_combine_maybe_bound(cx, b)) + .collect::<Vec<_>>() + && !bounds.is_empty() + && let Some(ref v) = map.insert(SpanlessTy { ty: p.bounded_ty, cx }, bounds) + && !is_from_proc_macro(cx, p.bounded_ty) + { + let trait_bounds = v + .iter() + .copied() + .chain(p.bounds.iter()) + .filter_map(get_trait_info_from_bound) + .map(|(_, _, span)| snippet_with_applicability(cx, span, "..", &mut applicability)) + .join(" + "); + let hint_string = format!( + "consider combining the bounds: `{}: {trait_bounds}`", + snippet(cx, p.bounded_ty.span, "_"), + ); + span_lint_and_help( + cx, + TYPE_REPETITION_IN_BOUNDS, + p.span, + "this type has already been used as a bound predicate", + None, + &hint_string, + ); } } } @@ -318,15 +316,19 @@ fn check_trait_bound_duplication(cx: &LateContext<'_>, gen: &'_ Generics<'_>) { .predicates .iter() .filter_map(|pred| { - if_chain! { - if pred.in_where_clause(); - if let WherePredicate::BoundPredicate(bound_predicate) = pred; - if let TyKind::Path(QPath::Resolved(_, path)) = bound_predicate.bounded_ty.kind; - then { - return Some( - rollup_traits(cx, bound_predicate.bounds, "these where clauses contain repeated elements") - .into_iter().map(|(trait_ref, _)| (path.res, trait_ref))) - } + if pred.in_where_clause() + && let WherePredicate::BoundPredicate(bound_predicate) = pred + && let TyKind::Path(QPath::Resolved(_, path)) = bound_predicate.bounded_ty.kind + { + return Some( + rollup_traits( + cx, + bound_predicate.bounds, + "these where clauses contain repeated elements", + ) + .into_iter() + .map(|(trait_ref, _)| (path.res, trait_ref)), + ); } None }) @@ -340,25 +342,23 @@ fn check_trait_bound_duplication(cx: &LateContext<'_>, gen: &'_ Generics<'_>) { // compare trait bounds keyed by generic name and comparable trait to collected where // predicates eg. (T, Clone) for predicate in gen.predicates.iter().filter(|pred| !pred.in_where_clause()) { - if_chain! { - if let WherePredicate::BoundPredicate(bound_predicate) = predicate; - if bound_predicate.origin != PredicateOrigin::ImplTrait; - if !bound_predicate.span.from_expansion(); - if let TyKind::Path(QPath::Resolved(_, path)) = bound_predicate.bounded_ty.kind; - then { - let traits = rollup_traits(cx, bound_predicate.bounds, "these bounds contain repeated elements"); - for (trait_ref, span) in traits { - let key = (path.res, trait_ref); - if where_predicates.contains(&key) { - span_lint_and_help( - cx, - TRAIT_DUPLICATION_IN_BOUNDS, - span, - "this trait bound is already specified in the where clause", - None, - "consider removing this trait bound", - ); - } + if let WherePredicate::BoundPredicate(bound_predicate) = predicate + && bound_predicate.origin != PredicateOrigin::ImplTrait + && !bound_predicate.span.from_expansion() + && let TyKind::Path(QPath::Resolved(_, path)) = bound_predicate.bounded_ty.kind + { + let traits = rollup_traits(cx, bound_predicate.bounds, "these bounds contain repeated elements"); + for (trait_ref, span) in traits { + let key = (path.res, trait_ref); + if where_predicates.contains(&key) { + span_lint_and_help( + cx, + TRAIT_DUPLICATION_IN_BOUNDS, + span, + "this trait bound is already specified in the where clause", + None, + "consider removing this trait bound", + ); } } } @@ -401,10 +401,10 @@ fn into_comparable_trait_ref(trait_ref: &TraitRef<'_>) -> ComparableTraitRef { .filter_map(|segment| { // get trait bound type arguments Some(segment.args?.args.iter().filter_map(|arg| { - if_chain! { - if let GenericArg::Type(ty) = arg; - if let TyKind::Path(QPath::Resolved(_, path)) = ty.kind; - then { return Some(path.res) } + if let GenericArg::Type(ty) = arg + && let TyKind::Path(QPath::Resolved(_, path)) = ty.kind + { + return Some(path.res); } None })) @@ -444,27 +444,24 @@ fn rollup_traits(cx: &LateContext<'_>, bounds: &[GenericBound<'_>], msg: &str) - comparable_bounds[i] = (k, v); } - if_chain! { - if repeated_res; - if let [first_trait, .., last_trait] = bounds; - then { - let all_trait_span = first_trait.span().to(last_trait.span()); - - let traits = comparable_bounds.iter() - .filter_map(|&(_, span)| snippet_opt(cx, span)) - .collect::<Vec<_>>(); - let traits = traits.join(" + "); - - span_lint_and_sugg( - cx, - TRAIT_DUPLICATION_IN_BOUNDS, - all_trait_span, - msg, - "try", - traits, - Applicability::MachineApplicable - ); - } + if repeated_res && let [first_trait, .., last_trait] = bounds { + let all_trait_span = first_trait.span().to(last_trait.span()); + + let traits = comparable_bounds + .iter() + .filter_map(|&(_, span)| snippet_opt(cx, span)) + .collect::<Vec<_>>(); + let traits = traits.join(" + "); + + span_lint_and_sugg( + cx, + TRAIT_DUPLICATION_IN_BOUNDS, + all_trait_span, + msg, + "try", + traits, + Applicability::MachineApplicable, + ); } comparable_bounds diff --git a/src/tools/clippy/clippy_lints/src/transmute/mod.rs b/src/tools/clippy/clippy_lints/src/transmute/mod.rs index 6eec40cb5..95a92afea 100644 --- a/src/tools/clippy/clippy_lints/src/transmute/mod.rs +++ b/src/tools/clippy/clippy_lints/src/transmute/mod.rs @@ -19,10 +19,9 @@ mod wrong_transmute; use clippy_config::msrvs::Msrv; use clippy_utils::in_constant; -use if_chain::if_chain; use rustc_hir::{Expr, ExprKind, QPath}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::symbol::sym; declare_clippy_lint! { @@ -494,51 +493,47 @@ impl Transmute { } impl<'tcx> LateLintPass<'tcx> for Transmute { fn check_expr(&mut self, cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) { - if_chain! { - if let ExprKind::Call(path_expr, [arg]) = e.kind; - if let ExprKind::Path(QPath::Resolved(None, path)) = path_expr.kind; - if let Some(def_id) = path.res.opt_def_id(); - if cx.tcx.is_diagnostic_item(sym::transmute, def_id); - then { - // Avoid suggesting non-const operations in const contexts: - // - from/to bits (https://github.com/rust-lang/rust/issues/73736) - // - dereferencing raw pointers (https://github.com/rust-lang/rust/issues/51911) - // - char conversions (https://github.com/rust-lang/rust/issues/89259) - let const_context = in_constant(cx, e.hir_id); + if let ExprKind::Call(path_expr, [arg]) = e.kind + && let ExprKind::Path(QPath::Resolved(None, path)) = path_expr.kind + && let Some(def_id) = path.res.opt_def_id() + && cx.tcx.is_diagnostic_item(sym::transmute, def_id) + { + // Avoid suggesting non-const operations in const contexts: + // - from/to bits (https://github.com/rust-lang/rust/issues/73736) + // - dereferencing raw pointers (https://github.com/rust-lang/rust/issues/51911) + // - char conversions (https://github.com/rust-lang/rust/issues/89259) + let const_context = in_constant(cx, e.hir_id); - let (from_ty, from_ty_adjusted) = match cx.typeck_results().expr_adjustments(arg) { - [] => (cx.typeck_results().expr_ty(arg), false), - [.., a] => (a.target, true), - }; - // Adjustments for `to_ty` happen after the call to `transmute`, so don't use them. - let to_ty = cx.typeck_results().expr_ty(e); + let (from_ty, from_ty_adjusted) = match cx.typeck_results().expr_adjustments(arg) { + [] => (cx.typeck_results().expr_ty(arg), false), + [.., a] => (a.target, true), + }; + // Adjustments for `to_ty` happen after the call to `transmute`, so don't use them. + let to_ty = cx.typeck_results().expr_ty(e); - // If useless_transmute is triggered, the other lints can be skipped. - if useless_transmute::check(cx, e, from_ty, to_ty, arg) { - return; - } + // If useless_transmute is triggered, the other lints can be skipped. + if useless_transmute::check(cx, e, from_ty, to_ty, arg) { + return; + } - let linted = wrong_transmute::check(cx, e, from_ty, to_ty) - | crosspointer_transmute::check(cx, e, from_ty, to_ty) - | transmuting_null::check(cx, e, arg, to_ty) - | transmute_null_to_fn::check(cx, e, arg, to_ty) - | transmute_ptr_to_ref::check(cx, e, from_ty, to_ty, arg, path, &self.msrv) - | transmute_int_to_char::check(cx, e, from_ty, to_ty, arg, const_context) - | transmute_ref_to_ref::check(cx, e, from_ty, to_ty, arg, const_context) - | transmute_ptr_to_ptr::check(cx, e, from_ty, to_ty, arg) - | transmute_int_to_bool::check(cx, e, from_ty, to_ty, arg) - | transmute_int_to_float::check(cx, e, from_ty, to_ty, arg, const_context) - | transmute_int_to_non_zero::check(cx, e, from_ty, to_ty, arg) - | transmute_float_to_int::check(cx, e, from_ty, to_ty, arg, const_context) - | transmute_num_to_bytes::check(cx, e, from_ty, to_ty, arg, const_context) - | ( - unsound_collection_transmute::check(cx, e, from_ty, to_ty) - || transmute_undefined_repr::check(cx, e, from_ty, to_ty) - ); + let linted = wrong_transmute::check(cx, e, from_ty, to_ty) + | crosspointer_transmute::check(cx, e, from_ty, to_ty) + | transmuting_null::check(cx, e, arg, to_ty) + | transmute_null_to_fn::check(cx, e, arg, to_ty) + | transmute_ptr_to_ref::check(cx, e, from_ty, to_ty, arg, path, &self.msrv) + | transmute_int_to_char::check(cx, e, from_ty, to_ty, arg, const_context) + | transmute_ref_to_ref::check(cx, e, from_ty, to_ty, arg, const_context) + | transmute_ptr_to_ptr::check(cx, e, from_ty, to_ty, arg) + | transmute_int_to_bool::check(cx, e, from_ty, to_ty, arg) + | transmute_int_to_float::check(cx, e, from_ty, to_ty, arg, const_context) + | transmute_int_to_non_zero::check(cx, e, from_ty, to_ty, arg) + | transmute_float_to_int::check(cx, e, from_ty, to_ty, arg, const_context) + | transmute_num_to_bytes::check(cx, e, from_ty, to_ty, arg, const_context) + | (unsound_collection_transmute::check(cx, e, from_ty, to_ty) + || transmute_undefined_repr::check(cx, e, from_ty, to_ty)); - if !linted { - transmutes_expressible_as_ptr_casts::check(cx, e, from_ty, from_ty_adjusted, to_ty, arg); - } + if !linted { + transmutes_expressible_as_ptr_casts::check(cx, e, from_ty, from_ty_adjusted, to_ty, arg); } } } diff --git a/src/tools/clippy/clippy_lints/src/transmute/transmute_float_to_int.rs b/src/tools/clippy/clippy_lints/src/transmute/transmute_float_to_int.rs index 5ecba512b..aef520923 100644 --- a/src/tools/clippy/clippy_lints/src/transmute/transmute_float_to_int.rs +++ b/src/tools/clippy/clippy_lints/src/transmute/transmute_float_to_int.rs @@ -1,7 +1,6 @@ use super::TRANSMUTE_FLOAT_TO_INT; use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::sugg; -use if_chain::if_chain; use rustc_ast as ast; use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind, UnOp}; @@ -32,17 +31,15 @@ pub(super) fn check<'tcx>( arg = inner_expr; } - if_chain! { + if let ExprKind::Lit(lit) = &arg.kind // if the expression is a float literal and it is unsuffixed then // add a suffix so the suggestion is valid and unambiguous - if let ExprKind::Lit(lit) = &arg.kind; - if let ast::LitKind::Float(_, ast::LitFloatType::Unsuffixed) = lit.node; - then { - let op = format!("{sugg}{}", float_ty.name_str()).into(); - match sugg { - sugg::Sugg::MaybeParen(_) => sugg = sugg::Sugg::MaybeParen(op), - _ => sugg = sugg::Sugg::NonParen(op) - } + && let ast::LitKind::Float(_, ast::LitFloatType::Unsuffixed) = lit.node + { + let op = format!("{sugg}{}", float_ty.name_str()).into(); + match sugg { + sugg::Sugg::MaybeParen(_) => sugg = sugg::Sugg::MaybeParen(op), + _ => sugg = sugg::Sugg::NonParen(op), } } diff --git a/src/tools/clippy/clippy_lints/src/transmute/transmute_ref_to_ref.rs b/src/tools/clippy/clippy_lints/src/transmute/transmute_ref_to_ref.rs index ea9ad9961..98e9ea2d7 100644 --- a/src/tools/clippy/clippy_lints/src/transmute/transmute_ref_to_ref.rs +++ b/src/tools/clippy/clippy_lints/src/transmute/transmute_ref_to_ref.rs @@ -2,7 +2,6 @@ use super::{TRANSMUTE_BYTES_TO_STR, TRANSMUTE_PTR_TO_PTR}; use clippy_utils::diagnostics::{span_lint_and_sugg, span_lint_and_then}; use clippy_utils::source::snippet; use clippy_utils::sugg; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{Expr, Mutability}; use rustc_lint::LateContext; @@ -21,68 +20,59 @@ pub(super) fn check<'tcx>( let mut triggered = false; if let (ty::Ref(_, ty_from, from_mutbl), ty::Ref(_, ty_to, to_mutbl)) = (&from_ty.kind(), &to_ty.kind()) { - if_chain! { - if let ty::Slice(slice_ty) = *ty_from.kind(); - if ty_to.is_str(); - if let ty::Uint(ty::UintTy::U8) = slice_ty.kind(); - if from_mutbl == to_mutbl; - then { - let postfix = if *from_mutbl == Mutability::Mut { - "_mut" - } else { - "" - }; + if let ty::Slice(slice_ty) = *ty_from.kind() + && ty_to.is_str() + && let ty::Uint(ty::UintTy::U8) = slice_ty.kind() + && from_mutbl == to_mutbl + { + let postfix = if *from_mutbl == Mutability::Mut { "_mut" } else { "" }; - let snippet = snippet(cx, arg.span, ".."); + let snippet = snippet(cx, arg.span, ".."); - span_lint_and_sugg( - cx, - TRANSMUTE_BYTES_TO_STR, - e.span, - &format!("transmute from a `{from_ty}` to a `{to_ty}`"), - "consider using", - if const_context { - format!("std::str::from_utf8_unchecked{postfix}({snippet})") - } else { - format!("std::str::from_utf8{postfix}({snippet}).unwrap()") - }, - Applicability::MaybeIncorrect, - ); - triggered = true; - } else { - if (cx.tcx.erase_regions(from_ty) != cx.tcx.erase_regions(to_ty)) - && !const_context { - span_lint_and_then( - cx, - TRANSMUTE_PTR_TO_PTR, - e.span, - "transmute from a reference to a reference", - |diag| if let Some(arg) = sugg::Sugg::hir_opt(cx, arg) { - let ty_from_and_mut = ty::TypeAndMut { - ty: *ty_from, - mutbl: *from_mutbl - }; - let ty_to_and_mut = ty::TypeAndMut { ty: *ty_to, mutbl: *to_mutbl }; - let sugg_paren = arg - .as_ty(Ty::new_ptr(cx.tcx,ty_from_and_mut)) - .as_ty(Ty::new_ptr(cx.tcx,ty_to_and_mut)); - let sugg = if *to_mutbl == Mutability::Mut { - sugg_paren.mut_addr_deref() - } else { - sugg_paren.addr_deref() - }; - diag.span_suggestion( - e.span, - "try", - sugg, - Applicability::Unspecified, - ); - }, - ); + span_lint_and_sugg( + cx, + TRANSMUTE_BYTES_TO_STR, + e.span, + &format!("transmute from a `{from_ty}` to a `{to_ty}`"), + "consider using", + if const_context { + format!("std::str::from_utf8_unchecked{postfix}({snippet})") + } else { + format!("std::str::from_utf8{postfix}({snippet}).unwrap()") + }, + Applicability::MaybeIncorrect, + ); + triggered = true; + } else if (cx.tcx.erase_regions(from_ty) != cx.tcx.erase_regions(to_ty)) && !const_context { + span_lint_and_then( + cx, + TRANSMUTE_PTR_TO_PTR, + e.span, + "transmute from a reference to a reference", + |diag| { + if let Some(arg) = sugg::Sugg::hir_opt(cx, arg) { + let ty_from_and_mut = ty::TypeAndMut { + ty: *ty_from, + mutbl: *from_mutbl, + }; + let ty_to_and_mut = ty::TypeAndMut { + ty: *ty_to, + mutbl: *to_mutbl, + }; + let sugg_paren = arg + .as_ty(Ty::new_ptr(cx.tcx, ty_from_and_mut)) + .as_ty(Ty::new_ptr(cx.tcx, ty_to_and_mut)); + let sugg = if *to_mutbl == Mutability::Mut { + sugg_paren.mut_addr_deref() + } else { + sugg_paren.addr_deref() + }; + diag.span_suggestion(e.span, "try", sugg, Applicability::Unspecified); + } + }, + ); - triggered = true; - } - } + triggered = true; } } diff --git a/src/tools/clippy/clippy_lints/src/transmute/transmute_undefined_repr.rs b/src/tools/clippy/clippy_lints/src/transmute/transmute_undefined_repr.rs index 7c2223ca3..a65bc0ce4 100644 --- a/src/tools/clippy/clippy_lints/src/transmute/transmute_undefined_repr.rs +++ b/src/tools/clippy/clippy_lints/src/transmute/transmute_undefined_repr.rs @@ -299,14 +299,12 @@ fn reduce_ty<'tcx>(cx: &LateContext<'tcx>, mut ty: Ty<'tcx>) -> ReducedTy<'tcx> } fn is_zero_sized_ty<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>) -> bool { - if_chain! { - if let Ok(ty) = cx.tcx.try_normalize_erasing_regions(cx.param_env, ty); - if let Ok(layout) = cx.tcx.layout_of(cx.param_env.and(ty)); - then { - layout.layout.size().bytes() == 0 - } else { - false - } + if let Ok(ty) = cx.tcx.try_normalize_erasing_regions(cx.param_env, ty) + && let Ok(layout) = cx.tcx.layout_of(cx.param_env.and(ty)) + { + layout.layout.size().bytes() == 0 + } else { + false } } diff --git a/src/tools/clippy/clippy_lints/src/tuple_array_conversions.rs b/src/tools/clippy/clippy_lints/src/tuple_array_conversions.rs index 642e39e82..e1cd82e18 100644 --- a/src/tools/clippy/clippy_lints/src/tuple_array_conversions.rs +++ b/src/tools/clippy/clippy_lints/src/tuple_array_conversions.rs @@ -8,7 +8,7 @@ use rustc_hir::{Expr, ExprKind, Node, PatKind}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; use rustc_middle::ty::{self, Ty}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use std::iter::once; use std::ops::ControlFlow; diff --git a/src/tools/clippy/clippy_lints/src/types/borrowed_box.rs b/src/tools/clippy/clippy_lints/src/types/borrowed_box.rs index 306ca5724..801e88626 100644 --- a/src/tools/clippy/clippy_lints/src/types/borrowed_box.rs +++ b/src/tools/clippy/clippy_lints/src/types/borrowed_box.rs @@ -1,6 +1,5 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{ self as hir, GenericArg, GenericBounds, GenericParamKind, HirId, Lifetime, MutTy, Mutability, Node, QPath, TyKind, @@ -15,66 +14,64 @@ pub(super) fn check(cx: &LateContext<'_>, hir_ty: &hir::Ty<'_>, lt: &Lifetime, m TyKind::Path(ref qpath) => { let hir_id = mut_ty.ty.hir_id; let def = cx.qpath_res(qpath, hir_id); - if_chain! { - if let Some(def_id) = def.opt_def_id(); - if Some(def_id) == cx.tcx.lang_items().owned_box(); - if let QPath::Resolved(None, path) = *qpath; - if let [ref bx] = *path.segments; - if let Some(params) = bx.args; - if params.parenthesized == hir::GenericArgsParentheses::No; - if let Some(inner) = params.args.iter().find_map(|arg| match arg { + if let Some(def_id) = def.opt_def_id() + && Some(def_id) == cx.tcx.lang_items().owned_box() + && let QPath::Resolved(None, path) = *qpath + && let [ref bx] = *path.segments + && let Some(params) = bx.args + && params.parenthesized == hir::GenericArgsParentheses::No + && let Some(inner) = params.args.iter().find_map(|arg| match arg { GenericArg::Type(ty) => Some(ty), _ => None, - }); - then { - if is_any_trait(cx, inner) { - // Ignore `Box<Any>` types; see issue #1884 for details. - return false; - } - - let ltopt = if lt.is_anonymous() { - String::new() - } else { - format!("{} ", lt.ident.as_str()) - }; + }) + { + if is_any_trait(cx, inner) { + // Ignore `Box<Any>` types; see issue #1884 for details. + return false; + } - if mut_ty.mutbl == Mutability::Mut { - // Ignore `&mut Box<T>` types; see issue #2907 for - // details. - return false; - } + let ltopt = if lt.is_anonymous() { + String::new() + } else { + format!("{} ", lt.ident.as_str()) + }; - // When trait objects or opaque types have lifetime or auto-trait bounds, - // we need to add parentheses to avoid a syntax error due to its ambiguity. - // Originally reported as the issue #3128. - let inner_snippet = snippet(cx, inner.span, ".."); - let suggestion = match &inner.kind { - TyKind::TraitObject(bounds, lt_bound, _) if bounds.len() > 1 || !lt_bound.is_elided() => { - format!("&{ltopt}({})", &inner_snippet) - }, - TyKind::Path(qpath) - if get_bounds_if_impl_trait(cx, qpath, inner.hir_id) - .map_or(false, |bounds| bounds.len() > 1) => - { - format!("&{ltopt}({})", &inner_snippet) - }, - _ => format!("&{ltopt}{}", &inner_snippet), - }; - span_lint_and_sugg( - cx, - BORROWED_BOX, - hir_ty.span, - "you seem to be trying to use `&Box<T>`. Consider using just `&T`", - "try", - suggestion, - // To make this `MachineApplicable`, at least one needs to check if it isn't a trait item - // because the trait impls of it will break otherwise; - // and there may be other cases that result in invalid code. - // For example, type coercion doesn't work nicely. - Applicability::Unspecified, - ); - return true; + if mut_ty.mutbl == Mutability::Mut { + // Ignore `&mut Box<T>` types; see issue #2907 for + // details. + return false; } + + // When trait objects or opaque types have lifetime or auto-trait bounds, + // we need to add parentheses to avoid a syntax error due to its ambiguity. + // Originally reported as the issue #3128. + let inner_snippet = snippet(cx, inner.span, ".."); + let suggestion = match &inner.kind { + TyKind::TraitObject(bounds, lt_bound, _) if bounds.len() > 1 || !lt_bound.is_elided() => { + format!("&{ltopt}({})", &inner_snippet) + }, + TyKind::Path(qpath) + if get_bounds_if_impl_trait(cx, qpath, inner.hir_id) + .map_or(false, |bounds| bounds.len() > 1) => + { + format!("&{ltopt}({})", &inner_snippet) + }, + _ => format!("&{ltopt}{}", &inner_snippet), + }; + span_lint_and_sugg( + cx, + BORROWED_BOX, + hir_ty.span, + "you seem to be trying to use `&Box<T>`. Consider using just `&T`", + "try", + suggestion, + // To make this `MachineApplicable`, at least one needs to check if it isn't a trait item + // because the trait impls of it will break otherwise; + // and there may be other cases that result in invalid code. + // For example, type coercion doesn't work nicely. + Applicability::Unspecified, + ); + return true; }; false }, @@ -84,33 +81,29 @@ pub(super) fn check(cx: &LateContext<'_>, hir_ty: &hir::Ty<'_>, lt: &Lifetime, m // Returns true if given type is `Any` trait. fn is_any_trait(cx: &LateContext<'_>, t: &hir::Ty<'_>) -> bool { - if_chain! { - if let TyKind::TraitObject(traits, ..) = t.kind; - if !traits.is_empty(); - if let Some(trait_did) = traits[0].trait_ref.trait_def_id(); + if let TyKind::TraitObject(traits, ..) = t.kind + && !traits.is_empty() + && let Some(trait_did) = traits[0].trait_ref.trait_def_id() // Only Send/Sync can be used as additional traits, so it is enough to // check only the first trait. - if cx.tcx.is_diagnostic_item(sym::Any, trait_did); - then { - return true; - } + && cx.tcx.is_diagnostic_item(sym::Any, trait_did) + { + return true; } false } fn get_bounds_if_impl_trait<'tcx>(cx: &LateContext<'tcx>, qpath: &QPath<'_>, id: HirId) -> Option<GenericBounds<'tcx>> { - if_chain! { - if let Some(did) = cx.qpath_res(qpath, id).opt_def_id(); - if let Some(Node::GenericParam(generic_param)) = cx.tcx.hir().get_if_local(did); - if let GenericParamKind::Type { synthetic, .. } = generic_param.kind; - if synthetic; - if let Some(generics) = cx.tcx.hir().get_generics(id.owner.def_id); - if let Some(pred) = generics.bounds_for_param(did.expect_local()).next(); - then { - Some(pred.bounds) - } else { - None - } + if let Some(did) = cx.qpath_res(qpath, id).opt_def_id() + && let Some(Node::GenericParam(generic_param)) = cx.tcx.hir().get_if_local(did) + && let GenericParamKind::Type { synthetic, .. } = generic_param.kind + && synthetic + && let Some(generics) = cx.tcx.hir().get_generics(id.owner.def_id) + && let Some(pred) = generics.bounds_for_param(did.expect_local()).next() + { + Some(pred.bounds) + } else { + None } } diff --git a/src/tools/clippy/clippy_lints/src/types/box_collection.rs b/src/tools/clippy/clippy_lints/src/types/box_collection.rs index 4a5a94f26..fc3420af0 100644 --- a/src/tools/clippy/clippy_lints/src/types/box_collection.rs +++ b/src/tools/clippy/clippy_lints/src/types/box_collection.rs @@ -8,30 +8,26 @@ use rustc_span::{sym, Symbol}; use super::BOX_COLLECTION; pub(super) fn check(cx: &LateContext<'_>, hir_ty: &hir::Ty<'_>, qpath: &QPath<'_>, def_id: DefId) -> bool { - if_chain! { - if Some(def_id) == cx.tcx.lang_items().owned_box(); - if let Some(item_type) = get_std_collection(cx, qpath); - then { - let generic = match item_type { - sym::String => "", - _ => "<..>", - }; + if Some(def_id) == cx.tcx.lang_items().owned_box() + && let Some(item_type) = get_std_collection(cx, qpath) + { + let generic = match item_type { + sym::String => "", + _ => "<..>", + }; - let box_content = format!("{item_type}{generic}"); - span_lint_and_help( - cx, - BOX_COLLECTION, - hir_ty.span, - &format!( - "you seem to be trying to use `Box<{box_content}>`. Consider using just `{box_content}`"), - None, - &format!( - "`{box_content}` is already on the heap, `Box<{box_content}>` makes an extra allocation") - ); - true - } else { - false - } + let box_content = format!("{item_type}{generic}"); + span_lint_and_help( + cx, + BOX_COLLECTION, + hir_ty.span, + &format!("you seem to be trying to use `Box<{box_content}>`. Consider using just `{box_content}`"), + None, + &format!("`{box_content}` is already on the heap, `Box<{box_content}>` makes an extra allocation"), + ); + true + } else { + false } } diff --git a/src/tools/clippy/clippy_lints/src/types/mod.rs b/src/tools/clippy/clippy_lints/src/types/mod.rs index 6a6160c49..81efec653 100644 --- a/src/tools/clippy/clippy_lints/src/types/mod.rs +++ b/src/tools/clippy/clippy_lints/src/types/mod.rs @@ -16,7 +16,7 @@ use rustc_hir::{ TraitItemKind, TyKind, }; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::def_id::LocalDefId; use rustc_span::Span; @@ -321,10 +321,10 @@ impl<'tcx> LateLintPass<'tcx> for Types { _: Span, def_id: LocalDefId, ) { - let is_in_trait_impl = if let Some(hir::Node::Item(item)) = cx.tcx.hir().find_by_def_id( + let is_in_trait_impl = if let Some(hir::Node::Item(item)) = cx.tcx.opt_hir_node_by_def_id( cx.tcx .hir() - .get_parent_item(cx.tcx.hir().local_def_id_to_hir_id(def_id)) + .get_parent_item(cx.tcx.local_def_id_to_hir_id(def_id)) .def_id, ) { matches!(item.kind, ItemKind::Impl(hir::Impl { of_trait: Some(_), .. })) @@ -368,8 +368,7 @@ impl<'tcx> LateLintPass<'tcx> for Types { ImplItemKind::Const(ty, _) => { let is_in_trait_impl = if let Some(hir::Node::Item(item)) = cx .tcx - .hir() - .find_by_def_id(cx.tcx.hir().get_parent_item(item.hir_id()).def_id) + .opt_hir_node_by_def_id(cx.tcx.hir().get_parent_item(item.hir_id()).def_id) { matches!(item.kind, ItemKind::Impl(hir::Impl { of_trait: Some(_), .. })) } else { @@ -490,7 +489,7 @@ impl Types { // All lints that are being checked in this block are guarded by // the `avoid_breaking_exported_api` configuration. When adding a // new lint, please also add the name to the configuration documentation - // in `clippy_lints::utils::conf.rs` + // in `clippy_config::conf` let mut triggered = false; triggered |= box_collection::check(cx, hir_ty, qpath, def_id); diff --git a/src/tools/clippy/clippy_lints/src/types/option_option.rs b/src/tools/clippy/clippy_lints/src/types/option_option.rs index 60622903a..d12d14f2b 100644 --- a/src/tools/clippy/clippy_lints/src/types/option_option.rs +++ b/src/tools/clippy/clippy_lints/src/types/option_option.rs @@ -1,6 +1,5 @@ use clippy_utils::diagnostics::span_lint; use clippy_utils::{path_def_id, qpath_generic_tys}; -use if_chain::if_chain; use rustc_hir::def_id::DefId; use rustc_hir::{self as hir, QPath}; use rustc_lint::LateContext; @@ -9,21 +8,19 @@ use rustc_span::symbol::sym; use super::OPTION_OPTION; pub(super) fn check(cx: &LateContext<'_>, hir_ty: &hir::Ty<'_>, qpath: &QPath<'_>, def_id: DefId) -> bool { - if_chain! { - if cx.tcx.is_diagnostic_item(sym::Option, def_id); - if let Some(arg) = qpath_generic_tys(qpath).next(); - if path_def_id(cx, arg) == Some(def_id); - then { - span_lint( - cx, - OPTION_OPTION, - hir_ty.span, - "consider using `Option<T>` instead of `Option<Option<T>>` or a custom \ - enum if you need to distinguish all 3 cases", - ); - true - } else { - false - } + if cx.tcx.is_diagnostic_item(sym::Option, def_id) + && let Some(arg) = qpath_generic_tys(qpath).next() + && path_def_id(cx, arg) == Some(def_id) + { + span_lint( + cx, + OPTION_OPTION, + hir_ty.span, + "consider using `Option<T>` instead of `Option<Option<T>>` or a custom \ + enum if you need to distinguish all 3 cases", + ); + true + } else { + false } } diff --git a/src/tools/clippy/clippy_lints/src/types/rc_mutex.rs b/src/tools/clippy/clippy_lints/src/types/rc_mutex.rs index a616c3e4e..afc319217 100644 --- a/src/tools/clippy/clippy_lints/src/types/rc_mutex.rs +++ b/src/tools/clippy/clippy_lints/src/types/rc_mutex.rs @@ -1,6 +1,5 @@ use clippy_utils::diagnostics::span_lint_and_help; use clippy_utils::{path_def_id, qpath_generic_tys}; -use if_chain::if_chain; use rustc_hir::def_id::DefId; use rustc_hir::{self as hir, QPath}; use rustc_lint::LateContext; @@ -9,22 +8,20 @@ use rustc_span::symbol::sym; use super::RC_MUTEX; pub(super) fn check(cx: &LateContext<'_>, hir_ty: &hir::Ty<'_>, qpath: &QPath<'_>, def_id: DefId) -> bool { - if_chain! { - if cx.tcx.is_diagnostic_item(sym::Rc, def_id) ; - if let Some(arg) = qpath_generic_tys(qpath).next(); - if let Some(id) = path_def_id(cx, arg); - if cx.tcx.is_diagnostic_item(sym::Mutex, id); - then { - span_lint_and_help( - cx, - RC_MUTEX, - hir_ty.span, - "usage of `Rc<Mutex<_>>`", - None, - "consider using `Rc<RefCell<_>>` or `Arc<Mutex<_>>` instead", - ); - return true; - } + if cx.tcx.is_diagnostic_item(sym::Rc, def_id) + && let Some(arg) = qpath_generic_tys(qpath).next() + && let Some(id) = path_def_id(cx, arg) + && cx.tcx.is_diagnostic_item(sym::Mutex, id) + { + span_lint_and_help( + cx, + RC_MUTEX, + hir_ty.span, + "usage of `Rc<Mutex<_>>`", + None, + "consider using `Rc<RefCell<_>>` or `Arc<Mutex<_>>` instead", + ); + return true; } false diff --git a/src/tools/clippy/clippy_lints/src/types/utils.rs b/src/tools/clippy/clippy_lints/src/types/utils.rs index 39469841b..0bca56b8d 100644 --- a/src/tools/clippy/clippy_lints/src/types/utils.rs +++ b/src/tools/clippy/clippy_lints/src/types/utils.rs @@ -1,22 +1,19 @@ use clippy_utils::last_path_segment; -use if_chain::if_chain; use rustc_hir::{GenericArg, GenericArgsParentheses, QPath, TyKind}; use rustc_lint::LateContext; use rustc_span::Span; pub(super) fn match_borrows_parameter(_cx: &LateContext<'_>, qpath: &QPath<'_>) -> Option<Span> { let last = last_path_segment(qpath); - if_chain! { - if let Some(params) = last.args; - if params.parenthesized == GenericArgsParentheses::No; - if let Some(ty) = params.args.iter().find_map(|arg| match arg { + if let Some(params) = last.args + && params.parenthesized == GenericArgsParentheses::No + && let Some(ty) = params.args.iter().find_map(|arg| match arg { GenericArg::Type(ty) => Some(ty), _ => None, - }); - if let TyKind::Ref(..) = ty.kind; - then { - return Some(ty.span); - } + }) + && let TyKind::Ref(..) = ty.kind + { + return Some(ty.span); } None } diff --git a/src/tools/clippy/clippy_lints/src/types/vec_box.rs b/src/tools/clippy/clippy_lints/src/types/vec_box.rs index decc183ad..9d5066199 100644 --- a/src/tools/clippy/clippy_lints/src/types/vec_box.rs +++ b/src/tools/clippy/clippy_lints/src/types/vec_box.rs @@ -1,7 +1,7 @@ use clippy_utils::diagnostics::span_lint_and_sugg; -use clippy_utils::last_path_segment; +use clippy_utils::paths::ALLOCATOR_GLOBAL; use clippy_utils::source::snippet; -use if_chain::if_chain; +use clippy_utils::{last_path_segment, match_def_path}; use rustc_errors::Applicability; use rustc_hir::def_id::DefId; use rustc_hir::{self as hir, GenericArg, QPath, TyKind}; @@ -21,43 +21,57 @@ pub(super) fn check( box_size_threshold: u64, ) -> bool { if cx.tcx.is_diagnostic_item(sym::Vec, def_id) { - if_chain! { + if let Some(last) = last_path_segment(qpath).args // Get the _ part of Vec<_> - if let Some(last) = last_path_segment(qpath).args; - if let Some(ty) = last.args.iter().find_map(|arg| match arg { - GenericArg::Type(ty) => Some(ty), - _ => None, - }); + && let Some(GenericArg::Type(ty)) = last.args.first() + // extract allocator from the Vec for later + && let vec_alloc_ty = last.args.get(1) // ty is now _ at this point - if let TyKind::Path(ref ty_qpath) = ty.kind; - let res = cx.qpath_res(ty_qpath, ty.hir_id); - if let Some(def_id) = res.opt_def_id(); - if Some(def_id) == cx.tcx.lang_items().owned_box(); + && let TyKind::Path(ref ty_qpath) = ty.kind + && let res = cx.qpath_res(ty_qpath, ty.hir_id) + && let Some(def_id) = res.opt_def_id() + && Some(def_id) == cx.tcx.lang_items().owned_box() // At this point, we know ty is Box<T>, now get T - if let Some(last) = last_path_segment(ty_qpath).args; - if let Some(boxed_ty) = last.args.iter().find_map(|arg| match arg { - GenericArg::Type(ty) => Some(ty), - _ => None, - }); - let ty_ty = hir_ty_to_ty(cx.tcx, boxed_ty); - if !ty_ty.has_escaping_bound_vars(); - if ty_ty.is_sized(cx.tcx, cx.param_env); - if let Ok(ty_ty_size) = cx.layout_of(ty_ty).map(|l| l.size.bytes()); - if ty_ty_size < box_size_threshold; - then { - span_lint_and_sugg( - cx, - VEC_BOX, - hir_ty.span, - "`Vec<T>` is already on the heap, the boxing is unnecessary", - "try", - format!("Vec<{}>", snippet(cx, boxed_ty.span, "..")), - Applicability::MachineApplicable, - ); - true - } else { - false + && let Some(last) = last_path_segment(ty_qpath).args + && let Some(GenericArg::Type(boxed_ty)) = last.args.first() + // extract allocator from the Box for later + && let boxed_alloc_ty = last.args.get(1) + && let ty_ty = hir_ty_to_ty(cx.tcx, boxed_ty) + && !ty_ty.has_escaping_bound_vars() + && ty_ty.is_sized(cx.tcx, cx.param_env) + && let Ok(ty_ty_size) = cx.layout_of(ty_ty).map(|l| l.size.bytes()) + && ty_ty_size < box_size_threshold + // https://github.com/rust-lang/rust-clippy/issues/7114 + && match (vec_alloc_ty, boxed_alloc_ty) { + (None, None) => true, + // this is in the event that we have something like + // Vec<_, Global>, in which case is equivalent to + // Vec<_> + (None, Some(GenericArg::Type(inner))) | (Some(GenericArg::Type(inner)), None) => { + if let TyKind::Path(path) = inner.kind + && let Some(did) = cx.qpath_res(&path, inner.hir_id).opt_def_id() { + match_def_path(cx, did, &ALLOCATOR_GLOBAL) + } else { + false + } + }, + (Some(GenericArg::Type(l)), Some(GenericArg::Type(r))) => + hir_ty_to_ty(cx.tcx, l) == hir_ty_to_ty(cx.tcx, r), + _ => false } + { + span_lint_and_sugg( + cx, + VEC_BOX, + hir_ty.span, + "`Vec<T>` is already on the heap, the boxing is unnecessary", + "try", + format!("Vec<{}>", snippet(cx, boxed_ty.span, "..")), + Applicability::Unspecified, + ); + true + } else { + false } } else { false diff --git a/src/tools/clippy/clippy_lints/src/undocumented_unsafe_blocks.rs b/src/tools/clippy/clippy_lints/src/undocumented_unsafe_blocks.rs index 32aebdd8c..7a6549a7c 100644 --- a/src/tools/clippy/clippy_lints/src/undocumented_unsafe_blocks.rs +++ b/src/tools/clippy/clippy_lints/src/undocumented_unsafe_blocks.rs @@ -11,7 +11,7 @@ use rustc_hir::{Block, BlockCheckMode, ItemKind, Node, UnsafeSource}; use rustc_lexer::{tokenize, TokenKind}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::{BytePos, Pos, RelativeBytePos, Span, SyntaxContext}; declare_clippy_lint! { @@ -349,7 +349,7 @@ fn block_parents_have_safety_comment( span, owner_id, .. - })) => (*span, cx.tcx.hir().local_def_id_to_hir_id(owner_id.def_id)), + })) => (*span, cx.tcx.local_def_id_to_hir_id(owner_id.def_id)), _ => { if is_branchy(expr) { return false; @@ -370,7 +370,7 @@ fn block_parents_have_safety_comment( span, owner_id, .. - }) => (*span, cx.tcx.hir().local_def_id_to_hir_id(owner_id.def_id)), + }) => (*span, cx.tcx.local_def_id_to_hir_id(owner_id.def_id)), _ => return false, }; // if unsafe block is part of a let/const/static statement, diff --git a/src/tools/clippy/clippy_lints/src/unicode.rs b/src/tools/clippy/clippy_lints/src/unicode.rs index b824deac2..3d319b9fe 100644 --- a/src/tools/clippy/clippy_lints/src/unicode.rs +++ b/src/tools/clippy/clippy_lints/src/unicode.rs @@ -6,7 +6,7 @@ use rustc_ast::ast::LitKind; use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind, HirId}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::Span; use unicode_normalization::UnicodeNormalization; diff --git a/src/tools/clippy/clippy_lints/src/uninhabited_references.rs b/src/tools/clippy/clippy_lints/src/uninhabited_references.rs new file mode 100644 index 000000000..903593ecf --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/uninhabited_references.rs @@ -0,0 +1,84 @@ +use clippy_utils::diagnostics::span_lint; +use rustc_hir::intravisit::FnKind; +use rustc_hir::{Body, Expr, ExprKind, FnDecl, FnRetTy, TyKind, UnOp}; +use rustc_hir_analysis::hir_ty_to_ty; +use rustc_lint::{LateContext, LateLintPass}; +use rustc_middle::lint::in_external_macro; +use rustc_session::declare_lint_pass; +use rustc_span::def_id::LocalDefId; +use rustc_span::Span; + +declare_clippy_lint! { + /// ### What it does + /// It detects references to uninhabited types, such as `!` and + /// warns when those are either dereferenced or returned from a function. + /// + /// ### Why is this bad? + /// Dereferencing a reference to an uninhabited type would create + /// an instance of such a type, which cannot exist. This constitutes + /// undefined behaviour. Such a reference could have been created + /// by `unsafe` code. + /// + /// ### Example + /// The following function can return a reference to an uninhabited type + /// (`Infallible`) because it uses `unsafe` code to create it. However, + /// the user of such a function could dereference the return value and + /// trigger an undefined behavior from safe code. + /// + /// ```no_run + /// fn create_ref() -> &'static std::convert::Infallible { + /// unsafe { std::mem::transmute(&()) } + /// } + /// ``` + #[clippy::version = "1.76.0"] + pub UNINHABITED_REFERENCES, + nursery, + "reference to uninhabited type" +} + +declare_lint_pass!(UninhabitedReferences => [UNINHABITED_REFERENCES]); + +impl LateLintPass<'_> for UninhabitedReferences { + fn check_expr(&mut self, cx: &LateContext<'_>, expr: &'_ Expr<'_>) { + if in_external_macro(cx.tcx.sess, expr.span) { + return; + } + + if let ExprKind::Unary(UnOp::Deref, _) = expr.kind { + let ty = cx.typeck_results().expr_ty_adjusted(expr); + if ty.is_privately_uninhabited(cx.tcx, cx.param_env) { + span_lint( + cx, + UNINHABITED_REFERENCES, + expr.span, + "dereferencing a reference to an uninhabited type is undefined behavior", + ); + } + } + } + + fn check_fn( + &mut self, + cx: &LateContext<'_>, + kind: FnKind<'_>, + fndecl: &'_ FnDecl<'_>, + _: &'_ Body<'_>, + span: Span, + _: LocalDefId, + ) { + if in_external_macro(cx.tcx.sess, span) || matches!(kind, FnKind::Closure) { + return; + } + if let FnRetTy::Return(hir_ty) = fndecl.output + && let TyKind::Ref(_, mut_ty) = hir_ty.kind + && hir_ty_to_ty(cx.tcx, mut_ty.ty).is_privately_uninhabited(cx.tcx, cx.param_env) + { + span_lint( + cx, + UNINHABITED_REFERENCES, + hir_ty.span, + "dereferencing a reference to an uninhabited type would be undefined behavior", + ); + } + } +} diff --git a/src/tools/clippy/clippy_lints/src/uninit_vec.rs b/src/tools/clippy/clippy_lints/src/uninit_vec.rs index 72569e10f..fc8519d56 100644 --- a/src/tools/clippy/clippy_lints/src/uninit_vec.rs +++ b/src/tools/clippy/clippy_lints/src/uninit_vec.rs @@ -6,7 +6,7 @@ use rustc_hir::{Block, Expr, ExprKind, HirId, PatKind, PathSegment, Stmt, StmtKi use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::lint::in_external_macro; use rustc_middle::ty; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::{sym, Span}; // TODO: add `ReadBuf` (RFC 2930) in "How to fix" once it is available in std @@ -83,41 +83,39 @@ fn handle_uninit_vec_pair<'tcx>( maybe_init_or_reserve: &'tcx Stmt<'tcx>, maybe_set_len: &'tcx Expr<'tcx>, ) { - if_chain! { - if let Some(vec) = extract_init_or_reserve_target(cx, maybe_init_or_reserve); - if let Some((set_len_self, call_span)) = extract_set_len_self(cx, maybe_set_len); - if vec.location.eq_expr(cx, set_len_self); - if let ty::Ref(_, vec_ty, _) = cx.typeck_results().expr_ty_adjusted(set_len_self).kind(); - if let ty::Adt(_, args) = vec_ty.kind(); + if let Some(vec) = extract_init_or_reserve_target(cx, maybe_init_or_reserve) + && let Some((set_len_self, call_span)) = extract_set_len_self(cx, maybe_set_len) + && vec.location.eq_expr(cx, set_len_self) + && let ty::Ref(_, vec_ty, _) = cx.typeck_results().expr_ty_adjusted(set_len_self).kind() + && let ty::Adt(_, args) = vec_ty.kind() // `#[allow(...)]` attribute can be set on enclosing unsafe block of `set_len()` - if !is_lint_allowed(cx, UNINIT_VEC, maybe_set_len.hir_id); - then { - if vec.has_capacity() { - // with_capacity / reserve -> set_len + && !is_lint_allowed(cx, UNINIT_VEC, maybe_set_len.hir_id) + { + if vec.has_capacity() { + // with_capacity / reserve -> set_len - // Check T of Vec<T> - if !is_uninit_value_valid_for_ty(cx, args.type_at(0)) { - // FIXME: #7698, false positive of the internal lints - #[expect(clippy::collapsible_span_lint_calls)] - span_lint_and_then( - cx, - UNINIT_VEC, - vec![call_span, maybe_init_or_reserve.span], - "calling `set_len()` immediately after reserving a buffer creates uninitialized values", - |diag| { - diag.help("initialize the buffer or wrap the content in `MaybeUninit`"); - }, - ); - } - } else { - // new / default -> set_len - span_lint( + // Check T of Vec<T> + if !is_uninit_value_valid_for_ty(cx, args.type_at(0)) { + // FIXME: #7698, false positive of the internal lints + #[expect(clippy::collapsible_span_lint_calls)] + span_lint_and_then( cx, UNINIT_VEC, vec![call_span, maybe_init_or_reserve.span], - "calling `set_len()` on empty `Vec` creates out-of-bound values", + "calling `set_len()` immediately after reserving a buffer creates uninitialized values", + |diag| { + diag.help("initialize the buffer or wrap the content in `MaybeUninit`"); + }, ); } + } else { + // new / default -> set_len + span_lint( + cx, + UNINIT_VEC, + vec![call_span, maybe_init_or_reserve.span], + "calling `set_len()` on empty `Vec` creates out-of-bound values", + ); } } } @@ -156,16 +154,14 @@ impl<'tcx> VecLocation<'tcx> { fn extract_init_or_reserve_target<'tcx>(cx: &LateContext<'tcx>, stmt: &'tcx Stmt<'tcx>) -> Option<TargetVec<'tcx>> { match stmt.kind { StmtKind::Local(local) => { - if_chain! { - if let Some(init_expr) = local.init; - if let PatKind::Binding(_, hir_id, _, None) = local.pat.kind; - if let Some(init_kind) = get_vec_init_kind(cx, init_expr); - then { - return Some(TargetVec { - location: VecLocation::Local(hir_id), - init_kind: Some(init_kind), - }) - } + if let Some(init_expr) = local.init + && let PatKind::Binding(_, hir_id, _, None) = local.pat.kind + && let Some(init_kind) = get_vec_init_kind(cx, init_expr) + { + return Some(TargetVec { + location: VecLocation::Local(hir_id), + init_kind: Some(init_kind), + }); } }, StmtKind::Expr(expr) | StmtKind::Semi(expr) => match expr.kind { diff --git a/src/tools/clippy/clippy_lints/src/unit_return_expecting_ord.rs b/src/tools/clippy/clippy_lints/src/unit_return_expecting_ord.rs index e76cc65fd..729972de6 100644 --- a/src/tools/clippy/clippy_lints/src/unit_return_expecting_ord.rs +++ b/src/tools/clippy/clippy_lints/src/unit_return_expecting_ord.rs @@ -1,11 +1,10 @@ use clippy_utils::diagnostics::{span_lint, span_lint_and_help}; -use if_chain::if_chain; use rustc_hir::def_id::DefId; use rustc_hir::{Closure, Expr, ExprKind, StmtKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty; use rustc_middle::ty::{ClauseKind, GenericPredicates, ProjectionPredicate, TraitPredicate}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::{sym, BytePos, Span}; declare_clippy_lint! { @@ -44,14 +43,14 @@ fn get_trait_predicates_for_trait_id<'tcx>( ) -> Vec<TraitPredicate<'tcx>> { let mut preds = Vec::new(); for (pred, _) in generics.predicates { - if_chain! { - if let ClauseKind::Trait(poly_trait_pred) = pred.kind().skip_binder(); - let trait_pred = cx.tcx.erase_late_bound_regions(pred.kind().rebind(poly_trait_pred)); - if let Some(trait_def_id) = trait_id; - if trait_def_id == trait_pred.trait_ref.def_id; - then { - preds.push(trait_pred); - } + if let ClauseKind::Trait(poly_trait_pred) = pred.kind().skip_binder() + && let trait_pred = cx + .tcx + .instantiate_bound_regions_with_erased(pred.kind().rebind(poly_trait_pred)) + && let Some(trait_def_id) = trait_id + && trait_def_id == trait_pred.trait_ref.def_id + { + preds.push(trait_pred); } } preds @@ -64,7 +63,9 @@ fn get_projection_pred<'tcx>( ) -> Option<ProjectionPredicate<'tcx>> { generics.predicates.iter().find_map(|(proj_pred, _)| { if let ClauseKind::Projection(pred) = proj_pred.kind().skip_binder() { - let projection_pred = cx.tcx.erase_late_bound_regions(proj_pred.kind().rebind(pred)); + let projection_pred = cx + .tcx + .instantiate_bound_regions_with_erased(proj_pred.kind().rebind(pred)); if projection_pred.projection_ty.args == trait_pred.trait_ref.args { return Some(projection_pred); } @@ -82,10 +83,10 @@ fn get_args_to_check<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) -> Ve let ord_preds = get_trait_predicates_for_trait_id(cx, generics, cx.tcx.get_diagnostic_item(sym::Ord)); let partial_ord_preds = get_trait_predicates_for_trait_id(cx, generics, cx.tcx.lang_items().partial_ord_trait()); - // Trying to call erase_late_bound_regions on fn_sig.inputs() gives the following error + // Trying to call instantiate_bound_regions_with_erased on fn_sig.inputs() gives the following error // The trait `rustc::ty::TypeFoldable<'_>` is not implemented for // `&[rustc_middle::ty::Ty<'_>]` - let inputs_output = cx.tcx.erase_late_bound_regions(fn_sig.inputs_and_output()); + let inputs_output = cx.tcx.instantiate_bound_regions_with_erased(fn_sig.inputs_and_output()); inputs_output .iter() .rev() @@ -94,21 +95,19 @@ fn get_args_to_check<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) -> Ve .enumerate() .for_each(|(i, inp)| { for trait_pred in &fn_mut_preds { - if_chain! { - if trait_pred.self_ty() == inp; - if let Some(return_ty_pred) = get_projection_pred(cx, generics, *trait_pred); - then { - if ord_preds - .iter() - .any(|ord| Some(ord.self_ty()) == return_ty_pred.term.ty()) - { - args_to_check.push((i, "Ord".to_string())); - } else if partial_ord_preds - .iter() - .any(|pord| pord.self_ty() == return_ty_pred.term.ty().unwrap()) - { - args_to_check.push((i, "PartialOrd".to_string())); - } + if trait_pred.self_ty() == inp + && let Some(return_ty_pred) = get_projection_pred(cx, generics, *trait_pred) + { + if ord_preds + .iter() + .any(|ord| Some(ord.self_ty()) == return_ty_pred.term.ty()) + { + args_to_check.push((i, "Ord".to_string())); + } else if partial_ord_preds + .iter() + .any(|pord| pord.self_ty() == return_ty_pred.term.ty().unwrap()) + { + args_to_check.push((i, "PartialOrd".to_string())); } } } @@ -118,30 +117,26 @@ fn get_args_to_check<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) -> Ve } fn check_arg<'tcx>(cx: &LateContext<'tcx>, arg: &'tcx Expr<'tcx>) -> Option<(Span, Option<Span>)> { - if_chain! { - if let ExprKind::Closure(&Closure { body, fn_decl_span, .. }) = arg.kind; - if let ty::Closure(_def_id, args) = &cx.typeck_results().node_type(arg.hir_id).kind(); - let ret_ty = args.as_closure().sig().output(); - let ty = cx.tcx.erase_late_bound_regions(ret_ty); - if ty.is_unit(); - then { - let body = cx.tcx.hir().body(body); - if_chain! { - if let ExprKind::Block(block, _) = body.value.kind; - if block.expr.is_none(); - if let Some(stmt) = block.stmts.last(); - if let StmtKind::Semi(_) = stmt.kind; - then { - let data = stmt.span.data(); - // Make a span out of the semicolon for the help message - Some((fn_decl_span, Some(data.with_lo(data.hi-BytePos(1))))) - } else { - Some((fn_decl_span, None)) - } - } + if let ExprKind::Closure(&Closure { body, fn_decl_span, .. }) = arg.kind + && let ty::Closure(_def_id, args) = &cx.typeck_results().node_type(arg.hir_id).kind() + && let ret_ty = args.as_closure().sig().output() + && let ty = cx.tcx.instantiate_bound_regions_with_erased(ret_ty) + && ty.is_unit() + { + let body = cx.tcx.hir().body(body); + if let ExprKind::Block(block, _) = body.value.kind + && block.expr.is_none() + && let Some(stmt) = block.stmts.last() + && let StmtKind::Semi(_) = stmt.kind + { + let data = stmt.span.data(); + // Make a span out of the semicolon for the help message + Some((fn_decl_span, Some(data.with_lo(data.hi - BytePos(1))))) } else { - None + Some((fn_decl_span, None)) } + } else { + None } } diff --git a/src/tools/clippy/clippy_lints/src/unit_types/mod.rs b/src/tools/clippy/clippy_lints/src/unit_types/mod.rs index 884c6ca4d..0abd48e64 100644 --- a/src/tools/clippy/clippy_lints/src/unit_types/mod.rs +++ b/src/tools/clippy/clippy_lints/src/unit_types/mod.rs @@ -5,7 +5,7 @@ mod utils; use rustc_hir::{Expr, Local}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/unit_types/unit_arg.rs b/src/tools/clippy/clippy_lints/src/unit_types/unit_arg.rs index 462b1aa81..44cff78a7 100644 --- a/src/tools/clippy/clippy_lints/src/unit_types/unit_arg.rs +++ b/src/tools/clippy/clippy_lints/src/unit_types/unit_arg.rs @@ -1,7 +1,6 @@ use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::is_from_proc_macro; use clippy_utils::source::{indent_of, reindent_multiline, snippet_opt}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{self as hir, Block, Expr, ExprKind, MatchSource, Node, StmtKind}; use rustc_lint::LateContext; @@ -22,12 +21,10 @@ pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) { } let map = &cx.tcx.hir(); let opt_parent_node = map.find_parent(expr.hir_id); - if_chain! { - if let Some(hir::Node::Expr(parent_expr)) = opt_parent_node; - if is_questionmark_desugar_marked_call(parent_expr); - then { - return; - } + if let Some(hir::Node::Expr(parent_expr)) = opt_parent_node + && is_questionmark_desugar_marked_call(parent_expr) + { + return; } let args: Vec<_> = match expr.kind { @@ -80,21 +77,15 @@ fn lint_unit_args(cx: &LateContext<'_>, expr: &Expr<'_>, args_to_recover: &[&Exp args_to_recover .iter() .filter_map(|arg| { - if_chain! { - if let ExprKind::Block(block, _) = arg.kind; - if block.expr.is_none(); - if let Some(last_stmt) = block.stmts.iter().last(); - if let StmtKind::Semi(last_expr) = last_stmt.kind; - if let Some(snip) = snippet_opt(cx, last_expr.span); - then { - Some(( - last_stmt.span, - snip, - )) - } - else { - None - } + if let ExprKind::Block(block, _) = arg.kind + && block.expr.is_none() + && let Some(last_stmt) = block.stmts.iter().last() + && let StmtKind::Semi(last_expr) = last_stmt.kind + && let Some(snip) = snippet_opt(cx, last_expr.span) + { + Some((last_stmt.span, snip)) + } else { + None } }) .for_each(|(span, sugg)| { diff --git a/src/tools/clippy/clippy_lints/src/unnamed_address.rs b/src/tools/clippy/clippy_lints/src/unnamed_address.rs index e7355f923..cd2dacc9f 100644 --- a/src/tools/clippy/clippy_lints/src/unnamed_address.rs +++ b/src/tools/clippy/clippy_lints/src/unnamed_address.rs @@ -1,10 +1,8 @@ -use clippy_utils::diagnostics::{span_lint, span_lint_and_help}; -use if_chain::if_chain; +use clippy_utils::diagnostics::span_lint; use rustc_hir::{BinOpKind, Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty; -use rustc_session::{declare_lint_pass, declare_tool_lint}; -use rustc_span::sym; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does @@ -30,31 +28,7 @@ declare_clippy_lint! { "comparison with an address of a function item" } -declare_clippy_lint! { - /// ### What it does - /// Checks for comparisons with an address of a trait vtable. - /// - /// ### Why is this bad? - /// Comparing trait objects pointers compares an vtable addresses which - /// are not guaranteed to be unique and could vary between different code generation units. - /// Furthermore vtables for different types could have the same address after being merged - /// together. - /// - /// ### Example - /// ```rust,ignore - /// let a: Rc<dyn Trait> = ... - /// let b: Rc<dyn Trait> = ... - /// if Rc::ptr_eq(&a, &b) { - /// ... - /// } - /// ``` - #[clippy::version = "1.44.0"] - pub VTABLE_ADDRESS_COMPARISONS, - correctness, - "comparison with an address of a trait vtable" -} - -declare_lint_pass!(UnnamedAddress => [FN_ADDRESS_COMPARISONS, VTABLE_ADDRESS_COMPARISONS]); +declare_lint_pass!(UnnamedAddress => [FN_ADDRESS_COMPARISONS]); impl LateLintPass<'_> for UnnamedAddress { fn check_expr(&mut self, cx: &LateContext<'_>, expr: &Expr<'_>) { @@ -65,66 +39,22 @@ impl LateLintPass<'_> for UnnamedAddress { ) } - fn is_trait_ptr(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool { - match cx.typeck_results().expr_ty_adjusted(expr).kind() { - ty::RawPtr(ty::TypeAndMut { ty, .. }) => ty.is_trait(), - _ => false, - } - } - fn is_fn_def(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool { matches!(cx.typeck_results().expr_ty(expr).kind(), ty::FnDef(..)) } - if_chain! { - if let ExprKind::Binary(binop, left, right) = expr.kind; - if is_comparison(binop.node); - if is_trait_ptr(cx, left) && is_trait_ptr(cx, right); - then { - span_lint_and_help( - cx, - VTABLE_ADDRESS_COMPARISONS, - expr.span, - "comparing trait object pointers compares a non-unique vtable address", - None, - "consider extracting and comparing data pointers only", - ); - } - } - - if_chain! { - if let ExprKind::Call(func, [ref _left, ref _right]) = expr.kind; - if let ExprKind::Path(ref func_qpath) = func.kind; - if let Some(def_id) = cx.qpath_res(func_qpath, func.hir_id).opt_def_id(); - if cx.tcx.is_diagnostic_item(sym::ptr_eq, def_id); - let ty_param = cx.typeck_results().node_args(func.hir_id).type_at(0); - if ty_param.is_trait(); - then { - span_lint_and_help( - cx, - VTABLE_ADDRESS_COMPARISONS, - expr.span, - "comparing trait object pointers compares a non-unique vtable address", - None, - "consider extracting and comparing data pointers only", - ); - } - } - - if_chain! { - if let ExprKind::Binary(binop, left, right) = expr.kind; - if is_comparison(binop.node); - if cx.typeck_results().expr_ty_adjusted(left).is_fn_ptr(); - if cx.typeck_results().expr_ty_adjusted(right).is_fn_ptr(); - if is_fn_def(cx, left) || is_fn_def(cx, right); - then { - span_lint( - cx, - FN_ADDRESS_COMPARISONS, - expr.span, - "comparing with a non-unique address of a function item", - ); - } + if let ExprKind::Binary(binop, left, right) = expr.kind + && is_comparison(binop.node) + && cx.typeck_results().expr_ty_adjusted(left).is_fn_ptr() + && cx.typeck_results().expr_ty_adjusted(right).is_fn_ptr() + && (is_fn_def(cx, left) || is_fn_def(cx, right)) + { + span_lint( + cx, + FN_ADDRESS_COMPARISONS, + expr.span, + "comparing with a non-unique address of a function item", + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/unnecessary_box_returns.rs b/src/tools/clippy/clippy_lints/src/unnecessary_box_returns.rs index ca159eb4d..f5af540fa 100644 --- a/src/tools/clippy/clippy_lints/src/unnecessary_box_returns.rs +++ b/src/tools/clippy/clippy_lints/src/unnecessary_box_returns.rs @@ -4,7 +4,7 @@ use rustc_errors::Applicability; use rustc_hir::def_id::LocalDefId; use rustc_hir::{FnDecl, FnRetTy, ImplItemKind, Item, ItemKind, Node, TraitItem, TraitItemKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::Symbol; declare_clippy_lint! { @@ -71,7 +71,7 @@ impl UnnecessaryBoxReturns { let return_ty = cx .tcx - .erase_late_bound_regions(cx.tcx.fn_sig(def_id).skip_binder()) + .instantiate_bound_regions_with_erased(cx.tcx.fn_sig(def_id).skip_binder()) .output(); if !return_ty.is_box() { diff --git a/src/tools/clippy/clippy_lints/src/unnecessary_map_on_constructor.rs b/src/tools/clippy/clippy_lints/src/unnecessary_map_on_constructor.rs index 9107b2b99..2b0d2d61d 100644 --- a/src/tools/clippy/clippy_lints/src/unnecessary_map_on_constructor.rs +++ b/src/tools/clippy/clippy_lints/src/unnecessary_map_on_constructor.rs @@ -4,26 +4,29 @@ use clippy_utils::ty::get_type_diagnostic_name; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { /// ### What it does - /// Suggest removing the use of a may (or map_err) method when an Option or Result is being constructed. + /// Suggests removing the use of a `map()` (or `map_err()`) method when an `Option` or `Result` + /// is being constructed. /// /// ### Why is this bad? - /// It introduces unnecessary complexity. In this case the function can be used directly and - /// construct the Option or Result from the output. + /// It introduces unnecessary complexity. Instead, the function can be called before + /// constructing the `Option` or `Result` from its return value. /// /// ### Example /// ```no_run - /// Some(4).map(i32::swap_bytes); + /// Some(4).map(i32::swap_bytes) + /// # ; /// ``` /// Use instead: /// ```no_run - /// Some(i32::swap_bytes(4)); + /// Some(i32::swap_bytes(4)) + /// # ; /// ``` - #[clippy::version = "1.73.0"] + #[clippy::version = "1.74.0"] pub UNNECESSARY_MAP_ON_CONSTRUCTOR, complexity, "using `map`/`map_err` on `Option` or `Result` constructors" @@ -59,11 +62,11 @@ impl<'tcx> LateLintPass<'tcx> for UnnecessaryMapOnConstructor { } }, hir::QPath::TypeRelative(_, path) => path.ident.name, - hir::QPath::LangItem(_, _, _) => return, + hir::QPath::LangItem(..) => return, }; match constructor_symbol { sym::Some | sym::Ok if path.ident.name == rustc_span::sym::map => (), - sym::Err if path.ident.name == sym!(map_err) => (), + sym::Err if path.ident.name == sym::map_err => (), _ => return, } diff --git a/src/tools/clippy/clippy_lints/src/unnecessary_owned_empty_strings.rs b/src/tools/clippy/clippy_lints/src/unnecessary_owned_empty_strings.rs index 28ea02e4d..6b5e6c6ab 100644 --- a/src/tools/clippy/clippy_lints/src/unnecessary_owned_empty_strings.rs +++ b/src/tools/clippy/clippy_lints/src/unnecessary_owned_empty_strings.rs @@ -1,13 +1,12 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::ty::is_type_lang_item; use clippy_utils::{match_def_path, paths}; -use if_chain::if_chain; use rustc_ast::ast::LitKind; use rustc_errors::Applicability; use rustc_hir::{BorrowKind, Expr, ExprKind, LangItem, Mutability}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::symbol::sym; declare_clippy_lint! { @@ -36,46 +35,40 @@ declare_lint_pass!(UnnecessaryOwnedEmptyStrings => [UNNECESSARY_OWNED_EMPTY_STRI impl<'tcx> LateLintPass<'tcx> for UnnecessaryOwnedEmptyStrings { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) { - if_chain! { - if let ExprKind::AddrOf(BorrowKind::Ref, Mutability::Not, inner_expr) = expr.kind; - if let ExprKind::Call(fun, args) = inner_expr.kind; - if let ExprKind::Path(ref qpath) = fun.kind; - if let Some(fun_def_id) = cx.qpath_res(qpath, fun.hir_id).opt_def_id(); - if let ty::Ref(_, inner_str, _) = cx.typeck_results().expr_ty_adjusted(expr).kind(); - if inner_str.is_str(); - then { - if match_def_path(cx, fun_def_id, &paths::STRING_NEW) { - span_lint_and_sugg( - cx, - UNNECESSARY_OWNED_EMPTY_STRINGS, - expr.span, - "usage of `&String::new()` for a function expecting a `&str` argument", - "try", - "\"\"".to_owned(), - Applicability::MachineApplicable, - ); - } else { - if_chain! { - if cx.tcx.is_diagnostic_item(sym::from_fn, fun_def_id); - if let [.., last_arg] = args; - if let ExprKind::Lit(spanned) = &last_arg.kind; - if let LitKind::Str(symbol, _) = spanned.node; - if symbol.is_empty(); - let inner_expr_type = cx.typeck_results().expr_ty(inner_expr); - if is_type_lang_item(cx, inner_expr_type, LangItem::String); - then { - span_lint_and_sugg( - cx, - UNNECESSARY_OWNED_EMPTY_STRINGS, - expr.span, - "usage of `&String::from(\"\")` for a function expecting a `&str` argument", - "try", - "\"\"".to_owned(), - Applicability::MachineApplicable, - ); - } - } - } + if let ExprKind::AddrOf(BorrowKind::Ref, Mutability::Not, inner_expr) = expr.kind + && let ExprKind::Call(fun, args) = inner_expr.kind + && let ExprKind::Path(ref qpath) = fun.kind + && let Some(fun_def_id) = cx.qpath_res(qpath, fun.hir_id).opt_def_id() + && let ty::Ref(_, inner_str, _) = cx.typeck_results().expr_ty_adjusted(expr).kind() + && inner_str.is_str() + { + if match_def_path(cx, fun_def_id, &paths::STRING_NEW) { + span_lint_and_sugg( + cx, + UNNECESSARY_OWNED_EMPTY_STRINGS, + expr.span, + "usage of `&String::new()` for a function expecting a `&str` argument", + "try", + "\"\"".to_owned(), + Applicability::MachineApplicable, + ); + } else if cx.tcx.is_diagnostic_item(sym::from_fn, fun_def_id) + && let [.., last_arg] = args + && let ExprKind::Lit(spanned) = &last_arg.kind + && let LitKind::Str(symbol, _) = spanned.node + && symbol.is_empty() + && let inner_expr_type = cx.typeck_results().expr_ty(inner_expr) + && is_type_lang_item(cx, inner_expr_type, LangItem::String) + { + span_lint_and_sugg( + cx, + UNNECESSARY_OWNED_EMPTY_STRINGS, + expr.span, + "usage of `&String::from(\"\")` for a function expecting a `&str` argument", + "try", + "\"\"".to_owned(), + Applicability::MachineApplicable, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/unnecessary_self_imports.rs b/src/tools/clippy/clippy_lints/src/unnecessary_self_imports.rs index a1083a0a6..ddee06b59 100644 --- a/src/tools/clippy/clippy_lints/src/unnecessary_self_imports.rs +++ b/src/tools/clippy/clippy_lints/src/unnecessary_self_imports.rs @@ -1,9 +1,8 @@ use clippy_utils::diagnostics::span_lint_and_then; -use if_chain::if_chain; use rustc_ast::{Item, ItemKind, UseTreeKind}; use rustc_errors::Applicability; use rustc_lint::{EarlyContext, EarlyLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::symbol::kw; declare_clippy_lint! { @@ -36,35 +35,36 @@ declare_lint_pass!(UnnecessarySelfImports => [UNNECESSARY_SELF_IMPORTS]); impl EarlyLintPass for UnnecessarySelfImports { fn check_item(&mut self, cx: &EarlyContext<'_>, item: &Item) { - if_chain! { - if let ItemKind::Use(use_tree) = &item.kind; - if let UseTreeKind::Nested(nodes) = &use_tree.kind; - if let [(self_tree, _)] = &**nodes; - if let [self_seg] = &*self_tree.prefix.segments; - if self_seg.ident.name == kw::SelfLower; - if let Some(last_segment) = use_tree.prefix.segments.last(); - - then { - span_lint_and_then( - cx, - UNNECESSARY_SELF_IMPORTS, - item.span, - "import ending with `::{self}`", - |diag| { - diag.span_suggestion( - last_segment.span().with_hi(item.span.hi()), - "consider omitting `::{self}`", - format!( - "{}{};", - last_segment.ident, - if let UseTreeKind::Simple(Some(alias)) = self_tree.kind { format!(" as {alias}") } else { String::new() }, - ), - Applicability::MaybeIncorrect, - ); - diag.note("this will slightly change semantics; any non-module items at the same path will also be imported"); - }, - ); - } + if let ItemKind::Use(use_tree) = &item.kind + && let UseTreeKind::Nested(nodes) = &use_tree.kind + && let [(self_tree, _)] = &**nodes + && let [self_seg] = &*self_tree.prefix.segments + && self_seg.ident.name == kw::SelfLower + && let Some(last_segment) = use_tree.prefix.segments.last() + { + span_lint_and_then( + cx, + UNNECESSARY_SELF_IMPORTS, + item.span, + "import ending with `::{self}`", + |diag| { + diag.span_suggestion( + last_segment.span().with_hi(item.span.hi()), + "consider omitting `::{self}`", + format!( + "{}{};", + last_segment.ident, + if let UseTreeKind::Simple(Some(alias)) = self_tree.kind { + format!(" as {alias}") + } else { + String::new() + }, + ), + Applicability::MaybeIncorrect, + ); + diag.note("this will slightly change semantics; any non-module items at the same path will also be imported"); + }, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/unnecessary_struct_initialization.rs b/src/tools/clippy/clippy_lints/src/unnecessary_struct_initialization.rs index c35a2afab..333ea0c82 100644 --- a/src/tools/clippy/clippy_lints/src/unnecessary_struct_initialization.rs +++ b/src/tools/clippy/clippy_lints/src/unnecessary_struct_initialization.rs @@ -4,7 +4,7 @@ use clippy_utils::ty::is_copy; use clippy_utils::{get_parent_expr, path_to_local}; use rustc_hir::{BindingAnnotation, Expr, ExprKind, Node, PatKind, UnOp}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does @@ -82,7 +82,7 @@ impl LateLintPass<'_> for UnnecessaryStruct { fn is_mutable(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool { if let Some(hir_id) = path_to_local(expr) - && let Node::Pat(pat) = cx.tcx.hir().get(hir_id) + && let Node::Pat(pat) = cx.tcx.hir_node(hir_id) { matches!(pat.kind, PatKind::Binding(BindingAnnotation::MUT, ..)) } else { diff --git a/src/tools/clippy/clippy_lints/src/unnecessary_wraps.rs b/src/tools/clippy/clippy_lints/src/unnecessary_wraps.rs index ab8de17b0..446160f8e 100644 --- a/src/tools/clippy/clippy_lints/src/unnecessary_wraps.rs +++ b/src/tools/clippy/clippy_lints/src/unnecessary_wraps.rs @@ -2,14 +2,13 @@ use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::source::snippet; use clippy_utils::visitors::find_all_ret_expressions; use clippy_utils::{contains_return, is_res_lang_ctor, path_res, return_ty}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::intravisit::FnKind; use rustc_hir::LangItem::{OptionSome, ResultOk}; use rustc_hir::{Body, ExprKind, FnDecl, Impl, ItemKind, Node}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::def_id::LocalDefId; use rustc_span::symbol::sym; use rustc_span::Span; @@ -92,7 +91,7 @@ impl<'tcx> LateLintPass<'tcx> for UnnecessaryWraps { } // Abort if the method is implementing a trait or of it a trait method. - let hir_id = cx.tcx.hir().local_def_id_to_hir_id(def_id); + let hir_id = cx.tcx.local_def_id_to_hir_id(def_id); if let Some(Node::Item(item)) = cx.tcx.hir().find_parent(hir_id) { if matches!( item.kind, @@ -119,28 +118,24 @@ impl<'tcx> LateLintPass<'tcx> for UnnecessaryWraps { // Check if all return expression respect the following condition and collect them. let mut suggs = Vec::new(); let can_sugg = find_all_ret_expressions(cx, body.value, |ret_expr| { - if_chain! { - if !ret_expr.span.from_expansion(); + if !ret_expr.span.from_expansion() // Check if a function call. - if let ExprKind::Call(func, [arg]) = ret_expr.kind; - if is_res_lang_ctor(cx, path_res(cx, func), lang_item); + && let ExprKind::Call(func, [arg]) = ret_expr.kind + && is_res_lang_ctor(cx, path_res(cx, func), lang_item) // Make sure the function argument does not contain a return expression. - if !contains_return(arg); - then { - suggs.push( - ( - ret_expr.span, - if inner_type.is_unit() { - String::new() - } else { - snippet(cx, arg.span.source_callsite(), "..").to_string() - } - ) - ); - true - } else { - false - } + && !contains_return(arg) + { + suggs.push(( + ret_expr.span, + if inner_type.is_unit() { + String::new() + } else { + snippet(cx, arg.span.source_callsite(), "..").to_string() + }, + )); + true + } else { + false } }); diff --git a/src/tools/clippy/clippy_lints/src/unnested_or_patterns.rs b/src/tools/clippy/clippy_lints/src/unnested_or_patterns.rs index 8ff088a20..65600009c 100644 --- a/src/tools/clippy/clippy_lints/src/unnested_or_patterns.rs +++ b/src/tools/clippy/clippy_lints/src/unnested_or_patterns.rs @@ -11,7 +11,7 @@ use rustc_ast::{self as ast, Mutability, Pat, PatKind, DUMMY_NODE_ID}; use rustc_ast_pretty::pprust; use rustc_errors::Applicability; use rustc_lint::{EarlyContext, EarlyLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::DUMMY_SP; use std::cell::Cell; use std::mem; @@ -226,7 +226,7 @@ fn transform_with_focus_on_idx(alternatives: &mut ThinVec<P<Pat>>, focus_idx: us // Therefore they are not some form of constructor `C`, // with which a pattern `C(p_0)` may be formed, // which we would want to join with other `C(p_j)`s. - Ident(.., None) | Lit(_) | Wild | Path(..) | Range(..) | Rest | MacCall(_) + Ident(.., None) | Lit(_) | Wild | Never | Path(..) | Range(..) | Rest | MacCall(_) // Skip immutable refs, as grouping them saves few characters, // and almost always requires adding parens (increasing noisiness). // In the case of only two patterns, replacement adds net characters. diff --git a/src/tools/clippy/clippy_lints/src/unsafe_removed_from_name.rs b/src/tools/clippy/clippy_lints/src/unsafe_removed_from_name.rs index c43d5dc94..3f2f765f7 100644 --- a/src/tools/clippy/clippy_lints/src/unsafe_removed_from_name.rs +++ b/src/tools/clippy/clippy_lints/src/unsafe_removed_from_name.rs @@ -1,9 +1,9 @@ use clippy_utils::diagnostics::span_lint; use rustc_ast::ast::{Item, ItemKind, UseTree, UseTreeKind}; use rustc_lint::{EarlyContext, EarlyLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; -use rustc_span::Span; +use rustc_session::declare_lint_pass; use rustc_span::symbol::Ident; +use rustc_span::Span; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/unused_async.rs b/src/tools/clippy/clippy_lints/src/unused_async.rs index aea72c798..9c8c44c0a 100644 --- a/src/tools/clippy/clippy_lints/src/unused_async.rs +++ b/src/tools/clippy/clippy_lints/src/unused_async.rs @@ -5,7 +5,7 @@ use rustc_hir::intravisit::{walk_body, walk_expr, walk_fn, FnKind, Visitor}; use rustc_hir::{Body, Expr, ExprKind, FnDecl, Node, YieldSource}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::hir::nested_filter; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::def_id::{LocalDefId, LocalDefIdSet}; use rustc_span::Span; @@ -148,7 +148,7 @@ impl<'tcx> LateLintPass<'tcx> for UnusedAsync { // statements, so don't lint at all if there are any such paths. if let Some(def_id) = path.res.opt_def_id() && let Some(local_def_id) = def_id.as_local() - && let Some(DefKind::Fn) = cx.tcx.opt_def_kind(def_id) + && cx.tcx.def_kind(def_id) == DefKind::Fn && cx.tcx.asyncness(def_id).is_async() && !is_node_func_call(cx.tcx.hir().get_parent(hir_id), path.span) { diff --git a/src/tools/clippy/clippy_lints/src/unused_io_amount.rs b/src/tools/clippy/clippy_lints/src/unused_io_amount.rs index 0fcb62017..1de9adfcb 100644 --- a/src/tools/clippy/clippy_lints/src/unused_io_amount.rs +++ b/src/tools/clippy/clippy_lints/src/unused_io_amount.rs @@ -2,7 +2,7 @@ use clippy_utils::diagnostics::{span_lint, span_lint_and_help}; use clippy_utils::{is_trait_method, is_try, match_trait_method, paths}; use rustc_hir as hir; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/unused_peekable.rs b/src/tools/clippy/clippy_lints/src/unused_peekable.rs index 0473ecaab..ba72b3450 100644 --- a/src/tools/clippy/clippy_lints/src/unused_peekable.rs +++ b/src/tools/clippy/clippy_lints/src/unused_peekable.rs @@ -6,7 +6,7 @@ use rustc_hir::intravisit::{walk_expr, Visitor}; use rustc_hir::{Block, Expr, ExprKind, HirId, Local, Node, PatKind, PathSegment, StmtKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::hir::nested_filter::OnlyBodies; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/unused_rounding.rs b/src/tools/clippy/clippy_lints/src/unused_rounding.rs index fbb36bea0..d5ca844b9 100644 --- a/src/tools/clippy/clippy_lints/src/unused_rounding.rs +++ b/src/tools/clippy/clippy_lints/src/unused_rounding.rs @@ -3,7 +3,7 @@ use clippy_utils::source::snippet; use rustc_ast::ast::{Expr, ExprKind, MethodCall}; use rustc_errors::Applicability; use rustc_lint::{EarlyContext, EarlyLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/unused_self.rs b/src/tools/clippy/clippy_lints/src/unused_self.rs index f864c5203..a67f53f00 100644 --- a/src/tools/clippy/clippy_lints/src/unused_self.rs +++ b/src/tools/clippy/clippy_lints/src/unused_self.rs @@ -1,10 +1,9 @@ use clippy_utils::diagnostics::span_lint_and_help; use clippy_utils::macros::root_macro_call_first_node; use clippy_utils::visitors::is_local_used; -use if_chain::if_chain; use rustc_hir::{Body, Impl, ImplItem, ImplItemKind, ItemKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use std::ops::ControlFlow; declare_clippy_lint! { @@ -73,25 +72,23 @@ impl<'tcx> LateLintPass<'tcx> for UnusedSelf { }) .is_some() }; - if_chain! { - if let ItemKind::Impl(Impl { of_trait: None, .. }) = parent_item.kind; - if assoc_item.fn_has_self_parameter; - if let ImplItemKind::Fn(.., body_id) = &impl_item.kind; - if !cx.effective_visibilities.is_exported(impl_item.owner_id.def_id) || !self.avoid_breaking_exported_api; - let body = cx.tcx.hir().body(*body_id); - if let [self_param, ..] = body.params; - if !is_local_used(cx, body, self_param.pat.hir_id); - if !contains_todo(cx, body); - then { - span_lint_and_help( - cx, - UNUSED_SELF, - self_param.span, - "unused `self` argument", - None, - "consider refactoring to an associated function", - ); - } + if let ItemKind::Impl(Impl { of_trait: None, .. }) = parent_item.kind + && assoc_item.fn_has_self_parameter + && let ImplItemKind::Fn(.., body_id) = &impl_item.kind + && (!cx.effective_visibilities.is_exported(impl_item.owner_id.def_id) || !self.avoid_breaking_exported_api) + && let body = cx.tcx.hir().body(*body_id) + && let [self_param, ..] = body.params + && !is_local_used(cx, body, self_param.pat.hir_id) + && !contains_todo(cx, body) + { + span_lint_and_help( + cx, + UNUSED_SELF, + self_param.span, + "unused `self` argument", + None, + "consider refactoring to an associated function", + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/unused_unit.rs b/src/tools/clippy/clippy_lints/src/unused_unit.rs index adbf82813..0a73da202 100644 --- a/src/tools/clippy/clippy_lints/src/unused_unit.rs +++ b/src/tools/clippy/clippy_lints/src/unused_unit.rs @@ -1,11 +1,10 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::{position_before_rarrow, snippet_opt}; -use if_chain::if_chain; use rustc_ast::visit::FnKind; use rustc_ast::{ast, ClosureBinder}; use rustc_errors::Applicability; use rustc_lint::{EarlyContext, EarlyLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::{BytePos, Span}; declare_clippy_lint! { @@ -37,40 +36,39 @@ declare_lint_pass!(UnusedUnit => [UNUSED_UNIT]); impl EarlyLintPass for UnusedUnit { fn check_fn(&mut self, cx: &EarlyContext<'_>, kind: FnKind<'_>, span: Span, _: ast::NodeId) { - if_chain! { - if let ast::FnRetTy::Ty(ref ty) = kind.decl().output; - if let ast::TyKind::Tup(ref vals) = ty.kind; - if vals.is_empty() && !ty.span.from_expansion() && get_def(span) == get_def(ty.span); - then { - // implicit types in closure signatures are forbidden when `for<...>` is present - if let FnKind::Closure(&ClosureBinder::For { .. }, ..) = kind { - return; - } - - lint_unneeded_unit_return(cx, ty, span); + if let ast::FnRetTy::Ty(ref ty) = kind.decl().output + && let ast::TyKind::Tup(ref vals) = ty.kind + && vals.is_empty() + && !ty.span.from_expansion() + && get_def(span) == get_def(ty.span) + { + // implicit types in closure signatures are forbidden when `for<...>` is present + if let FnKind::Closure(&ClosureBinder::For { .. }, ..) = kind { + return; } + + lint_unneeded_unit_return(cx, ty, span); } } fn check_block(&mut self, cx: &EarlyContext<'_>, block: &ast::Block) { - if_chain! { - if let Some(stmt) = block.stmts.last(); - if let ast::StmtKind::Expr(ref expr) = stmt.kind; - if is_unit_expr(expr); - let ctxt = block.span.ctxt(); - if stmt.span.ctxt() == ctxt && expr.span.ctxt() == ctxt; - then { - let sp = expr.span; - span_lint_and_sugg( - cx, - UNUSED_UNIT, - sp, - "unneeded unit expression", - "remove the final `()`", - String::new(), - Applicability::MachineApplicable, - ); - } + if let Some(stmt) = block.stmts.last() + && let ast::StmtKind::Expr(ref expr) = stmt.kind + && is_unit_expr(expr) + && let ctxt = block.span.ctxt() + && stmt.span.ctxt() == ctxt + && expr.span.ctxt() == ctxt + { + let sp = expr.span; + span_lint_and_sugg( + cx, + UNUSED_UNIT, + sp, + "unneeded unit expression", + "remove the final `()`", + String::new(), + Applicability::MachineApplicable, + ); } } @@ -96,16 +94,14 @@ impl EarlyLintPass for UnusedUnit { fn check_poly_trait_ref(&mut self, cx: &EarlyContext<'_>, poly: &ast::PolyTraitRef) { let segments = &poly.trait_ref.path.segments; - if_chain! { - if segments.len() == 1; - if ["Fn", "FnMut", "FnOnce"].contains(&segments[0].ident.name.as_str()); - if let Some(args) = &segments[0].args; - if let ast::GenericArgs::Parenthesized(generic_args) = &**args; - if let ast::FnRetTy::Ty(ty) = &generic_args.output; - if ty.kind.is_unit(); - then { - lint_unneeded_unit_return(cx, ty, generic_args.span); - } + if segments.len() == 1 + && ["Fn", "FnMut", "FnOnce"].contains(&segments[0].ident.name.as_str()) + && let Some(args) = &segments[0].args + && let ast::GenericArgs::Parenthesized(generic_args) = &**args + && let ast::FnRetTy::Ty(ty) = &generic_args.output + && ty.kind.is_unit() + { + lint_unneeded_unit_return(cx, ty, generic_args.span); } } } diff --git a/src/tools/clippy/clippy_lints/src/unwrap.rs b/src/tools/clippy/clippy_lints/src/unwrap.rs index cdfcb8500..ae2ac38cf 100644 --- a/src/tools/clippy/clippy_lints/src/unwrap.rs +++ b/src/tools/clippy/clippy_lints/src/unwrap.rs @@ -2,7 +2,6 @@ use clippy_utils::diagnostics::span_lint_hir_and_then; use clippy_utils::ty::is_type_diagnostic_item; use clippy_utils::usage::is_potentially_local_place; use clippy_utils::{higher, path_to_local}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::intravisit::{walk_expr, walk_fn, FnKind, Visitor}; use rustc_hir::{BinOpKind, Body, Expr, ExprKind, FnDecl, HirId, Node, PathSegment, UnOp}; @@ -13,7 +12,7 @@ use rustc_middle::hir::nested_filter; use rustc_middle::lint::in_external_macro; use rustc_middle::mir::FakeReadCause; use rustc_middle::ty::{self, Ty, TyCtxt}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::def_id::LocalDefId; use rustc_span::{sym, Span}; @@ -155,41 +154,35 @@ fn collect_unwrap_info<'tcx>( } } else if let ExprKind::Unary(UnOp::Not, expr) = &expr.kind { return collect_unwrap_info(cx, if_expr, expr, branch, !invert, false); - } else { - if_chain! { - if let ExprKind::MethodCall(method_name, receiver, args, _) = &expr.kind; - if let Some(local_id) = path_to_local(receiver); - let ty = cx.typeck_results().expr_ty(receiver); - let name = method_name.ident.as_str(); - if is_relevant_option_call(cx, ty, name) || is_relevant_result_call(cx, ty, name); - then { - assert!(args.is_empty()); - let unwrappable = match name { - "is_some" | "is_ok" => true, - "is_err" | "is_none" => false, - _ => unreachable!(), - }; - let safe_to_unwrap = unwrappable != invert; - let kind = if is_type_diagnostic_item(cx, ty, sym::Option) { - UnwrappableKind::Option - } else { - UnwrappableKind::Result - }; + } else if let ExprKind::MethodCall(method_name, receiver, args, _) = &expr.kind + && let Some(local_id) = path_to_local(receiver) + && let ty = cx.typeck_results().expr_ty(receiver) + && let name = method_name.ident.as_str() + && (is_relevant_option_call(cx, ty, name) || is_relevant_result_call(cx, ty, name)) + { + assert!(args.is_empty()); + let unwrappable = match name { + "is_some" | "is_ok" => true, + "is_err" | "is_none" => false, + _ => unreachable!(), + }; + let safe_to_unwrap = unwrappable != invert; + let kind = if is_type_diagnostic_item(cx, ty, sym::Option) { + UnwrappableKind::Option + } else { + UnwrappableKind::Result + }; - return vec![ - UnwrapInfo { - local_id, - if_expr, - check: expr, - check_name: method_name, - branch, - safe_to_unwrap, - kind, - is_entire_condition, - } - ] - } - } + return vec![UnwrapInfo { + local_id, + if_expr, + check: expr, + check_name: method_name, + branch, + safe_to_unwrap, + kind, + is_entire_condition, + }]; } Vec::new() } @@ -319,73 +312,72 @@ impl<'a, 'tcx> Visitor<'tcx> for UnwrappableVariablesVisitor<'a, 'tcx> { } } else { // find `unwrap[_err]()` calls: - if_chain! { - if let ExprKind::MethodCall(method_name, self_arg, ..) = expr.kind; - let (self_arg, as_ref_kind) = consume_option_as_ref(self_arg); - if let Some(id) = path_to_local(self_arg); - if [sym::unwrap, sym::expect, sym!(unwrap_err)].contains(&method_name.ident.name); - let call_to_unwrap = [sym::unwrap, sym::expect].contains(&method_name.ident.name); - if let Some(unwrappable) = self.unwrappables.iter() - .find(|u| u.local_id == id); + if let ExprKind::MethodCall(method_name, self_arg, ..) = expr.kind + && let (self_arg, as_ref_kind) = consume_option_as_ref(self_arg) + && let Some(id) = path_to_local(self_arg) + && [sym::unwrap, sym::expect, sym!(unwrap_err)].contains(&method_name.ident.name) + && let call_to_unwrap = [sym::unwrap, sym::expect].contains(&method_name.ident.name) + && let Some(unwrappable) = self.unwrappables.iter() + .find(|u| u.local_id == id) // Span contexts should not differ with the conditional branch - let span_ctxt = expr.span.ctxt(); - if unwrappable.branch.span.ctxt() == span_ctxt; - if unwrappable.check.span.ctxt() == span_ctxt; - then { - if call_to_unwrap == unwrappable.safe_to_unwrap { - let is_entire_condition = unwrappable.is_entire_condition; - let unwrappable_variable_name = self.cx.tcx.hir().name(unwrappable.local_id); - let suggested_pattern = if call_to_unwrap { - unwrappable.kind.success_variant_pattern() - } else { - unwrappable.kind.error_variant_pattern() - }; - - span_lint_hir_and_then( - self.cx, - UNNECESSARY_UNWRAP, - expr.hir_id, - expr.span, - &format!( - "called `{}` on `{unwrappable_variable_name}` after checking its variant with `{}`", - method_name.ident.name, - unwrappable.check_name.ident.as_str(), - ), - |diag| { - if is_entire_condition { - diag.span_suggestion( - unwrappable.check.span.with_lo(unwrappable.if_expr.span.lo()), - "try", - format!( - "if let {suggested_pattern} = {borrow_prefix}{unwrappable_variable_name}", - borrow_prefix = match as_ref_kind { - Some(AsRefKind::AsRef) => "&", - Some(AsRefKind::AsMut) => "&mut ", - None => "", - }, - ), - // We don't track how the unwrapped value is used inside the - // block or suggest deleting the unwrap, so we can't offer a - // fixable solution. - Applicability::Unspecified, - ); - } else { - diag.span_label(unwrappable.check.span, "the check is happening here"); - diag.help("try using `if let` or `match`"); - } - }, - ); + && let span_ctxt = expr.span.ctxt() + && unwrappable.branch.span.ctxt() == span_ctxt + && unwrappable.check.span.ctxt() == span_ctxt + { + if call_to_unwrap == unwrappable.safe_to_unwrap { + let is_entire_condition = unwrappable.is_entire_condition; + let unwrappable_variable_name = self.cx.tcx.hir().name(unwrappable.local_id); + let suggested_pattern = if call_to_unwrap { + unwrappable.kind.success_variant_pattern() } else { - span_lint_hir_and_then( - self.cx, - PANICKING_UNWRAP, - expr.hir_id, - expr.span, - &format!("this call to `{}()` will always panic", - method_name.ident.name), - |diag| { diag.span_label(unwrappable.check.span, "because of this check"); }, - ); - } + unwrappable.kind.error_variant_pattern() + }; + + span_lint_hir_and_then( + self.cx, + UNNECESSARY_UNWRAP, + expr.hir_id, + expr.span, + &format!( + "called `{}` on `{unwrappable_variable_name}` after checking its variant with `{}`", + method_name.ident.name, + unwrappable.check_name.ident.as_str(), + ), + |diag| { + if is_entire_condition { + diag.span_suggestion( + unwrappable.check.span.with_lo(unwrappable.if_expr.span.lo()), + "try", + format!( + "if let {suggested_pattern} = {borrow_prefix}{unwrappable_variable_name}", + borrow_prefix = match as_ref_kind { + Some(AsRefKind::AsRef) => "&", + Some(AsRefKind::AsMut) => "&mut ", + None => "", + }, + ), + // We don't track how the unwrapped value is used inside the + // block or suggest deleting the unwrap, so we can't offer a + // fixable solution. + Applicability::Unspecified, + ); + } else { + diag.span_label(unwrappable.check.span, "the check is happening here"); + diag.help("try using `if let` or `match`"); + } + }, + ); + } else { + span_lint_hir_and_then( + self.cx, + PANICKING_UNWRAP, + expr.hir_id, + expr.span, + &format!("this call to `{}()` will always panic", method_name.ident.name), + |diag| { + diag.span_label(unwrappable.check.span, "because of this check"); + }, + ); } } walk_expr(self, expr); diff --git a/src/tools/clippy/clippy_lints/src/unwrap_in_result.rs b/src/tools/clippy/clippy_lints/src/unwrap_in_result.rs index 21592abbf..a615ef116 100644 --- a/src/tools/clippy/clippy_lints/src/unwrap_in_result.rs +++ b/src/tools/clippy/clippy_lints/src/unwrap_in_result.rs @@ -3,11 +3,10 @@ use clippy_utils::ty::is_type_diagnostic_item; use clippy_utils::visitors::for_each_expr; use clippy_utils::{method_chain_args, return_ty}; use core::ops::ControlFlow; -use if_chain::if_chain; use rustc_hir as hir; use rustc_hir::ImplItemKind; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::{sym, Span}; declare_clippy_lint! { @@ -60,15 +59,13 @@ declare_lint_pass!(UnwrapInResult=> [UNWRAP_IN_RESULT]); impl<'tcx> LateLintPass<'tcx> for UnwrapInResult { fn check_impl_item(&mut self, cx: &LateContext<'tcx>, impl_item: &'tcx hir::ImplItem<'_>) { - if_chain! { + if let hir::ImplItemKind::Fn(ref _signature, _) = impl_item.kind // first check if it's a method or function - if let hir::ImplItemKind::Fn(ref _signature, _) = impl_item.kind; // checking if its return type is `result` or `option` - if is_type_diagnostic_item(cx, return_ty(cx, impl_item.owner_id), sym::Result) - || is_type_diagnostic_item(cx, return_ty(cx, impl_item.owner_id), sym::Option); - then { - lint_impl_body(cx, impl_item.span, impl_item); - } + && (is_type_diagnostic_item(cx, return_ty(cx, impl_item.owner_id), sym::Result) + || is_type_diagnostic_item(cx, return_ty(cx, impl_item.owner_id), sym::Option)) + { + lint_impl_body(cx, impl_item.span, impl_item); } } } diff --git a/src/tools/clippy/clippy_lints/src/upper_case_acronyms.rs b/src/tools/clippy/clippy_lints/src/upper_case_acronyms.rs index de6a75b79..d2a1d42f2 100644 --- a/src/tools/clippy/clippy_lints/src/upper_case_acronyms.rs +++ b/src/tools/clippy/clippy_lints/src/upper_case_acronyms.rs @@ -1,10 +1,10 @@ -use clippy_utils::diagnostics::span_lint_and_sugg; +use clippy_utils::diagnostics::span_lint_hir_and_then; use itertools::Itertools; use rustc_errors::Applicability; -use rustc_hir::{Item, ItemKind}; +use rustc_hir::{HirId, Item, ItemKind}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::symbol::Ident; declare_clippy_lint! { @@ -77,7 +77,7 @@ fn correct_ident(ident: &str) -> String { ident } -fn check_ident(cx: &LateContext<'_>, ident: &Ident, be_aggressive: bool) { +fn check_ident(cx: &LateContext<'_>, ident: &Ident, hir_id: HirId, be_aggressive: bool) { let span = ident.span; let ident = ident.as_str(); let corrected = correct_ident(ident); @@ -89,14 +89,20 @@ fn check_ident(cx: &LateContext<'_>, ident: &Ident, be_aggressive: bool) { // upper-case-acronyms-aggressive config option enabled || (be_aggressive && ident != corrected) { - span_lint_and_sugg( + span_lint_hir_and_then( cx, UPPER_CASE_ACRONYMS, + hir_id, span, &format!("name `{ident}` contains a capitalized acronym"), - "consider making the acronym lowercase, except the initial letter", - corrected, - Applicability::MaybeIncorrect, + |diag| { + diag.span_suggestion( + span, + "consider making the acronym lowercase, except the initial letter", + corrected, + Applicability::MaybeIncorrect, + ); + }, ); } } @@ -111,16 +117,15 @@ impl LateLintPass<'_> for UpperCaseAcronyms { } match it.kind { ItemKind::TyAlias(..) | ItemKind::Struct(..) | ItemKind::Trait(..) => { - check_ident(cx, &it.ident, self.upper_case_acronyms_aggressive); + check_ident(cx, &it.ident, it.hir_id(), self.upper_case_acronyms_aggressive); }, ItemKind::Enum(ref enumdef, _) => { - check_ident(cx, &it.ident, self.upper_case_acronyms_aggressive); + check_ident(cx, &it.ident, it.hir_id(), self.upper_case_acronyms_aggressive); // check enum variants separately because again we only want to lint on private enums and // the fn check_variant does not know about the vis of the enum of its variants - enumdef - .variants - .iter() - .for_each(|variant| check_ident(cx, &variant.ident, self.upper_case_acronyms_aggressive)); + enumdef.variants.iter().for_each(|variant| { + check_ident(cx, &variant.ident, variant.hir_id, self.upper_case_acronyms_aggressive); + }); }, _ => {}, } diff --git a/src/tools/clippy/clippy_lints/src/use_self.rs b/src/tools/clippy/clippy_lints/src/use_self.rs index c3fe16ad5..fa033838e 100644 --- a/src/tools/clippy/clippy_lints/src/use_self.rs +++ b/src/tools/clippy/clippy_lints/src/use_self.rs @@ -2,7 +2,6 @@ use clippy_config::msrvs::{self, Msrv}; use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::is_from_proc_macro; use clippy_utils::ty::same_type_and_consts; -use if_chain::if_chain; use rustc_data_structures::fx::FxHashSet; use rustc_errors::Applicability; use rustc_hir::def::{CtorOf, DefKind, Res}; @@ -14,7 +13,7 @@ use rustc_hir::{ }; use rustc_hir_analysis::hir_ty_to_ty; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::Span; declare_clippy_lint! { @@ -93,32 +92,40 @@ impl<'tcx> LateLintPass<'tcx> for UseSelf { // relevant for linting, since this is the self type of the `impl` we're currently in. To // avoid linting on nested items, we push `StackItem::NoCheck` on the stack to signal, that // we're in an `impl` or nested item, that we don't want to lint - let stack_item = if_chain! { - if let ItemKind::Impl(Impl { self_ty, generics,.. }) = item.kind; - if let TyKind::Path(QPath::Resolved(_, item_path)) = self_ty.kind; - let parameters = &item_path.segments.last().expect(SEGMENTS_MSG).args; - if parameters.as_ref().map_or(true, |params| { - params.parenthesized == GenericArgsParentheses::No + let stack_item = if let ItemKind::Impl(Impl { self_ty, generics, .. }) = item.kind + && let TyKind::Path(QPath::Resolved(_, item_path)) = self_ty.kind + && let parameters = &item_path.segments.last().expect(SEGMENTS_MSG).args + && parameters.as_ref().map_or(true, |params| { + params.parenthesized == GenericArgsParentheses::No && !params.args.iter().any(|arg| matches!(arg, GenericArg::Lifetime(_))) - }); - if !item.span.from_expansion(); - if !is_from_proc_macro(cx, item); // expensive, should be last check - then { - // Self cannot be used inside const generic parameters - let types_to_skip = generics.params.iter().filter_map(|param| { - match param { - GenericParam { kind: GenericParamKind::Const { ty: Ty { hir_id, ..}, ..}, ..} => Some(*hir_id), - _ => None, - } - }).chain(std::iter::once(self_ty.hir_id)).collect(); - StackItem::Check { - impl_id: item.owner_id.def_id, - in_body: 0, - types_to_skip, - } - } else { - StackItem::NoCheck + }) + && !item.span.from_expansion() + && !is_from_proc_macro(cx, item) + // expensive, should be last check + { + // Self cannot be used inside const generic parameters + let types_to_skip = generics + .params + .iter() + .filter_map(|param| match param { + GenericParam { + kind: + GenericParamKind::Const { + ty: Ty { hir_id, .. }, .. + }, + .. + } => Some(*hir_id), + _ => None, + }) + .chain(std::iter::once(self_ty.hir_id)) + .collect(); + StackItem::Check { + impl_id: item.owner_id.def_id, + in_body: 0, + types_to_skip, } + } else { + StackItem::NoCheck }; self.stack.push(stack_item); } @@ -132,56 +139,54 @@ impl<'tcx> LateLintPass<'tcx> for UseSelf { fn check_impl_item(&mut self, cx: &LateContext<'_>, impl_item: &hir::ImplItem<'_>) { // We want to skip types in trait `impl`s that aren't declared as `Self` in the trait // declaration. The collection of those types is all this method implementation does. - if_chain! { - if let ImplItemKind::Fn(FnSig { decl, .. }, ..) = impl_item.kind; - if let Some(&mut StackItem::Check { + if let ImplItemKind::Fn(FnSig { decl, .. }, ..) = impl_item.kind + && let Some(&mut StackItem::Check { impl_id, ref mut types_to_skip, .. - }) = self.stack.last_mut(); - if let Some(impl_trait_ref) = cx.tcx.impl_trait_ref(impl_id); - then { - // `self_ty` is the semantic self type of `impl <trait> for <type>`. This cannot be - // `Self`. - let self_ty = impl_trait_ref.instantiate_identity().self_ty(); + }) = self.stack.last_mut() + && let Some(impl_trait_ref) = cx.tcx.impl_trait_ref(impl_id) + { + // `self_ty` is the semantic self type of `impl <trait> for <type>`. This cannot be + // `Self`. + let self_ty = impl_trait_ref.instantiate_identity().self_ty(); - // `trait_method_sig` is the signature of the function, how it is declared in the - // trait, not in the impl of the trait. - let trait_method = cx - .tcx - .associated_item(impl_item.owner_id) - .trait_item_def_id - .expect("impl method matches a trait method"); - let trait_method_sig = cx.tcx.fn_sig(trait_method).instantiate_identity(); - let trait_method_sig = cx.tcx.erase_late_bound_regions(trait_method_sig); + // `trait_method_sig` is the signature of the function, how it is declared in the + // trait, not in the impl of the trait. + let trait_method = cx + .tcx + .associated_item(impl_item.owner_id) + .trait_item_def_id + .expect("impl method matches a trait method"); + let trait_method_sig = cx.tcx.fn_sig(trait_method).instantiate_identity(); + let trait_method_sig = cx.tcx.instantiate_bound_regions_with_erased(trait_method_sig); - // `impl_inputs_outputs` is an iterator over the types (`hir::Ty`) declared in the - // implementation of the trait. - let output_hir_ty = if let FnRetTy::Return(ty) = &decl.output { - Some(&**ty) - } else { - None - }; - let impl_inputs_outputs = decl.inputs.iter().chain(output_hir_ty); + // `impl_inputs_outputs` is an iterator over the types (`hir::Ty`) declared in the + // implementation of the trait. + let output_hir_ty = if let FnRetTy::Return(ty) = &decl.output { + Some(&**ty) + } else { + None + }; + let impl_inputs_outputs = decl.inputs.iter().chain(output_hir_ty); - // `impl_hir_ty` (of type `hir::Ty`) represents the type written in the signature. - // - // `trait_sem_ty` (of type `ty::Ty`) is the semantic type for the signature in the - // trait declaration. This is used to check if `Self` was used in the trait - // declaration. - // - // If `any`where in the `trait_sem_ty` the `self_ty` was used verbatim (as opposed - // to `Self`), we want to skip linting that type and all subtypes of it. This - // avoids suggestions to e.g. replace `Vec<u8>` with `Vec<Self>`, in an `impl Trait - // for u8`, when the trait always uses `Vec<u8>`. - // - // See also https://github.com/rust-lang/rust-clippy/issues/2894. - for (impl_hir_ty, trait_sem_ty) in impl_inputs_outputs.zip(trait_method_sig.inputs_and_output) { - if trait_sem_ty.walk().any(|inner| inner == self_ty.into()) { - let mut visitor = SkipTyCollector::default(); - visitor.visit_ty(impl_hir_ty); - types_to_skip.extend(visitor.types_to_skip); - } + // `impl_hir_ty` (of type `hir::Ty`) represents the type written in the signature. + // + // `trait_sem_ty` (of type `ty::Ty`) is the semantic type for the signature in the + // trait declaration. This is used to check if `Self` was used in the trait + // declaration. + // + // If `any`where in the `trait_sem_ty` the `self_ty` was used verbatim (as opposed + // to `Self`), we want to skip linting that type and all subtypes of it. This + // avoids suggestions to e.g. replace `Vec<u8>` with `Vec<Self>`, in an `impl Trait + // for u8`, when the trait always uses `Vec<u8>`. + // + // See also https://github.com/rust-lang/rust-clippy/issues/2894. + for (impl_hir_ty, trait_sem_ty) in impl_inputs_outputs.zip(trait_method_sig.inputs_and_output) { + if trait_sem_ty.walk().any(|inner| inner == self_ty.into()) { + let mut visitor = SkipTyCollector::default(); + visitor.visit_ty(impl_hir_ty); + types_to_skip.extend(visitor.types_to_skip); } } } @@ -203,41 +208,38 @@ impl<'tcx> LateLintPass<'tcx> for UseSelf { } fn check_ty(&mut self, cx: &LateContext<'_>, hir_ty: &hir::Ty<'_>) { - if_chain! { - if !hir_ty.span.from_expansion(); - if self.msrv.meets(msrvs::TYPE_ALIAS_ENUM_VARIANTS); - if let Some(&StackItem::Check { + if !hir_ty.span.from_expansion() + && self.msrv.meets(msrvs::TYPE_ALIAS_ENUM_VARIANTS) + && let Some(&StackItem::Check { impl_id, in_body, ref types_to_skip, - }) = self.stack.last(); - if let TyKind::Path(QPath::Resolved(_, path)) = hir_ty.kind; - if !matches!( + }) = self.stack.last() + && let TyKind::Path(QPath::Resolved(_, path)) = hir_ty.kind + && !matches!( path.res, - Res::SelfTyParam { .. } - | Res::SelfTyAlias { .. } - | Res::Def(DefKind::TyParam, _) - ); - if !types_to_skip.contains(&hir_ty.hir_id); - let ty = if in_body > 0 { + Res::SelfTyParam { .. } | Res::SelfTyAlias { .. } | Res::Def(DefKind::TyParam, _) + ) + && !types_to_skip.contains(&hir_ty.hir_id) + && let ty = if in_body > 0 { cx.typeck_results().node_type(hir_ty.hir_id) } else { hir_ty_to_ty(cx.tcx, hir_ty) - }; - if same_type_and_consts(ty, cx.tcx.type_of(impl_id).instantiate_identity()); - then { - span_lint(cx, hir_ty.span); } + && same_type_and_consts(ty, cx.tcx.type_of(impl_id).instantiate_identity()) + { + span_lint(cx, hir_ty.span); } } fn check_expr(&mut self, cx: &LateContext<'_>, expr: &Expr<'_>) { - if_chain! { - if !expr.span.from_expansion(); - if self.msrv.meets(msrvs::TYPE_ALIAS_ENUM_VARIANTS); - if let Some(&StackItem::Check { impl_id, .. }) = self.stack.last(); - if cx.typeck_results().expr_ty(expr) == cx.tcx.type_of(impl_id).instantiate_identity(); - then {} else { return; } + if !expr.span.from_expansion() + && self.msrv.meets(msrvs::TYPE_ALIAS_ENUM_VARIANTS) + && let Some(&StackItem::Check { impl_id, .. }) = self.stack.last() + && cx.typeck_results().expr_ty(expr) == cx.tcx.type_of(impl_id).instantiate_identity() + { + } else { + return; } match expr.kind { ExprKind::Struct(QPath::Resolved(_, path), ..) => check_path(cx, path), @@ -252,18 +254,16 @@ impl<'tcx> LateLintPass<'tcx> for UseSelf { } fn check_pat(&mut self, cx: &LateContext<'_>, pat: &Pat<'_>) { - if_chain! { - if !pat.span.from_expansion(); - if self.msrv.meets(msrvs::TYPE_ALIAS_ENUM_VARIANTS); - if let Some(&StackItem::Check { impl_id, .. }) = self.stack.last(); + if !pat.span.from_expansion() + && self.msrv.meets(msrvs::TYPE_ALIAS_ENUM_VARIANTS) + && let Some(&StackItem::Check { impl_id, .. }) = self.stack.last() // get the path from the pattern - if let PatKind::Path(QPath::Resolved(_, path)) + && let PatKind::Path(QPath::Resolved(_, path)) | PatKind::TupleStruct(QPath::Resolved(_, path), _, _) - | PatKind::Struct(QPath::Resolved(_, path), _, _) = pat.kind; - if cx.typeck_results().pat_ty(pat) == cx.tcx.type_of(impl_id).instantiate_identity(); - then { - check_path(cx, path); - } + | PatKind::Struct(QPath::Resolved(_, path), _, _) = pat.kind + && cx.typeck_results().pat_ty(pat) == cx.tcx.type_of(impl_id).instantiate_identity() + { + check_path(cx, path); } } diff --git a/src/tools/clippy/clippy_lints/src/useless_conversion.rs b/src/tools/clippy/clippy_lints/src/useless_conversion.rs index 28f1d487e..2e0a0f6cb 100644 --- a/src/tools/clippy/clippy_lints/src/useless_conversion.rs +++ b/src/tools/clippy/clippy_lints/src/useless_conversion.rs @@ -3,9 +3,7 @@ use clippy_utils::source::{snippet, snippet_with_applicability, snippet_with_con use clippy_utils::sugg::Sugg; use clippy_utils::ty::{is_copy, is_type_diagnostic_item, same_type_and_consts}; use clippy_utils::{get_parent_expr, is_trait_method, is_ty_alias, path_to_local}; -use if_chain::if_chain; use rustc_errors::Applicability; -use rustc_hir::def::DefKind; use rustc_hir::def_id::DefId; use rustc_hir::{BindingAnnotation, Expr, ExprKind, HirId, MatchSource, Node, PatKind}; use rustc_infer::infer::TyCtxtInferExt; @@ -13,7 +11,7 @@ use rustc_infer::traits::Obligation; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::traits::ObligationCause; use rustc_middle::ty::{self, EarlyBinder, GenericArg, GenericArgsRef, Ty, TypeVisitableExt}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::{sym, Span}; use rustc_trait_selection::traits::query::evaluate_obligation::InferCtxtExt; @@ -209,7 +207,7 @@ impl<'tcx> LateLintPass<'tcx> for UselessConversion { && let Some(did) = cx.qpath_res(qpath, recv.hir_id).opt_def_id() // make sure that the path indeed points to a fn-like item, so that // `fn_sig` does not ICE. (see #11065) - && cx.tcx.opt_def_kind(did).is_some_and(DefKind::is_fn_like) => + && cx.tcx.def_kind(did).is_fn_like() => { Some(( did, @@ -283,7 +281,7 @@ impl<'tcx> LateLintPass<'tcx> for UselessConversion { } if let Some(id) = path_to_local(recv) - && let Node::Pat(pat) = cx.tcx.hir().get(id) + && let Node::Pat(pat) = cx.tcx.hir_node(id) && let PatKind::Binding(ann, ..) = pat.kind && ann != BindingAnnotation::MUT { @@ -311,76 +309,63 @@ impl<'tcx> LateLintPass<'tcx> for UselessConversion { ); } } - if_chain! { - if is_trait_method(cx, e, sym::TryInto) && name.ident.name == sym::try_into; - let a = cx.typeck_results().expr_ty(e); - let b = cx.typeck_results().expr_ty(recv); - if is_type_diagnostic_item(cx, a, sym::Result); - if let ty::Adt(_, args) = a.kind(); - if let Some(a_type) = args.types().next(); - if same_type_and_consts(a_type, b); + if is_trait_method(cx, e, sym::TryInto) + && name.ident.name == sym::try_into + && let a = cx.typeck_results().expr_ty(e) + && let b = cx.typeck_results().expr_ty(recv) + && is_type_diagnostic_item(cx, a, sym::Result) + && let ty::Adt(_, args) = a.kind() + && let Some(a_type) = args.types().next() + && same_type_and_consts(a_type, b) + { + span_lint_and_help( + cx, + USELESS_CONVERSION, + e.span, + &format!("useless conversion to the same type: `{b}`"), + None, + "consider removing `.try_into()`", + ); + } + }, - then { + ExprKind::Call(path, [arg]) => { + if let ExprKind::Path(ref qpath) = path.kind + && let Some(def_id) = cx.qpath_res(qpath, path.hir_id).opt_def_id() + && !is_ty_alias(qpath) + { + let a = cx.typeck_results().expr_ty(e); + let b = cx.typeck_results().expr_ty(arg); + if cx.tcx.is_diagnostic_item(sym::try_from_fn, def_id) + && is_type_diagnostic_item(cx, a, sym::Result) + && let ty::Adt(_, args) = a.kind() + && let Some(a_type) = args.types().next() + && same_type_and_consts(a_type, b) + { + let hint = format!("consider removing `{}()`", snippet(cx, path.span, "TryFrom::try_from")); span_lint_and_help( cx, USELESS_CONVERSION, e.span, &format!("useless conversion to the same type: `{b}`"), None, - "consider removing `.try_into()`", + &hint, ); } - } - }, - - ExprKind::Call(path, [arg]) => { - if_chain! { - if let ExprKind::Path(ref qpath) = path.kind; - if let Some(def_id) = cx.qpath_res(qpath, path.hir_id).opt_def_id(); - if !is_ty_alias(qpath); - then { - let a = cx.typeck_results().expr_ty(e); - let b = cx.typeck_results().expr_ty(arg); - if_chain! { - if cx.tcx.is_diagnostic_item(sym::try_from_fn, def_id); - if is_type_diagnostic_item(cx, a, sym::Result); - if let ty::Adt(_, args) = a.kind(); - if let Some(a_type) = args.types().next(); - if same_type_and_consts(a_type, b); - then { - let hint = format!("consider removing `{}()`", snippet(cx, path.span, "TryFrom::try_from")); - span_lint_and_help( - cx, - USELESS_CONVERSION, - e.span, - &format!("useless conversion to the same type: `{b}`"), - None, - &hint, - ); - } - } - - if_chain! { - if cx.tcx.is_diagnostic_item(sym::from_fn, def_id); - if same_type_and_consts(a, b); - - then { - let mut app = Applicability::MachineApplicable; - let sugg = Sugg::hir_with_context(cx, arg, e.span.ctxt(), "<expr>", &mut app).maybe_par(); - let sugg_msg = - format!("consider removing `{}()`", snippet(cx, path.span, "From::from")); - span_lint_and_sugg( - cx, - USELESS_CONVERSION, - e.span, - &format!("useless conversion to the same type: `{b}`"), - &sugg_msg, - sugg.to_string(), - app, - ); - } - } + if cx.tcx.is_diagnostic_item(sym::from_fn, def_id) && same_type_and_consts(a, b) { + let mut app = Applicability::MachineApplicable; + let sugg = Sugg::hir_with_context(cx, arg, e.span.ctxt(), "<expr>", &mut app).maybe_par(); + let sugg_msg = format!("consider removing `{}()`", snippet(cx, path.span, "From::from")); + span_lint_and_sugg( + cx, + USELESS_CONVERSION, + e.span, + &format!("useless conversion to the same type: `{b}`"), + &sugg_msg, + sugg.to_string(), + app, + ); } } }, diff --git a/src/tools/clippy/clippy_lints/src/utils/author.rs b/src/tools/clippy/clippy_lints/src/utils/author.rs index 152248afc..e83c04eda 100644 --- a/src/tools/clippy/clippy_lints/src/utils/author.rs +++ b/src/tools/clippy/clippy_lints/src/utils/author.rs @@ -7,7 +7,7 @@ use rustc_ast::LitIntType; use rustc_data_structures::fx::FxHashMap; use rustc_hir as hir; use rustc_hir::{ - ArrayLen, BindingAnnotation, Closure, ExprKind, FnRetTy, HirId, Lit, PatKind, QPath, StmtKind, TyKind, CaptureBy + ArrayLen, BindingAnnotation, CaptureBy, Closure, ExprKind, FnRetTy, HirId, Lit, PatKind, QPath, StmtKind, TyKind, }; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_session::declare_lint_pass; @@ -629,6 +629,7 @@ impl<'a, 'tcx> PrintVisitor<'a, 'tcx> { match pat.value.kind { PatKind::Wild => kind!("Wild"), + PatKind::Never => kind!("Never"), PatKind::Binding(ann, _, name, sub) => { bind!(self, name); opt_bind!(self, sub); diff --git a/src/tools/clippy/clippy_lints/src/utils/internal_lints.rs b/src/tools/clippy/clippy_lints/src/utils/internal_lints.rs index ddcb9f27c..877a77fd6 100644 --- a/src/tools/clippy/clippy_lints/src/utils/internal_lints.rs +++ b/src/tools/clippy/clippy_lints/src/utils/internal_lints.rs @@ -1,7 +1,6 @@ pub mod almost_standard_lint_formulation; pub mod collapsible_calls; pub mod compiler_lint_functions; -pub mod if_chain_style; pub mod interning_defined_symbol; pub mod invalid_paths; pub mod lint_without_lint_pass; diff --git a/src/tools/clippy/clippy_lints/src/utils/internal_lints/almost_standard_lint_formulation.rs b/src/tools/clippy/clippy_lints/src/utils/internal_lints/almost_standard_lint_formulation.rs index d78f67c05..5ddedb24b 100644 --- a/src/tools/clippy/clippy_lints/src/utils/internal_lints/almost_standard_lint_formulation.rs +++ b/src/tools/clippy/clippy_lints/src/utils/internal_lints/almost_standard_lint_formulation.rs @@ -4,7 +4,7 @@ use regex::Regex; use rustc_ast as ast; use rustc_hir::{Item, ItemKind, Mutability}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/utils/internal_lints/collapsible_calls.rs b/src/tools/clippy/clippy_lints/src/utils/internal_lints/collapsible_calls.rs index d7666b77f..7c70d3f45 100644 --- a/src/tools/clippy/clippy_lints/src/utils/internal_lints/collapsible_calls.rs +++ b/src/tools/clippy/clippy_lints/src/utils/internal_lints/collapsible_calls.rs @@ -1,12 +1,11 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet; use clippy_utils::{is_expr_path_def_path, is_lint_allowed, peel_blocks_with_stmt, SpanlessEq}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_hir::{Closure, Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use std::borrow::{Borrow, Cow}; @@ -78,45 +77,43 @@ impl<'tcx> LateLintPass<'tcx> for CollapsibleCalls { return; } - if_chain! { - if let ExprKind::Call(func, and_then_args) = expr.kind; - if is_expr_path_def_path(cx, func, &["clippy_utils", "diagnostics", "span_lint_and_then"]); - if and_then_args.len() == 5; - if let ExprKind::Closure(&Closure { body, .. }) = &and_then_args[4].kind; - let body = cx.tcx.hir().body(body); - let only_expr = peel_blocks_with_stmt(body.value); - if let ExprKind::MethodCall(ps, recv, span_call_args, _) = &only_expr.kind; - if let ExprKind::Path(..) = recv.kind; - then { - let and_then_snippets = get_and_then_snippets(cx, and_then_args); - let mut sle = SpanlessEq::new(cx).deny_side_effects(); - match ps.ident.as_str() { - "span_suggestion" if sle.eq_expr(&and_then_args[2], &span_call_args[0]) => { - suggest_suggestion( - cx, - expr, - &and_then_snippets, - &span_suggestion_snippets(cx, span_call_args), - ); - }, - "span_help" if sle.eq_expr(&and_then_args[2], &span_call_args[0]) => { - let help_snippet = snippet(cx, span_call_args[1].span, r#""...""#); - suggest_help(cx, expr, &and_then_snippets, help_snippet.borrow(), true); - }, - "span_note" if sle.eq_expr(&and_then_args[2], &span_call_args[0]) => { - let note_snippet = snippet(cx, span_call_args[1].span, r#""...""#); - suggest_note(cx, expr, &and_then_snippets, note_snippet.borrow(), true); - }, - "help" => { - let help_snippet = snippet(cx, span_call_args[0].span, r#""...""#); - suggest_help(cx, expr, &and_then_snippets, help_snippet.borrow(), false); - }, - "note" => { - let note_snippet = snippet(cx, span_call_args[0].span, r#""...""#); - suggest_note(cx, expr, &and_then_snippets, note_snippet.borrow(), false); - }, - _ => (), - } + if let ExprKind::Call(func, and_then_args) = expr.kind + && is_expr_path_def_path(cx, func, &["clippy_utils", "diagnostics", "span_lint_and_then"]) + && and_then_args.len() == 5 + && let ExprKind::Closure(&Closure { body, .. }) = &and_then_args[4].kind + && let body = cx.tcx.hir().body(body) + && let only_expr = peel_blocks_with_stmt(body.value) + && let ExprKind::MethodCall(ps, recv, span_call_args, _) = &only_expr.kind + && let ExprKind::Path(..) = recv.kind + { + let and_then_snippets = get_and_then_snippets(cx, and_then_args); + let mut sle = SpanlessEq::new(cx).deny_side_effects(); + match ps.ident.as_str() { + "span_suggestion" if sle.eq_expr(&and_then_args[2], &span_call_args[0]) => { + suggest_suggestion( + cx, + expr, + &and_then_snippets, + &span_suggestion_snippets(cx, span_call_args), + ); + }, + "span_help" if sle.eq_expr(&and_then_args[2], &span_call_args[0]) => { + let help_snippet = snippet(cx, span_call_args[1].span, r#""...""#); + suggest_help(cx, expr, &and_then_snippets, help_snippet.borrow(), true); + }, + "span_note" if sle.eq_expr(&and_then_args[2], &span_call_args[0]) => { + let note_snippet = snippet(cx, span_call_args[1].span, r#""...""#); + suggest_note(cx, expr, &and_then_snippets, note_snippet.borrow(), true); + }, + "help" => { + let help_snippet = snippet(cx, span_call_args[0].span, r#""...""#); + suggest_help(cx, expr, &and_then_snippets, help_snippet.borrow(), false); + }, + "note" => { + let note_snippet = snippet(cx, span_call_args[0].span, r#""...""#); + suggest_note(cx, expr, &and_then_snippets, note_snippet.borrow(), false); + }, + _ => (), } } } diff --git a/src/tools/clippy/clippy_lints/src/utils/internal_lints/compiler_lint_functions.rs b/src/tools/clippy/clippy_lints/src/utils/internal_lints/compiler_lint_functions.rs index cacd05262..5059712d6 100644 --- a/src/tools/clippy/clippy_lints/src/utils/internal_lints/compiler_lint_functions.rs +++ b/src/tools/clippy/clippy_lints/src/utils/internal_lints/compiler_lint_functions.rs @@ -1,11 +1,10 @@ use clippy_utils::diagnostics::span_lint_and_help; use clippy_utils::ty::match_type; use clippy_utils::{is_lint_allowed, paths}; -use if_chain::if_chain; use rustc_data_structures::fx::FxHashMap; use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; declare_clippy_lint! { /// ### What it does @@ -56,22 +55,20 @@ impl<'tcx> LateLintPass<'tcx> for CompilerLintFunctions { return; } - if_chain! { - if let ExprKind::MethodCall(path, self_arg, _, _) = &expr.kind; - let fn_name = path.ident; - if let Some(sugg) = self.map.get(fn_name.as_str()); - let ty = cx.typeck_results().expr_ty(self_arg).peel_refs(); - if match_type(cx, ty, &paths::EARLY_CONTEXT) || match_type(cx, ty, &paths::LATE_CONTEXT); - then { - span_lint_and_help( - cx, - COMPILER_LINT_FUNCTIONS, - path.ident.span, - "usage of a compiler lint function", - None, - &format!("please use the Clippy variant of this function: `{sugg}`"), - ); - } + if let ExprKind::MethodCall(path, self_arg, _, _) = &expr.kind + && let fn_name = path.ident + && let Some(sugg) = self.map.get(fn_name.as_str()) + && let ty = cx.typeck_results().expr_ty(self_arg).peel_refs() + && (match_type(cx, ty, &paths::EARLY_CONTEXT) || match_type(cx, ty, &paths::LATE_CONTEXT)) + { + span_lint_and_help( + cx, + COMPILER_LINT_FUNCTIONS, + path.ident.span, + "usage of a compiler lint function", + None, + &format!("please use the Clippy variant of this function: `{sugg}`"), + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/utils/internal_lints/if_chain_style.rs b/src/tools/clippy/clippy_lints/src/utils/internal_lints/if_chain_style.rs deleted file mode 100644 index 8cdd5ea89..000000000 --- a/src/tools/clippy/clippy_lints/src/utils/internal_lints/if_chain_style.rs +++ /dev/null @@ -1,166 +0,0 @@ -use clippy_utils::diagnostics::{span_lint, span_lint_and_then}; -use clippy_utils::{higher, is_else_clause, is_expn_of}; -use if_chain::if_chain; -use rustc_hir as hir; -use rustc_hir::{BinOpKind, Block, Expr, ExprKind, HirId, Local, Node, Stmt, StmtKind}; -use rustc_lint::{LateContext, LateLintPass, LintContext}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; -use rustc_span::{BytePos, Span}; - -declare_clippy_lint! { - /// Finds unidiomatic usage of `if_chain!` - pub IF_CHAIN_STYLE, - internal, - "non-idiomatic `if_chain!` usage" -} - -declare_lint_pass!(IfChainStyle => [IF_CHAIN_STYLE]); - -impl<'tcx> LateLintPass<'tcx> for IfChainStyle { - fn check_block(&mut self, cx: &LateContext<'tcx>, block: &'tcx hir::Block<'_>) { - let (local, after, if_chain_span) = if_chain! { - if let [Stmt { kind: StmtKind::Local(local), .. }, after @ ..] = block.stmts; - if let Some(if_chain_span) = is_expn_of(block.span, "if_chain"); - then { (local, after, if_chain_span) } else { return } - }; - if is_first_if_chain_expr(cx, block.hir_id, if_chain_span) { - span_lint( - cx, - IF_CHAIN_STYLE, - if_chain_local_span(cx, local, if_chain_span), - "`let` expression should be above the `if_chain!`", - ); - } else if local.span.eq_ctxt(block.span) && is_if_chain_then(after, block.expr, if_chain_span) { - span_lint( - cx, - IF_CHAIN_STYLE, - if_chain_local_span(cx, local, if_chain_span), - "`let` expression should be inside `then { .. }`", - ); - } - } - - fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx hir::Expr<'_>) { - let (cond, then, els) = if let Some(higher::IfOrIfLet { cond, r#else, then }) = higher::IfOrIfLet::hir(expr) { - (cond, then, r#else.is_some()) - } else { - return; - }; - let ExprKind::Block(then_block, _) = then.kind else { - return; - }; - let if_chain_span = is_expn_of(expr.span, "if_chain"); - if !els { - check_nested_if_chains(cx, expr, then_block, if_chain_span); - } - let Some(if_chain_span) = if_chain_span else { return }; - // check for `if a && b;` - if_chain! { - if let ExprKind::Binary(op, _, _) = cond.kind; - if op.node == BinOpKind::And; - if cx.sess().source_map().is_multiline(cond.span); - then { - span_lint(cx, IF_CHAIN_STYLE, cond.span, "`if a && b;` should be `if a; if b;`"); - } - } - if is_first_if_chain_expr(cx, expr.hir_id, if_chain_span) - && is_if_chain_then(then_block.stmts, then_block.expr, if_chain_span) - { - span_lint(cx, IF_CHAIN_STYLE, expr.span, "`if_chain!` only has one `if`"); - } - } -} - -fn check_nested_if_chains( - cx: &LateContext<'_>, - if_expr: &Expr<'_>, - then_block: &Block<'_>, - if_chain_span: Option<Span>, -) { - #[rustfmt::skip] - let (head, tail) = match *then_block { - Block { stmts, expr: Some(tail), .. } => (stmts, tail), - Block { - stmts: &[ - ref head @ .., - Stmt { kind: StmtKind::Expr(tail) | StmtKind::Semi(tail), .. } - ], - .. - } => (head, tail), - _ => return, - }; - if_chain! { - if let Some(higher::IfOrIfLet { r#else: None, .. }) = higher::IfOrIfLet::hir(tail); - let sm = cx.sess().source_map(); - if head - .iter() - .all(|stmt| matches!(stmt.kind, StmtKind::Local(..)) && !sm.is_multiline(stmt.span)); - if if_chain_span.is_some() || !is_else_clause(cx.tcx, if_expr); - then { - } else { - return; - } - } - let (span, msg) = match (if_chain_span, is_expn_of(tail.span, "if_chain")) { - (None, Some(_)) => (if_expr.span, "this `if` can be part of the inner `if_chain!`"), - (Some(_), None) => (tail.span, "this `if` can be part of the outer `if_chain!`"), - (Some(a), Some(b)) if a != b => (b, "this `if_chain!` can be merged with the outer `if_chain!`"), - _ => return, - }; - span_lint_and_then(cx, IF_CHAIN_STYLE, span, msg, |diag| { - let (span, msg) = match head { - [] => return, - [stmt] => (stmt.span, "this `let` statement can also be in the `if_chain!`"), - [a, .., b] => ( - a.span.to(b.span), - "these `let` statements can also be in the `if_chain!`", - ), - }; - diag.span_help(span, msg); - }); -} - -fn is_first_if_chain_expr(cx: &LateContext<'_>, hir_id: HirId, if_chain_span: Span) -> bool { - cx.tcx - .hir() - .parent_iter(hir_id) - .find(|(_, node)| { - #[rustfmt::skip] - !matches!(node, Node::Expr(Expr { kind: ExprKind::Block(..), .. }) | Node::Stmt(_)) - }) - .map_or(false, |(id, _)| { - is_expn_of(cx.tcx.hir().span(id), "if_chain") != Some(if_chain_span) - }) -} - -/// Checks a trailing slice of statements and expression of a `Block` to see if they are part -/// of the `then {..}` portion of an `if_chain!` -fn is_if_chain_then(stmts: &[Stmt<'_>], expr: Option<&Expr<'_>>, if_chain_span: Span) -> bool { - let span = if let [stmt, ..] = stmts { - stmt.span - } else if let Some(expr) = expr { - expr.span - } else { - // empty `then {}` - return true; - }; - is_expn_of(span, "if_chain").map_or(true, |span| span != if_chain_span) -} - -/// Creates a `Span` for `let x = ..;` in an `if_chain!` call. -fn if_chain_local_span(cx: &LateContext<'_>, local: &Local<'_>, if_chain_span: Span) -> Span { - let mut span = local.pat.span; - if let Some(init) = local.init { - span = span.to(init.span); - } - span.adjust(if_chain_span.ctxt().outer_expn()); - let sm = cx.sess().source_map(); - let span = sm.span_extend_to_prev_str(span, "let", false, true).unwrap_or(span); - let span = sm.span_extend_to_next_char(span, ';', false); - Span::new( - span.lo() - BytePos(3), - span.hi() + BytePos(1), - span.ctxt(), - span.parent(), - ) -} diff --git a/src/tools/clippy/clippy_lints/src/utils/internal_lints/interning_defined_symbol.rs b/src/tools/clippy/clippy_lints/src/utils/internal_lints/interning_defined_symbol.rs index fc9afe5ca..07879e81f 100644 --- a/src/tools/clippy/clippy_lints/src/utils/internal_lints/interning_defined_symbol.rs +++ b/src/tools/clippy/clippy_lints/src/utils/internal_lints/interning_defined_symbol.rs @@ -3,7 +3,6 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet; use clippy_utils::ty::match_type; use clippy_utils::{def_path_def_ids, is_expn_of, match_def_path, paths}; -use if_chain::if_chain; use rustc_data_structures::fx::FxHashMap; use rustc_errors::Applicability; use rustc_hir::def::{DefKind, Res}; @@ -12,7 +11,7 @@ use rustc_hir::{BinOpKind, Expr, ExprKind, UnOp}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::mir::ConstValue; use rustc_middle::ty; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::sym; use rustc_span::symbol::Symbol; @@ -77,15 +76,13 @@ impl<'tcx> LateLintPass<'tcx> for InterningDefinedSymbol { for &module in &[&paths::KW_MODULE, &paths::SYM_MODULE] { for def_id in def_path_def_ids(cx, module) { for item in cx.tcx.module_children(def_id) { - if_chain! { - if let Res::Def(DefKind::Const, item_def_id) = item.res; - let ty = cx.tcx.type_of(item_def_id).instantiate_identity(); - if match_type(cx, ty, &paths::SYMBOL); - if let Ok(ConstValue::Scalar(value)) = cx.tcx.const_eval_poly(item_def_id); - if let Ok(value) = value.to_u32(); - then { - self.symbol_map.insert(value, item_def_id); - } + if let Res::Def(DefKind::Const, item_def_id) = item.res + && let ty = cx.tcx.type_of(item_def_id).instantiate_identity() + && match_type(cx, ty, &paths::SYMBOL) + && let Ok(ConstValue::Scalar(value)) = cx.tcx.const_eval_poly(item_def_id) + && let Ok(value) = value.to_u32() + { + self.symbol_map.insert(value, item_def_id); } } } @@ -93,24 +90,22 @@ impl<'tcx> LateLintPass<'tcx> for InterningDefinedSymbol { } fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) { - if_chain! { - if let ExprKind::Call(func, [arg]) = &expr.kind; - if let ty::FnDef(def_id, _) = cx.typeck_results().expr_ty(func).kind(); - if match_def_path(cx, *def_id, &paths::SYMBOL_INTERN); - if let Some(Constant::Str(arg)) = constant_simple(cx, cx.typeck_results(), arg); - let value = Symbol::intern(&arg).as_u32(); - if let Some(&def_id) = self.symbol_map.get(&value); - then { - span_lint_and_sugg( - cx, - INTERNING_DEFINED_SYMBOL, - is_expn_of(expr.span, "sym").unwrap_or(expr.span), - "interning a defined symbol", - "try", - cx.tcx.def_path_str(def_id), - Applicability::MachineApplicable, - ); - } + if let ExprKind::Call(func, [arg]) = &expr.kind + && let ty::FnDef(def_id, _) = cx.typeck_results().expr_ty(func).kind() + && match_def_path(cx, *def_id, &paths::SYMBOL_INTERN) + && let Some(Constant::Str(arg)) = constant_simple(cx, cx.typeck_results(), arg) + && let value = Symbol::intern(&arg).as_u32() + && let Some(&def_id) = self.symbol_map.get(&value) + { + span_lint_and_sugg( + cx, + INTERNING_DEFINED_SYMBOL, + is_expn_of(expr.span, "sym").unwrap_or(expr.span), + "interning a defined symbol", + "try", + cx.tcx.def_path_str(def_id), + Applicability::MachineApplicable, + ); } if let ExprKind::Binary(op, left, right) = expr.kind { if matches!(op.node, BinOpKind::Eq | BinOpKind::Ne) { @@ -163,27 +158,28 @@ impl InterningDefinedSymbol { fn symbol_str_expr<'tcx>(&self, expr: &'tcx Expr<'tcx>, cx: &LateContext<'tcx>) -> Option<SymbolStrExpr<'tcx>> { static IDENT_STR_PATHS: &[&[&str]] = &[&paths::IDENT_AS_STR]; static SYMBOL_STR_PATHS: &[&[&str]] = &[&paths::SYMBOL_AS_STR, &paths::SYMBOL_TO_IDENT_STRING]; - let call = if_chain! { - if let ExprKind::AddrOf(_, _, e) = expr.kind; - if let ExprKind::Unary(UnOp::Deref, e) = e.kind; - then { e } else { expr } + let call = if let ExprKind::AddrOf(_, _, e) = expr.kind + && let ExprKind::Unary(UnOp::Deref, e) = e.kind + { + e + } else { + expr }; - if_chain! { + if let ExprKind::MethodCall(_, item, [], _) = call.kind // is a method call - if let ExprKind::MethodCall(_, item, [], _) = call.kind; - if let Some(did) = cx.typeck_results().type_dependent_def_id(call.hir_id); - let ty = cx.typeck_results().expr_ty(item); + && let Some(did) = cx.typeck_results().type_dependent_def_id(call.hir_id) + && let ty = cx.typeck_results().expr_ty(item) // ...on either an Ident or a Symbol - if let Some(is_ident) = if match_type(cx, ty, &paths::SYMBOL) { + && let Some(is_ident) = if match_type(cx, ty, &paths::SYMBOL) { Some(false) } else if match_type(cx, ty, &paths::IDENT) { Some(true) } else { None - }; + } // ...which converts it to a string - let paths = if is_ident { IDENT_STR_PATHS } else { SYMBOL_STR_PATHS }; - if let Some(is_to_owned) = paths + && let paths = if is_ident { IDENT_STR_PATHS } else { SYMBOL_STR_PATHS } + && let Some(is_to_owned) = paths .iter() .find_map(|path| if match_def_path(cx, did, path) { Some(path == &paths::SYMBOL_TO_IDENT_STRING) @@ -194,14 +190,13 @@ impl InterningDefinedSymbol { Some(true) } else { None - }); - then { - return Some(SymbolStrExpr::Expr { - item, - is_ident, - is_to_owned, - }); - } + }) + { + return Some(SymbolStrExpr::Expr { + item, + is_ident, + is_to_owned, + }); } // is a string constant if let Some(Constant::Str(s)) = constant_simple(cx, cx.typeck_results(), expr) { diff --git a/src/tools/clippy/clippy_lints/src/utils/internal_lints/invalid_paths.rs b/src/tools/clippy/clippy_lints/src/utils/internal_lints/invalid_paths.rs index 250772238..4fb615e1d 100644 --- a/src/tools/clippy/clippy_lints/src/utils/internal_lints/invalid_paths.rs +++ b/src/tools/clippy/clippy_lints/src/utils/internal_lints/invalid_paths.rs @@ -1,14 +1,13 @@ use clippy_utils::consts::{constant_simple, Constant}; use clippy_utils::def_path_res; use clippy_utils::diagnostics::span_lint; -use if_chain::if_chain; use rustc_hir as hir; use rustc_hir::def::DefKind; use rustc_hir::Item; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::fast_reject::SimplifiedType; use rustc_middle::ty::FloatTy; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::symbol::Symbol; declare_clippy_lint! { @@ -31,13 +30,12 @@ impl<'tcx> LateLintPass<'tcx> for InvalidPaths { fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx Item<'_>) { let local_def_id = &cx.tcx.parent_module(item.hir_id()); let mod_name = &cx.tcx.item_name(local_def_id.to_def_id()); - if_chain! { - if mod_name.as_str() == "paths"; - if let hir::ItemKind::Const(.., body_id) = item.kind; - let body = cx.tcx.hir().body(body_id); - let typeck_results = cx.tcx.typeck_body(body_id); - if let Some(Constant::Vec(path)) = constant_simple(cx, typeck_results, body.value); - if let Some(path) = path + if mod_name.as_str() == "paths" + && let hir::ItemKind::Const(.., body_id) = item.kind + && let body = cx.tcx.hir().body(body_id) + && let typeck_results = cx.tcx.typeck_body(body_id) + && let Some(Constant::Vec(path)) = constant_simple(cx, typeck_results, body.value) + && let Some(path) = path .iter() .map(|x| { if let Constant::Str(s) = x { @@ -46,11 +44,10 @@ impl<'tcx> LateLintPass<'tcx> for InvalidPaths { None } }) - .collect::<Option<Vec<&str>>>(); - if !check_path(cx, &path[..]); - then { - span_lint(cx, INVALID_PATHS, item.span, "invalid path"); - } + .collect::<Option<Vec<&str>>>() + && !check_path(cx, &path[..]) + { + span_lint(cx, INVALID_PATHS, item.span, "invalid path"); } } } diff --git a/src/tools/clippy/clippy_lints/src/utils/internal_lints/lint_without_lint_pass.rs b/src/tools/clippy/clippy_lints/src/utils/internal_lints/lint_without_lint_pass.rs index 00e352961..370ed430b 100644 --- a/src/tools/clippy/clippy_lints/src/utils/internal_lints/lint_without_lint_pass.rs +++ b/src/tools/clippy/clippy_lints/src/utils/internal_lints/lint_without_lint_pass.rs @@ -2,7 +2,6 @@ use crate::utils::internal_lints::metadata_collector::is_deprecated_lint; use clippy_utils::diagnostics::{span_lint, span_lint_and_help}; use clippy_utils::macros::root_macro_call_first_node; use clippy_utils::{is_lint_allowed, match_def_path, paths}; -use if_chain::if_chain; use rustc_ast::ast::LitKind; use rustc_data_structures::fx::{FxHashMap, FxHashSet}; use rustc_hir::def::{DefKind, Res}; @@ -12,7 +11,7 @@ use rustc_hir::{ExprKind, HirId, Item, MutTy, Mutability, Path, TyKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::hir::nested_filter; use rustc_semver::RustcVersion; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::source_map::Spanned; use rustc_span::symbol::Symbol; use rustc_span::{sym, Span}; @@ -309,14 +308,16 @@ fn check_invalid_clippy_version_attribute(cx: &LateContext<'_>, item: &'_ Item<' pub(super) fn extract_clippy_version_value(cx: &LateContext<'_>, item: &'_ Item<'_>) -> Option<Symbol> { let attrs = cx.tcx.hir().attrs(item.hir_id()); attrs.iter().find_map(|attr| { - if_chain! { + if let ast::AttrKind::Normal(ref attr_kind) = &attr.kind // Identify attribute - if let ast::AttrKind::Normal(ref attr_kind) = &attr.kind; - if let [tool_name, attr_name] = &attr_kind.item.path.segments[..]; - if tool_name.ident.name == sym::clippy; - if attr_name.ident.name == sym::version; - if let Some(version) = attr.value_str(); - then { Some(version) } else { None } + && let [tool_name, attr_name] = &attr_kind.item.path.segments[..] + && tool_name.ident.name == sym::clippy + && attr_name.ident.name == sym::version + && let Some(version) = attr.value_str() + { + Some(version) + } else { + None } }) } diff --git a/src/tools/clippy/clippy_lints/src/utils/internal_lints/metadata_collector.rs b/src/tools/clippy/clippy_lints/src/utils/internal_lints/metadata_collector.rs index 51abe0c1d..fae1b90ac 100644 --- a/src/tools/clippy/clippy_lints/src/utils/internal_lints/metadata_collector.rs +++ b/src/tools/clippy/clippy_lints/src/utils/internal_lints/metadata_collector.rs @@ -14,27 +14,26 @@ use clippy_config::{get_configuration_metadata, ClippyConfiguration}; use clippy_utils::diagnostics::span_lint; use clippy_utils::ty::{match_type, walk_ptrs_ty_depth}; use clippy_utils::{last_path_segment, match_def_path, match_function_call, match_path, paths}; -use if_chain::if_chain; use itertools::Itertools; use rustc_ast as ast; use rustc_data_structures::fx::FxHashMap; use rustc_hir::def::DefKind; use rustc_hir::intravisit::Visitor; use rustc_hir::{self as hir, intravisit, Closure, ExprKind, Item, ItemKind, Mutability, QPath}; -use rustc_lint::{CheckLintNameResult, LateContext, LateLintPass, LintContext, LintId}; +use rustc_lint::{unerased_lint_store, CheckLintNameResult, LateContext, LateLintPass, LintContext, LintId}; use rustc_middle::hir::nested_filter; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::symbol::Ident; use rustc_span::{sym, Loc, Span, Symbol}; use serde::ser::SerializeStruct; use serde::{Serialize, Serializer}; use std::collections::{BTreeSet, BinaryHeap}; -use std::fmt; use std::fmt::Write as _; use std::fs::{self, File}; use std::io::prelude::*; use std::path::{Path, PathBuf}; use std::process::Command; +use std::{env, fmt}; /// This is the json output file of the lint collector. const JSON_OUTPUT_FILE: &str = "../util/gh-pages/lints.json"; @@ -416,7 +415,7 @@ fn get_lint_output(lint_name: &str, example: &[&mut String], clippy_project_root let prefixed_name = format!("{CLIPPY_LINT_GROUP_PREFIX}{lint_name}"); - let mut cmd = Command::new("cargo"); + let mut cmd = Command::new(env::var("CARGO").unwrap_or("cargo".into())); cmd.current_dir(clippy_project_root) .env("CARGO_INCREMENTAL", "0") @@ -543,49 +542,45 @@ impl<'hir> LateLintPass<'hir> for MetadataCollector { fn check_item(&mut self, cx: &LateContext<'hir>, item: &'hir Item<'_>) { if let ItemKind::Static(ty, Mutability::Not, _) = item.kind { // Normal lint - if_chain! { + if is_lint_ref_type(cx, ty) // item validation - if is_lint_ref_type(cx, ty); // disallow check - let lint_name = sym_to_string(item.ident.name).to_ascii_lowercase(); + && let lint_name = sym_to_string(item.ident.name).to_ascii_lowercase() // metadata extraction - if let Some((group, level)) = get_lint_group_and_level_or_lint(cx, &lint_name, item); - if let Some(mut raw_docs) = extract_attr_docs_or_lint(cx, item); - then { - if let Some(configuration_section) = self.get_lint_configs(&lint_name) { - raw_docs.push_str(&configuration_section); - } - let version = get_lint_version(cx, item); - - self.lints.push(LintMetadata::new( - lint_name, - SerializableSpan::from_item(cx, item), - group, - level, - version, - raw_docs, - )); + && let Some((group, level)) = get_lint_group_and_level_or_lint(cx, &lint_name, item) + && let Some(mut raw_docs) = extract_attr_docs_or_lint(cx, item) + { + if let Some(configuration_section) = self.get_lint_configs(&lint_name) { + raw_docs.push_str(&configuration_section); } + let version = get_lint_version(cx, item); + + self.lints.push(LintMetadata::new( + lint_name, + SerializableSpan::from_item(cx, item), + group, + level, + version, + raw_docs, + )); } - if_chain! { - if is_deprecated_lint(cx, ty); + if is_deprecated_lint(cx, ty) // disallow check - let lint_name = sym_to_string(item.ident.name).to_ascii_lowercase(); + && let lint_name = sym_to_string(item.ident.name).to_ascii_lowercase() // Metadata the little we can get from a deprecated lint - if let Some(raw_docs) = extract_attr_docs_or_lint(cx, item); - then { - let version = get_lint_version(cx, item); - - self.lints.push(LintMetadata::new( - lint_name, - SerializableSpan::from_item(cx, item), - DEPRECATED_LINT_GROUP_STR.to_string(), - DEPRECATED_LINT_LEVEL, - version, - raw_docs, - )); - } + && let Some(raw_docs) = extract_attr_docs_or_lint(cx, item) + { + let version = get_lint_version(cx, item); + + self.lints.push(LintMetadata::new( + lint_name, + SerializableSpan::from_item(cx, item), + DEPRECATED_LINT_GROUP_STR.to_string(), + DEPRECATED_LINT_LEVEL, + version, + raw_docs, + )); } } } @@ -719,7 +714,7 @@ fn get_lint_group_and_level_or_lint( lint_name: &str, item: &Item<'_>, ) -> Option<(String, &'static str)> { - let result = cx.lint_store.check_lint_name( + let result = unerased_lint_store(cx.tcx.sess).check_lint_name( lint_name, Some(sym::clippy), &std::iter::once(Ident::with_dummy_span(sym::clippy)).collect(), @@ -751,7 +746,7 @@ fn get_lint_group_and_level_or_lint( } fn get_lint_group(cx: &LateContext<'_>, lint_id: LintId) -> Option<String> { - for (group_name, lints, _) in cx.lint_store.get_lint_groups() { + for (group_name, lints, _) in unerased_lint_store(cx.tcx.sess).get_lint_groups() { if IGNORED_LINT_GROUPS.contains(&group_name) { continue; } @@ -789,15 +784,13 @@ fn collect_renames(lints: &mut Vec<LintMetadata>) { loop { if let Some(lint_name) = names.pop() { for (k, v) in RENAMED_LINTS { - if_chain! { - if let Some(name) = v.strip_prefix(CLIPPY_LINT_GROUP_PREFIX); - if name == lint_name; - if let Some(past_name) = k.strip_prefix(CLIPPY_LINT_GROUP_PREFIX); - then { - lint.former_ids.insert(past_name.to_owned()); - writeln!(collected, "* `{past_name}`").unwrap(); - names.push(past_name.to_string()); - } + if let Some(name) = v.strip_prefix(CLIPPY_LINT_GROUP_PREFIX) + && name == lint_name + && let Some(past_name) = k.strip_prefix(CLIPPY_LINT_GROUP_PREFIX) + { + lint.former_ids.insert(past_name.to_owned()); + writeln!(collected, "* `{past_name}`").unwrap(); + names.push(past_name.to_string()); } } @@ -927,20 +920,17 @@ impl<'a, 'hir> intravisit::Visitor<'hir> for LintResolver<'a, 'hir> { } fn visit_expr(&mut self, expr: &'hir hir::Expr<'hir>) { - if_chain! { - if let ExprKind::Path(qpath) = &expr.kind; - if let QPath::Resolved(_, path) = qpath; - - let (expr_ty, _) = walk_ptrs_ty_depth(self.cx.typeck_results().expr_ty(expr)); - if match_type(self.cx, expr_ty, &paths::LINT); - then { - if let hir::def::Res::Def(DefKind::Static(..), _) = path.res { - let lint_name = last_path_segment(qpath).ident.name; - self.lints.push(sym_to_string(lint_name).to_ascii_lowercase()); - } else if let Some(local) = get_parent_local(self.cx, expr) { - if let Some(local_init) = local.init { - intravisit::walk_expr(self, local_init); - } + if let ExprKind::Path(qpath) = &expr.kind + && let QPath::Resolved(_, path) = qpath + && let (expr_ty, _) = walk_ptrs_ty_depth(self.cx.typeck_results().expr_ty(expr)) + && match_type(self.cx, expr_ty, &paths::LINT) + { + if let hir::def::Res::Def(DefKind::Static(..), _) = path.res { + let lint_name = last_path_segment(qpath).ident.name; + self.lints.push(sym_to_string(lint_name).to_ascii_lowercase()); + } else if let Some(local) = get_parent_local(self.cx, expr) { + if let Some(local_init) = local.init { + intravisit::walk_expr(self, local_init); } } } @@ -992,13 +982,11 @@ impl<'a, 'hir> intravisit::Visitor<'hir> for ApplicabilityResolver<'a, 'hir> { fn visit_expr(&mut self, expr: &'hir hir::Expr<'hir>) { let (expr_ty, _) = walk_ptrs_ty_depth(self.cx.typeck_results().expr_ty(expr)); - if_chain! { - if match_type(self.cx, expr_ty, &paths::APPLICABILITY); - if let Some(local) = get_parent_local(self.cx, expr); - if let Some(local_init) = local.init; - then { - intravisit::walk_expr(self, local_init); - } + if match_type(self.cx, expr_ty, &paths::APPLICABILITY) + && let Some(local) = get_parent_local(self.cx, expr) + && let Some(local_init) = local.init + { + intravisit::walk_expr(self, local_init); }; intravisit::walk_expr(self, expr); diff --git a/src/tools/clippy/clippy_lints/src/utils/internal_lints/msrv_attr_impl.rs b/src/tools/clippy/clippy_lints/src/utils/internal_lints/msrv_attr_impl.rs index 86b77a77f..6d5240db8 100644 --- a/src/tools/clippy/clippy_lints/src/utils/internal_lints/msrv_attr_impl.rs +++ b/src/tools/clippy/clippy_lints/src/utils/internal_lints/msrv_attr_impl.rs @@ -2,12 +2,11 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet; use clippy_utils::ty::match_type; use clippy_utils::{match_def_path, paths}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::ty::{self, EarlyBinder, GenericArgKind}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does @@ -22,40 +21,41 @@ declare_lint_pass!(MsrvAttrImpl => [MISSING_MSRV_ATTR_IMPL]); impl LateLintPass<'_> for MsrvAttrImpl { fn check_item(&mut self, cx: &LateContext<'_>, item: &hir::Item<'_>) { - if_chain! { - if let hir::ItemKind::Impl(hir::Impl { - of_trait: Some(_), - items, - .. - }) = &item.kind; - if let Some(trait_ref) = cx.tcx.impl_trait_ref(item.owner_id).map(EarlyBinder::instantiate_identity); - let is_late_pass = match_def_path(cx, trait_ref.def_id, &paths::LATE_LINT_PASS); - if is_late_pass || match_def_path(cx, trait_ref.def_id, &paths::EARLY_LINT_PASS); - if let ty::Adt(self_ty_def, _) = trait_ref.self_ty().kind(); - if self_ty_def.is_struct(); - if self_ty_def.all_fields().any(|f| { + if let hir::ItemKind::Impl(hir::Impl { + of_trait: Some(_), + items, + .. + }) = &item.kind + && let Some(trait_ref) = cx + .tcx + .impl_trait_ref(item.owner_id) + .map(EarlyBinder::instantiate_identity) + && let is_late_pass = match_def_path(cx, trait_ref.def_id, &paths::LATE_LINT_PASS) + && (is_late_pass || match_def_path(cx, trait_ref.def_id, &paths::EARLY_LINT_PASS)) + && let ty::Adt(self_ty_def, _) = trait_ref.self_ty().kind() + && self_ty_def.is_struct() + && self_ty_def.all_fields().any(|f| { cx.tcx .type_of(f.did) .instantiate_identity() .walk() .filter(|t| matches!(t.unpack(), GenericArgKind::Type(_))) .any(|t| match_type(cx, t.expect_ty(), &paths::MSRV)) - }); - if !items.iter().any(|item| item.ident.name == sym!(enter_lint_attrs)); - then { - let context = if is_late_pass { "LateContext" } else { "EarlyContext" }; - let lint_pass = if is_late_pass { "LateLintPass" } else { "EarlyLintPass" }; - let span = cx.sess().source_map().span_through_char(item.span, '{'); - span_lint_and_sugg( - cx, - MISSING_MSRV_ATTR_IMPL, - span, - &format!("`extract_msrv_attr!` macro missing from `{lint_pass}` implementation"), - &format!("add `extract_msrv_attr!({context})` to the `{lint_pass}` implementation"), - format!("{}\n extract_msrv_attr!({context});", snippet(cx, span, "..")), - Applicability::MachineApplicable, - ); - } + }) + && !items.iter().any(|item| item.ident.name == sym!(enter_lint_attrs)) + { + let context = if is_late_pass { "LateContext" } else { "EarlyContext" }; + let lint_pass = if is_late_pass { "LateLintPass" } else { "EarlyLintPass" }; + let span = cx.sess().source_map().span_through_char(item.span, '{'); + span_lint_and_sugg( + cx, + MISSING_MSRV_ATTR_IMPL, + span, + &format!("`extract_msrv_attr!` macro missing from `{lint_pass}` implementation"), + &format!("add `extract_msrv_attr!({context})` to the `{lint_pass}` implementation"), + format!("{}\n extract_msrv_attr!({context});", snippet(cx, span, "..")), + Applicability::MachineApplicable, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/utils/internal_lints/outer_expn_data_pass.rs b/src/tools/clippy/clippy_lints/src/utils/internal_lints/outer_expn_data_pass.rs index 2b13fad80..326e17214 100644 --- a/src/tools/clippy/clippy_lints/src/utils/internal_lints/outer_expn_data_pass.rs +++ b/src/tools/clippy/clippy_lints/src/utils/internal_lints/outer_expn_data_pass.rs @@ -1,11 +1,10 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::ty::match_type; use clippy_utils::{is_lint_allowed, method_calls, paths}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::symbol::Symbol; declare_clippy_lint! { @@ -40,23 +39,21 @@ impl<'tcx> LateLintPass<'tcx> for OuterExpnDataPass { let (method_names, arg_lists, spans) = method_calls(expr, 2); let method_names: Vec<&str> = method_names.iter().map(Symbol::as_str).collect(); - if_chain! { - if let ["expn_data", "outer_expn"] = method_names.as_slice(); - let (self_arg, args) = arg_lists[1]; - if args.is_empty(); - let self_ty = cx.typeck_results().expr_ty(self_arg).peel_refs(); - if match_type(cx, self_ty, &paths::SYNTAX_CONTEXT); - then { - span_lint_and_sugg( - cx, - OUTER_EXPN_EXPN_DATA, - spans[1].with_hi(expr.span.hi()), - "usage of `outer_expn().expn_data()`", - "try", - "outer_expn_data()".to_string(), - Applicability::MachineApplicable, - ); - } + if let ["expn_data", "outer_expn"] = method_names.as_slice() + && let (self_arg, args) = arg_lists[1] + && args.is_empty() + && let self_ty = cx.typeck_results().expr_ty(self_arg).peel_refs() + && match_type(cx, self_ty, &paths::SYNTAX_CONTEXT) + { + span_lint_and_sugg( + cx, + OUTER_EXPN_EXPN_DATA, + spans[1].with_hi(expr.span.hi()), + "usage of `outer_expn().expn_data()`", + "try", + "outer_expn_data()".to_string(), + Applicability::MachineApplicable, + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/utils/internal_lints/produce_ice.rs b/src/tools/clippy/clippy_lints/src/utils/internal_lints/produce_ice.rs index 5899b94e1..9169e2968 100644 --- a/src/tools/clippy/clippy_lints/src/utils/internal_lints/produce_ice.rs +++ b/src/tools/clippy/clippy_lints/src/utils/internal_lints/produce_ice.rs @@ -1,7 +1,7 @@ use rustc_ast::ast::NodeId; use rustc_ast::visit::FnKind; use rustc_lint::{EarlyContext, EarlyLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::Span; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/utils/internal_lints/unnecessary_def_path.rs b/src/tools/clippy/clippy_lints/src/utils/internal_lints/unnecessary_def_path.rs index 81be04659..6e449dc98 100644 --- a/src/tools/clippy/clippy_lints/src/utils/internal_lints/unnecessary_def_path.rs +++ b/src/tools/clippy/clippy_lints/src/utils/internal_lints/unnecessary_def_path.rs @@ -1,7 +1,6 @@ use clippy_utils::diagnostics::{span_lint_and_help, span_lint_and_then}; use clippy_utils::source::snippet_with_applicability; use clippy_utils::{def_path_def_ids, is_lint_allowed, match_any_def_paths, peel_hir_expr_refs}; -use if_chain::if_chain; use rustc_ast::ast::LitKind; use rustc_data_structures::fx::{FxHashSet, FxIndexSet}; use rustc_errors::Applicability; @@ -13,7 +12,7 @@ use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::mir::interpret::{Allocation, GlobalAlloc}; use rustc_middle::mir::ConstValue; use rustc_middle::ty::{self, Ty}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::symbol::Symbol; use rustc_span::Span; @@ -102,108 +101,106 @@ impl UnnecessaryDefPath { &["clippy_utils", "is_expr_path_def_path"], ]; - if_chain! { - if let [cx_arg, def_arg, args @ ..] = args; - if let ExprKind::Path(path) = &func.kind; - if let Some(id) = cx.qpath_res(path, func.hir_id).opt_def_id(); - if let Some(which_path) = match_any_def_paths(cx, id, PATHS); - let item_arg = if which_path == 4 { &args[1] } else { &args[0] }; + if let [cx_arg, def_arg, args @ ..] = args + && let ExprKind::Path(path) = &func.kind + && let Some(id) = cx.qpath_res(path, func.hir_id).opt_def_id() + && let Some(which_path) = match_any_def_paths(cx, id, PATHS) + && let item_arg = if which_path == 4 { &args[1] } else { &args[0] } // Extract the path to the matched type - if let Some(segments) = path_to_matched_type(cx, item_arg); - let segments: Vec<&str> = segments.iter().map(|sym| &**sym).collect(); - if let Some(def_id) = def_path_def_ids(cx, &segments[..]).next(); - then { - // Check if the target item is a diagnostic item or LangItem. - #[rustfmt::skip] - let (msg, item) = if let Some(item_name) - = cx.tcx.diagnostic_items(def_id.krate).id_to_name.get(&def_id) - { - ( - "use of a def path to a diagnostic item", - Item::DiagnosticItem(*item_name), - ) - } else if let Some(item_name) = get_lang_item_name(cx, def_id) { - ( - "use of a def path to a `LangItem`", - Item::LangItem(item_name), - ) - } else { - return; - }; + && let Some(segments) = path_to_matched_type(cx, item_arg) + && let segments = segments.iter().map(|sym| &**sym).collect::<Vec<_>>() + && let Some(def_id) = def_path_def_ids(cx, &segments[..]).next() + { + // Check if the target item is a diagnostic item or LangItem. + #[rustfmt::skip] + let (msg, item) = if let Some(item_name) + = cx.tcx.diagnostic_items(def_id.krate).id_to_name.get(&def_id) + { + ( + "use of a def path to a diagnostic item", + Item::DiagnosticItem(*item_name), + ) + } else if let Some(item_name) = get_lang_item_name(cx, def_id) { + ( + "use of a def path to a `LangItem`", + Item::LangItem(item_name), + ) + } else { + return; + }; - let has_ctor = match cx.tcx.def_kind(def_id) { - DefKind::Struct => { - let variant = cx.tcx.adt_def(def_id).non_enum_variant(); - variant.ctor.is_some() && variant.fields.iter().all(|f| f.vis.is_public()) - }, - DefKind::Variant => { - let variant = cx.tcx.adt_def(cx.tcx.parent(def_id)).variant_with_id(def_id); - variant.ctor.is_some() && variant.fields.iter().all(|f| f.vis.is_public()) - }, - _ => false, - }; + let has_ctor = match cx.tcx.def_kind(def_id) { + DefKind::Struct => { + let variant = cx.tcx.adt_def(def_id).non_enum_variant(); + variant.ctor.is_some() && variant.fields.iter().all(|f| f.vis.is_public()) + }, + DefKind::Variant => { + let variant = cx.tcx.adt_def(cx.tcx.parent(def_id)).variant_with_id(def_id); + variant.ctor.is_some() && variant.fields.iter().all(|f| f.vis.is_public()) + }, + _ => false, + }; - let mut app = Applicability::MachineApplicable; - let cx_snip = snippet_with_applicability(cx, cx_arg.span, "..", &mut app); - let def_snip = snippet_with_applicability(cx, def_arg.span, "..", &mut app); - let (sugg, with_note) = match (which_path, item) { - // match_def_path - (0, Item::DiagnosticItem(item)) => ( - format!("{cx_snip}.tcx.is_diagnostic_item(sym::{item}, {def_snip})"), - has_ctor, - ), - (0, Item::LangItem(item)) => ( - format!("{cx_snip}.tcx.lang_items().get(LangItem::{item}) == Some({def_snip})"), - has_ctor, - ), - // match_trait_method - (1, Item::DiagnosticItem(item)) => { - (format!("is_trait_method({cx_snip}, {def_snip}, sym::{item})"), false) - }, - // match_type - (2, Item::DiagnosticItem(item)) => ( - format!("is_type_diagnostic_item({cx_snip}, {def_snip}, sym::{item})"), - false, - ), - (2, Item::LangItem(item)) => ( - format!("is_type_lang_item({cx_snip}, {def_snip}, LangItem::{item})"), - false, - ), - // is_expr_path_def_path - (3, Item::DiagnosticItem(item)) if has_ctor => ( - format!("is_res_diag_ctor({cx_snip}, path_res({cx_snip}, {def_snip}), sym::{item})",), - false, - ), - (3, Item::LangItem(item)) if has_ctor => ( - format!("is_res_lang_ctor({cx_snip}, path_res({cx_snip}, {def_snip}), LangItem::{item})",), - false, - ), - (3, Item::DiagnosticItem(item)) => ( - format!("is_path_diagnostic_item({cx_snip}, {def_snip}, sym::{item})"), - false, - ), - (3, Item::LangItem(item)) => ( - format!( - "path_res({cx_snip}, {def_snip}).opt_def_id()\ - .map_or(false, |id| {cx_snip}.tcx.lang_items().get(LangItem::{item}) == Some(id))", - ), - false, + let mut app = Applicability::MachineApplicable; + let cx_snip = snippet_with_applicability(cx, cx_arg.span, "..", &mut app); + let def_snip = snippet_with_applicability(cx, def_arg.span, "..", &mut app); + let (sugg, with_note) = match (which_path, item) { + // match_def_path + (0, Item::DiagnosticItem(item)) => ( + format!("{cx_snip}.tcx.is_diagnostic_item(sym::{item}, {def_snip})"), + has_ctor, + ), + (0, Item::LangItem(item)) => ( + format!("{cx_snip}.tcx.lang_items().get(LangItem::{item}) == Some({def_snip})"), + has_ctor, + ), + // match_trait_method + (1, Item::DiagnosticItem(item)) => { + (format!("is_trait_method({cx_snip}, {def_snip}, sym::{item})"), false) + }, + // match_type + (2, Item::DiagnosticItem(item)) => ( + format!("is_type_diagnostic_item({cx_snip}, {def_snip}, sym::{item})"), + false, + ), + (2, Item::LangItem(item)) => ( + format!("is_type_lang_item({cx_snip}, {def_snip}, LangItem::{item})"), + false, + ), + // is_expr_path_def_path + (3, Item::DiagnosticItem(item)) if has_ctor => ( + format!("is_res_diag_ctor({cx_snip}, path_res({cx_snip}, {def_snip}), sym::{item})",), + false, + ), + (3, Item::LangItem(item)) if has_ctor => ( + format!("is_res_lang_ctor({cx_snip}, path_res({cx_snip}, {def_snip}), LangItem::{item})",), + false, + ), + (3, Item::DiagnosticItem(item)) => ( + format!("is_path_diagnostic_item({cx_snip}, {def_snip}, sym::{item})"), + false, + ), + (3, Item::LangItem(item)) => ( + format!( + "path_res({cx_snip}, {def_snip}).opt_def_id()\ + .map_or(false, |id| {cx_snip}.tcx.lang_items().get(LangItem::{item}) == Some(id))", ), - _ => return, - }; + false, + ), + _ => return, + }; - span_lint_and_then(cx, UNNECESSARY_DEF_PATH, span, msg, |diag| { - diag.span_suggestion(span, "try", sugg, app); - if with_note { - diag.help( - "if this `DefId` came from a constructor expression or pattern then the \ - parent `DefId` should be used instead", - ); - } - }); + span_lint_and_then(cx, UNNECESSARY_DEF_PATH, span, msg, |diag| { + diag.span_suggestion(span, "try", sugg, app); + if with_note { + diag.help( + "if this `DefId` came from a constructor expression or pattern then the \ + parent `DefId` should be used instead", + ); + } + }); - self.linted_def_ids.insert(def_id); - } + self.linted_def_ids.insert(def_id); } } @@ -221,7 +218,7 @@ fn path_to_matched_type(cx: &LateContext<'_>, expr: &hir::Expr<'_>) -> Option<Ve ExprKind::Path(ref qpath) => match cx.qpath_res(qpath, expr.hir_id) { Res::Local(hir_id) => { let parent_id = cx.tcx.hir().parent_id(hir_id); - if let Some(Node::Local(Local { init: Some(init), .. })) = cx.tcx.hir().find(parent_id) { + if let Node::Local(Local { init: Some(init), .. }) = cx.tcx.hir_node(parent_id) { path_to_matched_type(cx, init) } else { None @@ -249,7 +246,7 @@ fn path_to_matched_type(cx: &LateContext<'_>, expr: &hir::Expr<'_>) -> Option<Ve fn read_mir_alloc_def_path<'tcx>(cx: &LateContext<'tcx>, alloc: &'tcx Allocation, ty: Ty<'_>) -> Option<Vec<String>> { let (alloc, ty) = if let ty::Ref(_, ty, Mutability::Not) = *ty.kind() { let &alloc = alloc.provenance().ptrs().values().next()?; - if let GlobalAlloc::Memory(alloc) = cx.tcx.global_alloc(alloc) { + if let GlobalAlloc::Memory(alloc) = cx.tcx.global_alloc(alloc.alloc_id()) { (alloc.inner(), ty) } else { return None; @@ -267,7 +264,7 @@ fn read_mir_alloc_def_path<'tcx>(cx: &LateContext<'tcx>, alloc: &'tcx Allocation .ptrs() .values() .map(|&alloc| { - if let GlobalAlloc::Memory(alloc) = cx.tcx.global_alloc(alloc) { + if let GlobalAlloc::Memory(alloc) = cx.tcx.global_alloc(alloc.alloc_id()) { let alloc = alloc.inner(); str::from_utf8(alloc.inspect_with_uninit_and_ptr_outside_interpreter(0..alloc.len())) .ok() diff --git a/src/tools/clippy/clippy_lints/src/utils/internal_lints/unsorted_clippy_utils_paths.rs b/src/tools/clippy/clippy_lints/src/utils/internal_lints/unsorted_clippy_utils_paths.rs index fd51bca9e..a5c4bf474 100644 --- a/src/tools/clippy/clippy_lints/src/utils/internal_lints/unsorted_clippy_utils_paths.rs +++ b/src/tools/clippy/clippy_lints/src/utils/internal_lints/unsorted_clippy_utils_paths.rs @@ -1,7 +1,7 @@ use clippy_utils::diagnostics::span_lint; use rustc_ast::ast::{Crate, ItemKind, ModKind}; use rustc_lint::{EarlyContext, EarlyLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does diff --git a/src/tools/clippy/clippy_lints/src/vec.rs b/src/tools/clippy/clippy_lints/src/vec.rs index a9a3aaad3..5e13c73f0 100644 --- a/src/tools/clippy/clippy_lints/src/vec.rs +++ b/src/tools/clippy/clippy_lints/src/vec.rs @@ -1,26 +1,27 @@ +use std::collections::BTreeMap; use std::ops::ControlFlow; use clippy_config::msrvs::{self, Msrv}; use clippy_utils::consts::{constant, Constant}; -use clippy_utils::diagnostics::span_lint_and_sugg; +use clippy_utils::diagnostics::span_lint_hir_and_then; use clippy_utils::source::snippet_with_applicability; use clippy_utils::ty::is_copy; use clippy_utils::visitors::for_each_local_use_after_expr; use clippy_utils::{get_parent_expr, higher, is_trait_method}; -use if_chain::if_chain; use rustc_errors::Applicability; -use rustc_hir::{BorrowKind, Expr, ExprKind, Mutability, Node, PatKind}; +use rustc_hir::{BorrowKind, Expr, ExprKind, HirId, Mutability, Node, PatKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::layout::LayoutOf; use rustc_middle::ty::{self, Ty}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; -use rustc_span::{sym, Span}; +use rustc_session::impl_lint_pass; +use rustc_span::{sym, DesugaringKind, Span}; #[expect(clippy::module_name_repetitions)] #[derive(Clone)] pub struct UselessVec { pub too_large_for_stack: u64, pub msrv: Msrv, + pub span_to_lint_map: BTreeMap<Span, Option<(HirId, SuggestedType, String, Applicability)>>, } declare_clippy_lint! { @@ -58,7 +59,7 @@ fn adjusts_to_slice(cx: &LateContext<'_>, e: &Expr<'_>) -> bool { /// Checks if the given expression is a method call to a `Vec` method /// that also exists on slices. If this returns true, it means that /// this expression does not actually require a `Vec` and could just work with an array. -fn is_allowed_vec_method(cx: &LateContext<'_>, e: &Expr<'_>) -> bool { +pub fn is_allowed_vec_method(cx: &LateContext<'_>, e: &Expr<'_>) -> bool { const ALLOWED_METHOD_NAMES: &[&str] = &["len", "as_ptr", "is_empty"]; if let ExprKind::MethodCall(path, ..) = e.kind { @@ -70,11 +71,56 @@ fn is_allowed_vec_method(cx: &LateContext<'_>, e: &Expr<'_>) -> bool { impl<'tcx> LateLintPass<'tcx> for UselessVec { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) { - // search for `&vec![_]` or `vec![_]` expressions where the adjusted type is `&[_]` - if_chain! { - if adjusts_to_slice(cx, expr); - if let Some(vec_args) = higher::VecArgs::hir(cx, expr.peel_borrows()); - then { + if let Some(vec_args) = higher::VecArgs::hir(cx, expr.peel_borrows()) { + // search for `let foo = vec![_]` expressions where all uses of `foo` + // adjust to slices or call a method that exist on slices (e.g. len) + if let Node::Local(local) = cx.tcx.hir().get_parent(expr.hir_id) + // for now ignore locals with type annotations. + // this is to avoid compile errors when doing the suggestion here: let _: Vec<_> = vec![..]; + && local.ty.is_none() + && let PatKind::Binding(_, id, ..) = local.pat.kind + && is_copy(cx, vec_type(cx.typeck_results().expr_ty_adjusted(expr.peel_borrows()))) + { + let only_slice_uses = for_each_local_use_after_expr(cx, id, expr.hir_id, |expr| { + // allow indexing into a vec and some set of allowed method calls that exist on slices, too + if let Some(parent) = get_parent_expr(cx, expr) + && (adjusts_to_slice(cx, expr) + || matches!(parent.kind, ExprKind::Index(..)) + || is_allowed_vec_method(cx, parent)) + { + ControlFlow::Continue(()) + } else { + ControlFlow::Break(()) + } + }) + .is_continue(); + + let span = expr.span.ctxt().outer_expn_data().call_site; + if only_slice_uses { + self.check_vec_macro(cx, &vec_args, span, expr.hir_id, SuggestedType::Array); + } else { + self.span_to_lint_map.insert(span, None); + } + } + // if the local pattern has a specified type, do not lint. + else if let Some(_) = higher::VecArgs::hir(cx, expr) + && let Node::Local(local) = cx.tcx.hir().get_parent(expr.hir_id) + && local.ty.is_some() + { + let span = expr.span.ctxt().outer_expn_data().call_site; + self.span_to_lint_map.insert(span, None); + } + // search for `for _ in vec![...]` + else if let Some(parent) = get_parent_expr(cx, expr) + && parent.span.is_desugaring(DesugaringKind::ForLoop) + && self.msrv.meets(msrvs::ARRAY_INTO_ITERATOR) + { + // report the error around the `vec!` not inside `<std macros>:` + let span = expr.span.ctxt().outer_expn_data().call_site; + self.check_vec_macro(cx, &vec_args, span, expr.hir_id, SuggestedType::Array); + } + // search for `&vec![_]` or `vec![_]` expressions where the adjusted type is `&[_]` + else { let (suggest_slice, span) = if let ExprKind::AddrOf(BorrowKind::Ref, mutability, _) = expr.kind { // `expr` is `&vec![_]`, so suggest `&[_]` (or `&mut[_]` resp.) (SuggestedType::SliceRef(mutability), expr.span) @@ -84,53 +130,28 @@ impl<'tcx> LateLintPass<'tcx> for UselessVec { (SuggestedType::Array, expr.span.ctxt().outer_expn_data().call_site) }; - self.check_vec_macro(cx, &vec_args, span, suggest_slice); - } - } - - // search for `let foo = vec![_]` expressions where all uses of `foo` - // adjust to slices or call a method that exist on slices (e.g. len) - if let Some(vec_args) = higher::VecArgs::hir(cx, expr) - && let Node::Local(local) = cx.tcx.hir().get_parent(expr.hir_id) - // for now ignore locals with type annotations. - // this is to avoid compile errors when doing the suggestion here: let _: Vec<_> = vec![..]; - && local.ty.is_none() - && let PatKind::Binding(_, id, ..) = local.pat.kind - && is_copy(cx, vec_type(cx.typeck_results().expr_ty_adjusted(expr))) - { - let only_slice_uses = for_each_local_use_after_expr(cx, id, expr.hir_id, |expr| { - // allow indexing into a vec and some set of allowed method calls that exist on slices, too - if let Some(parent) = get_parent_expr(cx, expr) - && (adjusts_to_slice(cx, expr) - || matches!(parent.kind, ExprKind::Index(..)) - || is_allowed_vec_method(cx, parent)) - { - ControlFlow::Continue(()) + if adjusts_to_slice(cx, expr) { + self.check_vec_macro(cx, &vec_args, span, expr.hir_id, suggest_slice); } else { - ControlFlow::Break(()) + self.span_to_lint_map.insert(span, None); } - }) - .is_continue(); - - if only_slice_uses { - self.check_vec_macro( - cx, - &vec_args, - expr.span.ctxt().outer_expn_data().call_site, - SuggestedType::Array, - ); } } + } - // search for `for _ in vec![…]` - if_chain! { - if let Some(higher::ForLoop { arg, .. }) = higher::ForLoop::hir(expr); - if let Some(vec_args) = higher::VecArgs::hir(cx, arg); - if self.msrv.meets(msrvs::ARRAY_INTO_ITERATOR); - then { - // report the error around the `vec!` not inside `<std macros>:` - let span = arg.span.ctxt().outer_expn_data().call_site; - self.check_vec_macro(cx, &vec_args, span, SuggestedType::Array); + fn check_crate_post(&mut self, cx: &LateContext<'tcx>) { + for (span, lint_opt) in &self.span_to_lint_map { + if let Some((hir_id, suggest_slice, snippet, applicability)) = lint_opt { + let help_msg = format!( + "you can use {} directly", + match suggest_slice { + SuggestedType::SliceRef(_) => "a slice", + SuggestedType::Array => "an array", + } + ); + span_lint_hir_and_then(cx, USELESS_VEC, *hir_id, *span, "useless use of `vec!`", |diag| { + diag.span_suggestion(*span, help_msg, snippet, *applicability); + }); } } } @@ -139,7 +160,7 @@ impl<'tcx> LateLintPass<'tcx> for UselessVec { } #[derive(Copy, Clone)] -enum SuggestedType { +pub(crate) enum SuggestedType { /// Suggest using a slice `&[..]` / `&mut [..]` SliceRef(Mutability), /// Suggest using an array: `[..]` @@ -152,6 +173,7 @@ impl UselessVec { cx: &LateContext<'tcx>, vec_args: &higher::VecArgs<'tcx>, span: Span, + hir_id: HirId, suggest_slice: SuggestedType, ) { if span.from_expansion() { @@ -209,21 +231,9 @@ impl UselessVec { }, }; - span_lint_and_sugg( - cx, - USELESS_VEC, - span, - "useless use of `vec!`", - &format!( - "you can use {} directly", - match suggest_slice { - SuggestedType::SliceRef(_) => "a slice", - SuggestedType::Array => "an array", - } - ), - snippet, - applicability, - ); + self.span_to_lint_map + .entry(span) + .or_insert(Some((hir_id, suggest_slice, snippet, applicability))); } } diff --git a/src/tools/clippy/clippy_lints/src/vec_init_then_push.rs b/src/tools/clippy/clippy_lints/src/vec_init_then_push.rs index c8b9402f1..ac3b2bdaf 100644 --- a/src/tools/clippy/clippy_lints/src/vec_init_then_push.rs +++ b/src/tools/clippy/clippy_lints/src/vec_init_then_push.rs @@ -11,7 +11,7 @@ use rustc_hir::{ }; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::{Span, Symbol}; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/visibility.rs b/src/tools/clippy/clippy_lints/src/visibility.rs index 8abcc964b..83369c663 100644 --- a/src/tools/clippy/clippy_lints/src/visibility.rs +++ b/src/tools/clippy/clippy_lints/src/visibility.rs @@ -4,7 +4,7 @@ use rustc_ast::ast::{Item, VisibilityKind}; use rustc_errors::Applicability; use rustc_lint::{EarlyContext, EarlyLintPass, LintContext}; use rustc_middle::lint::in_external_macro; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::symbol::kw; use rustc_span::Span; diff --git a/src/tools/clippy/clippy_lints/src/wildcard_imports.rs b/src/tools/clippy/clippy_lints/src/wildcard_imports.rs index d88ede763..9b0dac6af 100644 --- a/src/tools/clippy/clippy_lints/src/wildcard_imports.rs +++ b/src/tools/clippy/clippy_lints/src/wildcard_imports.rs @@ -1,13 +1,12 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::is_test_module_or_function; use clippy_utils::source::{snippet, snippet_with_applicability}; -use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::def::{DefKind, Res}; use rustc_hir::{Item, ItemKind, PathSegment, UseKind}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::ty; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::symbol::kw; use rustc_span::{sym, BytePos}; @@ -127,70 +126,55 @@ impl LateLintPass<'_> for WildcardImports { if cx.tcx.visibility(item.owner_id.def_id) != ty::Visibility::Restricted(module.to_def_id()) { return; } - if_chain! { - if let ItemKind::Use(use_path, UseKind::Glob) = &item.kind; - if self.warn_on_all || !self.check_exceptions(item, use_path.segments); - let used_imports = cx.tcx.names_imported_by_glob_use(item.owner_id.def_id); - if !used_imports.is_empty(); // Already handled by `unused_imports` - if !used_imports.contains(&kw::Underscore); - then { - let mut applicability = Applicability::MachineApplicable; - let import_source_snippet = snippet_with_applicability(cx, use_path.span, "..", &mut applicability); - let (span, braced_glob) = if import_source_snippet.is_empty() { - // This is a `_::{_, *}` import - // In this case `use_path.span` is empty and ends directly in front of the `*`, - // so we need to extend it by one byte. - ( - use_path.span.with_hi(use_path.span.hi() + BytePos(1)), - true, - ) - } else { - // In this case, the `use_path.span` ends right before the `::*`, so we need to - // extend it up to the `*`. Since it is hard to find the `*` in weird - // formattings like `use _ :: *;`, we extend it up to, but not including the - // `;`. In nested imports, like `use _::{inner::*, _}` there is no `;` and we - // can just use the end of the item span - let mut span = use_path.span.with_hi(item.span.hi()); - if snippet(cx, span, "").ends_with(';') { - span = use_path.span.with_hi(item.span.hi() - BytePos(1)); - } - ( - span, false, - ) - }; + if let ItemKind::Use(use_path, UseKind::Glob) = &item.kind + && (self.warn_on_all || !self.check_exceptions(item, use_path.segments)) + && let used_imports = cx.tcx.names_imported_by_glob_use(item.owner_id.def_id) + && !used_imports.is_empty() // Already handled by `unused_imports` + && !used_imports.contains(&kw::Underscore) + { + let mut applicability = Applicability::MachineApplicable; + let import_source_snippet = snippet_with_applicability(cx, use_path.span, "..", &mut applicability); + let (span, braced_glob) = if import_source_snippet.is_empty() { + // This is a `_::{_, *}` import + // In this case `use_path.span` is empty and ends directly in front of the `*`, + // so we need to extend it by one byte. + (use_path.span.with_hi(use_path.span.hi() + BytePos(1)), true) + } else { + // In this case, the `use_path.span` ends right before the `::*`, so we need to + // extend it up to the `*`. Since it is hard to find the `*` in weird + // formattings like `use _ :: *;`, we extend it up to, but not including the + // `;`. In nested imports, like `use _::{inner::*, _}` there is no `;` and we + // can just use the end of the item span + let mut span = use_path.span.with_hi(item.span.hi()); + if snippet(cx, span, "").ends_with(';') { + span = use_path.span.with_hi(item.span.hi() - BytePos(1)); + } + (span, false) + }; - let mut imports = used_imports.items().map(ToString::to_string).into_sorted_stable_ord(); - let imports_string = if imports.len() == 1 { - imports.pop().unwrap() - } else if braced_glob { - imports.join(", ") - } else { - format!("{{{}}}", imports.join(", ")) - }; + let mut imports = used_imports.items().map(ToString::to_string).into_sorted_stable_ord(); + let imports_string = if imports.len() == 1 { + imports.pop().unwrap() + } else if braced_glob { + imports.join(", ") + } else { + format!("{{{}}}", imports.join(", ")) + }; - let sugg = if braced_glob { - imports_string - } else { - format!("{import_source_snippet}::{imports_string}") - }; + let sugg = if braced_glob { + imports_string + } else { + format!("{import_source_snippet}::{imports_string}") + }; - // Glob imports always have a single resolution. - let (lint, message) = if let Res::Def(DefKind::Enum, _) = use_path.res[0] { - (ENUM_GLOB_USE, "usage of wildcard import for enum variants") - } else { - (WILDCARD_IMPORTS, "usage of wildcard import") - }; + // Glob imports always have a single resolution. + let (lint, message) = if let Res::Def(DefKind::Enum, _) = use_path.res[0] { + (ENUM_GLOB_USE, "usage of wildcard import for enum variants") + } else { + (WILDCARD_IMPORTS, "usage of wildcard import") + }; - span_lint_and_sugg( - cx, - lint, - span, - message, - "try", - sugg, - applicability, - ); - } + span_lint_and_sugg(cx, lint, span, message, "try", sugg, applicability); } } diff --git a/src/tools/clippy/clippy_lints/src/write.rs b/src/tools/clippy/clippy_lints/src/write.rs index b6f942a90..be16d2e5c 100644 --- a/src/tools/clippy/clippy_lints/src/write.rs +++ b/src/tools/clippy/clippy_lints/src/write.rs @@ -10,7 +10,7 @@ use rustc_ast::{ use rustc_errors::Applicability; use rustc_hir::{Expr, Impl, Item, ItemKind}; use rustc_lint::{LateContext, LateLintPass, LintContext}; -use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_session::impl_lint_pass; use rustc_span::{sym, BytePos, Span}; declare_clippy_lint! { diff --git a/src/tools/clippy/clippy_lints/src/zero_div_zero.rs b/src/tools/clippy/clippy_lints/src/zero_div_zero.rs index f2f0699ef..d3623d6fd 100644 --- a/src/tools/clippy/clippy_lints/src/zero_div_zero.rs +++ b/src/tools/clippy/clippy_lints/src/zero_div_zero.rs @@ -1,9 +1,8 @@ use clippy_utils::consts::{constant_simple, Constant}; use clippy_utils::diagnostics::span_lint_and_help; -use if_chain::if_chain; use rustc_hir::{BinOpKind, Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; declare_clippy_lint! { /// ### What it does @@ -32,35 +31,30 @@ declare_lint_pass!(ZeroDiv => [ZERO_DIVIDED_BY_ZERO]); impl<'tcx> LateLintPass<'tcx> for ZeroDiv { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) { // check for instances of 0.0/0.0 - if_chain! { - if let ExprKind::Binary(ref op, left, right) = expr.kind; - if op.node == BinOpKind::Div; + if let ExprKind::Binary(ref op, left, right) = expr.kind + && op.node == BinOpKind::Div // TODO - constant_simple does not fold many operations involving floats. // That's probably fine for this lint - it's pretty unlikely that someone would // do something like 0.0/(2.0 - 2.0), but it would be nice to warn on that case too. - if let Some(lhs_value) = constant_simple(cx, cx.typeck_results(), left); - if let Some(rhs_value) = constant_simple(cx, cx.typeck_results(), right); - if Constant::F32(0.0) == lhs_value || Constant::F64(0.0) == lhs_value; - if Constant::F32(0.0) == rhs_value || Constant::F64(0.0) == rhs_value; - then { - // since we're about to suggest a use of f32::NAN or f64::NAN, - // match the precision of the literals that are given. - let float_type = match (lhs_value, rhs_value) { - (Constant::F64(_), _) - | (_, Constant::F64(_)) => "f64", - _ => "f32" - }; - span_lint_and_help( - cx, - ZERO_DIVIDED_BY_ZERO, - expr.span, - "constant division of `0.0` with `0.0` will always result in NaN", - None, - &format!( - "consider using `{float_type}::NAN` if you would like a constant representing NaN", - ), - ); - } + && let Some(lhs_value) = constant_simple(cx, cx.typeck_results(), left) + && let Some(rhs_value) = constant_simple(cx, cx.typeck_results(), right) + && (Constant::F32(0.0) == lhs_value || Constant::F64(0.0) == lhs_value) + && (Constant::F32(0.0) == rhs_value || Constant::F64(0.0) == rhs_value) + { + // since we're about to suggest a use of f32::NAN or f64::NAN, + // match the precision of the literals that are given. + let float_type = match (lhs_value, rhs_value) { + (Constant::F64(_), _) | (_, Constant::F64(_)) => "f64", + _ => "f32", + }; + span_lint_and_help( + cx, + ZERO_DIVIDED_BY_ZERO, + expr.span, + "constant division of `0.0` with `0.0` will always result in NaN", + None, + &format!("consider using `{float_type}::NAN` if you would like a constant representing NaN",), + ); } } } diff --git a/src/tools/clippy/clippy_lints/src/zero_sized_map_values.rs b/src/tools/clippy/clippy_lints/src/zero_sized_map_values.rs index fee100fe1..b36c4ef91 100644 --- a/src/tools/clippy/clippy_lints/src/zero_sized_map_values.rs +++ b/src/tools/clippy/clippy_lints/src/zero_sized_map_values.rs @@ -1,12 +1,11 @@ use clippy_utils::diagnostics::span_lint_and_help; use clippy_utils::ty::{is_normalizable, is_type_diagnostic_item}; -use if_chain::if_chain; use rustc_hir::{self as hir, HirId, ItemKind, Node}; use rustc_hir_analysis::hir_ty_to_ty; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::layout::LayoutOf as _; use rustc_middle::ty::{Adt, Ty, TypeVisitableExt}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_session::declare_lint_pass; use rustc_span::sym; declare_clippy_lint! { @@ -46,23 +45,28 @@ declare_lint_pass!(ZeroSizedMapValues => [ZERO_SIZED_MAP_VALUES]); impl LateLintPass<'_> for ZeroSizedMapValues { fn check_ty(&mut self, cx: &LateContext<'_>, hir_ty: &hir::Ty<'_>) { - if_chain! { - if !hir_ty.span.from_expansion(); - if !in_trait_impl(cx, hir_ty.hir_id); - let ty = ty_from_hir_ty(cx, hir_ty); - if is_type_diagnostic_item(cx, ty, sym::HashMap) || is_type_diagnostic_item(cx, ty, sym::BTreeMap); - if let Adt(_, args) = ty.kind(); - let ty = args.type_at(1); + if !hir_ty.span.from_expansion() + && !in_trait_impl(cx, hir_ty.hir_id) + && let ty = ty_from_hir_ty(cx, hir_ty) + && (is_type_diagnostic_item(cx, ty, sym::HashMap) || is_type_diagnostic_item(cx, ty, sym::BTreeMap)) + && let Adt(_, args) = ty.kind() + && let ty = args.type_at(1) // Fixes https://github.com/rust-lang/rust-clippy/issues/7447 because of // https://github.com/rust-lang/rust/blob/master/compiler/rustc_middle/src/ty/sty.rs#L968 - if !ty.has_escaping_bound_vars(); + && !ty.has_escaping_bound_vars() // Do this to prevent `layout_of` crashing, being unable to fully normalize `ty`. - if is_normalizable(cx, cx.param_env, ty); - if let Ok(layout) = cx.layout_of(ty); - if layout.is_zst(); - then { - span_lint_and_help(cx, ZERO_SIZED_MAP_VALUES, hir_ty.span, "map with zero-sized value type", None, "consider using a set instead"); - } + && is_normalizable(cx, cx.param_env, ty) + && let Ok(layout) = cx.layout_of(ty) + && layout.is_zst() + { + span_lint_and_help( + cx, + ZERO_SIZED_MAP_VALUES, + hir_ty.span, + "map with zero-sized value type", + None, + "consider using a set instead", + ); } } } @@ -70,7 +74,7 @@ impl LateLintPass<'_> for ZeroSizedMapValues { fn in_trait_impl(cx: &LateContext<'_>, hir_id: HirId) -> bool { let parent_id = cx.tcx.hir().get_parent_item(hir_id); let second_parent_id = cx.tcx.hir().get_parent_item(parent_id.into()).def_id; - if let Some(Node::Item(item)) = cx.tcx.hir().find_by_def_id(second_parent_id) { + if let Some(Node::Item(item)) = cx.tcx.opt_hir_node_by_def_id(second_parent_id) { if let ItemKind::Impl(hir::Impl { of_trait: Some(_), .. }) = item.kind { return true; } diff --git a/src/tools/clippy/clippy_utils/Cargo.toml b/src/tools/clippy/clippy_utils/Cargo.toml index c9b01a68f..5d23326ce 100644 --- a/src/tools/clippy/clippy_utils/Cargo.toml +++ b/src/tools/clippy/clippy_utils/Cargo.toml @@ -1,14 +1,13 @@ [package] name = "clippy_utils" -version = "0.1.75" +version = "0.1.76" edition = "2021" publish = false [dependencies] clippy_config = { path = "../clippy_config" } arrayvec = { version = "0.7", default-features = false } -if_chain = "1.0" -itertools = "0.10.1" +itertools = "0.11" rustc-semver = "1.1" [features] diff --git a/src/tools/clippy/clippy_utils/src/ast_utils.rs b/src/tools/clippy/clippy_utils/src/ast_utils.rs index a2c61e07b..c271e4986 100644 --- a/src/tools/clippy/clippy_utils/src/ast_utils.rs +++ b/src/tools/clippy/clippy_utils/src/ast_utils.rs @@ -188,7 +188,7 @@ pub fn eq_expr(l: &Expr, r: &Expr) -> bool { Closure(box ast::Closure { binder: lb, capture_clause: lc, - asyncness: la, + coroutine_kind: la, movability: lm, fn_decl: lf, body: le, @@ -197,7 +197,7 @@ pub fn eq_expr(l: &Expr, r: &Expr) -> bool { Closure(box ast::Closure { binder: rb, capture_clause: rc, - asyncness: ra, + coroutine_kind: ra, movability: rm, fn_decl: rf, body: re, @@ -206,7 +206,7 @@ pub fn eq_expr(l: &Expr, r: &Expr) -> bool { ) => { eq_closure_binder(lb, rb) && lc == rc - && la.is_async() == ra.is_async() + && la.map_or(false, CoroutineKind::is_async) == ra.map_or(false, CoroutineKind::is_async) && lm == rm && eq_fn_decl(lf, rf) && eq_expr(le, re) @@ -236,7 +236,7 @@ pub fn eq_field(l: &ExprField, r: &ExprField) -> bool { pub fn eq_arm(l: &Arm, r: &Arm) -> bool { l.is_placeholder == r.is_placeholder && eq_pat(&l.pat, &r.pat) - && eq_expr(&l.body, &r.body) + && eq_expr_opt(&l.body, &r.body) && eq_expr_opt(&l.guard, &r.guard) && over(&l.attrs, &r.attrs, eq_attr) } @@ -546,7 +546,9 @@ pub fn eq_variant_data(l: &VariantData, r: &VariantData) -> bool { use VariantData::*; match (l, r) { (Unit(_), Unit(_)) => true, - (Struct(l, _), Struct(r, _)) | (Tuple(l, _), Tuple(r, _)) => over(l, r, eq_struct_field), + (Struct { fields: l, .. }, Struct { fields: r, .. }) | (Tuple(l, _), Tuple(r, _)) => { + over(l, r, eq_struct_field) + }, _ => false, } } @@ -563,9 +565,22 @@ pub fn eq_fn_sig(l: &FnSig, r: &FnSig) -> bool { eq_fn_decl(&l.decl, &r.decl) && eq_fn_header(&l.header, &r.header) } +fn eq_opt_coroutine_kind(l: Option<CoroutineKind>, r: Option<CoroutineKind>) -> bool { + matches!( + (l, r), + (Some(CoroutineKind::Async { .. }), Some(CoroutineKind::Async { .. })) + | (Some(CoroutineKind::Gen { .. }), Some(CoroutineKind::Gen { .. })) + | ( + Some(CoroutineKind::AsyncGen { .. }), + Some(CoroutineKind::AsyncGen { .. }) + ) + | (None, None) + ) +} + pub fn eq_fn_header(l: &FnHeader, r: &FnHeader) -> bool { matches!(l.unsafety, Unsafe::No) == matches!(r.unsafety, Unsafe::No) - && l.asyncness.is_async() == r.asyncness.is_async() + && eq_opt_coroutine_kind(l.coroutine_kind, r.coroutine_kind) && matches!(l.constness, Const::No) == matches!(r.constness, Const::No) && eq_ext(&l.ext, &r.ext) } diff --git a/src/tools/clippy/clippy_utils/src/check_proc_macro.rs b/src/tools/clippy/clippy_utils/src/check_proc_macro.rs index 2f619a306..d751aeaf9 100644 --- a/src/tools/clippy/clippy_utils/src/check_proc_macro.rs +++ b/src/tools/clippy/clippy_utils/src/check_proc_macro.rs @@ -200,7 +200,7 @@ fn item_search_pat(item: &Item<'_>) -> (Pat, Pat) { ItemKind::ForeignMod { .. } => (Pat::Str("extern"), Pat::Str("}")), ItemKind::TyAlias(..) | ItemKind::OpaqueTy(_) => (Pat::Str("type"), Pat::Str(";")), ItemKind::Enum(..) => (Pat::Str("enum"), Pat::Str("}")), - ItemKind::Struct(VariantData::Struct(..), _) => (Pat::Str("struct"), Pat::Str("}")), + ItemKind::Struct(VariantData::Struct { .. }, _) => (Pat::Str("struct"), Pat::Str("}")), ItemKind::Struct(..) => (Pat::Str("struct"), Pat::Str(";")), ItemKind::Union(..) => (Pat::Str("union"), Pat::Str("}")), ItemKind::Trait(_, Unsafety::Unsafe, ..) @@ -255,7 +255,7 @@ fn field_def_search_pat(def: &FieldDef<'_>) -> (Pat, Pat) { fn variant_search_pat(v: &Variant<'_>) -> (Pat, Pat) { match v.data { - VariantData::Struct(..) => (Pat::Sym(v.ident.name), Pat::Str("}")), + VariantData::Struct { .. } => (Pat::Sym(v.ident.name), Pat::Str("}")), VariantData::Tuple(..) => (Pat::Sym(v.ident.name), Pat::Str("")), VariantData::Unit(..) => (Pat::Sym(v.ident.name), Pat::Sym(v.ident.name)), } @@ -267,7 +267,7 @@ fn fn_kind_pat(tcx: TyCtxt<'_>, kind: &FnKind<'_>, body: &Body<'_>, hir_id: HirI FnKind::Method(.., sig) => (fn_header_search_pat(sig.header), Pat::Str("")), FnKind::Closure => return (Pat::Str(""), expr_search_pat(tcx, body.value).1), }; - let start_pat = match tcx.hir().get(hir_id) { + let start_pat = match tcx.hir_node(hir_id) { Node::Item(Item { vis_span, .. }) | Node::ImplItem(ImplItem { vis_span, .. }) => { if vis_span.is_empty() { start_pat diff --git a/src/tools/clippy/clippy_utils/src/consts.rs b/src/tools/clippy/clippy_utils/src/consts.rs index b581a60de..727f93c83 100644 --- a/src/tools/clippy/clippy_utils/src/consts.rs +++ b/src/tools/clippy/clippy_utils/src/consts.rs @@ -2,7 +2,7 @@ use crate::source::{get_source_text, walk_span_to_context}; use crate::{clip, is_direct_expn_of, sext, unsext}; -use if_chain::if_chain; + use rustc_ast::ast::{self, LitFloatType, LitKind}; use rustc_data_structures::sync::Lrc; use rustc_hir::def::{DefKind, Res}; @@ -10,7 +10,7 @@ use rustc_hir::{BinOp, BinOpKind, Block, ConstBlock, Expr, ExprKind, HirId, Item use rustc_lexer::tokenize; use rustc_lint::LateContext; use rustc_middle::mir::interpret::{alloc_range, Scalar}; -use rustc_middle::ty::{self, EarlyBinder, FloatTy, GenericArgsRef, List, ScalarInt, Ty, TyCtxt}; +use rustc_middle::ty::{self, EarlyBinder, FloatTy, GenericArgsRef, IntTy, List, ScalarInt, Ty, TyCtxt, UintTy}; use rustc_middle::{bug, mir, span_bug}; use rustc_span::symbol::{Ident, Symbol}; use rustc_span::SyntaxContext; @@ -51,6 +51,63 @@ pub enum Constant<'tcx> { Err, } +trait IntTypeBounds: Sized { + type Output: PartialOrd; + + fn min_max(self) -> Option<(Self::Output, Self::Output)>; + fn bits(self) -> Self::Output; + fn ensure_fits(self, val: Self::Output) -> Option<Self::Output> { + let (min, max) = self.min_max()?; + (min <= val && val <= max).then_some(val) + } +} +impl IntTypeBounds for UintTy { + type Output = u128; + fn min_max(self) -> Option<(Self::Output, Self::Output)> { + Some(match self { + UintTy::U8 => (u8::MIN.into(), u8::MAX.into()), + UintTy::U16 => (u16::MIN.into(), u16::MAX.into()), + UintTy::U32 => (u32::MIN.into(), u32::MAX.into()), + UintTy::U64 => (u64::MIN.into(), u64::MAX.into()), + UintTy::U128 => (u128::MIN, u128::MAX), + UintTy::Usize => (usize::MIN.try_into().ok()?, usize::MAX.try_into().ok()?), + }) + } + fn bits(self) -> Self::Output { + match self { + UintTy::U8 => 8, + UintTy::U16 => 16, + UintTy::U32 => 32, + UintTy::U64 => 64, + UintTy::U128 => 128, + UintTy::Usize => usize::BITS.into(), + } + } +} +impl IntTypeBounds for IntTy { + type Output = i128; + fn min_max(self) -> Option<(Self::Output, Self::Output)> { + Some(match self { + IntTy::I8 => (i8::MIN.into(), i8::MAX.into()), + IntTy::I16 => (i16::MIN.into(), i16::MAX.into()), + IntTy::I32 => (i32::MIN.into(), i32::MAX.into()), + IntTy::I64 => (i64::MIN.into(), i64::MAX.into()), + IntTy::I128 => (i128::MIN, i128::MAX), + IntTy::Isize => (isize::MIN.try_into().ok()?, isize::MAX.try_into().ok()?), + }) + } + fn bits(self) -> Self::Output { + match self { + IntTy::I8 => 8, + IntTy::I16 => 16, + IntTy::I32 => 32, + IntTy::I64 => 64, + IntTy::I128 => 128, + IntTy::Isize => isize::BITS.into(), + } + } +} + impl<'tcx> PartialEq for Constant<'tcx> { fn eq(&self, other: &Self) -> bool { match (self, other) { @@ -372,27 +429,25 @@ impl<'a, 'tcx> ConstEvalLateContext<'a, 'tcx> { ExprKind::Binary(op, left, right) => self.binop(op, left, right), ExprKind::Call(callee, args) => { // We only handle a few const functions for now. - if_chain! { - if args.is_empty(); - if let ExprKind::Path(qpath) = &callee.kind; - let res = self.typeck_results.qpath_res(qpath, callee.hir_id); - if let Some(def_id) = res.opt_def_id(); - let def_path = self.lcx.get_def_path(def_id); - let def_path: Vec<&str> = def_path.iter().take(4).map(Symbol::as_str).collect(); - if let ["core", "num", int_impl, "max_value"] = *def_path; - then { - let value = match int_impl { - "<impl i8>" => i8::MAX as u128, - "<impl i16>" => i16::MAX as u128, - "<impl i32>" => i32::MAX as u128, - "<impl i64>" => i64::MAX as u128, - "<impl i128>" => i128::MAX as u128, - _ => return None, - }; - Some(Constant::Int(value)) - } else { - None - } + if args.is_empty() + && let ExprKind::Path(qpath) = &callee.kind + && let res = self.typeck_results.qpath_res(qpath, callee.hir_id) + && let Some(def_id) = res.opt_def_id() + && let def_path = self.lcx.get_def_path(def_id) + && let def_path = def_path.iter().take(4).map(Symbol::as_str).collect::<Vec<_>>() + && let ["core", "num", int_impl, "max_value"] = *def_path + { + let value = match int_impl { + "<impl i8>" => i8::MAX as u128, + "<impl i16>" => i16::MAX as u128, + "<impl i32>" => i32::MAX as u128, + "<impl i64>" => i64::MAX as u128, + "<impl i128>" => i128::MAX as u128, + _ => return None, + }; + Some(Constant::Int(value)) + } else { + None } }, ExprKind::Index(arr, index, _) => self.index(arr, index), @@ -435,8 +490,15 @@ impl<'a, 'tcx> ConstEvalLateContext<'a, 'tcx> { match *o { Int(value) => { let ty::Int(ity) = *ty.kind() else { return None }; + let (min, _) = ity.min_max()?; // sign extend let value = sext(self.lcx.tcx, value, ity); + + // Applying unary - to the most negative value of any signed integer type panics. + if value == min { + return None; + } + let value = value.checked_neg()?; // clear unused bits Some(Int(unsext(self.lcx.tcx, value, ity))) @@ -469,7 +531,7 @@ impl<'a, 'tcx> ConstEvalLateContext<'a, 'tcx> { kind: ExprKind::Lit(_), span, .. - }) = self.lcx.tcx.hir().get(body_id.hir_id) + }) = self.lcx.tcx.hir_node(body_id.hir_id) && is_direct_expn_of(*span, "cfg").is_some() { return None; @@ -572,17 +634,33 @@ impl<'a, 'tcx> ConstEvalLateContext<'a, 'tcx> { match (l, r) { (Constant::Int(l), Some(Constant::Int(r))) => match *self.typeck_results.expr_ty_opt(left)?.kind() { ty::Int(ity) => { + let (ty_min_value, _) = ity.min_max()?; + let bits = ity.bits(); let l = sext(self.lcx.tcx, l, ity); let r = sext(self.lcx.tcx, r, ity); + + // Using / or %, where the left-hand argument is the smallest integer of a signed integer type and + // the right-hand argument is -1 always panics, even with overflow-checks disabled + if let BinOpKind::Div | BinOpKind::Rem = op.node + && l == ty_min_value + && r == -1 + { + return None; + } + let zext = |n: i128| Constant::Int(unsext(self.lcx.tcx, n, ity)); match op.node { - BinOpKind::Add => l.checked_add(r).map(zext), - BinOpKind::Sub => l.checked_sub(r).map(zext), - BinOpKind::Mul => l.checked_mul(r).map(zext), + // When +, * or binary - create a value greater than the maximum value, or less than + // the minimum value that can be stored, it panics. + BinOpKind::Add => l.checked_add(r).and_then(|n| ity.ensure_fits(n)).map(zext), + BinOpKind::Sub => l.checked_sub(r).and_then(|n| ity.ensure_fits(n)).map(zext), + BinOpKind::Mul => l.checked_mul(r).and_then(|n| ity.ensure_fits(n)).map(zext), BinOpKind::Div if r != 0 => l.checked_div(r).map(zext), BinOpKind::Rem if r != 0 => l.checked_rem(r).map(zext), - BinOpKind::Shr => l.checked_shr(r.try_into().ok()?).map(zext), - BinOpKind::Shl => l.checked_shl(r.try_into().ok()?).map(zext), + // Using << or >> where the right-hand argument is greater than or equal to the number of bits + // in the type of the left-hand argument, or is negative panics. + BinOpKind::Shr if r < bits && !r.is_negative() => l.checked_shr(r.try_into().ok()?).map(zext), + BinOpKind::Shl if r < bits && !r.is_negative() => l.checked_shl(r.try_into().ok()?).map(zext), BinOpKind::BitXor => Some(zext(l ^ r)), BinOpKind::BitOr => Some(zext(l | r)), BinOpKind::BitAnd => Some(zext(l & r)), @@ -595,24 +673,28 @@ impl<'a, 'tcx> ConstEvalLateContext<'a, 'tcx> { _ => None, } }, - ty::Uint(_) => match op.node { - BinOpKind::Add => l.checked_add(r).map(Constant::Int), - BinOpKind::Sub => l.checked_sub(r).map(Constant::Int), - BinOpKind::Mul => l.checked_mul(r).map(Constant::Int), - BinOpKind::Div => l.checked_div(r).map(Constant::Int), - BinOpKind::Rem => l.checked_rem(r).map(Constant::Int), - BinOpKind::Shr => l.checked_shr(r.try_into().ok()?).map(Constant::Int), - BinOpKind::Shl => l.checked_shl(r.try_into().ok()?).map(Constant::Int), - BinOpKind::BitXor => Some(Constant::Int(l ^ r)), - BinOpKind::BitOr => Some(Constant::Int(l | r)), - BinOpKind::BitAnd => Some(Constant::Int(l & r)), - BinOpKind::Eq => Some(Constant::Bool(l == r)), - BinOpKind::Ne => Some(Constant::Bool(l != r)), - BinOpKind::Lt => Some(Constant::Bool(l < r)), - BinOpKind::Le => Some(Constant::Bool(l <= r)), - BinOpKind::Ge => Some(Constant::Bool(l >= r)), - BinOpKind::Gt => Some(Constant::Bool(l > r)), - _ => None, + ty::Uint(ity) => { + let bits = ity.bits(); + + match op.node { + BinOpKind::Add => l.checked_add(r).and_then(|n| ity.ensure_fits(n)).map(Constant::Int), + BinOpKind::Sub => l.checked_sub(r).and_then(|n| ity.ensure_fits(n)).map(Constant::Int), + BinOpKind::Mul => l.checked_mul(r).and_then(|n| ity.ensure_fits(n)).map(Constant::Int), + BinOpKind::Div => l.checked_div(r).map(Constant::Int), + BinOpKind::Rem => l.checked_rem(r).map(Constant::Int), + BinOpKind::Shr if r < bits => l.checked_shr(r.try_into().ok()?).map(Constant::Int), + BinOpKind::Shl if r < bits => l.checked_shl(r.try_into().ok()?).map(Constant::Int), + BinOpKind::BitXor => Some(Constant::Int(l ^ r)), + BinOpKind::BitOr => Some(Constant::Int(l | r)), + BinOpKind::BitAnd => Some(Constant::Int(l & r)), + BinOpKind::Eq => Some(Constant::Bool(l == r)), + BinOpKind::Ne => Some(Constant::Bool(l != r)), + BinOpKind::Lt => Some(Constant::Bool(l < r)), + BinOpKind::Le => Some(Constant::Bool(l <= r)), + BinOpKind::Ge => Some(Constant::Bool(l >= r)), + BinOpKind::Gt => Some(Constant::Bool(l > r)), + _ => None, + } }, _ => None, }, diff --git a/src/tools/clippy/clippy_utils/src/diagnostics.rs b/src/tools/clippy/clippy_utils/src/diagnostics.rs index 45c7e3a6e..756296153 100644 --- a/src/tools/clippy/clippy_utils/src/diagnostics.rs +++ b/src/tools/clippy/clippy_utils/src/diagnostics.rs @@ -46,9 +46,9 @@ fn docs_link(diag: &mut Diagnostic, lint: &'static Lint) { /// | ^^^^^^^^^^^^^^^^^^^^^^^ /// ``` pub fn span_lint<T: LintContext>(cx: &T, lint: &'static Lint, sp: impl Into<MultiSpan>, msg: &str) { + #[expect(clippy::disallowed_methods)] cx.struct_span_lint(lint, sp, msg.to_string(), |diag| { docs_link(diag, lint); - diag }); } @@ -80,6 +80,7 @@ pub fn span_lint_and_help<T: LintContext>( help_span: Option<Span>, help: &str, ) { + #[expect(clippy::disallowed_methods)] cx.struct_span_lint(lint, span, msg.to_string(), |diag| { let help = help.to_string(); if let Some(help_span) = help_span { @@ -88,7 +89,6 @@ pub fn span_lint_and_help<T: LintContext>( diag.help(help.to_string()); } docs_link(diag, lint); - diag }); } @@ -123,6 +123,7 @@ pub fn span_lint_and_note<T: LintContext>( note_span: Option<Span>, note: &str, ) { + #[expect(clippy::disallowed_methods)] cx.struct_span_lint(lint, span, msg.to_string(), |diag| { let note = note.to_string(); if let Some(note_span) = note_span { @@ -131,7 +132,6 @@ pub fn span_lint_and_note<T: LintContext>( diag.note(note); } docs_link(diag, lint); - diag }); } @@ -145,17 +145,17 @@ where S: Into<MultiSpan>, F: FnOnce(&mut Diagnostic), { + #[expect(clippy::disallowed_methods)] cx.struct_span_lint(lint, sp, msg.to_string(), |diag| { f(diag); docs_link(diag, lint); - diag }); } pub fn span_lint_hir(cx: &LateContext<'_>, lint: &'static Lint, hir_id: HirId, sp: Span, msg: &str) { + #[expect(clippy::disallowed_methods)] cx.tcx.struct_span_lint_hir(lint, hir_id, sp, msg.to_string(), |diag| { docs_link(diag, lint); - diag }); } @@ -167,10 +167,10 @@ pub fn span_lint_hir_and_then( msg: &str, f: impl FnOnce(&mut Diagnostic), ) { + #[expect(clippy::disallowed_methods)] cx.tcx.struct_span_lint_hir(lint, hir_id, sp, msg.to_string(), |diag| { f(diag); docs_link(diag, lint); - diag }); } diff --git a/src/tools/clippy/clippy_utils/src/eager_or_lazy.rs b/src/tools/clippy/clippy_utils/src/eager_or_lazy.rs index 0bcefba75..4e71c6483 100644 --- a/src/tools/clippy/clippy_utils/src/eager_or_lazy.rs +++ b/src/tools/clippy/clippy_utils/src/eager_or_lazy.rs @@ -9,12 +9,13 @@ //! - or-fun-call //! - option-if-let-else +use crate::consts::{constant, FullInt}; use crate::ty::{all_predicates_of, is_copy}; use crate::visitors::is_const_evaluatable; use rustc_hir::def::{DefKind, Res}; use rustc_hir::def_id::DefId; use rustc_hir::intravisit::{walk_expr, Visitor}; -use rustc_hir::{Block, Expr, ExprKind, QPath, UnOp}; +use rustc_hir::{BinOpKind, Block, Expr, ExprKind, QPath, UnOp}; use rustc_lint::LateContext; use rustc_middle::ty; use rustc_middle::ty::adjustment::Adjust; @@ -193,6 +194,12 @@ fn expr_eagerness<'tcx>(cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) -> EagernessS self.eagerness = Lazy; } }, + + // `-i32::MIN` panics with overflow checks + ExprKind::Unary(UnOp::Neg, right) if constant(self.cx, self.cx.typeck_results(), right).is_none() => { + self.eagerness |= NoChange; + }, + // Custom `Deref` impl might have side effects ExprKind::Unary(UnOp::Deref, e) if self.cx.typeck_results().expr_ty(e).builtin_deref(true).is_none() => @@ -207,6 +214,49 @@ fn expr_eagerness<'tcx>(cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) -> EagernessS self.cx.typeck_results().expr_ty(e).kind(), ty::Bool | ty::Int(_) | ty::Uint(_), ) => {}, + + // `>>` and `<<` panic when the right-hand side is greater than or equal to the number of bits in the + // type of the left-hand side, or is negative. + // We intentionally only check if the right-hand isn't a constant, because even if the suggestion would + // overflow with constants, the compiler emits an error for it and the programmer will have to fix it. + // Thus, we would realistically only delay the lint. + ExprKind::Binary(op, _, right) + if matches!(op.node, BinOpKind::Shl | BinOpKind::Shr) + && constant(self.cx, self.cx.typeck_results(), right).is_none() => + { + self.eagerness |= NoChange; + }, + + ExprKind::Binary(op, left, right) + if matches!(op.node, BinOpKind::Div | BinOpKind::Rem) + && let right_ty = self.cx.typeck_results().expr_ty(right) + && let left = constant(self.cx, self.cx.typeck_results(), left) + && let right = constant(self.cx, self.cx.typeck_results(), right) + .and_then(|c| c.int_value(self.cx, right_ty)) + && matches!( + (left, right), + // `1 / x`: x might be zero + (_, None) + // `x / -1`: x might be T::MIN + | (None, Some(FullInt::S(-1))) + ) => + { + self.eagerness |= NoChange; + }, + + // Similar to `>>` and `<<`, we only want to avoid linting entirely if either side is unknown and the + // compiler can't emit an error for an overflowing expression. + // Suggesting eagerness for `true.then(|| i32::MAX + 1)` is okay because the compiler will emit an + // error and it's good to have the eagerness warning up front when the user fixes the logic error. + ExprKind::Binary(op, left, right) + if matches!(op.node, BinOpKind::Add | BinOpKind::Sub | BinOpKind::Mul) + && !self.cx.typeck_results().expr_ty(e).is_floating_point() + && (constant(self.cx, self.cx.typeck_results(), left).is_none() + || constant(self.cx, self.cx.typeck_results(), right).is_none()) => + { + self.eagerness |= NoChange; + }, + ExprKind::Binary(_, lhs, rhs) if self.cx.typeck_results().expr_ty(lhs).is_primitive() && self.cx.typeck_results().expr_ty(rhs).is_primitive() => {}, diff --git a/src/tools/clippy/clippy_utils/src/higher.rs b/src/tools/clippy/clippy_utils/src/higher.rs index edea4b366..3135a0336 100644 --- a/src/tools/clippy/clippy_utils/src/higher.rs +++ b/src/tools/clippy/clippy_utils/src/higher.rs @@ -5,7 +5,7 @@ use crate::consts::{constant_simple, Constant}; use crate::ty::is_type_diagnostic_item; use crate::{is_expn_of, match_def_path, paths}; -use if_chain::if_chain; + use rustc_ast::ast; use rustc_hir as hir; use rustc_hir::{Arm, Block, Expr, ExprKind, HirId, LoopSource, MatchSource, Node, Pat, QPath}; @@ -30,24 +30,22 @@ pub struct ForLoop<'tcx> { impl<'tcx> ForLoop<'tcx> { /// Parses a desugared `for` loop pub fn hir(expr: &Expr<'tcx>) -> Option<Self> { - if_chain! { - if let hir::ExprKind::DropTemps(e) = expr.kind; - if let hir::ExprKind::Match(iterexpr, [arm], hir::MatchSource::ForLoopDesugar) = e.kind; - if let hir::ExprKind::Call(_, [arg]) = iterexpr.kind; - if let hir::ExprKind::Loop(block, ..) = arm.body.kind; - if let [stmt] = block.stmts; - if let hir::StmtKind::Expr(e) = stmt.kind; - if let hir::ExprKind::Match(_, [_, some_arm], _) = e.kind; - if let hir::PatKind::Struct(_, [field], _) = some_arm.pat.kind; - then { - return Some(Self { - pat: field.pat, - arg, - body: some_arm.body, - loop_id: arm.body.hir_id, - span: expr.span.ctxt().outer_expn_data().call_site, - }); - } + if let hir::ExprKind::DropTemps(e) = expr.kind + && let hir::ExprKind::Match(iterexpr, [arm], hir::MatchSource::ForLoopDesugar) = e.kind + && let hir::ExprKind::Call(_, [arg]) = iterexpr.kind + && let hir::ExprKind::Loop(block, ..) = arm.body.kind + && let [stmt] = block.stmts + && let hir::StmtKind::Expr(e) = stmt.kind + && let hir::ExprKind::Match(_, [_, some_arm], _) = e.kind + && let hir::PatKind::Struct(_, [field], _) = some_arm.pat.kind + { + return Some(Self { + pat: field.pat, + arg, + body: some_arm.body, + loop_id: arm.body.hir_id, + span: expr.span.ctxt().outer_expn_data().call_site, + }); } None } @@ -277,29 +275,28 @@ impl<'a> VecArgs<'a> { /// Returns the arguments of the `vec!` macro if this expression was expanded /// from `vec!`. pub fn hir(cx: &LateContext<'_>, expr: &'a hir::Expr<'_>) -> Option<VecArgs<'a>> { - if_chain! { - if let hir::ExprKind::Call(fun, args) = expr.kind; - if let hir::ExprKind::Path(ref qpath) = fun.kind; - if is_expn_of(fun.span, "vec").is_some(); - if let Some(fun_def_id) = cx.qpath_res(qpath, fun.hir_id).opt_def_id(); - then { - return if match_def_path(cx, fun_def_id, &paths::VEC_FROM_ELEM) && args.len() == 2 { - // `vec![elem; size]` case - Some(VecArgs::Repeat(&args[0], &args[1])) - } else if match_def_path(cx, fun_def_id, &paths::SLICE_INTO_VEC) && args.len() == 1 { - // `vec![a, b, c]` case - if let hir::ExprKind::Call(_, [arg]) = &args[0].kind - && let hir::ExprKind::Array(args) = arg.kind { - Some(VecArgs::Vec(args)) - } else { - None - } - } else if match_def_path(cx, fun_def_id, &paths::VEC_NEW) && args.is_empty() { - Some(VecArgs::Vec(&[])) + if let hir::ExprKind::Call(fun, args) = expr.kind + && let hir::ExprKind::Path(ref qpath) = fun.kind + && is_expn_of(fun.span, "vec").is_some() + && let Some(fun_def_id) = cx.qpath_res(qpath, fun.hir_id).opt_def_id() + { + return if match_def_path(cx, fun_def_id, &paths::VEC_FROM_ELEM) && args.len() == 2 { + // `vec![elem; size]` case + Some(VecArgs::Repeat(&args[0], &args[1])) + } else if match_def_path(cx, fun_def_id, &paths::SLICE_INTO_VEC) && args.len() == 1 { + // `vec![a, b, c]` case + if let hir::ExprKind::Call(_, [arg]) = &args[0].kind + && let hir::ExprKind::Array(args) = arg.kind + { + Some(VecArgs::Vec(args)) } else { None - }; - } + } + } else if match_def_path(cx, fun_def_id, &paths::VEC_NEW) && args.is_empty() { + Some(VecArgs::Vec(&[])) + } else { + None + }; } None diff --git a/src/tools/clippy/clippy_utils/src/hir_utils.rs b/src/tools/clippy/clippy_utils/src/hir_utils.rs index 2a8b2ebd5..e610ed930 100644 --- a/src/tools/clippy/clippy_utils/src/hir_utils.rs +++ b/src/tools/clippy/clippy_utils/src/hir_utils.rs @@ -247,7 +247,7 @@ impl HirEqInterExpr<'_, '_, '_> { res } - #[expect(clippy::similar_names)] + #[expect(clippy::similar_names, clippy::too_many_lines)] pub fn eq_expr(&mut self, left: &Expr<'_>, right: &Expr<'_>) -> bool { if !self.check_ctxt(left.span.ctxt(), right.span.ctxt()) { return false; @@ -271,9 +271,7 @@ impl HirEqInterExpr<'_, '_, '_> { (&ExprKind::AddrOf(lb, l_mut, le), &ExprKind::AddrOf(rb, r_mut, re)) => { lb == rb && l_mut == r_mut && self.eq_expr(le, re) }, - (&ExprKind::Continue(li), &ExprKind::Continue(ri)) => { - both(&li.label, &ri.label, |l, r| l.ident.name == r.ident.name) - }, + (&ExprKind::Array(l), &ExprKind::Array(r)) => self.eq_exprs(l, r), (&ExprKind::Assign(ll, lr, _), &ExprKind::Assign(rl, rr, _)) => { self.inner.allow_side_effects && self.eq_expr(ll, rl) && self.eq_expr(lr, rr) }, @@ -294,9 +292,15 @@ impl HirEqInterExpr<'_, '_, '_> { (&ExprKind::Call(l_fun, l_args), &ExprKind::Call(r_fun, r_args)) => { self.inner.allow_side_effects && self.eq_expr(l_fun, r_fun) && self.eq_exprs(l_args, r_args) }, - (&ExprKind::Cast(lx, lt), &ExprKind::Cast(rx, rt)) | (&ExprKind::Type(lx, lt), &ExprKind::Type(rx, rt)) => { + (&ExprKind::Cast(lx, lt), &ExprKind::Cast(rx, rt)) => { self.eq_expr(lx, rx) && self.eq_ty(lt, rt) }, + (&ExprKind::Closure(_l), &ExprKind::Closure(_r)) => false, + (&ExprKind::ConstBlock(lb), &ExprKind::ConstBlock(rb)) => self.eq_body(lb.body, rb.body), + (&ExprKind::Continue(li), &ExprKind::Continue(ri)) => { + both(&li.label, &ri.label, |l, r| l.ident.name == r.ident.name) + }, + (&ExprKind::DropTemps(le), &ExprKind::DropTemps(re)) => self.eq_expr(le, re), (&ExprKind::Field(l_f_exp, ref l_f_ident), &ExprKind::Field(r_f_exp, ref r_f_ident)) => { l_f_ident.name == r_f_ident.name && self.eq_expr(l_f_exp, r_f_exp) }, @@ -329,24 +333,70 @@ impl HirEqInterExpr<'_, '_, '_> { && self.eq_expr(l_receiver, r_receiver) && self.eq_exprs(l_args, r_args) }, + (&ExprKind::OffsetOf(l_container, l_fields), &ExprKind::OffsetOf(r_container, r_fields)) => { + self.eq_ty(l_container, r_container) && over(l_fields, r_fields, |l, r| l.name == r.name) + }, + (ExprKind::Path(l), ExprKind::Path(r)) => self.eq_qpath(l, r), (&ExprKind::Repeat(le, ll), &ExprKind::Repeat(re, rl)) => { self.eq_expr(le, re) && self.eq_array_length(ll, rl) }, (ExprKind::Ret(l), ExprKind::Ret(r)) => both(l, r, |l, r| self.eq_expr(l, r)), - (ExprKind::Path(l), ExprKind::Path(r)) => self.eq_qpath(l, r), (&ExprKind::Struct(l_path, lf, ref lo), &ExprKind::Struct(r_path, rf, ref ro)) => { self.eq_qpath(l_path, r_path) && both(lo, ro, |l, r| self.eq_expr(l, r)) && over(lf, rf, |l, r| self.eq_expr_field(l, r)) }, (&ExprKind::Tup(l_tup), &ExprKind::Tup(r_tup)) => self.eq_exprs(l_tup, r_tup), + (&ExprKind::Type(le, lt), &ExprKind::Type(re, rt)) => self.eq_expr(le, re) && self.eq_ty(lt, rt), (&ExprKind::Unary(l_op, le), &ExprKind::Unary(r_op, re)) => l_op == r_op && self.eq_expr(le, re), - (&ExprKind::Array(l), &ExprKind::Array(r)) => self.eq_exprs(l, r), - (&ExprKind::DropTemps(le), &ExprKind::DropTemps(re)) => self.eq_expr(le, re), - (&ExprKind::OffsetOf(l_container, l_fields), &ExprKind::OffsetOf(r_container, r_fields)) => { - self.eq_ty(l_container, r_container) && over(l_fields, r_fields, |l, r| l.name == r.name) - }, - _ => false, + (&ExprKind::Yield(le, _), &ExprKind::Yield(re, _)) => return self.eq_expr(le, re), + ( + // Else branches for branches above, grouped as per `match_same_arms`. + | &ExprKind::AddrOf(..) + | &ExprKind::Array(..) + | &ExprKind::Assign(..) + | &ExprKind::AssignOp(..) + | &ExprKind::Binary(..) + | &ExprKind::Become(..) + | &ExprKind::Block(..) + | &ExprKind::Break(..) + | &ExprKind::Call(..) + | &ExprKind::Cast(..) + | &ExprKind::ConstBlock(..) + | &ExprKind::Continue(..) + | &ExprKind::DropTemps(..) + | &ExprKind::Field(..) + | &ExprKind::Index(..) + | &ExprKind::If(..) + | &ExprKind::Let(..) + | &ExprKind::Lit(..) + | &ExprKind::Loop(..) + | &ExprKind::Match(..) + | &ExprKind::MethodCall(..) + | &ExprKind::OffsetOf(..) + | &ExprKind::Path(..) + | &ExprKind::Repeat(..) + | &ExprKind::Ret(..) + | &ExprKind::Struct(..) + | &ExprKind::Tup(..) + | &ExprKind::Type(..) + | &ExprKind::Unary(..) + | &ExprKind::Yield(..) + + // --- Special cases that do not have a positive branch. + + // `Err` represents an invalid expression, so let's never assume that + // an invalid expressions is equal to anything. + | &ExprKind::Err(..) + + // For the time being, we always consider that two closures are unequal. + // This behavior may change in the future. + | &ExprKind::Closure(..) + // For the time being, we always consider that two instances of InlineAsm are different. + // This behavior may change in the future. + | &ExprKind::InlineAsm(_) + , _ + ) => false, }; (is_eq && (!self.should_ignore(left) || !self.should_ignore(right))) || self.inner.expr_fallback.as_mut().map_or(false, |f| f(left, right)) @@ -684,6 +734,9 @@ impl<'a, 'tcx> SpanlessHash<'a, 'tcx> { self.hash_name(i.ident.name); } }, + ExprKind::Array(v) => { + self.hash_exprs(v); + }, ExprKind::Assign(l, r, _) => { self.hash_expr(l); self.hash_expr(r); @@ -693,6 +746,9 @@ impl<'a, 'tcx> SpanlessHash<'a, 'tcx> { self.hash_expr(l); self.hash_expr(r); }, + ExprKind::Become(f) => { + self.hash_expr(f); + }, ExprKind::Block(b, _) => { self.hash_block(b); }, @@ -709,9 +765,6 @@ impl<'a, 'tcx> SpanlessHash<'a, 'tcx> { self.hash_expr(j); } }, - ExprKind::DropTemps(e) | ExprKind::Yield(e, _) => { - self.hash_expr(e); - }, ExprKind::Call(fun, args) => { self.hash_expr(fun); self.hash_exprs(args); @@ -727,6 +780,12 @@ impl<'a, 'tcx> SpanlessHash<'a, 'tcx> { // closures inherit TypeckResults self.hash_expr(self.cx.tcx.hir().body(body).value); }, + ExprKind::ConstBlock(ref l_id) => { + self.hash_body(l_id.body); + }, + ExprKind::DropTemps(e) | ExprKind::Yield(e, _) => { + self.hash_expr(e); + }, ExprKind::Field(e, ref f) => { self.hash_expr(e); self.hash_name(f.name); @@ -788,12 +847,6 @@ impl<'a, 'tcx> SpanlessHash<'a, 'tcx> { } } }, - ExprKind::OffsetOf(container, fields) => { - self.hash_ty(container); - for field in fields { - self.hash_name(field.name); - } - }, ExprKind::Let(Let { pat, init, ty, .. }) => { self.hash_expr(init); if let Some(ty) = ty { @@ -801,7 +854,6 @@ impl<'a, 'tcx> SpanlessHash<'a, 'tcx> { } self.hash_pat(pat); }, - ExprKind::Err(_) => {}, ExprKind::Lit(l) => { l.node.hash(&mut self.s); }, @@ -836,8 +888,14 @@ impl<'a, 'tcx> SpanlessHash<'a, 'tcx> { self.hash_expr(receiver); self.hash_exprs(args); }, - ExprKind::ConstBlock(ref l_id) => { - self.hash_body(l_id.body); + ExprKind::OffsetOf(container, fields) => { + self.hash_ty(container); + for field in fields { + self.hash_name(field.name); + } + }, + ExprKind::Path(ref qpath) => { + self.hash_qpath(qpath); }, ExprKind::Repeat(e, len) => { self.hash_expr(e); @@ -848,12 +906,6 @@ impl<'a, 'tcx> SpanlessHash<'a, 'tcx> { self.hash_expr(e); } }, - ExprKind::Become(f) => { - self.hash_expr(f); - }, - ExprKind::Path(ref qpath) => { - self.hash_qpath(qpath); - }, ExprKind::Struct(path, fields, ref expr) => { self.hash_qpath(path); @@ -869,13 +921,11 @@ impl<'a, 'tcx> SpanlessHash<'a, 'tcx> { ExprKind::Tup(tup) => { self.hash_exprs(tup); }, - ExprKind::Array(v) => { - self.hash_exprs(v); - }, ExprKind::Unary(lop, le) => { std::mem::discriminant(&lop).hash(&mut self.s); self.hash_expr(le); }, + ExprKind::Err(_) => {}, } } @@ -967,7 +1017,7 @@ impl<'a, 'tcx> SpanlessHash<'a, 'tcx> { } e.hash(&mut self.s); }, - PatKind::Wild => {}, + PatKind::Never | PatKind::Wild => {}, } } diff --git a/src/tools/clippy/clippy_utils/src/lib.rs b/src/tools/clippy/clippy_utils/src/lib.rs index 1181dfc0e..70a3c6f82 100644 --- a/src/tools/clippy/clippy_utils/src/lib.rs +++ b/src/tools/clippy/clippy_utils/src/lib.rs @@ -71,12 +71,12 @@ pub use self::hir_utils::{ both, count_eq, eq_expr_value, hash_expr, hash_stmt, is_bool, over, HirEqInterExpr, SpanlessEq, SpanlessHash, }; +use core::mem; use core::ops::ControlFlow; use std::collections::hash_map::Entry; use std::hash::BuildHasherDefault; use std::sync::{Mutex, MutexGuard, OnceLock}; -use if_chain::if_chain; use itertools::Itertools; use rustc_ast::ast::{self, LitKind, RangeLimits}; use rustc_data_structures::fx::FxHashMap; @@ -176,14 +176,12 @@ pub fn expr_or_init<'a, 'b, 'tcx: 'b>(cx: &LateContext<'tcx>, mut expr: &'a Expr /// canonical binding `HirId`. pub fn find_binding_init<'tcx>(cx: &LateContext<'tcx>, hir_id: HirId) -> Option<&'tcx Expr<'tcx>> { let hir = cx.tcx.hir(); - if_chain! { - if let Some(Node::Pat(pat)) = hir.find(hir_id); - if matches!(pat.kind, PatKind::Binding(BindingAnnotation::NONE, ..)); - let parent = hir.parent_id(hir_id); - if let Some(Node::Local(local)) = hir.find(parent); - then { - return local.init; - } + if let Some(Node::Pat(pat)) = cx.tcx.opt_hir_node(hir_id) + && matches!(pat.kind, PatKind::Binding(BindingAnnotation::NONE, ..)) + && let parent = hir.parent_id(hir_id) + && let Some(Node::Local(local)) = cx.tcx.opt_hir_node(parent) + { + return local.init; } None } @@ -565,7 +563,7 @@ fn local_item_children_by_name(tcx: TyCtxt<'_>, local_id: LocalDefId, name: Symb let hir = tcx.hir(); let root_mod; - let item_kind = match hir.find_by_def_id(local_id) { + let item_kind = match tcx.opt_hir_node_by_def_id(local_id) { Some(Node::Crate(r#mod)) => { root_mod = ItemKind::Mod(r#mod); &root_mod @@ -711,15 +709,13 @@ pub fn get_trait_def_id(cx: &LateContext<'_>, path: &[&str]) -> Option<DefId> { /// ``` pub fn trait_ref_of_method<'tcx>(cx: &LateContext<'tcx>, def_id: LocalDefId) -> Option<&'tcx TraitRef<'tcx>> { // Get the implemented trait for the current function - let hir_id = cx.tcx.hir().local_def_id_to_hir_id(def_id); + let hir_id = cx.tcx.local_def_id_to_hir_id(def_id); let parent_impl = cx.tcx.hir().get_parent_item(hir_id); - if_chain! { - if parent_impl != hir::CRATE_OWNER_ID; - if let hir::Node::Item(item) = cx.tcx.hir().get_by_def_id(parent_impl.def_id); - if let hir::ItemKind::Impl(impl_) = &item.kind; - then { - return impl_.of_trait.as_ref(); - } + if parent_impl != hir::CRATE_OWNER_ID + && let hir::Node::Item(item) = cx.tcx.hir_node_by_def_id(parent_impl.def_id) + && let hir::ItemKind::Impl(impl_) = &item.kind + { + return impl_.of_trait.as_ref(); } None } @@ -823,12 +819,14 @@ fn is_default_equivalent_ctor(cx: &LateContext<'_>, def_id: DefId, path: &QPath< /// Returns true if the expr is equal to `Default::default` when evaluated. pub fn is_default_equivalent_call(cx: &LateContext<'_>, repl_func: &Expr<'_>) -> bool { - if_chain! { - if let hir::ExprKind::Path(ref repl_func_qpath) = repl_func.kind; - if let Some(repl_def_id) = cx.qpath_res(repl_func_qpath, repl_func.hir_id).opt_def_id(); - if is_diag_trait_item(cx, repl_def_id, sym::Default) - || is_default_equivalent_ctor(cx, repl_def_id, repl_func_qpath); - then { true } else { false } + if let hir::ExprKind::Path(ref repl_func_qpath) = repl_func.kind + && let Some(repl_def_id) = cx.qpath_res(repl_func_qpath, repl_func.hir_id).opt_def_id() + && (is_diag_trait_item(cx, repl_def_id, sym::Default) + || is_default_equivalent_ctor(cx, repl_def_id, repl_func_qpath)) + { + true + } else { + false } } @@ -843,14 +841,14 @@ pub fn is_default_equivalent(cx: &LateContext<'_>, e: &Expr<'_>) -> bool { _ => false, }, ExprKind::Tup(items) | ExprKind::Array(items) => items.iter().all(|x| is_default_equivalent(cx, x)), - ExprKind::Repeat(x, ArrayLen::Body(len)) => if_chain! { - if let ExprKind::Lit(const_lit) = cx.tcx.hir().body(len.body).value.kind; - if let LitKind::Int(v, _) = const_lit.node; - if v <= 32 && is_default_equivalent(cx, x); - then { + ExprKind::Repeat(x, ArrayLen::Body(len)) => { + if let ExprKind::Lit(const_lit) = cx.tcx.hir().body(len.body).value.kind + && let LitKind::Int(v, _) = const_lit.node + && v <= 32 + && is_default_equivalent(cx, x) + { true - } - else { + } else { false } }, @@ -1244,7 +1242,7 @@ pub fn is_in_panic_handler(cx: &LateContext<'_>, e: &Expr<'_>) -> bool { /// Gets the name of the item the expression is in, if available. pub fn get_item_name(cx: &LateContext<'_>, expr: &Expr<'_>) -> Option<Symbol> { let parent_id = cx.tcx.hir().get_parent_item(expr.hir_id).def_id; - match cx.tcx.hir().find_by_def_id(parent_id) { + match cx.tcx.opt_hir_node_by_def_id(parent_id) { Some( Node::Item(Item { ident, .. }) | Node::TraitItem(TraitItem { ident, .. }) @@ -1321,7 +1319,7 @@ pub fn get_enclosing_block<'tcx>(cx: &LateContext<'tcx>, hir_id: HirId) -> Optio let map = &cx.tcx.hir(); let enclosing_node = map .get_enclosing_scope(hir_id) - .and_then(|enclosing_id| map.find(enclosing_id)); + .and_then(|enclosing_id| cx.tcx.opt_hir_node(enclosing_id)); enclosing_node.and_then(|node| match node { Node::Block(block) => Some(block), Node::Item(&Item { @@ -1489,6 +1487,43 @@ pub fn is_else_clause(tcx: TyCtxt<'_>, expr: &Expr<'_>) -> bool { } } +/// Checks if the given expression is a part of `let else` +/// returns `true` for both the `init` and the `else` part +pub fn is_inside_let_else(tcx: TyCtxt<'_>, expr: &Expr<'_>) -> bool { + let mut child_id = expr.hir_id; + for (parent_id, node) in tcx.hir().parent_iter(child_id) { + if let Node::Local(Local { + init: Some(init), + els: Some(els), + .. + }) = node + && (init.hir_id == child_id || els.hir_id == child_id) + { + return true; + } + + child_id = parent_id; + } + + false +} + +/// Checks if the given expression is the else clause of a `let else` expression +pub fn is_else_clause_in_let_else(tcx: TyCtxt<'_>, expr: &Expr<'_>) -> bool { + let mut child_id = expr.hir_id; + for (parent_id, node) in tcx.hir().parent_iter(child_id) { + if let Node::Local(Local { els: Some(els), .. }) = node + && els.hir_id == child_id + { + return true; + } + + child_id = parent_id; + } + + false +} + /// Checks whether the given `Expr` is a range equivalent to a `RangeFull`. /// For the lower bound, this means that: /// - either there is none @@ -1632,13 +1667,13 @@ pub fn is_direct_expn_of(span: Span, name: &str) -> Option<Span> { /// Convenience function to get the return type of a function. pub fn return_ty<'tcx>(cx: &LateContext<'tcx>, fn_def_id: hir::OwnerId) -> Ty<'tcx> { let ret_ty = cx.tcx.fn_sig(fn_def_id).instantiate_identity().output(); - cx.tcx.erase_late_bound_regions(ret_ty) + cx.tcx.instantiate_bound_regions_with_erased(ret_ty) } /// Convenience function to get the nth argument type of a function. pub fn nth_arg<'tcx>(cx: &LateContext<'tcx>, fn_def_id: hir::OwnerId, nth: usize) -> Ty<'tcx> { let arg = cx.tcx.fn_sig(fn_def_id).instantiate_identity().input(nth); - cx.tcx.erase_late_bound_regions(arg) + cx.tcx.instantiate_bound_regions_with_erased(arg) } /// Checks if an expression is constructing a tuple-like enum variant or struct @@ -1671,7 +1706,7 @@ pub fn is_refutable(cx: &LateContext<'_>, pat: &Pat<'_>) -> bool { } match pat.kind { - PatKind::Wild => false, + PatKind::Wild | PatKind::Never => false, // If `!` typechecked then the type is empty, so not refutable. PatKind::Binding(_, _, _, pat) => pat.map_or(false, |pat| is_refutable(cx, pat)), PatKind::Box(pat) | PatKind::Ref(pat, _) => is_refutable(cx, pat), PatKind::Lit(..) | PatKind::Range(..) => true, @@ -1736,15 +1771,13 @@ pub fn iter_input_pats<'tcx>(decl: &FnDecl<'_>, body: &'tcx Body<'_>) -> impl It /// operator or the `try` macro. pub fn is_try<'tcx>(cx: &LateContext<'_>, expr: &'tcx Expr<'tcx>) -> Option<&'tcx Expr<'tcx>> { fn is_ok(cx: &LateContext<'_>, arm: &Arm<'_>) -> bool { - if_chain! { - if let PatKind::TupleStruct(ref path, pat, ddpos) = arm.pat.kind; - if ddpos.as_opt_usize().is_none(); - if is_res_lang_ctor(cx, cx.qpath_res(path, arm.pat.hir_id), ResultOk); - if let PatKind::Binding(_, hir_id, _, None) = pat[0].kind; - if path_to_local_id(arm.body, hir_id); - then { - return true; - } + if let PatKind::TupleStruct(ref path, pat, ddpos) = arm.pat.kind + && ddpos.as_opt_usize().is_none() + && is_res_lang_ctor(cx, cx.qpath_res(path, arm.pat.hir_id), ResultOk) + && let PatKind::Binding(_, hir_id, _, None) = pat[0].kind + && path_to_local_id(arm.body, hir_id) + { + return true; } false } @@ -1763,14 +1796,12 @@ pub fn is_try<'tcx>(cx: &LateContext<'_>, expr: &'tcx Expr<'tcx>) -> Option<&'tc return Some(expr); } - if_chain! { - if arms.len() == 2; - if arms[0].guard.is_none(); - if arms[1].guard.is_none(); - if (is_ok(cx, &arms[0]) && is_err(cx, &arms[1])) || (is_ok(cx, &arms[1]) && is_err(cx, &arms[0])); - then { - return Some(expr); - } + if arms.len() == 2 + && arms[0].guard.is_none() + && arms[1].guard.is_none() + && ((is_ok(cx, &arms[0]) && is_err(cx, &arms[1])) || (is_ok(cx, &arms[1]) && is_err(cx, &arms[0]))) + { + return Some(expr); } } @@ -1887,14 +1918,12 @@ pub fn match_function_call<'tcx>( expr: &'tcx Expr<'_>, path: &[&str], ) -> Option<&'tcx [Expr<'tcx>]> { - if_chain! { - if let ExprKind::Call(fun, args) = expr.kind; - if let ExprKind::Path(ref qpath) = fun.kind; - if let Some(fun_def_id) = cx.qpath_res(qpath, fun.hir_id).opt_def_id(); - if match_def_path(cx, fun_def_id, path); - then { - return Some(args); - } + if let ExprKind::Call(fun, args) = expr.kind + && let ExprKind::Path(ref qpath) = fun.kind + && let Some(fun_def_id) = cx.qpath_res(qpath, fun.hir_id).opt_def_id() + && match_def_path(cx, fun_def_id, path) + { + return Some(args); }; None } @@ -1904,13 +1933,11 @@ pub fn match_function_call_with_def_id<'tcx>( expr: &'tcx Expr<'_>, fun_def_id: DefId, ) -> Option<&'tcx [Expr<'tcx>]> { - if_chain! { - if let ExprKind::Call(fun, args) = expr.kind; - if let ExprKind::Path(ref qpath) = fun.kind; - if cx.qpath_res(qpath, fun.hir_id).opt_def_id() == Some(fun_def_id); - then { - return Some(args); - } + if let ExprKind::Call(fun, args) = expr.kind + && let ExprKind::Path(ref qpath) = fun.kind + && cx.qpath_res(qpath, fun.hir_id).opt_def_id() == Some(fun_def_id) + { + return Some(args); }; None } @@ -2008,10 +2035,10 @@ pub fn get_async_fn_body<'tcx>(tcx: TyCtxt<'tcx>, body: &Body<'_>) -> Option<&'t // check if expr is calling method or function with #[must_use] attribute pub fn is_must_use_func_call(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool { let did = match expr.kind { - ExprKind::Call(path, _) => if_chain! { - if let ExprKind::Path(ref qpath) = path.kind; - if let def::Res::Def(_, did) = cx.qpath_res(qpath, path.hir_id); - then { + ExprKind::Call(path, _) => { + if let ExprKind::Path(ref qpath) = path.kind + && let def::Res::Def(_, did) = cx.qpath_res(qpath, path.hir_id) + { Some(did) } else { None @@ -2034,6 +2061,18 @@ pub fn is_must_use_func_call(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool { /// Consider calling [`is_expr_untyped_identity_function`] or [`is_expr_identity_function`] instead. fn is_body_identity_function(cx: &LateContext<'_>, func: &Body<'_>) -> bool { fn check_pat(cx: &LateContext<'_>, pat: &Pat<'_>, expr: &Expr<'_>) -> bool { + if cx + .typeck_results() + .pat_binding_modes() + .get(pat.hir_id) + .is_some_and(|mode| matches!(mode, BindingMode::BindByReference(_))) + { + // If a tuple `(x, y)` is of type `&(i32, i32)`, then due to match ergonomics, + // the inner patterns become references. Don't consider this the identity function + // as that changes types. + return false; + } + match (pat.kind, expr.kind) { (PatKind::Binding(_, id, _, _), _) => { path_to_local_id(expr, id) && cx.typeck_results().expr_adjustments(expr).is_empty() @@ -2071,14 +2110,12 @@ fn is_body_identity_function(cx: &LateContext<'_>, func: &Body<'_>) -> bool { }, _, ) => { - if_chain! { - if let StmtKind::Semi(e) | StmtKind::Expr(e) = stmt.kind; - if let ExprKind::Ret(Some(ret_val)) = e.kind; - then { - expr = ret_val; - } else { - return false; - } + if let StmtKind::Semi(e) | StmtKind::Expr(e) = stmt.kind + && let ExprKind::Ret(Some(ret_val)) = e.kind + { + expr = ret_val; + } else { + return false; } }, _ => return check_pat(cx, param.pat, expr), @@ -2530,7 +2567,7 @@ pub fn inherits_cfg(tcx: TyCtxt<'_>, def_id: LocalDefId) -> bool { tcx.has_attr(def_id, sym::cfg) || hir - .parent_iter(hir.local_def_id_to_hir_id(def_id)) + .parent_iter(tcx.local_def_id_to_hir_id(def_id)) .flat_map(|(parent_id, _)| hir.attrs(parent_id)) .any(|attr| attr.has_name(sym::cfg)) } @@ -2650,11 +2687,11 @@ impl<'tcx> ExprUseNode<'tcx> { .and(Binder::dummy(cx.tcx.type_of(id).instantiate_identity())), )), Self::Return(id) => { - let hir_id = cx.tcx.hir().local_def_id_to_hir_id(id.def_id); + let hir_id = cx.tcx.local_def_id_to_hir_id(id.def_id); if let Some(Node::Expr(Expr { kind: ExprKind::Closure(c), .. - })) = cx.tcx.hir().find(hir_id) + })) = cx.tcx.opt_hir_node(hir_id) { match c.fn_decl.output { FnRetTy::DefaultReturn(_) => None, @@ -2720,7 +2757,7 @@ pub fn expr_use_ctxt<'tcx>(cx: &LateContext<'tcx>, e: &'tcx Expr<'tcx>) -> Optio walk_to_expr_usage(cx, e, &mut |parent, child_id| { // LocalTableInContext returns the wrong lifetime, so go use `expr_adjustments` instead. if adjustments.is_empty() - && let Node::Expr(e) = cx.tcx.hir().get(child_id) + && let Node::Expr(e) = cx.tcx.hir_node(child_id) { adjustments = cx.typeck_results().expr_adjustments(e); } @@ -2974,3 +3011,248 @@ pub fn pat_is_wild<'tcx>(cx: &LateContext<'tcx>, pat: &'tcx PatKind<'_>, body: i _ => false, } } + +#[derive(Clone, Copy)] +pub enum RequiresSemi { + Yes, + No, +} +impl RequiresSemi { + pub fn requires_semi(self) -> bool { + matches!(self, Self::Yes) + } +} + +/// Check if the expression return `!`, a type coerced from `!`, or could return `!` if the final +/// expression were turned into a statement. +#[expect(clippy::too_many_lines)] +pub fn is_never_expr<'tcx>(cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) -> Option<RequiresSemi> { + struct BreakTarget { + id: HirId, + unused: bool, + } + + struct V<'cx, 'tcx> { + cx: &'cx LateContext<'tcx>, + break_targets: Vec<BreakTarget>, + break_targets_for_result_ty: u32, + in_final_expr: bool, + requires_semi: bool, + is_never: bool, + } + + impl<'tcx> V<'_, 'tcx> { + fn push_break_target(&mut self, id: HirId) { + self.break_targets.push(BreakTarget { id, unused: true }); + self.break_targets_for_result_ty += u32::from(self.in_final_expr); + } + } + + impl<'tcx> Visitor<'tcx> for V<'_, 'tcx> { + fn visit_expr(&mut self, e: &'tcx Expr<'_>) { + // Note: Part of the complexity here comes from the fact that + // coercions are applied to the innermost expression. + // e.g. In `let x: u32 = { break () };` the never-to-any coercion + // is applied to the break expression. This means we can't just + // check the block's type as it will be `u32` despite the fact + // that the block always diverges. + + // The rest of the complexity comes from checking blocks which + // syntactically return a value, but will always diverge before + // reaching that point. + // e.g. In `let x = { foo(panic!()) };` the block's type will be the + // return type of `foo` even though it will never actually run. This + // can be trivially fixed by adding a semicolon after the call, but + // we must first detect that a semicolon is needed to make that + // suggestion. + + if self.is_never && self.break_targets.is_empty() { + if self.in_final_expr && !self.requires_semi { + // This expression won't ever run, but we still need to check + // if it can affect the type of the final expression. + match e.kind { + ExprKind::DropTemps(e) => self.visit_expr(e), + ExprKind::If(_, then, Some(else_)) => { + self.visit_expr(then); + self.visit_expr(else_); + }, + ExprKind::Match(_, arms, _) => { + for arm in arms { + self.visit_expr(arm.body); + } + }, + ExprKind::Loop(b, ..) => { + self.push_break_target(e.hir_id); + self.in_final_expr = false; + self.visit_block(b); + self.break_targets.pop(); + }, + ExprKind::Block(b, _) => { + if b.targeted_by_break { + self.push_break_target(b.hir_id); + self.visit_block(b); + self.break_targets.pop(); + } else { + self.visit_block(b); + } + }, + _ => { + self.requires_semi = !self.cx.typeck_results().expr_ty(e).is_never(); + }, + } + } + return; + } + match e.kind { + ExprKind::DropTemps(e) => self.visit_expr(e), + ExprKind::Ret(None) | ExprKind::Continue(_) => self.is_never = true, + ExprKind::Ret(Some(e)) | ExprKind::Become(e) => { + self.in_final_expr = false; + self.visit_expr(e); + self.is_never = true; + }, + ExprKind::Break(dest, e) => { + if let Some(e) = e { + self.in_final_expr = false; + self.visit_expr(e); + } + if let Ok(id) = dest.target_id + && let Some((i, target)) = self + .break_targets + .iter_mut() + .enumerate() + .find(|(_, target)| target.id == id) + { + target.unused &= self.is_never; + if i < self.break_targets_for_result_ty as usize { + self.requires_semi = true; + } + } + self.is_never = true; + }, + ExprKind::If(cond, then, else_) => { + let in_final_expr = mem::replace(&mut self.in_final_expr, false); + self.visit_expr(cond); + self.in_final_expr = in_final_expr; + + if self.is_never { + self.visit_expr(then); + if let Some(else_) = else_ { + self.visit_expr(else_); + } + } else { + self.visit_expr(then); + let is_never = mem::replace(&mut self.is_never, false); + if let Some(else_) = else_ { + self.visit_expr(else_); + self.is_never &= is_never; + } + } + }, + ExprKind::Match(scrutinee, arms, _) => { + let in_final_expr = mem::replace(&mut self.in_final_expr, false); + self.visit_expr(scrutinee); + self.in_final_expr = in_final_expr; + + if self.is_never { + for arm in arms { + self.visit_arm(arm); + } + } else { + let mut is_never = true; + for arm in arms { + self.is_never = false; + if let Some(guard) = arm.guard { + let in_final_expr = mem::replace(&mut self.in_final_expr, false); + self.visit_expr(guard.body()); + self.in_final_expr = in_final_expr; + // The compiler doesn't consider diverging guards as causing the arm to diverge. + self.is_never = false; + } + self.visit_expr(arm.body); + is_never &= self.is_never; + } + self.is_never = is_never; + } + }, + ExprKind::Loop(b, _, _, _) => { + self.push_break_target(e.hir_id); + self.in_final_expr = false; + self.visit_block(b); + self.is_never = self.break_targets.pop().unwrap().unused; + }, + ExprKind::Block(b, _) => { + if b.targeted_by_break { + self.push_break_target(b.hir_id); + self.visit_block(b); + self.is_never &= self.break_targets.pop().unwrap().unused; + } else { + self.visit_block(b); + } + }, + _ => { + self.in_final_expr = false; + walk_expr(self, e); + self.is_never |= self.cx.typeck_results().expr_ty(e).is_never(); + }, + } + } + + fn visit_block(&mut self, b: &'tcx Block<'_>) { + let in_final_expr = mem::replace(&mut self.in_final_expr, false); + for s in b.stmts { + self.visit_stmt(s); + } + self.in_final_expr = in_final_expr; + if let Some(e) = b.expr { + self.visit_expr(e); + } + } + + fn visit_local(&mut self, l: &'tcx Local<'_>) { + if let Some(e) = l.init { + self.visit_expr(e); + } + if let Some(else_) = l.els { + let is_never = self.is_never; + self.visit_block(else_); + self.is_never = is_never; + } + } + + fn visit_arm(&mut self, arm: &Arm<'tcx>) { + if let Some(guard) = arm.guard { + let in_final_expr = mem::replace(&mut self.in_final_expr, false); + self.visit_expr(guard.body()); + self.in_final_expr = in_final_expr; + } + self.visit_expr(arm.body); + } + } + + if cx.typeck_results().expr_ty(e).is_never() { + Some(RequiresSemi::No) + } else if let ExprKind::Block(b, _) = e.kind + && !b.targeted_by_break + && b.expr.is_none() + { + // If a block diverges without a final expression then it's type is `!`. + None + } else { + let mut v = V { + cx, + break_targets: Vec::new(), + break_targets_for_result_ty: 0, + in_final_expr: true, + requires_semi: false, + is_never: false, + }; + v.visit_expr(e); + v.is_never + .then_some(if v.requires_semi && matches!(e.kind, ExprKind::Block(..)) { + RequiresSemi::Yes + } else { + RequiresSemi::No + }) + } +} diff --git a/src/tools/clippy/clippy_utils/src/paths.rs b/src/tools/clippy/clippy_utils/src/paths.rs index 5bca55437..0a820a175 100644 --- a/src/tools/clippy/clippy_utils/src/paths.rs +++ b/src/tools/clippy/clippy_utils/src/paths.rs @@ -32,7 +32,15 @@ pub const FUTURES_IO_ASYNCREADEXT: [&str; 3] = ["futures_util", "io", "AsyncRead pub const FUTURES_IO_ASYNCWRITEEXT: [&str; 3] = ["futures_util", "io", "AsyncWriteExt"]; pub const HASHMAP_CONTAINS_KEY: [&str; 6] = ["std", "collections", "hash", "map", "HashMap", "contains_key"]; pub const HASHMAP_INSERT: [&str; 6] = ["std", "collections", "hash", "map", "HashMap", "insert"]; +pub const HASHMAP_ITER: [&str; 5] = ["std", "collections", "hash", "map", "Iter"]; +pub const HASHMAP_ITER_MUT: [&str; 5] = ["std", "collections", "hash", "map", "IterMut"]; +pub const HASHMAP_KEYS: [&str; 5] = ["std", "collections", "hash", "map", "Keys"]; +pub const HASHMAP_VALUES: [&str; 5] = ["std", "collections", "hash", "map", "Values"]; +pub const HASHMAP_DRAIN: [&str; 5] = ["std", "collections", "hash", "map", "Drain"]; +pub const HASHMAP_VALUES_MUT: [&str; 5] = ["std", "collections", "hash", "map", "ValuesMut"]; +pub const HASHSET_ITER_TY: [&str; 5] = ["std", "collections", "hash", "set", "Iter"]; pub const HASHSET_ITER: [&str; 6] = ["std", "collections", "hash", "set", "HashSet", "iter"]; +pub const HASHSET_DRAIN: [&str; 5] = ["std", "collections", "hash", "set", "Drain"]; pub const IDENT: [&str; 3] = ["rustc_span", "symbol", "Ident"]; pub const IDENT_AS_STR: [&str; 4] = ["rustc_span", "symbol", "Ident", "as_str"]; pub const INSERT_STR: [&str; 4] = ["alloc", "string", "String", "insert_str"]; @@ -99,3 +107,4 @@ pub const OPTION_UNWRAP: [&str; 4] = ["core", "option", "Option", "unwrap"]; pub const OPTION_EXPECT: [&str; 4] = ["core", "option", "Option", "expect"]; #[expect(clippy::invalid_paths)] // not sure why it thinks this, it works so pub const BOOL_THEN: [&str; 4] = ["core", "bool", "<impl bool>", "then"]; +pub const ALLOCATOR_GLOBAL: [&str; 3] = ["alloc", "alloc", "Global"]; diff --git a/src/tools/clippy/clippy_utils/src/sugg.rs b/src/tools/clippy/clippy_utils/src/sugg.rs index db79dd788..9b2bc8df1 100644 --- a/src/tools/clippy/clippy_utils/src/sugg.rs +++ b/src/tools/clippy/clippy_utils/src/sugg.rs @@ -159,7 +159,7 @@ impl<'a> Sugg<'a> { Sugg::BinOp(hirbinop2assignop(op), get_snippet(lhs.span), get_snippet(rhs.span)) }, hir::ExprKind::Binary(op, lhs, rhs) => Sugg::BinOp( - AssocOp::from_ast_binop(op.node.into()), + AssocOp::from_ast_binop(op.node), get_snippet(lhs.span), get_snippet(rhs.span), ), @@ -380,10 +380,7 @@ fn binop_to_string(op: AssocOp, lhs: &str, rhs: &str) -> String { | AssocOp::NotEqual | AssocOp::Greater | AssocOp::GreaterEqual => { - format!( - "{lhs} {} {rhs}", - op.to_ast_binop().expect("Those are AST ops").to_string() - ) + format!("{lhs} {} {rhs}", op.to_ast_binop().expect("Those are AST ops").as_str()) }, AssocOp::Assign => format!("{lhs} = {rhs}"), AssocOp::AssignOp(op) => { diff --git a/src/tools/clippy/clippy_utils/src/ty.rs b/src/tools/clippy/clippy_utils/src/ty.rs index 842a206f9..61d0663aa 100644 --- a/src/tools/clippy/clippy_utils/src/ty.rs +++ b/src/tools/clippy/clippy_utils/src/ty.rs @@ -214,7 +214,17 @@ pub fn implements_trait<'tcx>( trait_id: DefId, args: &[GenericArg<'tcx>], ) -> bool { - implements_trait_with_env_from_iter(cx.tcx, cx.param_env, ty, trait_id, args.iter().map(|&x| Some(x))) + let callee_id = cx + .enclosing_body + .map(|body| cx.tcx.hir().body_owner(body).owner.to_def_id()); + implements_trait_with_env_from_iter( + cx.tcx, + cx.param_env, + ty, + trait_id, + callee_id, + args.iter().map(|&x| Some(x)), + ) } /// Same as `implements_trait` but allows using a `ParamEnv` different from the lint context. @@ -223,9 +233,17 @@ pub fn implements_trait_with_env<'tcx>( param_env: ParamEnv<'tcx>, ty: Ty<'tcx>, trait_id: DefId, + callee_id: DefId, args: &[GenericArg<'tcx>], ) -> bool { - implements_trait_with_env_from_iter(tcx, param_env, ty, trait_id, args.iter().map(|&x| Some(x))) + implements_trait_with_env_from_iter( + tcx, + param_env, + ty, + trait_id, + Some(callee_id), + args.iter().map(|&x| Some(x)), + ) } /// Same as `implements_trait_from_env` but takes the arguments as an iterator. @@ -234,6 +252,7 @@ pub fn implements_trait_with_env_from_iter<'tcx>( param_env: ParamEnv<'tcx>, ty: Ty<'tcx>, trait_id: DefId, + callee_id: Option<DefId>, args: impl IntoIterator<Item = impl Into<Option<GenericArg<'tcx>>>>, ) -> bool { // Clippy shouldn't have infer types @@ -245,20 +264,36 @@ pub fn implements_trait_with_env_from_iter<'tcx>( } let infcx = tcx.infer_ctxt().build(); + let args = args + .into_iter() + .map(|arg| { + arg.into().unwrap_or_else(|| { + let orig = TypeVariableOrigin { + kind: TypeVariableOriginKind::MiscVariable, + span: DUMMY_SP, + }; + infcx.next_ty_var(orig).into() + }) + }) + .collect::<Vec<_>>(); + + // If an effect arg was not specified, we need to specify it. + let effect_arg = if tcx + .generics_of(trait_id) + .host_effect_index + .is_some_and(|x| args.get(x - 1).is_none()) + { + Some(GenericArg::from(callee_id.map_or(tcx.consts.true_, |def_id| { + tcx.expected_host_effect_param_for_body(def_id) + }))) + } else { + None + }; + let trait_ref = TraitRef::new( tcx, trait_id, - Some(GenericArg::from(ty)) - .into_iter() - .chain(args.into_iter().map(|arg| { - arg.into().unwrap_or_else(|| { - let orig = TypeVariableOrigin { - kind: TypeVariableOriginKind::MiscVariable, - span: DUMMY_SP, - }; - infcx.next_ty_var(orig).into() - }) - })), + Some(GenericArg::from(ty)).into_iter().chain(args).chain(effect_arg), ); debug_assert_matches!( @@ -694,7 +729,7 @@ pub fn ty_sig<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>) -> Option<ExprFnSig<'t ty::Closure(id, subs) => { let decl = id .as_local() - .and_then(|id| cx.tcx.hir().fn_decl_by_hir_id(cx.tcx.hir().local_def_id_to_hir_id(id))); + .and_then(|id| cx.tcx.hir().fn_decl_by_hir_id(cx.tcx.local_def_id_to_hir_id(id))); Some(ExprFnSig::Closure(decl, subs.as_closure().sig())) }, ty::FnDef(id, subs) => Some(ExprFnSig::Sig(cx.tcx.fn_sig(id).instantiate(cx.tcx, subs), Some(id))), @@ -890,7 +925,7 @@ pub fn for_each_top_level_late_bound_region<B>( impl<'tcx, B, F: FnMut(BoundRegion) -> ControlFlow<B>> TypeVisitor<TyCtxt<'tcx>> for V<F> { type BreakTy = B; fn visit_region(&mut self, r: Region<'tcx>) -> ControlFlow<Self::BreakTy> { - if let RegionKind::ReLateBound(idx, bound) = r.kind() + if let RegionKind::ReBound(idx, bound) = r.kind() && idx.as_u32() == self.index { (self.f)(bound) @@ -1169,7 +1204,7 @@ pub fn make_normalized_projection<'tcx>( debug_assert!( false, "args contain late-bound region at index `{i}` which can't be normalized.\n\ - use `TyCtxt::erase_late_bound_regions`\n\ + use `TyCtxt::instantiate_bound_regions_with_erased`\n\ note: arg is `{arg:#?}`", ); return None; @@ -1247,7 +1282,7 @@ pub fn make_normalized_projection_with_regions<'tcx>( debug_assert!( false, "args contain late-bound region at index `{i}` which can't be normalized.\n\ - use `TyCtxt::erase_late_bound_regions`\n\ + use `TyCtxt::instantiate_bound_regions_with_erased`\n\ note: arg is `{arg:#?}`", ); return None; @@ -1276,3 +1311,8 @@ pub fn normalize_with_regions<'tcx>(tcx: TyCtxt<'tcx>, param_env: ParamEnv<'tcx> Err(_) => ty, } } + +/// Checks if the type is `core::mem::ManuallyDrop<_>` +pub fn is_manually_drop(ty: Ty<'_>) -> bool { + ty.ty_adt_def().map_or(false, AdtDef::is_manually_drop) +} diff --git a/src/tools/clippy/clippy_utils/src/ty/type_certainty/mod.rs b/src/tools/clippy/clippy_utils/src/ty/type_certainty/mod.rs index 76fa15e15..da71fc3aa 100644 --- a/src/tools/clippy/clippy_utils/src/ty/type_certainty/mod.rs +++ b/src/tools/clippy/clippy_utils/src/ty/type_certainty/mod.rs @@ -170,19 +170,18 @@ fn qpath_certainty(cx: &LateContext<'_>, qpath: &QPath<'_>, resolves_to_type: bo path_segment_certainty(cx, type_certainty(cx, ty), path_segment, resolves_to_type) }, - QPath::LangItem(lang_item, _, _) => { - cx.tcx - .lang_items() - .get(*lang_item) - .map_or(Certainty::Uncertain, |def_id| { - let generics = cx.tcx.generics_of(def_id); - if generics.parent_count == 0 && generics.params.is_empty() { - Certainty::Certain(if resolves_to_type { Some(def_id) } else { None }) - } else { - Certainty::Uncertain - } - }) - }, + QPath::LangItem(lang_item, ..) => cx + .tcx + .lang_items() + .get(*lang_item) + .map_or(Certainty::Uncertain, |def_id| { + let generics = cx.tcx.generics_of(def_id); + if generics.parent_count == 0 && generics.params.is_empty() { + Certainty::Certain(if resolves_to_type { Some(def_id) } else { None }) + } else { + Certainty::Uncertain + } + }), }; debug_assert!(resolves_to_type || certainty.to_def_id().is_none()); certainty diff --git a/src/tools/clippy/declare_clippy_lint/Cargo.toml b/src/tools/clippy/declare_clippy_lint/Cargo.toml index beea9fd00..af123e107 100644 --- a/src/tools/clippy/declare_clippy_lint/Cargo.toml +++ b/src/tools/clippy/declare_clippy_lint/Cargo.toml @@ -1,6 +1,6 @@ [package] name = "declare_clippy_lint" -version = "0.1.75" +version = "0.1.76" edition = "2021" publish = false @@ -8,7 +8,7 @@ publish = false proc-macro = true [dependencies] -itertools = "0.10.1" +itertools = "0.11" quote = "1.0.21" syn = "2.0" diff --git a/src/tools/clippy/declare_clippy_lint/src/lib.rs b/src/tools/clippy/declare_clippy_lint/src/lib.rs index dc3037f66..25b2fc939 100644 --- a/src/tools/clippy/declare_clippy_lint/src/lib.rs +++ b/src/tools/clippy/declare_clippy_lint/src/lib.rs @@ -148,7 +148,7 @@ pub fn declare_clippy_lint(input: TokenStream) -> TokenStream { let category_variant = format_ident!("{category}"); let output = quote! { - declare_tool_lint! { + rustc_session::declare_tool_lint! { #(#attrs)* pub clippy::#name, #level, diff --git a/src/tools/clippy/lintcheck/src/main.rs b/src/tools/clippy/lintcheck/src/main.rs index 58cb42316..88966b41f 100644 --- a/src/tools/clippy/lintcheck/src/main.rs +++ b/src/tools/clippy/lintcheck/src/main.rs @@ -309,7 +309,7 @@ impl Crate { target_dir_index: &AtomicUsize, total_crates_to_lint: usize, config: &LintcheckConfig, - lint_filter: &Vec<String>, + lint_filter: &[String], server: &Option<LintcheckServer>, ) -> Vec<ClippyWarning> { // advance the atomic index by one @@ -367,7 +367,7 @@ impl Crate { // // The wrapper is set to the `lintcheck` so we can force enable linting and ignore certain crates // (see `crate::driver`) - let status = Command::new("cargo") + let status = Command::new(env::var("CARGO").unwrap_or("cargo".into())) .arg("check") .arg("--quiet") .current_dir(&self.path) @@ -441,7 +441,7 @@ impl Crate { /// Builds clippy inside the repo to make sure we have a clippy executable we can use. fn build_clippy() { - let status = Command::new("cargo") + let status = Command::new(env::var("CARGO").unwrap_or("cargo".into())) .arg("build") .status() .expect("Failed to build clippy!"); @@ -728,7 +728,7 @@ fn read_stats_from_file(file_path: &Path) -> HashMap<String, usize> { } /// print how lint counts changed between runs -fn print_stats(old_stats: HashMap<String, usize>, new_stats: HashMap<&String, usize>, lint_filter: &Vec<String>) { +fn print_stats(old_stats: HashMap<String, usize>, new_stats: HashMap<&String, usize>, lint_filter: &[String]) { let same_in_both_hashmaps = old_stats .iter() .filter(|(old_key, old_val)| new_stats.get::<&String>(old_key) == Some(old_val)) @@ -816,7 +816,7 @@ fn lintcheck_test() { "--crates-toml", "lintcheck/test_sources.toml", ]; - let status = std::process::Command::new("cargo") + let status = std::process::Command::new(env::var("CARGO").unwrap_or("cargo".into())) .args(args) .current_dir("..") // repo root .status(); diff --git a/src/tools/clippy/rust-toolchain b/src/tools/clippy/rust-toolchain index 293fcbf39..d575da6de 100644 --- a/src/tools/clippy/rust-toolchain +++ b/src/tools/clippy/rust-toolchain @@ -1,3 +1,3 @@ [toolchain] -channel = "nightly-2023-11-02" +channel = "nightly-2023-12-16" components = ["cargo", "llvm-tools", "rust-src", "rust-std", "rustc", "rustc-dev", "rustfmt"] diff --git a/src/tools/clippy/src/driver.rs b/src/tools/clippy/src/driver.rs index 7bb49d08d..b944a2992 100644 --- a/src/tools/clippy/src/driver.rs +++ b/src/tools/clippy/src/driver.rs @@ -18,7 +18,7 @@ extern crate rustc_span; use rustc_interface::interface; use rustc_session::config::ErrorOutputType; use rustc_session::parse::ParseSess; -use rustc_session::EarlyErrorHandler; +use rustc_session::EarlyDiagCtxt; use rustc_span::symbol::Symbol; use std::env; @@ -148,7 +148,7 @@ impl rustc_driver::Callbacks for ClippyCallbacks { } let conf = clippy_config::Conf::read(sess, &conf_path); - clippy_lints::register_plugins(lint_store, sess, conf); + clippy_lints::register_lints(lint_store, conf); clippy_lints::register_pre_expansion_lints(lint_store, conf); clippy_lints::register_renamed(lint_store); })); @@ -174,16 +174,16 @@ const BUG_REPORT_URL: &str = "https://github.com/rust-lang/rust-clippy/issues/ne #[allow(clippy::too_many_lines)] #[allow(clippy::ignored_unit_patterns)] pub fn main() { - let handler = EarlyErrorHandler::new(ErrorOutputType::default()); + let early_dcx = EarlyDiagCtxt::new(ErrorOutputType::default()); - rustc_driver::init_rustc_env_logger(&handler); + rustc_driver::init_rustc_env_logger(&early_dcx); let using_internal_features = rustc_driver::install_ice_hook(BUG_REPORT_URL, |handler| { // FIXME: this macro calls unwrap internally but is called in a panicking context! It's not // as simple as moving the call from the hook to main, because `install_ice_hook` doesn't // accept a generic closure. let version_info = rustc_tools_util::get_version_info!(); - handler.note_without_error(format!("Clippy version: {version_info}")); + handler.note(format!("Clippy version: {version_info}")); }); exit(rustc_driver::catch_with_exit_code(move || { diff --git a/src/tools/clippy/src/main.rs b/src/tools/clippy/src/main.rs index bbf7d22c8..dffa85417 100644 --- a/src/tools/clippy/src/main.rs +++ b/src/tools/clippy/src/main.rs @@ -105,7 +105,7 @@ impl ClippyCmd { } fn into_std_cmd(self) -> Command { - let mut cmd = Command::new("cargo"); + let mut cmd = Command::new(env::var("CARGO").unwrap_or("cargo".into())); let clippy_args: String = self .clippy_args .iter() diff --git a/src/tools/clippy/tests/headers.rs b/src/tools/clippy/tests/headers.rs index 7eec9a9cd..d1f986ef5 100644 --- a/src/tools/clippy/tests/headers.rs +++ b/src/tools/clippy/tests/headers.rs @@ -12,7 +12,12 @@ fn old_test_headers() { for entry in WalkDir::new("tests") { let entry = entry.unwrap(); - if !entry.file_type().is_file() { + let is_hidden_file = entry + .file_name() + .to_str() + .expect("non-UTF-8 file name") + .starts_with('.'); + if is_hidden_file || !entry.file_type().is_file() { continue; } diff --git a/src/tools/clippy/tests/integration.rs b/src/tools/clippy/tests/integration.rs index 031982edb..267f095f9 100644 --- a/src/tools/clippy/tests/integration.rs +++ b/src/tools/clippy/tests/integration.rs @@ -69,15 +69,15 @@ fn integration_test() { // debug: eprintln!("{stderr}"); - // this is an internal test to make sure we would correctly panic on a delay_span_bug + // this is an internal test to make sure we would correctly panic on a span_delayed_bug if repo_name == "matthiaskrgr/clippy_ci_panic_test" { // we need to kind of switch around our logic here: // if we find a panic, everything is fine, if we don't panic, SOMETHING is broken about our testing - // the repo basically just contains a delay_span_bug that forces rustc/clippy to panic: + // the repo basically just contains a span_delayed_bug that forces rustc/clippy to panic: /* #![feature(rustc_attrs)] - #[rustc_error(delay_span_bug_from_inside_query)] + #[rustc_error(span_delayed_bug_from_inside_query)] fn main() {} */ @@ -86,7 +86,7 @@ fn integration_test() { return; } - panic!("panic caused by delay_span_bug was NOT detected! Something is broken!"); + panic!("panic caused by span_delayed_bug was NOT detected! Something is broken!"); } if let Some(backtrace_start) = stderr.find("error: internal compiler error") { diff --git a/src/tools/clippy/tests/ui-cargo/module_style/fail_mod_remap/Cargo.stderr b/src/tools/clippy/tests/ui-cargo/module_style/fail_mod_remap/Cargo.stderr index d776feb7f..bdceb7526 100644 --- a/src/tools/clippy/tests/ui-cargo/module_style/fail_mod_remap/Cargo.stderr +++ b/src/tools/clippy/tests/ui-cargo/module_style/fail_mod_remap/Cargo.stderr @@ -8,4 +8,4 @@ error: `mod.rs` files are required, found `src/bad.rs` = note: `-D clippy::self-named-module-files` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::self_named_module_files)]` -error: could not compile `fail-mod-remap` (bin "fail-mod-remap") due to previous error +error: could not compile `fail-mod-remap` (bin "fail-mod-remap") due to 1 previous error diff --git a/src/tools/clippy/tests/ui-cargo/module_style/fail_no_mod/Cargo.stderr b/src/tools/clippy/tests/ui-cargo/module_style/fail_no_mod/Cargo.stderr index 22558bc4c..06eaa071e 100644 --- a/src/tools/clippy/tests/ui-cargo/module_style/fail_no_mod/Cargo.stderr +++ b/src/tools/clippy/tests/ui-cargo/module_style/fail_no_mod/Cargo.stderr @@ -8,4 +8,4 @@ error: `mod.rs` files are not allowed, found `src/bad/mod.rs` = note: `-D clippy::mod-module-files` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::mod_module_files)]` -error: could not compile `fail-no-mod` (bin "fail-no-mod") due to previous error +error: could not compile `fail-no-mod` (bin "fail-no-mod") due to 1 previous error diff --git a/src/tools/clippy/tests/ui-cargo/multiple_crate_versions/fail/Cargo.stderr b/src/tools/clippy/tests/ui-cargo/multiple_crate_versions/fail/Cargo.stderr index 4beedc108..39f7176ad 100644 --- a/src/tools/clippy/tests/ui-cargo/multiple_crate_versions/fail/Cargo.stderr +++ b/src/tools/clippy/tests/ui-cargo/multiple_crate_versions/fail/Cargo.stderr @@ -3,4 +3,4 @@ error: multiple versions for dependency `winapi`: 0.2.8, 0.3.9 = note: `-D clippy::multiple-crate-versions` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::multiple_crate_versions)]` -error: could not compile `multiple_crate_versions` (bin "multiple_crate_versions") due to previous error +error: could not compile `multiple_crate_versions` (bin "multiple_crate_versions") due to 1 previous error diff --git a/src/tools/clippy/tests/ui-cargo/wildcard_dependencies/fail/Cargo.stderr b/src/tools/clippy/tests/ui-cargo/wildcard_dependencies/fail/Cargo.stderr index 65a19bb07..a3539051b 100644 --- a/src/tools/clippy/tests/ui-cargo/wildcard_dependencies/fail/Cargo.stderr +++ b/src/tools/clippy/tests/ui-cargo/wildcard_dependencies/fail/Cargo.stderr @@ -3,4 +3,4 @@ error: wildcard dependency for `regex` = note: `-D clippy::wildcard-dependencies` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::wildcard_dependencies)]` -error: could not compile `wildcard_dependencies` (bin "wildcard_dependencies") due to previous error +error: could not compile `wildcard_dependencies` (bin "wildcard_dependencies") due to 1 previous error diff --git a/src/tools/clippy/tests/ui-internal/default_deprecation_reason.stderr b/src/tools/clippy/tests/ui-internal/default_deprecation_reason.stderr index ca26b649f..595e4c138 100644 --- a/src/tools/clippy/tests/ui-internal/default_deprecation_reason.stderr +++ b/src/tools/clippy/tests/ui-internal/default_deprecation_reason.stderr @@ -18,5 +18,5 @@ LL | #![deny(clippy::internal)] = note: `#[deny(clippy::default_deprecation_reason)]` implied by `#[deny(clippy::internal)]` = note: this error originates in the macro `declare_deprecated_lint` (in Nightly builds, run with -Z macro-backtrace for more info) -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-internal/default_lint.stderr b/src/tools/clippy/tests/ui-internal/default_lint.stderr index 8961bd462..ab2470210 100644 --- a/src/tools/clippy/tests/ui-internal/default_lint.stderr +++ b/src/tools/clippy/tests/ui-internal/default_lint.stderr @@ -17,5 +17,5 @@ LL | #![deny(clippy::internal)] = note: `#[deny(clippy::default_lint)]` implied by `#[deny(clippy::internal)]` = note: this error originates in the macro `$crate::declare_tool_lint` which comes from the expansion of the macro `declare_tool_lint` (in Nightly builds, run with -Z macro-backtrace for more info) -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-internal/disallow_struct_span_lint.rs b/src/tools/clippy/tests/ui-internal/disallow_struct_span_lint.rs new file mode 100644 index 000000000..3155c0235 --- /dev/null +++ b/src/tools/clippy/tests/ui-internal/disallow_struct_span_lint.rs @@ -0,0 +1,27 @@ +#![feature(rustc_private)] + +extern crate rustc_errors; +extern crate rustc_hir; +extern crate rustc_lint; +extern crate rustc_middle; + +use rustc_errors::{DiagnosticMessage, MultiSpan}; +use rustc_hir::hir_id::HirId; +use rustc_lint::{Lint, LintContext}; +use rustc_middle::ty::TyCtxt; + +pub fn a(cx: impl LintContext, lint: &'static Lint, span: impl Into<MultiSpan>, msg: impl Into<DiagnosticMessage>) { + cx.struct_span_lint(lint, span, msg, |b| b); +} + +pub fn b( + tcx: TyCtxt<'_>, + lint: &'static Lint, + hir_id: HirId, + span: impl Into<MultiSpan>, + msg: impl Into<DiagnosticMessage>, +) { + tcx.struct_span_lint_hir(lint, hir_id, span, msg, |b| b); +} + +fn main() {} diff --git a/src/tools/clippy/tests/ui-internal/disallow_struct_span_lint.stderr b/src/tools/clippy/tests/ui-internal/disallow_struct_span_lint.stderr new file mode 100644 index 000000000..76c487fb1 --- /dev/null +++ b/src/tools/clippy/tests/ui-internal/disallow_struct_span_lint.stderr @@ -0,0 +1,17 @@ +error: use of a disallowed method `rustc_lint::context::LintContext::struct_span_lint` + --> $DIR/disallow_struct_span_lint.rs:14:5 + | +LL | cx.struct_span_lint(lint, span, msg, |b| b); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: `-D clippy::disallowed-methods` implied by `-D warnings` + = help: to override `-D warnings` add `#[allow(clippy::disallowed_methods)]` + +error: use of a disallowed method `rustc_middle::ty::context::TyCtxt::struct_span_lint_hir` + --> $DIR/disallow_struct_span_lint.rs:24:5 + | +LL | tcx.struct_span_lint_hir(lint, hir_id, span, msg, |b| b); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +error: aborting due to 2 previous errors + diff --git a/src/tools/clippy/tests/ui-internal/if_chain_style.rs b/src/tools/clippy/tests/ui-internal/if_chain_style.rs deleted file mode 100644 index b462b20e0..000000000 --- a/src/tools/clippy/tests/ui-internal/if_chain_style.rs +++ /dev/null @@ -1,97 +0,0 @@ -#![warn(clippy::if_chain_style)] -#![allow( - clippy::needless_if, - clippy::no_effect, - clippy::nonminimal_bool, - clippy::missing_clippy_version_attribute -)] - -extern crate if_chain; - -use if_chain::if_chain; - -fn main() { - if true { - let x = ""; - // `if_chain!` inside `if` - if_chain! { - if true; - if true; - then {} - } - } - if_chain! { - if true - // multi-line AND'ed conditions - && false; - if let Some(1) = Some(1); - // `let` before `then` - let x = ""; - then { - (); - } - } - if_chain! { - // single `if` condition - if true; - then { - let x = ""; - // nested if - if true {} - } - } - if_chain! { - // starts with `let ..` - let x = ""; - if let Some(1) = Some(1); - then { - let x = ""; - let x = ""; - // nested if_chain! - if_chain! { - if true; - if true; - then {} - } - } - } -} - -fn negative() { - if true { - (); - if_chain! { - if true; - if true; - then { (); } - } - } - if_chain! { - if true; - let x = ""; - if true; - then { (); } - } - if_chain! { - if true; - if true; - then { - if true { 1 } else { 2 } - } else { - 3 - } - }; - if true { - if_chain! { - if true; - if true; - then {} - } - } else if false { - if_chain! { - if true; - if false; - then {} - } - } -} diff --git a/src/tools/clippy/tests/ui-internal/if_chain_style.stderr b/src/tools/clippy/tests/ui-internal/if_chain_style.stderr deleted file mode 100644 index ea0495532..000000000 --- a/src/tools/clippy/tests/ui-internal/if_chain_style.stderr +++ /dev/null @@ -1,86 +0,0 @@ -error: this `if` can be part of the inner `if_chain!` - --> $DIR/if_chain_style.rs:14:5 - | -LL | / if true { -LL | | let x = ""; -LL | | // `if_chain!` inside `if` -LL | | if_chain! { -... | -LL | | } -LL | | } - | |_____^ - | -help: this `let` statement can also be in the `if_chain!` - --> $DIR/if_chain_style.rs:15:9 - | -LL | let x = ""; - | ^^^^^^^^^^^ - = note: `-D clippy::if-chain-style` implied by `-D warnings` - = help: to override `-D warnings` add `#[allow(clippy::if_chain_style)]` - -error: `if a && b;` should be `if a; if b;` - --> $DIR/if_chain_style.rs:24:12 - | -LL | if true - | ____________^ -LL | | // multi-line AND'ed conditions -LL | | && false; - | |____________________^ - -error: `let` expression should be inside `then { .. }` - --> $DIR/if_chain_style.rs:29:9 - | -LL | let x = ""; - | ^^^^^^^^^^^ - -error: this `if` can be part of the outer `if_chain!` - --> $DIR/if_chain_style.rs:40:13 - | -LL | if true {} - | ^^^^^^^^^^ - | -help: this `let` statement can also be in the `if_chain!` - --> $DIR/if_chain_style.rs:38:13 - | -LL | let x = ""; - | ^^^^^^^^^^^ - -error: `if_chain!` only has one `if` - --> $DIR/if_chain_style.rs:34:5 - | -LL | / if_chain! { -LL | | // single `if` condition -LL | | if true; -LL | | then { -... | -LL | | } -LL | | } - | |_____^ - | - = note: this error originates in the macro `__if_chain` which comes from the expansion of the macro `if_chain` (in Nightly builds, run with -Z macro-backtrace for more info) - -error: `let` expression should be above the `if_chain!` - --> $DIR/if_chain_style.rs:45:9 - | -LL | let x = ""; - | ^^^^^^^^^^^ - -error: this `if_chain!` can be merged with the outer `if_chain!` - --> $DIR/if_chain_style.rs:51:13 - | -LL | / if_chain! { -LL | | if true; -LL | | if true; -LL | | then {} -LL | | } - | |_____________^ - | -help: these `let` statements can also be in the `if_chain!` - --> $DIR/if_chain_style.rs:48:13 - | -LL | / let x = ""; -LL | | let x = ""; - | |_______________________^ - -error: aborting due to 7 previous errors - diff --git a/src/tools/clippy/tests/ui-internal/lint_without_lint_pass.stderr b/src/tools/clippy/tests/ui-internal/lint_without_lint_pass.stderr index de04920b8..de55876b1 100644 --- a/src/tools/clippy/tests/ui-internal/lint_without_lint_pass.stderr +++ b/src/tools/clippy/tests/ui-internal/lint_without_lint_pass.stderr @@ -17,5 +17,5 @@ LL | #![deny(clippy::internal)] = note: `#[deny(clippy::lint_without_lint_pass)]` implied by `#[deny(clippy::internal)]` = note: this error originates in the macro `declare_tool_lint` (in Nightly builds, run with -Z macro-backtrace for more info) -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-internal/outer_expn_data.stderr b/src/tools/clippy/tests/ui-internal/outer_expn_data.stderr index e41ace472..0d5b01325 100644 --- a/src/tools/clippy/tests/ui-internal/outer_expn_data.stderr +++ b/src/tools/clippy/tests/ui-internal/outer_expn_data.stderr @@ -11,5 +11,5 @@ LL | #![deny(clippy::internal)] | ^^^^^^^^^^^^^^^^ = note: `#[deny(clippy::outer_expn_expn_data)]` implied by `#[deny(clippy::internal)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/bad_toml/conf_bad_toml.stderr b/src/tools/clippy/tests/ui-toml/bad_toml/conf_bad_toml.stderr index f7d53763a..c308b7aa0 100644 --- a/src/tools/clippy/tests/ui-toml/bad_toml/conf_bad_toml.stderr +++ b/src/tools/clippy/tests/ui-toml/bad_toml/conf_bad_toml.stderr @@ -4,5 +4,5 @@ error: error reading Clippy's configuration file: expected `.`, `=` LL | fn this_is_obviously(not: a, toml: file) { | ^ -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/bad_toml_type/conf_bad_type.stderr b/src/tools/clippy/tests/ui-toml/bad_toml_type/conf_bad_type.stderr index fb0a14081..1bcde2f30 100644 --- a/src/tools/clippy/tests/ui-toml/bad_toml_type/conf_bad_type.stderr +++ b/src/tools/clippy/tests/ui-toml/bad_toml_type/conf_bad_type.stderr @@ -4,5 +4,5 @@ error: error reading Clippy's configuration file: invalid type: integer `42`, ex LL | disallowed-names = 42 | ^^ -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/conf_deprecated_key/conf_deprecated_key.stderr b/src/tools/clippy/tests/ui-toml/conf_deprecated_key/conf_deprecated_key.stderr index a21952c0e..08fdb2d2d 100644 --- a/src/tools/clippy/tests/ui-toml/conf_deprecated_key/conf_deprecated_key.stderr +++ b/src/tools/clippy/tests/ui-toml/conf_deprecated_key/conf_deprecated_key.stderr @@ -20,5 +20,5 @@ LL | fn cognitive_complexity() { = note: `-D clippy::cognitive-complexity` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::cognitive_complexity)]` -error: aborting due to previous error; 2 warnings emitted +error: aborting due to 1 previous error; 2 warnings emitted diff --git a/src/tools/clippy/tests/ui-toml/decimal_literal_representation/decimal_literal_representation.stderr b/src/tools/clippy/tests/ui-toml/decimal_literal_representation/decimal_literal_representation.stderr index 6f817a3fd..4510275c9 100644 --- a/src/tools/clippy/tests/ui-toml/decimal_literal_representation/decimal_literal_representation.stderr +++ b/src/tools/clippy/tests/ui-toml/decimal_literal_representation/decimal_literal_representation.stderr @@ -7,5 +7,5 @@ LL | let _ = 16777215; = note: `-D clippy::decimal-literal-representation` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::decimal_literal_representation)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/disallowed_names_replace/disallowed_names.stderr b/src/tools/clippy/tests/ui-toml/disallowed_names_replace/disallowed_names.stderr index d9f25a3ee..a5fece575 100644 --- a/src/tools/clippy/tests/ui-toml/disallowed_names_replace/disallowed_names.stderr +++ b/src/tools/clippy/tests/ui-toml/disallowed_names_replace/disallowed_names.stderr @@ -7,5 +7,5 @@ LL | let ducks = ["quack", "quack"]; = note: `-D clippy::disallowed-names` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::disallowed_names)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/disallowed_script_idents/disallowed_script_idents.stderr b/src/tools/clippy/tests/ui-toml/disallowed_script_idents/disallowed_script_idents.stderr index 31bb5ee35..e83027e4e 100644 --- a/src/tools/clippy/tests/ui-toml/disallowed_script_idents/disallowed_script_idents.stderr +++ b/src/tools/clippy/tests/ui-toml/disallowed_script_idents/disallowed_script_idents.stderr @@ -7,5 +7,5 @@ LL | let カウンタ = 10; = note: `-D clippy::disallowed-script-idents` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::disallowed_script_idents)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/doc_valid_idents_append/doc_markdown.stderr b/src/tools/clippy/tests/ui-toml/doc_valid_idents_append/doc_markdown.stderr index 92b035058..877ca726f 100644 --- a/src/tools/clippy/tests/ui-toml/doc_valid_idents_append/doc_markdown.stderr +++ b/src/tools/clippy/tests/ui-toml/doc_valid_idents_append/doc_markdown.stderr @@ -11,5 +11,5 @@ help: try LL | /// `TestItemThingyOfCoolness` might sound cool but is not on the list and should be linted. | ~~~~~~~~~~~~~~~~~~~~~~~~~~ -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/duplicated_keys/duplicated_keys.stderr b/src/tools/clippy/tests/ui-toml/duplicated_keys/duplicated_keys.stderr index 7c56dfdb9..3f2086b5e 100644 --- a/src/tools/clippy/tests/ui-toml/duplicated_keys/duplicated_keys.stderr +++ b/src/tools/clippy/tests/ui-toml/duplicated_keys/duplicated_keys.stderr @@ -4,5 +4,5 @@ error: error reading Clippy's configuration file: duplicate key `cognitive-compl LL | cognitive-complexity-threshold = 4 | ^ -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/duplicated_keys_deprecated/duplicated_keys.stderr b/src/tools/clippy/tests/ui-toml/duplicated_keys_deprecated/duplicated_keys.stderr index 0af8c0add..3c3839633 100644 --- a/src/tools/clippy/tests/ui-toml/duplicated_keys_deprecated/duplicated_keys.stderr +++ b/src/tools/clippy/tests/ui-toml/duplicated_keys_deprecated/duplicated_keys.stderr @@ -10,5 +10,5 @@ warning: error reading Clippy's configuration file: deprecated field `cyclomatic LL | cyclomatic-complexity-threshold = 3 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -error: aborting due to previous error; 1 warning emitted +error: aborting due to 1 previous error; 1 warning emitted diff --git a/src/tools/clippy/tests/ui-toml/duplicated_keys_deprecated_2/duplicated_keys.stderr b/src/tools/clippy/tests/ui-toml/duplicated_keys_deprecated_2/duplicated_keys.stderr index a4b1e9c33..3d37e4daa 100644 --- a/src/tools/clippy/tests/ui-toml/duplicated_keys_deprecated_2/duplicated_keys.stderr +++ b/src/tools/clippy/tests/ui-toml/duplicated_keys_deprecated_2/duplicated_keys.stderr @@ -10,5 +10,5 @@ warning: error reading Clippy's configuration file: deprecated field `cyclomatic LL | cyclomatic-complexity-threshold = 3 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -error: aborting due to previous error; 1 warning emitted +error: aborting due to 1 previous error; 1 warning emitted diff --git a/src/tools/clippy/tests/ui-toml/enum_variant_size/enum_variant_size.stderr b/src/tools/clippy/tests/ui-toml/enum_variant_size/enum_variant_size.stderr index 4d9bc9d48..ca96c47b9 100644 --- a/src/tools/clippy/tests/ui-toml/enum_variant_size/enum_variant_size.stderr +++ b/src/tools/clippy/tests/ui-toml/enum_variant_size/enum_variant_size.stderr @@ -17,5 +17,5 @@ help: consider boxing the large fields to reduce the total size of the enum LL | B(Box<[u8; 501]>), | ~~~~~~~~~~~~~~ -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/excessive_nesting/excessive_nesting.rs b/src/tools/clippy/tests/ui-toml/excessive_nesting/excessive_nesting.rs index d737a832d..4375f324a 100644 --- a/src/tools/clippy/tests/ui-toml/excessive_nesting/excessive_nesting.rs +++ b/src/tools/clippy/tests/ui-toml/excessive_nesting/excessive_nesting.rs @@ -9,7 +9,7 @@ #![allow(clippy::never_loop)] #![allow(clippy::needless_if)] #![warn(clippy::excessive_nesting)] -#![allow(clippy::collapsible_if)] +#![allow(clippy::collapsible_if, clippy::blocks_in_conditions)] #[macro_use] extern crate proc_macros; diff --git a/src/tools/clippy/tests/ui-toml/fn_params_excessive_bools/test.stderr b/src/tools/clippy/tests/ui-toml/fn_params_excessive_bools/test.stderr index 717a4bbfb..ceec4ea67 100644 --- a/src/tools/clippy/tests/ui-toml/fn_params_excessive_bools/test.stderr +++ b/src/tools/clippy/tests/ui-toml/fn_params_excessive_bools/test.stderr @@ -8,5 +8,5 @@ LL | fn g(_: bool, _: bool) {} = note: `-D clippy::fn-params-excessive-bools` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::fn_params_excessive_bools)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/ifs_same_cond/ifs_same_cond.stderr b/src/tools/clippy/tests/ui-toml/ifs_same_cond/ifs_same_cond.stderr index 305e00af2..e0e77bf23 100644 --- a/src/tools/clippy/tests/ui-toml/ifs_same_cond/ifs_same_cond.stderr +++ b/src/tools/clippy/tests/ui-toml/ifs_same_cond/ifs_same_cond.stderr @@ -12,5 +12,5 @@ LL | if x.get() { = note: `-D clippy::ifs-same-cond` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::ifs_same_cond)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/impl_trait_in_params/impl_trait_in_params.stderr b/src/tools/clippy/tests/ui-toml/impl_trait_in_params/impl_trait_in_params.stderr index 80c4f5ed4..bb1244ada 100644 --- a/src/tools/clippy/tests/ui-toml/impl_trait_in_params/impl_trait_in_params.stderr +++ b/src/tools/clippy/tests/ui-toml/impl_trait_in_params/impl_trait_in_params.stderr @@ -11,5 +11,5 @@ help: add a type parameter LL | fn t<{ /* Generic name */ }: Trait>(_: impl Trait); | +++++++++++++++++++++++++++++++ -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/invalid_min_rust_version/invalid_min_rust_version.stderr b/src/tools/clippy/tests/ui-toml/invalid_min_rust_version/invalid_min_rust_version.stderr index f127c2408..a76484066 100644 --- a/src/tools/clippy/tests/ui-toml/invalid_min_rust_version/invalid_min_rust_version.stderr +++ b/src/tools/clippy/tests/ui-toml/invalid_min_rust_version/invalid_min_rust_version.stderr @@ -4,5 +4,5 @@ error: error reading Clippy's configuration file: not a valid Rust version LL | msrv = "invalid.version" | ^^^^^^^^^^^^^^^^^ -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/large_futures/large_futures.stderr b/src/tools/clippy/tests/ui-toml/large_futures/large_futures.stderr index 7a02fcdbd..23c6215f9 100644 --- a/src/tools/clippy/tests/ui-toml/large_futures/large_futures.stderr +++ b/src/tools/clippy/tests/ui-toml/large_futures/large_futures.stderr @@ -7,5 +7,5 @@ LL | should_warn().await; = note: `-D clippy::large-futures` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::large_futures)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/large_stack_frames/large_stack_frames.stderr b/src/tools/clippy/tests/ui-toml/large_stack_frames/large_stack_frames.stderr index 67ee57ab6..5adf66627 100644 --- a/src/tools/clippy/tests/ui-toml/large_stack_frames/large_stack_frames.stderr +++ b/src/tools/clippy/tests/ui-toml/large_stack_frames/large_stack_frames.stderr @@ -11,5 +11,5 @@ LL | | } = note: `-D clippy::large-stack-frames` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::large_stack_frames)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/large_types_passed_by_value/large_types_passed_by_value.stderr b/src/tools/clippy/tests/ui-toml/large_types_passed_by_value/large_types_passed_by_value.stderr index 6678a2b47..20026d358 100644 --- a/src/tools/clippy/tests/ui-toml/large_types_passed_by_value/large_types_passed_by_value.stderr +++ b/src/tools/clippy/tests/ui-toml/large_types_passed_by_value/large_types_passed_by_value.stderr @@ -7,5 +7,5 @@ LL | fn f2(_v: [u8; 513]) {} = note: `-D clippy::large-types-passed-by-value` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::large_types_passed_by_value)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/manual_let_else/manual_let_else.stderr b/src/tools/clippy/tests/ui-toml/manual_let_else/manual_let_else.stderr index 5c2c86c37..67647cc5e 100644 --- a/src/tools/clippy/tests/ui-toml/manual_let_else/manual_let_else.stderr +++ b/src/tools/clippy/tests/ui-toml/manual_let_else/manual_let_else.stderr @@ -11,5 +11,5 @@ LL | | }; = note: `-D clippy::manual-let-else` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::manual_let_else)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/max_suggested_slice_pattern_length/index_refutable_slice.stderr b/src/tools/clippy/tests/ui-toml/max_suggested_slice_pattern_length/index_refutable_slice.stderr index d319e65d0..20ffacd09 100644 --- a/src/tools/clippy/tests/ui-toml/max_suggested_slice_pattern_length/index_refutable_slice.stderr +++ b/src/tools/clippy/tests/ui-toml/max_suggested_slice_pattern_length/index_refutable_slice.stderr @@ -18,5 +18,5 @@ help: and replace the index expressions here LL | println!("{}", slice_7); | ~~~~~~~ -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/min_rust_version/min_rust_version.stderr b/src/tools/clippy/tests/ui-toml/min_rust_version/min_rust_version.stderr index 5b1f8dbd3..5bf2bcd3b 100644 --- a/src/tools/clippy/tests/ui-toml/min_rust_version/min_rust_version.stderr +++ b/src/tools/clippy/tests/ui-toml/min_rust_version/min_rust_version.stderr @@ -7,5 +7,5 @@ LL | let _: Option<u64> = Some(&16).map(|b| *b); = note: `-D clippy::map-clone` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::map_clone)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/private-doc-errors/clippy.toml b/src/tools/clippy/tests/ui-toml/private-doc-errors/clippy.toml new file mode 100644 index 000000000..8483b87c6 --- /dev/null +++ b/src/tools/clippy/tests/ui-toml/private-doc-errors/clippy.toml @@ -0,0 +1 @@ +check-private-items = true diff --git a/src/tools/clippy/tests/ui-toml/private-doc-errors/doc_lints.rs b/src/tools/clippy/tests/ui-toml/private-doc-errors/doc_lints.rs new file mode 100644 index 000000000..ae4c3f84c --- /dev/null +++ b/src/tools/clippy/tests/ui-toml/private-doc-errors/doc_lints.rs @@ -0,0 +1,54 @@ +#![deny( + clippy::unnecessary_safety_doc, + clippy::missing_errors_doc, + clippy::missing_panics_doc +)] + +/// This is a private function, skip to match behavior with `missing_safety_doc`. +/// +/// # Safety +/// +/// Boo! +fn you_dont_see_me() { + //~^ ERROR: safe function's docs have unnecessary `# Safety` section + unimplemented!(); +} + +mod private_mod { + /// This is public but unexported function. + /// + /// # Safety + /// + /// Very safe! + pub fn only_crate_wide_accessible() -> Result<(), ()> { + //~^ ERROR: safe function's docs have unnecessary `# Safety` section + //~| ERROR: docs for function returning `Result` missing `# Errors` section + unimplemented!(); + } +} + +pub struct S; + +impl S { + /// Private, fine again to stay consistent with `missing_safety_doc`. + /// + /// # Safety + /// + /// Unnecessary! + fn private(&self) { + //~^ ERROR: safe function's docs have unnecessary `# Safety` section + //~| ERROR: docs for function which may panic missing `# Panics` section + panic!(); + } +} + +#[doc(hidden)] +pub mod __macro { + pub struct T; + impl T { + pub unsafe fn f() {} + //~^ ERROR: unsafe function's docs miss `# Safety` section + } +} + +fn main() {} diff --git a/src/tools/clippy/tests/ui-toml/private-doc-errors/doc_lints.stderr b/src/tools/clippy/tests/ui-toml/private-doc-errors/doc_lints.stderr new file mode 100644 index 000000000..853367480 --- /dev/null +++ b/src/tools/clippy/tests/ui-toml/private-doc-errors/doc_lints.stderr @@ -0,0 +1,64 @@ +error: safe function's docs have unnecessary `# Safety` section + --> $DIR/doc_lints.rs:12:1 + | +LL | fn you_dont_see_me() { + | ^^^^^^^^^^^^^^^^^^^^ + | +note: the lint level is defined here + --> $DIR/doc_lints.rs:2:5 + | +LL | clippy::unnecessary_safety_doc, + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +error: safe function's docs have unnecessary `# Safety` section + --> $DIR/doc_lints.rs:23:5 + | +LL | pub fn only_crate_wide_accessible() -> Result<(), ()> { + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +error: docs for function returning `Result` missing `# Errors` section + --> $DIR/doc_lints.rs:23:5 + | +LL | pub fn only_crate_wide_accessible() -> Result<(), ()> { + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +note: the lint level is defined here + --> $DIR/doc_lints.rs:3:5 + | +LL | clippy::missing_errors_doc, + | ^^^^^^^^^^^^^^^^^^^^^^^^^^ + +error: safe function's docs have unnecessary `# Safety` section + --> $DIR/doc_lints.rs:38:5 + | +LL | fn private(&self) { + | ^^^^^^^^^^^^^^^^^ + +error: docs for function which may panic missing `# Panics` section + --> $DIR/doc_lints.rs:38:5 + | +LL | fn private(&self) { + | ^^^^^^^^^^^^^^^^^ + | +note: first possible panic found here + --> $DIR/doc_lints.rs:41:9 + | +LL | panic!(); + | ^^^^^^^^ +note: the lint level is defined here + --> $DIR/doc_lints.rs:4:5 + | +LL | clippy::missing_panics_doc + | ^^^^^^^^^^^^^^^^^^^^^^^^^^ + +error: unsafe function's docs miss `# Safety` section + --> $DIR/doc_lints.rs:49:9 + | +LL | pub unsafe fn f() {} + | ^^^^^^^^^^^^^^^^^ + | + = note: `-D clippy::missing-safety-doc` implied by `-D warnings` + = help: to override `-D warnings` add `#[allow(clippy::missing_safety_doc)]` + +error: aborting due to 6 previous errors + diff --git a/src/tools/clippy/tests/ui-toml/result_large_err/result_large_err.stderr b/src/tools/clippy/tests/ui-toml/result_large_err/result_large_err.stderr index b0936319d..cc603fc0c 100644 --- a/src/tools/clippy/tests/ui-toml/result_large_err/result_large_err.stderr +++ b/src/tools/clippy/tests/ui-toml/result_large_err/result_large_err.stderr @@ -8,5 +8,5 @@ LL | fn f2() -> Result<(), [u8; 512]> { = note: `-D clippy::result-large-err` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::result_large_err)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/semicolon_block/semicolon_inside_block.stderr b/src/tools/clippy/tests/ui-toml/semicolon_block/semicolon_inside_block.stderr index ce03d7d75..0542e139b 100644 --- a/src/tools/clippy/tests/ui-toml/semicolon_block/semicolon_inside_block.stderr +++ b/src/tools/clippy/tests/ui-toml/semicolon_block/semicolon_inside_block.stderr @@ -15,5 +15,5 @@ LL ~ unit_fn_block(); LL ~ } | -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/struct_excessive_bools/test.stderr b/src/tools/clippy/tests/ui-toml/struct_excessive_bools/test.stderr index 9237c9c9d..31e0e33a3 100644 --- a/src/tools/clippy/tests/ui-toml/struct_excessive_bools/test.stderr +++ b/src/tools/clippy/tests/ui-toml/struct_excessive_bools/test.stderr @@ -10,5 +10,5 @@ LL | | } = note: `-D clippy::struct-excessive-bools` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::struct_excessive_bools)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/toml_unknown_key/conf_unknown_key.stderr b/src/tools/clippy/tests/ui-toml/toml_unknown_key/conf_unknown_key.stderr index 2f9eaa517..12828cf9d 100644 --- a/src/tools/clippy/tests/ui-toml/toml_unknown_key/conf_unknown_key.stderr +++ b/src/tools/clippy/tests/ui-toml/toml_unknown_key/conf_unknown_key.stderr @@ -21,6 +21,7 @@ error: error reading Clippy's configuration file: unknown field `foobar`, expect await-holding-invalid-types blacklisted-names cargo-ignore-publish + check-private-items cognitive-complexity-threshold cyclomatic-complexity-threshold disallowed-macros @@ -95,6 +96,7 @@ error: error reading Clippy's configuration file: unknown field `barfoo`, expect await-holding-invalid-types blacklisted-names cargo-ignore-publish + check-private-items cognitive-complexity-threshold cyclomatic-complexity-threshold disallowed-macros diff --git a/src/tools/clippy/tests/ui-toml/too_large_for_stack/boxed_local.stderr b/src/tools/clippy/tests/ui-toml/too_large_for_stack/boxed_local.stderr index 2859a29f1..54990c352 100644 --- a/src/tools/clippy/tests/ui-toml/too_large_for_stack/boxed_local.stderr +++ b/src/tools/clippy/tests/ui-toml/too_large_for_stack/boxed_local.stderr @@ -7,5 +7,5 @@ LL | fn f(x: Box<[u8; 500]>) {} = note: `-D clippy::boxed-local` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::boxed_local)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/too_large_for_stack/useless_vec.stderr b/src/tools/clippy/tests/ui-toml/too_large_for_stack/useless_vec.stderr index 923cded5e..5d289db85 100644 --- a/src/tools/clippy/tests/ui-toml/too_large_for_stack/useless_vec.stderr +++ b/src/tools/clippy/tests/ui-toml/too_large_for_stack/useless_vec.stderr @@ -7,5 +7,5 @@ LL | let x = vec![0u8; 500]; = note: `-D clippy::useless-vec` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::useless_vec)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/too_many_arguments/too_many_arguments.stderr b/src/tools/clippy/tests/ui-toml/too_many_arguments/too_many_arguments.stderr index 8b9d159b5..81d9bee73 100644 --- a/src/tools/clippy/tests/ui-toml/too_many_arguments/too_many_arguments.stderr +++ b/src/tools/clippy/tests/ui-toml/too_many_arguments/too_many_arguments.stderr @@ -7,5 +7,5 @@ LL | fn too_many(p1: u8, p2: u8, p3: u8, p4: u8, p5: u8, p6: u8, p7: u8, p8: u8, = note: `-D clippy::too-many-arguments` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::too_many_arguments)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/type_complexity/type_complexity.stderr b/src/tools/clippy/tests/ui-toml/type_complexity/type_complexity.stderr index 8ca637f72..df824400d 100644 --- a/src/tools/clippy/tests/ui-toml/type_complexity/type_complexity.stderr +++ b/src/tools/clippy/tests/ui-toml/type_complexity/type_complexity.stderr @@ -7,5 +7,5 @@ LL | fn f2(_: (u8, (u8, (u8, (u8, (u8, (u8, u8))))))) {} = note: `-D clippy::type-complexity` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::type_complexity)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/type_repetition_in_bounds/main.stderr b/src/tools/clippy/tests/ui-toml/type_repetition_in_bounds/main.stderr index 2ae298497..444fbd128 100644 --- a/src/tools/clippy/tests/ui-toml/type_repetition_in_bounds/main.stderr +++ b/src/tools/clippy/tests/ui-toml/type_repetition_in_bounds/main.stderr @@ -8,5 +8,5 @@ LL | T: Unpin + PartialEq, = note: `-D clippy::type-repetition-in-bounds` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::type_repetition_in_bounds)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/unnecessary_box_returns/unnecessary_box_returns.stderr b/src/tools/clippy/tests/ui-toml/unnecessary_box_returns/unnecessary_box_returns.stderr index df9aa37ac..9a747a19f 100644 --- a/src/tools/clippy/tests/ui-toml/unnecessary_box_returns/unnecessary_box_returns.stderr +++ b/src/tools/clippy/tests/ui-toml/unnecessary_box_returns/unnecessary_box_returns.stderr @@ -8,5 +8,5 @@ LL | fn f() -> Box<[u8; 64]> { = note: `-D clippy::unnecessary-box-returns` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::unnecessary_box_returns)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/verbose_bit_mask/verbose_bit_mask.stderr b/src/tools/clippy/tests/ui-toml/verbose_bit_mask/verbose_bit_mask.stderr index 7377921b4..5fcc63131 100644 --- a/src/tools/clippy/tests/ui-toml/verbose_bit_mask/verbose_bit_mask.stderr +++ b/src/tools/clippy/tests/ui-toml/verbose_bit_mask/verbose_bit_mask.stderr @@ -7,5 +7,5 @@ LL | let _ = v & 0b111111 == 0; = note: `-D clippy::verbose-bit-mask` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::verbose_bit_mask)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui-toml/wildcard_imports/wildcard_imports.stderr b/src/tools/clippy/tests/ui-toml/wildcard_imports/wildcard_imports.stderr index 13ec3a229..f11fda6a0 100644 --- a/src/tools/clippy/tests/ui-toml/wildcard_imports/wildcard_imports.stderr +++ b/src/tools/clippy/tests/ui-toml/wildcard_imports/wildcard_imports.stderr @@ -7,5 +7,5 @@ LL | use prelude::*; = note: `-D clippy::wildcard-imports` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::wildcard_imports)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/arc_with_non_send_sync.rs b/src/tools/clippy/tests/ui/arc_with_non_send_sync.rs index d03a577c4..349e81912 100644 --- a/src/tools/clippy/tests/ui/arc_with_non_send_sync.rs +++ b/src/tools/clippy/tests/ui/arc_with_non_send_sync.rs @@ -33,16 +33,16 @@ fn main() { let _ = Arc::new(42); let _ = Arc::new(RefCell::new(42)); - //~^ ERROR: usage of an `Arc` that is not `Send` or `Sync` + //~^ ERROR: usage of an `Arc` that is not `Send` and `Sync` //~| NOTE: the trait `Sync` is not implemented for `RefCell<i32>` let mutex = Mutex::new(1); let _ = Arc::new(mutex.lock().unwrap()); - //~^ ERROR: usage of an `Arc` that is not `Send` or `Sync` + //~^ ERROR: usage of an `Arc` that is not `Send` and `Sync` //~| NOTE: the trait `Send` is not implemented for `MutexGuard<'_, i32>` let _ = Arc::new(&42 as *const i32); - //~^ ERROR: usage of an `Arc` that is not `Send` or `Sync` + //~^ ERROR: usage of an `Arc` that is not `Send` and `Sync` //~| NOTE: the trait `Send` is not implemented for `*const i32` //~| NOTE: the trait `Sync` is not implemented for `*const i32` } diff --git a/src/tools/clippy/tests/ui/arc_with_non_send_sync.stderr b/src/tools/clippy/tests/ui/arc_with_non_send_sync.stderr index fd239580d..a7f91abda 100644 --- a/src/tools/clippy/tests/ui/arc_with_non_send_sync.stderr +++ b/src/tools/clippy/tests/ui/arc_with_non_send_sync.stderr @@ -1,35 +1,41 @@ -error: usage of an `Arc` that is not `Send` or `Sync` +error: usage of an `Arc` that is not `Send` and `Sync` --> $DIR/arc_with_non_send_sync.rs:35:13 | LL | let _ = Arc::new(RefCell::new(42)); | ^^^^^^^^^^^^^^^^^^^^^^^^^^ | - = note: the trait `Sync` is not implemented for `RefCell<i32>` - = note: required for `Arc<RefCell<i32>>` to implement `Send` and `Sync` - = help: consider using an `Rc` instead or wrapping the inner type with a `Mutex` + = note: `Arc<RefCell<i32>>` is not `Send` and `Sync` as: + = note: - the trait `Sync` is not implemented for `RefCell<i32>` + = help: consider using an `Rc` instead. `Arc` does not provide benefits for non `Send` and `Sync` types + = note: if you intend to use `Arc` with `Send` and `Sync` traits + = note: wrap the inner type with a `Mutex` or implement `Send` and `Sync` for `RefCell<i32>` = note: `-D clippy::arc-with-non-send-sync` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::arc_with_non_send_sync)]` -error: usage of an `Arc` that is not `Send` or `Sync` +error: usage of an `Arc` that is not `Send` and `Sync` --> $DIR/arc_with_non_send_sync.rs:40:13 | LL | let _ = Arc::new(mutex.lock().unwrap()); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | - = note: the trait `Send` is not implemented for `MutexGuard<'_, i32>` - = note: required for `Arc<MutexGuard<'_, i32>>` to implement `Send` and `Sync` - = help: consider using an `Rc` instead or wrapping the inner type with a `Mutex` + = note: `Arc<MutexGuard<'_, i32>>` is not `Send` and `Sync` as: + = note: - the trait `Send` is not implemented for `MutexGuard<'_, i32>` + = help: consider using an `Rc` instead. `Arc` does not provide benefits for non `Send` and `Sync` types + = note: if you intend to use `Arc` with `Send` and `Sync` traits + = note: wrap the inner type with a `Mutex` or implement `Send` and `Sync` for `MutexGuard<'_, i32>` -error: usage of an `Arc` that is not `Send` or `Sync` +error: usage of an `Arc` that is not `Send` and `Sync` --> $DIR/arc_with_non_send_sync.rs:44:13 | LL | let _ = Arc::new(&42 as *const i32); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ | - = note: the trait `Send` is not implemented for `*const i32` - = note: the trait `Sync` is not implemented for `*const i32` - = note: required for `Arc<*const i32>` to implement `Send` and `Sync` - = help: consider using an `Rc` instead or wrapping the inner type with a `Mutex` + = note: `Arc<*const i32>` is not `Send` and `Sync` as: + = note: - the trait `Send` is not implemented for `*const i32` + = note: - the trait `Sync` is not implemented for `*const i32` + = help: consider using an `Rc` instead. `Arc` does not provide benefits for non `Send` and `Sync` types + = note: if you intend to use `Arc` with `Send` and `Sync` traits + = note: wrap the inner type with a `Mutex` or implement `Send` and `Sync` for `*const i32` error: aborting due to 3 previous errors diff --git a/src/tools/clippy/tests/ui/attrs.rs b/src/tools/clippy/tests/ui/attrs.rs index 05ee48d17..da96eabed 100644 --- a/src/tools/clippy/tests/ui/attrs.rs +++ b/src/tools/clippy/tests/ui/attrs.rs @@ -36,6 +36,9 @@ pub const ANOTHER_CONST: u8 = 23; #[deprecated(since = "0.1.1")] pub const YET_ANOTHER_CONST: u8 = 0; +#[deprecated(since = "TBD")] +pub const GONNA_DEPRECATE_THIS_LATER: u8 = 0; + fn main() { test_attr_lint(); if false { diff --git a/src/tools/clippy/tests/ui/bind_instead_of_map_multipart.fixed b/src/tools/clippy/tests/ui/bind_instead_of_map_multipart.fixed index 8cbadc67d..8c77039b3 100644 --- a/src/tools/clippy/tests/ui/bind_instead_of_map_multipart.fixed +++ b/src/tools/clippy/tests/ui/bind_instead_of_map_multipart.fixed @@ -1,5 +1,5 @@ #![deny(clippy::bind_instead_of_map)] -#![allow(clippy::blocks_in_if_conditions)] +#![allow(clippy::blocks_in_conditions)] pub fn main() { let _ = Some("42").map(|s| if s.len() < 42 { 0 } else { s.len() }); diff --git a/src/tools/clippy/tests/ui/bind_instead_of_map_multipart.rs b/src/tools/clippy/tests/ui/bind_instead_of_map_multipart.rs index 91d9d11e3..44257f3a4 100644 --- a/src/tools/clippy/tests/ui/bind_instead_of_map_multipart.rs +++ b/src/tools/clippy/tests/ui/bind_instead_of_map_multipart.rs @@ -1,5 +1,5 @@ #![deny(clippy::bind_instead_of_map)] -#![allow(clippy::blocks_in_if_conditions)] +#![allow(clippy::blocks_in_conditions)] pub fn main() { let _ = Some("42").and_then(|s| if s.len() < 42 { Some(0) } else { Some(s.len()) }); diff --git a/src/tools/clippy/tests/ui/blocks_in_if_conditions.fixed b/src/tools/clippy/tests/ui/blocks_in_conditions.fixed index f89c46504..2ab441bbd 100644 --- a/src/tools/clippy/tests/ui/blocks_in_if_conditions.fixed +++ b/src/tools/clippy/tests/ui/blocks_in_conditions.fixed @@ -1,4 +1,4 @@ -#![warn(clippy::blocks_in_if_conditions)] +#![warn(clippy::blocks_in_conditions)] #![allow(unused, clippy::let_and_return, clippy::needless_if)] #![warn(clippy::nonminimal_bool)] @@ -21,6 +21,7 @@ fn macro_if() { fn condition_has_block() -> i32 { let res = { + //~^ ERROR: in an `if` condition, avoid complex blocks or closures with blocks; instead, move the block or closure higher and bind it with a `let` let x = 3; x == 3 }; if res { @@ -32,6 +33,7 @@ fn condition_has_block() -> i32 { fn condition_has_block_with_single_expression() -> i32 { if true { 6 } else { 10 } + //~^ ERROR: omit braces around single expression condition } fn condition_is_normal() -> i32 { @@ -61,4 +63,26 @@ fn block_in_assert() { ); } +// issue #11814 +fn block_in_match_expr(num: i32) -> i32 { + let res = { + //~^ ERROR: in a `match` scrutinee, avoid complex blocks or closures with blocks; instead, move the block or closure higher and bind it with a `let` + let opt = Some(2); + opt + }; match res { + Some(0) => 1, + Some(n) => num * 2, + None => 0, + }; + + match unsafe { + let hearty_hearty_hearty = vec![240, 159, 146, 150]; + String::from_utf8_unchecked(hearty_hearty_hearty).as_str() + } { + "💖" => 1, + "what" => 2, + _ => 3, + } +} + fn main() {} diff --git a/src/tools/clippy/tests/ui/blocks_in_if_conditions.rs b/src/tools/clippy/tests/ui/blocks_in_conditions.rs index 34febc5fa..dd5ae4fb4 100644 --- a/src/tools/clippy/tests/ui/blocks_in_if_conditions.rs +++ b/src/tools/clippy/tests/ui/blocks_in_conditions.rs @@ -1,4 +1,4 @@ -#![warn(clippy::blocks_in_if_conditions)] +#![warn(clippy::blocks_in_conditions)] #![allow(unused, clippy::let_and_return, clippy::needless_if)] #![warn(clippy::nonminimal_bool)] @@ -21,6 +21,7 @@ fn macro_if() { fn condition_has_block() -> i32 { if { + //~^ ERROR: in an `if` condition, avoid complex blocks or closures with blocks; instead, move the block or closure higher and bind it with a `let` let x = 3; x == 3 } { @@ -32,6 +33,7 @@ fn condition_has_block() -> i32 { fn condition_has_block_with_single_expression() -> i32 { if { true } { 6 } else { 10 } + //~^ ERROR: omit braces around single expression condition } fn condition_is_normal() -> i32 { @@ -61,4 +63,26 @@ fn block_in_assert() { ); } +// issue #11814 +fn block_in_match_expr(num: i32) -> i32 { + match { + //~^ ERROR: in a `match` scrutinee, avoid complex blocks or closures with blocks; instead, move the block or closure higher and bind it with a `let` + let opt = Some(2); + opt + } { + Some(0) => 1, + Some(n) => num * 2, + None => 0, + }; + + match unsafe { + let hearty_hearty_hearty = vec![240, 159, 146, 150]; + String::from_utf8_unchecked(hearty_hearty_hearty).as_str() + } { + "💖" => 1, + "what" => 2, + _ => 3, + } +} + fn main() {} diff --git a/src/tools/clippy/tests/ui/blocks_in_if_conditions.stderr b/src/tools/clippy/tests/ui/blocks_in_conditions.stderr index d80ef9c0f..b00fe2f63 100644 --- a/src/tools/clippy/tests/ui/blocks_in_if_conditions.stderr +++ b/src/tools/clippy/tests/ui/blocks_in_conditions.stderr @@ -1,30 +1,32 @@ error: in an `if` condition, avoid complex blocks or closures with blocks; instead, move the block or closure higher and bind it with a `let` - --> $DIR/blocks_in_if_conditions.rs:23:5 + --> $DIR/blocks_in_conditions.rs:23:5 | LL | / if { +LL | | LL | | let x = 3; LL | | x == 3 LL | | } { | |_____^ | - = note: `-D clippy::blocks-in-if-conditions` implied by `-D warnings` - = help: to override `-D warnings` add `#[allow(clippy::blocks_in_if_conditions)]` + = note: `-D clippy::blocks-in-conditions` implied by `-D warnings` + = help: to override `-D warnings` add `#[allow(clippy::blocks_in_conditions)]` help: try | LL ~ let res = { +LL + LL + let x = 3; LL + x == 3 LL ~ }; if res { | error: omit braces around single expression condition - --> $DIR/blocks_in_if_conditions.rs:34:8 + --> $DIR/blocks_in_conditions.rs:35:8 | LL | if { true } { 6 } else { 10 } | ^^^^^^^^ help: try: `true` error: this boolean expression can be simplified - --> $DIR/blocks_in_if_conditions.rs:39:8 + --> $DIR/blocks_in_conditions.rs:41:8 | LL | if true && x == 3 { 6 } else { 10 } | ^^^^^^^^^^^^^^ help: try: `x == 3` @@ -32,5 +34,24 @@ LL | if true && x == 3 { 6 } else { 10 } = note: `-D clippy::nonminimal-bool` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::nonminimal_bool)]` -error: aborting due to 3 previous errors +error: in a `match` scrutinee, avoid complex blocks or closures with blocks; instead, move the block or closure higher and bind it with a `let` + --> $DIR/blocks_in_conditions.rs:68:5 + | +LL | / match { +LL | | +LL | | let opt = Some(2); +LL | | opt +LL | | } { + | |_____^ + | +help: try + | +LL ~ let res = { +LL + +LL + let opt = Some(2); +LL + opt +LL ~ }; match res { + | + +error: aborting due to 4 previous errors diff --git a/src/tools/clippy/tests/ui/blocks_in_if_conditions_closure.rs b/src/tools/clippy/tests/ui/blocks_in_conditions_closure.rs index 539f2df15..db31e4ae1 100644 --- a/src/tools/clippy/tests/ui/blocks_in_if_conditions_closure.rs +++ b/src/tools/clippy/tests/ui/blocks_in_conditions_closure.rs @@ -1,4 +1,4 @@ -#![warn(clippy::blocks_in_if_conditions)] +#![warn(clippy::blocks_in_conditions)] #![allow( unused, clippy::let_and_return, @@ -22,7 +22,7 @@ fn pred_test() { && predicate( |x| { //~^ ERROR: in an `if` condition, avoid complex blocks or closures with blocks - //~| NOTE: `-D clippy::blocks-in-if-conditions` implied by `-D warnings` + //~| NOTE: `-D clippy::blocks-in-conditions` implied by `-D warnings` let target = 3; x == target }, @@ -60,6 +60,23 @@ fn function_with_empty_closure() { if closure(|| {}) {} } +// issue #11814 +fn match_with_pred() { + let v = 3; + match Some(predicate( + |x| { + //~^ ERROR: in a `match` scrutinee, avoid complex blocks or closures with blocks + let target = 3; + x == target + }, + v, + )) { + Some(true) => 1, + Some(false) => 2, + None => 3, + }; +} + #[rustfmt::skip] fn main() { let mut range = 0..10; diff --git a/src/tools/clippy/tests/ui/blocks_in_if_conditions_closure.stderr b/src/tools/clippy/tests/ui/blocks_in_conditions_closure.stderr index ab68997d4..08b98f1b4 100644 --- a/src/tools/clippy/tests/ui/blocks_in_if_conditions_closure.stderr +++ b/src/tools/clippy/tests/ui/blocks_in_conditions_closure.stderr @@ -1,5 +1,5 @@ error: in an `if` condition, avoid complex blocks or closures with blocks; instead, move the block or closure higher and bind it with a `let` - --> $DIR/blocks_in_if_conditions_closure.rs:23:17 + --> $DIR/blocks_in_conditions_closure.rs:23:17 | LL | |x| { | _________________^ @@ -10,11 +10,11 @@ LL | | x == target LL | | }, | |_____________^ | - = note: `-D clippy::blocks-in-if-conditions` implied by `-D warnings` - = help: to override `-D warnings` add `#[allow(clippy::blocks_in_if_conditions)]` + = note: `-D clippy::blocks-in-conditions` implied by `-D warnings` + = help: to override `-D warnings` add `#[allow(clippy::blocks_in_conditions)]` error: in an `if` condition, avoid complex blocks or closures with blocks; instead, move the block or closure higher and bind it with a `let` - --> $DIR/blocks_in_if_conditions_closure.rs:34:13 + --> $DIR/blocks_in_conditions_closure.rs:34:13 | LL | |x| { | _____________^ @@ -24,5 +24,16 @@ LL | | x == target LL | | }, | |_________^ -error: aborting due to 2 previous errors +error: in a `match` scrutinee, avoid complex blocks or closures with blocks; instead, move the block or closure higher and bind it with a `let` + --> $DIR/blocks_in_conditions_closure.rs:67:13 + | +LL | |x| { + | _____________^ +LL | | +LL | | let target = 3; +LL | | x == target +LL | | }, + | |_________^ + +error: aborting due to 3 previous errors diff --git a/src/tools/clippy/tests/ui/borrow_deref_ref_unfixable.stderr b/src/tools/clippy/tests/ui/borrow_deref_ref_unfixable.stderr index 2a21f5ca2..296af6436 100644 --- a/src/tools/clippy/tests/ui/borrow_deref_ref_unfixable.stderr +++ b/src/tools/clippy/tests/ui/borrow_deref_ref_unfixable.stderr @@ -15,5 +15,5 @@ help: if you would like to deref, try using `&**` LL | let x: &str = &**s; | ~~~~ -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/box_default.fixed b/src/tools/clippy/tests/ui/box_default.fixed index 69cabcb32..48408e191 100644 --- a/src/tools/clippy/tests/ui/box_default.fixed +++ b/src/tools/clippy/tests/ui/box_default.fixed @@ -90,3 +90,17 @@ fn issue_10381() { assert!(maybe_get_bar(2).is_some()); } + +#[allow(unused)] +fn issue_11868() { + fn foo(_: &mut Vec<usize>) {} + + macro_rules! bar { + ($baz:expr) => { + Box::leak(Box::new($baz)) + }; + } + + foo(bar!(vec![])); + foo(bar!(vec![1])); +} diff --git a/src/tools/clippy/tests/ui/box_default.rs b/src/tools/clippy/tests/ui/box_default.rs index 48fa8bc33..58b912707 100644 --- a/src/tools/clippy/tests/ui/box_default.rs +++ b/src/tools/clippy/tests/ui/box_default.rs @@ -90,3 +90,17 @@ fn issue_10381() { assert!(maybe_get_bar(2).is_some()); } + +#[allow(unused)] +fn issue_11868() { + fn foo(_: &mut Vec<usize>) {} + + macro_rules! bar { + ($baz:expr) => { + Box::leak(Box::new($baz)) + }; + } + + foo(bar!(vec![])); + foo(bar!(vec![1])); +} diff --git a/src/tools/clippy/tests/ui/cfg_features.fixed b/src/tools/clippy/tests/ui/cfg_features.fixed index 3d52f2382..0fe38f169 100644 --- a/src/tools/clippy/tests/ui/cfg_features.fixed +++ b/src/tools/clippy/tests/ui/cfg_features.fixed @@ -2,16 +2,28 @@ fn main() { #[cfg(feature = "not-really-a-feature")] - //~^ ERROR: feature may misspelled as features + //~^ ERROR: 'feature' may be misspelled as 'features' //~| NOTE: `-D clippy::maybe-misused-cfg` implied by `-D warnings` let _ = 1 + 2; #[cfg(all(feature = "right", feature = "wrong"))] - //~^ ERROR: feature may misspelled as features + //~^ ERROR: 'feature' may be misspelled as 'features' let _ = 1 + 2; #[cfg(all(feature = "wrong1", any(feature = "right", feature = "wrong2", feature, features)))] - //~^ ERROR: feature may misspelled as features - //~| ERROR: feature may misspelled as features + //~^ ERROR: 'feature' may be misspelled as 'features' + //~| ERROR: 'feature' may be misspelled as 'features' let _ = 1 + 2; + + #[cfg(test)] + //~^ ERROR: 'test' may be misspelled as 'tests' + let _ = 2; + #[cfg(test)] + //~^ ERROR: 'test' may be misspelled as 'Test' + let _ = 2; + + #[cfg(all(test, test))] + //~^ ERROR: 'test' may be misspelled as 'tests' + //~| ERROR: 'test' may be misspelled as 'Test' + let _ = 2; } diff --git a/src/tools/clippy/tests/ui/cfg_features.rs b/src/tools/clippy/tests/ui/cfg_features.rs index a0344a004..9c0db035e 100644 --- a/src/tools/clippy/tests/ui/cfg_features.rs +++ b/src/tools/clippy/tests/ui/cfg_features.rs @@ -2,16 +2,28 @@ fn main() { #[cfg(features = "not-really-a-feature")] - //~^ ERROR: feature may misspelled as features + //~^ ERROR: 'feature' may be misspelled as 'features' //~| NOTE: `-D clippy::maybe-misused-cfg` implied by `-D warnings` let _ = 1 + 2; #[cfg(all(feature = "right", features = "wrong"))] - //~^ ERROR: feature may misspelled as features + //~^ ERROR: 'feature' may be misspelled as 'features' let _ = 1 + 2; #[cfg(all(features = "wrong1", any(feature = "right", features = "wrong2", feature, features)))] - //~^ ERROR: feature may misspelled as features - //~| ERROR: feature may misspelled as features + //~^ ERROR: 'feature' may be misspelled as 'features' + //~| ERROR: 'feature' may be misspelled as 'features' let _ = 1 + 2; + + #[cfg(tests)] + //~^ ERROR: 'test' may be misspelled as 'tests' + let _ = 2; + #[cfg(Test)] + //~^ ERROR: 'test' may be misspelled as 'Test' + let _ = 2; + + #[cfg(all(tests, Test))] + //~^ ERROR: 'test' may be misspelled as 'tests' + //~| ERROR: 'test' may be misspelled as 'Test' + let _ = 2; } diff --git a/src/tools/clippy/tests/ui/cfg_features.stderr b/src/tools/clippy/tests/ui/cfg_features.stderr index 401c3e92e..e1593e207 100644 --- a/src/tools/clippy/tests/ui/cfg_features.stderr +++ b/src/tools/clippy/tests/ui/cfg_features.stderr @@ -1,29 +1,53 @@ -error: feature may misspelled as features +error: 'feature' may be misspelled as 'features' --> $DIR/cfg_features.rs:4:11 | LL | #[cfg(features = "not-really-a-feature")] - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `feature = "not-really-a-feature"` + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: did you mean: `feature = "not-really-a-feature"` | = note: `-D clippy::maybe-misused-cfg` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::maybe_misused_cfg)]` -error: feature may misspelled as features +error: 'feature' may be misspelled as 'features' --> $DIR/cfg_features.rs:9:34 | LL | #[cfg(all(feature = "right", features = "wrong"))] - | ^^^^^^^^^^^^^^^^^^ help: use: `feature = "wrong"` + | ^^^^^^^^^^^^^^^^^^ help: did you mean: `feature = "wrong"` -error: feature may misspelled as features +error: 'feature' may be misspelled as 'features' --> $DIR/cfg_features.rs:13:15 | LL | #[cfg(all(features = "wrong1", any(feature = "right", features = "wrong2", feature, features)))] - | ^^^^^^^^^^^^^^^^^^^ help: use: `feature = "wrong1"` + | ^^^^^^^^^^^^^^^^^^^ help: did you mean: `feature = "wrong1"` -error: feature may misspelled as features +error: 'feature' may be misspelled as 'features' --> $DIR/cfg_features.rs:13:59 | LL | #[cfg(all(features = "wrong1", any(feature = "right", features = "wrong2", feature, features)))] - | ^^^^^^^^^^^^^^^^^^^ help: use: `feature = "wrong2"` + | ^^^^^^^^^^^^^^^^^^^ help: did you mean: `feature = "wrong2"` -error: aborting due to 4 previous errors +error: 'test' may be misspelled as 'tests' + --> $DIR/cfg_features.rs:18:11 + | +LL | #[cfg(tests)] + | ^^^^^ help: did you mean: `test` + +error: 'test' may be misspelled as 'Test' + --> $DIR/cfg_features.rs:21:11 + | +LL | #[cfg(Test)] + | ^^^^ help: did you mean: `test` + +error: 'test' may be misspelled as 'tests' + --> $DIR/cfg_features.rs:25:15 + | +LL | #[cfg(all(tests, Test))] + | ^^^^^ help: did you mean: `test` + +error: 'test' may be misspelled as 'Test' + --> $DIR/cfg_features.rs:25:22 + | +LL | #[cfg(all(tests, Test))] + | ^^^^ help: did you mean: `test` + +error: aborting due to 8 previous errors diff --git a/src/tools/clippy/tests/ui/char_lit_as_u8.stderr b/src/tools/clippy/tests/ui/char_lit_as_u8.stderr index ce1f2f829..22774d2f9 100644 --- a/src/tools/clippy/tests/ui/char_lit_as_u8.stderr +++ b/src/tools/clippy/tests/ui/char_lit_as_u8.stderr @@ -8,5 +8,5 @@ LL | let _ = '❤' as u8; = note: `-D clippy::char-lit-as-u8` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::char_lit_as_u8)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/cognitive_complexity_attr_used.stderr b/src/tools/clippy/tests/ui/cognitive_complexity_attr_used.stderr index 9cd25f6fd..b9af72371 100644 --- a/src/tools/clippy/tests/ui/cognitive_complexity_attr_used.stderr +++ b/src/tools/clippy/tests/ui/cognitive_complexity_attr_used.stderr @@ -8,5 +8,5 @@ LL | fn kaboom() { = note: `-D clippy::cognitive-complexity` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::cognitive_complexity)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/copy_iterator.stderr b/src/tools/clippy/tests/ui/copy_iterator.stderr index 48c3385b6..30535db50 100644 --- a/src/tools/clippy/tests/ui/copy_iterator.stderr +++ b/src/tools/clippy/tests/ui/copy_iterator.stderr @@ -14,5 +14,5 @@ LL | | } = note: `-D clippy::copy-iterator` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::copy_iterator)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/crashes/ice-10148.stderr b/src/tools/clippy/tests/ui/crashes/ice-10148.stderr index 4d436e3aa..ece3e1c39 100644 --- a/src/tools/clippy/tests/ui/crashes/ice-10148.stderr +++ b/src/tools/clippy/tests/ui/crashes/ice-10148.stderr @@ -9,5 +9,5 @@ LL | println!(with_span!(""something "")); = note: `-D clippy::println-empty-string` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::println_empty_string)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/crashes/ice-11422.stderr b/src/tools/clippy/tests/ui/crashes/ice-11422.stderr index fb80b5b14..b3dcc00f3 100644 --- a/src/tools/clippy/tests/ui/crashes/ice-11422.stderr +++ b/src/tools/clippy/tests/ui/crashes/ice-11422.stderr @@ -12,5 +12,5 @@ LL - fn gen() -> impl PartialOrd + PartialEq + Debug {} LL + fn gen() -> impl PartialOrd + Debug {} | -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/crashes/ice-11803.rs b/src/tools/clippy/tests/ui/crashes/ice-11803.rs new file mode 100644 index 000000000..1bb8bf0c7 --- /dev/null +++ b/src/tools/clippy/tests/ui/crashes/ice-11803.rs @@ -0,0 +1,9 @@ +//@no-rustfix + +#![warn(clippy::impl_trait_in_params)] + +pub fn g<T: IntoIterator<Item = impl Iterator<Item = impl Clone>>>() { + extern "C" fn implementation_detail() {} +} + +fn main() {} diff --git a/src/tools/clippy/tests/ui/crashes/ice-11803.stderr b/src/tools/clippy/tests/ui/crashes/ice-11803.stderr new file mode 100644 index 000000000..b8289048a --- /dev/null +++ b/src/tools/clippy/tests/ui/crashes/ice-11803.stderr @@ -0,0 +1,26 @@ +error: `impl Trait` used as a function parameter + --> $DIR/ice-11803.rs:5:54 + | +LL | pub fn g<T: IntoIterator<Item = impl Iterator<Item = impl Clone>>>() { + | ^^^^^^^^^^ + | + = note: `-D clippy::impl-trait-in-params` implied by `-D warnings` + = help: to override `-D warnings` add `#[allow(clippy::impl_trait_in_params)]` +help: add a type parameter + | +LL | pub fn g<T: IntoIterator<Item = impl Iterator<Item = impl Clone>>, { /* Generic name */ }: Clone>() { + | +++++++++++++++++++++++++++++++ + +error: `impl Trait` used as a function parameter + --> $DIR/ice-11803.rs:5:33 + | +LL | pub fn g<T: IntoIterator<Item = impl Iterator<Item = impl Clone>>>() { + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: add a type parameter + | +LL | pub fn g<T: IntoIterator<Item = impl Iterator<Item = impl Clone>>, { /* Generic name */ }: Iterator<Item = impl Clone>>() { + | +++++++++++++++++++++++++++++++++++++++++++++++++++++ + +error: aborting due to 2 previous errors + diff --git a/src/tools/clippy/tests/ui/crashes/ice-2774.stderr b/src/tools/clippy/tests/ui/crashes/ice-2774.stderr index ae9610c9a..188a59850 100644 --- a/src/tools/clippy/tests/ui/crashes/ice-2774.stderr +++ b/src/tools/clippy/tests/ui/crashes/ice-2774.stderr @@ -12,5 +12,5 @@ LL - pub fn add_barfoos_to_foos<'a>(bars: &HashSet<&'a Bar>) { LL + pub fn add_barfoos_to_foos(bars: &HashSet<&Bar>) { | -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/crashes/ice-3717.stderr b/src/tools/clippy/tests/ui/crashes/ice-3717.stderr index 4d3d617b6..863608fca 100644 --- a/src/tools/clippy/tests/ui/crashes/ice-3717.stderr +++ b/src/tools/clippy/tests/ui/crashes/ice-3717.stderr @@ -18,5 +18,5 @@ help: ...and use generic constructor LL | let _: HashSet<usize> = HashSet::default(); | ~~~~~~~~~~~~~~~~~~ -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/crashes/ice-3891.stderr b/src/tools/clippy/tests/ui/crashes/ice-3891.stderr index 59469ec58..5358734fe 100644 --- a/src/tools/clippy/tests/ui/crashes/ice-3891.stderr +++ b/src/tools/clippy/tests/ui/crashes/ice-3891.stderr @@ -6,5 +6,5 @@ LL | 1x; | = help: the suffix must be one of the numeric types (`u32`, `isize`, `f32`, etc.) -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/crashes/ice-5497.stderr b/src/tools/clippy/tests/ui/crashes/ice-5497.stderr index e75e7dc91..ee69f3379 100644 --- a/src/tools/clippy/tests/ui/crashes/ice-5497.stderr +++ b/src/tools/clippy/tests/ui/crashes/ice-5497.stderr @@ -6,5 +6,5 @@ LL | const OOB: i32 = [1][1] + T::OOB; | = note: `#[deny(unconditional_panic)]` on by default -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/crashes/ice-5835.stderr b/src/tools/clippy/tests/ui/crashes/ice-5835.stderr index 74d99a348..1f930e1f6 100644 --- a/src/tools/clippy/tests/ui/crashes/ice-5835.stderr +++ b/src/tools/clippy/tests/ui/crashes/ice-5835.stderr @@ -7,5 +7,5 @@ LL | /// 位 = note: `-D clippy::tabs-in-doc-comments` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::tabs_in_doc_comments)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/crashes/ice-5872.stderr b/src/tools/clippy/tests/ui/crashes/ice-5872.stderr index 75a26ee31..d0067a223 100644 --- a/src/tools/clippy/tests/ui/crashes/ice-5872.stderr +++ b/src/tools/clippy/tests/ui/crashes/ice-5872.stderr @@ -7,5 +7,5 @@ LL | let _ = vec![1, 2, 3].into_iter().collect::<Vec<_>>().is_empty(); = note: `-D clippy::needless-collect` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::needless_collect)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/crashes/ice-6254.stderr b/src/tools/clippy/tests/ui/crashes/ice-6254.stderr index 6ace7dae8..7a34e6cce 100644 --- a/src/tools/clippy/tests/ui/crashes/ice-6254.stderr +++ b/src/tools/clippy/tests/ui/crashes/ice-6254.stderr @@ -11,5 +11,5 @@ LL | FOO_REF_REF => {}, = note: `-D indirect-structural-match` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(indirect_structural_match)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/crashes/ice-6255.stderr b/src/tools/clippy/tests/ui/crashes/ice-6255.stderr index db0cb25e3..bc13319be 100644 --- a/src/tools/clippy/tests/ui/crashes/ice-6255.stderr +++ b/src/tools/clippy/tests/ui/crashes/ice-6255.stderr @@ -9,5 +9,5 @@ LL | define_other_core!(); | = note: this error originates in the macro `define_other_core` (in Nightly builds, run with -Z macro-backtrace for more info) -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/crashes/ice-6256.stderr b/src/tools/clippy/tests/ui/crashes/ice-6256.stderr index 671933157..cba6df194 100644 --- a/src/tools/clippy/tests/ui/crashes/ice-6256.stderr +++ b/src/tools/clippy/tests/ui/crashes/ice-6256.stderr @@ -9,6 +9,6 @@ LL | let f = |x: &dyn TT| x.func(); | | let's call the lifetime of this reference `'1` | `x` is a reference that is only valid in the closure body -error: aborting due to previous error +error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0521`. diff --git a/src/tools/clippy/tests/ui/crashes/ice-7169.stderr b/src/tools/clippy/tests/ui/crashes/ice-7169.stderr index 47947f89b..3126de93d 100644 --- a/src/tools/clippy/tests/ui/crashes/ice-7169.stderr +++ b/src/tools/clippy/tests/ui/crashes/ice-7169.stderr @@ -7,5 +7,5 @@ LL | if let Ok(_) = Ok::<_, ()>(A::<String>::default()) {} = note: `-D clippy::redundant-pattern-matching` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::redundant_pattern_matching)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/crashes/ice-7868.stderr b/src/tools/clippy/tests/ui/crashes/ice-7868.stderr index e5f14f221..3315a8d90 100644 --- a/src/tools/clippy/tests/ui/crashes/ice-7868.stderr +++ b/src/tools/clippy/tests/ui/crashes/ice-7868.stderr @@ -8,5 +8,5 @@ LL | unsafe { 0 }; = note: `-D clippy::undocumented-unsafe-blocks` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::undocumented_unsafe_blocks)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/crashes/ice-7869.stderr b/src/tools/clippy/tests/ui/crashes/ice-7869.stderr index 7acace78a..22f2c7e46 100644 --- a/src/tools/clippy/tests/ui/crashes/ice-7869.stderr +++ b/src/tools/clippy/tests/ui/crashes/ice-7869.stderr @@ -13,5 +13,5 @@ LL | | } = note: `-D clippy::enum-variant-names` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::enum_variant_names)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/crashes/ice-8250.stderr b/src/tools/clippy/tests/ui/crashes/ice-8250.stderr index 9c57f3345..397e978af 100644 --- a/src/tools/clippy/tests/ui/crashes/ice-8250.stderr +++ b/src/tools/clippy/tests/ui/crashes/ice-8250.stderr @@ -7,5 +7,5 @@ LL | let _ = s[1..].splitn(2, '.').next()?; = note: `-D clippy::needless-splitn` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::needless_splitn)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/crashes/ice-8821.stderr b/src/tools/clippy/tests/ui/crashes/ice-8821.stderr index c8bd01fb1..94ebb2091 100644 --- a/src/tools/clippy/tests/ui/crashes/ice-8821.stderr +++ b/src/tools/clippy/tests/ui/crashes/ice-8821.stderr @@ -7,5 +7,5 @@ LL | let _: () = FN(); = note: `-D clippy::let-unit-value` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::let_unit_value)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/crashes/ice-9041.stderr b/src/tools/clippy/tests/ui/crashes/ice-9041.stderr index 49c9bdc30..00b65f00d 100644 --- a/src/tools/clippy/tests/ui/crashes/ice-9041.stderr +++ b/src/tools/clippy/tests/ui/crashes/ice-9041.stderr @@ -7,5 +7,5 @@ LL | things.iter().find(|p| is_thing_ready(p)).is_some() = note: `-D clippy::search-is-some` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::search_is_some)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/crashes/ice-9445.stderr b/src/tools/clippy/tests/ui/crashes/ice-9445.stderr index 9307409ba..f97b4536e 100644 --- a/src/tools/clippy/tests/ui/crashes/ice-9445.stderr +++ b/src/tools/clippy/tests/ui/crashes/ice-9445.stderr @@ -9,5 +9,5 @@ LL | const UNINIT: core::mem::MaybeUninit<core::cell::Cell<&'static ()>> = core: = note: `-D clippy::declare-interior-mutable-const` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::declare_interior_mutable_const)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/crashes/ice-96721.stderr b/src/tools/clippy/tests/ui/crashes/ice-96721.stderr index 712bd14c6..1741c7c6a 100644 --- a/src/tools/clippy/tests/ui/crashes/ice-96721.stderr +++ b/src/tools/clippy/tests/ui/crashes/ice-96721.stderr @@ -4,5 +4,5 @@ error: malformed `path` attribute input LL | #[path = foo!()] | ^^^^^^^^^^^^^^^^ help: must be of the form: `#[path = "file"]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/crashes/needless_lifetimes_impl_trait.stderr b/src/tools/clippy/tests/ui/crashes/needless_lifetimes_impl_trait.stderr index 37484f5eb..2ebb9d5cd 100644 --- a/src/tools/clippy/tests/ui/crashes/needless_lifetimes_impl_trait.stderr +++ b/src/tools/clippy/tests/ui/crashes/needless_lifetimes_impl_trait.stderr @@ -15,5 +15,5 @@ LL - fn baz<'a>(&'a self) -> impl Foo + 'a { LL + fn baz(&self) -> impl Foo + '_ { | -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/crashes/needless_pass_by_value-w-late-bound.stderr b/src/tools/clippy/tests/ui/crashes/needless_pass_by_value-w-late-bound.stderr index 6d4539399..b318f8d3f 100644 --- a/src/tools/clippy/tests/ui/crashes/needless_pass_by_value-w-late-bound.stderr +++ b/src/tools/clippy/tests/ui/crashes/needless_pass_by_value-w-late-bound.stderr @@ -12,5 +12,5 @@ LL | struct Foo<'a>(&'a [(); 100]); = note: `-D clippy::needless-pass-by-value` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::needless_pass_by_value)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/crate_in_macro_def.stderr b/src/tools/clippy/tests/ui/crate_in_macro_def.stderr index 3e6246182..1a21d4e92 100644 --- a/src/tools/clippy/tests/ui/crate_in_macro_def.stderr +++ b/src/tools/clippy/tests/ui/crate_in_macro_def.stderr @@ -7,5 +7,5 @@ LL | println!("{}", crate::unhygienic::MESSAGE); = note: `-D clippy::crate-in-macro-def` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::crate_in_macro_def)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/crate_level_checks/no_std_swap.stderr b/src/tools/clippy/tests/ui/crate_level_checks/no_std_swap.stderr index 01033246d..7ef8d08d5 100644 --- a/src/tools/clippy/tests/ui/crate_level_checks/no_std_swap.stderr +++ b/src/tools/clippy/tests/ui/crate_level_checks/no_std_swap.stderr @@ -11,5 +11,5 @@ LL | | b = a; = note: `-D clippy::almost-swapped` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::almost_swapped)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/crate_level_checks/std_main_recursion.stderr b/src/tools/clippy/tests/ui/crate_level_checks/std_main_recursion.stderr index f3ffd6a10..3bc406206 100644 --- a/src/tools/clippy/tests/ui/crate_level_checks/std_main_recursion.stderr +++ b/src/tools/clippy/tests/ui/crate_level_checks/std_main_recursion.stderr @@ -8,5 +8,5 @@ LL | main(); = note: `-D clippy::main-recursion` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::main_recursion)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/dbg_macro/auxiliary/submodule.rs b/src/tools/clippy/tests/ui/dbg_macro/auxiliary/submodule.rs new file mode 100644 index 000000000..b1df24737 --- /dev/null +++ b/src/tools/clippy/tests/ui/dbg_macro/auxiliary/submodule.rs @@ -0,0 +1,3 @@ +fn f() { + dbg!(); +} diff --git a/src/tools/clippy/tests/ui/dbg_macro.rs b/src/tools/clippy/tests/ui/dbg_macro/dbg_macro.rs index 149b08476..3f4770c63 100644 --- a/src/tools/clippy/tests/ui/dbg_macro.rs +++ b/src/tools/clippy/tests/ui/dbg_macro/dbg_macro.rs @@ -2,10 +2,12 @@ #![warn(clippy::dbg_macro)] +#[path = "auxiliary/submodule.rs"] +mod submodule; + fn foo(n: u32) -> u32 { if let Some(n) = dbg!(n.checked_sub(4)) { n } else { n } //~^ ERROR: the `dbg!` macro is intended as a debugging tool - //~| NOTE: `-D clippy::dbg-macro` implied by `-D warnings` } fn bar(_: ()) {} diff --git a/src/tools/clippy/tests/ui/dbg_macro.stderr b/src/tools/clippy/tests/ui/dbg_macro/dbg_macro.stderr index f45a7ba1f..4d00421c7 100644 --- a/src/tools/clippy/tests/ui/dbg_macro.stderr +++ b/src/tools/clippy/tests/ui/dbg_macro/dbg_macro.stderr @@ -1,18 +1,30 @@ error: the `dbg!` macro is intended as a debugging tool - --> $DIR/dbg_macro.rs:6:22 + --> $DIR/auxiliary/submodule.rs:2:5 | -LL | if let Some(n) = dbg!(n.checked_sub(4)) { n } else { n } - | ^^^^^^^^^^^^^^^^^^^^^^ +LL | dbg!(); + | ^^^^^^^ | = note: `-D clippy::dbg-macro` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::dbg_macro)]` help: remove the invocation before committing it to a version control system | +LL - dbg!(); +LL + + | + +error: the `dbg!` macro is intended as a debugging tool + --> $DIR/dbg_macro.rs:9:22 + | +LL | if let Some(n) = dbg!(n.checked_sub(4)) { n } else { n } + | ^^^^^^^^^^^^^^^^^^^^^^ + | +help: remove the invocation before committing it to a version control system + | LL | if let Some(n) = n.checked_sub(4) { n } else { n } | ~~~~~~~~~~~~~~~~ error: the `dbg!` macro is intended as a debugging tool - --> $DIR/dbg_macro.rs:13:8 + --> $DIR/dbg_macro.rs:15:8 | LL | if dbg!(n <= 1) { | ^^^^^^^^^^^^ @@ -23,7 +35,7 @@ LL | if n <= 1 { | ~~~~~~ error: the `dbg!` macro is intended as a debugging tool - --> $DIR/dbg_macro.rs:15:9 + --> $DIR/dbg_macro.rs:17:9 | LL | dbg!(1) | ^^^^^^^ @@ -34,7 +46,7 @@ LL | 1 | error: the `dbg!` macro is intended as a debugging tool - --> $DIR/dbg_macro.rs:18:9 + --> $DIR/dbg_macro.rs:20:9 | LL | dbg!(n * factorial(n - 1)) | ^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -45,7 +57,7 @@ LL | n * factorial(n - 1) | error: the `dbg!` macro is intended as a debugging tool - --> $DIR/dbg_macro.rs:24:5 + --> $DIR/dbg_macro.rs:26:5 | LL | dbg!(42); | ^^^^^^^^ @@ -56,7 +68,7 @@ LL | 42; | ~~ error: the `dbg!` macro is intended as a debugging tool - --> $DIR/dbg_macro.rs:26:5 + --> $DIR/dbg_macro.rs:28:5 | LL | dbg!(dbg!(dbg!(42))); | ^^^^^^^^^^^^^^^^^^^^ @@ -67,7 +79,7 @@ LL | dbg!(dbg!(42)); | ~~~~~~~~~~~~~~ error: the `dbg!` macro is intended as a debugging tool - --> $DIR/dbg_macro.rs:28:14 + --> $DIR/dbg_macro.rs:30:14 | LL | foo(3) + dbg!(factorial(4)); | ^^^^^^^^^^^^^^^^^^ @@ -78,7 +90,7 @@ LL | foo(3) + factorial(4); | ~~~~~~~~~~~~ error: the `dbg!` macro is intended as a debugging tool - --> $DIR/dbg_macro.rs:30:5 + --> $DIR/dbg_macro.rs:32:5 | LL | dbg!(1, 2, dbg!(3, 4)); | ^^^^^^^^^^^^^^^^^^^^^^ @@ -89,7 +101,7 @@ LL | (1, 2, dbg!(3, 4)); | ~~~~~~~~~~~~~~~~~~ error: the `dbg!` macro is intended as a debugging tool - --> $DIR/dbg_macro.rs:32:5 + --> $DIR/dbg_macro.rs:34:5 | LL | dbg!(1, 2, 3, 4, 5); | ^^^^^^^^^^^^^^^^^^^ @@ -100,7 +112,7 @@ LL | (1, 2, 3, 4, 5); | ~~~~~~~~~~~~~~~ error: the `dbg!` macro is intended as a debugging tool - --> $DIR/dbg_macro.rs:53:5 + --> $DIR/dbg_macro.rs:55:5 | LL | dbg!(); | ^^^^^^^ @@ -112,7 +124,7 @@ LL + | error: the `dbg!` macro is intended as a debugging tool - --> $DIR/dbg_macro.rs:56:13 + --> $DIR/dbg_macro.rs:58:13 | LL | let _ = dbg!(); | ^^^^^^ @@ -123,7 +135,7 @@ LL | let _ = (); | ~~ error: the `dbg!` macro is intended as a debugging tool - --> $DIR/dbg_macro.rs:58:9 + --> $DIR/dbg_macro.rs:60:9 | LL | bar(dbg!()); | ^^^^^^ @@ -134,7 +146,7 @@ LL | bar(()); | ~~ error: the `dbg!` macro is intended as a debugging tool - --> $DIR/dbg_macro.rs:60:10 + --> $DIR/dbg_macro.rs:62:10 | LL | foo!(dbg!()); | ^^^^^^ @@ -145,7 +157,7 @@ LL | foo!(()); | ~~ error: the `dbg!` macro is intended as a debugging tool - --> $DIR/dbg_macro.rs:62:16 + --> $DIR/dbg_macro.rs:64:16 | LL | foo2!(foo!(dbg!())); | ^^^^^^ @@ -156,7 +168,7 @@ LL | foo2!(foo!(())); | ~~ error: the `dbg!` macro is intended as a debugging tool - --> $DIR/dbg_macro.rs:84:9 + --> $DIR/dbg_macro.rs:86:9 | LL | dbg!(2); | ^^^^^^^ @@ -167,7 +179,7 @@ LL | 2; | ~ error: the `dbg!` macro is intended as a debugging tool - --> $DIR/dbg_macro.rs:91:5 + --> $DIR/dbg_macro.rs:93:5 | LL | dbg!(1); | ^^^^^^^ @@ -178,7 +190,7 @@ LL | 1; | ~ error: the `dbg!` macro is intended as a debugging tool - --> $DIR/dbg_macro.rs:97:5 + --> $DIR/dbg_macro.rs:99:5 | LL | dbg!(1); | ^^^^^^^ @@ -189,7 +201,7 @@ LL | 1; | ~ error: the `dbg!` macro is intended as a debugging tool - --> $DIR/dbg_macro.rs:104:9 + --> $DIR/dbg_macro.rs:106:9 | LL | dbg!(1); | ^^^^^^^ @@ -199,5 +211,5 @@ help: remove the invocation before committing it to a version control system LL | 1; | ~ -error: aborting due to 18 previous errors +error: aborting due to 19 previous errors diff --git a/src/tools/clippy/tests/ui/def_id_nocore.stderr b/src/tools/clippy/tests/ui/def_id_nocore.stderr index bfd0de4e1..6a00331ec 100644 --- a/src/tools/clippy/tests/ui/def_id_nocore.stderr +++ b/src/tools/clippy/tests/ui/def_id_nocore.stderr @@ -8,5 +8,5 @@ LL | pub fn as_ref(self) -> &'static str { = note: `-D clippy::wrong-self-convention` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::wrong_self_convention)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/doc/doc-fixable.fixed b/src/tools/clippy/tests/ui/doc/doc-fixable.fixed index aee897197..708ac6666 100644 --- a/src/tools/clippy/tests/ui/doc/doc-fixable.fixed +++ b/src/tools/clippy/tests/ui/doc/doc-fixable.fixed @@ -227,3 +227,6 @@ where [(); N.checked_next_power_of_two().unwrap()]: { /// this checks if the lowerCamelCase issue is fixed fn issue_11568() {} + +/// There is no try (`do()` or `do_not()`). +fn parenthesized_word() {} diff --git a/src/tools/clippy/tests/ui/doc/doc-fixable.rs b/src/tools/clippy/tests/ui/doc/doc-fixable.rs index b6346b881..040d6352c 100644 --- a/src/tools/clippy/tests/ui/doc/doc-fixable.rs +++ b/src/tools/clippy/tests/ui/doc/doc-fixable.rs @@ -227,3 +227,6 @@ where [(); N.checked_next_power_of_two().unwrap()]: { /// this checks if the lowerCamelCase issue is fixed fn issue_11568() {} + +/// There is no try (do() or do_not()). +fn parenthesized_word() {} diff --git a/src/tools/clippy/tests/ui/doc/doc-fixable.stderr b/src/tools/clippy/tests/ui/doc/doc-fixable.stderr index 4c9ff41d9..033604e03 100644 --- a/src/tools/clippy/tests/ui/doc/doc-fixable.stderr +++ b/src/tools/clippy/tests/ui/doc/doc-fixable.stderr @@ -319,5 +319,27 @@ help: try LL | /// Foo \[bar\] \[baz\] \[qux\]. `DocMarkdownLint` | ~~~~~~~~~~~~~~~~~ -error: aborting due to 29 previous errors +error: item in documentation is missing backticks + --> $DIR/doc-fixable.rs:231:22 + | +LL | /// There is no try (do() or do_not()). + | ^^^^ + | +help: try + | +LL | /// There is no try (`do()` or do_not()). + | ~~~~~~ + +error: item in documentation is missing backticks + --> $DIR/doc-fixable.rs:231:30 + | +LL | /// There is no try (do() or do_not()). + | ^^^^^^^^ + | +help: try + | +LL | /// There is no try (do() or `do_not()`). + | ~~~~~~~~~~ + +error: aborting due to 31 previous errors diff --git a/src/tools/clippy/tests/ui/doc_link_with_quotes.rs b/src/tools/clippy/tests/ui/doc_link_with_quotes.rs index 37d0d1359..48e1b1819 100644 --- a/src/tools/clippy/tests/ui/doc_link_with_quotes.rs +++ b/src/tools/clippy/tests/ui/doc_link_with_quotes.rs @@ -11,6 +11,12 @@ pub fn foo() { bar() } +/// Calls ["bar"] uselessly +//~^ ERROR: possible intra-doc link using quotes instead of backticks +pub fn foo2() { + bar() +} + /// # Examples /// This demonstrates issue \#8961 /// ``` diff --git a/src/tools/clippy/tests/ui/doc_link_with_quotes.stderr b/src/tools/clippy/tests/ui/doc_link_with_quotes.stderr index 2db1bc092..cd4f87c56 100644 --- a/src/tools/clippy/tests/ui/doc_link_with_quotes.stderr +++ b/src/tools/clippy/tests/ui/doc_link_with_quotes.stderr @@ -7,5 +7,11 @@ LL | /// Calls ['bar'] uselessly = note: `-D clippy::doc-link-with-quotes` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::doc_link_with_quotes)]` -error: aborting due to previous error +error: possible intra-doc link using quotes instead of backticks + --> $DIR/doc_link_with_quotes.rs:14:12 + | +LL | /// Calls ["bar"] uselessly + | ^^^^^ + +error: aborting due to 2 previous errors diff --git a/src/tools/clippy/tests/ui/double_neg.stderr b/src/tools/clippy/tests/ui/double_neg.stderr index a6241c786..a4fa1688d 100644 --- a/src/tools/clippy/tests/ui/double_neg.stderr +++ b/src/tools/clippy/tests/ui/double_neg.stderr @@ -7,5 +7,5 @@ LL | --x; = note: `-D clippy::double-neg` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::double_neg)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/duplicate_underscore_argument.stderr b/src/tools/clippy/tests/ui/duplicate_underscore_argument.stderr index f47f6c896..53ee0c4e8 100644 --- a/src/tools/clippy/tests/ui/duplicate_underscore_argument.stderr +++ b/src/tools/clippy/tests/ui/duplicate_underscore_argument.stderr @@ -7,5 +7,5 @@ LL | fn join_the_dark_side(darth: i32, _darth: i32) {} = note: `-D clippy::duplicate-underscore-argument` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::duplicate_underscore_argument)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/empty_enum.stderr b/src/tools/clippy/tests/ui/empty_enum.stderr index 92d81c726..c9bd88764 100644 --- a/src/tools/clippy/tests/ui/empty_enum.stderr +++ b/src/tools/clippy/tests/ui/empty_enum.stderr @@ -8,5 +8,5 @@ LL | enum Empty {} = note: `-D clippy::empty-enum` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::empty_enum)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/entry_btree.stderr b/src/tools/clippy/tests/ui/entry_btree.stderr index cc0e951d9..63e9a0af8 100644 --- a/src/tools/clippy/tests/ui/entry_btree.stderr +++ b/src/tools/clippy/tests/ui/entry_btree.stderr @@ -17,5 +17,5 @@ LL + foo(); LL + } | -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/exit1.stderr b/src/tools/clippy/tests/ui/exit1.stderr index 94d8f1e32..bbe0762c8 100644 --- a/src/tools/clippy/tests/ui/exit1.stderr +++ b/src/tools/clippy/tests/ui/exit1.stderr @@ -7,5 +7,5 @@ LL | std::process::exit(4); = note: `-D clippy::exit` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::exit)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/exit2.stderr b/src/tools/clippy/tests/ui/exit2.stderr index cd324f182..19abbc606 100644 --- a/src/tools/clippy/tests/ui/exit2.stderr +++ b/src/tools/clippy/tests/ui/exit2.stderr @@ -7,5 +7,5 @@ LL | std::process::exit(3); = note: `-D clippy::exit` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::exit)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/explicit_auto_deref.fixed b/src/tools/clippy/tests/ui/explicit_auto_deref.fixed index 12158d0d1..e6ca4bb66 100644 --- a/src/tools/clippy/tests/ui/explicit_auto_deref.fixed +++ b/src/tools/clippy/tests/ui/explicit_auto_deref.fixed @@ -301,24 +301,47 @@ fn main() { }; // Issue #11474 - pub struct Variant { - pub anonymous: Variant0, + #[derive(Clone, Copy)] + struct Wrap<T>(T); + impl<T> core::ops::Deref for Wrap<T> { + type Target = T; + fn deref(&self) -> &T { + &self.0 + } } - - pub union Variant0 { - pub anonymous: std::mem::ManuallyDrop<Variant00>, + impl<T> core::ops::DerefMut for Wrap<T> { + fn deref_mut(&mut self) -> &mut T { + &mut self.0 + } } - pub struct Variant00 { - pub anonymous: Variant000, + union U<T: Copy> { + u: T, } - pub union Variant000 { - pub val: i32, + #[derive(Clone, Copy)] + struct S8 { + x: &'static str, } unsafe { - let mut p = core::mem::zeroed::<Variant>(); - (*p.anonymous.anonymous).anonymous.val = 1; + let mut x = U { + u: core::mem::ManuallyDrop::new(S8 { x: "" }), + }; + let _ = &mut (*x.u).x; + let _ = &mut { x.u }.x; + let _ = &mut ({ *x.u }).x; + + let mut x = U { + u: Wrap(core::mem::ManuallyDrop::new(S8 { x: "" })), + }; + let _ = &mut (*x.u).x; + let _ = &mut { x.u }.x; + let _ = &mut ({ **x.u }).x; + + let mut x = U { u: Wrap(S8 { x: "" }) }; + let _ = &mut x.u.x; + let _ = &mut { x.u }.x; + let _ = &mut ({ *x.u }).x; } } diff --git a/src/tools/clippy/tests/ui/explicit_auto_deref.rs b/src/tools/clippy/tests/ui/explicit_auto_deref.rs index dec021c18..7531e1f87 100644 --- a/src/tools/clippy/tests/ui/explicit_auto_deref.rs +++ b/src/tools/clippy/tests/ui/explicit_auto_deref.rs @@ -301,24 +301,47 @@ fn main() { }; // Issue #11474 - pub struct Variant { - pub anonymous: Variant0, + #[derive(Clone, Copy)] + struct Wrap<T>(T); + impl<T> core::ops::Deref for Wrap<T> { + type Target = T; + fn deref(&self) -> &T { + &self.0 + } } - - pub union Variant0 { - pub anonymous: std::mem::ManuallyDrop<Variant00>, + impl<T> core::ops::DerefMut for Wrap<T> { + fn deref_mut(&mut self) -> &mut T { + &mut self.0 + } } - pub struct Variant00 { - pub anonymous: Variant000, + union U<T: Copy> { + u: T, } - pub union Variant000 { - pub val: i32, + #[derive(Clone, Copy)] + struct S8 { + x: &'static str, } unsafe { - let mut p = core::mem::zeroed::<Variant>(); - (*p.anonymous.anonymous).anonymous.val = 1; + let mut x = U { + u: core::mem::ManuallyDrop::new(S8 { x: "" }), + }; + let _ = &mut (*x.u).x; + let _ = &mut (*{ x.u }).x; + let _ = &mut ({ *x.u }).x; + + let mut x = U { + u: Wrap(core::mem::ManuallyDrop::new(S8 { x: "" })), + }; + let _ = &mut (**x.u).x; + let _ = &mut (**{ x.u }).x; + let _ = &mut ({ **x.u }).x; + + let mut x = U { u: Wrap(S8 { x: "" }) }; + let _ = &mut (*x.u).x; + let _ = &mut (*{ x.u }).x; + let _ = &mut ({ *x.u }).x; } } diff --git a/src/tools/clippy/tests/ui/explicit_auto_deref.stderr b/src/tools/clippy/tests/ui/explicit_auto_deref.stderr index 3d2a7b0d9..cc9eeeb50 100644 --- a/src/tools/clippy/tests/ui/explicit_auto_deref.stderr +++ b/src/tools/clippy/tests/ui/explicit_auto_deref.stderr @@ -241,5 +241,35 @@ error: deref which would be done by auto-deref LL | Some(x) => &mut *x, | ^^^^^^^ help: try: `x` -error: aborting due to 40 previous errors +error: deref which would be done by auto-deref + --> $DIR/explicit_auto_deref.rs:332:22 + | +LL | let _ = &mut (*{ x.u }).x; + | ^^^^^^^^^^ help: try: `{ x.u }` + +error: deref which would be done by auto-deref + --> $DIR/explicit_auto_deref.rs:338:22 + | +LL | let _ = &mut (**x.u).x; + | ^^^^^^^ help: try: `(*x.u)` + +error: deref which would be done by auto-deref + --> $DIR/explicit_auto_deref.rs:339:22 + | +LL | let _ = &mut (**{ x.u }).x; + | ^^^^^^^^^^^ help: try: `{ x.u }` + +error: deref which would be done by auto-deref + --> $DIR/explicit_auto_deref.rs:343:22 + | +LL | let _ = &mut (*x.u).x; + | ^^^^^^ help: try: `x.u` + +error: deref which would be done by auto-deref + --> $DIR/explicit_auto_deref.rs:344:22 + | +LL | let _ = &mut (*{ x.u }).x; + | ^^^^^^^^^^ help: try: `{ x.u }` + +error: aborting due to 45 previous errors diff --git a/src/tools/clippy/tests/ui/filter_map_next.stderr b/src/tools/clippy/tests/ui/filter_map_next.stderr index 184155391..07760d883 100644 --- a/src/tools/clippy/tests/ui/filter_map_next.stderr +++ b/src/tools/clippy/tests/ui/filter_map_next.stderr @@ -14,5 +14,5 @@ LL | | .next(); = note: `-D clippy::filter-map-next` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::filter_map_next)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/floating_point_mul_add.fixed b/src/tools/clippy/tests/ui/floating_point_mul_add.fixed index a4d6d49e5..3ce2edf2c 100644 --- a/src/tools/clippy/tests/ui/floating_point_mul_add.fixed +++ b/src/tools/clippy/tests/ui/floating_point_mul_add.fixed @@ -39,3 +39,21 @@ fn main() { // Cases where the lint shouldn't be applied let _ = (a * a + b * b).sqrt(); } + +fn _issue11831() { + struct NotAFloat; + + impl std::ops::Add<f64> for NotAFloat { + type Output = Self; + + fn add(self, _: f64) -> Self { + NotAFloat + } + } + + let a = NotAFloat; + let b = 1.0_f64; + let c = 1.0; + + let _ = a + b * c; +} diff --git a/src/tools/clippy/tests/ui/floating_point_mul_add.rs b/src/tools/clippy/tests/ui/floating_point_mul_add.rs index 262a20f0f..b5e4a8db4 100644 --- a/src/tools/clippy/tests/ui/floating_point_mul_add.rs +++ b/src/tools/clippy/tests/ui/floating_point_mul_add.rs @@ -39,3 +39,21 @@ fn main() { // Cases where the lint shouldn't be applied let _ = (a * a + b * b).sqrt(); } + +fn _issue11831() { + struct NotAFloat; + + impl std::ops::Add<f64> for NotAFloat { + type Output = Self; + + fn add(self, _: f64) -> Self { + NotAFloat + } + } + + let a = NotAFloat; + let b = 1.0_f64; + let c = 1.0; + + let _ = a + b * c; +} diff --git a/src/tools/clippy/tests/ui/four_forward_slashes_first_line.stderr b/src/tools/clippy/tests/ui/four_forward_slashes_first_line.stderr index afb7c6b4d..f49b7a097 100644 --- a/src/tools/clippy/tests/ui/four_forward_slashes_first_line.stderr +++ b/src/tools/clippy/tests/ui/four_forward_slashes_first_line.stderr @@ -12,5 +12,5 @@ help: make this a doc comment by removing one `/` LL + /// borked doc comment on the first line. doesn't combust! | -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/functions_maxlines.stderr b/src/tools/clippy/tests/ui/functions_maxlines.stderr index 1d6ddad79..497acc0a6 100644 --- a/src/tools/clippy/tests/ui/functions_maxlines.stderr +++ b/src/tools/clippy/tests/ui/functions_maxlines.stderr @@ -13,5 +13,5 @@ LL | | } = note: `-D clippy::too-many-lines` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::too_many_lines)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/impl_hash_with_borrow_str_and_bytes.rs b/src/tools/clippy/tests/ui/impl_hash_with_borrow_str_and_bytes.rs new file mode 100644 index 000000000..f6ce6153e --- /dev/null +++ b/src/tools/clippy/tests/ui/impl_hash_with_borrow_str_and_bytes.rs @@ -0,0 +1,136 @@ +#![warn(clippy::impl_hash_borrow_with_str_and_bytes)] + +use std::borrow::Borrow; +use std::hash::{Hash, Hasher}; + +struct ExampleType { + data: String, +} + +impl Hash for ExampleType { + //~^ ERROR: can't + fn hash<H: Hasher>(&self, state: &mut H) { + self.data.hash(state); + } +} + +impl Borrow<str> for ExampleType { + fn borrow(&self) -> &str { + &self.data + } +} + +impl Borrow<[u8]> for ExampleType { + fn borrow(&self) -> &[u8] { + self.data.as_bytes() + } +} + +struct ShouldNotRaiseForHash {} +impl Hash for ShouldNotRaiseForHash { + fn hash<H: Hasher>(&self, state: &mut H) { + todo!(); + } +} + +struct ShouldNotRaiseForBorrow {} +impl Borrow<str> for ShouldNotRaiseForBorrow { + fn borrow(&self) -> &str { + todo!(); + } +} +impl Borrow<[u8]> for ShouldNotRaiseForBorrow { + fn borrow(&self) -> &[u8] { + todo!(); + } +} + +struct ShouldNotRaiseForHashBorrowStr {} +impl Hash for ShouldNotRaiseForHashBorrowStr { + fn hash<H: Hasher>(&self, state: &mut H) { + todo!(); + } +} +impl Borrow<str> for ShouldNotRaiseForHashBorrowStr { + fn borrow(&self) -> &str { + todo!(); + } +} + +struct ShouldNotRaiseForHashBorrowSlice {} +impl Hash for ShouldNotRaiseForHashBorrowSlice { + fn hash<H: Hasher>(&self, state: &mut H) { + todo!(); + } +} + +impl Borrow<[u8]> for ShouldNotRaiseForHashBorrowSlice { + fn borrow(&self) -> &[u8] { + todo!(); + } +} + +#[derive(Hash)] +//~^ ERROR: can't +struct Derived { + data: String, +} + +impl Borrow<str> for Derived { + fn borrow(&self) -> &str { + self.data.as_str() + } +} + +impl Borrow<[u8]> for Derived { + fn borrow(&self) -> &[u8] { + self.data.as_bytes() + } +} + +struct GenericExampleType<T> { + data: T, +} + +impl<T: Hash> Hash for GenericExampleType<T> { + fn hash<H: Hasher>(&self, state: &mut H) { + self.data.hash(state); + } +} + +impl Borrow<str> for GenericExampleType<String> { + fn borrow(&self) -> &str { + &self.data + } +} + +impl Borrow<[u8]> for GenericExampleType<&'static [u8]> { + fn borrow(&self) -> &[u8] { + self.data + } +} + +struct GenericExampleType2<T> { + data: T, +} + +impl Hash for GenericExampleType2<String> { + //~^ ERROR: can't + // this is correctly throwing an error for generic with concrete impl + // for all 3 types + fn hash<H: Hasher>(&self, state: &mut H) { + self.data.hash(state); + } +} + +impl Borrow<str> for GenericExampleType2<String> { + fn borrow(&self) -> &str { + &self.data + } +} + +impl Borrow<[u8]> for GenericExampleType2<String> { + fn borrow(&self) -> &[u8] { + self.data.as_bytes() + } +} diff --git a/src/tools/clippy/tests/ui/impl_hash_with_borrow_str_and_bytes.stderr b/src/tools/clippy/tests/ui/impl_hash_with_borrow_str_and_bytes.stderr new file mode 100644 index 000000000..afc35ef98 --- /dev/null +++ b/src/tools/clippy/tests/ui/impl_hash_with_borrow_str_and_bytes.stderr @@ -0,0 +1,41 @@ +error: the semantics of `Borrow<T>` around `Hash` can't be satisfied when both `Borrow<str>` and `Borrow<[u8]>` are implemented + --> $DIR/impl_hash_with_borrow_str_and_bytes.rs:10:6 + | +LL | impl Hash for ExampleType { + | ^^^^ + | + = note: the `Borrow` semantics require that `Hash` must behave the same for all implementations of Borrow<T> + = note: however, the hash implementations of a string (`str`) and the bytes of a string `[u8]` do not behave the same ... + = note: ... as (`hash("abc") != hash("abc".as_bytes())` + = help: consider either removing one of the `Borrow` implementations (`Borrow<str>` or `Borrow<[u8]>`) ... + = help: ... or not implementing `Hash` for this type + = note: `-D clippy::impl-hash-borrow-with-str-and-bytes` implied by `-D warnings` + = help: to override `-D warnings` add `#[allow(clippy::impl_hash_borrow_with_str_and_bytes)]` + +error: the semantics of `Borrow<T>` around `Hash` can't be satisfied when both `Borrow<str>` and `Borrow<[u8]>` are implemented + --> $DIR/impl_hash_with_borrow_str_and_bytes.rs:73:10 + | +LL | #[derive(Hash)] + | ^^^^ + | + = note: the `Borrow` semantics require that `Hash` must behave the same for all implementations of Borrow<T> + = note: however, the hash implementations of a string (`str`) and the bytes of a string `[u8]` do not behave the same ... + = note: ... as (`hash("abc") != hash("abc".as_bytes())` + = help: consider either removing one of the `Borrow` implementations (`Borrow<str>` or `Borrow<[u8]>`) ... + = help: ... or not implementing `Hash` for this type + = note: this error originates in the derive macro `Hash` (in Nightly builds, run with -Z macro-backtrace for more info) + +error: the semantics of `Borrow<T>` around `Hash` can't be satisfied when both `Borrow<str>` and `Borrow<[u8]>` are implemented + --> $DIR/impl_hash_with_borrow_str_and_bytes.rs:117:6 + | +LL | impl Hash for GenericExampleType2<String> { + | ^^^^ + | + = note: the `Borrow` semantics require that `Hash` must behave the same for all implementations of Borrow<T> + = note: however, the hash implementations of a string (`str`) and the bytes of a string `[u8]` do not behave the same ... + = note: ... as (`hash("abc") != hash("abc".as_bytes())` + = help: consider either removing one of the `Borrow` implementations (`Borrow<str>` or `Borrow<[u8]>`) ... + = help: ... or not implementing `Hash` for this type + +error: aborting due to 3 previous errors + diff --git a/src/tools/clippy/tests/ui/index_refutable_slice/slice_indexing_in_macro.stderr b/src/tools/clippy/tests/ui/index_refutable_slice/slice_indexing_in_macro.stderr index 11b19428b..429861e99 100644 --- a/src/tools/clippy/tests/ui/index_refutable_slice/slice_indexing_in_macro.stderr +++ b/src/tools/clippy/tests/ui/index_refutable_slice/slice_indexing_in_macro.stderr @@ -18,5 +18,5 @@ help: and replace the index expressions here LL | println!("{}", slice_0); | ~~~~~~~ -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/ineffective_open_options.fixed b/src/tools/clippy/tests/ui/ineffective_open_options.fixed new file mode 100644 index 000000000..3af8f3c5a --- /dev/null +++ b/src/tools/clippy/tests/ui/ineffective_open_options.fixed @@ -0,0 +1,41 @@ +#![warn(clippy::ineffective_open_options)] + +use std::fs::OpenOptions; + +fn main() { + let file = OpenOptions::new() + .create(true) + //~ ERROR: unnecessary use of `.write(true)` + .append(true) + .open("dump.json") + .unwrap(); + + let file = OpenOptions::new() + .create(true) + .append(true) + //~ ERROR: unnecessary use of `.write(true)` + .open("dump.json") + .unwrap(); + + // All the next calls are ok. + let file = OpenOptions::new() + .create(true) + .write(false) + .append(true) + .open("dump.json") + .unwrap(); + let file = OpenOptions::new() + .create(true) + .write(true) + .append(false) + .open("dump.json") + .unwrap(); + let file = OpenOptions::new() + .create(true) + .write(false) + .append(false) + .open("dump.json") + .unwrap(); + let file = OpenOptions::new().create(true).append(true).open("dump.json").unwrap(); + let file = OpenOptions::new().create(true).write(true).open("dump.json").unwrap(); +} diff --git a/src/tools/clippy/tests/ui/ineffective_open_options.rs b/src/tools/clippy/tests/ui/ineffective_open_options.rs new file mode 100644 index 000000000..4eaf6293c --- /dev/null +++ b/src/tools/clippy/tests/ui/ineffective_open_options.rs @@ -0,0 +1,41 @@ +#![warn(clippy::ineffective_open_options)] + +use std::fs::OpenOptions; + +fn main() { + let file = OpenOptions::new() + .create(true) + .write(true) //~ ERROR: unnecessary use of `.write(true)` + .append(true) + .open("dump.json") + .unwrap(); + + let file = OpenOptions::new() + .create(true) + .append(true) + .write(true) //~ ERROR: unnecessary use of `.write(true)` + .open("dump.json") + .unwrap(); + + // All the next calls are ok. + let file = OpenOptions::new() + .create(true) + .write(false) + .append(true) + .open("dump.json") + .unwrap(); + let file = OpenOptions::new() + .create(true) + .write(true) + .append(false) + .open("dump.json") + .unwrap(); + let file = OpenOptions::new() + .create(true) + .write(false) + .append(false) + .open("dump.json") + .unwrap(); + let file = OpenOptions::new().create(true).append(true).open("dump.json").unwrap(); + let file = OpenOptions::new().create(true).write(true).open("dump.json").unwrap(); +} diff --git a/src/tools/clippy/tests/ui/ineffective_open_options.stderr b/src/tools/clippy/tests/ui/ineffective_open_options.stderr new file mode 100644 index 000000000..7dc532223 --- /dev/null +++ b/src/tools/clippy/tests/ui/ineffective_open_options.stderr @@ -0,0 +1,17 @@ +error: unnecessary use of `.write(true)` because there is `.append(true)` + --> $DIR/ineffective_open_options.rs:8:9 + | +LL | .write(true) + | ^^^^^^^^^^^^ help: remove `.write(true)` + | + = note: `-D clippy::ineffective-open-options` implied by `-D warnings` + = help: to override `-D warnings` add `#[allow(clippy::ineffective_open_options)]` + +error: unnecessary use of `.write(true)` because there is `.append(true)` + --> $DIR/ineffective_open_options.rs:16:9 + | +LL | .write(true) + | ^^^^^^^^^^^^ help: remove `.write(true)` + +error: aborting due to 2 previous errors + diff --git a/src/tools/clippy/tests/ui/infallible_destructuring_match.fixed b/src/tools/clippy/tests/ui/infallible_destructuring_match.fixed index 60304177b..ecf1b14e5 100644 --- a/src/tools/clippy/tests/ui/infallible_destructuring_match.fixed +++ b/src/tools/clippy/tests/ui/infallible_destructuring_match.fixed @@ -1,6 +1,6 @@ #![feature(exhaustive_patterns, never_type)] #![allow(dead_code, unreachable_code, unused_variables)] -#![allow(clippy::let_and_return)] +#![allow(clippy::let_and_return, clippy::uninhabited_references)] enum SingleVariantEnum { Variant(i32), diff --git a/src/tools/clippy/tests/ui/infallible_destructuring_match.rs b/src/tools/clippy/tests/ui/infallible_destructuring_match.rs index b77aac4a1..7cc7cb9d6 100644 --- a/src/tools/clippy/tests/ui/infallible_destructuring_match.rs +++ b/src/tools/clippy/tests/ui/infallible_destructuring_match.rs @@ -1,6 +1,6 @@ #![feature(exhaustive_patterns, never_type)] #![allow(dead_code, unreachable_code, unused_variables)] -#![allow(clippy::let_and_return)] +#![allow(clippy::let_and_return, clippy::uninhabited_references)] enum SingleVariantEnum { Variant(i32), diff --git a/src/tools/clippy/tests/ui/infinite_loops.rs b/src/tools/clippy/tests/ui/infinite_loops.rs new file mode 100644 index 000000000..646f1eca5 --- /dev/null +++ b/src/tools/clippy/tests/ui/infinite_loops.rs @@ -0,0 +1,366 @@ +//@no-rustfix +#![allow(clippy::never_loop)] +#![warn(clippy::infinite_loop)] + +fn do_something() {} + +fn no_break() { + loop { + //~^ ERROR: infinite loop detected + do_something(); + } +} + +fn all_inf() { + loop { + //~^ ERROR: infinite loop detected + loop { + //~^ ERROR: infinite loop detected + loop { + //~^ ERROR: infinite loop detected + do_something(); + } + } + do_something(); + } +} + +fn no_break_return_some_ty() -> Option<u8> { + loop { + do_something(); + return None; + } + loop { + //~^ ERROR: infinite loop detected + do_something(); + } +} + +fn no_break_never_ret() -> ! { + loop { + do_something(); + } +} + +fn no_break_never_ret_noise() { + loop { + fn inner_fn() -> ! { + std::process::exit(0); + } + do_something(); + } +} + +fn has_direct_break_1() { + loop { + do_something(); + break; + } +} + +fn has_direct_break_2() { + 'outer: loop { + do_something(); + break 'outer; + } +} + +fn has_indirect_break_1(cond: bool) { + 'outer: loop { + loop { + if cond { + break 'outer; + } + } + } +} + +fn has_indirect_break_2(stop_num: i32) { + 'outer: loop { + for x in 0..5 { + if x == stop_num { + break 'outer; + } + } + } +} + +fn break_inner_but_not_outer_1(cond: bool) { + loop { + //~^ ERROR: infinite loop detected + loop { + if cond { + break; + } + } + } +} + +fn break_inner_but_not_outer_2(cond: bool) { + loop { + //~^ ERROR: infinite loop detected + 'inner: loop { + loop { + if cond { + break 'inner; + } + } + } + } +} + +fn break_outer_but_not_inner() { + loop { + loop { + //~^ ERROR: infinite loop detected + do_something(); + } + break; + } +} + +fn can_break_both_inner_and_outer(cond: bool) { + 'outer: loop { + loop { + if cond { + break 'outer; + } else { + break; + } + } + } +} + +fn break_wrong_loop(cond: bool) { + // 'inner has statement to break 'outer loop, but it was breaked early by a labeled child loop + 'outer: loop { + loop { + //~^ ERROR: infinite loop detected + 'inner: loop { + loop { + loop { + break 'inner; + } + break 'outer; + } + } + } + } +} + +fn has_direct_return(cond: bool) { + loop { + if cond { + return; + } + } +} + +fn ret_in_inner(cond: bool) { + loop { + loop { + if cond { + return; + } + } + } +} + +enum Foo { + A, + B, + C, +} + +fn match_like() { + let opt: Option<u8> = Some(1); + loop { + //~^ ERROR: infinite loop detected + match opt { + Some(v) => { + println!("{v}"); + }, + None => { + do_something(); + }, + } + } + + loop { + match opt { + Some(v) => { + println!("{v}"); + }, + None => { + do_something(); + break; + }, + } + } + + let result: Result<u8, u16> = Ok(1); + loop { + let _val = match result { + Ok(1) => 1 + 1, + Ok(v) => v / 2, + Err(_) => return, + }; + } + + loop { + let Ok(_val) = result else { return }; + } + + loop { + let Ok(_val) = result.map(|v| 10) else { break }; + } + + loop { + //~^ ERROR: infinite loop detected + let _x = matches!(result, Ok(v) if v != 0).then_some(0); + } + + loop { + //~^ ERROR: infinite loop detected + // This `return` does not return the function, so it doesn't count + let _x = matches!(result, Ok(v) if v != 0).then(|| { + if true { + return; + } + do_something(); + }); + } + + let mut val = 0; + let mut fooc = Foo::C; + + loop { + val = match fooc { + Foo::A => 0, + Foo::B => { + fooc = Foo::C; + 1 + }, + Foo::C => break, + }; + } + + loop { + val = match fooc { + Foo::A => 0, + Foo::B => 1, + Foo::C => { + break; + }, + }; + } +} + +macro_rules! set_or_ret { + ($opt:expr, $a:expr) => {{ + match $opt { + Some(val) => $a = val, + None => return, + } + }}; +} + +fn ret_in_macro(opt: Option<u8>) { + let opt: Option<u8> = Some(1); + let mut a: u8 = 0; + loop { + set_or_ret!(opt, a); + } + + let res: Result<bool, u8> = Ok(true); + loop { + match res { + Ok(true) => set_or_ret!(opt, a), + _ => do_something(), + } + } +} + +fn panic_like_macros_1() { + loop { + do_something(); + panic!(); + } +} + +fn panic_like_macros_2() { + let mut x = 0; + + loop { + do_something(); + if true { + todo!(); + } + } + loop { + do_something(); + x += 1; + assert_eq!(x, 0); + } + loop { + do_something(); + assert!(x % 2 == 0); + } + loop { + do_something(); + match Some(1) { + Some(n) => println!("{n}"), + None => unreachable!("It won't happen"), + } + } +} + +fn exit_directly(cond: bool) { + loop { + if cond { + std::process::exit(0); + } + } +} + +trait MyTrait { + fn problematic_trait_method() { + loop { + //~^ ERROR: infinite loop detected + do_something(); + } + } + fn could_be_problematic(); +} + +impl MyTrait for String { + fn could_be_problematic() { + loop { + //~^ ERROR: infinite loop detected + do_something(); + } + } +} + +fn inf_loop_in_closure() { + let _loop_forever = || { + loop { + //~^ ERROR: infinite loop detected + do_something(); + } + }; + + let _somehow_ok = || -> ! { + loop { + do_something(); + } + }; +} + +fn inf_loop_in_res() -> Result<(), i32> { + Ok(loop { + do_something() + }) +} + +fn main() {} diff --git a/src/tools/clippy/tests/ui/infinite_loops.stderr b/src/tools/clippy/tests/ui/infinite_loops.stderr new file mode 100644 index 000000000..f58b3cebb --- /dev/null +++ b/src/tools/clippy/tests/ui/infinite_loops.stderr @@ -0,0 +1,259 @@ +error: infinite loop detected + --> $DIR/infinite_loops.rs:8:5 + | +LL | / loop { +LL | | +LL | | do_something(); +LL | | } + | |_____^ + | + = note: `-D clippy::infinite-loop` implied by `-D warnings` + = help: to override `-D warnings` add `#[allow(clippy::infinite_loop)]` +help: if this is intentional, consider specifing `!` as function return + | +LL | fn no_break() -> ! { + | ++++ + +error: infinite loop detected + --> $DIR/infinite_loops.rs:15:5 + | +LL | / loop { +LL | | +LL | | loop { +LL | | +... | +LL | | do_something(); +LL | | } + | |_____^ + | +help: if this is intentional, consider specifing `!` as function return + | +LL | fn all_inf() -> ! { + | ++++ + +error: infinite loop detected + --> $DIR/infinite_loops.rs:17:9 + | +LL | / loop { +LL | | +LL | | loop { +LL | | +LL | | do_something(); +LL | | } +LL | | } + | |_________^ + | +help: if this is intentional, consider specifing `!` as function return + | +LL | fn all_inf() -> ! { + | ++++ + +error: infinite loop detected + --> $DIR/infinite_loops.rs:19:13 + | +LL | / loop { +LL | | +LL | | do_something(); +LL | | } + | |_____________^ + | +help: if this is intentional, consider specifing `!` as function return + | +LL | fn all_inf() -> ! { + | ++++ + +error: infinite loop detected + --> $DIR/infinite_loops.rs:33:5 + | +LL | / loop { +LL | | +LL | | do_something(); +LL | | } + | |_____^ + | + = help: if this is not intended, try adding a `break` or `return` condition in the loop + +error: infinite loop detected + --> $DIR/infinite_loops.rs:46:5 + | +LL | / loop { +LL | | fn inner_fn() -> ! { +LL | | std::process::exit(0); +LL | | } +LL | | do_something(); +LL | | } + | |_____^ + | +help: if this is intentional, consider specifing `!` as function return + | +LL | fn no_break_never_ret_noise() -> ! { + | ++++ + +error: infinite loop detected + --> $DIR/infinite_loops.rs:89:5 + | +LL | / loop { +LL | | +LL | | loop { +LL | | if cond { +... | +LL | | } +LL | | } + | |_____^ + | +help: if this is intentional, consider specifing `!` as function return + | +LL | fn break_inner_but_not_outer_1(cond: bool) -> ! { + | ++++ + +error: infinite loop detected + --> $DIR/infinite_loops.rs:100:5 + | +LL | / loop { +LL | | +LL | | 'inner: loop { +LL | | loop { +... | +LL | | } +LL | | } + | |_____^ + | +help: if this is intentional, consider specifing `!` as function return + | +LL | fn break_inner_but_not_outer_2(cond: bool) -> ! { + | ++++ + +error: infinite loop detected + --> $DIR/infinite_loops.rs:114:9 + | +LL | / loop { +LL | | +LL | | do_something(); +LL | | } + | |_________^ + | +help: if this is intentional, consider specifing `!` as function return + | +LL | fn break_outer_but_not_inner() -> ! { + | ++++ + +error: infinite loop detected + --> $DIR/infinite_loops.rs:137:9 + | +LL | / loop { +LL | | +LL | | 'inner: loop { +LL | | loop { +... | +LL | | } +LL | | } + | |_________^ + | +help: if this is intentional, consider specifing `!` as function return + | +LL | fn break_wrong_loop(cond: bool) -> ! { + | ++++ + +error: infinite loop detected + --> $DIR/infinite_loops.rs:177:5 + | +LL | / loop { +LL | | +LL | | match opt { +LL | | Some(v) => { +... | +LL | | } +LL | | } + | |_____^ + | +help: if this is intentional, consider specifing `!` as function return + | +LL | fn match_like() -> ! { + | ++++ + +error: infinite loop detected + --> $DIR/infinite_loops.rs:218:5 + | +LL | / loop { +LL | | +LL | | let _x = matches!(result, Ok(v) if v != 0).then_some(0); +LL | | } + | |_____^ + | +help: if this is intentional, consider specifing `!` as function return + | +LL | fn match_like() -> ! { + | ++++ + +error: infinite loop detected + --> $DIR/infinite_loops.rs:223:5 + | +LL | / loop { +LL | | +LL | | // This `return` does not return the function, so it doesn't count +LL | | let _x = matches!(result, Ok(v) if v != 0).then(|| { +... | +LL | | }); +LL | | } + | |_____^ + | +help: if this is intentional, consider specifing `!` as function return + | +LL | fn match_like() -> ! { + | ++++ + +error: infinite loop detected + --> $DIR/infinite_loops.rs:328:9 + | +LL | / loop { +LL | | +LL | | do_something(); +LL | | } + | |_________^ + | +help: if this is intentional, consider specifing `!` as function return + | +LL | fn problematic_trait_method() -> ! { + | ++++ + +error: infinite loop detected + --> $DIR/infinite_loops.rs:338:9 + | +LL | / loop { +LL | | +LL | | do_something(); +LL | | } + | |_________^ + | +help: if this is intentional, consider specifing `!` as function return + | +LL | fn could_be_problematic() -> ! { + | ++++ + +error: infinite loop detected + --> $DIR/infinite_loops.rs:347:9 + | +LL | / loop { +LL | | +LL | | do_something(); +LL | | } + | |_________^ + | +help: if this is intentional, consider specifing `!` as function return + | +LL | let _loop_forever = || -> ! { + | ++++ + +error: infinite loop detected + --> $DIR/infinite_loops.rs:361:8 + | +LL | Ok(loop { + | ________^ +LL | | do_something() +LL | | }) + | |_____^ + | + = help: if this is not intended, try adding a `break` or `return` condition in the loop + +error: aborting due to 17 previous errors + diff --git a/src/tools/clippy/tests/ui/inspect_for_each.stderr b/src/tools/clippy/tests/ui/inspect_for_each.stderr index 80df86ad6..8bd4fe398 100644 --- a/src/tools/clippy/tests/ui/inspect_for_each.stderr +++ b/src/tools/clippy/tests/ui/inspect_for_each.stderr @@ -14,5 +14,5 @@ LL | | }); = note: `-D clippy::inspect-for-each` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::inspect_for_each)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/issue-3145.stderr b/src/tools/clippy/tests/ui/issue-3145.stderr index d7c2c88a2..51debc9b7 100644 --- a/src/tools/clippy/tests/ui/issue-3145.stderr +++ b/src/tools/clippy/tests/ui/issue-3145.stderr @@ -4,5 +4,5 @@ error: expected `,`, found `a` LL | println!("{}" a); | ^ expected `,` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/issue_2356.stderr b/src/tools/clippy/tests/ui/issue_2356.stderr index d04b49e52..860c545c7 100644 --- a/src/tools/clippy/tests/ui/issue_2356.stderr +++ b/src/tools/clippy/tests/ui/issue_2356.stderr @@ -10,5 +10,5 @@ note: the lint level is defined here LL | #![deny(clippy::while_let_on_iterator)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/items_after_test_module/in_submodule.stderr b/src/tools/clippy/tests/ui/items_after_test_module/in_submodule.stderr index 4e9987636..30aa90d29 100644 --- a/src/tools/clippy/tests/ui/items_after_test_module/in_submodule.stderr +++ b/src/tools/clippy/tests/ui/items_after_test_module/in_submodule.stderr @@ -10,5 +10,5 @@ LL | fn in_submodule() {} = note: `-D clippy::items-after-test-module` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::items_after_test_module)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/items_after_test_module/root_module.stderr b/src/tools/clippy/tests/ui/items_after_test_module/root_module.stderr index 67bc82ebf..17b07cc32 100644 --- a/src/tools/clippy/tests/ui/items_after_test_module/root_module.stderr +++ b/src/tools/clippy/tests/ui/items_after_test_module/root_module.stderr @@ -16,5 +16,5 @@ LL | macro_rules! should_lint { = help: to override `-D warnings` add `#[allow(clippy::items_after_test_module)]` = help: move the items to before the test module was defined -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/iter_kv_map.fixed b/src/tools/clippy/tests/ui/iter_kv_map.fixed index 566a5b690..2cbf972fc 100644 --- a/src/tools/clippy/tests/ui/iter_kv_map.fixed +++ b/src/tools/clippy/tests/ui/iter_kv_map.fixed @@ -89,3 +89,46 @@ fn main() { // Don't let a mut interfere. let _ = map.clone().into_values().count(); } + +#[clippy::msrv = "1.53"] +fn msrv_1_53() { + let map: HashMap<u32, u32> = HashMap::new(); + + // Don't lint because into_iter is not supported + let _ = map.clone().into_iter().map(|(key, _)| key).collect::<Vec<_>>(); + let _ = map.clone().into_iter().map(|(key, _)| key + 2).collect::<Vec<_>>(); + + let _ = map.clone().into_iter().map(|(_, val)| val).collect::<Vec<_>>(); + let _ = map.clone().into_iter().map(|(_, val)| val + 2).collect::<Vec<_>>(); + + // Lint + let _ = map.keys().collect::<Vec<_>>(); + //~^ ERROR: iterating on a map's keys + let _ = map.values().collect::<Vec<_>>(); + //~^ ERROR: iterating on a map's values + let _ = map.values().map(|v| v + 2).collect::<Vec<_>>(); + //~^ ERROR: iterating on a map's values +} + +#[clippy::msrv = "1.54"] +fn msrv_1_54() { + // Lint all + let map: HashMap<u32, u32> = HashMap::new(); + + let _ = map.clone().into_keys().collect::<Vec<_>>(); + //~^ ERROR: iterating on a map's keys + let _ = map.clone().into_keys().map(|key| key + 2).collect::<Vec<_>>(); + //~^ ERROR: iterating on a map's keys + + let _ = map.clone().into_values().collect::<Vec<_>>(); + //~^ ERROR: iterating on a map's values + let _ = map.clone().into_values().map(|val| val + 2).collect::<Vec<_>>(); + //~^ ERROR: iterating on a map's values + + let _ = map.keys().collect::<Vec<_>>(); + //~^ ERROR: iterating on a map's keys + let _ = map.values().collect::<Vec<_>>(); + //~^ ERROR: iterating on a map's values + let _ = map.values().map(|v| v + 2).collect::<Vec<_>>(); + //~^ ERROR: iterating on a map's values +} diff --git a/src/tools/clippy/tests/ui/iter_kv_map.rs b/src/tools/clippy/tests/ui/iter_kv_map.rs index d85e501da..6a9a4267a 100644 --- a/src/tools/clippy/tests/ui/iter_kv_map.rs +++ b/src/tools/clippy/tests/ui/iter_kv_map.rs @@ -93,3 +93,46 @@ fn main() { // Don't let a mut interfere. let _ = map.clone().into_iter().map(|(_, mut val)| val).count(); } + +#[clippy::msrv = "1.53"] +fn msrv_1_53() { + let map: HashMap<u32, u32> = HashMap::new(); + + // Don't lint because into_iter is not supported + let _ = map.clone().into_iter().map(|(key, _)| key).collect::<Vec<_>>(); + let _ = map.clone().into_iter().map(|(key, _)| key + 2).collect::<Vec<_>>(); + + let _ = map.clone().into_iter().map(|(_, val)| val).collect::<Vec<_>>(); + let _ = map.clone().into_iter().map(|(_, val)| val + 2).collect::<Vec<_>>(); + + // Lint + let _ = map.iter().map(|(key, _)| key).collect::<Vec<_>>(); + //~^ ERROR: iterating on a map's keys + let _ = map.iter().map(|(_, value)| value).collect::<Vec<_>>(); + //~^ ERROR: iterating on a map's values + let _ = map.iter().map(|(_, v)| v + 2).collect::<Vec<_>>(); + //~^ ERROR: iterating on a map's values +} + +#[clippy::msrv = "1.54"] +fn msrv_1_54() { + // Lint all + let map: HashMap<u32, u32> = HashMap::new(); + + let _ = map.clone().into_iter().map(|(key, _)| key).collect::<Vec<_>>(); + //~^ ERROR: iterating on a map's keys + let _ = map.clone().into_iter().map(|(key, _)| key + 2).collect::<Vec<_>>(); + //~^ ERROR: iterating on a map's keys + + let _ = map.clone().into_iter().map(|(_, val)| val).collect::<Vec<_>>(); + //~^ ERROR: iterating on a map's values + let _ = map.clone().into_iter().map(|(_, val)| val + 2).collect::<Vec<_>>(); + //~^ ERROR: iterating on a map's values + + let _ = map.iter().map(|(key, _)| key).collect::<Vec<_>>(); + //~^ ERROR: iterating on a map's keys + let _ = map.iter().map(|(_, value)| value).collect::<Vec<_>>(); + //~^ ERROR: iterating on a map's values + let _ = map.iter().map(|(_, v)| v + 2).collect::<Vec<_>>(); + //~^ ERROR: iterating on a map's values +} diff --git a/src/tools/clippy/tests/ui/iter_kv_map.stderr b/src/tools/clippy/tests/ui/iter_kv_map.stderr index 62155b7f8..471615978 100644 --- a/src/tools/clippy/tests/ui/iter_kv_map.stderr +++ b/src/tools/clippy/tests/ui/iter_kv_map.stderr @@ -201,5 +201,65 @@ error: iterating on a map's values LL | let _ = map.clone().into_iter().map(|(_, mut val)| val).count(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `map.clone().into_values()` -error: aborting due to 28 previous errors +error: iterating on a map's keys + --> $DIR/iter_kv_map.rs:109:13 + | +LL | let _ = map.iter().map(|(key, _)| key).collect::<Vec<_>>(); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `map.keys()` + +error: iterating on a map's values + --> $DIR/iter_kv_map.rs:111:13 + | +LL | let _ = map.iter().map(|(_, value)| value).collect::<Vec<_>>(); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `map.values()` + +error: iterating on a map's values + --> $DIR/iter_kv_map.rs:113:13 + | +LL | let _ = map.iter().map(|(_, v)| v + 2).collect::<Vec<_>>(); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `map.values().map(|v| v + 2)` + +error: iterating on a map's keys + --> $DIR/iter_kv_map.rs:122:13 + | +LL | let _ = map.clone().into_iter().map(|(key, _)| key).collect::<Vec<_>>(); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `map.clone().into_keys()` + +error: iterating on a map's keys + --> $DIR/iter_kv_map.rs:124:13 + | +LL | let _ = map.clone().into_iter().map(|(key, _)| key + 2).collect::<Vec<_>>(); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `map.clone().into_keys().map(|key| key + 2)` + +error: iterating on a map's values + --> $DIR/iter_kv_map.rs:127:13 + | +LL | let _ = map.clone().into_iter().map(|(_, val)| val).collect::<Vec<_>>(); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `map.clone().into_values()` + +error: iterating on a map's values + --> $DIR/iter_kv_map.rs:129:13 + | +LL | let _ = map.clone().into_iter().map(|(_, val)| val + 2).collect::<Vec<_>>(); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `map.clone().into_values().map(|val| val + 2)` + +error: iterating on a map's keys + --> $DIR/iter_kv_map.rs:132:13 + | +LL | let _ = map.iter().map(|(key, _)| key).collect::<Vec<_>>(); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `map.keys()` + +error: iterating on a map's values + --> $DIR/iter_kv_map.rs:134:13 + | +LL | let _ = map.iter().map(|(_, value)| value).collect::<Vec<_>>(); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `map.values()` + +error: iterating on a map's values + --> $DIR/iter_kv_map.rs:136:13 + | +LL | let _ = map.iter().map(|(_, v)| v + 2).collect::<Vec<_>>(); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `map.values().map(|v| v + 2)` + +error: aborting due to 38 previous errors diff --git a/src/tools/clippy/tests/ui/iter_next_loop.stderr b/src/tools/clippy/tests/ui/iter_next_loop.stderr index 5bba0e635..5871d21e4 100644 --- a/src/tools/clippy/tests/ui/iter_next_loop.stderr +++ b/src/tools/clippy/tests/ui/iter_next_loop.stderr @@ -4,6 +4,6 @@ error[E0423]: expected value, found macro `vec` LL | for _ in vec.iter().next() {} | ^^^ not a value -error: aborting due to previous error +error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0423`. diff --git a/src/tools/clippy/tests/ui/iter_over_hash_type.rs b/src/tools/clippy/tests/ui/iter_over_hash_type.rs new file mode 100644 index 000000000..7000c8bf9 --- /dev/null +++ b/src/tools/clippy/tests/ui/iter_over_hash_type.rs @@ -0,0 +1,74 @@ +//@aux-build:proc_macros.rs +#![feature(rustc_private)] +#![warn(clippy::iter_over_hash_type)] +use std::collections::{HashMap, HashSet}; + +extern crate rustc_data_structures; + +extern crate proc_macros; + +fn main() { + let mut hash_set = HashSet::<i32>::new(); + let mut hash_map = HashMap::<i32, i32>::new(); + let mut fx_hash_map = rustc_data_structures::fx::FxHashMap::<i32, i32>::default(); + let mut fx_hash_set = rustc_data_structures::fx::FxHashMap::<i32, i32>::default(); + let vec = Vec::<i32>::new(); + + // test hashset + for x in &hash_set { + let _ = x; + } + for x in hash_set.iter() { + let _ = x; + } + for x in hash_set.clone() { + let _ = x; + } + for x in hash_set.drain() { + let _ = x; + } + + // test hashmap + for (x, y) in &hash_map { + let _ = (x, y); + } + for x in hash_map.keys() { + let _ = x; + } + for x in hash_map.values() { + let _ = x; + } + for x in hash_map.values_mut() { + *x += 1; + } + for x in hash_map.iter() { + let _ = x; + } + for x in hash_map.clone() { + let _ = x; + } + for x in hash_map.drain() { + let _ = x; + } + + // test type-aliased hashers + for x in fx_hash_set { + let _ = x; + } + for x in fx_hash_map { + let _ = x; + } + + // shouldnt fire + for x in &vec { + let _ = x; + } + for x in vec { + let _ = x; + } + + // should not lint, this comes from an external crate + proc_macros::external! { + for _ in HashMap::<i32, i32>::new() {} + } +} diff --git a/src/tools/clippy/tests/ui/iter_over_hash_type.stderr b/src/tools/clippy/tests/ui/iter_over_hash_type.stderr new file mode 100644 index 000000000..cf420fb8e --- /dev/null +++ b/src/tools/clippy/tests/ui/iter_over_hash_type.stderr @@ -0,0 +1,109 @@ +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:18:5 + | +LL | / for x in &hash_set { +LL | | let _ = x; +LL | | } + | |_____^ + | + = note: `-D clippy::iter-over-hash-type` implied by `-D warnings` + = help: to override `-D warnings` add `#[allow(clippy::iter_over_hash_type)]` + +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:21:5 + | +LL | / for x in hash_set.iter() { +LL | | let _ = x; +LL | | } + | |_____^ + +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:24:5 + | +LL | / for x in hash_set.clone() { +LL | | let _ = x; +LL | | } + | |_____^ + +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:27:5 + | +LL | / for x in hash_set.drain() { +LL | | let _ = x; +LL | | } + | |_____^ + +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:32:5 + | +LL | / for (x, y) in &hash_map { +LL | | let _ = (x, y); +LL | | } + | |_____^ + +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:35:5 + | +LL | / for x in hash_map.keys() { +LL | | let _ = x; +LL | | } + | |_____^ + +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:38:5 + | +LL | / for x in hash_map.values() { +LL | | let _ = x; +LL | | } + | |_____^ + +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:41:5 + | +LL | / for x in hash_map.values_mut() { +LL | | *x += 1; +LL | | } + | |_____^ + +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:44:5 + | +LL | / for x in hash_map.iter() { +LL | | let _ = x; +LL | | } + | |_____^ + +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:47:5 + | +LL | / for x in hash_map.clone() { +LL | | let _ = x; +LL | | } + | |_____^ + +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:50:5 + | +LL | / for x in hash_map.drain() { +LL | | let _ = x; +LL | | } + | |_____^ + +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:55:5 + | +LL | / for x in fx_hash_set { +LL | | let _ = x; +LL | | } + | |_____^ + +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:58:5 + | +LL | / for x in fx_hash_map { +LL | | let _ = x; +LL | | } + | |_____^ + +error: aborting due to 13 previous errors + diff --git a/src/tools/clippy/tests/ui/join_absolute_paths.rs b/src/tools/clippy/tests/ui/join_absolute_paths.rs new file mode 100644 index 000000000..efa77a049 --- /dev/null +++ b/src/tools/clippy/tests/ui/join_absolute_paths.rs @@ -0,0 +1,30 @@ +//@no-rustfix + +#![allow(clippy::needless_raw_string_hashes)] +#![warn(clippy::join_absolute_paths)] + +use std::path::{Path, PathBuf}; + +fn main() { + let path = Path::new("/bin"); + path.join("/sh"); + //~^ ERROR: argument to `Path::join` starts with a path separator + + let path = Path::new("C:\\Users"); + path.join("\\user"); + //~^ ERROR: argument to `Path::join` starts with a path separator + + let path = PathBuf::from("/bin"); + path.join("/sh"); + //~^ ERROR: argument to `Path::join` starts with a path separator + + let path = PathBuf::from("/bin"); + path.join(r#"/sh"#); + //~^ ERROR: argument to `Path::join` starts with a path separator + + let path: &[&str] = &["/bin"]; + path.join("/sh"); + + let path = Path::new("/bin"); + path.join("sh"); +} diff --git a/src/tools/clippy/tests/ui/join_absolute_paths.stderr b/src/tools/clippy/tests/ui/join_absolute_paths.stderr new file mode 100644 index 000000000..0c2f89d99 --- /dev/null +++ b/src/tools/clippy/tests/ui/join_absolute_paths.stderr @@ -0,0 +1,68 @@ +error: argument to `Path::join` starts with a path separator + --> $DIR/join_absolute_paths.rs:10:15 + | +LL | path.join("/sh"); + | ^^^^^ + | + = note: joining a path starting with separator will replace the path instead + = note: `-D clippy::join-absolute-paths` implied by `-D warnings` + = help: to override `-D warnings` add `#[allow(clippy::join_absolute_paths)]` +help: if this is unintentional, try removing the starting separator + | +LL | path.join("sh"); + | ~~~~ +help: if this is intentional, try using `Path::new` instead + | +LL | PathBuf::from("/sh"); + | ~~~~~~~~~~~~~~~~~~~~ + +error: argument to `Path::join` starts with a path separator + --> $DIR/join_absolute_paths.rs:14:15 + | +LL | path.join("\\user"); + | ^^^^^^^^ + | + = note: joining a path starting with separator will replace the path instead +help: if this is unintentional, try removing the starting separator + | +LL | path.join("\user"); + | ~~~~~~~ +help: if this is intentional, try using `Path::new` instead + | +LL | PathBuf::from("\\user"); + | ~~~~~~~~~~~~~~~~~~~~~~~ + +error: argument to `Path::join` starts with a path separator + --> $DIR/join_absolute_paths.rs:18:15 + | +LL | path.join("/sh"); + | ^^^^^ + | + = note: joining a path starting with separator will replace the path instead +help: if this is unintentional, try removing the starting separator + | +LL | path.join("sh"); + | ~~~~ +help: if this is intentional, try using `Path::new` instead + | +LL | PathBuf::from("/sh"); + | ~~~~~~~~~~~~~~~~~~~~ + +error: argument to `Path::join` starts with a path separator + --> $DIR/join_absolute_paths.rs:22:15 + | +LL | path.join(r#"/sh"#); + | ^^^^^^^^ + | + = note: joining a path starting with separator will replace the path instead +help: if this is unintentional, try removing the starting separator + | +LL | path.join(r#"sh"#); + | ~~~~~~~ +help: if this is intentional, try using `Path::new` instead + | +LL | PathBuf::from(r#"/sh"#); + | ~~~~~~~~~~~~~~~~~~~~~~~ + +error: aborting due to 4 previous errors + diff --git a/src/tools/clippy/tests/ui/lines_filter_map_ok.fixed b/src/tools/clippy/tests/ui/lines_filter_map_ok.fixed index 74ef6f729..621115cc1 100644 --- a/src/tools/clippy/tests/ui/lines_filter_map_ok.fixed +++ b/src/tools/clippy/tests/ui/lines_filter_map_ok.fixed @@ -10,11 +10,17 @@ fn main() -> io::Result<()> { // Lint let f = std::fs::File::open("/")?; BufReader::new(f).lines().map_while(Result::ok).for_each(|_| ()); + // Lint + let f = std::fs::File::open("/")?; + BufReader::new(f).lines().map_while(Result::ok).for_each(|_| ()); + let s = "foo\nbar\nbaz\n"; // Lint io::stdin().lines().map_while(Result::ok).for_each(|_| ()); // Lint io::stdin().lines().map_while(Result::ok).for_each(|_| ()); + // Lint + io::stdin().lines().map_while(Result::ok).for_each(|_| ()); // Do not lint (not a `Lines` iterator) io::stdin() .lines() diff --git a/src/tools/clippy/tests/ui/lines_filter_map_ok.rs b/src/tools/clippy/tests/ui/lines_filter_map_ok.rs index 345f4dc5f..a86efbd66 100644 --- a/src/tools/clippy/tests/ui/lines_filter_map_ok.rs +++ b/src/tools/clippy/tests/ui/lines_filter_map_ok.rs @@ -10,11 +10,17 @@ fn main() -> io::Result<()> { // Lint let f = std::fs::File::open("/")?; BufReader::new(f).lines().flat_map(Result::ok).for_each(|_| ()); + // Lint + let f = std::fs::File::open("/")?; + BufReader::new(f).lines().flatten().for_each(|_| ()); + let s = "foo\nbar\nbaz\n"; // Lint io::stdin().lines().filter_map(Result::ok).for_each(|_| ()); // Lint io::stdin().lines().filter_map(|x| x.ok()).for_each(|_| ()); + // Lint + io::stdin().lines().flatten().for_each(|_| ()); // Do not lint (not a `Lines` iterator) io::stdin() .lines() diff --git a/src/tools/clippy/tests/ui/lines_filter_map_ok.stderr b/src/tools/clippy/tests/ui/lines_filter_map_ok.stderr index fa2ba0a9a..9833ab164 100644 --- a/src/tools/clippy/tests/ui/lines_filter_map_ok.stderr +++ b/src/tools/clippy/tests/ui/lines_filter_map_ok.stderr @@ -24,29 +24,53 @@ note: this expression returning a `std::io::Lines` may produce an infinite numbe LL | BufReader::new(f).lines().flat_map(Result::ok).for_each(|_| ()); | ^^^^^^^^^^^^^^^^^^^^^^^^^ +error: `flatten()` will run forever if the iterator repeatedly produces an `Err` + --> $DIR/lines_filter_map_ok.rs:15:31 + | +LL | BufReader::new(f).lines().flatten().for_each(|_| ()); + | ^^^^^^^^^ help: replace with: `map_while(Result::ok)` + | +note: this expression returning a `std::io::Lines` may produce an infinite number of `Err` in case of a read error + --> $DIR/lines_filter_map_ok.rs:15:5 + | +LL | BufReader::new(f).lines().flatten().for_each(|_| ()); + | ^^^^^^^^^^^^^^^^^^^^^^^^^ + error: `filter_map()` will run forever if the iterator repeatedly produces an `Err` - --> $DIR/lines_filter_map_ok.rs:15:25 + --> $DIR/lines_filter_map_ok.rs:19:25 | LL | io::stdin().lines().filter_map(Result::ok).for_each(|_| ()); | ^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `map_while(Result::ok)` | note: this expression returning a `std::io::Lines` may produce an infinite number of `Err` in case of a read error - --> $DIR/lines_filter_map_ok.rs:15:5 + --> $DIR/lines_filter_map_ok.rs:19:5 | LL | io::stdin().lines().filter_map(Result::ok).for_each(|_| ()); | ^^^^^^^^^^^^^^^^^^^ error: `filter_map()` will run forever if the iterator repeatedly produces an `Err` - --> $DIR/lines_filter_map_ok.rs:17:25 + --> $DIR/lines_filter_map_ok.rs:21:25 | LL | io::stdin().lines().filter_map(|x| x.ok()).for_each(|_| ()); | ^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `map_while(Result::ok)` | note: this expression returning a `std::io::Lines` may produce an infinite number of `Err` in case of a read error - --> $DIR/lines_filter_map_ok.rs:17:5 + --> $DIR/lines_filter_map_ok.rs:21:5 | LL | io::stdin().lines().filter_map(|x| x.ok()).for_each(|_| ()); | ^^^^^^^^^^^^^^^^^^^ -error: aborting due to 4 previous errors +error: `flatten()` will run forever if the iterator repeatedly produces an `Err` + --> $DIR/lines_filter_map_ok.rs:23:25 + | +LL | io::stdin().lines().flatten().for_each(|_| ()); + | ^^^^^^^^^ help: replace with: `map_while(Result::ok)` + | +note: this expression returning a `std::io::Lines` may produce an infinite number of `Err` in case of a read error + --> $DIR/lines_filter_map_ok.rs:23:5 + | +LL | io::stdin().lines().flatten().for_each(|_| ()); + | ^^^^^^^^^^^^^^^^^^^ + +error: aborting due to 6 previous errors diff --git a/src/tools/clippy/tests/ui/macro_use_imports.stderr b/src/tools/clippy/tests/ui/macro_use_imports.stderr index 6de869699..5524e7e56 100644 --- a/src/tools/clippy/tests/ui/macro_use_imports.stderr +++ b/src/tools/clippy/tests/ui/macro_use_imports.stderr @@ -1,8 +1,8 @@ error: `macro_use` attributes are no longer needed in the Rust 2018 edition - --> $DIR/macro_use_imports.rs:25:5 + --> $DIR/macro_use_imports.rs:19:5 | LL | #[macro_use] - | ^^^^^^^^^^^^ help: remove the attribute and import the macro directly, try: `use mac::inner::nested::string_add;` + | ^^^^^^^^^^^^ help: remove the attribute and import the macro directly, try: `use mac::{pub_macro, inner_mod_macro, function_macro, ty_macro, pub_in_private_macro};` | = note: `-D clippy::macro-use-imports` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::macro_use_imports)]` @@ -14,16 +14,16 @@ LL | #[macro_use] | ^^^^^^^^^^^^ help: remove the attribute and import the macro directly, try: `use mac::{inner::mut_mut, inner::try_err};` error: `macro_use` attributes are no longer needed in the Rust 2018 edition - --> $DIR/macro_use_imports.rs:21:5 + --> $DIR/macro_use_imports.rs:25:5 | LL | #[macro_use] - | ^^^^^^^^^^^^ help: remove the attribute and import the macro directly, try: `use mini_mac::ClippyMiniMacroTest;` + | ^^^^^^^^^^^^ help: remove the attribute and import the macro directly, try: `use mac::inner::nested::string_add;` error: `macro_use` attributes are no longer needed in the Rust 2018 edition - --> $DIR/macro_use_imports.rs:19:5 + --> $DIR/macro_use_imports.rs:21:5 | LL | #[macro_use] - | ^^^^^^^^^^^^ help: remove the attribute and import the macro directly, try: `use mac::{pub_macro, inner_mod_macro, function_macro, ty_macro, pub_in_private_macro};` + | ^^^^^^^^^^^^ help: remove the attribute and import the macro directly, try: `use mini_mac::ClippyMiniMacroTest;` error: aborting due to 4 previous errors diff --git a/src/tools/clippy/tests/ui/manual_filter.fixed b/src/tools/clippy/tests/ui/manual_filter.fixed index c1bc4aae9..a0fb0e32d 100644 --- a/src/tools/clippy/tests/ui/manual_filter.fixed +++ b/src/tools/clippy/tests/ui/manual_filter.fixed @@ -40,7 +40,7 @@ fn main() { }; } - #[allow(clippy::blocks_in_if_conditions)] + #[allow(clippy::blocks_in_conditions)] Some(11).filter(|&x| { println!("foo"); x > 10 && x < 100 diff --git a/src/tools/clippy/tests/ui/manual_filter.rs b/src/tools/clippy/tests/ui/manual_filter.rs index ee44909f3..0ac6cbefc 100644 --- a/src/tools/clippy/tests/ui/manual_filter.rs +++ b/src/tools/clippy/tests/ui/manual_filter.rs @@ -135,7 +135,7 @@ fn main() { }; } - #[allow(clippy::blocks_in_if_conditions)] + #[allow(clippy::blocks_in_conditions)] match Some(11) { // Lint, statement is preserved by `.filter` Some(x) => { diff --git a/src/tools/clippy/tests/ui/manual_let_else.rs b/src/tools/clippy/tests/ui/manual_let_else.rs index 27717ab3a..5d94660ec 100644 --- a/src/tools/clippy/tests/ui/manual_let_else.rs +++ b/src/tools/clippy/tests/ui/manual_let_else.rs @@ -5,7 +5,9 @@ clippy::let_unit_value, clippy::match_single_binding, clippy::never_loop, - clippy::needless_if + clippy::needless_if, + clippy::diverging_sub_expression, + clippy::single_match )] #![warn(clippy::manual_let_else)] //@no-rustfix @@ -24,7 +26,7 @@ fn main() {} fn fire() { let v = if let Some(v_some) = g() { v_some } else { return }; //~^ ERROR: this could be rewritten as `let...else` - //~| NOTE: `-D clippy::manual-let-else` implied by `-D warnings` + let v = if let Some(v_some) = g() { //~^ ERROR: this could be rewritten as `let...else` v_some @@ -79,22 +81,76 @@ fn fire() { panic!(); }; + // The final expression will need to be turned into a statement. + let v = if let Some(v_some) = g() { + //~^ ERROR: this could be rewritten as `let...else` + v_some + } else { + panic!(); + () + }; + + // Even if the result is buried multiple expressions deep. + let v = if let Some(v_some) = g() { + //~^ ERROR: this could be rewritten as `let...else` + v_some + } else { + panic!(); + if true { + match 0 { + 0 => (), + _ => (), + } + } else { + panic!() + } + }; + + // Or if a break gives the value. + let v = if let Some(v_some) = g() { + //~^ ERROR: this could be rewritten as `let...else` + v_some + } else { + loop { + panic!(); + break (); + } + }; + + // Even if the break is in a weird position. + let v = if let Some(v_some) = g() { + //~^ ERROR: this could be rewritten as `let...else` + v_some + } else { + 'a: loop { + panic!(); + loop { + match 0 { + 0 if (return break 'a ()) => {}, + _ => {}, + } + } + } + }; + // A match diverges if all branches diverge: - // Note: the corresponding let-else requires a ; at the end of the match - // as otherwise the type checker does not turn it into a ! type. let v = if let Some(v_some) = g() { //~^ ERROR: this could be rewritten as `let...else` v_some } else { - match () { - _ if panic!() => {}, + match 0 { + 0 if true => panic!(), _ => panic!(), - } + }; }; // An if's expression can cause divergence: - let v = if let Some(v_some) = g() { v_some } else { if panic!() {} }; - //~^ ERROR: this could be rewritten as `let...else` + let v = if let Some(v_some) = g() { + //~^ ERROR: this could be rewritten as `let...else` + v_some + } else { + if panic!() {}; + }; // An expression of a match can cause divergence: let v = if let Some(v_some) = g() { @@ -103,7 +159,7 @@ fn fire() { } else { match panic!() { _ => {}, - } + }; }; // Top level else if @@ -342,6 +398,43 @@ fn not_fire() { } else { return; }; + + // A break that skips the divergent statement will cause the expression to be non-divergent. + let _x = if let Some(x) = Some(0) { + x + } else { + 'foo: loop { + break 'foo 0; + panic!(); + } + }; + + // Even in inner loops. + let _x = if let Some(x) = Some(0) { + x + } else { + 'foo: { + loop { + break 'foo 0; + } + panic!(); + } + }; + + // But a break that can't ever be reached still affects divergence checking. + let _x = if let Some(x) = g() { + x + } else { + 'foo: { + 'bar: loop { + loop { + break 'bar (); + } + break 'foo (); + } + panic!(); + }; + }; } struct S<T> { diff --git a/src/tools/clippy/tests/ui/manual_let_else.stderr b/src/tools/clippy/tests/ui/manual_let_else.stderr index 2b6504a18..3beaf766e 100644 --- a/src/tools/clippy/tests/ui/manual_let_else.stderr +++ b/src/tools/clippy/tests/ui/manual_let_else.stderr @@ -1,5 +1,5 @@ error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:25:5 + --> $DIR/manual_let_else.rs:27:5 | LL | let v = if let Some(v_some) = g() { v_some } else { return }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider writing: `let Some(v) = g() else { return };` @@ -8,7 +8,7 @@ LL | let v = if let Some(v_some) = g() { v_some } else { return }; = help: to override `-D warnings` add `#[allow(clippy::manual_let_else)]` error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:28:5 + --> $DIR/manual_let_else.rs:30:5 | LL | / let v = if let Some(v_some) = g() { LL | | @@ -26,7 +26,7 @@ LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:35:5 + --> $DIR/manual_let_else.rs:37:5 | LL | / let v = if let Some(v) = g() { LL | | @@ -47,25 +47,25 @@ LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:47:9 + --> $DIR/manual_let_else.rs:49:9 | LL | let v = if let Some(v_some) = g() { v_some } else { continue }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider writing: `let Some(v) = g() else { continue };` error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:49:9 + --> $DIR/manual_let_else.rs:51:9 | LL | let v = if let Some(v_some) = g() { v_some } else { break }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider writing: `let Some(v) = g() else { break };` error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:54:5 + --> $DIR/manual_let_else.rs:56:5 | LL | let v = if let Some(v_some) = g() { v_some } else { panic!() }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider writing: `let Some(v) = g() else { panic!() };` error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:58:5 + --> $DIR/manual_let_else.rs:60:5 | LL | / let v = if let Some(v_some) = g() { LL | | @@ -83,7 +83,7 @@ LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:66:5 + --> $DIR/manual_let_else.rs:68:5 | LL | / let v = if let Some(v_some) = g() { LL | | @@ -101,7 +101,7 @@ LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:74:5 + --> $DIR/manual_let_else.rs:76:5 | LL | / let v = if let Some(v_some) = g() { LL | | @@ -127,6 +127,26 @@ LL | / let v = if let Some(v_some) = g() { LL | | LL | | v_some LL | | } else { +LL | | panic!(); +LL | | () +LL | | }; + | |______^ + | +help: consider writing + | +LL ~ let Some(v) = g() else { +LL + panic!(); +LL + () +LL + }; + | + +error: this could be rewritten as `let...else` + --> $DIR/manual_let_else.rs:94:5 + | +LL | / let v = if let Some(v_some) = g() { +LL | | +LL | | v_some +LL | | } else { ... | LL | | } LL | | }; @@ -135,21 +155,42 @@ LL | | }; help: consider writing | LL ~ let Some(v) = g() else { -LL + match () { -LL + _ if panic!() => {}, -LL + _ => panic!(), +LL + panic!(); +LL + if true { +LL + match 0 { +LL + 0 => (), +LL + _ => (), +LL + } +LL + } else { +LL + panic!() LL + } LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:96:5 + --> $DIR/manual_let_else.rs:110:5 + | +LL | / let v = if let Some(v_some) = g() { +LL | | +LL | | v_some +LL | | } else { +... | +LL | | } +LL | | }; + | |______^ + | +help: consider writing + | +LL ~ let Some(v) = g() else { +LL + loop { +LL + panic!(); +LL + break (); +LL + } +LL + }; | -LL | let v = if let Some(v_some) = g() { v_some } else { if panic!() {} }; - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider writing: `let Some(v) = g() else { if panic!() {} };` error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:100:5 + --> $DIR/manual_let_else.rs:121:5 | LL | / let v = if let Some(v_some) = g() { LL | | @@ -163,14 +204,81 @@ LL | | }; help: consider writing | LL ~ let Some(v) = g() else { +LL + 'a: loop { +LL + panic!(); +LL + loop { +LL + match 0 { +LL + 0 if (return break 'a ()) => {}, +LL + _ => {}, +LL + } +LL + } +LL + } +LL + }; + | + +error: this could be rewritten as `let...else` + --> $DIR/manual_let_else.rs:137:5 + | +LL | / let v = if let Some(v_some) = g() { +LL | | +LL | | v_some +LL | | } else { +... | +LL | | }; +LL | | }; + | |______^ + | +help: consider writing + | +LL ~ let Some(v) = g() else { +LL + match 0 { +LL + 0 if true => panic!(), +LL + _ => panic!(), +LL + }; +LL + }; + | + +error: this could be rewritten as `let...else` + --> $DIR/manual_let_else.rs:148:5 + | +LL | / let v = if let Some(v_some) = g() { +LL | | +LL | | v_some +LL | | } else { +LL | | if panic!() {}; +LL | | }; + | |______^ + | +help: consider writing + | +LL ~ let Some(v) = g() else { +LL + if panic!() {}; +LL + }; + | + +error: this could be rewritten as `let...else` + --> $DIR/manual_let_else.rs:156:5 + | +LL | / let v = if let Some(v_some) = g() { +LL | | +LL | | v_some +LL | | } else { +... | +LL | | }; +LL | | }; + | |______^ + | +help: consider writing + | +LL ~ let Some(v) = g() else { LL + match panic!() { LL + _ => {}, -LL + } +LL + }; LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:110:5 + --> $DIR/manual_let_else.rs:166:5 | LL | / let v = if let Some(v_some) = g() { LL | | @@ -191,7 +299,7 @@ LL + } }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:120:5 + --> $DIR/manual_let_else.rs:176:5 | LL | / let v = if let Some(v_some) = g() { LL | | @@ -220,7 +328,7 @@ LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:138:5 + --> $DIR/manual_let_else.rs:194:5 | LL | / let (v, w) = if let Some(v_some) = g().map(|v| (v, 42)) { LL | | @@ -238,7 +346,7 @@ LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:146:5 + --> $DIR/manual_let_else.rs:202:5 | LL | / let (w, S { v }) = if let (Some(v_some), w_some) = (g().map(|_| S { v: 0 }), 0) { LL | | @@ -256,7 +364,7 @@ LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:156:13 + --> $DIR/manual_let_else.rs:212:13 | LL | let $n = if let Some(v) = $e { v } else { return }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider writing: `let Some($n) = g() else { return };` @@ -267,19 +375,19 @@ LL | create_binding_if_some!(w, g()); = note: this error originates in the macro `create_binding_if_some` (in Nightly builds, run with -Z macro-backtrace for more info) error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:165:5 + --> $DIR/manual_let_else.rs:221:5 | LL | let v = if let Variant::A(a, 0) = e() { a } else { return }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider writing: `let Variant::A(v, 0) = e() else { return };` error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:169:5 + --> $DIR/manual_let_else.rs:225:5 | LL | let mut v = if let Variant::B(b) = e() { b } else { return }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider writing: `let Variant::B(mut v) = e() else { return };` error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:174:5 + --> $DIR/manual_let_else.rs:230:5 | LL | / let v = if let Ok(Some(Variant::B(b))) | Err(Some(Variant::A(b, _))) = nested { LL | | @@ -297,19 +405,19 @@ LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:181:5 + --> $DIR/manual_let_else.rs:237:5 | LL | let v = if let Variant::A(.., a) = e() { a } else { return }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider writing: `let Variant::A(.., v) = e() else { return };` error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:185:5 + --> $DIR/manual_let_else.rs:241:5 | LL | let w = if let (Some(v), ()) = (g(), ()) { v } else { return }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider writing: `let (Some(w), ()) = (g(), ()) else { return };` error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:189:5 + --> $DIR/manual_let_else.rs:245:5 | LL | / let w = if let Some(S { v: x }) = Some(S { v: 0 }) { LL | | @@ -327,7 +435,7 @@ LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:197:5 + --> $DIR/manual_let_else.rs:253:5 | LL | / let v = if let Some(S { v: x }) = Some(S { v: 0 }) { LL | | @@ -345,7 +453,7 @@ LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:205:5 + --> $DIR/manual_let_else.rs:261:5 | LL | / let (x, S { v }, w) = if let Some(U { v, w, x }) = None::<U<S<()>>> { LL | | @@ -363,7 +471,7 @@ LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:322:5 + --> $DIR/manual_let_else.rs:378:5 | LL | / let _ = match ff { LL | | @@ -372,5 +480,5 @@ LL | | _ => macro_call!(), LL | | }; | |______^ help: consider writing: `let Some(_) = ff else { macro_call!() };` -error: aborting due to 26 previous errors +error: aborting due to 30 previous errors diff --git a/src/tools/clippy/tests/ui/manual_memcpy/without_loop_counters.rs b/src/tools/clippy/tests/ui/manual_memcpy/without_loop_counters.rs index a224001a3..8146091a2 100644 --- a/src/tools/clippy/tests/ui/manual_memcpy/without_loop_counters.rs +++ b/src/tools/clippy/tests/ui/manual_memcpy/without_loop_counters.rs @@ -138,6 +138,26 @@ pub fn manual_copy(src: &[i32], dst: &mut [i32], dst2: &mut [i32]) { for i in 0..dst.len() { dst[i] = src[i]; } + + // Range is equal to array length + let src = [0, 1, 2, 3, 4]; + let mut dst = [0; 4]; + for i in 0..4 { + //~^ ERROR: it looks like you're manually copying between slices + dst[i] = src[i]; + } + + let mut dst = [0; 6]; + for i in 0..5 { + //~^ ERROR: it looks like you're manually copying between slices + dst[i] = src[i]; + } + + let mut dst = [0; 5]; + for i in 0..5 { + //~^ ERROR: it looks like you're manually copying between slices + dst[i] = src[i]; + } } #[warn(clippy::needless_range_loop, clippy::manual_memcpy)] diff --git a/src/tools/clippy/tests/ui/manual_memcpy/without_loop_counters.stderr b/src/tools/clippy/tests/ui/manual_memcpy/without_loop_counters.stderr index b9dbda6ed..4b5cd274d 100644 --- a/src/tools/clippy/tests/ui/manual_memcpy/without_loop_counters.stderr +++ b/src/tools/clippy/tests/ui/manual_memcpy/without_loop_counters.stderr @@ -106,7 +106,7 @@ LL | / for i in 0..5 { LL | | LL | | dst[i - 0] = src[i]; LL | | } - | |_____^ help: try replacing the loop by: `dst[..5].copy_from_slice(&src[..5]);` + | |_____^ help: try replacing the loop by: `dst[..5].copy_from_slice(&src);` error: it looks like you're manually copying between slices --> $DIR/without_loop_counters.rs:121:5 @@ -120,11 +120,38 @@ LL | | } error: it looks like you're manually copying between slices --> $DIR/without_loop_counters.rs:145:5 | +LL | / for i in 0..4 { +LL | | +LL | | dst[i] = src[i]; +LL | | } + | |_____^ help: try replacing the loop by: `dst.copy_from_slice(&src[..4]);` + +error: it looks like you're manually copying between slices + --> $DIR/without_loop_counters.rs:151:5 + | +LL | / for i in 0..5 { +LL | | +LL | | dst[i] = src[i]; +LL | | } + | |_____^ help: try replacing the loop by: `dst[..5].copy_from_slice(&src);` + +error: it looks like you're manually copying between slices + --> $DIR/without_loop_counters.rs:157:5 + | +LL | / for i in 0..5 { +LL | | +LL | | dst[i] = src[i]; +LL | | } + | |_____^ help: try replacing the loop by: `dst.copy_from_slice(&src);` + +error: it looks like you're manually copying between slices + --> $DIR/without_loop_counters.rs:165:5 + | LL | / for i in 0..src.len() { LL | | LL | | dst[i] = src[i].clone(); LL | | } | |_____^ help: try replacing the loop by: `dst[..src.len()].clone_from_slice(&src[..]);` -error: aborting due to 13 previous errors +error: aborting due to 16 previous errors diff --git a/src/tools/clippy/tests/ui/manual_non_exhaustive_enum.rs b/src/tools/clippy/tests/ui/manual_non_exhaustive_enum.rs index e32ba8631..eb3875320 100644 --- a/src/tools/clippy/tests/ui/manual_non_exhaustive_enum.rs +++ b/src/tools/clippy/tests/ui/manual_non_exhaustive_enum.rs @@ -26,7 +26,7 @@ enum NoDocHidden { _C, } -// name of variant with doc hidden does not start with underscore, should be ignored +// name of variant with doc hidden does not start with underscore enum NoUnderscore { A, B, diff --git a/src/tools/clippy/tests/ui/manual_non_exhaustive_enum.stderr b/src/tools/clippy/tests/ui/manual_non_exhaustive_enum.stderr index 7361a4a2c..c4b13a577 100644 --- a/src/tools/clippy/tests/ui/manual_non_exhaustive_enum.stderr +++ b/src/tools/clippy/tests/ui/manual_non_exhaustive_enum.stderr @@ -22,5 +22,26 @@ LL | _C, = note: `-D clippy::manual-non-exhaustive` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::manual_non_exhaustive)]` -error: aborting due to previous error +error: this seems like a manual implementation of the non-exhaustive pattern + --> $DIR/manual_non_exhaustive_enum.rs:30:1 + | +LL | enum NoUnderscore { + | ^---------------- + | | + | _help: add the attribute: `#[non_exhaustive] enum NoUnderscore` + | | +LL | | A, +LL | | B, +LL | | #[doc(hidden)] +LL | | C, +LL | | } + | |_^ + | +help: remove this variant + --> $DIR/manual_non_exhaustive_enum.rs:34:5 + | +LL | C, + | ^ + +error: aborting due to 2 previous errors diff --git a/src/tools/clippy/tests/ui/manual_non_exhaustive_struct.stderr b/src/tools/clippy/tests/ui/manual_non_exhaustive_struct.stderr index 028b8ff76..0b88b1969 100644 --- a/src/tools/clippy/tests/ui/manual_non_exhaustive_struct.stderr +++ b/src/tools/clippy/tests/ui/manual_non_exhaustive_struct.stderr @@ -39,6 +39,26 @@ LL | _c: (), | ^^^^^^ error: this seems like a manual implementation of the non-exhaustive pattern + --> $DIR/manual_non_exhaustive_struct.rs:29:5 + | +LL | struct NoUnderscore { + | ^------------------ + | | + | _____help: add the attribute: `#[non_exhaustive] struct NoUnderscore` + | | +LL | | pub a: i32, +LL | | pub b: i32, +LL | | c: (), +LL | | } + | |_____^ + | +help: remove this field + --> $DIR/manual_non_exhaustive_struct.rs:32:9 + | +LL | c: (), + | ^^^^^ + +error: this seems like a manual implementation of the non-exhaustive pattern --> $DIR/manual_non_exhaustive_struct.rs:56:5 | LL | struct T(pub i32, pub i32, ()); @@ -64,5 +84,5 @@ help: remove this field LL | struct Tp(pub i32, pub i32, ()); | ^^ -error: aborting due to 4 previous errors +error: aborting due to 5 previous errors diff --git a/src/tools/clippy/tests/ui/manual_ok_or.stderr b/src/tools/clippy/tests/ui/manual_ok_or.stderr index ddb2cf261..b277d22e5 100644 --- a/src/tools/clippy/tests/ui/manual_ok_or.stderr +++ b/src/tools/clippy/tests/ui/manual_ok_or.stderr @@ -13,6 +13,15 @@ error: this pattern reimplements `Option::ok_or` LL | foo.map_or(Err("error"), Ok); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `foo.ok_or("error")` +error: called `map_or(Err(_), Ok)` on an `Option` value + --> $DIR/manual_ok_or.rs:14:5 + | +LL | foo.map_or(Err("error"), Ok); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try using `ok_or` instead: `foo.ok_or("error")` + | + = note: `-D clippy::option-map-or-err-ok` implied by `-D warnings` + = help: to override `-D warnings` add `#[allow(clippy::option_map_or_err_ok)]` + error: this pattern reimplements `Option::ok_or` --> $DIR/manual_ok_or.rs:17:5 | @@ -38,5 +47,5 @@ LL + "{}{}{}{}{}{}{}", LL ~ "Alice", "Bob", "Sarah", "Marc", "Sandra", "Eric", "Jenifer")); | -error: aborting due to 4 previous errors +error: aborting due to 5 previous errors diff --git a/src/tools/clippy/tests/ui/manual_try_fold.rs b/src/tools/clippy/tests/ui/manual_try_fold.rs index bddf03ac3..7299d7cf9 100644 --- a/src/tools/clippy/tests/ui/manual_try_fold.rs +++ b/src/tools/clippy/tests/ui/manual_try_fold.rs @@ -96,3 +96,33 @@ fn msrv_juust_right() { .fold(Some(0i32), |sum, i| sum?.checked_add(*i)) .unwrap(); } + +mod issue11876 { + struct Foo; + + impl Bar for Foo { + type Output = u32; + } + + trait Bar: Sized { + type Output; + fn fold<A, F>(self, init: A, func: F) -> Fold<Self, A, F> + where + A: Clone, + F: Fn(A, Self::Output) -> A, + { + Fold { this: self, init, func } + } + } + + #[allow(dead_code)] + struct Fold<S, A, F> { + this: S, + init: A, + func: F, + } + + fn main() { + Foo.fold(Some(0), |acc, entry| Some(acc? + entry)); + } +} diff --git a/src/tools/clippy/tests/ui/map_err.stderr b/src/tools/clippy/tests/ui/map_err.stderr index 6a845c84a..eb6742ff2 100644 --- a/src/tools/clippy/tests/ui/map_err.stderr +++ b/src/tools/clippy/tests/ui/map_err.stderr @@ -8,5 +8,5 @@ LL | println!("{:?}", x.map_err(|_| Errors::Ignored)); = note: `-D clippy::map-err-ignore` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::map_err_ignore)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/map_identity.fixed b/src/tools/clippy/tests/ui/map_identity.fixed index 62b0ba018..53ebfb40b 100644 --- a/src/tools/clippy/tests/ui/map_identity.fixed +++ b/src/tools/clippy/tests/ui/map_identity.fixed @@ -24,28 +24,40 @@ fn main() { fn issue7189() { // should lint - let x = [(1, 2), (3, 4)]; - let _ = x.iter(); - let _ = x.iter(); - let _ = x.iter(); + let x = [(1, 2), (3, 4)].iter().copied(); + let _ = x.clone(); + let _ = x.clone(); + let _ = x.clone(); - let y = [(1, 2, (3, (4,))), (5, 6, (7, (8,)))]; - let _ = y.iter(); + let y = [(1, 2, (3, (4,))), (5, 6, (7, (8,)))].iter().copied(); + let _ = y.clone(); // should not lint - let _ = x.iter().map(|(x, y)| (x, y, y)); - let _ = x.iter().map(|(x, _y)| (x,)); - let _ = x.iter().map(|(x, _)| (x,)); - let _ = x.iter().map(|(x, ..)| (x,)); - let _ = y.iter().map(|(x, y, (z, _))| (x, y, (z, z))); + let _ = x.clone().map(|(x, y)| (x, y, y)); + let _ = x.clone().map(|(x, _y)| (x,)); + let _ = x.clone().map(|(x, _)| (x,)); + let _ = x.clone().map(|(x, ..)| (x,)); + let _ = y.clone().map(|(x, y, (z, _))| (x, y, (z, z))); let _ = y - .iter() - .map(|(x, y, (z, _)): &(i32, i32, (i32, (i32,)))| (x, y, (z, z))); + .clone() + .map(|(x, y, (z, _)): (i32, i32, (i32, (i32,)))| (x, y, (z, z))); let _ = y - .iter() - .map(|(x, y, (z, (w,))): &(i32, i32, (i32, (i32,)))| (x, y, (z, (w,)))); + .clone() + .map(|(x, y, (z, (w,))): (i32, i32, (i32, (i32,)))| (x, y, (z, (w,)))); } fn not_identity(x: &u16) -> u16 { *x } + +fn issue11764() { + let x = [(1, 2), (3, 4)]; + // don't lint: this is an `Iterator<Item = &(i32, i32)>` + // match ergonomics makes the binding patterns into references + // so that its type changes to `Iterator<Item = (&i32, &i32)>` + let _ = x.iter().map(|(x, y)| (x, y)); + let _ = x.iter().map(|x| (x.0,)).map(|(x,)| x); + + // no match ergonomics for `(i32, i32)` + let _ = x.iter().copied(); +} diff --git a/src/tools/clippy/tests/ui/map_identity.rs b/src/tools/clippy/tests/ui/map_identity.rs index b7f4c99f2..c646c0568 100644 --- a/src/tools/clippy/tests/ui/map_identity.rs +++ b/src/tools/clippy/tests/ui/map_identity.rs @@ -26,30 +26,42 @@ fn main() { fn issue7189() { // should lint - let x = [(1, 2), (3, 4)]; - let _ = x.iter().map(|(x, y)| (x, y)); - let _ = x.iter().map(|(x, y)| { + let x = [(1, 2), (3, 4)].iter().copied(); + let _ = x.clone().map(|(x, y)| (x, y)); + let _ = x.clone().map(|(x, y)| { return (x, y); }); - let _ = x.iter().map(|(x, y)| return (x, y)); + let _ = x.clone().map(|(x, y)| return (x, y)); - let y = [(1, 2, (3, (4,))), (5, 6, (7, (8,)))]; - let _ = y.iter().map(|(x, y, (z, (w,)))| (x, y, (z, (w,)))); + let y = [(1, 2, (3, (4,))), (5, 6, (7, (8,)))].iter().copied(); + let _ = y.clone().map(|(x, y, (z, (w,)))| (x, y, (z, (w,)))); // should not lint - let _ = x.iter().map(|(x, y)| (x, y, y)); - let _ = x.iter().map(|(x, _y)| (x,)); - let _ = x.iter().map(|(x, _)| (x,)); - let _ = x.iter().map(|(x, ..)| (x,)); - let _ = y.iter().map(|(x, y, (z, _))| (x, y, (z, z))); + let _ = x.clone().map(|(x, y)| (x, y, y)); + let _ = x.clone().map(|(x, _y)| (x,)); + let _ = x.clone().map(|(x, _)| (x,)); + let _ = x.clone().map(|(x, ..)| (x,)); + let _ = y.clone().map(|(x, y, (z, _))| (x, y, (z, z))); let _ = y - .iter() - .map(|(x, y, (z, _)): &(i32, i32, (i32, (i32,)))| (x, y, (z, z))); + .clone() + .map(|(x, y, (z, _)): (i32, i32, (i32, (i32,)))| (x, y, (z, z))); let _ = y - .iter() - .map(|(x, y, (z, (w,))): &(i32, i32, (i32, (i32,)))| (x, y, (z, (w,)))); + .clone() + .map(|(x, y, (z, (w,))): (i32, i32, (i32, (i32,)))| (x, y, (z, (w,)))); } fn not_identity(x: &u16) -> u16 { *x } + +fn issue11764() { + let x = [(1, 2), (3, 4)]; + // don't lint: this is an `Iterator<Item = &(i32, i32)>` + // match ergonomics makes the binding patterns into references + // so that its type changes to `Iterator<Item = (&i32, &i32)>` + let _ = x.iter().map(|(x, y)| (x, y)); + let _ = x.iter().map(|x| (x.0,)).map(|(x,)| x); + + // no match ergonomics for `(i32, i32)` + let _ = x.iter().copied().map(|(x, y)| (x, y)); +} diff --git a/src/tools/clippy/tests/ui/map_identity.stderr b/src/tools/clippy/tests/ui/map_identity.stderr index 4ca24b0b0..ea077d66d 100644 --- a/src/tools/clippy/tests/ui/map_identity.stderr +++ b/src/tools/clippy/tests/ui/map_identity.stderr @@ -41,31 +41,37 @@ LL | let _: Result<u32, u32> = Ok(1).map_err(|a| a); | ^^^^^^^^^^^^^^^ help: remove the call to `map_err` error: unnecessary map of the identity function - --> $DIR/map_identity.rs:30:21 + --> $DIR/map_identity.rs:30:22 | -LL | let _ = x.iter().map(|(x, y)| (x, y)); - | ^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map` +LL | let _ = x.clone().map(|(x, y)| (x, y)); + | ^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map` error: unnecessary map of the identity function - --> $DIR/map_identity.rs:31:21 + --> $DIR/map_identity.rs:31:22 | -LL | let _ = x.iter().map(|(x, y)| { - | _____________________^ +LL | let _ = x.clone().map(|(x, y)| { + | ______________________^ LL | | return (x, y); LL | | }); | |______^ help: remove the call to `map` error: unnecessary map of the identity function - --> $DIR/map_identity.rs:34:21 + --> $DIR/map_identity.rs:34:22 | -LL | let _ = x.iter().map(|(x, y)| return (x, y)); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map` +LL | let _ = x.clone().map(|(x, y)| return (x, y)); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map` error: unnecessary map of the identity function - --> $DIR/map_identity.rs:37:21 + --> $DIR/map_identity.rs:37:22 | -LL | let _ = y.iter().map(|(x, y, (z, (w,)))| (x, y, (z, (w,)))); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map` +LL | let _ = y.clone().map(|(x, y, (z, (w,)))| (x, y, (z, (w,)))); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map` -error: aborting due to 10 previous errors +error: unnecessary map of the identity function + --> $DIR/map_identity.rs:66:30 + | +LL | let _ = x.iter().copied().map(|(x, y)| (x, y)); + | ^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map` + +error: aborting due to 11 previous errors diff --git a/src/tools/clippy/tests/ui/map_unwrap_or.stderr b/src/tools/clippy/tests/ui/map_unwrap_or.stderr index 7b7eeb322..54ddd1402 100644 --- a/src/tools/clippy/tests/ui/map_unwrap_or.stderr +++ b/src/tools/clippy/tests/ui/map_unwrap_or.stderr @@ -1,4 +1,4 @@ -error: called `map(<f>).unwrap_or(<a>)` on an `Option` value. This can be done more directly by calling `map_or(<a>, <f>)` instead +error: called `map(<f>).unwrap_or(<a>)` on an `Option` value --> $DIR/map_unwrap_or.rs:17:13 | LL | let _ = opt.map(|x| x + 1) @@ -15,7 +15,7 @@ LL - let _ = opt.map(|x| x + 1) LL + let _ = opt.map_or(0, |x| x + 1); | -error: called `map(<f>).unwrap_or(<a>)` on an `Option` value. This can be done more directly by calling `map_or(<a>, <f>)` instead +error: called `map(<f>).unwrap_or(<a>)` on an `Option` value --> $DIR/map_unwrap_or.rs:21:13 | LL | let _ = opt.map(|x| { @@ -33,7 +33,7 @@ LL | } LL ~ ); | -error: called `map(<f>).unwrap_or(<a>)` on an `Option` value. This can be done more directly by calling `map_or(<a>, <f>)` instead +error: called `map(<f>).unwrap_or(<a>)` on an `Option` value --> $DIR/map_unwrap_or.rs:25:13 | LL | let _ = opt.map(|x| x + 1) @@ -50,7 +50,7 @@ LL + 0 LL ~ }, |x| x + 1); | -error: called `map(<f>).unwrap_or(None)` on an `Option` value. This can be done more directly by calling `and_then(<f>)` instead +error: called `map(<f>).unwrap_or(None)` on an `Option` value --> $DIR/map_unwrap_or.rs:30:13 | LL | let _ = opt.map(|x| Some(x + 1)).unwrap_or(None); @@ -62,7 +62,7 @@ LL - let _ = opt.map(|x| Some(x + 1)).unwrap_or(None); LL + let _ = opt.and_then(|x| Some(x + 1)); | -error: called `map(<f>).unwrap_or(None)` on an `Option` value. This can be done more directly by calling `and_then(<f>)` instead +error: called `map(<f>).unwrap_or(None)` on an `Option` value --> $DIR/map_unwrap_or.rs:32:13 | LL | let _ = opt.map(|x| { @@ -80,7 +80,7 @@ LL | } LL ~ ); | -error: called `map(<f>).unwrap_or(None)` on an `Option` value. This can be done more directly by calling `and_then(<f>)` instead +error: called `map(<f>).unwrap_or(None)` on an `Option` value --> $DIR/map_unwrap_or.rs:36:13 | LL | let _ = opt @@ -95,7 +95,7 @@ LL - .map(|x| Some(x + 1)) LL + .and_then(|x| Some(x + 1)); | -error: called `map(<f>).unwrap_or(<a>)` on an `Option` value. This can be done more directly by calling `map_or(<a>, <f>)` instead +error: called `map(<f>).unwrap_or(<a>)` on an `Option` value --> $DIR/map_unwrap_or.rs:47:13 | LL | let _ = Some("prefix").map(|p| format!("{}.", p)).unwrap_or(id); @@ -107,7 +107,7 @@ LL - let _ = Some("prefix").map(|p| format!("{}.", p)).unwrap_or(id); LL + let _ = Some("prefix").map_or(id, |p| format!("{}.", p)); | -error: called `map(<f>).unwrap_or_else(<g>)` on an `Option` value. This can be done more directly by calling `map_or_else(<g>, <f>)` instead +error: called `map(<f>).unwrap_or_else(<g>)` on an `Option` value --> $DIR/map_unwrap_or.rs:51:13 | LL | let _ = opt.map(|x| { @@ -117,7 +117,7 @@ LL | | } LL | | ).unwrap_or_else(|| 0); | |__________________________^ -error: called `map(<f>).unwrap_or_else(<g>)` on an `Option` value. This can be done more directly by calling `map_or_else(<g>, <f>)` instead +error: called `map(<f>).unwrap_or_else(<g>)` on an `Option` value --> $DIR/map_unwrap_or.rs:55:13 | LL | let _ = opt.map(|x| x + 1) @@ -127,7 +127,7 @@ LL | | 0 LL | | ); | |_________^ -error: called `map(<f>).unwrap_or(false)` on an `Option` value. This can be done more directly by calling `is_some_and(<f>)` instead +error: called `map(<f>).unwrap_or(false)` on an `Option` value --> $DIR/map_unwrap_or.rs:61:13 | LL | let _ = opt.map(|x| x > 5).unwrap_or(false); @@ -139,7 +139,7 @@ LL - let _ = opt.map(|x| x > 5).unwrap_or(false); LL + let _ = opt.is_some_and(|x| x > 5); | -error: called `map(<f>).unwrap_or_else(<g>)` on a `Result` value. This can be done more directly by calling `.map_or_else(<g>, <f>)` instead +error: called `map(<f>).unwrap_or_else(<g>)` on a `Result` value --> $DIR/map_unwrap_or.rs:71:13 | LL | let _ = res.map(|x| { @@ -149,7 +149,7 @@ LL | | } LL | | ).unwrap_or_else(|_e| 0); | |____________________________^ -error: called `map(<f>).unwrap_or_else(<g>)` on a `Result` value. This can be done more directly by calling `.map_or_else(<g>, <f>)` instead +error: called `map(<f>).unwrap_or_else(<g>)` on a `Result` value --> $DIR/map_unwrap_or.rs:75:13 | LL | let _ = res.map(|x| x + 1) @@ -159,13 +159,13 @@ LL | | 0 LL | | }); | |__________^ -error: called `map(<f>).unwrap_or_else(<g>)` on a `Result` value. This can be done more directly by calling `.map_or_else(<g>, <f>)` instead +error: called `map(<f>).unwrap_or_else(<g>)` on a `Result` value --> $DIR/map_unwrap_or.rs:99:13 | LL | let _ = res.map(|x| x + 1).unwrap_or_else(|_e| 0); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `res.map_or_else(|_e| 0, |x| x + 1)` -error: called `map(<f>).unwrap_or(<a>)` on an `Option` value. This can be done more directly by calling `map_or(<a>, <f>)` instead +error: called `map(<f>).unwrap_or(<a>)` on an `Option` value --> $DIR/map_unwrap_or.rs:106:13 | LL | let _ = opt.map(|x| x > 5).unwrap_or(false); @@ -177,7 +177,7 @@ LL - let _ = opt.map(|x| x > 5).unwrap_or(false); LL + let _ = opt.map_or(false, |x| x > 5); | -error: called `map(<f>).unwrap_or(false)` on an `Option` value. This can be done more directly by calling `is_some_and(<f>)` instead +error: called `map(<f>).unwrap_or(false)` on an `Option` value --> $DIR/map_unwrap_or.rs:113:13 | LL | let _ = opt.map(|x| x > 5).unwrap_or(false); diff --git a/src/tools/clippy/tests/ui/map_unwrap_or_fixable.stderr b/src/tools/clippy/tests/ui/map_unwrap_or_fixable.stderr index ca611ac9d..d1a9fdd6e 100644 --- a/src/tools/clippy/tests/ui/map_unwrap_or_fixable.stderr +++ b/src/tools/clippy/tests/ui/map_unwrap_or_fixable.stderr @@ -1,4 +1,4 @@ -error: called `map(<f>).unwrap_or_else(<g>)` on an `Option` value. This can be done more directly by calling `map_or_else(<g>, <f>)` instead +error: called `map(<f>).unwrap_or_else(<g>)` on an `Option` value --> $DIR/map_unwrap_or_fixable.rs:16:13 | LL | let _ = opt.map(|x| x + 1) @@ -10,7 +10,7 @@ LL | | .unwrap_or_else(|| 0); = note: `-D clippy::map-unwrap-or` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::map_unwrap_or)]` -error: called `map(<f>).unwrap_or_else(<g>)` on a `Result` value. This can be done more directly by calling `.map_or_else(<g>, <f>)` instead +error: called `map(<f>).unwrap_or_else(<g>)` on a `Result` value --> $DIR/map_unwrap_or_fixable.rs:46:13 | LL | let _ = res.map(|x| x + 1) diff --git a/src/tools/clippy/tests/ui/mem_replace_macro.stderr b/src/tools/clippy/tests/ui/mem_replace_macro.stderr index 842ad3a85..c6435e94e 100644 --- a/src/tools/clippy/tests/ui/mem_replace_macro.stderr +++ b/src/tools/clippy/tests/ui/mem_replace_macro.stderr @@ -8,5 +8,5 @@ LL | inline!(std::mem::replace($s, Default::default())); = help: to override `-D warnings` add `#[allow(clippy::mem_replace_with_default)]` = note: this error originates in the macro `__inline_mac_fn_main` (in Nightly builds, run with -Z macro-backtrace for more info) -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/methods_fixable.stderr b/src/tools/clippy/tests/ui/methods_fixable.stderr index 1bfe56d91..f290c20e5 100644 --- a/src/tools/clippy/tests/ui/methods_fixable.stderr +++ b/src/tools/clippy/tests/ui/methods_fixable.stderr @@ -7,5 +7,5 @@ LL | let _ = v.iter().filter(|&x| *x < 0).next(); = note: `-D clippy::filter-next` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::filter_next)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/methods_unfixable.stderr b/src/tools/clippy/tests/ui/methods_unfixable.stderr index 581a985e0..771e10cbe 100644 --- a/src/tools/clippy/tests/ui/methods_unfixable.stderr +++ b/src/tools/clippy/tests/ui/methods_unfixable.stderr @@ -12,5 +12,5 @@ LL | let iter = (0..10); = note: `-D clippy::filter-next` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::filter_next)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/missing_asserts_for_indexing.fixed b/src/tools/clippy/tests/ui/missing_asserts_for_indexing.fixed index a96827259..ac44a6f3f 100644 --- a/src/tools/clippy/tests/ui/missing_asserts_for_indexing.fixed +++ b/src/tools/clippy/tests/ui/missing_asserts_for_indexing.fixed @@ -118,4 +118,19 @@ fn index_different_slice_in_same_expr(v1: &[u8], v2: &[u8]) { let _ = v1[0] + v2[1]; } +fn issue11835(v1: &[u8], v2: &[u8], v3: &[u8], v4: &[u8]) { + assert!(v1.len() == 3); + assert!(v2.len() == 4); + assert!(v3.len() == 3); + assert!(4 == v4.len()); + + let _ = v1[0] + v1[1] + v1[2]; + //~^ ERROR: indexing into a slice multiple times with an `assert` that does not cover the + let _ = v2[0] + v2[1] + v2[2]; + + let _ = v3[0] + v3[1] + v3[2]; + //~^ ERROR: indexing into a slice multiple times with an `assert` that does not cover the + let _ = v4[0] + v4[1] + v4[2]; +} + fn main() {} diff --git a/src/tools/clippy/tests/ui/missing_asserts_for_indexing.rs b/src/tools/clippy/tests/ui/missing_asserts_for_indexing.rs index 0b4b883ac..f05d5fea5 100644 --- a/src/tools/clippy/tests/ui/missing_asserts_for_indexing.rs +++ b/src/tools/clippy/tests/ui/missing_asserts_for_indexing.rs @@ -118,4 +118,19 @@ fn index_different_slice_in_same_expr(v1: &[u8], v2: &[u8]) { let _ = v1[0] + v2[1]; } +fn issue11835(v1: &[u8], v2: &[u8], v3: &[u8], v4: &[u8]) { + assert!(v1.len() == 2); + assert!(v2.len() == 4); + assert!(2 == v3.len()); + assert!(4 == v4.len()); + + let _ = v1[0] + v1[1] + v1[2]; + //~^ ERROR: indexing into a slice multiple times with an `assert` that does not cover the + let _ = v2[0] + v2[1] + v2[2]; + + let _ = v3[0] + v3[1] + v3[2]; + //~^ ERROR: indexing into a slice multiple times with an `assert` that does not cover the + let _ = v4[0] + v4[1] + v4[2]; +} + fn main() {} diff --git a/src/tools/clippy/tests/ui/missing_asserts_for_indexing.stderr b/src/tools/clippy/tests/ui/missing_asserts_for_indexing.stderr index a3e66d795..61dce6ccc 100644 --- a/src/tools/clippy/tests/ui/missing_asserts_for_indexing.stderr +++ b/src/tools/clippy/tests/ui/missing_asserts_for_indexing.stderr @@ -249,5 +249,57 @@ LL | let _ = v1[0] + v1[12]; | ^^^^^^ = note: asserting the length before indexing will elide bounds checks -error: aborting due to 9 previous errors +error: indexing into a slice multiple times with an `assert` that does not cover the highest index + --> $DIR/missing_asserts_for_indexing.rs:127:13 + | +LL | assert!(v1.len() == 2); + | ---------------------- help: provide the highest index that is indexed with: `assert!(v1.len() == 3)` +... +LL | let _ = v1[0] + v1[1] + v1[2]; + | ^^^^^^^^^^^^^^^^^^^^^ + | +note: slice indexed here + --> $DIR/missing_asserts_for_indexing.rs:127:13 + | +LL | let _ = v1[0] + v1[1] + v1[2]; + | ^^^^^ +note: slice indexed here + --> $DIR/missing_asserts_for_indexing.rs:127:21 + | +LL | let _ = v1[0] + v1[1] + v1[2]; + | ^^^^^ +note: slice indexed here + --> $DIR/missing_asserts_for_indexing.rs:127:29 + | +LL | let _ = v1[0] + v1[1] + v1[2]; + | ^^^^^ + = note: asserting the length before indexing will elide bounds checks + +error: indexing into a slice multiple times with an `assert` that does not cover the highest index + --> $DIR/missing_asserts_for_indexing.rs:131:13 + | +LL | assert!(2 == v3.len()); + | ---------------------- help: provide the highest index that is indexed with: `assert!(v3.len() == 3)` +... +LL | let _ = v3[0] + v3[1] + v3[2]; + | ^^^^^^^^^^^^^^^^^^^^^ + | +note: slice indexed here + --> $DIR/missing_asserts_for_indexing.rs:131:13 + | +LL | let _ = v3[0] + v3[1] + v3[2]; + | ^^^^^ +note: slice indexed here + --> $DIR/missing_asserts_for_indexing.rs:131:21 + | +LL | let _ = v3[0] + v3[1] + v3[2]; + | ^^^^^ +note: slice indexed here + --> $DIR/missing_asserts_for_indexing.rs:131:29 + | +LL | let _ = v3[0] + v3[1] + v3[2]; + | ^^^^^ + = note: asserting the length before indexing will elide bounds checks + +error: aborting due to 11 previous errors diff --git a/src/tools/clippy/tests/ui/missing_asserts_for_indexing_unfixable.rs b/src/tools/clippy/tests/ui/missing_asserts_for_indexing_unfixable.rs index 4346ed892..de53079a4 100644 --- a/src/tools/clippy/tests/ui/missing_asserts_for_indexing_unfixable.rs +++ b/src/tools/clippy/tests/ui/missing_asserts_for_indexing_unfixable.rs @@ -46,4 +46,26 @@ fn index_struct_different_fields(f: &Foo<'_>) { let _ = f.v[0] + f.v2[1]; } +fn shadowing() { + let x: &[i32] = &[1]; + assert!(x.len() > 1); + + let x: &[i32] = &[1]; + let _ = x[0] + x[1]; + //~^ ERROR: indexing into a slice multiple times without an `assert` +} + +pub fn issue11856(values: &[i32]) -> usize { + let mut ascending = Vec::new(); + for w in values.windows(2) { + assert!(w.len() > 1); + if w[0] < w[1] { + ascending.push((w[0], w[1])); + } else { + ascending.push((w[1], w[0])); + } + } + ascending.len() +} + fn main() {} diff --git a/src/tools/clippy/tests/ui/missing_asserts_for_indexing_unfixable.stderr b/src/tools/clippy/tests/ui/missing_asserts_for_indexing_unfixable.stderr index 12c9eed5d..12e054227 100644 --- a/src/tools/clippy/tests/ui/missing_asserts_for_indexing_unfixable.stderr +++ b/src/tools/clippy/tests/ui/missing_asserts_for_indexing_unfixable.stderr @@ -160,5 +160,24 @@ LL | let _ = f.v[0] + f.v[1]; | ^^^^^^ = note: asserting the length before indexing will elide bounds checks -error: aborting due to 7 previous errors +error: indexing into a slice multiple times without an `assert` + --> $DIR/missing_asserts_for_indexing_unfixable.rs:54:13 + | +LL | let _ = x[0] + x[1]; + | ^^^^^^^^^^^ + | + = help: consider asserting the length before indexing: `assert!(x.len() > 1);` +note: slice indexed here + --> $DIR/missing_asserts_for_indexing_unfixable.rs:54:13 + | +LL | let _ = x[0] + x[1]; + | ^^^^ +note: slice indexed here + --> $DIR/missing_asserts_for_indexing_unfixable.rs:54:20 + | +LL | let _ = x[0] + x[1]; + | ^^^^ + = note: asserting the length before indexing will elide bounds checks + +error: aborting due to 8 previous errors diff --git a/src/tools/clippy/tests/ui/missing_doc_crate_missing.stderr b/src/tools/clippy/tests/ui/missing_doc_crate_missing.stderr index c684bc8e7..3aa9781c2 100644 --- a/src/tools/clippy/tests/ui/missing_doc_crate_missing.stderr +++ b/src/tools/clippy/tests/ui/missing_doc_crate_missing.stderr @@ -11,5 +11,5 @@ LL | | fn main() {} = note: `-D clippy::missing-docs-in-private-items` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::missing_docs_in_private_items)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/missing_spin_loop_no_std.stderr b/src/tools/clippy/tests/ui/missing_spin_loop_no_std.stderr index 0b7be4616..d84d06088 100644 --- a/src/tools/clippy/tests/ui/missing_spin_loop_no_std.stderr +++ b/src/tools/clippy/tests/ui/missing_spin_loop_no_std.stderr @@ -7,5 +7,5 @@ LL | while b.load(Ordering::Acquire) {} = note: `-D clippy::missing-spin-loop` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::missing_spin_loop)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/mut_mutex_lock.stderr b/src/tools/clippy/tests/ui/mut_mutex_lock.stderr index 9b20016be..819602882 100644 --- a/src/tools/clippy/tests/ui/mut_mutex_lock.stderr +++ b/src/tools/clippy/tests/ui/mut_mutex_lock.stderr @@ -7,5 +7,5 @@ LL | let mut value = value_mutex.lock().unwrap(); = note: `-D clippy::mut-mutex-lock` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::mut_mutex_lock)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/needless_arbitrary_self_type_unfixable.stderr b/src/tools/clippy/tests/ui/needless_arbitrary_self_type_unfixable.stderr index 183e2dbc8..e91359a3c 100644 --- a/src/tools/clippy/tests/ui/needless_arbitrary_self_type_unfixable.stderr +++ b/src/tools/clippy/tests/ui/needless_arbitrary_self_type_unfixable.stderr @@ -7,5 +7,5 @@ LL | fn call_with_mut_self(self: &mut Self) {} = note: `-D clippy::needless-arbitrary-self-type` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::needless_arbitrary_self_type)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/needless_bitwise_bool.stderr b/src/tools/clippy/tests/ui/needless_bitwise_bool.stderr index 2ed9208e6..b1fc1a7a9 100644 --- a/src/tools/clippy/tests/ui/needless_bitwise_bool.stderr +++ b/src/tools/clippy/tests/ui/needless_bitwise_bool.stderr @@ -7,5 +7,5 @@ LL | if y & !x { = note: `-D clippy::needless-bitwise-bool` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::needless_bitwise_bool)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/needless_bool_assign.stderr b/src/tools/clippy/tests/ui/needless_bool_assign.stderr index 7866c89bd..244a88e66 100644 --- a/src/tools/clippy/tests/ui/needless_bool_assign.stderr +++ b/src/tools/clippy/tests/ui/needless_bool_assign.stderr @@ -48,7 +48,8 @@ LL | } else { LL | | a.field = true; LL | | } | |_____^ - = note: `#[deny(clippy::if_same_then_else)]` on by default + = note: `-D clippy::if-same-then-else` implied by `-D warnings` + = help: to override `-D warnings` add `#[allow(clippy::if_same_then_else)]` error: aborting due to 4 previous errors diff --git a/src/tools/clippy/tests/ui/needless_borrow.fixed b/src/tools/clippy/tests/ui/needless_borrow.fixed index c2c5f765a..ff1e2dc88 100644 --- a/src/tools/clippy/tests/ui/needless_borrow.fixed +++ b/src/tools/clippy/tests/ui/needless_borrow.fixed @@ -190,27 +190,48 @@ fn issue9383() { // Should not lint because unions need explicit deref when accessing field use std::mem::ManuallyDrop; - union Coral { - crab: ManuallyDrop<Vec<i32>>, + #[derive(Clone, Copy)] + struct Wrap<T>(T); + impl<T> core::ops::Deref for Wrap<T> { + type Target = T; + fn deref(&self) -> &T { + &self.0 + } + } + impl<T> core::ops::DerefMut for Wrap<T> { + fn deref_mut(&mut self) -> &mut T { + &mut self.0 + } } - union Ocean { - coral: ManuallyDrop<Coral>, + union U<T: Copy> { + u: T, } - let mut ocean = Ocean { - coral: ManuallyDrop::new(Coral { - crab: ManuallyDrop::new(vec![1, 2, 3]), - }), - }; + #[derive(Clone, Copy)] + struct Foo { + x: u32, + } unsafe { - ManuallyDrop::drop(&mut (&mut ocean.coral).crab); - - (*ocean.coral).crab = ManuallyDrop::new(vec![4, 5, 6]); - ManuallyDrop::drop(&mut (*ocean.coral).crab); - - ManuallyDrop::drop(&mut ocean.coral); + let mut x = U { + u: ManuallyDrop::new(Foo { x: 0 }), + }; + let _ = &mut (&mut x.u).x; + let _ = &mut { x.u }.x; + let _ = &mut ({ &mut x.u }).x; + + let mut x = U { + u: Wrap(ManuallyDrop::new(Foo { x: 0 })), + }; + let _ = &mut (&mut x.u).x; + let _ = &mut { x.u }.x; + let _ = &mut ({ &mut x.u }).x; + + let mut x = U { u: Wrap(Foo { x: 0 }) }; + let _ = &mut x.u.x; + let _ = &mut { x.u }.x; + let _ = &mut ({ &mut x.u }).x; } } diff --git a/src/tools/clippy/tests/ui/needless_borrow.rs b/src/tools/clippy/tests/ui/needless_borrow.rs index 0cd6e41b8..597021539 100644 --- a/src/tools/clippy/tests/ui/needless_borrow.rs +++ b/src/tools/clippy/tests/ui/needless_borrow.rs @@ -190,27 +190,48 @@ fn issue9383() { // Should not lint because unions need explicit deref when accessing field use std::mem::ManuallyDrop; - union Coral { - crab: ManuallyDrop<Vec<i32>>, + #[derive(Clone, Copy)] + struct Wrap<T>(T); + impl<T> core::ops::Deref for Wrap<T> { + type Target = T; + fn deref(&self) -> &T { + &self.0 + } + } + impl<T> core::ops::DerefMut for Wrap<T> { + fn deref_mut(&mut self) -> &mut T { + &mut self.0 + } } - union Ocean { - coral: ManuallyDrop<Coral>, + union U<T: Copy> { + u: T, } - let mut ocean = Ocean { - coral: ManuallyDrop::new(Coral { - crab: ManuallyDrop::new(vec![1, 2, 3]), - }), - }; + #[derive(Clone, Copy)] + struct Foo { + x: u32, + } unsafe { - ManuallyDrop::drop(&mut (&mut ocean.coral).crab); - - (*ocean.coral).crab = ManuallyDrop::new(vec![4, 5, 6]); - ManuallyDrop::drop(&mut (*ocean.coral).crab); - - ManuallyDrop::drop(&mut ocean.coral); + let mut x = U { + u: ManuallyDrop::new(Foo { x: 0 }), + }; + let _ = &mut (&mut x.u).x; + let _ = &mut (&mut { x.u }).x; + let _ = &mut ({ &mut x.u }).x; + + let mut x = U { + u: Wrap(ManuallyDrop::new(Foo { x: 0 })), + }; + let _ = &mut (&mut x.u).x; + let _ = &mut (&mut { x.u }).x; + let _ = &mut ({ &mut x.u }).x; + + let mut x = U { u: Wrap(Foo { x: 0 }) }; + let _ = &mut (&mut x.u).x; + let _ = &mut (&mut { x.u }).x; + let _ = &mut ({ &mut x.u }).x; } } diff --git a/src/tools/clippy/tests/ui/needless_borrow.stderr b/src/tools/clippy/tests/ui/needless_borrow.stderr index e91b78b0a..44552ee6a 100644 --- a/src/tools/clippy/tests/ui/needless_borrow.stderr +++ b/src/tools/clippy/tests/ui/needless_borrow.stderr @@ -133,5 +133,29 @@ error: this expression borrows a value the compiler would automatically borrow LL | (&mut self.f)() | ^^^^^^^^^^^^^ help: change this to: `(self.f)` -error: aborting due to 22 previous errors +error: this expression borrows a value the compiler would automatically borrow + --> $DIR/needless_borrow.rs:221:22 + | +LL | let _ = &mut (&mut { x.u }).x; + | ^^^^^^^^^^^^^^ help: change this to: `{ x.u }` + +error: this expression borrows a value the compiler would automatically borrow + --> $DIR/needless_borrow.rs:228:22 + | +LL | let _ = &mut (&mut { x.u }).x; + | ^^^^^^^^^^^^^^ help: change this to: `{ x.u }` + +error: this expression borrows a value the compiler would automatically borrow + --> $DIR/needless_borrow.rs:232:22 + | +LL | let _ = &mut (&mut x.u).x; + | ^^^^^^^^^^ help: change this to: `x.u` + +error: this expression borrows a value the compiler would automatically borrow + --> $DIR/needless_borrow.rs:233:22 + | +LL | let _ = &mut (&mut { x.u }).x; + | ^^^^^^^^^^^^^^ help: change this to: `{ x.u }` + +error: aborting due to 26 previous errors diff --git a/src/tools/clippy/tests/ui/needless_borrows_for_generic_args.fixed b/src/tools/clippy/tests/ui/needless_borrows_for_generic_args.fixed index 2a335516f..bd7a9a0b9 100644 --- a/src/tools/clippy/tests/ui/needless_borrows_for_generic_args.fixed +++ b/src/tools/clippy/tests/ui/needless_borrows_for_generic_args.fixed @@ -284,4 +284,19 @@ fn main() { { } } + // address of field when operand impl Drop + { + struct CustomDrop(String); + + impl Drop for CustomDrop { + fn drop(&mut self) {} + } + + fn check_str<P: AsRef<str>>(_to: P) {} + + fn test() { + let owner = CustomDrop(String::default()); + check_str(&owner.0); // Don't lint. `owner` can't be partially moved because it impl Drop + } + } } diff --git a/src/tools/clippy/tests/ui/needless_borrows_for_generic_args.rs b/src/tools/clippy/tests/ui/needless_borrows_for_generic_args.rs index f0567f486..5cfd4ce30 100644 --- a/src/tools/clippy/tests/ui/needless_borrows_for_generic_args.rs +++ b/src/tools/clippy/tests/ui/needless_borrows_for_generic_args.rs @@ -284,4 +284,19 @@ fn main() { { } } + // address of field when operand impl Drop + { + struct CustomDrop(String); + + impl Drop for CustomDrop { + fn drop(&mut self) {} + } + + fn check_str<P: AsRef<str>>(_to: P) {} + + fn test() { + let owner = CustomDrop(String::default()); + check_str(&owner.0); // Don't lint. `owner` can't be partially moved because it impl Drop + } + } } diff --git a/src/tools/clippy/tests/ui/needless_else.stderr b/src/tools/clippy/tests/ui/needless_else.stderr index e6f7138e9..66552109c 100644 --- a/src/tools/clippy/tests/ui/needless_else.stderr +++ b/src/tools/clippy/tests/ui/needless_else.stderr @@ -9,5 +9,5 @@ LL | | } = note: `-D clippy::needless-else` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::needless_else)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/needless_for_each_unfixable.stderr b/src/tools/clippy/tests/ui/needless_for_each_unfixable.stderr index 73f249ae6..24a22e232 100644 --- a/src/tools/clippy/tests/ui/needless_for_each_unfixable.stderr +++ b/src/tools/clippy/tests/ui/needless_for_each_unfixable.stderr @@ -29,5 +29,5 @@ help: ...and replace `return` with `continue` LL | continue; | ~~~~~~~~ -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/needless_if.fixed b/src/tools/clippy/tests/ui/needless_if.fixed index be35dcddb..1086ae2c9 100644 --- a/src/tools/clippy/tests/ui/needless_if.fixed +++ b/src/tools/clippy/tests/ui/needless_if.fixed @@ -1,7 +1,7 @@ //@aux-build:proc_macros.rs #![feature(let_chains)] #![allow( - clippy::blocks_in_if_conditions, + clippy::blocks_in_conditions, clippy::if_same_then_else, clippy::ifs_same_cond, clippy::let_unit_value, diff --git a/src/tools/clippy/tests/ui/needless_if.rs b/src/tools/clippy/tests/ui/needless_if.rs index e2ad17e69..131cceaf7 100644 --- a/src/tools/clippy/tests/ui/needless_if.rs +++ b/src/tools/clippy/tests/ui/needless_if.rs @@ -1,7 +1,7 @@ //@aux-build:proc_macros.rs #![feature(let_chains)] #![allow( - clippy::blocks_in_if_conditions, + clippy::blocks_in_conditions, clippy::if_same_then_else, clippy::ifs_same_cond, clippy::let_unit_value, diff --git a/src/tools/clippy/tests/ui/needless_late_init.fixed b/src/tools/clippy/tests/ui/needless_late_init.fixed index 891b2b014..6db870490 100644 --- a/src/tools/clippy/tests/ui/needless_late_init.fixed +++ b/src/tools/clippy/tests/ui/needless_late_init.fixed @@ -3,7 +3,7 @@ #![allow(unused)] #![allow( clippy::assign_op_pattern, - clippy::blocks_in_if_conditions, + clippy::blocks_in_conditions, clippy::let_and_return, clippy::let_unit_value, clippy::nonminimal_bool, diff --git a/src/tools/clippy/tests/ui/needless_late_init.rs b/src/tools/clippy/tests/ui/needless_late_init.rs index 553995116..c1e86212a 100644 --- a/src/tools/clippy/tests/ui/needless_late_init.rs +++ b/src/tools/clippy/tests/ui/needless_late_init.rs @@ -3,7 +3,7 @@ #![allow(unused)] #![allow( clippy::assign_op_pattern, - clippy::blocks_in_if_conditions, + clippy::blocks_in_conditions, clippy::let_and_return, clippy::let_unit_value, clippy::nonminimal_bool, diff --git a/src/tools/clippy/tests/ui/needless_option_take.stderr b/src/tools/clippy/tests/ui/needless_option_take.stderr index d3c22441d..bf43a18e7 100644 --- a/src/tools/clippy/tests/ui/needless_option_take.stderr +++ b/src/tools/clippy/tests/ui/needless_option_take.stderr @@ -7,5 +7,5 @@ LL | x.as_ref().take(); = note: `-D clippy::needless-option-take` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::needless_option_take)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/needless_pass_by_ref_mut.rs b/src/tools/clippy/tests/ui/needless_pass_by_ref_mut.rs index bdb6d40d9..a92197fb0 100644 --- a/src/tools/clippy/tests/ui/needless_pass_by_ref_mut.rs +++ b/src/tools/clippy/tests/ui/needless_pass_by_ref_mut.rs @@ -1,4 +1,9 @@ -#![allow(clippy::if_same_then_else, clippy::no_effect, clippy::redundant_closure_call)] +#![allow( + clippy::if_same_then_else, + clippy::no_effect, + clippy::redundant_closure_call, + clippy::ptr_arg +)] #![warn(clippy::needless_pass_by_ref_mut)] #![feature(lint_reasons)] //@no-rustfix diff --git a/src/tools/clippy/tests/ui/needless_pass_by_ref_mut.stderr b/src/tools/clippy/tests/ui/needless_pass_by_ref_mut.stderr index 3e1415be0..5d1e9515d 100644 --- a/src/tools/clippy/tests/ui/needless_pass_by_ref_mut.stderr +++ b/src/tools/clippy/tests/ui/needless_pass_by_ref_mut.stderr @@ -1,5 +1,5 @@ error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:7:11 + --> $DIR/needless_pass_by_ref_mut.rs:12:11 | LL | fn foo(s: &mut Vec<u32>, b: &u32, x: &mut u32) { | ^^^^^^^^^^^^^ help: consider changing to: `&Vec<u32>` @@ -8,79 +8,79 @@ LL | fn foo(s: &mut Vec<u32>, b: &u32, x: &mut u32) { = help: to override `-D warnings` add `#[allow(clippy::needless_pass_by_ref_mut)]` error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:32:12 + --> $DIR/needless_pass_by_ref_mut.rs:37:12 | LL | fn foo6(s: &mut Vec<u32>) { | ^^^^^^^^^^^^^ help: consider changing to: `&Vec<u32>` error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:45:29 + --> $DIR/needless_pass_by_ref_mut.rs:50:29 | LL | fn mushroom(&self, vec: &mut Vec<i32>) -> usize { | ^^^^^^^^^^^^^ help: consider changing to: `&Vec<i32>` error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:50:31 + --> $DIR/needless_pass_by_ref_mut.rs:55:31 | LL | fn badger(&mut self, vec: &mut Vec<i32>) -> usize { | ^^^^^^^^^^^^^ help: consider changing to: `&Vec<i32>` error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:127:16 + --> $DIR/needless_pass_by_ref_mut.rs:132:16 | LL | async fn a1(x: &mut i32) { | ^^^^^^^^ help: consider changing to: `&i32` error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:131:16 + --> $DIR/needless_pass_by_ref_mut.rs:136:16 | LL | async fn a2(x: &mut i32, y: String) { | ^^^^^^^^ help: consider changing to: `&i32` error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:135:16 + --> $DIR/needless_pass_by_ref_mut.rs:140:16 | LL | async fn a3(x: &mut i32, y: String, z: String) { | ^^^^^^^^ help: consider changing to: `&i32` error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:139:16 + --> $DIR/needless_pass_by_ref_mut.rs:144:16 | LL | async fn a4(x: &mut i32, y: i32) { | ^^^^^^^^ help: consider changing to: `&i32` error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:143:24 + --> $DIR/needless_pass_by_ref_mut.rs:148:24 | LL | async fn a5(x: i32, y: &mut i32) { | ^^^^^^^^ help: consider changing to: `&i32` error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:147:24 + --> $DIR/needless_pass_by_ref_mut.rs:152:24 | LL | async fn a6(x: i32, y: &mut i32) { | ^^^^^^^^ help: consider changing to: `&i32` error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:151:32 + --> $DIR/needless_pass_by_ref_mut.rs:156:32 | LL | async fn a7(x: i32, y: i32, z: &mut i32) { | ^^^^^^^^ help: consider changing to: `&i32` error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:155:24 + --> $DIR/needless_pass_by_ref_mut.rs:160:24 | LL | async fn a8(x: i32, a: &mut i32, y: i32, z: &mut i32) { | ^^^^^^^^ help: consider changing to: `&i32` error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:155:45 + --> $DIR/needless_pass_by_ref_mut.rs:160:45 | LL | async fn a8(x: i32, a: &mut i32, y: i32, z: &mut i32) { | ^^^^^^^^ help: consider changing to: `&i32` error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:189:16 + --> $DIR/needless_pass_by_ref_mut.rs:194:16 | LL | fn cfg_warn(s: &mut u32) {} | ^^^^^^^^ help: consider changing to: `&u32` @@ -88,7 +88,7 @@ LL | fn cfg_warn(s: &mut u32) {} = note: this is cfg-gated and may require further changes error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:195:20 + --> $DIR/needless_pass_by_ref_mut.rs:200:20 | LL | fn cfg_warn(s: &mut u32) {} | ^^^^^^^^ help: consider changing to: `&u32` @@ -96,19 +96,19 @@ LL | fn cfg_warn(s: &mut u32) {} = note: this is cfg-gated and may require further changes error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:209:39 + --> $DIR/needless_pass_by_ref_mut.rs:214:39 | LL | async fn inner_async2(x: &mut i32, y: &mut u32) { | ^^^^^^^^ help: consider changing to: `&u32` error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:217:26 + --> $DIR/needless_pass_by_ref_mut.rs:222:26 | LL | async fn inner_async3(x: &mut i32, y: &mut u32) { | ^^^^^^^^ help: consider changing to: `&i32` error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:236:34 + --> $DIR/needless_pass_by_ref_mut.rs:241:34 | LL | pub async fn call_in_closure1(n: &mut str) { | ^^^^^^^^ help: consider changing to: `&str` @@ -116,7 +116,7 @@ LL | pub async fn call_in_closure1(n: &mut str) { = warning: changing this function will impact semver compatibility error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:248:25 + --> $DIR/needless_pass_by_ref_mut.rs:253:25 | LL | pub async fn closure(n: &mut usize) -> impl '_ + FnMut() { | ^^^^^^^^^^ help: consider changing to: `&usize` @@ -124,7 +124,7 @@ LL | pub async fn closure(n: &mut usize) -> impl '_ + FnMut() { = warning: changing this function will impact semver compatibility error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:255:20 + --> $DIR/needless_pass_by_ref_mut.rs:260:20 | LL | pub fn closure2(n: &mut usize) -> impl '_ + FnMut() -> usize { | ^^^^^^^^^^ help: consider changing to: `&usize` @@ -132,7 +132,7 @@ LL | pub fn closure2(n: &mut usize) -> impl '_ + FnMut() -> usize { = warning: changing this function will impact semver compatibility error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:266:26 + --> $DIR/needless_pass_by_ref_mut.rs:271:26 | LL | pub async fn closure4(n: &mut usize) { | ^^^^^^^^^^ help: consider changing to: `&usize` @@ -140,61 +140,61 @@ LL | pub async fn closure4(n: &mut usize) { = warning: changing this function will impact semver compatibility error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:306:18 + --> $DIR/needless_pass_by_ref_mut.rs:311:18 | LL | fn _empty_tup(x: &mut (())) {} | ^^^^^^^^^ help: consider changing to: `&()` error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:307:19 + --> $DIR/needless_pass_by_ref_mut.rs:312:19 | LL | fn _single_tup(x: &mut ((i32,))) {} | ^^^^^^^^^^^^^ help: consider changing to: `&(i32,)` error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:308:18 + --> $DIR/needless_pass_by_ref_mut.rs:313:18 | LL | fn _multi_tup(x: &mut ((i32, u32))) {} | ^^^^^^^^^^^^^^^^^ help: consider changing to: `&(i32, u32)` error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:309:11 + --> $DIR/needless_pass_by_ref_mut.rs:314:11 | LL | fn _fn(x: &mut (fn())) {} | ^^^^^^^^^^^ help: consider changing to: `&fn()` error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:311:23 + --> $DIR/needless_pass_by_ref_mut.rs:316:23 | LL | fn _extern_rust_fn(x: &mut extern "Rust" fn()) {} | ^^^^^^^^^^^^^^^^^^^^^^^ help: consider changing to: `&extern "Rust" fn()` error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:312:20 + --> $DIR/needless_pass_by_ref_mut.rs:317:20 | LL | fn _extern_c_fn(x: &mut extern "C" fn()) {} | ^^^^^^^^^^^^^^^^^^^^ help: consider changing to: `&extern "C" fn()` error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:313:18 + --> $DIR/needless_pass_by_ref_mut.rs:318:18 | LL | fn _unsafe_fn(x: &mut unsafe fn()) {} | ^^^^^^^^^^^^^^^^ help: consider changing to: `&unsafe fn()` error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:314:25 + --> $DIR/needless_pass_by_ref_mut.rs:319:25 | LL | fn _unsafe_extern_fn(x: &mut unsafe extern "C" fn()) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider changing to: `&unsafe extern "C" fn()` error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:315:20 + --> $DIR/needless_pass_by_ref_mut.rs:320:20 | LL | fn _fn_with_arg(x: &mut unsafe extern "C" fn(i32)) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider changing to: `&unsafe extern "C" fn(i32)` error: this argument is a mutable reference, but not used mutably - --> $DIR/needless_pass_by_ref_mut.rs:316:20 + --> $DIR/needless_pass_by_ref_mut.rs:321:20 | LL | fn _fn_with_ret(x: &mut unsafe extern "C" fn() -> (i32)) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider changing to: `&unsafe extern "C" fn() -> (i32)` diff --git a/src/tools/clippy/tests/ui/needless_return_with_question_mark.fixed b/src/tools/clippy/tests/ui/needless_return_with_question_mark.fixed index 52d541809..0147c73a9 100644 --- a/src/tools/clippy/tests/ui/needless_return_with_question_mark.fixed +++ b/src/tools/clippy/tests/ui/needless_return_with_question_mark.fixed @@ -4,6 +4,8 @@ clippy::no_effect, clippy::unit_arg, clippy::useless_conversion, + clippy::diverging_sub_expression, + clippy::let_unit_value, unused )] @@ -35,5 +37,43 @@ fn main() -> Result<(), ()> { with_span! { return Err(())?; } + + // Issue #11765 + // Should not lint + let Some(s) = Some("") else { + return Err(())?; + }; + + let Some(s) = Some("") else { + let Some(s) = Some("") else { + return Err(())?; + }; + + return Err(())?; + }; + + let Some(_): Option<()> = ({ + return Err(())?; + }) else { + panic!(); + }; + Err(()) } + +fn issue11616() -> Result<(), ()> { + let _x: String = { + return Err(())?; + }; + let _x: () = { + Err(())?; + //~^ ERROR: unneeded `return` statement with `?` operator + }; + let _x = match 1 { + 1 => vec![1, 2], + _ => { + return Err(())?; + }, + }; + Ok(()) +} diff --git a/src/tools/clippy/tests/ui/needless_return_with_question_mark.rs b/src/tools/clippy/tests/ui/needless_return_with_question_mark.rs index d253cae4d..66e1f438f 100644 --- a/src/tools/clippy/tests/ui/needless_return_with_question_mark.rs +++ b/src/tools/clippy/tests/ui/needless_return_with_question_mark.rs @@ -4,6 +4,8 @@ clippy::no_effect, clippy::unit_arg, clippy::useless_conversion, + clippy::diverging_sub_expression, + clippy::let_unit_value, unused )] @@ -35,5 +37,43 @@ fn main() -> Result<(), ()> { with_span! { return Err(())?; } + + // Issue #11765 + // Should not lint + let Some(s) = Some("") else { + return Err(())?; + }; + + let Some(s) = Some("") else { + let Some(s) = Some("") else { + return Err(())?; + }; + + return Err(())?; + }; + + let Some(_): Option<()> = ({ + return Err(())?; + }) else { + panic!(); + }; + Err(()) } + +fn issue11616() -> Result<(), ()> { + let _x: String = { + return Err(())?; + }; + let _x: () = { + return Err(())?; + //~^ ERROR: unneeded `return` statement with `?` operator + }; + let _x = match 1 { + 1 => vec![1, 2], + _ => { + return Err(())?; + }, + }; + Ok(()) +} diff --git a/src/tools/clippy/tests/ui/needless_return_with_question_mark.stderr b/src/tools/clippy/tests/ui/needless_return_with_question_mark.stderr index 0de063380..17aa212ae 100644 --- a/src/tools/clippy/tests/ui/needless_return_with_question_mark.stderr +++ b/src/tools/clippy/tests/ui/needless_return_with_question_mark.stderr @@ -1,5 +1,5 @@ error: unneeded `return` statement with `?` operator - --> $DIR/needless_return_with_question_mark.rs:27:5 + --> $DIR/needless_return_with_question_mark.rs:29:5 | LL | return Err(())?; | ^^^^^^^ help: remove it @@ -7,5 +7,11 @@ LL | return Err(())?; = note: `-D clippy::needless-return-with-question-mark` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::needless_return_with_question_mark)]` -error: aborting due to previous error +error: unneeded `return` statement with `?` operator + --> $DIR/needless_return_with_question_mark.rs:69:9 + | +LL | return Err(())?; + | ^^^^^^^ help: remove it + +error: aborting due to 2 previous errors diff --git a/src/tools/clippy/tests/ui/needless_update.stderr b/src/tools/clippy/tests/ui/needless_update.stderr index 3e9e2941a..60aeb0493 100644 --- a/src/tools/clippy/tests/ui/needless_update.stderr +++ b/src/tools/clippy/tests/ui/needless_update.stderr @@ -7,5 +7,5 @@ LL | S { a: 1, b: 1, ..base }; = note: `-D clippy::needless-update` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::needless_update)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/new_ret_no_self_overflow.stderr b/src/tools/clippy/tests/ui/new_ret_no_self_overflow.stderr index babb634fd..c0d6a74a5 100644 --- a/src/tools/clippy/tests/ui/new_ret_no_self_overflow.stderr +++ b/src/tools/clippy/tests/ui/new_ret_no_self_overflow.stderr @@ -4,6 +4,6 @@ error[E0275]: overflow evaluating the requirement `<i32 as std::ops::Add>::Outpu LL | pub fn new() -> X { | ^ -error: aborting due to previous error +error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0275`. diff --git a/src/tools/clippy/tests/ui/no_effect.rs b/src/tools/clippy/tests/ui/no_effect.rs index c52f43891..777b1e52c 100644 --- a/src/tools/clippy/tests/ui/no_effect.rs +++ b/src/tools/clippy/tests/ui/no_effect.rs @@ -9,6 +9,30 @@ clippy::useless_vec )] +use std::fmt::Display; +use std::ops::{Neg, Shl}; + +struct Cout; + +impl<T> Shl<T> for Cout +where + T: Display, +{ + type Output = Self; + fn shl(self, rhs: T) -> Self::Output { + println!("{}", rhs); + self + } +} + +impl Neg for Cout { + type Output = Self; + fn neg(self) -> Self::Output { + println!("hello world"); + self + } +} + struct Unit; struct Tuple(i32); struct Struct { @@ -174,4 +198,11 @@ fn main() { GreetStruct1("world"); GreetStruct2()("world"); GreetStruct3 {}("world"); + + fn n() -> i32 { + 42 + } + + Cout << 142; + -Cout; } diff --git a/src/tools/clippy/tests/ui/no_effect.stderr b/src/tools/clippy/tests/ui/no_effect.stderr index feba35697..f5ba234b4 100644 --- a/src/tools/clippy/tests/ui/no_effect.stderr +++ b/src/tools/clippy/tests/ui/no_effect.stderr @@ -1,5 +1,5 @@ error: statement with no effect - --> $DIR/no_effect.rs:98:5 + --> $DIR/no_effect.rs:122:5 | LL | 0; | ^^ @@ -8,151 +8,151 @@ LL | 0; = help: to override `-D warnings` add `#[allow(clippy::no_effect)]` error: statement with no effect - --> $DIR/no_effect.rs:101:5 + --> $DIR/no_effect.rs:125:5 | LL | s2; | ^^^ error: statement with no effect - --> $DIR/no_effect.rs:103:5 + --> $DIR/no_effect.rs:127:5 | LL | Unit; | ^^^^^ error: statement with no effect - --> $DIR/no_effect.rs:105:5 + --> $DIR/no_effect.rs:129:5 | LL | Tuple(0); | ^^^^^^^^^ error: statement with no effect - --> $DIR/no_effect.rs:107:5 + --> $DIR/no_effect.rs:131:5 | LL | Struct { field: 0 }; | ^^^^^^^^^^^^^^^^^^^^ error: statement with no effect - --> $DIR/no_effect.rs:109:5 + --> $DIR/no_effect.rs:133:5 | LL | Struct { ..s }; | ^^^^^^^^^^^^^^^ error: statement with no effect - --> $DIR/no_effect.rs:111:5 + --> $DIR/no_effect.rs:135:5 | LL | Union { a: 0 }; | ^^^^^^^^^^^^^^^ error: statement with no effect - --> $DIR/no_effect.rs:113:5 + --> $DIR/no_effect.rs:137:5 | LL | Enum::Tuple(0); | ^^^^^^^^^^^^^^^ error: statement with no effect - --> $DIR/no_effect.rs:115:5 + --> $DIR/no_effect.rs:139:5 | LL | Enum::Struct { field: 0 }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^ error: statement with no effect - --> $DIR/no_effect.rs:117:5 + --> $DIR/no_effect.rs:141:5 | LL | 5 + 6; | ^^^^^^ error: statement with no effect - --> $DIR/no_effect.rs:119:5 + --> $DIR/no_effect.rs:143:5 | LL | *&42; | ^^^^^ error: statement with no effect - --> $DIR/no_effect.rs:121:5 + --> $DIR/no_effect.rs:145:5 | LL | &6; | ^^^ error: statement with no effect - --> $DIR/no_effect.rs:123:5 + --> $DIR/no_effect.rs:147:5 | LL | (5, 6, 7); | ^^^^^^^^^^ error: statement with no effect - --> $DIR/no_effect.rs:125:5 + --> $DIR/no_effect.rs:149:5 | LL | ..; | ^^^ error: statement with no effect - --> $DIR/no_effect.rs:127:5 + --> $DIR/no_effect.rs:151:5 | LL | 5..; | ^^^^ error: statement with no effect - --> $DIR/no_effect.rs:129:5 + --> $DIR/no_effect.rs:153:5 | LL | ..5; | ^^^^ error: statement with no effect - --> $DIR/no_effect.rs:131:5 + --> $DIR/no_effect.rs:155:5 | LL | 5..6; | ^^^^^ error: statement with no effect - --> $DIR/no_effect.rs:133:5 + --> $DIR/no_effect.rs:157:5 | LL | 5..=6; | ^^^^^^ error: statement with no effect - --> $DIR/no_effect.rs:135:5 + --> $DIR/no_effect.rs:159:5 | LL | [42, 55]; | ^^^^^^^^^ error: statement with no effect - --> $DIR/no_effect.rs:137:5 + --> $DIR/no_effect.rs:161:5 | LL | [42, 55][1]; | ^^^^^^^^^^^^ error: statement with no effect - --> $DIR/no_effect.rs:139:5 + --> $DIR/no_effect.rs:163:5 | LL | (42, 55).1; | ^^^^^^^^^^^ error: statement with no effect - --> $DIR/no_effect.rs:141:5 + --> $DIR/no_effect.rs:165:5 | LL | [42; 55]; | ^^^^^^^^^ error: statement with no effect - --> $DIR/no_effect.rs:143:5 + --> $DIR/no_effect.rs:167:5 | LL | [42; 55][13]; | ^^^^^^^^^^^^^ error: statement with no effect - --> $DIR/no_effect.rs:146:5 + --> $DIR/no_effect.rs:170:5 | LL | || x += 5; | ^^^^^^^^^^ error: statement with no effect - --> $DIR/no_effect.rs:149:5 + --> $DIR/no_effect.rs:173:5 | LL | FooString { s: s }; | ^^^^^^^^^^^^^^^^^^^ error: binding to `_` prefixed variable with no side-effect - --> $DIR/no_effect.rs:151:5 + --> $DIR/no_effect.rs:175:5 | LL | let _unused = 1; | ^^^^^^^^^^^^^^^^ @@ -161,19 +161,19 @@ LL | let _unused = 1; = help: to override `-D warnings` add `#[allow(clippy::no_effect_underscore_binding)]` error: binding to `_` prefixed variable with no side-effect - --> $DIR/no_effect.rs:154:5 + --> $DIR/no_effect.rs:178:5 | LL | let _penguin = || println!("Some helpful closure"); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: binding to `_` prefixed variable with no side-effect - --> $DIR/no_effect.rs:156:5 + --> $DIR/no_effect.rs:180:5 | LL | let _duck = Struct { field: 0 }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: binding to `_` prefixed variable with no side-effect - --> $DIR/no_effect.rs:158:5 + --> $DIR/no_effect.rs:182:5 | LL | let _cat = [2, 4, 6, 8][2]; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ diff --git a/src/tools/clippy/tests/ui/non_minimal_cfg2.stderr b/src/tools/clippy/tests/ui/non_minimal_cfg2.stderr index 001fcddd9..036d38c22 100644 --- a/src/tools/clippy/tests/ui/non_minimal_cfg2.stderr +++ b/src/tools/clippy/tests/ui/non_minimal_cfg2.stderr @@ -7,5 +7,5 @@ LL | #[cfg(all())] = note: `-D clippy::non-minimal-cfg` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::non_minimal_cfg)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/obfuscated_if_else.stderr b/src/tools/clippy/tests/ui/obfuscated_if_else.stderr index ca9f5e1e3..abf5adce4 100644 --- a/src/tools/clippy/tests/ui/obfuscated_if_else.stderr +++ b/src/tools/clippy/tests/ui/obfuscated_if_else.stderr @@ -7,5 +7,5 @@ LL | true.then_some("a").unwrap_or("b"); = note: `-D clippy::obfuscated-if-else` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::obfuscated_if_else)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/option_as_ref_deref.stderr b/src/tools/clippy/tests/ui/option_as_ref_deref.stderr index eb0661c52..9d173e409 100644 --- a/src/tools/clippy/tests/ui/option_as_ref_deref.stderr +++ b/src/tools/clippy/tests/ui/option_as_ref_deref.stderr @@ -1,4 +1,4 @@ -error: called `.as_ref().map(Deref::deref)` on an Option value. This can be done more directly by calling `opt.clone().as_deref()` instead +error: called `.as_ref().map(Deref::deref)` on an `Option` value --> $DIR/option_as_ref_deref.rs:11:13 | LL | let _ = opt.clone().as_ref().map(Deref::deref).map(str::len); @@ -7,7 +7,7 @@ LL | let _ = opt.clone().as_ref().map(Deref::deref).map(str::len); = note: `-D clippy::option-as-ref-deref` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::option_as_ref_deref)]` -error: called `.as_ref().map(Deref::deref)` on an Option value. This can be done more directly by calling `opt.clone().as_deref()` instead +error: called `.as_ref().map(Deref::deref)` on an `Option` value --> $DIR/option_as_ref_deref.rs:14:13 | LL | let _ = opt.clone() @@ -17,97 +17,97 @@ LL | | Deref::deref LL | | ) | |_________^ help: try using as_deref instead: `opt.clone().as_deref()` -error: called `.as_mut().map(DerefMut::deref_mut)` on an Option value. This can be done more directly by calling `opt.as_deref_mut()` instead +error: called `.as_mut().map(DerefMut::deref_mut)` on an `Option` value --> $DIR/option_as_ref_deref.rs:20:13 | LL | let _ = opt.as_mut().map(DerefMut::deref_mut); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try using as_deref_mut instead: `opt.as_deref_mut()` -error: called `.as_ref().map(String::as_str)` on an Option value. This can be done more directly by calling `opt.as_deref()` instead +error: called `.as_ref().map(String::as_str)` on an `Option` value --> $DIR/option_as_ref_deref.rs:22:13 | LL | let _ = opt.as_ref().map(String::as_str); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try using as_deref instead: `opt.as_deref()` -error: called `.as_ref().map(|x| x.as_str())` on an Option value. This can be done more directly by calling `opt.as_deref()` instead +error: called `.as_ref().map(|x| x.as_str())` on an `Option` value --> $DIR/option_as_ref_deref.rs:23:13 | LL | let _ = opt.as_ref().map(|x| x.as_str()); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try using as_deref instead: `opt.as_deref()` -error: called `.as_mut().map(String::as_mut_str)` on an Option value. This can be done more directly by calling `opt.as_deref_mut()` instead +error: called `.as_mut().map(String::as_mut_str)` on an `Option` value --> $DIR/option_as_ref_deref.rs:24:13 | LL | let _ = opt.as_mut().map(String::as_mut_str); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try using as_deref_mut instead: `opt.as_deref_mut()` -error: called `.as_mut().map(|x| x.as_mut_str())` on an Option value. This can be done more directly by calling `opt.as_deref_mut()` instead +error: called `.as_mut().map(|x| x.as_mut_str())` on an `Option` value --> $DIR/option_as_ref_deref.rs:25:13 | LL | let _ = opt.as_mut().map(|x| x.as_mut_str()); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try using as_deref_mut instead: `opt.as_deref_mut()` -error: called `.as_ref().map(CString::as_c_str)` on an Option value. This can be done more directly by calling `Some(CString::new(vec![]).unwrap()).as_deref()` instead +error: called `.as_ref().map(CString::as_c_str)` on an `Option` value --> $DIR/option_as_ref_deref.rs:26:13 | LL | let _ = Some(CString::new(vec![]).unwrap()).as_ref().map(CString::as_c_str); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try using as_deref instead: `Some(CString::new(vec![]).unwrap()).as_deref()` -error: called `.as_ref().map(OsString::as_os_str)` on an Option value. This can be done more directly by calling `Some(OsString::new()).as_deref()` instead +error: called `.as_ref().map(OsString::as_os_str)` on an `Option` value --> $DIR/option_as_ref_deref.rs:27:13 | LL | let _ = Some(OsString::new()).as_ref().map(OsString::as_os_str); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try using as_deref instead: `Some(OsString::new()).as_deref()` -error: called `.as_ref().map(PathBuf::as_path)` on an Option value. This can be done more directly by calling `Some(PathBuf::new()).as_deref()` instead +error: called `.as_ref().map(PathBuf::as_path)` on an `Option` value --> $DIR/option_as_ref_deref.rs:28:13 | LL | let _ = Some(PathBuf::new()).as_ref().map(PathBuf::as_path); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try using as_deref instead: `Some(PathBuf::new()).as_deref()` -error: called `.as_ref().map(Vec::as_slice)` on an Option value. This can be done more directly by calling `Some(Vec::<()>::new()).as_deref()` instead +error: called `.as_ref().map(Vec::as_slice)` on an `Option` value --> $DIR/option_as_ref_deref.rs:29:13 | LL | let _ = Some(Vec::<()>::new()).as_ref().map(Vec::as_slice); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try using as_deref instead: `Some(Vec::<()>::new()).as_deref()` -error: called `.as_mut().map(Vec::as_mut_slice)` on an Option value. This can be done more directly by calling `Some(Vec::<()>::new()).as_deref_mut()` instead +error: called `.as_mut().map(Vec::as_mut_slice)` on an `Option` value --> $DIR/option_as_ref_deref.rs:30:13 | LL | let _ = Some(Vec::<()>::new()).as_mut().map(Vec::as_mut_slice); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try using as_deref_mut instead: `Some(Vec::<()>::new()).as_deref_mut()` -error: called `.as_ref().map(|x| x.deref())` on an Option value. This can be done more directly by calling `opt.as_deref()` instead +error: called `.as_ref().map(|x| x.deref())` on an `Option` value --> $DIR/option_as_ref_deref.rs:32:13 | LL | let _ = opt.as_ref().map(|x| x.deref()); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try using as_deref instead: `opt.as_deref()` -error: called `.as_mut().map(|x| x.deref_mut())` on an Option value. This can be done more directly by calling `opt.clone().as_deref_mut()` instead +error: called `.as_mut().map(|x| x.deref_mut())` on an `Option` value --> $DIR/option_as_ref_deref.rs:33:13 | LL | let _ = opt.clone().as_mut().map(|x| x.deref_mut()).map(|x| x.len()); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try using as_deref_mut instead: `opt.clone().as_deref_mut()` -error: called `.as_ref().map(|x| &**x)` on an Option value. This can be done more directly by calling `opt.as_deref()` instead +error: called `.as_ref().map(|x| &**x)` on an `Option` value --> $DIR/option_as_ref_deref.rs:40:13 | LL | let _ = opt.as_ref().map(|x| &**x); | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try using as_deref instead: `opt.as_deref()` -error: called `.as_mut().map(|x| &mut **x)` on an Option value. This can be done more directly by calling `opt.as_deref_mut()` instead +error: called `.as_mut().map(|x| &mut **x)` on an `Option` value --> $DIR/option_as_ref_deref.rs:41:13 | LL | let _ = opt.as_mut().map(|x| &mut **x); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try using as_deref_mut instead: `opt.as_deref_mut()` -error: called `.as_ref().map(std::ops::Deref::deref)` on an Option value. This can be done more directly by calling `opt.as_deref()` instead +error: called `.as_ref().map(std::ops::Deref::deref)` on an `Option` value --> $DIR/option_as_ref_deref.rs:44:13 | LL | let _ = opt.as_ref().map(std::ops::Deref::deref); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try using as_deref instead: `opt.as_deref()` -error: called `.as_ref().map(String::as_str)` on an Option value. This can be done more directly by calling `opt.as_deref()` instead +error: called `.as_ref().map(String::as_str)` on an `Option` value --> $DIR/option_as_ref_deref.rs:56:13 | LL | let _ = opt.as_ref().map(String::as_str); diff --git a/src/tools/clippy/tests/ui/option_if_let_else.fixed b/src/tools/clippy/tests/ui/option_if_let_else.fixed index f0113ca69..363520112 100644 --- a/src/tools/clippy/tests/ui/option_if_let_else.fixed +++ b/src/tools/clippy/tests/ui/option_if_let_else.fixed @@ -92,11 +92,13 @@ fn pattern_to_vec(pattern: &str) -> Vec<String> { } // #10335 -fn test_result_impure_else(variable: Result<u32, &str>) { +fn test_result_impure_else(variable: Result<u32, &str>) -> bool { variable.map_or_else(|_| { println!("Err"); + false }, |binding| { println!("Ok {binding}"); + true }) } @@ -213,15 +215,19 @@ mod issue10729 { pub fn reproduce(initial: &Option<String>) { // 👇 needs `.as_ref()` because initial is an `&Option<_>` - initial.as_ref().map_or({}, |value| do_something(value)) + let _ = initial.as_ref().map_or(42, |value| do_something(value)); } pub fn reproduce2(initial: &mut Option<String>) { - initial.as_mut().map_or({}, |value| do_something2(value)) + let _ = initial.as_mut().map_or(42, |value| do_something2(value)); } - fn do_something(_value: &str) {} - fn do_something2(_value: &mut str) {} + fn do_something(_value: &str) -> u32 { + todo!() + } + fn do_something2(_value: &mut str) -> u32 { + todo!() + } } fn issue11429() { @@ -237,3 +243,13 @@ fn issue11429() { let mut _hm = opt.as_ref().map_or_else(|| new_map!(), |hm| hm.clone()); } + +fn issue11893() { + use std::io::Write; + let mut output = std::io::stdout().lock(); + if let Some(name) = Some("stuff") { + writeln!(output, "{name:?}").unwrap(); + } else { + panic!("Haven't thought about this condition."); + } +} diff --git a/src/tools/clippy/tests/ui/option_if_let_else.rs b/src/tools/clippy/tests/ui/option_if_let_else.rs index 18b7af443..aaa87a0db 100644 --- a/src/tools/clippy/tests/ui/option_if_let_else.rs +++ b/src/tools/clippy/tests/ui/option_if_let_else.rs @@ -115,11 +115,13 @@ fn pattern_to_vec(pattern: &str) -> Vec<String> { } // #10335 -fn test_result_impure_else(variable: Result<u32, &str>) { +fn test_result_impure_else(variable: Result<u32, &str>) -> bool { if let Ok(binding) = variable { println!("Ok {binding}"); + true } else { println!("Err"); + false } } @@ -254,21 +256,25 @@ mod issue10729 { pub fn reproduce(initial: &Option<String>) { // 👇 needs `.as_ref()` because initial is an `&Option<_>` - match initial { + let _ = match initial { Some(value) => do_something(value), - None => {}, - } + None => 42, + }; } pub fn reproduce2(initial: &mut Option<String>) { - match initial { + let _ = match initial { Some(value) => do_something2(value), - None => {}, - } + None => 42, + }; } - fn do_something(_value: &str) {} - fn do_something2(_value: &mut str) {} + fn do_something(_value: &str) -> u32 { + todo!() + } + fn do_something2(_value: &mut str) -> u32 { + todo!() + } } fn issue11429() { @@ -288,3 +294,13 @@ fn issue11429() { let mut _hm = if let Some(hm) = &opt { hm.clone() } else { new_map!() }; } + +fn issue11893() { + use std::io::Write; + let mut output = std::io::stdout().lock(); + if let Some(name) = Some("stuff") { + writeln!(output, "{name:?}").unwrap(); + } else { + panic!("Haven't thought about this condition."); + } +} diff --git a/src/tools/clippy/tests/ui/option_if_let_else.stderr b/src/tools/clippy/tests/ui/option_if_let_else.stderr index e36357bcb..55a8360ff 100644 --- a/src/tools/clippy/tests/ui/option_if_let_else.stderr +++ b/src/tools/clippy/tests/ui/option_if_let_else.stderr @@ -158,8 +158,10 @@ error: use Option::map_or_else instead of an if let/else | LL | / if let Ok(binding) = variable { LL | | println!("Ok {binding}"); +LL | | true LL | | } else { LL | | println!("Err"); +LL | | false LL | | } | |_____^ | @@ -167,19 +169,21 @@ help: try | LL ~ variable.map_or_else(|_| { LL + println!("Err"); +LL + false LL + }, |binding| { LL + println!("Ok {binding}"); +LL + true LL + }) | error: use Option::map_or instead of an if let/else - --> $DIR/option_if_let_else.rs:141:13 + --> $DIR/option_if_let_else.rs:143:13 | LL | let _ = if let Some(x) = optional { x + 2 } else { 5 }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `optional.map_or(5, |x| x + 2)` error: use Option::map_or instead of an if let/else - --> $DIR/option_if_let_else.rs:151:13 + --> $DIR/option_if_let_else.rs:153:13 | LL | let _ = if let Some(x) = Some(0) { | _____________^ @@ -201,13 +205,13 @@ LL ~ }); | error: use Option::map_or instead of an if let/else - --> $DIR/option_if_let_else.rs:179:13 + --> $DIR/option_if_let_else.rs:181:13 | LL | let _ = if let Some(x) = Some(0) { s.len() + x } else { s.len() }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `Some(0).map_or(s.len(), |x| s.len() + x)` error: use Option::map_or instead of an if let/else - --> $DIR/option_if_let_else.rs:183:13 + --> $DIR/option_if_let_else.rs:185:13 | LL | let _ = if let Some(x) = Some(0) { | _____________^ @@ -227,7 +231,7 @@ LL ~ }); | error: use Option::map_or instead of an if let/else - --> $DIR/option_if_let_else.rs:222:13 + --> $DIR/option_if_let_else.rs:224:13 | LL | let _ = match s { | _____________^ @@ -237,7 +241,7 @@ LL | | }; | |_____^ help: try: `s.map_or(1, |string| string.len())` error: use Option::map_or instead of an if let/else - --> $DIR/option_if_let_else.rs:226:13 + --> $DIR/option_if_let_else.rs:228:13 | LL | let _ = match Some(10) { | _____________^ @@ -247,7 +251,7 @@ LL | | }; | |_____^ help: try: `Some(10).map_or(5, |a| a + 1)` error: use Option::map_or instead of an if let/else - --> $DIR/option_if_let_else.rs:232:13 + --> $DIR/option_if_let_else.rs:234:13 | LL | let _ = match res { | _____________^ @@ -257,7 +261,7 @@ LL | | }; | |_____^ help: try: `res.map_or(1, |a| a + 1)` error: use Option::map_or instead of an if let/else - --> $DIR/option_if_let_else.rs:236:13 + --> $DIR/option_if_let_else.rs:238:13 | LL | let _ = match res { | _____________^ @@ -267,31 +271,33 @@ LL | | }; | |_____^ help: try: `res.map_or(1, |a| a + 1)` error: use Option::map_or instead of an if let/else - --> $DIR/option_if_let_else.rs:240:13 + --> $DIR/option_if_let_else.rs:242:13 | LL | let _ = if let Ok(a) = res { a + 1 } else { 5 }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `res.map_or(5, |a| a + 1)` error: use Option::map_or instead of an if let/else - --> $DIR/option_if_let_else.rs:257:9 + --> $DIR/option_if_let_else.rs:259:17 | -LL | / match initial { +LL | let _ = match initial { + | _________________^ LL | | Some(value) => do_something(value), -LL | | None => {}, -LL | | } - | |_________^ help: try: `initial.as_ref().map_or({}, |value| do_something(value))` +LL | | None => 42, +LL | | }; + | |_________^ help: try: `initial.as_ref().map_or(42, |value| do_something(value))` error: use Option::map_or instead of an if let/else - --> $DIR/option_if_let_else.rs:264:9 + --> $DIR/option_if_let_else.rs:266:17 | -LL | / match initial { +LL | let _ = match initial { + | _________________^ LL | | Some(value) => do_something2(value), -LL | | None => {}, -LL | | } - | |_________^ help: try: `initial.as_mut().map_or({}, |value| do_something2(value))` +LL | | None => 42, +LL | | }; + | |_________^ help: try: `initial.as_mut().map_or(42, |value| do_something2(value))` error: use Option::map_or_else instead of an if let/else - --> $DIR/option_if_let_else.rs:283:24 + --> $DIR/option_if_let_else.rs:289:24 | LL | let mut _hashmap = if let Some(hm) = &opt { | ________________________^ @@ -302,7 +308,7 @@ LL | | }; | |_____^ help: try: `opt.as_ref().map_or_else(HashMap::new, |hm| hm.clone())` error: use Option::map_or_else instead of an if let/else - --> $DIR/option_if_let_else.rs:289:19 + --> $DIR/option_if_let_else.rs:295:19 | LL | let mut _hm = if let Some(hm) = &opt { hm.clone() } else { new_map!() }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `opt.as_ref().map_or_else(|| new_map!(), |hm| hm.clone())` diff --git a/src/tools/clippy/tests/ui/option_map_or_err_ok.fixed b/src/tools/clippy/tests/ui/option_map_or_err_ok.fixed new file mode 100644 index 000000000..131f4b209 --- /dev/null +++ b/src/tools/clippy/tests/ui/option_map_or_err_ok.fixed @@ -0,0 +1,7 @@ +#![warn(clippy::option_map_or_err_ok)] + +fn main() { + let x = Some("a"); + let _ = x.ok_or("a"); + //~^ ERROR: called `map_or(Err(_), Ok)` on an `Option` value +} diff --git a/src/tools/clippy/tests/ui/option_map_or_err_ok.rs b/src/tools/clippy/tests/ui/option_map_or_err_ok.rs new file mode 100644 index 000000000..0f07a592a --- /dev/null +++ b/src/tools/clippy/tests/ui/option_map_or_err_ok.rs @@ -0,0 +1,7 @@ +#![warn(clippy::option_map_or_err_ok)] + +fn main() { + let x = Some("a"); + let _ = x.map_or(Err("a"), Ok); + //~^ ERROR: called `map_or(Err(_), Ok)` on an `Option` value +} diff --git a/src/tools/clippy/tests/ui/option_map_or_err_ok.stderr b/src/tools/clippy/tests/ui/option_map_or_err_ok.stderr new file mode 100644 index 000000000..a193e3c4c --- /dev/null +++ b/src/tools/clippy/tests/ui/option_map_or_err_ok.stderr @@ -0,0 +1,11 @@ +error: called `map_or(Err(_), Ok)` on an `Option` value + --> $DIR/option_map_or_err_ok.rs:5:13 + | +LL | let _ = x.map_or(Err("a"), Ok); + | ^^^^^^^^^^^^^^^^^^^^^^ help: try using `ok_or` instead: `x.ok_or("a")` + | + = note: `-D clippy::option-map-or-err-ok` implied by `-D warnings` + = help: to override `-D warnings` add `#[allow(clippy::option_map_or_err_ok)]` + +error: aborting due to 1 previous error + diff --git a/src/tools/clippy/tests/ui/option_map_or_none.stderr b/src/tools/clippy/tests/ui/option_map_or_none.stderr index fa150718f..f2cfc3f9a 100644 --- a/src/tools/clippy/tests/ui/option_map_or_none.stderr +++ b/src/tools/clippy/tests/ui/option_map_or_none.stderr @@ -1,4 +1,4 @@ -error: called `map_or(None, ..)` on an `Option` value. This can be done more directly by calling `map(..)` instead +error: called `map_or(None, ..)` on an `Option` value --> $DIR/option_map_or_none.rs:10:26 | LL | let _: Option<i32> = opt.map_or(None, |x| Some(x + 1)); @@ -7,7 +7,7 @@ LL | let _: Option<i32> = opt.map_or(None, |x| Some(x + 1)); = note: `-D clippy::option-map-or-none` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::option_map_or_none)]` -error: called `map_or(None, ..)` on an `Option` value. This can be done more directly by calling `map(..)` instead +error: called `map_or(None, ..)` on an `Option` value --> $DIR/option_map_or_none.rs:13:26 | LL | let _: Option<i32> = opt.map_or(None, |x| { @@ -16,13 +16,13 @@ LL | | Some(x + 1) LL | | }); | |_________________________^ help: try using `map` instead: `opt.map(|x| x + 1)` -error: called `map_or(None, ..)` on an `Option` value. This can be done more directly by calling `and_then(..)` instead +error: called `map_or(None, ..)` on an `Option` value --> $DIR/option_map_or_none.rs:17:26 | LL | let _: Option<i32> = opt.map_or(None, bar); | ^^^^^^^^^^^^^^^^^^^^^ help: try using `and_then` instead: `opt.and_then(bar)` -error: called `map_or(None, ..)` on an `Option` value. This can be done more directly by calling `and_then(..)` instead +error: called `map_or(None, ..)` on an `Option` value --> $DIR/option_map_or_none.rs:18:26 | LL | let _: Option<i32> = opt.map_or(None, |x| { @@ -42,7 +42,7 @@ LL + Some(offset + height) LL ~ }); | -error: called `map_or(None, Some)` on a `Result` value. This can be done more directly by calling `ok()` instead +error: called `map_or(None, Some)` on a `Result` value --> $DIR/option_map_or_none.rs:25:26 | LL | let _: Option<i32> = r.map_or(None, Some); diff --git a/src/tools/clippy/tests/ui/partialeq_ne_impl.stderr b/src/tools/clippy/tests/ui/partialeq_ne_impl.stderr index 163d6b1dd..2210e706d 100644 --- a/src/tools/clippy/tests/ui/partialeq_ne_impl.stderr +++ b/src/tools/clippy/tests/ui/partialeq_ne_impl.stderr @@ -11,5 +11,5 @@ LL | | } = note: `-D clippy::partialeq-ne-impl` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::partialeq_ne_impl)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/path_buf_push_overwrite.stderr b/src/tools/clippy/tests/ui/path_buf_push_overwrite.stderr index 1453d020c..f96ce0de7 100644 --- a/src/tools/clippy/tests/ui/path_buf_push_overwrite.stderr +++ b/src/tools/clippy/tests/ui/path_buf_push_overwrite.stderr @@ -7,5 +7,5 @@ LL | x.push("/bar"); = note: `-D clippy::path-buf-push-overwrite` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::path_buf_push_overwrite)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/permissions_set_readonly_false.stderr b/src/tools/clippy/tests/ui/permissions_set_readonly_false.stderr index 58a7de84d..bd3446308 100644 --- a/src/tools/clippy/tests/ui/permissions_set_readonly_false.stderr +++ b/src/tools/clippy/tests/ui/permissions_set_readonly_false.stderr @@ -10,5 +10,5 @@ LL | permissions.set_readonly(false); = note: `-D clippy::permissions-set-readonly-false` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::permissions_set_readonly_false)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/proc_macro.stderr b/src/tools/clippy/tests/ui/proc_macro.stderr index d912b5027..122374ea8 100644 --- a/src/tools/clippy/tests/ui/proc_macro.stderr +++ b/src/tools/clippy/tests/ui/proc_macro.stderr @@ -7,5 +7,5 @@ LL | let _x = 3.14; = help: consider using the constant directly = note: `#[deny(clippy::approx_constant)]` on by default -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/ptr_arg.rs b/src/tools/clippy/tests/ui/ptr_arg.rs index 91e2e7fd6..fcd716f41 100644 --- a/src/tools/clippy/tests/ui/ptr_arg.rs +++ b/src/tools/clippy/tests/ui/ptr_arg.rs @@ -22,6 +22,12 @@ fn do_vec_mut(x: &mut Vec<i64>) { //Nothing here } +fn do_vec_mut2(x: &mut Vec<i64>) { + //~^ ERROR: writing `&mut Vec` instead of `&mut [_]` involves a new object where a slice w + x.len(); + x.is_empty(); +} + fn do_str(x: &String) { //~^ ERROR: writing `&String` instead of `&str` involves a new object where a slice will d //Nothing here either diff --git a/src/tools/clippy/tests/ui/ptr_arg.stderr b/src/tools/clippy/tests/ui/ptr_arg.stderr index cccf2d62d..35bd85092 100644 --- a/src/tools/clippy/tests/ui/ptr_arg.stderr +++ b/src/tools/clippy/tests/ui/ptr_arg.stderr @@ -13,38 +13,44 @@ error: writing `&mut Vec` instead of `&mut [_]` involves a new object where a sl LL | fn do_vec_mut(x: &mut Vec<i64>) { | ^^^^^^^^^^^^^ help: change this to: `&mut [i64]` +error: writing `&mut Vec` instead of `&mut [_]` involves a new object where a slice will do + --> $DIR/ptr_arg.rs:25:19 + | +LL | fn do_vec_mut2(x: &mut Vec<i64>) { + | ^^^^^^^^^^^^^ help: change this to: `&mut [i64]` + error: writing `&String` instead of `&str` involves a new object where a slice will do - --> $DIR/ptr_arg.rs:25:14 + --> $DIR/ptr_arg.rs:31:14 | LL | fn do_str(x: &String) { | ^^^^^^^ help: change this to: `&str` error: writing `&mut String` instead of `&mut str` involves a new object where a slice will do - --> $DIR/ptr_arg.rs:30:18 + --> $DIR/ptr_arg.rs:36:18 | LL | fn do_str_mut(x: &mut String) { | ^^^^^^^^^^^ help: change this to: `&mut str` error: writing `&PathBuf` instead of `&Path` involves a new object where a slice will do - --> $DIR/ptr_arg.rs:35:15 + --> $DIR/ptr_arg.rs:41:15 | LL | fn do_path(x: &PathBuf) { | ^^^^^^^^ help: change this to: `&Path` error: writing `&mut PathBuf` instead of `&mut Path` involves a new object where a slice will do - --> $DIR/ptr_arg.rs:40:19 + --> $DIR/ptr_arg.rs:46:19 | LL | fn do_path_mut(x: &mut PathBuf) { | ^^^^^^^^^^^^ help: change this to: `&mut Path` error: writing `&Vec` instead of `&[_]` involves a new object where a slice will do - --> $DIR/ptr_arg.rs:49:18 + --> $DIR/ptr_arg.rs:55:18 | LL | fn do_vec(x: &Vec<i64>); | ^^^^^^^^^ help: change this to: `&[i64]` error: writing `&Vec` instead of `&[_]` involves a new object where a slice will do - --> $DIR/ptr_arg.rs:63:14 + --> $DIR/ptr_arg.rs:69:14 | LL | fn cloned(x: &Vec<u8>) -> Vec<u8> { | ^^^^^^^^ @@ -62,7 +68,7 @@ LL ~ x.to_owned() | error: writing `&String` instead of `&str` involves a new object where a slice will do - --> $DIR/ptr_arg.rs:73:18 + --> $DIR/ptr_arg.rs:79:18 | LL | fn str_cloned(x: &String) -> String { | ^^^^^^^ @@ -79,7 +85,7 @@ LL ~ x.to_owned() | error: writing `&PathBuf` instead of `&Path` involves a new object where a slice will do - --> $DIR/ptr_arg.rs:82:19 + --> $DIR/ptr_arg.rs:88:19 | LL | fn path_cloned(x: &PathBuf) -> PathBuf { | ^^^^^^^^ @@ -96,7 +102,7 @@ LL ~ x.to_path_buf() | error: writing `&String` instead of `&str` involves a new object where a slice will do - --> $DIR/ptr_arg.rs:91:44 + --> $DIR/ptr_arg.rs:97:44 | LL | fn false_positive_capacity(x: &Vec<u8>, y: &String) { | ^^^^^^^ @@ -111,19 +117,19 @@ LL ~ let c = y; | error: using a reference to `Cow` is not recommended - --> $DIR/ptr_arg.rs:106:25 + --> $DIR/ptr_arg.rs:112:25 | LL | fn test_cow_with_ref(c: &Cow<[i32]>) {} | ^^^^^^^^^^^ help: change this to: `&[i32]` error: writing `&String` instead of `&str` involves a new object where a slice will do - --> $DIR/ptr_arg.rs:136:66 + --> $DIR/ptr_arg.rs:142:66 | LL | fn some_allowed(#[allow(clippy::ptr_arg)] _v: &Vec<u32>, _s: &String) {} | ^^^^^^^ help: change this to: `&str` error: writing `&Vec` instead of `&[_]` involves a new object where a slice will do - --> $DIR/ptr_arg.rs:166:21 + --> $DIR/ptr_arg.rs:172:21 | LL | fn foo_vec(vec: &Vec<u8>) { | ^^^^^^^^ @@ -137,7 +143,7 @@ LL ~ let _ = vec.to_owned().clone(); | error: writing `&PathBuf` instead of `&Path` involves a new object where a slice will do - --> $DIR/ptr_arg.rs:172:23 + --> $DIR/ptr_arg.rs:178:23 | LL | fn foo_path(path: &PathBuf) { | ^^^^^^^^ @@ -151,7 +157,7 @@ LL ~ let _ = path.to_path_buf().clone(); | error: writing `&PathBuf` instead of `&Path` involves a new object where a slice will do - --> $DIR/ptr_arg.rs:178:21 + --> $DIR/ptr_arg.rs:184:21 | LL | fn foo_str(str: &PathBuf) { | ^^^^^^^^ @@ -165,46 +171,46 @@ LL ~ let _ = str.to_path_buf().clone(); | error: writing `&mut Vec` instead of `&mut [_]` involves a new object where a slice will do - --> $DIR/ptr_arg.rs:185:29 + --> $DIR/ptr_arg.rs:191:29 | LL | fn mut_vec_slice_methods(v: &mut Vec<u32>) { | ^^^^^^^^^^^^^ help: change this to: `&mut [u32]` error: writing `&mut Vec` instead of `&mut [_]` involves a new object where a slice will do - --> $DIR/ptr_arg.rs:248:17 + --> $DIR/ptr_arg.rs:254:17 | LL | fn dyn_trait(a: &mut Vec<u32>, b: &mut String, c: &mut PathBuf) { | ^^^^^^^^^^^^^ help: change this to: `&mut [u32]` error: writing `&mut String` instead of `&mut str` involves a new object where a slice will do - --> $DIR/ptr_arg.rs:248:35 + --> $DIR/ptr_arg.rs:254:35 | LL | fn dyn_trait(a: &mut Vec<u32>, b: &mut String, c: &mut PathBuf) { | ^^^^^^^^^^^ help: change this to: `&mut str` error: writing `&mut PathBuf` instead of `&mut Path` involves a new object where a slice will do - --> $DIR/ptr_arg.rs:248:51 + --> $DIR/ptr_arg.rs:254:51 | LL | fn dyn_trait(a: &mut Vec<u32>, b: &mut String, c: &mut PathBuf) { | ^^^^^^^^^^^^ help: change this to: `&mut Path` error: using a reference to `Cow` is not recommended - --> $DIR/ptr_arg.rs:274:39 + --> $DIR/ptr_arg.rs:280:39 | LL | fn cow_elided_lifetime<'a>(input: &'a Cow<str>) -> &'a str { | ^^^^^^^^^^^^ help: change this to: `&str` error: using a reference to `Cow` is not recommended - --> $DIR/ptr_arg.rs:280:36 + --> $DIR/ptr_arg.rs:286:36 | LL | fn cow_bad_ret_ty_1<'a>(input: &'a Cow<'a, str>) -> &'static str { | ^^^^^^^^^^^^^^^^ help: change this to: `&str` error: using a reference to `Cow` is not recommended - --> $DIR/ptr_arg.rs:284:40 + --> $DIR/ptr_arg.rs:290:40 | LL | fn cow_bad_ret_ty_2<'a, 'b>(input: &'a Cow<'a, str>) -> &'b str { | ^^^^^^^^^^^^^^^^ help: change this to: `&str` -error: aborting due to 23 previous errors +error: aborting due to 24 previous errors diff --git a/src/tools/clippy/tests/ui/ptr_as_ptr.fixed b/src/tools/clippy/tests/ui/ptr_as_ptr.fixed index ca13b52ae..fa15c3235 100644 --- a/src/tools/clippy/tests/ui/ptr_as_ptr.fixed +++ b/src/tools/clippy/tests/ui/ptr_as_ptr.fixed @@ -71,3 +71,118 @@ fn _msrv_1_38() { let _ = ptr.cast::<i32>(); let _ = mut_ptr.cast::<i32>(); } + +#[allow(clippy::unnecessary_cast)] +mod null { + fn use_path_mut() -> *mut u32 { + use std::ptr; + ptr::null_mut::<u32>() + } + + fn full_path_mut() -> *mut u32 { + std::ptr::null_mut::<u32>() + } + + fn core_path_mut() -> *mut u32 { + use core::ptr; + ptr::null_mut::<u32>() + } + + fn full_core_path_mut() -> *mut u32 { + core::ptr::null_mut::<u32>() + } + + fn use_path() -> *const u32 { + use std::ptr; + ptr::null::<u32>() + } + + fn full_path() -> *const u32 { + std::ptr::null::<u32>() + } + + fn core_path() -> *const u32 { + use core::ptr; + ptr::null::<u32>() + } + + fn full_core_path() -> *const u32 { + core::ptr::null::<u32>() + } +} + +mod null_ptr_infer { + fn use_path_mut() -> *mut u32 { + use std::ptr; + ptr::null_mut() + } + + fn full_path_mut() -> *mut u32 { + std::ptr::null_mut() + } + + fn core_path_mut() -> *mut u32 { + use core::ptr; + ptr::null_mut() + } + + fn full_core_path_mut() -> *mut u32 { + core::ptr::null_mut() + } + + fn use_path() -> *const u32 { + use std::ptr; + ptr::null() + } + + fn full_path() -> *const u32 { + std::ptr::null() + } + + fn core_path() -> *const u32 { + use core::ptr; + ptr::null() + } + + fn full_core_path() -> *const u32 { + core::ptr::null() + } +} + +mod null_entire_infer { + fn use_path_mut() -> *mut u32 { + use std::ptr; + ptr::null_mut() + } + + fn full_path_mut() -> *mut u32 { + std::ptr::null_mut() + } + + fn core_path_mut() -> *mut u32 { + use core::ptr; + ptr::null_mut() + } + + fn full_core_path_mut() -> *mut u32 { + core::ptr::null_mut() + } + + fn use_path() -> *const u32 { + use std::ptr; + ptr::null() + } + + fn full_path() -> *const u32 { + std::ptr::null() + } + + fn core_path() -> *const u32 { + use core::ptr; + ptr::null() + } + + fn full_core_path() -> *const u32 { + core::ptr::null() + } +} diff --git a/src/tools/clippy/tests/ui/ptr_as_ptr.rs b/src/tools/clippy/tests/ui/ptr_as_ptr.rs index 942c87344..7ab52e63d 100644 --- a/src/tools/clippy/tests/ui/ptr_as_ptr.rs +++ b/src/tools/clippy/tests/ui/ptr_as_ptr.rs @@ -71,3 +71,118 @@ fn _msrv_1_38() { let _ = ptr as *const i32; let _ = mut_ptr as *mut i32; } + +#[allow(clippy::unnecessary_cast)] +mod null { + fn use_path_mut() -> *mut u32 { + use std::ptr; + ptr::null_mut() as *mut u32 + } + + fn full_path_mut() -> *mut u32 { + std::ptr::null_mut() as *mut u32 + } + + fn core_path_mut() -> *mut u32 { + use core::ptr; + ptr::null_mut() as *mut u32 + } + + fn full_core_path_mut() -> *mut u32 { + core::ptr::null_mut() as *mut u32 + } + + fn use_path() -> *const u32 { + use std::ptr; + ptr::null() as *const u32 + } + + fn full_path() -> *const u32 { + std::ptr::null() as *const u32 + } + + fn core_path() -> *const u32 { + use core::ptr; + ptr::null() as *const u32 + } + + fn full_core_path() -> *const u32 { + core::ptr::null() as *const u32 + } +} + +mod null_ptr_infer { + fn use_path_mut() -> *mut u32 { + use std::ptr; + ptr::null_mut() as *mut _ + } + + fn full_path_mut() -> *mut u32 { + std::ptr::null_mut() as *mut _ + } + + fn core_path_mut() -> *mut u32 { + use core::ptr; + ptr::null_mut() as *mut _ + } + + fn full_core_path_mut() -> *mut u32 { + core::ptr::null_mut() as *mut _ + } + + fn use_path() -> *const u32 { + use std::ptr; + ptr::null() as *const _ + } + + fn full_path() -> *const u32 { + std::ptr::null() as *const _ + } + + fn core_path() -> *const u32 { + use core::ptr; + ptr::null() as *const _ + } + + fn full_core_path() -> *const u32 { + core::ptr::null() as *const _ + } +} + +mod null_entire_infer { + fn use_path_mut() -> *mut u32 { + use std::ptr; + ptr::null_mut() as _ + } + + fn full_path_mut() -> *mut u32 { + std::ptr::null_mut() as _ + } + + fn core_path_mut() -> *mut u32 { + use core::ptr; + ptr::null_mut() as _ + } + + fn full_core_path_mut() -> *mut u32 { + core::ptr::null_mut() as _ + } + + fn use_path() -> *const u32 { + use std::ptr; + ptr::null() as _ + } + + fn full_path() -> *const u32 { + std::ptr::null() as _ + } + + fn core_path() -> *const u32 { + use core::ptr; + ptr::null() as _ + } + + fn full_core_path() -> *const u32 { + core::ptr::null() as _ + } +} diff --git a/src/tools/clippy/tests/ui/ptr_as_ptr.stderr b/src/tools/clippy/tests/ui/ptr_as_ptr.stderr index c0ce69b43..ef64347e9 100644 --- a/src/tools/clippy/tests/ui/ptr_as_ptr.stderr +++ b/src/tools/clippy/tests/ui/ptr_as_ptr.stderr @@ -57,5 +57,149 @@ error: `as` casting between raw pointers without changing its mutability LL | let _ = mut_ptr as *mut i32; | ^^^^^^^^^^^^^^^^^^^ help: try `pointer::cast`, a safer alternative: `mut_ptr.cast::<i32>()` -error: aborting due to 9 previous errors +error: `as` casting between raw pointers without changing its mutability + --> $DIR/ptr_as_ptr.rs:79:9 + | +LL | ptr::null_mut() as *mut u32 + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try call directly: `ptr::null_mut::<u32>()` + +error: `as` casting between raw pointers without changing its mutability + --> $DIR/ptr_as_ptr.rs:83:9 + | +LL | std::ptr::null_mut() as *mut u32 + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try call directly: `std::ptr::null_mut::<u32>()` + +error: `as` casting between raw pointers without changing its mutability + --> $DIR/ptr_as_ptr.rs:88:9 + | +LL | ptr::null_mut() as *mut u32 + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try call directly: `ptr::null_mut::<u32>()` + +error: `as` casting between raw pointers without changing its mutability + --> $DIR/ptr_as_ptr.rs:92:9 + | +LL | core::ptr::null_mut() as *mut u32 + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try call directly: `core::ptr::null_mut::<u32>()` + +error: `as` casting between raw pointers without changing its mutability + --> $DIR/ptr_as_ptr.rs:97:9 + | +LL | ptr::null() as *const u32 + | ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try call directly: `ptr::null::<u32>()` + +error: `as` casting between raw pointers without changing its mutability + --> $DIR/ptr_as_ptr.rs:101:9 + | +LL | std::ptr::null() as *const u32 + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try call directly: `std::ptr::null::<u32>()` + +error: `as` casting between raw pointers without changing its mutability + --> $DIR/ptr_as_ptr.rs:106:9 + | +LL | ptr::null() as *const u32 + | ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try call directly: `ptr::null::<u32>()` + +error: `as` casting between raw pointers without changing its mutability + --> $DIR/ptr_as_ptr.rs:110:9 + | +LL | core::ptr::null() as *const u32 + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try call directly: `core::ptr::null::<u32>()` + +error: `as` casting between raw pointers without changing its mutability + --> $DIR/ptr_as_ptr.rs:117:9 + | +LL | ptr::null_mut() as *mut _ + | ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try call directly: `ptr::null_mut()` + +error: `as` casting between raw pointers without changing its mutability + --> $DIR/ptr_as_ptr.rs:121:9 + | +LL | std::ptr::null_mut() as *mut _ + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try call directly: `std::ptr::null_mut()` + +error: `as` casting between raw pointers without changing its mutability + --> $DIR/ptr_as_ptr.rs:126:9 + | +LL | ptr::null_mut() as *mut _ + | ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try call directly: `ptr::null_mut()` + +error: `as` casting between raw pointers without changing its mutability + --> $DIR/ptr_as_ptr.rs:130:9 + | +LL | core::ptr::null_mut() as *mut _ + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try call directly: `core::ptr::null_mut()` + +error: `as` casting between raw pointers without changing its mutability + --> $DIR/ptr_as_ptr.rs:135:9 + | +LL | ptr::null() as *const _ + | ^^^^^^^^^^^^^^^^^^^^^^^ help: try call directly: `ptr::null()` + +error: `as` casting between raw pointers without changing its mutability + --> $DIR/ptr_as_ptr.rs:139:9 + | +LL | std::ptr::null() as *const _ + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try call directly: `std::ptr::null()` + +error: `as` casting between raw pointers without changing its mutability + --> $DIR/ptr_as_ptr.rs:144:9 + | +LL | ptr::null() as *const _ + | ^^^^^^^^^^^^^^^^^^^^^^^ help: try call directly: `ptr::null()` + +error: `as` casting between raw pointers without changing its mutability + --> $DIR/ptr_as_ptr.rs:148:9 + | +LL | core::ptr::null() as *const _ + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try call directly: `core::ptr::null()` + +error: `as` casting between raw pointers without changing its mutability + --> $DIR/ptr_as_ptr.rs:155:9 + | +LL | ptr::null_mut() as _ + | ^^^^^^^^^^^^^^^^^^^^ help: try call directly: `ptr::null_mut()` + +error: `as` casting between raw pointers without changing its mutability + --> $DIR/ptr_as_ptr.rs:159:9 + | +LL | std::ptr::null_mut() as _ + | ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try call directly: `std::ptr::null_mut()` + +error: `as` casting between raw pointers without changing its mutability + --> $DIR/ptr_as_ptr.rs:164:9 + | +LL | ptr::null_mut() as _ + | ^^^^^^^^^^^^^^^^^^^^ help: try call directly: `ptr::null_mut()` + +error: `as` casting between raw pointers without changing its mutability + --> $DIR/ptr_as_ptr.rs:168:9 + | +LL | core::ptr::null_mut() as _ + | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try call directly: `core::ptr::null_mut()` + +error: `as` casting between raw pointers without changing its mutability + --> $DIR/ptr_as_ptr.rs:173:9 + | +LL | ptr::null() as _ + | ^^^^^^^^^^^^^^^^ help: try call directly: `ptr::null()` + +error: `as` casting between raw pointers without changing its mutability + --> $DIR/ptr_as_ptr.rs:177:9 + | +LL | std::ptr::null() as _ + | ^^^^^^^^^^^^^^^^^^^^^ help: try call directly: `std::ptr::null()` + +error: `as` casting between raw pointers without changing its mutability + --> $DIR/ptr_as_ptr.rs:182:9 + | +LL | ptr::null() as _ + | ^^^^^^^^^^^^^^^^ help: try call directly: `ptr::null()` + +error: `as` casting between raw pointers without changing its mutability + --> $DIR/ptr_as_ptr.rs:186:9 + | +LL | core::ptr::null() as _ + | ^^^^^^^^^^^^^^^^^^^^^^ help: try call directly: `core::ptr::null()` + +error: aborting due to 33 previous errors diff --git a/src/tools/clippy/tests/ui/pub_use.stderr b/src/tools/clippy/tests/ui/pub_use.stderr index 781572736..f6f5db9a1 100644 --- a/src/tools/clippy/tests/ui/pub_use.stderr +++ b/src/tools/clippy/tests/ui/pub_use.stderr @@ -8,5 +8,5 @@ LL | pub use inner::Test; = note: `-D clippy::pub-use` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::pub_use)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/question_mark_used.stderr b/src/tools/clippy/tests/ui/question_mark_used.stderr index a3f440de8..b4e256ddb 100644 --- a/src/tools/clippy/tests/ui/question_mark_used.stderr +++ b/src/tools/clippy/tests/ui/question_mark_used.stderr @@ -8,5 +8,5 @@ LL | other_function()?; = note: `-D clippy::question-mark-used` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::question_mark_used)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/range.stderr b/src/tools/clippy/tests/ui/range.stderr index 9f174307b..78ef17b5b 100644 --- a/src/tools/clippy/tests/ui/range.stderr +++ b/src/tools/clippy/tests/ui/range.stderr @@ -7,5 +7,5 @@ LL | let _x = v1.iter().zip(0..v1.len()); = note: `-D clippy::range-zip-with-len` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::range_zip_with_len)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/redundant_closure_call_fixable.fixed b/src/tools/clippy/tests/ui/redundant_closure_call_fixable.fixed index bf268d0b5..f272d8359 100644 --- a/src/tools/clippy/tests/ui/redundant_closure_call_fixable.fixed +++ b/src/tools/clippy/tests/ui/redundant_closure_call_fixable.fixed @@ -84,3 +84,21 @@ fn issue9956() { bar()(42, 5); foo(42, 5); } + +async fn issue11357() { + async {}.await; +} + +mod issue11707 { + use core::future::Future; + + fn spawn_on(fut: impl Future<Output = ()>) {} + + fn demo() { + spawn_on(async move {}); + } +} + +fn avoid_double_parens() { + std::convert::identity(13_i32 + 36_i32).leading_zeros(); +} diff --git a/src/tools/clippy/tests/ui/redundant_closure_call_fixable.rs b/src/tools/clippy/tests/ui/redundant_closure_call_fixable.rs index c8a91049d..f45db8c9c 100644 --- a/src/tools/clippy/tests/ui/redundant_closure_call_fixable.rs +++ b/src/tools/clippy/tests/ui/redundant_closure_call_fixable.rs @@ -84,3 +84,21 @@ fn issue9956() { bar()((|| || 42)()(), 5); foo((|| || 42)()(), 5); } + +async fn issue11357() { + (|| async {})().await; +} + +mod issue11707 { + use core::future::Future; + + fn spawn_on(fut: impl Future<Output = ()>) {} + + fn demo() { + spawn_on((|| async move {})()); + } +} + +fn avoid_double_parens() { + std::convert::identity((|| 13_i32 + 36_i32)()).leading_zeros(); +} diff --git a/src/tools/clippy/tests/ui/redundant_closure_call_fixable.stderr b/src/tools/clippy/tests/ui/redundant_closure_call_fixable.stderr index a7cdb4369..028d383ad 100644 --- a/src/tools/clippy/tests/ui/redundant_closure_call_fixable.stderr +++ b/src/tools/clippy/tests/ui/redundant_closure_call_fixable.stderr @@ -123,5 +123,23 @@ error: try not to call a closure in the expression where it is declared LL | foo((|| || 42)()(), 5); | ^^^^^^^^^^^^^^ help: try doing something like: `42` -error: aborting due to 14 previous errors +error: try not to call a closure in the expression where it is declared + --> $DIR/redundant_closure_call_fixable.rs:89:5 + | +LL | (|| async {})().await; + | ^^^^^^^^^^^^^^^ help: try doing something like: `async {}` + +error: try not to call a closure in the expression where it is declared + --> $DIR/redundant_closure_call_fixable.rs:98:18 + | +LL | spawn_on((|| async move {})()); + | ^^^^^^^^^^^^^^^^^^^^ help: try doing something like: `async move {}` + +error: try not to call a closure in the expression where it is declared + --> $DIR/redundant_closure_call_fixable.rs:103:28 + | +LL | std::convert::identity((|| 13_i32 + 36_i32)()).leading_zeros(); + | ^^^^^^^^^^^^^^^^^^^^^^ help: try doing something like: `13_i32 + 36_i32` + +error: aborting due to 17 previous errors diff --git a/src/tools/clippy/tests/ui/redundant_guards.fixed b/src/tools/clippy/tests/ui/redundant_guards.fixed index f8af90927..aef26ef22 100644 --- a/src/tools/clippy/tests/ui/redundant_guards.fixed +++ b/src/tools/clippy/tests/ui/redundant_guards.fixed @@ -193,3 +193,60 @@ mod issue11465 { } } } + +fn issue11807() { + #![allow(clippy::single_match)] + + match Some(Some("")) { + Some(Some("")) => {}, + _ => {}, + } + + match Some(Some(String::new())) { + // Do not lint: String deref-coerces to &str + Some(Some(x)) if x.is_empty() => {}, + _ => {}, + } + + match Some(Some(&[] as &[i32])) { + Some(Some([])) => {}, + _ => {}, + } + + match Some(Some([] as [i32; 0])) { + Some(Some([])) => {}, + _ => {}, + } + + match Some(Some(Vec::<()>::new())) { + // Do not lint: Vec deref-coerces to &[T] + Some(Some(x)) if x.is_empty() => {}, + _ => {}, + } + + match Some(Some(&[] as &[i32])) { + Some(Some([..])) => {}, + _ => {}, + } + + match Some(Some(&[] as &[i32])) { + Some(Some([1, ..])) => {}, + _ => {}, + } + + match Some(Some(&[] as &[i32])) { + Some(Some([1, 2, ..])) => {}, + _ => {}, + } + + match Some(Some(&[] as &[i32])) { + Some(Some([.., 1, 2])) => {}, + _ => {}, + } + + match Some(Some(Vec::<i32>::new())) { + // Do not lint: deref coercion + Some(Some(x)) if x.starts_with(&[1, 2]) => {}, + _ => {}, + } +} diff --git a/src/tools/clippy/tests/ui/redundant_guards.rs b/src/tools/clippy/tests/ui/redundant_guards.rs index b46f8a620..5d476f5b0 100644 --- a/src/tools/clippy/tests/ui/redundant_guards.rs +++ b/src/tools/clippy/tests/ui/redundant_guards.rs @@ -193,3 +193,60 @@ mod issue11465 { } } } + +fn issue11807() { + #![allow(clippy::single_match)] + + match Some(Some("")) { + Some(Some(x)) if x.is_empty() => {}, + _ => {}, + } + + match Some(Some(String::new())) { + // Do not lint: String deref-coerces to &str + Some(Some(x)) if x.is_empty() => {}, + _ => {}, + } + + match Some(Some(&[] as &[i32])) { + Some(Some(x)) if x.is_empty() => {}, + _ => {}, + } + + match Some(Some([] as [i32; 0])) { + Some(Some(x)) if x.is_empty() => {}, + _ => {}, + } + + match Some(Some(Vec::<()>::new())) { + // Do not lint: Vec deref-coerces to &[T] + Some(Some(x)) if x.is_empty() => {}, + _ => {}, + } + + match Some(Some(&[] as &[i32])) { + Some(Some(x)) if x.starts_with(&[]) => {}, + _ => {}, + } + + match Some(Some(&[] as &[i32])) { + Some(Some(x)) if x.starts_with(&[1]) => {}, + _ => {}, + } + + match Some(Some(&[] as &[i32])) { + Some(Some(x)) if x.starts_with(&[1, 2]) => {}, + _ => {}, + } + + match Some(Some(&[] as &[i32])) { + Some(Some(x)) if x.ends_with(&[1, 2]) => {}, + _ => {}, + } + + match Some(Some(Vec::<i32>::new())) { + // Do not lint: deref coercion + Some(Some(x)) if x.starts_with(&[1, 2]) => {}, + _ => {}, + } +} diff --git a/src/tools/clippy/tests/ui/redundant_guards.stderr b/src/tools/clippy/tests/ui/redundant_guards.stderr index b8d7834e3..f78d2a814 100644 --- a/src/tools/clippy/tests/ui/redundant_guards.stderr +++ b/src/tools/clippy/tests/ui/redundant_guards.stderr @@ -203,5 +203,89 @@ LL - B { ref c, .. } if matches!(c, &1) => {}, LL + B { c: 1, .. } => {}, | -error: aborting due to 17 previous errors +error: redundant guard + --> $DIR/redundant_guards.rs:201:26 + | +LL | Some(Some(x)) if x.is_empty() => {}, + | ^^^^^^^^^^^^ + | +help: try + | +LL - Some(Some(x)) if x.is_empty() => {}, +LL + Some(Some("")) => {}, + | + +error: redundant guard + --> $DIR/redundant_guards.rs:212:26 + | +LL | Some(Some(x)) if x.is_empty() => {}, + | ^^^^^^^^^^^^ + | +help: try + | +LL - Some(Some(x)) if x.is_empty() => {}, +LL + Some(Some([])) => {}, + | + +error: redundant guard + --> $DIR/redundant_guards.rs:217:26 + | +LL | Some(Some(x)) if x.is_empty() => {}, + | ^^^^^^^^^^^^ + | +help: try + | +LL - Some(Some(x)) if x.is_empty() => {}, +LL + Some(Some([])) => {}, + | + +error: redundant guard + --> $DIR/redundant_guards.rs:228:26 + | +LL | Some(Some(x)) if x.starts_with(&[]) => {}, + | ^^^^^^^^^^^^^^^^^^ + | +help: try + | +LL - Some(Some(x)) if x.starts_with(&[]) => {}, +LL + Some(Some([..])) => {}, + | + +error: redundant guard + --> $DIR/redundant_guards.rs:233:26 + | +LL | Some(Some(x)) if x.starts_with(&[1]) => {}, + | ^^^^^^^^^^^^^^^^^^^ + | +help: try + | +LL - Some(Some(x)) if x.starts_with(&[1]) => {}, +LL + Some(Some([1, ..])) => {}, + | + +error: redundant guard + --> $DIR/redundant_guards.rs:238:26 + | +LL | Some(Some(x)) if x.starts_with(&[1, 2]) => {}, + | ^^^^^^^^^^^^^^^^^^^^^^ + | +help: try + | +LL - Some(Some(x)) if x.starts_with(&[1, 2]) => {}, +LL + Some(Some([1, 2, ..])) => {}, + | + +error: redundant guard + --> $DIR/redundant_guards.rs:243:26 + | +LL | Some(Some(x)) if x.ends_with(&[1, 2]) => {}, + | ^^^^^^^^^^^^^^^^^^^^ + | +help: try + | +LL - Some(Some(x)) if x.ends_with(&[1, 2]) => {}, +LL + Some(Some([.., 1, 2])) => {}, + | + +error: aborting due to 24 previous errors diff --git a/src/tools/clippy/tests/ui/regex.rs b/src/tools/clippy/tests/ui/regex.rs index 094d9574a..1ea0d65bf 100644 --- a/src/tools/clippy/tests/ui/regex.rs +++ b/src/tools/clippy/tests/ui/regex.rs @@ -112,6 +112,10 @@ fn trivial_regex() { // #6005: unicode classes in bytes::Regex let a_byte_of_unicode = BRegex::new(r"\p{C}"); + + // start and end word boundry, introduced in regex 0.10 + let _ = BRegex::new(r"\<word\>"); + let _ = BRegex::new(r"\b{start}word\b{end}"); } fn main() { diff --git a/src/tools/clippy/tests/ui/rename.fixed b/src/tools/clippy/tests/ui/rename.fixed index 4df9be2c2..f4ff0f0b8 100644 --- a/src/tools/clippy/tests/ui/rename.fixed +++ b/src/tools/clippy/tests/ui/rename.fixed @@ -4,7 +4,7 @@ #![allow(clippy::almost_complete_range)] #![allow(clippy::disallowed_names)] -#![allow(clippy::blocks_in_if_conditions)] +#![allow(clippy::blocks_in_conditions)] #![allow(clippy::box_collection)] #![allow(clippy::redundant_static_lifetimes)] #![allow(clippy::cognitive_complexity)] @@ -51,10 +51,12 @@ #![allow(undropped_manually_drops)] #![allow(unknown_lints)] #![allow(unused_labels)] +#![allow(ambiguous_wide_pointer_comparisons)] #![warn(clippy::almost_complete_range)] #![warn(clippy::disallowed_names)] -#![warn(clippy::blocks_in_if_conditions)] -#![warn(clippy::blocks_in_if_conditions)] +#![warn(clippy::blocks_in_conditions)] +#![warn(clippy::blocks_in_conditions)] +#![warn(clippy::blocks_in_conditions)] #![warn(clippy::box_collection)] #![warn(clippy::redundant_static_lifetimes)] #![warn(clippy::cognitive_complexity)] @@ -107,5 +109,6 @@ #![warn(undropped_manually_drops)] #![warn(unknown_lints)] #![warn(unused_labels)] +#![warn(ambiguous_wide_pointer_comparisons)] fn main() {} diff --git a/src/tools/clippy/tests/ui/rename.rs b/src/tools/clippy/tests/ui/rename.rs index 940e60068..0df1098f5 100644 --- a/src/tools/clippy/tests/ui/rename.rs +++ b/src/tools/clippy/tests/ui/rename.rs @@ -4,7 +4,7 @@ #![allow(clippy::almost_complete_range)] #![allow(clippy::disallowed_names)] -#![allow(clippy::blocks_in_if_conditions)] +#![allow(clippy::blocks_in_conditions)] #![allow(clippy::box_collection)] #![allow(clippy::redundant_static_lifetimes)] #![allow(clippy::cognitive_complexity)] @@ -51,10 +51,12 @@ #![allow(undropped_manually_drops)] #![allow(unknown_lints)] #![allow(unused_labels)] +#![allow(ambiguous_wide_pointer_comparisons)] #![warn(clippy::almost_complete_letter_range)] #![warn(clippy::blacklisted_name)] #![warn(clippy::block_in_if_condition_expr)] #![warn(clippy::block_in_if_condition_stmt)] +#![warn(clippy::blocks_in_if_conditions)] #![warn(clippy::box_vec)] #![warn(clippy::const_static_lifetime)] #![warn(clippy::cyclomatic_complexity)] @@ -107,5 +109,6 @@ #![warn(clippy::undropped_manually_drops)] #![warn(clippy::unknown_clippy_lints)] #![warn(clippy::unused_label)] +#![warn(clippy::vtable_address_comparisons)] fn main() {} diff --git a/src/tools/clippy/tests/ui/rename.stderr b/src/tools/clippy/tests/ui/rename.stderr index 30824e154..f63ad82a7 100644 --- a/src/tools/clippy/tests/ui/rename.stderr +++ b/src/tools/clippy/tests/ui/rename.stderr @@ -1,5 +1,5 @@ error: lint `clippy::almost_complete_letter_range` has been renamed to `clippy::almost_complete_range` - --> $DIR/rename.rs:54:9 + --> $DIR/rename.rs:55:9 | LL | #![warn(clippy::almost_complete_letter_range)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::almost_complete_range` @@ -8,334 +8,346 @@ LL | #![warn(clippy::almost_complete_letter_range)] = help: to override `-D warnings` add `#[allow(renamed_and_removed_lints)]` error: lint `clippy::blacklisted_name` has been renamed to `clippy::disallowed_names` - --> $DIR/rename.rs:55:9 + --> $DIR/rename.rs:56:9 | LL | #![warn(clippy::blacklisted_name)] | ^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::disallowed_names` -error: lint `clippy::block_in_if_condition_expr` has been renamed to `clippy::blocks_in_if_conditions` - --> $DIR/rename.rs:56:9 +error: lint `clippy::block_in_if_condition_expr` has been renamed to `clippy::blocks_in_conditions` + --> $DIR/rename.rs:57:9 | LL | #![warn(clippy::block_in_if_condition_expr)] - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::blocks_in_if_conditions` + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::blocks_in_conditions` -error: lint `clippy::block_in_if_condition_stmt` has been renamed to `clippy::blocks_in_if_conditions` - --> $DIR/rename.rs:57:9 +error: lint `clippy::block_in_if_condition_stmt` has been renamed to `clippy::blocks_in_conditions` + --> $DIR/rename.rs:58:9 | LL | #![warn(clippy::block_in_if_condition_stmt)] - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::blocks_in_if_conditions` + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::blocks_in_conditions` + +error: lint `clippy::blocks_in_if_conditions` has been renamed to `clippy::blocks_in_conditions` + --> $DIR/rename.rs:59:9 + | +LL | #![warn(clippy::blocks_in_if_conditions)] + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::blocks_in_conditions` error: lint `clippy::box_vec` has been renamed to `clippy::box_collection` - --> $DIR/rename.rs:58:9 + --> $DIR/rename.rs:60:9 | LL | #![warn(clippy::box_vec)] | ^^^^^^^^^^^^^^^ help: use the new name: `clippy::box_collection` error: lint `clippy::const_static_lifetime` has been renamed to `clippy::redundant_static_lifetimes` - --> $DIR/rename.rs:59:9 + --> $DIR/rename.rs:61:9 | LL | #![warn(clippy::const_static_lifetime)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::redundant_static_lifetimes` error: lint `clippy::cyclomatic_complexity` has been renamed to `clippy::cognitive_complexity` - --> $DIR/rename.rs:60:9 + --> $DIR/rename.rs:62:9 | LL | #![warn(clippy::cyclomatic_complexity)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::cognitive_complexity` error: lint `clippy::derive_hash_xor_eq` has been renamed to `clippy::derived_hash_with_manual_eq` - --> $DIR/rename.rs:61:9 + --> $DIR/rename.rs:63:9 | LL | #![warn(clippy::derive_hash_xor_eq)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::derived_hash_with_manual_eq` error: lint `clippy::disallowed_method` has been renamed to `clippy::disallowed_methods` - --> $DIR/rename.rs:62:9 + --> $DIR/rename.rs:64:9 | LL | #![warn(clippy::disallowed_method)] | ^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::disallowed_methods` error: lint `clippy::disallowed_type` has been renamed to `clippy::disallowed_types` - --> $DIR/rename.rs:63:9 + --> $DIR/rename.rs:65:9 | LL | #![warn(clippy::disallowed_type)] | ^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::disallowed_types` error: lint `clippy::eval_order_dependence` has been renamed to `clippy::mixed_read_write_in_expression` - --> $DIR/rename.rs:64:9 + --> $DIR/rename.rs:66:9 | LL | #![warn(clippy::eval_order_dependence)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::mixed_read_write_in_expression` error: lint `clippy::identity_conversion` has been renamed to `clippy::useless_conversion` - --> $DIR/rename.rs:65:9 + --> $DIR/rename.rs:67:9 | LL | #![warn(clippy::identity_conversion)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::useless_conversion` error: lint `clippy::if_let_some_result` has been renamed to `clippy::match_result_ok` - --> $DIR/rename.rs:66:9 + --> $DIR/rename.rs:68:9 | LL | #![warn(clippy::if_let_some_result)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::match_result_ok` error: lint `clippy::incorrect_clone_impl_on_copy_type` has been renamed to `clippy::non_canonical_clone_impl` - --> $DIR/rename.rs:67:9 + --> $DIR/rename.rs:69:9 | LL | #![warn(clippy::incorrect_clone_impl_on_copy_type)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::non_canonical_clone_impl` error: lint `clippy::incorrect_partial_ord_impl_on_ord_type` has been renamed to `clippy::non_canonical_partial_ord_impl` - --> $DIR/rename.rs:68:9 + --> $DIR/rename.rs:70:9 | LL | #![warn(clippy::incorrect_partial_ord_impl_on_ord_type)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::non_canonical_partial_ord_impl` error: lint `clippy::integer_arithmetic` has been renamed to `clippy::arithmetic_side_effects` - --> $DIR/rename.rs:69:9 + --> $DIR/rename.rs:71:9 | LL | #![warn(clippy::integer_arithmetic)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::arithmetic_side_effects` error: lint `clippy::logic_bug` has been renamed to `clippy::overly_complex_bool_expr` - --> $DIR/rename.rs:70:9 + --> $DIR/rename.rs:72:9 | LL | #![warn(clippy::logic_bug)] | ^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::overly_complex_bool_expr` error: lint `clippy::new_without_default_derive` has been renamed to `clippy::new_without_default` - --> $DIR/rename.rs:71:9 + --> $DIR/rename.rs:73:9 | LL | #![warn(clippy::new_without_default_derive)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::new_without_default` error: lint `clippy::option_and_then_some` has been renamed to `clippy::bind_instead_of_map` - --> $DIR/rename.rs:72:9 + --> $DIR/rename.rs:74:9 | LL | #![warn(clippy::option_and_then_some)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::bind_instead_of_map` error: lint `clippy::option_expect_used` has been renamed to `clippy::expect_used` - --> $DIR/rename.rs:73:9 + --> $DIR/rename.rs:75:9 | LL | #![warn(clippy::option_expect_used)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::expect_used` error: lint `clippy::option_map_unwrap_or` has been renamed to `clippy::map_unwrap_or` - --> $DIR/rename.rs:74:9 + --> $DIR/rename.rs:76:9 | LL | #![warn(clippy::option_map_unwrap_or)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::map_unwrap_or` error: lint `clippy::option_map_unwrap_or_else` has been renamed to `clippy::map_unwrap_or` - --> $DIR/rename.rs:75:9 + --> $DIR/rename.rs:77:9 | LL | #![warn(clippy::option_map_unwrap_or_else)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::map_unwrap_or` error: lint `clippy::option_unwrap_used` has been renamed to `clippy::unwrap_used` - --> $DIR/rename.rs:76:9 + --> $DIR/rename.rs:78:9 | LL | #![warn(clippy::option_unwrap_used)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::unwrap_used` error: lint `clippy::ref_in_deref` has been renamed to `clippy::needless_borrow` - --> $DIR/rename.rs:77:9 + --> $DIR/rename.rs:79:9 | LL | #![warn(clippy::ref_in_deref)] | ^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::needless_borrow` error: lint `clippy::result_expect_used` has been renamed to `clippy::expect_used` - --> $DIR/rename.rs:78:9 + --> $DIR/rename.rs:80:9 | LL | #![warn(clippy::result_expect_used)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::expect_used` error: lint `clippy::result_map_unwrap_or_else` has been renamed to `clippy::map_unwrap_or` - --> $DIR/rename.rs:79:9 + --> $DIR/rename.rs:81:9 | LL | #![warn(clippy::result_map_unwrap_or_else)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::map_unwrap_or` error: lint `clippy::result_unwrap_used` has been renamed to `clippy::unwrap_used` - --> $DIR/rename.rs:80:9 + --> $DIR/rename.rs:82:9 | LL | #![warn(clippy::result_unwrap_used)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::unwrap_used` error: lint `clippy::single_char_push_str` has been renamed to `clippy::single_char_add_str` - --> $DIR/rename.rs:81:9 + --> $DIR/rename.rs:83:9 | LL | #![warn(clippy::single_char_push_str)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::single_char_add_str` error: lint `clippy::stutter` has been renamed to `clippy::module_name_repetitions` - --> $DIR/rename.rs:82:9 + --> $DIR/rename.rs:84:9 | LL | #![warn(clippy::stutter)] | ^^^^^^^^^^^^^^^ help: use the new name: `clippy::module_name_repetitions` error: lint `clippy::to_string_in_display` has been renamed to `clippy::recursive_format_impl` - --> $DIR/rename.rs:83:9 + --> $DIR/rename.rs:85:9 | LL | #![warn(clippy::to_string_in_display)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::recursive_format_impl` error: lint `clippy::unwrap_or_else_default` has been renamed to `clippy::unwrap_or_default` - --> $DIR/rename.rs:84:9 + --> $DIR/rename.rs:86:9 | LL | #![warn(clippy::unwrap_or_else_default)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::unwrap_or_default` error: lint `clippy::zero_width_space` has been renamed to `clippy::invisible_characters` - --> $DIR/rename.rs:85:9 + --> $DIR/rename.rs:87:9 | LL | #![warn(clippy::zero_width_space)] | ^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::invisible_characters` error: lint `clippy::cast_ref_to_mut` has been renamed to `invalid_reference_casting` - --> $DIR/rename.rs:86:9 + --> $DIR/rename.rs:88:9 | LL | #![warn(clippy::cast_ref_to_mut)] | ^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `invalid_reference_casting` error: lint `clippy::clone_double_ref` has been renamed to `suspicious_double_ref_op` - --> $DIR/rename.rs:87:9 + --> $DIR/rename.rs:89:9 | LL | #![warn(clippy::clone_double_ref)] | ^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `suspicious_double_ref_op` error: lint `clippy::cmp_nan` has been renamed to `invalid_nan_comparisons` - --> $DIR/rename.rs:88:9 + --> $DIR/rename.rs:90:9 | LL | #![warn(clippy::cmp_nan)] | ^^^^^^^^^^^^^^^ help: use the new name: `invalid_nan_comparisons` error: lint `clippy::drop_bounds` has been renamed to `drop_bounds` - --> $DIR/rename.rs:89:9 + --> $DIR/rename.rs:91:9 | LL | #![warn(clippy::drop_bounds)] | ^^^^^^^^^^^^^^^^^^^ help: use the new name: `drop_bounds` error: lint `clippy::drop_copy` has been renamed to `dropping_copy_types` - --> $DIR/rename.rs:90:9 + --> $DIR/rename.rs:92:9 | LL | #![warn(clippy::drop_copy)] | ^^^^^^^^^^^^^^^^^ help: use the new name: `dropping_copy_types` error: lint `clippy::drop_ref` has been renamed to `dropping_references` - --> $DIR/rename.rs:91:9 + --> $DIR/rename.rs:93:9 | LL | #![warn(clippy::drop_ref)] | ^^^^^^^^^^^^^^^^ help: use the new name: `dropping_references` error: lint `clippy::fn_null_check` has been renamed to `useless_ptr_null_checks` - --> $DIR/rename.rs:92:9 + --> $DIR/rename.rs:94:9 | LL | #![warn(clippy::fn_null_check)] | ^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `useless_ptr_null_checks` error: lint `clippy::for_loop_over_option` has been renamed to `for_loops_over_fallibles` - --> $DIR/rename.rs:93:9 + --> $DIR/rename.rs:95:9 | LL | #![warn(clippy::for_loop_over_option)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `for_loops_over_fallibles` error: lint `clippy::for_loop_over_result` has been renamed to `for_loops_over_fallibles` - --> $DIR/rename.rs:94:9 + --> $DIR/rename.rs:96:9 | LL | #![warn(clippy::for_loop_over_result)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `for_loops_over_fallibles` error: lint `clippy::for_loops_over_fallibles` has been renamed to `for_loops_over_fallibles` - --> $DIR/rename.rs:95:9 + --> $DIR/rename.rs:97:9 | LL | #![warn(clippy::for_loops_over_fallibles)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `for_loops_over_fallibles` error: lint `clippy::forget_copy` has been renamed to `forgetting_copy_types` - --> $DIR/rename.rs:96:9 + --> $DIR/rename.rs:98:9 | LL | #![warn(clippy::forget_copy)] | ^^^^^^^^^^^^^^^^^^^ help: use the new name: `forgetting_copy_types` error: lint `clippy::forget_ref` has been renamed to `forgetting_references` - --> $DIR/rename.rs:97:9 + --> $DIR/rename.rs:99:9 | LL | #![warn(clippy::forget_ref)] | ^^^^^^^^^^^^^^^^^^ help: use the new name: `forgetting_references` error: lint `clippy::into_iter_on_array` has been renamed to `array_into_iter` - --> $DIR/rename.rs:98:9 + --> $DIR/rename.rs:100:9 | LL | #![warn(clippy::into_iter_on_array)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `array_into_iter` error: lint `clippy::invalid_atomic_ordering` has been renamed to `invalid_atomic_ordering` - --> $DIR/rename.rs:99:9 + --> $DIR/rename.rs:101:9 | LL | #![warn(clippy::invalid_atomic_ordering)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `invalid_atomic_ordering` error: lint `clippy::invalid_ref` has been renamed to `invalid_value` - --> $DIR/rename.rs:100:9 + --> $DIR/rename.rs:102:9 | LL | #![warn(clippy::invalid_ref)] | ^^^^^^^^^^^^^^^^^^^ help: use the new name: `invalid_value` error: lint `clippy::invalid_utf8_in_unchecked` has been renamed to `invalid_from_utf8_unchecked` - --> $DIR/rename.rs:101:9 + --> $DIR/rename.rs:103:9 | LL | #![warn(clippy::invalid_utf8_in_unchecked)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `invalid_from_utf8_unchecked` error: lint `clippy::let_underscore_drop` has been renamed to `let_underscore_drop` - --> $DIR/rename.rs:102:9 + --> $DIR/rename.rs:104:9 | LL | #![warn(clippy::let_underscore_drop)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `let_underscore_drop` error: lint `clippy::mem_discriminant_non_enum` has been renamed to `enum_intrinsics_non_enums` - --> $DIR/rename.rs:103:9 + --> $DIR/rename.rs:105:9 | LL | #![warn(clippy::mem_discriminant_non_enum)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `enum_intrinsics_non_enums` error: lint `clippy::panic_params` has been renamed to `non_fmt_panics` - --> $DIR/rename.rs:104:9 + --> $DIR/rename.rs:106:9 | LL | #![warn(clippy::panic_params)] | ^^^^^^^^^^^^^^^^^^^^ help: use the new name: `non_fmt_panics` error: lint `clippy::positional_named_format_parameters` has been renamed to `named_arguments_used_positionally` - --> $DIR/rename.rs:105:9 + --> $DIR/rename.rs:107:9 | LL | #![warn(clippy::positional_named_format_parameters)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `named_arguments_used_positionally` error: lint `clippy::temporary_cstring_as_ptr` has been renamed to `temporary_cstring_as_ptr` - --> $DIR/rename.rs:106:9 + --> $DIR/rename.rs:108:9 | LL | #![warn(clippy::temporary_cstring_as_ptr)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `temporary_cstring_as_ptr` error: lint `clippy::undropped_manually_drops` has been renamed to `undropped_manually_drops` - --> $DIR/rename.rs:107:9 + --> $DIR/rename.rs:109:9 | LL | #![warn(clippy::undropped_manually_drops)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `undropped_manually_drops` error: lint `clippy::unknown_clippy_lints` has been renamed to `unknown_lints` - --> $DIR/rename.rs:108:9 + --> $DIR/rename.rs:110:9 | LL | #![warn(clippy::unknown_clippy_lints)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `unknown_lints` error: lint `clippy::unused_label` has been renamed to `unused_labels` - --> $DIR/rename.rs:109:9 + --> $DIR/rename.rs:111:9 | LL | #![warn(clippy::unused_label)] | ^^^^^^^^^^^^^^^^^^^^ help: use the new name: `unused_labels` -error: aborting due to 56 previous errors +error: lint `clippy::vtable_address_comparisons` has been renamed to `ambiguous_wide_pointer_comparisons` + --> $DIR/rename.rs:112:9 + | +LL | #![warn(clippy::vtable_address_comparisons)] + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `ambiguous_wide_pointer_comparisons` + +error: aborting due to 58 previous errors diff --git a/src/tools/clippy/tests/ui/renamed_builtin_attr.stderr b/src/tools/clippy/tests/ui/renamed_builtin_attr.stderr index 636d88fcd..662188bba 100644 --- a/src/tools/clippy/tests/ui/renamed_builtin_attr.stderr +++ b/src/tools/clippy/tests/ui/renamed_builtin_attr.stderr @@ -4,5 +4,5 @@ error: usage of deprecated attribute LL | #[clippy::cyclomatic_complexity = "1"] | ^^^^^^^^^^^^^^^^^^^^^ help: consider using: `cognitive_complexity` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/repeat_vec_with_capacity.fixed b/src/tools/clippy/tests/ui/repeat_vec_with_capacity.fixed new file mode 100644 index 000000000..2afe2f433 --- /dev/null +++ b/src/tools/clippy/tests/ui/repeat_vec_with_capacity.fixed @@ -0,0 +1,38 @@ +#![warn(clippy::repeat_vec_with_capacity)] + +fn main() { + { + (0..123).map(|_| Vec::<()>::with_capacity(42)).collect::<Vec<_>>(); + //~^ ERROR: repeating `Vec::with_capacity` using `vec![x; n]`, which does not retain capacity + } + + { + let n = 123; + (0..n).map(|_| Vec::<()>::with_capacity(42)).collect::<Vec<_>>(); + //~^ ERROR: repeating `Vec::with_capacity` using `vec![x; n]`, which does not retain capacity + } + + { + macro_rules! from_macro { + ($x:expr) => { + vec![$x; 123]; + }; + } + // vec expansion is from another macro, don't lint + from_macro!(Vec::<()>::with_capacity(42)); + } + + { + std::iter::repeat_with(|| Vec::<()>::with_capacity(42)); + //~^ ERROR: repeating `Vec::with_capacity` using `iter::repeat`, which does not retain capacity + } + + { + macro_rules! from_macro { + ($x:expr) => { + std::iter::repeat($x) + }; + } + from_macro!(Vec::<()>::with_capacity(42)); + } +} diff --git a/src/tools/clippy/tests/ui/repeat_vec_with_capacity.rs b/src/tools/clippy/tests/ui/repeat_vec_with_capacity.rs new file mode 100644 index 000000000..659f2a395 --- /dev/null +++ b/src/tools/clippy/tests/ui/repeat_vec_with_capacity.rs @@ -0,0 +1,38 @@ +#![warn(clippy::repeat_vec_with_capacity)] + +fn main() { + { + vec![Vec::<()>::with_capacity(42); 123]; + //~^ ERROR: repeating `Vec::with_capacity` using `vec![x; n]`, which does not retain capacity + } + + { + let n = 123; + vec![Vec::<()>::with_capacity(42); n]; + //~^ ERROR: repeating `Vec::with_capacity` using `vec![x; n]`, which does not retain capacity + } + + { + macro_rules! from_macro { + ($x:expr) => { + vec![$x; 123]; + }; + } + // vec expansion is from another macro, don't lint + from_macro!(Vec::<()>::with_capacity(42)); + } + + { + std::iter::repeat(Vec::<()>::with_capacity(42)); + //~^ ERROR: repeating `Vec::with_capacity` using `iter::repeat`, which does not retain capacity + } + + { + macro_rules! from_macro { + ($x:expr) => { + std::iter::repeat($x) + }; + } + from_macro!(Vec::<()>::with_capacity(42)); + } +} diff --git a/src/tools/clippy/tests/ui/repeat_vec_with_capacity.stderr b/src/tools/clippy/tests/ui/repeat_vec_with_capacity.stderr new file mode 100644 index 000000000..10b5f1214 --- /dev/null +++ b/src/tools/clippy/tests/ui/repeat_vec_with_capacity.stderr @@ -0,0 +1,40 @@ +error: repeating `Vec::with_capacity` using `vec![x; n]`, which does not retain capacity + --> $DIR/repeat_vec_with_capacity.rs:5:9 + | +LL | vec![Vec::<()>::with_capacity(42); 123]; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: only the last `Vec` will have the capacity + = note: `-D clippy::repeat-vec-with-capacity` implied by `-D warnings` + = help: to override `-D warnings` add `#[allow(clippy::repeat_vec_with_capacity)]` +help: if you intended to initialize multiple `Vec`s with an initial capacity, try + | +LL | (0..123).map(|_| Vec::<()>::with_capacity(42)).collect::<Vec<_>>(); + | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +error: repeating `Vec::with_capacity` using `vec![x; n]`, which does not retain capacity + --> $DIR/repeat_vec_with_capacity.rs:11:9 + | +LL | vec![Vec::<()>::with_capacity(42); n]; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: only the last `Vec` will have the capacity +help: if you intended to initialize multiple `Vec`s with an initial capacity, try + | +LL | (0..n).map(|_| Vec::<()>::with_capacity(42)).collect::<Vec<_>>(); + | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +error: repeating `Vec::with_capacity` using `iter::repeat`, which does not retain capacity + --> $DIR/repeat_vec_with_capacity.rs:26:9 + | +LL | std::iter::repeat(Vec::<()>::with_capacity(42)); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: none of the yielded `Vec`s will have the requested capacity +help: if you intended to create an iterator that yields `Vec`s with an initial capacity, try + | +LL | std::iter::repeat_with(|| Vec::<()>::with_capacity(42)); + | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +error: aborting due to 3 previous errors + diff --git a/src/tools/clippy/tests/ui/result_map_or_into_option.fixed b/src/tools/clippy/tests/ui/result_map_or_into_option.fixed index fb2db6cf5..cf42b24b2 100644 --- a/src/tools/clippy/tests/ui/result_map_or_into_option.fixed +++ b/src/tools/clippy/tests/ui/result_map_or_into_option.fixed @@ -3,6 +3,12 @@ fn main() { let opt: Result<u32, &str> = Ok(1); let _ = opt.ok(); + //~^ ERROR: called `map_or(None, Some)` on a `Result` value + let _ = opt.ok(); + //~^ ERROR: called `map_or_else(|_| None, Some)` on a `Result` value + #[rustfmt::skip] + let _ = opt.ok(); + //~^ ERROR: called `map_or_else(|_| None, Some)` on a `Result` value let rewrap = |s: u32| -> Option<u32> { Some(s) }; @@ -14,4 +20,5 @@ fn main() { // return should not emit the lint let opt: Result<u32, &str> = Ok(1); _ = opt.map_or(None, |_x| Some(1)); + let _ = opt.map_or_else(|a| a.parse::<u32>().ok(), Some); } diff --git a/src/tools/clippy/tests/ui/result_map_or_into_option.rs b/src/tools/clippy/tests/ui/result_map_or_into_option.rs index 06779a699..cdb45d6b8 100644 --- a/src/tools/clippy/tests/ui/result_map_or_into_option.rs +++ b/src/tools/clippy/tests/ui/result_map_or_into_option.rs @@ -3,6 +3,12 @@ fn main() { let opt: Result<u32, &str> = Ok(1); let _ = opt.map_or(None, Some); + //~^ ERROR: called `map_or(None, Some)` on a `Result` value + let _ = opt.map_or_else(|_| None, Some); + //~^ ERROR: called `map_or_else(|_| None, Some)` on a `Result` value + #[rustfmt::skip] + let _ = opt.map_or_else(|_| { None }, Some); + //~^ ERROR: called `map_or_else(|_| None, Some)` on a `Result` value let rewrap = |s: u32| -> Option<u32> { Some(s) }; @@ -14,4 +20,5 @@ fn main() { // return should not emit the lint let opt: Result<u32, &str> = Ok(1); _ = opt.map_or(None, |_x| Some(1)); + let _ = opt.map_or_else(|a| a.parse::<u32>().ok(), Some); } diff --git a/src/tools/clippy/tests/ui/result_map_or_into_option.stderr b/src/tools/clippy/tests/ui/result_map_or_into_option.stderr index 9396ea4c0..3d6bfef48 100644 --- a/src/tools/clippy/tests/ui/result_map_or_into_option.stderr +++ b/src/tools/clippy/tests/ui/result_map_or_into_option.stderr @@ -1,4 +1,4 @@ -error: called `map_or(None, Some)` on a `Result` value. This can be done more directly by calling `ok()` instead +error: called `map_or(None, Some)` on a `Result` value --> $DIR/result_map_or_into_option.rs:5:13 | LL | let _ = opt.map_or(None, Some); @@ -7,5 +7,17 @@ LL | let _ = opt.map_or(None, Some); = note: `-D clippy::result-map-or-into-option` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::result_map_or_into_option)]` -error: aborting due to previous error +error: called `map_or_else(|_| None, Some)` on a `Result` value + --> $DIR/result_map_or_into_option.rs:7:13 + | +LL | let _ = opt.map_or_else(|_| None, Some); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try using `ok` instead: `opt.ok()` + +error: called `map_or_else(|_| None, Some)` on a `Result` value + --> $DIR/result_map_or_into_option.rs:10:13 + | +LL | let _ = opt.map_or_else(|_| { None }, Some); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try using `ok` instead: `opt.ok()` + +error: aborting due to 3 previous errors diff --git a/src/tools/clippy/tests/ui/seek_from_current.stderr b/src/tools/clippy/tests/ui/seek_from_current.stderr index 42eb342c1..4858cb82e 100644 --- a/src/tools/clippy/tests/ui/seek_from_current.stderr +++ b/src/tools/clippy/tests/ui/seek_from_current.stderr @@ -7,5 +7,5 @@ LL | f.seek(SeekFrom::Current(0))?; = note: `-D clippy::seek-from-current` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::seek_from_current)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/self_named_constructors.stderr b/src/tools/clippy/tests/ui/self_named_constructors.stderr index f299b860d..8083ff965 100644 --- a/src/tools/clippy/tests/ui/self_named_constructors.stderr +++ b/src/tools/clippy/tests/ui/self_named_constructors.stderr @@ -11,5 +11,5 @@ LL | | } = note: `-D clippy::self-named-constructors` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::self_named_constructors)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/serde.stderr b/src/tools/clippy/tests/ui/serde.stderr index e5d64e271..079ba42bd 100644 --- a/src/tools/clippy/tests/ui/serde.stderr +++ b/src/tools/clippy/tests/ui/serde.stderr @@ -13,5 +13,5 @@ LL | | } = note: `-D clippy::serde-api-misuse` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::serde_api_misuse)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/should_panic_without_expect.stderr b/src/tools/clippy/tests/ui/should_panic_without_expect.stderr index dfcef52a9..b13db83bd 100644 --- a/src/tools/clippy/tests/ui/should_panic_without_expect.stderr +++ b/src/tools/clippy/tests/ui/should_panic_without_expect.stderr @@ -10,5 +10,5 @@ note: the lint level is defined here LL | #![deny(clippy::should_panic_without_expect)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/single_element_loop.fixed b/src/tools/clippy/tests/ui/single_element_loop.fixed index a82eb6afc..4e59c7631 100644 --- a/src/tools/clippy/tests/ui/single_element_loop.fixed +++ b/src/tools/clippy/tests/ui/single_element_loop.fixed @@ -15,23 +15,19 @@ fn main() { dbg!(item); } - { - let item = &(0..5); + for item in 0..5 { dbg!(item); } - { - let item = &mut (0..5); + for item in 0..5 { dbg!(item); } - { - let item = 0..5; + for item in 0..5 { dbg!(item); } - { - let item = 0..5; + for item in 0..5 { dbg!(item); } diff --git a/src/tools/clippy/tests/ui/single_element_loop.stderr b/src/tools/clippy/tests/ui/single_element_loop.stderr index 603dd7406..952d70414 100644 --- a/src/tools/clippy/tests/ui/single_element_loop.stderr +++ b/src/tools/clippy/tests/ui/single_element_loop.stderr @@ -32,69 +32,29 @@ LL + dbg!(item); LL + } | -error: for loop over a single element - --> $DIR/single_element_loop.rs:16:5 - | -LL | / for item in &[0..5] { -LL | | dbg!(item); -LL | | } - | |_____^ - | -help: try - | -LL ~ { -LL + let item = &(0..5); -LL + dbg!(item); -LL + } +error: this loops only once with `item` being `0..5` + --> $DIR/single_element_loop.rs:16:17 | +LL | for item in &[0..5] { + | ^^^^^^^ help: did you mean to iterate over the range instead?: `0..5` -error: for loop over a single element - --> $DIR/single_element_loop.rs:20:5 - | -LL | / for item in [0..5].iter_mut() { -LL | | dbg!(item); -LL | | } - | |_____^ - | -help: try - | -LL ~ { -LL + let item = &mut (0..5); -LL + dbg!(item); -LL + } +error: this loops only once with `item` being `0..5` + --> $DIR/single_element_loop.rs:20:17 | +LL | for item in [0..5].iter_mut() { + | ^^^^^^^^^^^^^^^^^ help: did you mean to iterate over the range instead?: `0..5` -error: for loop over a single element - --> $DIR/single_element_loop.rs:24:5 - | -LL | / for item in [0..5] { -LL | | dbg!(item); -LL | | } - | |_____^ - | -help: try - | -LL ~ { -LL + let item = 0..5; -LL + dbg!(item); -LL + } +error: this loops only once with `item` being `0..5` + --> $DIR/single_element_loop.rs:24:17 | +LL | for item in [0..5] { + | ^^^^^^ help: did you mean to iterate over the range instead?: `0..5` -error: for loop over a single element - --> $DIR/single_element_loop.rs:28:5 - | -LL | / for item in [0..5].into_iter() { -LL | | dbg!(item); -LL | | } - | |_____^ - | -help: try - | -LL ~ { -LL + let item = 0..5; -LL + dbg!(item); -LL + } +error: this loops only once with `item` being `0..5` + --> $DIR/single_element_loop.rs:28:17 | +LL | for item in [0..5].into_iter() { + | ^^^^^^^^^^^^^^^^^^ help: did you mean to iterate over the range instead?: `0..5` error: for loop over a single element --> $DIR/single_element_loop.rs:47:5 diff --git a/src/tools/clippy/tests/ui/string_from_utf8_as_bytes.stderr b/src/tools/clippy/tests/ui/string_from_utf8_as_bytes.stderr index cf5688a97..4738bef3a 100644 --- a/src/tools/clippy/tests/ui/string_from_utf8_as_bytes.stderr +++ b/src/tools/clippy/tests/ui/string_from_utf8_as_bytes.stderr @@ -7,5 +7,5 @@ LL | let _ = std::str::from_utf8(&"Hello World!".as_bytes()[6..11]); = note: `-D clippy::string-from-utf8-as-bytes` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::string_from_utf8_as_bytes)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/string_to_string.stderr b/src/tools/clippy/tests/ui/string_to_string.stderr index 27a844315..f1f8e176b 100644 --- a/src/tools/clippy/tests/ui/string_to_string.stderr +++ b/src/tools/clippy/tests/ui/string_to_string.stderr @@ -8,5 +8,5 @@ LL | let mut v = message.to_string(); = note: `-D clippy::string-to-string` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::string_to_string)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/test_attr_in_doctest.rs b/src/tools/clippy/tests/ui/test_attr_in_doctest.rs new file mode 100644 index 000000000..4c904f7a0 --- /dev/null +++ b/src/tools/clippy/tests/ui/test_attr_in_doctest.rs @@ -0,0 +1,51 @@ +/// This is a test for `#[test]` in doctests +/// +/// # Examples +/// +/// ``` +/// #[test] +/// fn should_be_linted() { +/// assert_eq!(1, 1); +/// } +/// ``` +/// +/// Make sure we catch multiple tests in one example, +/// and show that we really parse the attr: +/// +/// ``` +/// #[test] +/// fn should_also_be_linted() { +/// #[cfg(test)] +/// assert!(true); +/// } +/// +/// #[test] +/// fn should_be_linted_too() { +/// assert_eq!("#[test]", " +/// #[test] +/// "); +/// } +/// ``` +/// +/// We don't catch examples that aren't run: +/// +/// ```ignore +/// #[test] +/// fn ignored() { todo!() } +/// ``` +/// +/// ```no_run +/// #[test] +/// fn ignored() { todo!() } +/// ``` +/// +/// ```compile_fail +/// #[test] +/// fn ignored() { Err(()) } +/// ``` +/// +/// ```txt +/// #[test] +/// fn not_even_rust() { panic!("Ouch") } +/// ``` +fn test_attr_in_doctests() {} diff --git a/src/tools/clippy/tests/ui/test_attr_in_doctest.stderr b/src/tools/clippy/tests/ui/test_attr_in_doctest.stderr new file mode 100644 index 000000000..605259f3b --- /dev/null +++ b/src/tools/clippy/tests/ui/test_attr_in_doctest.stderr @@ -0,0 +1,29 @@ +error: unit tests in doctest are not executed + --> $DIR/test_attr_in_doctest.rs:6:5 + | +LL | /// #[test] + | _____^ +LL | | /// fn should_be_linted() { + | |_______________________^ + | + = note: `-D clippy::test-attr-in-doctest` implied by `-D warnings` + = help: to override `-D warnings` add `#[allow(clippy::test_attr_in_doctest)]` + +error: unit tests in doctest are not executed + --> $DIR/test_attr_in_doctest.rs:16:5 + | +LL | /// #[test] + | _____^ +LL | | /// fn should_also_be_linted() { + | |____________________________^ + +error: unit tests in doctest are not executed + --> $DIR/test_attr_in_doctest.rs:22:5 + | +LL | /// #[test] + | _____^ +LL | | /// fn should_be_linted_too() { + | |___________________________^ + +error: aborting due to 3 previous errors + diff --git a/src/tools/clippy/tests/ui/tests_outside_test_module.stderr b/src/tools/clippy/tests/ui/tests_outside_test_module.stderr index 112d6ce1f..ec0cdea83 100644 --- a/src/tools/clippy/tests/ui/tests_outside_test_module.stderr +++ b/src/tools/clippy/tests/ui/tests_outside_test_module.stderr @@ -8,5 +8,5 @@ LL | fn my_test() {} = note: `-D clippy::tests-outside-test-module` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::tests_outside_test_module)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/track-diagnostics.stderr b/src/tools/clippy/tests/ui/track-diagnostics.stderr index 39418d359..131adfd58 100644 --- a/src/tools/clippy/tests/ui/track-diagnostics.stderr +++ b/src/tools/clippy/tests/ui/track-diagnostics.stderr @@ -5,6 +5,6 @@ LL | const S: A = B; | ^ expected `A`, found `B` -Ztrack-diagnostics: created at compiler/rustc_infer/src/infer/error_reporting/mod.rs:LL:CC -error: aborting due to previous error +error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0308`. diff --git a/src/tools/clippy/tests/ui/transmute_ptr_to_ptr.fixed b/src/tools/clippy/tests/ui/transmute_ptr_to_ptr.fixed index 19abced98..4e145693c 100644 --- a/src/tools/clippy/tests/ui/transmute_ptr_to_ptr.fixed +++ b/src/tools/clippy/tests/ui/transmute_ptr_to_ptr.fixed @@ -43,6 +43,9 @@ fn transmute_ptr_to_ptr() { //~^ ERROR: transmute from a reference to a reference let _: &GenericParam<f32> = &*(&GenericParam { t: 1u32 } as *const GenericParam<u32> as *const GenericParam<f32>); //~^ ERROR: transmute from a reference to a reference + let u8_ref: &u8 = &0u8; + let u64_ref: &u64 = unsafe { &*(u8_ref as *const u8 as *const u64) }; + //~^ ERROR: transmute from a reference to a reference } // these are recommendations for solving the above; if these lint we need to update diff --git a/src/tools/clippy/tests/ui/transmute_ptr_to_ptr.rs b/src/tools/clippy/tests/ui/transmute_ptr_to_ptr.rs index abba2b8e5..086aadc36 100644 --- a/src/tools/clippy/tests/ui/transmute_ptr_to_ptr.rs +++ b/src/tools/clippy/tests/ui/transmute_ptr_to_ptr.rs @@ -43,6 +43,9 @@ fn transmute_ptr_to_ptr() { //~^ ERROR: transmute from a reference to a reference let _: &GenericParam<f32> = std::mem::transmute(&GenericParam { t: 1u32 }); //~^ ERROR: transmute from a reference to a reference + let u8_ref: &u8 = &0u8; + let u64_ref: &u64 = unsafe { std::mem::transmute(u8_ref) }; + //~^ ERROR: transmute from a reference to a reference } // these are recommendations for solving the above; if these lint we need to update diff --git a/src/tools/clippy/tests/ui/transmute_ptr_to_ptr.stderr b/src/tools/clippy/tests/ui/transmute_ptr_to_ptr.stderr index 564339c06..9f8599921 100644 --- a/src/tools/clippy/tests/ui/transmute_ptr_to_ptr.stderr +++ b/src/tools/clippy/tests/ui/transmute_ptr_to_ptr.stderr @@ -37,5 +37,11 @@ error: transmute from a reference to a reference LL | let _: &GenericParam<f32> = std::mem::transmute(&GenericParam { t: 1u32 }); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(&GenericParam { t: 1u32 } as *const GenericParam<u32> as *const GenericParam<f32>)` -error: aborting due to 6 previous errors +error: transmute from a reference to a reference + --> $DIR/transmute_ptr_to_ptr.rs:47:38 + | +LL | let u64_ref: &u64 = unsafe { std::mem::transmute(u8_ref) }; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(u8_ref as *const u8 as *const u64)` + +error: aborting due to 7 previous errors diff --git a/src/tools/clippy/tests/ui/transmute_ref_to_ref.rs b/src/tools/clippy/tests/ui/transmute_ref_to_ref.rs new file mode 100644 index 000000000..e7f35c574 --- /dev/null +++ b/src/tools/clippy/tests/ui/transmute_ref_to_ref.rs @@ -0,0 +1,18 @@ +//@no-rustfix + +#![deny(clippy::transmute_ptr_to_ptr)] +#![allow(dead_code)] + +fn main() { + unsafe { + let single_u64: &[u64] = &[0xDEAD_BEEF_DEAD_BEEF]; + let bools: &[bool] = unsafe { std::mem::transmute(single_u64) }; + //~^ ERROR: transmute from a reference to a reference + let a: &[u32] = &[0x12345678, 0x90ABCDEF, 0xFEDCBA09, 0x87654321]; + let b: &[u8] = unsafe { std::mem::transmute(a) }; + //~^ ERROR: transmute from a reference to a reference + let bytes = &[1u8, 2u8, 3u8, 4u8] as &[u8]; + let alt_slice: &[u32] = unsafe { core::mem::transmute(bytes) }; + //~^ ERROR: transmute from a reference to a reference + } +} diff --git a/src/tools/clippy/tests/ui/transmute_ref_to_ref.stderr b/src/tools/clippy/tests/ui/transmute_ref_to_ref.stderr new file mode 100644 index 000000000..cc6b156b1 --- /dev/null +++ b/src/tools/clippy/tests/ui/transmute_ref_to_ref.stderr @@ -0,0 +1,26 @@ +error: transmute from a reference to a reference + --> $DIR/transmute_ref_to_ref.rs:9:39 + | +LL | let bools: &[bool] = unsafe { std::mem::transmute(single_u64) }; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(single_u64 as *const [u64] as *const [bool])` + | +note: the lint level is defined here + --> $DIR/transmute_ref_to_ref.rs:3:9 + | +LL | #![deny(clippy::transmute_ptr_to_ptr)] + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +error: transmute from a reference to a reference + --> $DIR/transmute_ref_to_ref.rs:12:33 + | +LL | let b: &[u8] = unsafe { std::mem::transmute(a) }; + | ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(a as *const [u32] as *const [u8])` + +error: transmute from a reference to a reference + --> $DIR/transmute_ref_to_ref.rs:15:42 + | +LL | let alt_slice: &[u32] = unsafe { core::mem::transmute(bytes) }; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(bytes as *const [u8] as *const [u32])` + +error: aborting due to 3 previous errors + diff --git a/src/tools/clippy/tests/ui/types.stderr b/src/tools/clippy/tests/ui/types.stderr index b253cf338..f7473e1c5 100644 --- a/src/tools/clippy/tests/ui/types.stderr +++ b/src/tools/clippy/tests/ui/types.stderr @@ -7,5 +7,5 @@ LL | let c_i64: i64 = c as i64; = note: `-D clippy::cast-lossless` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::cast_lossless)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/uninhabited_references.rs b/src/tools/clippy/tests/ui/uninhabited_references.rs new file mode 100644 index 000000000..cd07b590a --- /dev/null +++ b/src/tools/clippy/tests/ui/uninhabited_references.rs @@ -0,0 +1,22 @@ +#![warn(clippy::uninhabited_references)] +#![feature(never_type)] + +fn ret_uninh_ref() -> &'static std::convert::Infallible { + unsafe { std::mem::transmute(&()) } +} + +macro_rules! ret_something { + ($name:ident, $ty:ty) => { + fn $name(x: &$ty) -> &$ty { + &*x + } + }; +} + +ret_something!(id_u32, u32); +ret_something!(id_never, !); + +fn main() { + let x = ret_uninh_ref(); + let _ = *x; +} diff --git a/src/tools/clippy/tests/ui/uninhabited_references.stderr b/src/tools/clippy/tests/ui/uninhabited_references.stderr new file mode 100644 index 000000000..2cdf320b8 --- /dev/null +++ b/src/tools/clippy/tests/ui/uninhabited_references.stderr @@ -0,0 +1,39 @@ +error: dereferencing a reference to an uninhabited type would be undefined behavior + --> $DIR/uninhabited_references.rs:4:23 + | +LL | fn ret_uninh_ref() -> &'static std::convert::Infallible { + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: `-D clippy::uninhabited-references` implied by `-D warnings` + = help: to override `-D warnings` add `#[allow(clippy::uninhabited_references)]` + +error: dereferencing a reference to an uninhabited type would be undefined behavior + --> $DIR/uninhabited_references.rs:10:30 + | +LL | fn $name(x: &$ty) -> &$ty { + | ^^^^ +... +LL | ret_something!(id_never, !); + | --------------------------- in this macro invocation + | + = note: this error originates in the macro `ret_something` (in Nightly builds, run with -Z macro-backtrace for more info) + +error: dereferencing a reference to an uninhabited type is undefined behavior + --> $DIR/uninhabited_references.rs:11:14 + | +LL | &*x + | ^^ +... +LL | ret_something!(id_never, !); + | --------------------------- in this macro invocation + | + = note: this error originates in the macro `ret_something` (in Nightly builds, run with -Z macro-backtrace for more info) + +error: dereferencing a reference to an uninhabited type is undefined behavior + --> $DIR/uninhabited_references.rs:21:13 + | +LL | let _ = *x; + | ^^ + +error: aborting due to 4 previous errors + diff --git a/src/tools/clippy/tests/ui/uninlined_format_args_panic.edition2018.stderr b/src/tools/clippy/tests/ui/uninlined_format_args_panic.edition2018.stderr index 221efeb50..736a68ab1 100644 --- a/src/tools/clippy/tests/ui/uninlined_format_args_panic.edition2018.stderr +++ b/src/tools/clippy/tests/ui/uninlined_format_args_panic.edition2018.stderr @@ -12,5 +12,5 @@ LL - println!("val='{}'", var); LL + println!("val='{var}'"); | -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/unknown_attribute.stderr b/src/tools/clippy/tests/ui/unknown_attribute.stderr index 618c5980d..edad35d15 100644 --- a/src/tools/clippy/tests/ui/unknown_attribute.stderr +++ b/src/tools/clippy/tests/ui/unknown_attribute.stderr @@ -4,5 +4,5 @@ error: usage of unknown attribute LL | #[clippy::unknown] | ^^^^^^^ -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/unnecessary_fallible_conversions.stderr b/src/tools/clippy/tests/ui/unnecessary_fallible_conversions.stderr index b918fdf77..26b152515 100644 --- a/src/tools/clippy/tests/ui/unnecessary_fallible_conversions.stderr +++ b/src/tools/clippy/tests/ui/unnecessary_fallible_conversions.stderr @@ -4,6 +4,7 @@ error: use of a fallible conversion when an infallible one could be used LL | let _: i64 = 0i32.try_into().unwrap(); | ^^^^^^^^^^^^^^^^^^^ help: use: `into()` | + = note: converting `i32` to `i64` cannot fail = note: `-D clippy::unnecessary-fallible-conversions` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::unnecessary_fallible_conversions)]` @@ -12,6 +13,8 @@ error: use of a fallible conversion when an infallible one could be used | LL | let _: i64 = 0i32.try_into().expect("can't happen"); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `into()` + | + = note: converting `i32` to `i64` cannot fail error: aborting due to 2 previous errors diff --git a/src/tools/clippy/tests/ui/unnecessary_fallible_conversions_unfixable.stderr b/src/tools/clippy/tests/ui/unnecessary_fallible_conversions_unfixable.stderr index 286decf8f..033de0e92 100644 --- a/src/tools/clippy/tests/ui/unnecessary_fallible_conversions_unfixable.stderr +++ b/src/tools/clippy/tests/ui/unnecessary_fallible_conversions_unfixable.stderr @@ -4,6 +4,7 @@ error: use of a fallible conversion when an infallible one could be used LL | let _: Result<Foo, _> = 0i64.try_into(); | ^^^^^^^^ help: use: `into` | + = note: converting `i64` to `Foo` cannot fail = note: `-D clippy::unnecessary-fallible-conversions` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::unnecessary_fallible_conversions)]` @@ -12,30 +13,40 @@ error: use of a fallible conversion when an infallible one could be used | LL | let _: Result<Foo, _> = i64::try_into(0i64); | ^^^^^^^^^^^^^ help: use: `Into::into` + | + = note: converting `i64` to `Foo` cannot fail error: use of a fallible conversion when an infallible one could be used --> $DIR/unnecessary_fallible_conversions_unfixable.rs:31:29 | LL | let _: Result<Foo, _> = Foo::try_from(0i64); | ^^^^^^^^^^^^^ help: use: `From::from` + | + = note: converting `i64` to `Foo` cannot fail error: use of a fallible conversion when an infallible one could be used --> $DIR/unnecessary_fallible_conversions_unfixable.rs:34:34 | LL | let _: Result<i64, _> = 0i32.try_into(); | ^^^^^^^^ help: use: `into` + | + = note: converting `i32` to `i64` cannot fail error: use of a fallible conversion when an infallible one could be used --> $DIR/unnecessary_fallible_conversions_unfixable.rs:36:29 | LL | let _: Result<i64, _> = i32::try_into(0i32); | ^^^^^^^^^^^^^ help: use: `Into::into` + | + = note: converting `i32` to `i64` cannot fail error: use of a fallible conversion when an infallible one could be used --> $DIR/unnecessary_fallible_conversions_unfixable.rs:38:29 | LL | let _: Result<i64, _> = <_>::try_from(0i32); | ^^^^^^^^^^^^^ help: use: `From::from` + | + = note: converting `i32` to `i64` cannot fail error: aborting due to 6 previous errors diff --git a/src/tools/clippy/tests/ui/unnecessary_lazy_eval.fixed b/src/tools/clippy/tests/ui/unnecessary_lazy_eval.fixed index 4778eaefd..66598f892 100644 --- a/src/tools/clippy/tests/ui/unnecessary_lazy_eval.fixed +++ b/src/tools/clippy/tests/ui/unnecessary_lazy_eval.fixed @@ -6,6 +6,8 @@ #![allow(clippy::needless_borrow)] #![allow(clippy::unnecessary_literal_unwrap)] #![allow(clippy::unit_arg)] +#![allow(arithmetic_overflow)] +#![allow(unconditional_panic)] use std::ops::Deref; @@ -190,3 +192,79 @@ fn issue9485() { // should not lint, is in proc macro with_span!(span Some(42).unwrap_or_else(|| 2);); } + +fn issue9422(x: usize) -> Option<usize> { + (x >= 5).then(|| x - 5) + // (x >= 5).then_some(x - 5) // clippy suggestion panics +} + +fn panicky_arithmetic_ops(x: usize, y: isize) { + #![allow(clippy::identity_op, clippy::eq_op)] + + // See comments in `eager_or_lazy.rs` for the rules that this is meant to follow + + let _x = false.then_some(i32::MAX + 1); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then_some(i32::MAX * 2); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then_some(i32::MAX - 1); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then_some(i32::MIN - 1); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then_some((1 + 2 * 3 - 2 / 3 + 9) << 2); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then_some(255u8 << 7); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then_some(255u8 << 8); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then_some(255u8 >> 8); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| 255u8 >> x); + let _x = false.then_some(i32::MAX + -1); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then_some(-i32::MAX); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then_some(-i32::MIN); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| -y); + let _x = false.then_some(255 >> -7); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then_some(255 << -1); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then_some(1 / 0); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then_some(x << -1); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then_some(x << 2); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| x + x); + let _x = false.then(|| x * x); + let _x = false.then(|| x - x); + let _x = false.then(|| x / x); + let _x = false.then(|| x % x); + let _x = false.then(|| x + 1); + let _x = false.then(|| 1 + x); + + let _x = false.then_some(x / 0); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then_some(x % 0); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| y / -1); + let _x = false.then_some(1 / -1); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then_some(i32::MIN / -1); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| i32::MIN / x as i32); + let _x = false.then_some(i32::MIN / 0); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then_some(4 / 2); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| 1 / x); + + // const eval doesn't read variables, but floating point math never panics, so we can still emit a + // warning + let f1 = 1.0; + let f2 = 2.0; + let _x = false.then_some(f1 + f2); + //~^ ERROR: unnecessary closure used with `bool::then` +} diff --git a/src/tools/clippy/tests/ui/unnecessary_lazy_eval.rs b/src/tools/clippy/tests/ui/unnecessary_lazy_eval.rs index d4b7fd31b..5045fcd79 100644 --- a/src/tools/clippy/tests/ui/unnecessary_lazy_eval.rs +++ b/src/tools/clippy/tests/ui/unnecessary_lazy_eval.rs @@ -6,6 +6,8 @@ #![allow(clippy::needless_borrow)] #![allow(clippy::unnecessary_literal_unwrap)] #![allow(clippy::unit_arg)] +#![allow(arithmetic_overflow)] +#![allow(unconditional_panic)] use std::ops::Deref; @@ -190,3 +192,79 @@ fn issue9485() { // should not lint, is in proc macro with_span!(span Some(42).unwrap_or_else(|| 2);); } + +fn issue9422(x: usize) -> Option<usize> { + (x >= 5).then(|| x - 5) + // (x >= 5).then_some(x - 5) // clippy suggestion panics +} + +fn panicky_arithmetic_ops(x: usize, y: isize) { + #![allow(clippy::identity_op, clippy::eq_op)] + + // See comments in `eager_or_lazy.rs` for the rules that this is meant to follow + + let _x = false.then(|| i32::MAX + 1); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| i32::MAX * 2); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| i32::MAX - 1); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| i32::MIN - 1); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| (1 + 2 * 3 - 2 / 3 + 9) << 2); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| 255u8 << 7); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| 255u8 << 8); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| 255u8 >> 8); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| 255u8 >> x); + let _x = false.then(|| i32::MAX + -1); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| -i32::MAX); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| -i32::MIN); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| -y); + let _x = false.then(|| 255 >> -7); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| 255 << -1); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| 1 / 0); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| x << -1); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| x << 2); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| x + x); + let _x = false.then(|| x * x); + let _x = false.then(|| x - x); + let _x = false.then(|| x / x); + let _x = false.then(|| x % x); + let _x = false.then(|| x + 1); + let _x = false.then(|| 1 + x); + + let _x = false.then(|| x / 0); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| x % 0); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| y / -1); + let _x = false.then(|| 1 / -1); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| i32::MIN / -1); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| i32::MIN / x as i32); + let _x = false.then(|| i32::MIN / 0); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| 4 / 2); + //~^ ERROR: unnecessary closure used with `bool::then` + let _x = false.then(|| 1 / x); + + // const eval doesn't read variables, but floating point math never panics, so we can still emit a + // warning + let f1 = 1.0; + let f2 = 2.0; + let _x = false.then(|| f1 + f2); + //~^ ERROR: unnecessary closure used with `bool::then` +} diff --git a/src/tools/clippy/tests/ui/unnecessary_lazy_eval.stderr b/src/tools/clippy/tests/ui/unnecessary_lazy_eval.stderr index 1b0db4759..466664aee 100644 --- a/src/tools/clippy/tests/ui/unnecessary_lazy_eval.stderr +++ b/src/tools/clippy/tests/ui/unnecessary_lazy_eval.stderr @@ -1,5 +1,5 @@ error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:69:13 + --> $DIR/unnecessary_lazy_eval.rs:71:13 | LL | let _ = opt.unwrap_or_else(|| 2); | ^^^^-------------------- @@ -10,7 +10,7 @@ LL | let _ = opt.unwrap_or_else(|| 2); = help: to override `-D warnings` add `#[allow(clippy::unnecessary_lazy_evaluations)]` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:70:13 + --> $DIR/unnecessary_lazy_eval.rs:72:13 | LL | let _ = opt.unwrap_or_else(|| astronomers_pi); | ^^^^--------------------------------- @@ -18,7 +18,7 @@ LL | let _ = opt.unwrap_or_else(|| astronomers_pi); | help: use `unwrap_or(..)` instead: `unwrap_or(astronomers_pi)` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:71:13 + --> $DIR/unnecessary_lazy_eval.rs:73:13 | LL | let _ = opt.unwrap_or_else(|| ext_str.some_field); | ^^^^------------------------------------- @@ -26,7 +26,7 @@ LL | let _ = opt.unwrap_or_else(|| ext_str.some_field); | help: use `unwrap_or(..)` instead: `unwrap_or(ext_str.some_field)` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:73:13 + --> $DIR/unnecessary_lazy_eval.rs:75:13 | LL | let _ = opt.and_then(|_| ext_opt); | ^^^^--------------------- @@ -34,7 +34,7 @@ LL | let _ = opt.and_then(|_| ext_opt); | help: use `and(..)` instead: `and(ext_opt)` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:74:13 + --> $DIR/unnecessary_lazy_eval.rs:76:13 | LL | let _ = opt.or_else(|| ext_opt); | ^^^^------------------- @@ -42,7 +42,7 @@ LL | let _ = opt.or_else(|| ext_opt); | help: use `or(..)` instead: `or(ext_opt)` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:75:13 + --> $DIR/unnecessary_lazy_eval.rs:77:13 | LL | let _ = opt.or_else(|| None); | ^^^^---------------- @@ -50,7 +50,7 @@ LL | let _ = opt.or_else(|| None); | help: use `or(..)` instead: `or(None)` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:76:13 + --> $DIR/unnecessary_lazy_eval.rs:78:13 | LL | let _ = opt.get_or_insert_with(|| 2); | ^^^^------------------------ @@ -58,7 +58,7 @@ LL | let _ = opt.get_or_insert_with(|| 2); | help: use `get_or_insert(..)` instead: `get_or_insert(2)` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:77:13 + --> $DIR/unnecessary_lazy_eval.rs:79:13 | LL | let _ = opt.ok_or_else(|| 2); | ^^^^---------------- @@ -66,7 +66,7 @@ LL | let _ = opt.ok_or_else(|| 2); | help: use `ok_or(..)` instead: `ok_or(2)` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:78:13 + --> $DIR/unnecessary_lazy_eval.rs:80:13 | LL | let _ = nested_tuple_opt.unwrap_or_else(|| Some((1, 2))); | ^^^^^^^^^^^^^^^^^------------------------------- @@ -74,7 +74,7 @@ LL | let _ = nested_tuple_opt.unwrap_or_else(|| Some((1, 2))); | help: use `unwrap_or(..)` instead: `unwrap_or(Some((1, 2)))` error: unnecessary closure used with `bool::then` - --> $DIR/unnecessary_lazy_eval.rs:79:13 + --> $DIR/unnecessary_lazy_eval.rs:81:13 | LL | let _ = cond.then(|| astronomers_pi); | ^^^^^----------------------- @@ -82,7 +82,7 @@ LL | let _ = cond.then(|| astronomers_pi); | help: use `then_some(..)` instead: `then_some(astronomers_pi)` error: unnecessary closure used with `bool::then` - --> $DIR/unnecessary_lazy_eval.rs:80:13 + --> $DIR/unnecessary_lazy_eval.rs:82:13 | LL | let _ = true.then(|| -> _ {}); | ^^^^^---------------- @@ -90,7 +90,7 @@ LL | let _ = true.then(|| -> _ {}); | help: use `then_some(..)` instead: `then_some({})` error: unnecessary closure used with `bool::then` - --> $DIR/unnecessary_lazy_eval.rs:81:13 + --> $DIR/unnecessary_lazy_eval.rs:83:13 | LL | let _ = true.then(|| {}); | ^^^^^----------- @@ -98,7 +98,7 @@ LL | let _ = true.then(|| {}); | help: use `then_some(..)` instead: `then_some({})` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:85:13 + --> $DIR/unnecessary_lazy_eval.rs:87:13 | LL | let _ = Some(1).unwrap_or_else(|| *r); | ^^^^^^^^--------------------- @@ -106,7 +106,7 @@ LL | let _ = Some(1).unwrap_or_else(|| *r); | help: use `unwrap_or(..)` instead: `unwrap_or(*r)` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:87:13 + --> $DIR/unnecessary_lazy_eval.rs:89:13 | LL | let _ = Some(1).unwrap_or_else(|| *b); | ^^^^^^^^--------------------- @@ -114,7 +114,7 @@ LL | let _ = Some(1).unwrap_or_else(|| *b); | help: use `unwrap_or(..)` instead: `unwrap_or(*b)` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:89:13 + --> $DIR/unnecessary_lazy_eval.rs:91:13 | LL | let _ = Some(1).as_ref().unwrap_or_else(|| &r); | ^^^^^^^^^^^^^^^^^--------------------- @@ -122,7 +122,7 @@ LL | let _ = Some(1).as_ref().unwrap_or_else(|| &r); | help: use `unwrap_or(..)` instead: `unwrap_or(&r)` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:90:13 + --> $DIR/unnecessary_lazy_eval.rs:92:13 | LL | let _ = Some(1).as_ref().unwrap_or_else(|| &b); | ^^^^^^^^^^^^^^^^^--------------------- @@ -130,7 +130,7 @@ LL | let _ = Some(1).as_ref().unwrap_or_else(|| &b); | help: use `unwrap_or(..)` instead: `unwrap_or(&b)` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:93:13 + --> $DIR/unnecessary_lazy_eval.rs:95:13 | LL | let _ = Some(10).unwrap_or_else(|| 2); | ^^^^^^^^^-------------------- @@ -138,7 +138,7 @@ LL | let _ = Some(10).unwrap_or_else(|| 2); | help: use `unwrap_or(..)` instead: `unwrap_or(2)` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:94:13 + --> $DIR/unnecessary_lazy_eval.rs:96:13 | LL | let _ = Some(10).and_then(|_| ext_opt); | ^^^^^^^^^--------------------- @@ -146,7 +146,7 @@ LL | let _ = Some(10).and_then(|_| ext_opt); | help: use `and(..)` instead: `and(ext_opt)` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:95:28 + --> $DIR/unnecessary_lazy_eval.rs:97:28 | LL | let _: Option<usize> = None.or_else(|| ext_opt); | ^^^^^------------------- @@ -154,7 +154,7 @@ LL | let _: Option<usize> = None.or_else(|| ext_opt); | help: use `or(..)` instead: `or(ext_opt)` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:96:13 + --> $DIR/unnecessary_lazy_eval.rs:98:13 | LL | let _ = None.get_or_insert_with(|| 2); | ^^^^^------------------------ @@ -162,7 +162,7 @@ LL | let _ = None.get_or_insert_with(|| 2); | help: use `get_or_insert(..)` instead: `get_or_insert(2)` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:97:35 + --> $DIR/unnecessary_lazy_eval.rs:99:35 | LL | let _: Result<usize, usize> = None.ok_or_else(|| 2); | ^^^^^---------------- @@ -170,7 +170,7 @@ LL | let _: Result<usize, usize> = None.ok_or_else(|| 2); | help: use `ok_or(..)` instead: `ok_or(2)` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:98:28 + --> $DIR/unnecessary_lazy_eval.rs:100:28 | LL | let _: Option<usize> = None.or_else(|| None); | ^^^^^---------------- @@ -178,7 +178,7 @@ LL | let _: Option<usize> = None.or_else(|| None); | help: use `or(..)` instead: `or(None)` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:101:13 + --> $DIR/unnecessary_lazy_eval.rs:103:13 | LL | let _ = deep.0.unwrap_or_else(|| 2); | ^^^^^^^-------------------- @@ -186,7 +186,7 @@ LL | let _ = deep.0.unwrap_or_else(|| 2); | help: use `unwrap_or(..)` instead: `unwrap_or(2)` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:102:13 + --> $DIR/unnecessary_lazy_eval.rs:104:13 | LL | let _ = deep.0.and_then(|_| ext_opt); | ^^^^^^^--------------------- @@ -194,7 +194,7 @@ LL | let _ = deep.0.and_then(|_| ext_opt); | help: use `and(..)` instead: `and(ext_opt)` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:103:13 + --> $DIR/unnecessary_lazy_eval.rs:105:13 | LL | let _ = deep.0.or_else(|| None); | ^^^^^^^---------------- @@ -202,7 +202,7 @@ LL | let _ = deep.0.or_else(|| None); | help: use `or(..)` instead: `or(None)` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:104:13 + --> $DIR/unnecessary_lazy_eval.rs:106:13 | LL | let _ = deep.0.get_or_insert_with(|| 2); | ^^^^^^^------------------------ @@ -210,7 +210,7 @@ LL | let _ = deep.0.get_or_insert_with(|| 2); | help: use `get_or_insert(..)` instead: `get_or_insert(2)` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:105:13 + --> $DIR/unnecessary_lazy_eval.rs:107:13 | LL | let _ = deep.0.ok_or_else(|| 2); | ^^^^^^^---------------- @@ -218,7 +218,7 @@ LL | let _ = deep.0.ok_or_else(|| 2); | help: use `ok_or(..)` instead: `ok_or(2)` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:135:28 + --> $DIR/unnecessary_lazy_eval.rs:137:28 | LL | let _: Option<usize> = None.or_else(|| Some(3)); | ^^^^^------------------- @@ -226,7 +226,7 @@ LL | let _: Option<usize> = None.or_else(|| Some(3)); | help: use `or(..)` instead: `or(Some(3))` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:136:13 + --> $DIR/unnecessary_lazy_eval.rs:138:13 | LL | let _ = deep.0.or_else(|| Some(3)); | ^^^^^^^------------------- @@ -234,7 +234,7 @@ LL | let _ = deep.0.or_else(|| Some(3)); | help: use `or(..)` instead: `or(Some(3))` error: unnecessary closure used to substitute value for `Option::None` - --> $DIR/unnecessary_lazy_eval.rs:137:13 + --> $DIR/unnecessary_lazy_eval.rs:139:13 | LL | let _ = opt.or_else(|| Some(3)); | ^^^^------------------- @@ -242,7 +242,7 @@ LL | let _ = opt.or_else(|| Some(3)); | help: use `or(..)` instead: `or(Some(3))` error: unnecessary closure used to substitute value for `Result::Err` - --> $DIR/unnecessary_lazy_eval.rs:143:13 + --> $DIR/unnecessary_lazy_eval.rs:145:13 | LL | let _ = res2.unwrap_or_else(|_| 2); | ^^^^^--------------------- @@ -250,7 +250,7 @@ LL | let _ = res2.unwrap_or_else(|_| 2); | help: use `unwrap_or(..)` instead: `unwrap_or(2)` error: unnecessary closure used to substitute value for `Result::Err` - --> $DIR/unnecessary_lazy_eval.rs:144:13 + --> $DIR/unnecessary_lazy_eval.rs:146:13 | LL | let _ = res2.unwrap_or_else(|_| astronomers_pi); | ^^^^^---------------------------------- @@ -258,7 +258,7 @@ LL | let _ = res2.unwrap_or_else(|_| astronomers_pi); | help: use `unwrap_or(..)` instead: `unwrap_or(astronomers_pi)` error: unnecessary closure used to substitute value for `Result::Err` - --> $DIR/unnecessary_lazy_eval.rs:145:13 + --> $DIR/unnecessary_lazy_eval.rs:147:13 | LL | let _ = res2.unwrap_or_else(|_| ext_str.some_field); | ^^^^^-------------------------------------- @@ -266,7 +266,7 @@ LL | let _ = res2.unwrap_or_else(|_| ext_str.some_field); | help: use `unwrap_or(..)` instead: `unwrap_or(ext_str.some_field)` error: unnecessary closure used to substitute value for `Result::Err` - --> $DIR/unnecessary_lazy_eval.rs:167:35 + --> $DIR/unnecessary_lazy_eval.rs:169:35 | LL | let _: Result<usize, usize> = res.and_then(|_| Err(2)); | ^^^^-------------------- @@ -274,7 +274,7 @@ LL | let _: Result<usize, usize> = res.and_then(|_| Err(2)); | help: use `and(..)` instead: `and(Err(2))` error: unnecessary closure used to substitute value for `Result::Err` - --> $DIR/unnecessary_lazy_eval.rs:168:35 + --> $DIR/unnecessary_lazy_eval.rs:170:35 | LL | let _: Result<usize, usize> = res.and_then(|_| Err(astronomers_pi)); | ^^^^--------------------------------- @@ -282,7 +282,7 @@ LL | let _: Result<usize, usize> = res.and_then(|_| Err(astronomers_pi)); | help: use `and(..)` instead: `and(Err(astronomers_pi))` error: unnecessary closure used to substitute value for `Result::Err` - --> $DIR/unnecessary_lazy_eval.rs:169:35 + --> $DIR/unnecessary_lazy_eval.rs:171:35 | LL | let _: Result<usize, usize> = res.and_then(|_| Err(ext_str.some_field)); | ^^^^------------------------------------- @@ -290,7 +290,7 @@ LL | let _: Result<usize, usize> = res.and_then(|_| Err(ext_str.some_field)) | help: use `and(..)` instead: `and(Err(ext_str.some_field))` error: unnecessary closure used to substitute value for `Result::Err` - --> $DIR/unnecessary_lazy_eval.rs:171:35 + --> $DIR/unnecessary_lazy_eval.rs:173:35 | LL | let _: Result<usize, usize> = res.or_else(|_| Ok(2)); | ^^^^------------------ @@ -298,7 +298,7 @@ LL | let _: Result<usize, usize> = res.or_else(|_| Ok(2)); | help: use `or(..)` instead: `or(Ok(2))` error: unnecessary closure used to substitute value for `Result::Err` - --> $DIR/unnecessary_lazy_eval.rs:172:35 + --> $DIR/unnecessary_lazy_eval.rs:174:35 | LL | let _: Result<usize, usize> = res.or_else(|_| Ok(astronomers_pi)); | ^^^^------------------------------- @@ -306,7 +306,7 @@ LL | let _: Result<usize, usize> = res.or_else(|_| Ok(astronomers_pi)); | help: use `or(..)` instead: `or(Ok(astronomers_pi))` error: unnecessary closure used to substitute value for `Result::Err` - --> $DIR/unnecessary_lazy_eval.rs:173:35 + --> $DIR/unnecessary_lazy_eval.rs:175:35 | LL | let _: Result<usize, usize> = res.or_else(|_| Ok(ext_str.some_field)); | ^^^^----------------------------------- @@ -314,7 +314,7 @@ LL | let _: Result<usize, usize> = res.or_else(|_| Ok(ext_str.some_field)); | help: use `or(..)` instead: `or(Ok(ext_str.some_field))` error: unnecessary closure used to substitute value for `Result::Err` - --> $DIR/unnecessary_lazy_eval.rs:174:35 + --> $DIR/unnecessary_lazy_eval.rs:176:35 | LL | let _: Result<usize, usize> = res. | ___________________________________^ @@ -328,5 +328,189 @@ LL | | or_else(|_| Ok(ext_str.some_field)); | | | help: use `or(..)` instead: `or(Ok(ext_str.some_field))` -error: aborting due to 40 previous errors +error: unnecessary closure used with `bool::then` + --> $DIR/unnecessary_lazy_eval.rs:206:14 + | +LL | let _x = false.then(|| i32::MAX + 1); + | ^^^^^^--------------------- + | | + | help: use `then_some(..)` instead: `then_some(i32::MAX + 1)` + +error: unnecessary closure used with `bool::then` + --> $DIR/unnecessary_lazy_eval.rs:208:14 + | +LL | let _x = false.then(|| i32::MAX * 2); + | ^^^^^^--------------------- + | | + | help: use `then_some(..)` instead: `then_some(i32::MAX * 2)` + +error: unnecessary closure used with `bool::then` + --> $DIR/unnecessary_lazy_eval.rs:210:14 + | +LL | let _x = false.then(|| i32::MAX - 1); + | ^^^^^^--------------------- + | | + | help: use `then_some(..)` instead: `then_some(i32::MAX - 1)` + +error: unnecessary closure used with `bool::then` + --> $DIR/unnecessary_lazy_eval.rs:212:14 + | +LL | let _x = false.then(|| i32::MIN - 1); + | ^^^^^^--------------------- + | | + | help: use `then_some(..)` instead: `then_some(i32::MIN - 1)` + +error: unnecessary closure used with `bool::then` + --> $DIR/unnecessary_lazy_eval.rs:214:14 + | +LL | let _x = false.then(|| (1 + 2 * 3 - 2 / 3 + 9) << 2); + | ^^^^^^------------------------------------- + | | + | help: use `then_some(..)` instead: `then_some((1 + 2 * 3 - 2 / 3 + 9) << 2)` + +error: unnecessary closure used with `bool::then` + --> $DIR/unnecessary_lazy_eval.rs:216:14 + | +LL | let _x = false.then(|| 255u8 << 7); + | ^^^^^^------------------- + | | + | help: use `then_some(..)` instead: `then_some(255u8 << 7)` + +error: unnecessary closure used with `bool::then` + --> $DIR/unnecessary_lazy_eval.rs:218:14 + | +LL | let _x = false.then(|| 255u8 << 8); + | ^^^^^^------------------- + | | + | help: use `then_some(..)` instead: `then_some(255u8 << 8)` + +error: unnecessary closure used with `bool::then` + --> $DIR/unnecessary_lazy_eval.rs:220:14 + | +LL | let _x = false.then(|| 255u8 >> 8); + | ^^^^^^------------------- + | | + | help: use `then_some(..)` instead: `then_some(255u8 >> 8)` + +error: unnecessary closure used with `bool::then` + --> $DIR/unnecessary_lazy_eval.rs:223:14 + | +LL | let _x = false.then(|| i32::MAX + -1); + | ^^^^^^---------------------- + | | + | help: use `then_some(..)` instead: `then_some(i32::MAX + -1)` + +error: unnecessary closure used with `bool::then` + --> $DIR/unnecessary_lazy_eval.rs:225:14 + | +LL | let _x = false.then(|| -i32::MAX); + | ^^^^^^------------------ + | | + | help: use `then_some(..)` instead: `then_some(-i32::MAX)` + +error: unnecessary closure used with `bool::then` + --> $DIR/unnecessary_lazy_eval.rs:227:14 + | +LL | let _x = false.then(|| -i32::MIN); + | ^^^^^^------------------ + | | + | help: use `then_some(..)` instead: `then_some(-i32::MIN)` + +error: unnecessary closure used with `bool::then` + --> $DIR/unnecessary_lazy_eval.rs:230:14 + | +LL | let _x = false.then(|| 255 >> -7); + | ^^^^^^------------------ + | | + | help: use `then_some(..)` instead: `then_some(255 >> -7)` + +error: unnecessary closure used with `bool::then` + --> $DIR/unnecessary_lazy_eval.rs:232:14 + | +LL | let _x = false.then(|| 255 << -1); + | ^^^^^^------------------ + | | + | help: use `then_some(..)` instead: `then_some(255 << -1)` + +error: unnecessary closure used with `bool::then` + --> $DIR/unnecessary_lazy_eval.rs:234:14 + | +LL | let _x = false.then(|| 1 / 0); + | ^^^^^^-------------- + | | + | help: use `then_some(..)` instead: `then_some(1 / 0)` + +error: unnecessary closure used with `bool::then` + --> $DIR/unnecessary_lazy_eval.rs:236:14 + | +LL | let _x = false.then(|| x << -1); + | ^^^^^^---------------- + | | + | help: use `then_some(..)` instead: `then_some(x << -1)` + +error: unnecessary closure used with `bool::then` + --> $DIR/unnecessary_lazy_eval.rs:238:14 + | +LL | let _x = false.then(|| x << 2); + | ^^^^^^--------------- + | | + | help: use `then_some(..)` instead: `then_some(x << 2)` + +error: unnecessary closure used with `bool::then` + --> $DIR/unnecessary_lazy_eval.rs:248:14 + | +LL | let _x = false.then(|| x / 0); + | ^^^^^^-------------- + | | + | help: use `then_some(..)` instead: `then_some(x / 0)` + +error: unnecessary closure used with `bool::then` + --> $DIR/unnecessary_lazy_eval.rs:250:14 + | +LL | let _x = false.then(|| x % 0); + | ^^^^^^-------------- + | | + | help: use `then_some(..)` instead: `then_some(x % 0)` + +error: unnecessary closure used with `bool::then` + --> $DIR/unnecessary_lazy_eval.rs:253:14 + | +LL | let _x = false.then(|| 1 / -1); + | ^^^^^^--------------- + | | + | help: use `then_some(..)` instead: `then_some(1 / -1)` + +error: unnecessary closure used with `bool::then` + --> $DIR/unnecessary_lazy_eval.rs:255:14 + | +LL | let _x = false.then(|| i32::MIN / -1); + | ^^^^^^---------------------- + | | + | help: use `then_some(..)` instead: `then_some(i32::MIN / -1)` + +error: unnecessary closure used with `bool::then` + --> $DIR/unnecessary_lazy_eval.rs:258:14 + | +LL | let _x = false.then(|| i32::MIN / 0); + | ^^^^^^--------------------- + | | + | help: use `then_some(..)` instead: `then_some(i32::MIN / 0)` + +error: unnecessary closure used with `bool::then` + --> $DIR/unnecessary_lazy_eval.rs:260:14 + | +LL | let _x = false.then(|| 4 / 2); + | ^^^^^^-------------- + | | + | help: use `then_some(..)` instead: `then_some(4 / 2)` + +error: unnecessary closure used with `bool::then` + --> $DIR/unnecessary_lazy_eval.rs:268:14 + | +LL | let _x = false.then(|| f1 + f2); + | ^^^^^^---------------- + | | + | help: use `then_some(..)` instead: `then_some(f1 + f2)` + +error: aborting due to 63 previous errors diff --git a/src/tools/clippy/tests/ui/unnecessary_operation.fixed b/src/tools/clippy/tests/ui/unnecessary_operation.fixed index d0c0298ef..463412dae 100644 --- a/src/tools/clippy/tests/ui/unnecessary_operation.fixed +++ b/src/tools/clippy/tests/ui/unnecessary_operation.fixed @@ -7,6 +7,9 @@ )] #![warn(clippy::unnecessary_operation)] +use std::fmt::Display; +use std::ops::Shl; + struct Tuple(i32); struct Struct { field: i32, @@ -50,6 +53,19 @@ fn get_drop_struct() -> DropStruct { DropStruct { field: 0 } } +struct Cout; + +impl<T> Shl<T> for Cout +where + T: Display, +{ + type Output = Self; + fn shl(self, rhs: T) -> Self::Output { + println!("{}", rhs); + self + } +} + fn main() { get_number(); get_number(); @@ -87,4 +103,7 @@ fn main() { ($($e:expr),*) => {{ $($e;)* }} } use_expr!(isize::MIN / -(one() as isize), i8::MIN / -one()); + + // Issue #11885 + Cout << 16; } diff --git a/src/tools/clippy/tests/ui/unnecessary_operation.rs b/src/tools/clippy/tests/ui/unnecessary_operation.rs index e8e3a2d56..f0d28e289 100644 --- a/src/tools/clippy/tests/ui/unnecessary_operation.rs +++ b/src/tools/clippy/tests/ui/unnecessary_operation.rs @@ -7,6 +7,9 @@ )] #![warn(clippy::unnecessary_operation)] +use std::fmt::Display; +use std::ops::Shl; + struct Tuple(i32); struct Struct { field: i32, @@ -50,6 +53,19 @@ fn get_drop_struct() -> DropStruct { DropStruct { field: 0 } } +struct Cout; + +impl<T> Shl<T> for Cout +where + T: Display, +{ + type Output = Self; + fn shl(self, rhs: T) -> Self::Output { + println!("{}", rhs); + self + } +} + fn main() { Tuple(get_number()); Struct { field: get_number() }; @@ -91,4 +107,7 @@ fn main() { ($($e:expr),*) => {{ $($e;)* }} } use_expr!(isize::MIN / -(one() as isize), i8::MIN / -one()); + + // Issue #11885 + Cout << 16; } diff --git a/src/tools/clippy/tests/ui/unnecessary_operation.stderr b/src/tools/clippy/tests/ui/unnecessary_operation.stderr index fbe495f51..eeee9ad60 100644 --- a/src/tools/clippy/tests/ui/unnecessary_operation.stderr +++ b/src/tools/clippy/tests/ui/unnecessary_operation.stderr @@ -1,5 +1,5 @@ error: unnecessary operation - --> $DIR/unnecessary_operation.rs:54:5 + --> $DIR/unnecessary_operation.rs:70:5 | LL | Tuple(get_number()); | ^^^^^^^^^^^^^^^^^^^^ help: statement can be reduced to: `get_number();` @@ -8,103 +8,103 @@ LL | Tuple(get_number()); = help: to override `-D warnings` add `#[allow(clippy::unnecessary_operation)]` error: unnecessary operation - --> $DIR/unnecessary_operation.rs:55:5 + --> $DIR/unnecessary_operation.rs:71:5 | LL | Struct { field: get_number() }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: statement can be reduced to: `get_number();` error: unnecessary operation - --> $DIR/unnecessary_operation.rs:56:5 + --> $DIR/unnecessary_operation.rs:72:5 | LL | Struct { ..get_struct() }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: statement can be reduced to: `get_struct();` error: unnecessary operation - --> $DIR/unnecessary_operation.rs:57:5 + --> $DIR/unnecessary_operation.rs:73:5 | LL | Enum::Tuple(get_number()); | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: statement can be reduced to: `get_number();` error: unnecessary operation - --> $DIR/unnecessary_operation.rs:58:5 + --> $DIR/unnecessary_operation.rs:74:5 | LL | Enum::Struct { field: get_number() }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: statement can be reduced to: `get_number();` error: unnecessary operation - --> $DIR/unnecessary_operation.rs:59:5 + --> $DIR/unnecessary_operation.rs:75:5 | LL | 5 + get_number(); | ^^^^^^^^^^^^^^^^^ help: statement can be reduced to: `5;get_number();` error: unnecessary operation - --> $DIR/unnecessary_operation.rs:60:5 + --> $DIR/unnecessary_operation.rs:76:5 | LL | *&get_number(); | ^^^^^^^^^^^^^^^ help: statement can be reduced to: `get_number();` error: unnecessary operation - --> $DIR/unnecessary_operation.rs:61:5 + --> $DIR/unnecessary_operation.rs:77:5 | LL | &get_number(); | ^^^^^^^^^^^^^^ help: statement can be reduced to: `get_number();` error: unnecessary operation - --> $DIR/unnecessary_operation.rs:62:5 + --> $DIR/unnecessary_operation.rs:78:5 | LL | (5, 6, get_number()); | ^^^^^^^^^^^^^^^^^^^^^ help: statement can be reduced to: `5;6;get_number();` error: unnecessary operation - --> $DIR/unnecessary_operation.rs:63:5 + --> $DIR/unnecessary_operation.rs:79:5 | LL | get_number()..; | ^^^^^^^^^^^^^^^ help: statement can be reduced to: `get_number();` error: unnecessary operation - --> $DIR/unnecessary_operation.rs:64:5 + --> $DIR/unnecessary_operation.rs:80:5 | LL | ..get_number(); | ^^^^^^^^^^^^^^^ help: statement can be reduced to: `get_number();` error: unnecessary operation - --> $DIR/unnecessary_operation.rs:65:5 + --> $DIR/unnecessary_operation.rs:81:5 | LL | 5..get_number(); | ^^^^^^^^^^^^^^^^ help: statement can be reduced to: `5;get_number();` error: unnecessary operation - --> $DIR/unnecessary_operation.rs:66:5 + --> $DIR/unnecessary_operation.rs:82:5 | LL | [42, get_number()]; | ^^^^^^^^^^^^^^^^^^^ help: statement can be reduced to: `42;get_number();` error: unnecessary operation - --> $DIR/unnecessary_operation.rs:67:5 + --> $DIR/unnecessary_operation.rs:83:5 | LL | [42, 55][get_usize()]; | ^^^^^^^^^^^^^^^^^^^^^^ help: statement can be written as: `assert!([42, 55].len() > get_usize());` error: unnecessary operation - --> $DIR/unnecessary_operation.rs:68:5 + --> $DIR/unnecessary_operation.rs:84:5 | LL | (42, get_number()).1; | ^^^^^^^^^^^^^^^^^^^^^ help: statement can be reduced to: `42;get_number();` error: unnecessary operation - --> $DIR/unnecessary_operation.rs:69:5 + --> $DIR/unnecessary_operation.rs:85:5 | LL | [get_number(); 55]; | ^^^^^^^^^^^^^^^^^^^ help: statement can be reduced to: `get_number();` error: unnecessary operation - --> $DIR/unnecessary_operation.rs:70:5 + --> $DIR/unnecessary_operation.rs:86:5 | LL | [42; 55][get_usize()]; | ^^^^^^^^^^^^^^^^^^^^^^ help: statement can be written as: `assert!([42; 55].len() > get_usize());` error: unnecessary operation - --> $DIR/unnecessary_operation.rs:71:5 + --> $DIR/unnecessary_operation.rs:87:5 | LL | / { LL | | get_number() @@ -112,7 +112,7 @@ LL | | }; | |______^ help: statement can be reduced to: `get_number();` error: unnecessary operation - --> $DIR/unnecessary_operation.rs:74:5 + --> $DIR/unnecessary_operation.rs:90:5 | LL | / FooString { LL | | s: String::from("blah"), diff --git a/src/tools/clippy/tests/ui/upper_case_acronyms.fixed b/src/tools/clippy/tests/ui/upper_case_acronyms.fixed index 460567b09..a8023ed00 100644 --- a/src/tools/clippy/tests/ui/upper_case_acronyms.fixed +++ b/src/tools/clippy/tests/ui/upper_case_acronyms.fixed @@ -59,4 +59,12 @@ enum Yaml { Str(String), } +// test for issue #7708 +enum AllowOnField { + Disallow, + //~^ ERROR: name `DISALLOW` contains a capitalized acronym + #[allow(clippy::upper_case_acronyms)] + ALLOW, +} + fn main() {} diff --git a/src/tools/clippy/tests/ui/upper_case_acronyms.rs b/src/tools/clippy/tests/ui/upper_case_acronyms.rs index 6a20aee62..c4711b87e 100644 --- a/src/tools/clippy/tests/ui/upper_case_acronyms.rs +++ b/src/tools/clippy/tests/ui/upper_case_acronyms.rs @@ -59,4 +59,12 @@ enum YAML { Str(String), } +// test for issue #7708 +enum AllowOnField { + DISALLOW, + //~^ ERROR: name `DISALLOW` contains a capitalized acronym + #[allow(clippy::upper_case_acronyms)] + ALLOW, +} + fn main() {} diff --git a/src/tools/clippy/tests/ui/upper_case_acronyms.stderr b/src/tools/clippy/tests/ui/upper_case_acronyms.stderr index c57b325e9..009c53c72 100644 --- a/src/tools/clippy/tests/ui/upper_case_acronyms.stderr +++ b/src/tools/clippy/tests/ui/upper_case_acronyms.stderr @@ -67,5 +67,11 @@ error: name `YAML` contains a capitalized acronym LL | enum YAML { | ^^^^ help: consider making the acronym lowercase, except the initial letter: `Yaml` -error: aborting due to 11 previous errors +error: name `DISALLOW` contains a capitalized acronym + --> $DIR/upper_case_acronyms.rs:64:5 + | +LL | DISALLOW, + | ^^^^^^^^ help: consider making the acronym lowercase, except the initial letter: `Disallow` + +error: aborting due to 12 previous errors diff --git a/src/tools/clippy/tests/ui/vec.fixed b/src/tools/clippy/tests/ui/vec.fixed index bcbca971a..81b8bd7da 100644 --- a/src/tools/clippy/tests/ui/vec.fixed +++ b/src/tools/clippy/tests/ui/vec.fixed @@ -176,3 +176,37 @@ fn below() { let _: String = a; } } + +fn func_needing_vec(_bar: usize, _baz: Vec<usize>) {} +fn func_not_needing_vec(_bar: usize, _baz: usize) {} + +fn issue11861() { + macro_rules! this_macro_needs_vec { + ($x:expr) => {{ + func_needing_vec($x.iter().sum(), $x); + for _ in $x {} + }}; + } + macro_rules! this_macro_doesnt_need_vec { + ($x:expr) => {{ func_not_needing_vec($x.iter().sum(), $x.iter().sum()) }}; + } + + // Do not lint the next line + this_macro_needs_vec!(vec![1]); + this_macro_doesnt_need_vec!([1]); //~ ERROR: useless use of `vec!` + + macro_rules! m { + ($x:expr) => { + fn f2() { + let _x: Vec<i32> = $x; + } + fn f() { + let _x = $x; + $x.starts_with(&[]); + } + }; + } + + // should not lint + m!(vec![1]); +} diff --git a/src/tools/clippy/tests/ui/vec.rs b/src/tools/clippy/tests/ui/vec.rs index 087425585..5aca9b292 100644 --- a/src/tools/clippy/tests/ui/vec.rs +++ b/src/tools/clippy/tests/ui/vec.rs @@ -176,3 +176,37 @@ fn below() { let _: String = a; } } + +fn func_needing_vec(_bar: usize, _baz: Vec<usize>) {} +fn func_not_needing_vec(_bar: usize, _baz: usize) {} + +fn issue11861() { + macro_rules! this_macro_needs_vec { + ($x:expr) => {{ + func_needing_vec($x.iter().sum(), $x); + for _ in $x {} + }}; + } + macro_rules! this_macro_doesnt_need_vec { + ($x:expr) => {{ func_not_needing_vec($x.iter().sum(), $x.iter().sum()) }}; + } + + // Do not lint the next line + this_macro_needs_vec!(vec![1]); + this_macro_doesnt_need_vec!(vec![1]); //~ ERROR: useless use of `vec!` + + macro_rules! m { + ($x:expr) => { + fn f2() { + let _x: Vec<i32> = $x; + } + fn f() { + let _x = $x; + $x.starts_with(&[]); + } + }; + } + + // should not lint + m!(vec![1]); +} diff --git a/src/tools/clippy/tests/ui/vec.stderr b/src/tools/clippy/tests/ui/vec.stderr index fc261838f..c9018f94f 100644 --- a/src/tools/clippy/tests/ui/vec.stderr +++ b/src/tools/clippy/tests/ui/vec.stderr @@ -115,5 +115,11 @@ error: useless use of `vec!` LL | for a in vec![String::new(), String::new()] { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: you can use an array directly: `[String::new(), String::new()]` -error: aborting due to 19 previous errors +error: useless use of `vec!` + --> $DIR/vec.rs:196:33 + | +LL | this_macro_doesnt_need_vec!(vec![1]); + | ^^^^^^^ help: you can use an array directly: `[1]` + +error: aborting due to 20 previous errors diff --git a/src/tools/clippy/tests/ui/vec_box_sized.fixed b/src/tools/clippy/tests/ui/vec_box_sized.fixed deleted file mode 100644 index 4363d2224..000000000 --- a/src/tools/clippy/tests/ui/vec_box_sized.fixed +++ /dev/null @@ -1,57 +0,0 @@ -#![allow(dead_code)] - -struct SizedStruct(i32); -struct UnsizedStruct([i32]); -struct BigStruct([i32; 10000]); - -/// The following should trigger the lint -mod should_trigger { - use super::SizedStruct; - const C: Vec<i32> = Vec::new(); - static S: Vec<i32> = Vec::new(); - - struct StructWithVecBox { - sized_type: Vec<SizedStruct>, - } - - struct A(Vec<SizedStruct>); - struct B(Vec<Vec<u32>>); -} - -/// The following should not trigger the lint -mod should_not_trigger { - use super::{BigStruct, UnsizedStruct}; - - struct C(Vec<Box<UnsizedStruct>>); - struct D(Vec<Box<BigStruct>>); - - struct StructWithVecBoxButItsUnsized { - unsized_type: Vec<Box<UnsizedStruct>>, - } - - struct TraitVec<T: ?Sized> { - // Regression test for #3720. This was causing an ICE. - inner: Vec<Box<T>>, - } -} - -mod inner_mod { - mod inner { - pub struct S; - } - - mod inner2 { - use super::inner::S; - - pub fn f() -> Vec<S> { - vec![] - } - } -} - -// https://github.com/rust-lang/rust-clippy/issues/11417 -fn in_closure() { - let _ = |_: Vec<Box<dyn ToString>>| {}; -} - -fn main() {} diff --git a/src/tools/clippy/tests/ui/vec_box_sized.rs b/src/tools/clippy/tests/ui/vec_box_sized.rs index f4e27fe4b..49eaf8e06 100644 --- a/src/tools/clippy/tests/ui/vec_box_sized.rs +++ b/src/tools/clippy/tests/ui/vec_box_sized.rs @@ -1,12 +1,28 @@ +//@no-rustfix + #![allow(dead_code)] +#![feature(allocator_api)] + +use std::alloc::{AllocError, Allocator, Layout}; +use std::ptr::NonNull; struct SizedStruct(i32); struct UnsizedStruct([i32]); struct BigStruct([i32; 10000]); +struct DummyAllocator; +unsafe impl Allocator for DummyAllocator { + fn allocate(&self, layout: Layout) -> Result<NonNull<[u8]>, AllocError> { + todo!() + } + unsafe fn deallocate(&self, ptr: NonNull<u8>, layout: Layout) { + todo!() + } +} + /// The following should trigger the lint mod should_trigger { - use super::SizedStruct; + use super::{DummyAllocator, SizedStruct}; const C: Vec<Box<i32>> = Vec::new(); static S: Vec<Box<i32>> = Vec::new(); @@ -16,11 +32,21 @@ mod should_trigger { struct A(Vec<Box<SizedStruct>>); struct B(Vec<Vec<Box<(u32)>>>); + + fn allocator_global_defined_vec() -> Vec<Box<i32>, std::alloc::Global> { + Vec::new() + } + fn allocator_global_defined_box() -> Vec<Box<i32, std::alloc::Global>> { + Vec::new() + } + fn allocator_match() -> Vec<Box<i32, DummyAllocator>, DummyAllocator> { + Vec::new_in(DummyAllocator) + } } /// The following should not trigger the lint mod should_not_trigger { - use super::{BigStruct, UnsizedStruct}; + use super::{BigStruct, DummyAllocator, UnsizedStruct}; struct C(Vec<Box<UnsizedStruct>>); struct D(Vec<Box<BigStruct>>); @@ -33,6 +59,13 @@ mod should_not_trigger { // Regression test for #3720. This was causing an ICE. inner: Vec<Box<T>>, } + + fn allocator_mismatch() -> Vec<Box<i32, DummyAllocator>> { + Vec::new() + } + fn allocator_mismatch_2() -> Vec<Box<i32>, DummyAllocator> { + Vec::new_in(DummyAllocator) + } } mod inner_mod { diff --git a/src/tools/clippy/tests/ui/vec_box_sized.stderr b/src/tools/clippy/tests/ui/vec_box_sized.stderr index 9118f284b..d6479271f 100644 --- a/src/tools/clippy/tests/ui/vec_box_sized.stderr +++ b/src/tools/clippy/tests/ui/vec_box_sized.stderr @@ -1,5 +1,5 @@ error: `Vec<T>` is already on the heap, the boxing is unnecessary - --> $DIR/vec_box_sized.rs:10:14 + --> $DIR/vec_box_sized.rs:26:14 | LL | const C: Vec<Box<i32>> = Vec::new(); | ^^^^^^^^^^^^^ help: try: `Vec<i32>` @@ -8,34 +8,52 @@ LL | const C: Vec<Box<i32>> = Vec::new(); = help: to override `-D warnings` add `#[allow(clippy::vec_box)]` error: `Vec<T>` is already on the heap, the boxing is unnecessary - --> $DIR/vec_box_sized.rs:11:15 + --> $DIR/vec_box_sized.rs:27:15 | LL | static S: Vec<Box<i32>> = Vec::new(); | ^^^^^^^^^^^^^ help: try: `Vec<i32>` error: `Vec<T>` is already on the heap, the boxing is unnecessary - --> $DIR/vec_box_sized.rs:14:21 + --> $DIR/vec_box_sized.rs:30:21 | LL | sized_type: Vec<Box<SizedStruct>>, | ^^^^^^^^^^^^^^^^^^^^^ help: try: `Vec<SizedStruct>` error: `Vec<T>` is already on the heap, the boxing is unnecessary - --> $DIR/vec_box_sized.rs:17:14 + --> $DIR/vec_box_sized.rs:33:14 | LL | struct A(Vec<Box<SizedStruct>>); | ^^^^^^^^^^^^^^^^^^^^^ help: try: `Vec<SizedStruct>` error: `Vec<T>` is already on the heap, the boxing is unnecessary - --> $DIR/vec_box_sized.rs:18:18 + --> $DIR/vec_box_sized.rs:34:18 | LL | struct B(Vec<Vec<Box<(u32)>>>); | ^^^^^^^^^^^^^^^ help: try: `Vec<u32>` error: `Vec<T>` is already on the heap, the boxing is unnecessary - --> $DIR/vec_box_sized.rs:46:23 + --> $DIR/vec_box_sized.rs:36:42 + | +LL | fn allocator_global_defined_vec() -> Vec<Box<i32>, std::alloc::Global> { + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `Vec<i32>` + +error: `Vec<T>` is already on the heap, the boxing is unnecessary + --> $DIR/vec_box_sized.rs:39:42 + | +LL | fn allocator_global_defined_box() -> Vec<Box<i32, std::alloc::Global>> { + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `Vec<i32>` + +error: `Vec<T>` is already on the heap, the boxing is unnecessary + --> $DIR/vec_box_sized.rs:42:29 + | +LL | fn allocator_match() -> Vec<Box<i32, DummyAllocator>, DummyAllocator> { + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `Vec<i32>` + +error: `Vec<T>` is already on the heap, the boxing is unnecessary + --> $DIR/vec_box_sized.rs:79:23 | LL | pub fn f() -> Vec<Box<S>> { | ^^^^^^^^^^^ help: try: `Vec<S>` -error: aborting due to 6 previous errors +error: aborting due to 9 previous errors diff --git a/src/tools/clippy/tests/ui/vec_resize_to_zero.stderr b/src/tools/clippy/tests/ui/vec_resize_to_zero.stderr index 715c9923b..c16ba4e52 100644 --- a/src/tools/clippy/tests/ui/vec_resize_to_zero.stderr +++ b/src/tools/clippy/tests/ui/vec_resize_to_zero.stderr @@ -10,5 +10,5 @@ LL | v.resize(0, 5); = note: `-D clippy::vec-resize-to-zero` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::vec_resize_to_zero)]` -error: aborting due to previous error +error: aborting due to 1 previous error diff --git a/src/tools/clippy/tests/ui/vtable_address_comparisons.rs b/src/tools/clippy/tests/ui/vtable_address_comparisons.rs deleted file mode 100644 index 75647c027..000000000 --- a/src/tools/clippy/tests/ui/vtable_address_comparisons.rs +++ /dev/null @@ -1,52 +0,0 @@ -use std::fmt::Debug; -use std::ptr; -use std::rc::Rc; -use std::sync::Arc; - -#[warn(clippy::vtable_address_comparisons)] -#[allow(clippy::borrow_as_ptr)] - -fn main() { - let a: *const dyn Debug = &1 as &dyn Debug; - let b: *const dyn Debug = &1 as &dyn Debug; - - // These should fail: - let _ = a == b; - //~^ ERROR: comparing trait object pointers compares a non-unique vtable address - let _ = a != b; - //~^ ERROR: comparing trait object pointers compares a non-unique vtable address - let _ = a < b; - //~^ ERROR: comparing trait object pointers compares a non-unique vtable address - let _ = a <= b; - //~^ ERROR: comparing trait object pointers compares a non-unique vtable address - let _ = a > b; - //~^ ERROR: comparing trait object pointers compares a non-unique vtable address - let _ = a >= b; - //~^ ERROR: comparing trait object pointers compares a non-unique vtable address - ptr::eq(a, b); - //~^ ERROR: comparing trait object pointers compares a non-unique vtable address - - let a = &1 as &dyn Debug; - let b = &1 as &dyn Debug; - ptr::eq(a, b); - //~^ ERROR: comparing trait object pointers compares a non-unique vtable address - - // These should be fine: - let a = &1; - ptr::eq(a, a); - - let a = Rc::new(1); - Rc::ptr_eq(&a, &a); - - let a = Arc::new(1); - Arc::ptr_eq(&a, &a); - - let a: Rc<dyn Debug> = Rc::new(1); - Rc::ptr_eq(&a, &a); - - let a: Arc<dyn Debug> = Arc::new(1); - Arc::ptr_eq(&a, &a); - - let a: &[u8] = b""; - ptr::eq(a, a); -} diff --git a/src/tools/clippy/tests/ui/vtable_address_comparisons.stderr b/src/tools/clippy/tests/ui/vtable_address_comparisons.stderr deleted file mode 100644 index 83c82f379..000000000 --- a/src/tools/clippy/tests/ui/vtable_address_comparisons.stderr +++ /dev/null @@ -1,68 +0,0 @@ -error: comparing trait object pointers compares a non-unique vtable address - --> $DIR/vtable_address_comparisons.rs:14:13 - | -LL | let _ = a == b; - | ^^^^^^ - | - = help: consider extracting and comparing data pointers only - = note: `-D clippy::vtable-address-comparisons` implied by `-D warnings` - = help: to override `-D warnings` add `#[allow(clippy::vtable_address_comparisons)]` - -error: comparing trait object pointers compares a non-unique vtable address - --> $DIR/vtable_address_comparisons.rs:16:13 - | -LL | let _ = a != b; - | ^^^^^^ - | - = help: consider extracting and comparing data pointers only - -error: comparing trait object pointers compares a non-unique vtable address - --> $DIR/vtable_address_comparisons.rs:18:13 - | -LL | let _ = a < b; - | ^^^^^ - | - = help: consider extracting and comparing data pointers only - -error: comparing trait object pointers compares a non-unique vtable address - --> $DIR/vtable_address_comparisons.rs:20:13 - | -LL | let _ = a <= b; - | ^^^^^^ - | - = help: consider extracting and comparing data pointers only - -error: comparing trait object pointers compares a non-unique vtable address - --> $DIR/vtable_address_comparisons.rs:22:13 - | -LL | let _ = a > b; - | ^^^^^ - | - = help: consider extracting and comparing data pointers only - -error: comparing trait object pointers compares a non-unique vtable address - --> $DIR/vtable_address_comparisons.rs:24:13 - | -LL | let _ = a >= b; - | ^^^^^^ - | - = help: consider extracting and comparing data pointers only - -error: comparing trait object pointers compares a non-unique vtable address - --> $DIR/vtable_address_comparisons.rs:26:5 - | -LL | ptr::eq(a, b); - | ^^^^^^^^^^^^^ - | - = help: consider extracting and comparing data pointers only - -error: comparing trait object pointers compares a non-unique vtable address - --> $DIR/vtable_address_comparisons.rs:31:5 - | -LL | ptr::eq(a, b); - | ^^^^^^^^^^^^^ - | - = help: consider extracting and comparing data pointers only - -error: aborting due to 8 previous errors - diff --git a/src/tools/clippy/triagebot.toml b/src/tools/clippy/triagebot.toml index 419b3c30d..96085bcf9 100644 --- a/src/tools/clippy/triagebot.toml +++ b/src/tools/clippy/triagebot.toml @@ -19,6 +19,7 @@ new_pr = true [assign] contributing_url = "https://github.com/rust-lang/rust-clippy/blob/master/CONTRIBUTING.md" +users_on_vacation = ["blyxyas"] [assign.owners] "/.github" = ["@flip1995"] @@ -33,5 +34,4 @@ contributing_url = "https://github.com/rust-lang/rust-clippy/blob/master/CONTRIB "@dswij", "@Jarcho", "@blyxyas", - "@Centri3", ] |