diff options
| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:43 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:43 +0000 |
| commit | 3e3e70d529d8c7d7c4d7bc4fefc9f109393b9245 (patch) | |
| tree | daf049b282ab10e8c3d03e409b3cd84ff3f7690c /src/tools/clippy | |
| parent | Adding debian version 1.68.2+dfsg1-1. (diff) | |
| download | rustc-3e3e70d529d8c7d7c4d7bc4fefc9f109393b9245.tar.xz rustc-3e3e70d529d8c7d7c4d7bc4fefc9f109393b9245.zip | |
Merging upstream version 1.69.0+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/tools/clippy')
314 files changed, 7732 insertions, 1640 deletions
diff --git a/src/tools/clippy/.github/workflows/clippy_bors.yml b/src/tools/clippy/.github/workflows/clippy_bors.yml index 1bc457a94..24e677ce8 100644 --- a/src/tools/clippy/.github/workflows/clippy_bors.yml +++ b/src/tools/clippy/.github/workflows/clippy_bors.yml @@ -157,6 +157,11 @@ jobs: - name: Test metadata collection run: cargo collect-metadata + - name: Test lint_configuration.md is up-to-date + run: | + echo "run \`cargo collect-metadata\` if this fails" + git update-index --refresh + integration_build: needs: changelog runs-on: ubuntu-latest diff --git a/src/tools/clippy/CHANGELOG.md b/src/tools/clippy/CHANGELOG.md index 8e31e8f0d..765826ed8 100644 --- a/src/tools/clippy/CHANGELOG.md +++ b/src/tools/clippy/CHANGELOG.md @@ -6,11 +6,204 @@ document. ## Unreleased / Beta / In Rust Nightly -[4f142aa1...master](https://github.com/rust-lang/rust-clippy/compare/4f142aa1...master) +[d822110d...master](https://github.com/rust-lang/rust-clippy/compare/d822110d...master) + +## Rust 1.67 + +Current stable, released 2023-01-26 + +[4f142aa1...d822110d](https://github.com/rust-lang/rust-clippy/compare/4f142aa1...d822110d) + +### New Lints + +* [`seek_from_current`] + [#9681](https://github.com/rust-lang/rust-clippy/pull/9681) +* [`from_raw_with_void_ptr`] + [#9690](https://github.com/rust-lang/rust-clippy/pull/9690) +* [`misnamed_getters`] + [#9770](https://github.com/rust-lang/rust-clippy/pull/9770) +* [`seek_to_start_instead_of_rewind`] + [#9667](https://github.com/rust-lang/rust-clippy/pull/9667) +* [`suspicious_xor_used_as_pow`] + [#9506](https://github.com/rust-lang/rust-clippy/pull/9506) +* [`unnecessary_safety_doc`] + [#9822](https://github.com/rust-lang/rust-clippy/pull/9822) +* [`unchecked_duration_subtraction`] + [#9570](https://github.com/rust-lang/rust-clippy/pull/9570) +* [`manual_is_ascii_check`] + [#9765](https://github.com/rust-lang/rust-clippy/pull/9765) +* [`unnecessary_safety_comment`] + [#9851](https://github.com/rust-lang/rust-clippy/pull/9851) +* [`let_underscore_future`] + [#9760](https://github.com/rust-lang/rust-clippy/pull/9760) +* [`manual_let_else`] + [#8437](https://github.com/rust-lang/rust-clippy/pull/8437) + +### Moves and Deprecations + +* Moved [`uninlined_format_args`] to `style` (Now warn-by-default) + [#9865](https://github.com/rust-lang/rust-clippy/pull/9865) +* Moved [`needless_collect`] to `nursery` (Now allow-by-default) + [#9705](https://github.com/rust-lang/rust-clippy/pull/9705) +* Moved [`or_fun_call`] to `nursery` (Now allow-by-default) + [#9829](https://github.com/rust-lang/rust-clippy/pull/9829) +* Uplifted [`let_underscore_lock`] into rustc + [#9697](https://github.com/rust-lang/rust-clippy/pull/9697) +* Uplifted [`let_underscore_drop`] into rustc + [#9697](https://github.com/rust-lang/rust-clippy/pull/9697) +* Moved [`bool_to_int_with_if`] to `pedantic` (Now allow-by-default) + [#9830](https://github.com/rust-lang/rust-clippy/pull/9830) +* Move `index_refutable_slice` to `pedantic` (Now warn-by-default) + [#9975](https://github.com/rust-lang/rust-clippy/pull/9975) +* Moved [`manual_clamp`] to `nursery` (Now allow-by-default) + [#10101](https://github.com/rust-lang/rust-clippy/pull/10101) + +### Enhancements + +* The scope of `#![clippy::msrv]` is now tracked correctly + [#9924](https://github.com/rust-lang/rust-clippy/pull/9924) +* `#[clippy::msrv]` can now be used as an outer attribute + [#9860](https://github.com/rust-lang/rust-clippy/pull/9860) +* Clippy will now avoid Cargo's cache, if `Cargo.toml` or `clippy.toml` have changed + [#9707](https://github.com/rust-lang/rust-clippy/pull/9707) +* [`uninlined_format_args`]: Added a new config `allow-mixed-uninlined-format-args` to allow the + lint, if only some arguments can be inlined + [#9865](https://github.com/rust-lang/rust-clippy/pull/9865) +* [`needless_lifetimes`]: Now provides suggests for individual lifetimes + [#9743](https://github.com/rust-lang/rust-clippy/pull/9743) +* [`needless_collect`]: Now detects needless `is_empty` and `contains` calls + [#8744](https://github.com/rust-lang/rust-clippy/pull/8744) +* [`blanket_clippy_restriction_lints`]: Now lints, if `clippy::restriction` is enabled via the + command line arguments + [#9755](https://github.com/rust-lang/rust-clippy/pull/9755) +* [`mutable_key_type`]: Now has the `ignore-interior-mutability` configuration, to add types which + should be ignored by the lint + [#9692](https://github.com/rust-lang/rust-clippy/pull/9692) +* [`uninlined_format_args`]: Now works for multiline `format!` expressions + [#9945](https://github.com/rust-lang/rust-clippy/pull/9945) +* [`cognitive_complexity`]: Now works for async functions + [#9828](https://github.com/rust-lang/rust-clippy/pull/9828) + [#9836](https://github.com/rust-lang/rust-clippy/pull/9836) +* [`vec_box`]: Now avoids an off-by-one error when using the `vec-box-size-threshold` configuration + [#9848](https://github.com/rust-lang/rust-clippy/pull/9848) +* [`never_loop`]: Now correctly handles breaks in nested labeled blocks + [#9858](https://github.com/rust-lang/rust-clippy/pull/9858) + [#9837](https://github.com/rust-lang/rust-clippy/pull/9837) +* [`disallowed_methods`], [`disallowed_types`], [`disallowed_macros`]: Now correctly resolve + paths, if a crate is used multiple times with different versions + [#9800](https://github.com/rust-lang/rust-clippy/pull/9800) +* [`disallowed_methods`]: Can now be used for local methods + [#9800](https://github.com/rust-lang/rust-clippy/pull/9800) +* [`print_stdout`], [`print_stderr`]: Can now be enabled in test with the `allow-print-in-tests` + config value + [#9797](https://github.com/rust-lang/rust-clippy/pull/9797) +* [`from_raw_with_void_ptr`]: Now works for `Rc`, `Arc`, `alloc::rc::Weak` and + `alloc::sync::Weak` types. + [#9700](https://github.com/rust-lang/rust-clippy/pull/9700) +* [`needless_borrowed_reference`]: Now works for struct and tuple patterns with wildcards + [#9855](https://github.com/rust-lang/rust-clippy/pull/9855) +* [`or_fun_call`]: Now supports `map_or` methods + [#9689](https://github.com/rust-lang/rust-clippy/pull/9689) +* [`unwrap_used`], [`expect_used`]: No longer lints in test code + [#9686](https://github.com/rust-lang/rust-clippy/pull/9686) +* [`fn_params_excessive_bools`]: Is now emitted with the lint level at the linted function + [#9698](https://github.com/rust-lang/rust-clippy/pull/9698) + +### False Positive Fixes + +* [`new_ret_no_self`]: No longer lints when `impl Trait<Self>` is returned + [#9733](https://github.com/rust-lang/rust-clippy/pull/9733) +* [`unnecessary_lazy_evaluations`]: No longer lints, if the type has a significant drop + [#9750](https://github.com/rust-lang/rust-clippy/pull/9750) +* [`option_if_let_else`]: No longer lints, if any arm has guard + [#9747](https://github.com/rust-lang/rust-clippy/pull/9747) +* [`explicit_auto_deref`]: No longer lints, if the target type is a projection with generic + arguments + [#9813](https://github.com/rust-lang/rust-clippy/pull/9813) +* [`unnecessary_to_owned`]: No longer lints, if the suggestion effects types + [#9796](https://github.com/rust-lang/rust-clippy/pull/9796) +* [`needless_borrow`]: No longer lints, if the suggestion is affected by `Deref` + [#9674](https://github.com/rust-lang/rust-clippy/pull/9674) +* [`unused_unit`]: No longer lints, if lifetimes are bound to the return type + [#9849](https://github.com/rust-lang/rust-clippy/pull/9849) +* [`mut_mut`]: No longer lints cases with unsized mutable references + [#9835](https://github.com/rust-lang/rust-clippy/pull/9835) +* [`bool_to_int_with_if`]: No longer lints in const context + [#9738](https://github.com/rust-lang/rust-clippy/pull/9738) +* [`use_self`]: No longer lints in macros + [#9704](https://github.com/rust-lang/rust-clippy/pull/9704) +* [`unnecessary_operation`]: No longer lints, if multiple macros are involved + [#9981](https://github.com/rust-lang/rust-clippy/pull/9981) +* [`allow_attributes_without_reason`]: No longer lints inside external macros + [#9630](https://github.com/rust-lang/rust-clippy/pull/9630) +* [`question_mark`]: No longer lints for `if let Err()` with an `else` branch + [#9722](https://github.com/rust-lang/rust-clippy/pull/9722) +* [`unnecessary_cast`]: No longer lints if the identifier and cast originate from different macros + [#9980](https://github.com/rust-lang/rust-clippy/pull/9980) +* [`arithmetic_side_effects`]: Now detects operations with associated constants + [#9592](https://github.com/rust-lang/rust-clippy/pull/9592) +* [`explicit_auto_deref`]: No longer lints, if the initial value is not a reference or reference + receiver + [#9997](https://github.com/rust-lang/rust-clippy/pull/9997) +* [`module_name_repetitions`], [`single_component_path_imports`]: Now handle `#[allow]` + attributes correctly + [#9879](https://github.com/rust-lang/rust-clippy/pull/9879) +* [`bool_to_int_with_if`]: No longer lints `if let` statements + [#9714](https://github.com/rust-lang/rust-clippy/pull/9714) +* [`needless_borrow`]: No longer lints, `if`-`else`-statements that require the borrow + [#9791](https://github.com/rust-lang/rust-clippy/pull/9791) +* [`needless_borrow`]: No longer lints borrows, if moves were illegal + [#9711](https://github.com/rust-lang/rust-clippy/pull/9711) +* [`manual_swap`]: No longer lints in const context + [#9871](https://github.com/rust-lang/rust-clippy/pull/9871) + +### Suggestion Fixes/Improvements + +* [`missing_safety_doc`], [`missing_errors_doc`], [`missing_panics_doc`]: No longer show the + entire item in the lint emission. + [#9772](https://github.com/rust-lang/rust-clippy/pull/9772) +* [`needless_lifetimes`]: Only suggests `'_` when it's applicable + [#9743](https://github.com/rust-lang/rust-clippy/pull/9743) +* [`use_self`]: Now suggests full paths correctly + [#9726](https://github.com/rust-lang/rust-clippy/pull/9726) +* [`redundant_closure_call`]: Now correctly deals with macros during suggestion creation + [#9987](https://github.com/rust-lang/rust-clippy/pull/9987) +* [`unnecessary_cast`]: Suggestions now correctly deal with references + [#9996](https://github.com/rust-lang/rust-clippy/pull/9996) +* [`unnecessary_join`]: Suggestions now correctly use [turbofish] operators + [#9779](https://github.com/rust-lang/rust-clippy/pull/9779) +* [`equatable_if_let`]: Can now suggest `matches!` replacements + [#9368](https://github.com/rust-lang/rust-clippy/pull/9368) +* [`string_extend_chars`]: Suggestions now correctly work for `str` slices + [#9741](https://github.com/rust-lang/rust-clippy/pull/9741) +* [`redundant_closure_for_method_calls`]: Suggestions now include angle brackets and generic + arguments if needed + [#9745](https://github.com/rust-lang/rust-clippy/pull/9745) +* [`manual_let_else`]: Suggestions no longer expand macro calls + [#9943](https://github.com/rust-lang/rust-clippy/pull/9943) +* [`infallible_destructuring_match`]: Suggestions now preserve references + [#9850](https://github.com/rust-lang/rust-clippy/pull/9850) +* [`result_large_err`]: The error now shows the largest enum variant + [#9662](https://github.com/rust-lang/rust-clippy/pull/9662) +* [`needless_return`]: Suggestions are now formatted better + [#9967](https://github.com/rust-lang/rust-clippy/pull/9967) +* [`unused_rounding`]: The suggestion now preserves the original float literal notation + [#9870](https://github.com/rust-lang/rust-clippy/pull/9870) + +[turbofish]: https://turbo.fish/::%3CClippy%3E + +### ICE Fixes + +* [`result_large_err`]: Fixed ICE for empty enums + [#10007](https://github.com/rust-lang/rust-clippy/pull/10007) +* [`redundant_allocation`]: Fixed ICE for types with bounded variables + [#9773](https://github.com/rust-lang/rust-clippy/pull/9773) +* [`unused_rounding`]: Fixed ICE, if `_` was used as a separator + [#10001](https://github.com/rust-lang/rust-clippy/pull/10001) ## Rust 1.66 -Current stable, released 2022-12-15 +Released 2022-12-15 [b52fb523...4f142aa1](https://github.com/rust-lang/rust-clippy/compare/b52fb523...4f142aa1) @@ -166,6 +359,7 @@ Current stable, released 2022-12-15 * [`unnecessary_to_owned`]: Avoid ICEs in favor of false negatives if information is missing [#9505](https://github.com/rust-lang/rust-clippy/pull/9505) + [#10027](https://github.com/rust-lang/rust-clippy/pull/10027) * [`manual_range_contains`]: No longer ICEs on values behind references [#9627](https://github.com/rust-lang/rust-clippy/pull/9627) * [`needless_pass_by_value`]: No longer ICEs on unsized `dyn Fn` arguments @@ -4189,6 +4383,7 @@ Released 2018-09-13 [`extend_from_slice`]: https://rust-lang.github.io/rust-clippy/master/index.html#extend_from_slice [`extend_with_drain`]: https://rust-lang.github.io/rust-clippy/master/index.html#extend_with_drain [`extra_unused_lifetimes`]: https://rust-lang.github.io/rust-clippy/master/index.html#extra_unused_lifetimes +[`extra_unused_type_parameters`]: https://rust-lang.github.io/rust-clippy/master/index.html#extra_unused_type_parameters [`fallible_impl_from`]: https://rust-lang.github.io/rust-clippy/master/index.html#fallible_impl_from [`field_reassign_with_default`]: https://rust-lang.github.io/rust-clippy/master/index.html#field_reassign_with_default [`filetype_is_file`]: https://rust-lang.github.io/rust-clippy/master/index.html#filetype_is_file @@ -4235,6 +4430,7 @@ Released 2018-09-13 [`if_same_then_else`]: https://rust-lang.github.io/rust-clippy/master/index.html#if_same_then_else [`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 +[`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 [`implicit_return`]: https://rust-lang.github.io/rust-clippy/master/index.html#implicit_return @@ -4299,6 +4495,7 @@ Released 2018-09-13 [`let_underscore_future`]: https://rust-lang.github.io/rust-clippy/master/index.html#let_underscore_future [`let_underscore_lock`]: https://rust-lang.github.io/rust-clippy/master/index.html#let_underscore_lock [`let_underscore_must_use`]: https://rust-lang.github.io/rust-clippy/master/index.html#let_underscore_must_use +[`let_underscore_untyped`]: https://rust-lang.github.io/rust-clippy/master/index.html#let_underscore_untyped [`let_unit_value`]: https://rust-lang.github.io/rust-clippy/master/index.html#let_unit_value [`linkedlist`]: https://rust-lang.github.io/rust-clippy/master/index.html#linkedlist [`logic_bug`]: https://rust-lang.github.io/rust-clippy/master/index.html#logic_bug @@ -4383,6 +4580,7 @@ Released 2018-09-13 [`multi_assignments`]: https://rust-lang.github.io/rust-clippy/master/index.html#multi_assignments [`multiple_crate_versions`]: https://rust-lang.github.io/rust-clippy/master/index.html#multiple_crate_versions [`multiple_inherent_impl`]: https://rust-lang.github.io/rust-clippy/master/index.html#multiple_inherent_impl +[`multiple_unsafe_ops_per_block`]: https://rust-lang.github.io/rust-clippy/master/index.html#multiple_unsafe_ops_per_block [`must_use_candidate`]: https://rust-lang.github.io/rust-clippy/master/index.html#must_use_candidate [`must_use_unit`]: https://rust-lang.github.io/rust-clippy/master/index.html#must_use_unit [`mut_from_ref`]: https://rust-lang.github.io/rust-clippy/master/index.html#mut_from_ref @@ -4424,6 +4622,7 @@ Released 2018-09-13 [`no_effect`]: https://rust-lang.github.io/rust-clippy/master/index.html#no_effect [`no_effect_replace`]: https://rust-lang.github.io/rust-clippy/master/index.html#no_effect_replace [`no_effect_underscore_binding`]: https://rust-lang.github.io/rust-clippy/master/index.html#no_effect_underscore_binding +[`no_mangle_with_rust_abi`]: https://rust-lang.github.io/rust-clippy/master/index.html#no_mangle_with_rust_abi [`non_ascii_literal`]: https://rust-lang.github.io/rust-clippy/master/index.html#non_ascii_literal [`non_octal_unix_permissions`]: https://rust-lang.github.io/rust-clippy/master/index.html#non_octal_unix_permissions [`non_send_fields_in_send_ty`]: https://rust-lang.github.io/rust-clippy/master/index.html#non_send_fields_in_send_ty @@ -4479,6 +4678,7 @@ Released 2018-09-13 [`pub_enum_variant_names`]: https://rust-lang.github.io/rust-clippy/master/index.html#pub_enum_variant_names [`pub_use`]: https://rust-lang.github.io/rust-clippy/master/index.html#pub_use [`question_mark`]: https://rust-lang.github.io/rust-clippy/master/index.html#question_mark +[`question_mark_used`]: https://rust-lang.github.io/rust-clippy/master/index.html#question_mark_used [`range_minus_one`]: https://rust-lang.github.io/rust-clippy/master/index.html#range_minus_one [`range_plus_one`]: https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one [`range_step_by_zero`]: https://rust-lang.github.io/rust-clippy/master/index.html#range_step_by_zero @@ -4538,6 +4738,7 @@ Released 2018-09-13 [`should_assert_eq`]: https://rust-lang.github.io/rust-clippy/master/index.html#should_assert_eq [`should_implement_trait`]: https://rust-lang.github.io/rust-clippy/master/index.html#should_implement_trait [`significant_drop_in_scrutinee`]: https://rust-lang.github.io/rust-clippy/master/index.html#significant_drop_in_scrutinee +[`significant_drop_tightening`]: https://rust-lang.github.io/rust-clippy/master/index.html#significant_drop_tightening [`similar_names`]: https://rust-lang.github.io/rust-clippy/master/index.html#similar_names [`single_char_add_str`]: https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str [`single_char_lifetime_names`]: https://rust-lang.github.io/rust-clippy/master/index.html#single_char_lifetime_names @@ -4568,6 +4769,7 @@ Released 2018-09-13 [`suboptimal_flops`]: https://rust-lang.github.io/rust-clippy/master/index.html#suboptimal_flops [`suspicious_arithmetic_impl`]: https://rust-lang.github.io/rust-clippy/master/index.html#suspicious_arithmetic_impl [`suspicious_assignment_formatting`]: https://rust-lang.github.io/rust-clippy/master/index.html#suspicious_assignment_formatting +[`suspicious_command_arg_space`]: https://rust-lang.github.io/rust-clippy/master/index.html#suspicious_command_arg_space [`suspicious_else_formatting`]: https://rust-lang.github.io/rust-clippy/master/index.html#suspicious_else_formatting [`suspicious_map`]: https://rust-lang.github.io/rust-clippy/master/index.html#suspicious_map [`suspicious_op_assign_impl`]: https://rust-lang.github.io/rust-clippy/master/index.html#suspicious_op_assign_impl @@ -4594,6 +4796,7 @@ Released 2018-09-13 [`transmute_int_to_bool`]: https://rust-lang.github.io/rust-clippy/master/index.html#transmute_int_to_bool [`transmute_int_to_char`]: https://rust-lang.github.io/rust-clippy/master/index.html#transmute_int_to_char [`transmute_int_to_float`]: https://rust-lang.github.io/rust-clippy/master/index.html#transmute_int_to_float +[`transmute_int_to_non_zero`]: https://rust-lang.github.io/rust-clippy/master/index.html#transmute_int_to_non_zero [`transmute_null_to_fn`]: https://rust-lang.github.io/rust-clippy/master/index.html#transmute_null_to_fn [`transmute_num_to_bytes`]: https://rust-lang.github.io/rust-clippy/master/index.html#transmute_num_to_bytes [`transmute_ptr_to_ptr`]: https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr diff --git a/src/tools/clippy/Cargo.toml b/src/tools/clippy/Cargo.toml index f8cb4b721..70d126809 100644 --- a/src/tools/clippy/Cargo.toml +++ b/src/tools/clippy/Cargo.toml @@ -1,6 +1,6 @@ [package] name = "clippy" -version = "0.1.68" +version = "0.1.69" description = "A bunch of helpful lints to avoid common pitfalls in Rust" repository = "https://github.com/rust-lang/rust-clippy" readme = "README.md" @@ -42,6 +42,7 @@ filetime = "0.2" rustc-workspace-hack = "1.0" # UI test dependencies +clap = { version = "4.1.4", features = ["derive"] } clippy_utils = { path = "clippy_utils" } derive-new = "0.5" if_chain = "1.0" diff --git a/src/tools/clippy/README.md b/src/tools/clippy/README.md index 81254ba8b..3e7379ace 100644 --- a/src/tools/clippy/README.md +++ b/src/tools/clippy/README.md @@ -5,7 +5,7 @@ A collection of lints to catch common mistakes and improve your [Rust](https://github.com/rust-lang/rust) code. -[There are over 550 lints included in this crate!](https://rust-lang.github.io/rust-clippy/master/index.html) +[There are over 600 lints included in this crate!](https://rust-lang.github.io/rust-clippy/master/index.html) Lints are divided into categories, each with a default [lint level](https://doc.rust-lang.org/rustc/lints/levels.html). You can choose how much Clippy is supposed to ~~annoy~~ help you by changing the lint level by category. @@ -19,21 +19,35 @@ You can choose how much Clippy is supposed to ~~annoy~~ help you by changing the | `clippy::complexity` | code that does something simple but in a complex way | **warn** | | `clippy::perf` | code that can be written to run faster | **warn** | | `clippy::pedantic` | lints which are rather strict or have occasional false positives | allow | +| `clippy::restriction` | lints which prevent the use of language and library features[^restrict] | allow | | `clippy::nursery` | new lints that are still under development | allow | | `clippy::cargo` | lints for the cargo manifest | allow | More to come, please [file an issue](https://github.com/rust-lang/rust-clippy/issues) if you have ideas! -The [lint list](https://rust-lang.github.io/rust-clippy/master/index.html) also contains "restriction lints", which are -for things which are usually not considered "bad", but may be useful to turn on in specific cases. These should be used -very selectively, if at all. +The `restriction` category should, *emphatically*, not be enabled as a whole. The contained +lints may lint against perfectly reasonable code, may not have an alternative suggestion, +and may contradict any other lints (including other categories). Lints should be considered +on a case-by-case basis before enabling. + +[^restrict]: Some use cases for `restriction` lints include: + - Strict coding styles (e.g. [`clippy::else_if_without_else`]). + - Additional restrictions on CI (e.g. [`clippy::todo`]). + - Preventing panicking in certain functions (e.g. [`clippy::unwrap_used`]). + - Running a lint only on a subset of code (e.g. `#[forbid(clippy::float_arithmetic)]` on a module). + +[`clippy::else_if_without_else`]: https://rust-lang.github.io/rust-clippy/master/index.html#else_if_without_else +[`clippy::todo`]: https://rust-lang.github.io/rust-clippy/master/index.html#todo +[`clippy::unwrap_used`]: https://rust-lang.github.io/rust-clippy/master/index.html#unwrap_used + +--- Table of contents: -* [Usage instructions](#usage) -* [Configuration](#configuration) -* [Contributing](#contributing) -* [License](#license) +* [Usage instructions](#usage) +* [Configuration](#configuration) +* [Contributing](#contributing) +* [License](#license) ## Usage @@ -64,6 +78,7 @@ Once you have rustup and the latest stable release (at least Rust 1.29) installe ```terminal rustup component add clippy ``` + If it says that it can't find the `clippy` component, please run `rustup self update`. #### Step 3: Run Clippy @@ -143,16 +158,16 @@ line. (You can swap `clippy::all` with the specific lint category you are target You can add options to your code to `allow`/`warn`/`deny` Clippy lints: -* the whole set of `Warn` lints using the `clippy` lint group (`#![deny(clippy::all)]`). +* the whole set of `Warn` lints using the `clippy` lint group (`#![deny(clippy::all)]`). Note that `rustc` has additional [lint groups](https://doc.rust-lang.org/rustc/lints/groups.html). -* all lints using both the `clippy` and `clippy::pedantic` lint groups (`#![deny(clippy::all)]`, +* all lints using both the `clippy` and `clippy::pedantic` lint groups (`#![deny(clippy::all)]`, `#![deny(clippy::pedantic)]`). Note that `clippy::pedantic` contains some very aggressive lints prone to false positives. -* only some lints (`#![deny(clippy::single_match, clippy::box_vec)]`, etc.) +* only some lints (`#![deny(clippy::single_match, clippy::box_vec)]`, etc.) -* `allow`/`warn`/`deny` can be limited to a single function or module using `#[allow(...)]`, etc. +* `allow`/`warn`/`deny` can be limited to a single function or module using `#[allow(...)]`, etc. Note: `allow` means to suppress the lint for your code. With `warn` the lint will only emit a warning, while with `deny` the lint will emit an error, when @@ -176,12 +191,14 @@ cargo clippy -- -W clippy::lint_name This also works with lint groups. For example, you can run Clippy with warnings for all lints enabled: + ```terminal cargo clippy -- -W clippy::pedantic ``` If you care only about a single lint, you can allow all others and then explicitly warn on the lint(s) you are interested in: + ```terminal cargo clippy -- -A clippy::all -W clippy::useless_format -W clippy::... ``` @@ -194,11 +211,21 @@ value` mapping e.g. ```toml avoid-breaking-exported-api = false disallowed-names = ["toto", "tata", "titi"] -cognitive-complexity-threshold = 30 ``` -See the [list of configurable lints](https://rust-lang.github.io/rust-clippy/master/index.html#Configuration), -the lint descriptions contain the names and meanings of these configuration variables. +The [table of configurations](https://doc.rust-lang.org/nightly/clippy/lint_configuration.html) +contains all config values, their default, and a list of lints they affect. +Each [configurable lint](https://rust-lang.github.io/rust-clippy/master/index.html#Configuration) +, also contains information about these values. + +For configurations that are a list type with default values such as +[disallowed-names](https://rust-lang.github.io/rust-clippy/master/index.html#disallowed_names), +you can use the unique value `".."` to extend the default values instead of replacing them. + +```toml +# default of disallowed-names is ["foo", "baz", "quux"] +disallowed-names = ["bar", ".."] # -> ["bar", "foo", "baz", "quux"] +``` > **Note** > diff --git a/src/tools/clippy/book/src/README.md b/src/tools/clippy/book/src/README.md index 23867df8e..df4a1f270 100644 --- a/src/tools/clippy/book/src/README.md +++ b/src/tools/clippy/book/src/README.md @@ -6,7 +6,7 @@ A collection of lints to catch common mistakes and improve your [Rust](https://github.com/rust-lang/rust) code. -[There are over 550 lints included in this crate!](https://rust-lang.github.io/rust-clippy/master/index.html) +[There are over 600 lints included in this crate!](https://rust-lang.github.io/rust-clippy/master/index.html) Lints are divided into categories, each with a default [lint level](https://doc.rust-lang.org/rustc/lints/levels.html). You can choose how diff --git a/src/tools/clippy/book/src/SUMMARY.md b/src/tools/clippy/book/src/SUMMARY.md index 1f0b8db28..0649f7a63 100644 --- a/src/tools/clippy/book/src/SUMMARY.md +++ b/src/tools/clippy/book/src/SUMMARY.md @@ -5,6 +5,7 @@ - [Installation](installation.md) - [Usage](usage.md) - [Configuration](configuration.md) + - [Lint Configuration](lint_configuration.md) - [Clippy's Lints](lints.md) - [Continuous Integration](continuous_integration/README.md) - [GitHub Actions](continuous_integration/github_actions.md) diff --git a/src/tools/clippy/book/src/configuration.md b/src/tools/clippy/book/src/configuration.md index 430ff8b73..87f4a697a 100644 --- a/src/tools/clippy/book/src/configuration.md +++ b/src/tools/clippy/book/src/configuration.md @@ -8,11 +8,21 @@ basic `variable = value` mapping eg. ```toml avoid-breaking-exported-api = false disallowed-names = ["toto", "tata", "titi"] -cognitive-complexity-threshold = 30 ``` -See the [list of configurable lints](https://rust-lang.github.io/rust-clippy/master/index.html#Configuration), -the lint descriptions contain the names and meanings of these configuration variables. +The [table of configurations](./lint_configuration.md) +contains all config values, their default, and a list of lints they affect. +Each [configurable lint](https://rust-lang.github.io/rust-clippy/master/index.html#Configuration) +, also contains information about these values. + +For configurations that are a list type with default values such as +[disallowed-names](https://rust-lang.github.io/rust-clippy/master/index.html#disallowed_names), +you can use the unique value `".."` to extend the default values instead of replacing them. + +```toml +# default of disallowed-names is ["foo", "baz", "quux"] +disallowed-names = ["bar", ".."] # -> ["bar", "foo", "baz", "quux"] +``` To deactivate the "for further information visit *lint-link*" message you can define the `CLIPPY_DISABLE_DOCS_LINKS` environment variable. diff --git a/src/tools/clippy/book/src/development/adding_lints.md b/src/tools/clippy/book/src/development/adding_lints.md index 8b4eee8c9..f57dc627d 100644 --- a/src/tools/clippy/book/src/development/adding_lints.md +++ b/src/tools/clippy/book/src/development/adding_lints.md @@ -146,7 +146,8 @@ For cargo lints, the process of testing differs in that we are interested in the manifest. If our new lint is named e.g. `foo_categories`, after running `cargo dev -new_lint` we will find by default two new crates, each with its manifest file: +new_lint --name=foo_categories --type=cargo --category=cargo` we will find by +default two new crates, each with its manifest file: * `tests/ui-cargo/foo_categories/fail/Cargo.toml`: this file should cause the new lint to raise an error. @@ -699,6 +700,10 @@ for some users. Adding a configuration is done in the following steps: `clippy.toml` file with the configuration value and a rust file that should be linted by Clippy. The test can otherwise be written as usual. +5. Update [Lint Configuration](../lint_configuration.md) + + 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_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 diff --git a/src/tools/clippy/book/src/development/infrastructure/backport.md b/src/tools/clippy/book/src/development/infrastructure/backport.md index 15f3d1f08..6920c4e46 100644 --- a/src/tools/clippy/book/src/development/infrastructure/backport.md +++ b/src/tools/clippy/book/src/development/infrastructure/backport.md @@ -28,6 +28,7 @@ repository. You can do this with: ```bash # Assuming the current directory corresponds to the Rust repository $ git checkout beta +# Make sure to change `your-github-name` to your github name in the following command $ git subtree pull -p src/tools/clippy https://github.com/<your-github-name>/rust-clippy backport $ ./x.py test src/tools/clippy ``` diff --git a/src/tools/clippy/book/src/development/infrastructure/book.md b/src/tools/clippy/book/src/development/infrastructure/book.md index a48742191..dbd624ecd 100644 --- a/src/tools/clippy/book/src/development/infrastructure/book.md +++ b/src/tools/clippy/book/src/development/infrastructure/book.md @@ -3,15 +3,15 @@ This document explains how to make additions and changes to the Clippy book, the guide to Clippy that you're reading right now. The Clippy book is formatted with [Markdown](https://www.markdownguide.org) and generated by -[mdbook](https://github.com/rust-lang/mdBook). +[mdBook](https://github.com/rust-lang/mdBook). -- [Get mdbook](#get-mdbook) +- [Get mdBook](#get-mdbook) - [Make changes](#make-changes) -## Get mdbook +## Get mdBook While not strictly necessary since the book source is simply Markdown text -files, having mdbook locally will allow you to build, test and serve the book +files, having mdBook locally will allow you to build, test and serve the book locally to view changes before you commit them to the repository. You likely already have `cargo` installed, so the easiest option is to simply: @@ -19,7 +19,7 @@ already have `cargo` installed, so the easiest option is to simply: cargo install mdbook ``` -See the mdbook [installation](https://github.com/rust-lang/mdBook#installation) +See the mdBook [installation](https://github.com/rust-lang/mdBook#installation) instructions for other options. ## Make changes @@ -27,7 +27,7 @@ instructions for other options. The book's [src](https://github.com/rust-lang/rust-clippy/tree/master/book/src) directory contains all of the markdown files used to generate the book. If you -want to see your changes in real time, you can use the mdbook `serve` command to +want to see your changes in real time, you can use the mdBook `serve` command to run a web server locally that will automatically update changes as they are made. From the top level of your `rust-clippy` directory: @@ -38,5 +38,5 @@ mdbook serve book --open Then navigate to `http://localhost:3000` to see the generated book. While the server is running, changes you make will automatically be updated. -For more information, see the mdbook +For more information, see the mdBook [guide](https://rust-lang.github.io/mdBook/). diff --git a/src/tools/clippy/book/src/development/infrastructure/changelog_update.md b/src/tools/clippy/book/src/development/infrastructure/changelog_update.md index 80a47affe..d1ac7237b 100644 --- a/src/tools/clippy/book/src/development/infrastructure/changelog_update.md +++ b/src/tools/clippy/book/src/development/infrastructure/changelog_update.md @@ -95,11 +95,23 @@ As section headers, we use: Please also be sure to update the Beta/Unreleased sections at the top with the relevant commit ranges. -If you have the time, it would be appreciated if you double-check, that the -`#[clippy::version]` attributes for the added lints contains the correct version. +#### 3.1 Include `beta-accepted` PRs + +Look for the [`beta-accepted`] label and make sure to also include the PRs with +that label in the changelog. If you can, remove the `beta-accepted` labels +**after** the changelog PR was merged. + +> _Note:_ Some of those PRs might even got backported to the previous `beta`. +> Those have to be included in the changelog of the _previous_ release. + +### 4. Update `clippy::version` attributes + +Next, make sure to check that the `#[clippy::version]` attributes for the added +lints contain the correct version. [changelog]: https://github.com/rust-lang/rust-clippy/blob/master/CHANGELOG.md [forge]: https://forge.rust-lang.org/ [rust_master_tools]: https://github.com/rust-lang/rust/tree/master/src/tools/clippy [rust_beta_tools]: https://github.com/rust-lang/rust/tree/beta/src/tools/clippy [rust_stable_tools]: https://github.com/rust-lang/rust/releases +[`beta-accepted`]: https://github.com/rust-lang/rust-clippy/issues?q=label%3Abeta-accepted+ diff --git a/src/tools/clippy/book/src/development/infrastructure/sync.md b/src/tools/clippy/book/src/development/infrastructure/sync.md index 5a0f7409a..02cfc11b5 100644 --- a/src/tools/clippy/book/src/development/infrastructure/sync.md +++ b/src/tools/clippy/book/src/development/infrastructure/sync.md @@ -79,8 +79,7 @@ to be run inside the `rust` directory): `rustup check`. 3. Sync the changes to the rust-copy of Clippy to your Clippy fork: ```bash - # Make sure to change `your-github-name` to your github name in the following command. Also be - # sure to either use a net-new branch, e.g. `sync-from-rust`, or delete the branch beforehand + # Be sure to either use a net-new branch, e.g. `sync-from-rust`, or delete the branch beforehand # because changes cannot be fast forwarded and you have to run this command again. git subtree push -P src/tools/clippy clippy-local sync-from-rust ``` diff --git a/src/tools/clippy/book/src/lint_configuration.md b/src/tools/clippy/book/src/lint_configuration.md new file mode 100644 index 000000000..995dd2f04 --- /dev/null +++ b/src/tools/clippy/book/src/lint_configuration.md @@ -0,0 +1,553 @@ +<!-- +This file is generated by `cargo collect-metadata`. +Please use that command to update the file and do not edit it by hand. +--> + +## Lint Configuration Options +| <div style="width:290px">Option</div> | Default Value | +|--|--| +| [arithmetic-side-effects-allowed](#arithmetic-side-effects-allowed) | `{}` | +| [arithmetic-side-effects-allowed-binary](#arithmetic-side-effects-allowed-binary) | `[]` | +| [arithmetic-side-effects-allowed-unary](#arithmetic-side-effects-allowed-unary) | `{}` | +| [avoid-breaking-exported-api](#avoid-breaking-exported-api) | `true` | +| [msrv](#msrv) | `None` | +| [cognitive-complexity-threshold](#cognitive-complexity-threshold) | `25` | +| [disallowed-names](#disallowed-names) | `["foo", "baz", "quux"]` | +| [doc-valid-idents](#doc-valid-idents) | `["KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "DirectX", "ECMAScript", "GPLv2", "GPLv3", "GitHub", "GitLab", "IPv4", "IPv6", "ClojureScript", "CoffeeScript", "JavaScript", "PureScript", "TypeScript", "NaN", "NaNs", "OAuth", "GraphQL", "OCaml", "OpenGL", "OpenMP", "OpenSSH", "OpenSSL", "OpenStreetMap", "OpenDNS", "WebGL", "TensorFlow", "TrueType", "iOS", "macOS", "FreeBSD", "TeX", "LaTeX", "BibTeX", "BibLaTeX", "MinGW", "CamelCase"]` | +| [too-many-arguments-threshold](#too-many-arguments-threshold) | `7` | +| [type-complexity-threshold](#type-complexity-threshold) | `250` | +| [single-char-binding-names-threshold](#single-char-binding-names-threshold) | `4` | +| [too-large-for-stack](#too-large-for-stack) | `200` | +| [enum-variant-name-threshold](#enum-variant-name-threshold) | `3` | +| [enum-variant-size-threshold](#enum-variant-size-threshold) | `200` | +| [verbose-bit-mask-threshold](#verbose-bit-mask-threshold) | `1` | +| [literal-representation-threshold](#literal-representation-threshold) | `16384` | +| [trivial-copy-size-limit](#trivial-copy-size-limit) | `None` | +| [pass-by-value-size-limit](#pass-by-value-size-limit) | `256` | +| [too-many-lines-threshold](#too-many-lines-threshold) | `100` | +| [array-size-threshold](#array-size-threshold) | `512000` | +| [vec-box-size-threshold](#vec-box-size-threshold) | `4096` | +| [max-trait-bounds](#max-trait-bounds) | `3` | +| [max-struct-bools](#max-struct-bools) | `3` | +| [max-fn-params-bools](#max-fn-params-bools) | `3` | +| [warn-on-all-wildcard-imports](#warn-on-all-wildcard-imports) | `false` | +| [disallowed-macros](#disallowed-macros) | `[]` | +| [disallowed-methods](#disallowed-methods) | `[]` | +| [disallowed-types](#disallowed-types) | `[]` | +| [unreadable-literal-lint-fractions](#unreadable-literal-lint-fractions) | `true` | +| [upper-case-acronyms-aggressive](#upper-case-acronyms-aggressive) | `false` | +| [matches-for-let-else](#matches-for-let-else) | `WellKnownTypes` | +| [cargo-ignore-publish](#cargo-ignore-publish) | `false` | +| [standard-macro-braces](#standard-macro-braces) | `[]` | +| [enforced-import-renames](#enforced-import-renames) | `[]` | +| [allowed-scripts](#allowed-scripts) | `["Latin"]` | +| [enable-raw-pointer-heuristic-for-send](#enable-raw-pointer-heuristic-for-send) | `true` | +| [max-suggested-slice-pattern-length](#max-suggested-slice-pattern-length) | `3` | +| [await-holding-invalid-types](#await-holding-invalid-types) | `[]` | +| [max-include-file-size](#max-include-file-size) | `1000000` | +| [allow-expect-in-tests](#allow-expect-in-tests) | `false` | +| [allow-unwrap-in-tests](#allow-unwrap-in-tests) | `false` | +| [allow-dbg-in-tests](#allow-dbg-in-tests) | `false` | +| [allow-print-in-tests](#allow-print-in-tests) | `false` | +| [large-error-threshold](#large-error-threshold) | `128` | +| [ignore-interior-mutability](#ignore-interior-mutability) | `["bytes::Bytes"]` | +| [allow-mixed-uninlined-format-args](#allow-mixed-uninlined-format-args) | `true` | +| [suppress-restriction-lint-in-const](#suppress-restriction-lint-in-const) | `false` | +| [missing-docs-in-crate-items](#missing-docs-in-crate-items) | `false` | + +### arithmetic-side-effects-allowed +Suppress checking of the passed type names in all types of operations. + +If a specific operation is desired, consider using `arithmetic_side_effects_allowed_binary` or `arithmetic_side_effects_allowed_unary` instead. + +#### Example + +```toml +arithmetic-side-effects-allowed = ["SomeType", "AnotherType"] +``` + +#### Noteworthy + +A type, say `SomeType`, listed in this configuration has the same behavior of +`["SomeType" , "*"], ["*", "SomeType"]` in `arithmetic_side_effects_allowed_binary`. + +**Default Value:** `{}` (`rustc_data_structures::fx::FxHashSet<String>`) + +* [arithmetic_side_effects](https://rust-lang.github.io/rust-clippy/master/index.html#arithmetic_side_effects) + + +### arithmetic-side-effects-allowed-binary +Suppress checking of the passed type pair names in binary operations like addition or +multiplication. + +Supports the "*" wildcard to indicate that a certain type won't trigger the lint regardless +of the involved counterpart. For example, `["SomeType", "*"]` or `["*", "AnotherType"]`. + +Pairs are asymmetric, which means that `["SomeType", "AnotherType"]` is not the same as +`["AnotherType", "SomeType"]`. + +#### Example + +```toml +arithmetic-side-effects-allowed-binary = [["SomeType" , "f32"], ["AnotherType", "*"]] +``` + +**Default Value:** `[]` (`Vec<[String; 2]>`) + +* [arithmetic_side_effects](https://rust-lang.github.io/rust-clippy/master/index.html#arithmetic_side_effects) + + +### arithmetic-side-effects-allowed-unary +Suppress checking of the passed type names in unary operations like "negation" (`-`). + +#### Example + +```toml +arithmetic-side-effects-allowed-unary = ["SomeType", "AnotherType"] +``` + +**Default Value:** `{}` (`rustc_data_structures::fx::FxHashSet<String>`) + +* [arithmetic_side_effects](https://rust-lang.github.io/rust-clippy/master/index.html#arithmetic_side_effects) + + +### avoid-breaking-exported-api +Suppress lints whenever the suggested change would cause breakage for other crates. + +**Default Value:** `true` (`bool`) + +* [enum_variant_names](https://rust-lang.github.io/rust-clippy/master/index.html#enum_variant_names) +* [large_types_passed_by_value](https://rust-lang.github.io/rust-clippy/master/index.html#large_types_passed_by_value) +* [trivially_copy_pass_by_ref](https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref) +* [unnecessary_wraps](https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_wraps) +* [unused_self](https://rust-lang.github.io/rust-clippy/master/index.html#unused_self) +* [upper_case_acronyms](https://rust-lang.github.io/rust-clippy/master/index.html#upper_case_acronyms) +* [wrong_self_convention](https://rust-lang.github.io/rust-clippy/master/index.html#wrong_self_convention) +* [box_collection](https://rust-lang.github.io/rust-clippy/master/index.html#box_collection) +* [redundant_allocation](https://rust-lang.github.io/rust-clippy/master/index.html#redundant_allocation) +* [rc_buffer](https://rust-lang.github.io/rust-clippy/master/index.html#rc_buffer) +* [vec_box](https://rust-lang.github.io/rust-clippy/master/index.html#vec_box) +* [option_option](https://rust-lang.github.io/rust-clippy/master/index.html#option_option) +* [linkedlist](https://rust-lang.github.io/rust-clippy/master/index.html#linkedlist) +* [rc_mutex](https://rust-lang.github.io/rust-clippy/master/index.html#rc_mutex) + + +### msrv +The minimum rust version that the project supports + +**Default Value:** `None` (`Option<String>`) + +* [manual_split_once](https://rust-lang.github.io/rust-clippy/master/index.html#manual_split_once) +* [manual_str_repeat](https://rust-lang.github.io/rust-clippy/master/index.html#manual_str_repeat) +* [cloned_instead_of_copied](https://rust-lang.github.io/rust-clippy/master/index.html#cloned_instead_of_copied) +* [redundant_field_names](https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names) +* [redundant_static_lifetimes](https://rust-lang.github.io/rust-clippy/master/index.html#redundant_static_lifetimes) +* [filter_map_next](https://rust-lang.github.io/rust-clippy/master/index.html#filter_map_next) +* [checked_conversions](https://rust-lang.github.io/rust-clippy/master/index.html#checked_conversions) +* [manual_range_contains](https://rust-lang.github.io/rust-clippy/master/index.html#manual_range_contains) +* [use_self](https://rust-lang.github.io/rust-clippy/master/index.html#use_self) +* [mem_replace_with_default](https://rust-lang.github.io/rust-clippy/master/index.html#mem_replace_with_default) +* [manual_non_exhaustive](https://rust-lang.github.io/rust-clippy/master/index.html#manual_non_exhaustive) +* [option_as_ref_deref](https://rust-lang.github.io/rust-clippy/master/index.html#option_as_ref_deref) +* [map_unwrap_or](https://rust-lang.github.io/rust-clippy/master/index.html#map_unwrap_or) +* [match_like_matches_macro](https://rust-lang.github.io/rust-clippy/master/index.html#match_like_matches_macro) +* [manual_strip](https://rust-lang.github.io/rust-clippy/master/index.html#manual_strip) +* [missing_const_for_fn](https://rust-lang.github.io/rust-clippy/master/index.html#missing_const_for_fn) +* [unnested_or_patterns](https://rust-lang.github.io/rust-clippy/master/index.html#unnested_or_patterns) +* [from_over_into](https://rust-lang.github.io/rust-clippy/master/index.html#from_over_into) +* [ptr_as_ptr](https://rust-lang.github.io/rust-clippy/master/index.html#ptr_as_ptr) +* [if_then_some_else_none](https://rust-lang.github.io/rust-clippy/master/index.html#if_then_some_else_none) +* [approx_constant](https://rust-lang.github.io/rust-clippy/master/index.html#approx_constant) +* [deprecated_cfg_attr](https://rust-lang.github.io/rust-clippy/master/index.html#deprecated_cfg_attr) +* [index_refutable_slice](https://rust-lang.github.io/rust-clippy/master/index.html#index_refutable_slice) +* [map_clone](https://rust-lang.github.io/rust-clippy/master/index.html#map_clone) +* [borrow_as_ptr](https://rust-lang.github.io/rust-clippy/master/index.html#borrow_as_ptr) +* [manual_bits](https://rust-lang.github.io/rust-clippy/master/index.html#manual_bits) +* [err_expect](https://rust-lang.github.io/rust-clippy/master/index.html#err_expect) +* [cast_abs_to_unsigned](https://rust-lang.github.io/rust-clippy/master/index.html#cast_abs_to_unsigned) +* [uninlined_format_args](https://rust-lang.github.io/rust-clippy/master/index.html#uninlined_format_args) +* [manual_clamp](https://rust-lang.github.io/rust-clippy/master/index.html#manual_clamp) +* [manual_let_else](https://rust-lang.github.io/rust-clippy/master/index.html#manual_let_else) +* [unchecked_duration_subtraction](https://rust-lang.github.io/rust-clippy/master/index.html#unchecked_duration_subtraction) +* [collapsible_str_replace](https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_str_replace) +* [seek_from_current](https://rust-lang.github.io/rust-clippy/master/index.html#seek_from_current) +* [seek_rewind](https://rust-lang.github.io/rust-clippy/master/index.html#seek_rewind) +* [unnecessary_lazy_evaluations](https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_lazy_evaluations) +* [transmute_ptr_to_ref](https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ref) +* [almost_complete_range](https://rust-lang.github.io/rust-clippy/master/index.html#almost_complete_range) +* [needless_borrow](https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow) +* [derivable_impls](https://rust-lang.github.io/rust-clippy/master/index.html#derivable_impls) +* [manual_is_ascii_check](https://rust-lang.github.io/rust-clippy/master/index.html#manual_is_ascii_check) +* [manual_rem_euclid](https://rust-lang.github.io/rust-clippy/master/index.html#manual_rem_euclid) +* [manual_retain](https://rust-lang.github.io/rust-clippy/master/index.html#manual_retain) + + +### cognitive-complexity-threshold +The maximum cognitive complexity a function can have + +**Default Value:** `25` (`u64`) + +* [cognitive_complexity](https://rust-lang.github.io/rust-clippy/master/index.html#cognitive_complexity) + + +### disallowed-names +The list of disallowed names to lint about. NB: `bar` is not here since it has legitimate uses. The value +`".."` can be used as part of the list to indicate, that the configured values should be appended to the +default configuration of Clippy. By default any configuration will replace the default value. + +**Default Value:** `["foo", "baz", "quux"]` (`Vec<String>`) + +* [disallowed_names](https://rust-lang.github.io/rust-clippy/master/index.html#disallowed_names) + + +### doc-valid-idents +The list of words this lint should not consider as identifiers needing ticks. The value +`".."` can be used as part of the list to indicate, that the configured values should be appended to the +default configuration of Clippy. By default any configuraction will replace the default value. For example: +* `doc-valid-idents = ["ClipPy"]` would replace the default list with `["ClipPy"]`. +* `doc-valid-idents = ["ClipPy", ".."]` would append `ClipPy` to the default list. + +Default list: + +**Default Value:** `["KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "DirectX", "ECMAScript", "GPLv2", "GPLv3", "GitHub", "GitLab", "IPv4", "IPv6", "ClojureScript", "CoffeeScript", "JavaScript", "PureScript", "TypeScript", "NaN", "NaNs", "OAuth", "GraphQL", "OCaml", "OpenGL", "OpenMP", "OpenSSH", "OpenSSL", "OpenStreetMap", "OpenDNS", "WebGL", "TensorFlow", "TrueType", "iOS", "macOS", "FreeBSD", "TeX", "LaTeX", "BibTeX", "BibLaTeX", "MinGW", "CamelCase"]` (`Vec<String>`) + +* [doc_markdown](https://rust-lang.github.io/rust-clippy/master/index.html#doc_markdown) + + +### too-many-arguments-threshold +The maximum number of argument a function or method can have + +**Default Value:** `7` (`u64`) + +* [too_many_arguments](https://rust-lang.github.io/rust-clippy/master/index.html#too_many_arguments) + + +### type-complexity-threshold +The maximum complexity a type can have + +**Default Value:** `250` (`u64`) + +* [type_complexity](https://rust-lang.github.io/rust-clippy/master/index.html#type_complexity) + + +### single-char-binding-names-threshold +The maximum number of single char bindings a scope may have + +**Default Value:** `4` (`u64`) + +* [many_single_char_names](https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names) + + +### too-large-for-stack +The maximum size of objects (in bytes) that will be linted. Larger objects are ok on the heap + +**Default Value:** `200` (`u64`) + +* [boxed_local](https://rust-lang.github.io/rust-clippy/master/index.html#boxed_local) +* [useless_vec](https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec) + + +### enum-variant-name-threshold +The minimum number of enum variants for the lints about variant names to trigger + +**Default Value:** `3` (`u64`) + +* [enum_variant_names](https://rust-lang.github.io/rust-clippy/master/index.html#enum_variant_names) + + +### enum-variant-size-threshold +The maximum size of an enum's variant to avoid box suggestion + +**Default Value:** `200` (`u64`) + +* [large_enum_variant](https://rust-lang.github.io/rust-clippy/master/index.html#large_enum_variant) + + +### verbose-bit-mask-threshold +The maximum allowed size of a bit mask before suggesting to use 'trailing_zeros' + +**Default Value:** `1` (`u64`) + +* [verbose_bit_mask](https://rust-lang.github.io/rust-clippy/master/index.html#verbose_bit_mask) + + +### literal-representation-threshold +The lower bound for linting decimal literals + +**Default Value:** `16384` (`u64`) + +* [decimal_literal_representation](https://rust-lang.github.io/rust-clippy/master/index.html#decimal_literal_representation) + + +### trivial-copy-size-limit +The maximum size (in bytes) to consider a `Copy` type for passing by value instead of by reference. + +**Default Value:** `None` (`Option<u64>`) + +* [trivially_copy_pass_by_ref](https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref) + + +### pass-by-value-size-limit +The minimum size (in bytes) to consider a type for passing by reference instead of by value. + +**Default Value:** `256` (`u64`) + +* [large_types_passed_by_value](https://rust-lang.github.io/rust-clippy/master/index.html#large_types_passed_by_value) + + +### too-many-lines-threshold +The maximum number of lines a function or method can have + +**Default Value:** `100` (`u64`) + +* [too_many_lines](https://rust-lang.github.io/rust-clippy/master/index.html#too_many_lines) + + +### array-size-threshold +The maximum allowed size for arrays on the stack + +**Default Value:** `512000` (`u64`) + +* [large_stack_arrays](https://rust-lang.github.io/rust-clippy/master/index.html#large_stack_arrays) +* [large_const_arrays](https://rust-lang.github.io/rust-clippy/master/index.html#large_const_arrays) + + +### vec-box-size-threshold +The size of the boxed type in bytes, where boxing in a `Vec` is allowed + +**Default Value:** `4096` (`u64`) + +* [vec_box](https://rust-lang.github.io/rust-clippy/master/index.html#vec_box) + + +### max-trait-bounds +The maximum number of bounds a trait can have to be linted + +**Default Value:** `3` (`u64`) + +* [type_repetition_in_bounds](https://rust-lang.github.io/rust-clippy/master/index.html#type_repetition_in_bounds) + + +### max-struct-bools +The maximum number of bool fields a struct can have + +**Default Value:** `3` (`u64`) + +* [struct_excessive_bools](https://rust-lang.github.io/rust-clippy/master/index.html#struct_excessive_bools) + + +### max-fn-params-bools +The maximum number of bool parameters a function can have + +**Default Value:** `3` (`u64`) + +* [fn_params_excessive_bools](https://rust-lang.github.io/rust-clippy/master/index.html#fn_params_excessive_bools) + + +### warn-on-all-wildcard-imports +Whether to allow certain wildcard imports (prelude, super in tests). + +**Default Value:** `false` (`bool`) + +* [wildcard_imports](https://rust-lang.github.io/rust-clippy/master/index.html#wildcard_imports) + + +### disallowed-macros +The list of disallowed macros, written as fully qualified paths. + +**Default Value:** `[]` (`Vec<crate::utils::conf::DisallowedPath>`) + +* [disallowed_macros](https://rust-lang.github.io/rust-clippy/master/index.html#disallowed_macros) + + +### disallowed-methods +The list of disallowed methods, written as fully qualified paths. + +**Default Value:** `[]` (`Vec<crate::utils::conf::DisallowedPath>`) + +* [disallowed_methods](https://rust-lang.github.io/rust-clippy/master/index.html#disallowed_methods) + + +### disallowed-types +The list of disallowed types, written as fully qualified paths. + +**Default Value:** `[]` (`Vec<crate::utils::conf::DisallowedPath>`) + +* [disallowed_types](https://rust-lang.github.io/rust-clippy/master/index.html#disallowed_types) + + +### unreadable-literal-lint-fractions +Should the fraction of a decimal be linted to include separators. + +**Default Value:** `true` (`bool`) + +* [unreadable_literal](https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal) + + +### upper-case-acronyms-aggressive +Enables verbose mode. Triggers if there is more than one uppercase char next to each other + +**Default Value:** `false` (`bool`) + +* [upper_case_acronyms](https://rust-lang.github.io/rust-clippy/master/index.html#upper_case_acronyms) + + +### matches-for-let-else +Whether the matches should be considered by the lint, and whether there should +be filtering for common types. + +**Default Value:** `WellKnownTypes` (`crate::manual_let_else::MatchLintBehaviour`) + +* [manual_let_else](https://rust-lang.github.io/rust-clippy/master/index.html#manual_let_else) + + +### cargo-ignore-publish +For internal testing only, ignores the current `publish` settings in the Cargo manifest. + +**Default Value:** `false` (`bool`) + +* [_cargo_common_metadata](https://rust-lang.github.io/rust-clippy/master/index.html#_cargo_common_metadata) + + +### standard-macro-braces +Enforce the named macros always use the braces specified. + +A `MacroMatcher` can be added like so `{ name = "macro_name", brace = "(" }`. If the macro +is could be used with a full path two `MacroMatcher`s have to be added one with the full path +`crate_name::macro_name` and one with just the macro name. + +**Default Value:** `[]` (`Vec<crate::nonstandard_macro_braces::MacroMatcher>`) + +* [nonstandard_macro_braces](https://rust-lang.github.io/rust-clippy/master/index.html#nonstandard_macro_braces) + + +### enforced-import-renames +The list of imports to always rename, a fully qualified path followed by the rename. + +**Default Value:** `[]` (`Vec<crate::utils::conf::Rename>`) + +* [missing_enforced_import_renames](https://rust-lang.github.io/rust-clippy/master/index.html#missing_enforced_import_renames) + + +### allowed-scripts +The list of unicode scripts allowed to be used in the scope. + +**Default Value:** `["Latin"]` (`Vec<String>`) + +* [disallowed_script_idents](https://rust-lang.github.io/rust-clippy/master/index.html#disallowed_script_idents) + + +### enable-raw-pointer-heuristic-for-send +Whether to apply the raw pointer heuristic to determine if a type is `Send`. + +**Default Value:** `true` (`bool`) + +* [non_send_fields_in_send_ty](https://rust-lang.github.io/rust-clippy/master/index.html#non_send_fields_in_send_ty) + + +### max-suggested-slice-pattern-length +When Clippy suggests using a slice pattern, this is the maximum number of elements allowed in +the slice pattern that is suggested. If more elements would be necessary, the lint is suppressed. +For example, `[_, _, _, e, ..]` is a slice pattern with 4 elements. + +**Default Value:** `3` (`u64`) + +* [index_refutable_slice](https://rust-lang.github.io/rust-clippy/master/index.html#index_refutable_slice) + + +### await-holding-invalid-types + + +**Default Value:** `[]` (`Vec<crate::utils::conf::DisallowedPath>`) + +* [await_holding_invalid_type](https://rust-lang.github.io/rust-clippy/master/index.html#await_holding_invalid_type) + + +### max-include-file-size +The maximum size of a file included via `include_bytes!()` or `include_str!()`, in bytes + +**Default Value:** `1000000` (`u64`) + +* [large_include_file](https://rust-lang.github.io/rust-clippy/master/index.html#large_include_file) + + +### allow-expect-in-tests +Whether `expect` should be allowed in test functions or `#[cfg(test)]` + +**Default Value:** `false` (`bool`) + +* [expect_used](https://rust-lang.github.io/rust-clippy/master/index.html#expect_used) + + +### allow-unwrap-in-tests +Whether `unwrap` should be allowed in test functions or `#[cfg(test)]` + +**Default Value:** `false` (`bool`) + +* [unwrap_used](https://rust-lang.github.io/rust-clippy/master/index.html#unwrap_used) + + +### allow-dbg-in-tests +Whether `dbg!` should be allowed in test functions or `#[cfg(test)]` + +**Default Value:** `false` (`bool`) + +* [dbg_macro](https://rust-lang.github.io/rust-clippy/master/index.html#dbg_macro) + + +### allow-print-in-tests +Whether print macros (ex. `println!`) should be allowed in test functions or `#[cfg(test)]` + +**Default Value:** `false` (`bool`) + +* [print_stdout](https://rust-lang.github.io/rust-clippy/master/index.html#print_stdout) +* [print_stderr](https://rust-lang.github.io/rust-clippy/master/index.html#print_stderr) + + +### large-error-threshold +The maximum size of the `Err`-variant in a `Result` returned from a function + +**Default Value:** `128` (`u64`) + +* [result_large_err](https://rust-lang.github.io/rust-clippy/master/index.html#result_large_err) + + +### ignore-interior-mutability +A list of paths to types that should be treated like `Arc`, i.e. ignored but +for the generic parameters for determining interior mutability + +**Default Value:** `["bytes::Bytes"]` (`Vec<String>`) + +* [mutable_key_type](https://rust-lang.github.io/rust-clippy/master/index.html#mutable_key_type) + + +### allow-mixed-uninlined-format-args +Whether to allow mixed uninlined format args, e.g. `format!("{} {}", a, foo.bar)` + +**Default Value:** `true` (`bool`) + +* [uninlined_format_args](https://rust-lang.github.io/rust-clippy/master/index.html#uninlined_format_args) + + +### suppress-restriction-lint-in-const +Whether to suppress a restriction lint in constant code. In same +cases the restructured operation might not be unavoidable, as the +suggested counterparts are unavailable in constant code. This +configuration will cause restriction lints to trigger even +if no suggestion can be made. + +**Default Value:** `false` (`bool`) + +* [indexing_slicing](https://rust-lang.github.io/rust-clippy/master/index.html#indexing_slicing) + + +### missing-docs-in-crate-items +Whether to **only** check for missing documentation in items visible within the current +crate. For example, `pub(crate)` items. + +**Default Value:** `false` (`bool`) + +* [missing_docs_in_private_items](https://rust-lang.github.io/rust-clippy/master/index.html#missing_docs_in_private_items) + + + diff --git a/src/tools/clippy/clippy_dev/Cargo.toml b/src/tools/clippy/clippy_dev/Cargo.toml index 510c7e852..c3f8a782d 100644 --- a/src/tools/clippy/clippy_dev/Cargo.toml +++ b/src/tools/clippy/clippy_dev/Cargo.toml @@ -5,7 +5,7 @@ edition = "2021" [dependencies] aho-corasick = "0.7" -clap = "3.2" +clap = "4.1.4" indoc = "1.0" itertools = "0.10.1" opener = "0.5" diff --git a/src/tools/clippy/clippy_dev/src/main.rs b/src/tools/clippy/clippy_dev/src/main.rs index d3e036692..e2457e5a8 100644 --- a/src/tools/clippy/clippy_dev/src/main.rs +++ b/src/tools/clippy/clippy_dev/src/main.rs @@ -2,7 +2,7 @@ // warn on lints, that are included in `rust-lang/rust`s bootstrap #![warn(rust_2018_idioms, unused_lifetimes)] -use clap::{Arg, ArgAction, ArgMatches, Command, PossibleValue}; +use clap::{Arg, ArgAction, ArgMatches, Command}; use clippy_dev::{bless, dogfood, fmt, lint, new_lint, serve, setup, update_lints}; use indoc::indoc; @@ -11,22 +11,22 @@ fn main() { match matches.subcommand() { Some(("bless", matches)) => { - bless::bless(matches.contains_id("ignore-timestamp")); + bless::bless(matches.get_flag("ignore-timestamp")); }, Some(("dogfood", matches)) => { dogfood::dogfood( - matches.contains_id("fix"), - matches.contains_id("allow-dirty"), - matches.contains_id("allow-staged"), + matches.get_flag("fix"), + matches.get_flag("allow-dirty"), + matches.get_flag("allow-staged"), ); }, Some(("fmt", matches)) => { - fmt::run(matches.contains_id("check"), matches.contains_id("verbose")); + fmt::run(matches.get_flag("check"), matches.get_flag("verbose")); }, Some(("update_lints", matches)) => { - if matches.contains_id("print-only") { + if matches.get_flag("print-only") { update_lints::print_lints(); - } else if matches.contains_id("check") { + } else if matches.get_flag("check") { update_lints::update(update_lints::UpdateMode::Check); } else { update_lints::update(update_lints::UpdateMode::Change); @@ -38,7 +38,7 @@ fn main() { matches.get_one::<String>("name"), matches.get_one::<String>("category").map(String::as_str), matches.get_one::<String>("type").map(String::as_str), - matches.contains_id("msrv"), + matches.get_flag("msrv"), ) { Ok(_) => update_lints::update(update_lints::UpdateMode::Change), Err(e) => eprintln!("Unable to create lint: {e}"), @@ -46,7 +46,7 @@ fn main() { }, Some(("setup", sub_command)) => match sub_command.subcommand() { Some(("intellij", matches)) => { - if matches.contains_id("remove") { + if matches.get_flag("remove") { setup::intellij::remove_rustc_src(); } else { setup::intellij::setup_rustc_src( @@ -57,17 +57,17 @@ fn main() { } }, Some(("git-hook", matches)) => { - if matches.contains_id("remove") { + if matches.get_flag("remove") { setup::git_hook::remove_hook(); } else { - setup::git_hook::install_hook(matches.contains_id("force-override")); + setup::git_hook::install_hook(matches.get_flag("force-override")); } }, Some(("vscode-tasks", matches)) => { - if matches.contains_id("remove") { + if matches.get_flag("remove") { setup::vscode::remove_tasks(); } else { - setup::vscode::install_tasks(matches.contains_id("force-override")); + setup::vscode::install_tasks(matches.get_flag("force-override")); } }, _ => {}, @@ -91,7 +91,7 @@ fn main() { Some(("rename_lint", matches)) => { let old_name = matches.get_one::<String>("old_name").unwrap(); let new_name = matches.get_one::<String>("new_name").unwrap_or(old_name); - let uplift = matches.contains_id("uplift"); + let uplift = matches.get_flag("uplift"); update_lints::rename(old_name, new_name, uplift); }, Some(("deprecate", matches)) => { @@ -110,24 +110,37 @@ fn get_clap_config() -> ArgMatches { Command::new("bless").about("bless the test output changes").arg( Arg::new("ignore-timestamp") .long("ignore-timestamp") + .action(ArgAction::SetTrue) .help("Include files updated before clippy was built"), ), Command::new("dogfood").about("Runs the dogfood test").args([ - Arg::new("fix").long("fix").help("Apply the suggestions when possible"), + Arg::new("fix") + .long("fix") + .action(ArgAction::SetTrue) + .help("Apply the suggestions when possible"), Arg::new("allow-dirty") .long("allow-dirty") + .action(ArgAction::SetTrue) .help("Fix code even if the working directory has changes") .requires("fix"), Arg::new("allow-staged") .long("allow-staged") + .action(ArgAction::SetTrue) .help("Fix code even if the working directory has staged changes") .requires("fix"), ]), Command::new("fmt") .about("Run rustfmt on all projects and tests") .args([ - Arg::new("check").long("check").help("Use the rustfmt --check option"), - Arg::new("verbose").short('v').long("verbose").help("Echo commands run"), + Arg::new("check") + .long("check") + .action(ArgAction::SetTrue) + .help("Use the rustfmt --check option"), + Arg::new("verbose") + .short('v') + .long("verbose") + .action(ArgAction::SetTrue) + .help("Echo commands run"), ]), Command::new("update_lints") .about("Updates lint registration and information from the source code") @@ -140,13 +153,17 @@ fn get_clap_config() -> ArgMatches { * all lints are registered in the lint store", ) .args([ - Arg::new("print-only").long("print-only").help( - "Print a table of lints to STDOUT. \ - This does not include deprecated and internal lints. \ - (Does not modify any files)", - ), + Arg::new("print-only") + .long("print-only") + .action(ArgAction::SetTrue) + .help( + "Print a table of lints to STDOUT. \ + This does not include deprecated and internal lints. \ + (Does not modify any files)", + ), Arg::new("check") .long("check") + .action(ArgAction::SetTrue) .help("Checks that `cargo dev update_lints` has been run. Used on CI."), ]), Command::new("new_lint") @@ -156,15 +173,13 @@ fn get_clap_config() -> ArgMatches { .short('p') .long("pass") .help("Specify whether the lint runs during the early or late pass") - .takes_value(true) - .value_parser([PossibleValue::new("early"), PossibleValue::new("late")]) + .value_parser(["early", "late"]) .conflicts_with("type") .required_unless_present("type"), Arg::new("name") .short('n') .long("name") .help("Name of the new lint in snake case, ex: fn_too_long") - .takes_value(true) .required(true), Arg::new("category") .short('c') @@ -172,25 +187,23 @@ fn get_clap_config() -> ArgMatches { .help("What category the lint belongs to") .default_value("nursery") .value_parser([ - PossibleValue::new("style"), - PossibleValue::new("correctness"), - PossibleValue::new("suspicious"), - PossibleValue::new("complexity"), - PossibleValue::new("perf"), - PossibleValue::new("pedantic"), - PossibleValue::new("restriction"), - PossibleValue::new("cargo"), - PossibleValue::new("nursery"), - PossibleValue::new("internal"), - PossibleValue::new("internal_warn"), - ]) - .takes_value(true), - Arg::new("type") - .long("type") - .help("What directory the lint belongs in") - .takes_value(true) - .required(false), - Arg::new("msrv").long("msrv").help("Add MSRV config code to the lint"), + "style", + "correctness", + "suspicious", + "complexity", + "perf", + "pedantic", + "restriction", + "cargo", + "nursery", + "internal", + "internal_warn", + ]), + Arg::new("type").long("type").help("What directory the lint belongs in"), + Arg::new("msrv") + .long("msrv") + .action(ArgAction::SetTrue) + .help("Add MSRV config code to the lint"), ]), Command::new("setup") .about("Support for setting up your personal development environment") @@ -201,13 +214,12 @@ fn get_clap_config() -> ArgMatches { .args([ Arg::new("remove") .long("remove") - .help("Remove the dependencies added with 'cargo dev setup intellij'") - .required(false), + .action(ArgAction::SetTrue) + .help("Remove the dependencies added with 'cargo dev setup intellij'"), Arg::new("rustc-repo-path") .long("repo-path") .short('r') .help("The path to a rustc repo that will be used for setting the dependencies") - .takes_value(true) .value_name("path") .conflicts_with("remove") .required(true), @@ -217,26 +229,26 @@ fn get_clap_config() -> ArgMatches { .args([ Arg::new("remove") .long("remove") - .help("Remove the pre-commit hook added with 'cargo dev setup git-hook'") - .required(false), + .action(ArgAction::SetTrue) + .help("Remove the pre-commit hook added with 'cargo dev setup git-hook'"), Arg::new("force-override") .long("force-override") .short('f') - .help("Forces the override of an existing git pre-commit hook") - .required(false), + .action(ArgAction::SetTrue) + .help("Forces the override of an existing git pre-commit hook"), ]), Command::new("vscode-tasks") .about("Add several tasks to vscode for formatting, validation and testing") .args([ Arg::new("remove") .long("remove") - .help("Remove the tasks added with 'cargo dev setup vscode-tasks'") - .required(false), + .action(ArgAction::SetTrue) + .help("Remove the tasks added with 'cargo dev setup vscode-tasks'"), Arg::new("force-override") .long("force-override") .short('f') - .help("Forces the override of existing vscode tasks") - .required(false), + .action(ArgAction::SetTrue) + .help("Forces the override of existing vscode tasks"), ]), ]), Command::new("remove") @@ -295,6 +307,7 @@ fn get_clap_config() -> ArgMatches { .help("The new name of the lint"), Arg::new("uplift") .long("uplift") + .action(ArgAction::SetTrue) .help("This lint will be uplifted into rustc"), ]), Command::new("deprecate").about("Deprecates the given lint").args([ @@ -305,8 +318,6 @@ fn get_clap_config() -> ArgMatches { Arg::new("reason") .long("reason") .short('r') - .required(false) - .takes_value(true) .help("The reason for deprecation"), ]), ]) diff --git a/src/tools/clippy/clippy_dev/src/new_lint.rs b/src/tools/clippy/clippy_dev/src/new_lint.rs index ec7f1dd0d..420214d92 100644 --- a/src/tools/clippy/clippy_dev/src/new_lint.rs +++ b/src/tools/clippy/clippy_dev/src/new_lint.rs @@ -1,5 +1,6 @@ use crate::clippy_project_root; use indoc::{formatdoc, writedoc}; +use std::fmt; use std::fmt::Write as _; use std::fs::{self, OpenOptions}; use std::io::prelude::*; @@ -256,7 +257,7 @@ fn get_lint_file_contents(lint: &LintData<'_>, enable_msrv: bool) -> String { ) }); - let _ = write!(result, "{}", get_lint_declaration(&name_upper, category)); + let _: fmt::Result = write!(result, "{}", get_lint_declaration(&name_upper, category)); result.push_str(&if enable_msrv { formatdoc!( @@ -353,7 +354,7 @@ fn create_lint_for_ty(lint: &LintData<'_>, enable_msrv: bool, ty: &str) -> io::R let mut lint_file_contents = String::new(); if enable_msrv { - let _ = writedoc!( + let _: fmt::Result = writedoc!( lint_file_contents, r#" use clippy_utils::msrvs::{{self, Msrv}}; @@ -373,7 +374,7 @@ fn create_lint_for_ty(lint: &LintData<'_>, enable_msrv: bool, ty: &str) -> io::R name_upper = name_upper, ); } else { - let _ = writedoc!( + let _: fmt::Result = writedoc!( lint_file_contents, r#" use rustc_lint::{{{context_import}, LintContext}}; @@ -521,7 +522,7 @@ fn setup_mod_file(path: &Path, lint: &LintData<'_>) -> io::Result<&'static str> .chain(std::iter::once(&*lint_name_upper)) .filter(|s| !s.is_empty()) { - let _ = write!(new_arr_content, "\n {ident},"); + let _: fmt::Result = write!(new_arr_content, "\n {ident},"); } new_arr_content.push('\n'); diff --git a/src/tools/clippy/clippy_dev/src/update_lints.rs b/src/tools/clippy/clippy_dev/src/update_lints.rs index 837618c92..779e4d0e1 100644 --- a/src/tools/clippy/clippy_dev/src/update_lints.rs +++ b/src/tools/clippy/clippy_dev/src/update_lints.rs @@ -5,7 +5,7 @@ use itertools::Itertools; use rustc_lexer::{tokenize, unescape, LiteralKind, TokenKind}; use std::collections::{HashMap, HashSet}; use std::ffi::OsStr; -use std::fmt::Write; +use std::fmt::{self, Write}; use std::fs::{self, OpenOptions}; use std::io::{self, Read, Seek, SeekFrom, Write as _}; use std::ops::Range; @@ -691,7 +691,7 @@ fn gen_deprecated(lints: &[DeprecatedLint]) -> String { let mut output = GENERATED_FILE_COMMENT.to_string(); output.push_str("{\n"); for lint in lints { - let _ = write!( + let _: fmt::Result = write!( output, concat!( " store.register_removed(\n", @@ -726,7 +726,7 @@ fn gen_declared_lints<'a>( if !is_public { output.push_str(" #[cfg(feature = \"internal\")]\n"); } - let _ = writeln!(output, " crate::{module_name}::{lint_name}_INFO,"); + let _: fmt::Result = writeln!(output, " crate::{module_name}::{lint_name}_INFO,"); } output.push_str("];\n"); diff --git a/src/tools/clippy/clippy_lints/Cargo.toml b/src/tools/clippy/clippy_lints/Cargo.toml index a9f69b1ba..796f1ff16 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 = "0.1.68" +version = "0.1.69" description = "A bunch of helpful lints to avoid common pitfalls in Rust" repository = "https://github.com/rust-lang/rust-clippy" readme = "README.md" @@ -9,7 +9,7 @@ keywords = ["clippy", "lint", "plugin"] edition = "2021" [dependencies] -cargo_metadata = "0.14" +cargo_metadata = "0.15.3" clippy_utils = { path = "../clippy_utils" } declare_clippy_lint = { path = "../declare_clippy_lint" } if_chain = "1.0" 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 82d368bb8..1d9096ea6 100644 --- a/src/tools/clippy/clippy_lints/src/bool_assert_comparison.rs +++ b/src/tools/clippy/clippy_lints/src/bool_assert_comparison.rs @@ -1,10 +1,12 @@ +use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::macros::{find_assert_eq_args, root_macro_call_first_node}; -use clippy_utils::{diagnostics::span_lint_and_sugg, ty::implements_trait}; +use clippy_utils::sugg::Sugg; +use clippy_utils::ty::{implements_trait, is_copy}; use rustc_ast::ast::LitKind; use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind, Lit}; -use rustc_lint::{LateContext, LateLintPass}; -use rustc_middle::ty; +use rustc_lint::{LateContext, LateLintPass, LintContext}; +use rustc_middle::ty::{self, Ty}; use rustc_session::{declare_lint_pass, declare_tool_lint}; use rustc_span::symbol::Ident; @@ -33,19 +35,19 @@ declare_clippy_lint! { declare_lint_pass!(BoolAssertComparison => [BOOL_ASSERT_COMPARISON]); -fn is_bool_lit(e: &Expr<'_>) -> bool { - matches!( - e.kind, - ExprKind::Lit(Lit { - node: LitKind::Bool(_), - .. - }) - ) && !e.span.from_expansion() +fn extract_bool_lit(e: &Expr<'_>) -> Option<bool> { + if let ExprKind::Lit(Lit { + node: LitKind::Bool(b), .. + }) = e.kind + && !e.span.from_expansion() + { + Some(b) + } else { + None + } } -fn is_impl_not_trait_with_bool_out(cx: &LateContext<'_>, e: &Expr<'_>) -> bool { - let ty = cx.typeck_results().expr_ty(e); - +fn is_impl_not_trait_with_bool_out<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>) -> bool { cx.tcx .lang_items() .not_trait() @@ -70,38 +72,70 @@ impl<'tcx> LateLintPass<'tcx> for BoolAssertComparison { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) { let Some(macro_call) = root_macro_call_first_node(cx, expr) else { return }; let macro_name = cx.tcx.item_name(macro_call.def_id); - if !matches!( - macro_name.as_str(), - "assert_eq" | "debug_assert_eq" | "assert_ne" | "debug_assert_ne" - ) { - return; - } + let eq_macro = match macro_name.as_str() { + "assert_eq" | "debug_assert_eq" => true, + "assert_ne" | "debug_assert_ne" => false, + _ => return, + }; let Some ((a, b, _)) = find_assert_eq_args(cx, expr, macro_call.expn) else { return }; - if !(is_bool_lit(a) ^ is_bool_lit(b)) { + + let a_span = a.span.source_callsite(); + let b_span = b.span.source_callsite(); + + let (lit_span, bool_value, non_lit_expr) = match (extract_bool_lit(a), extract_bool_lit(b)) { + // assert_eq!(true/false, b) + // ^^^^^^^^^^^^ + (Some(bool_value), None) => (a_span.until(b_span), bool_value, b), + // assert_eq!(a, true/false) + // ^^^^^^^^^^^^ + (None, Some(bool_value)) => (b_span.with_lo(a_span.hi()), bool_value, a), // If there are two boolean arguments, we definitely don't understand // what's going on, so better leave things as is... // // Or there is simply no boolean and then we can leave things as is! - return; - } + _ => return, + }; + + let non_lit_ty = cx.typeck_results().expr_ty(non_lit_expr); - if !is_impl_not_trait_with_bool_out(cx, a) || !is_impl_not_trait_with_bool_out(cx, b) { + if !is_impl_not_trait_with_bool_out(cx, non_lit_ty) { // At this point the expression which is not a boolean // literal does not implement Not trait with a bool output, // so we cannot suggest to rewrite our code return; } + if !is_copy(cx, non_lit_ty) { + // Only lint with types that are `Copy` because `assert!(x)` takes + // ownership of `x` whereas `assert_eq(x, true)` does not + return; + } + let macro_name = macro_name.as_str(); let non_eq_mac = ¯o_name[..macro_name.len() - 3]; - span_lint_and_sugg( + span_lint_and_then( cx, BOOL_ASSERT_COMPARISON, macro_call.span, &format!("used `{macro_name}!` with a literal bool"), - "replace it with", - format!("{non_eq_mac}!(..)"), - Applicability::MaybeIncorrect, + |diag| { + // assert_eq!(...) + // ^^^^^^^^^ + let name_span = cx.sess().source_map().span_until_char(macro_call.span, '!'); + + let mut suggestions = vec![(name_span, non_eq_mac.to_string()), (lit_span, String::new())]; + + if bool_value ^ eq_macro { + let Some(sugg) = Sugg::hir_opt(cx, non_lit_expr) else { return }; + suggestions.push((non_lit_expr.span, (!sugg).to_string())); + } + + diag.multipart_suggestion( + format!("replace it with `{non_eq_mac}!(..)`"), + suggestions, + Applicability::MachineApplicable, + ); + }, ); } } diff --git a/src/tools/clippy/clippy_lints/src/booleans.rs b/src/tools/clippy/clippy_lints/src/booleans.rs index 939bdbcdc..e8106beec 100644 --- a/src/tools/clippy/clippy_lints/src/booleans.rs +++ b/src/tools/clippy/clippy_lints/src/booleans.rs @@ -6,9 +6,10 @@ 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, HirId, UnOp}; +use rustc_hir::{BinOpKind, Body, Expr, ExprKind, FnDecl, UnOp}; use rustc_lint::{LateContext, LateLintPass}; use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_span::def_id::LocalDefId; use rustc_span::source_map::Span; use rustc_span::sym; @@ -82,7 +83,7 @@ impl<'tcx> LateLintPass<'tcx> for NonminimalBool { _: &'tcx FnDecl<'_>, body: &'tcx Body<'_>, _: Span, - _: HirId, + _: LocalDefId, ) { NonminimalBoolVisitor { cx }.visit_body(body); } diff --git a/src/tools/clippy/clippy_lints/src/box_default.rs b/src/tools/clippy/clippy_lints/src/box_default.rs index 9d98a6bab..dfa949d1a 100644 --- a/src/tools/clippy/clippy_lints/src/box_default.rs +++ b/src/tools/clippy/clippy_lints/src/box_default.rs @@ -117,7 +117,8 @@ fn given_type(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool { ) => { if let Some(index) = args.iter().position(|arg| arg.hir_id == expr.hir_id) && let Some(sig) = expr_sig(cx, path) && - let Some(input) = sig.input(index) + let Some(input) = sig.input(index) && + !cx.typeck_results().expr_ty_adjusted(expr).boxed_ty().is_trait() { input.no_bound_vars().is_some() } else { 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 9409f4844..1633ffd58 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 @@ -17,7 +17,7 @@ pub(super) fn check(cx: &LateContext<'_>, expr: &Expr<'_>, cast_expr: &Expr<'_>, && let ExprKind::MethodCall(method_name, receiver, [], _) = cast_expr.peel_blocks().kind && method_name.ident.name == rustc_span::sym::as_ptr && let Some(as_ptr_did) = cx.typeck_results().type_dependent_def_id(cast_expr.peel_blocks().hir_id) - && let as_ptr_sig = cx.tcx.fn_sig(as_ptr_did) + && let as_ptr_sig = cx.tcx.fn_sig(as_ptr_did).subst_identity() && let Some(first_param_ty) = as_ptr_sig.skip_binder().inputs().iter().next() && let ty::Ref(_, _, Mutability::Not) = first_param_ty.kind() && let Some(recv) = snippet_opt(cx, receiver.span) diff --git a/src/tools/clippy/clippy_lints/src/casts/cast_possible_truncation.rs b/src/tools/clippy/clippy_lints/src/casts/cast_possible_truncation.rs index a63764849..823970e35 100644 --- a/src/tools/clippy/clippy_lints/src/casts/cast_possible_truncation.rs +++ b/src/tools/clippy/clippy_lints/src/casts/cast_possible_truncation.rs @@ -1,11 +1,14 @@ use clippy_utils::consts::{constant, Constant}; -use clippy_utils::diagnostics::span_lint; +use clippy_utils::diagnostics::{span_lint, span_lint_and_then}; use clippy_utils::expr_or_init; +use clippy_utils::source::snippet; use clippy_utils::ty::{get_discriminant_value, is_isize_or_usize}; +use rustc_errors::{Applicability, SuggestionStyle}; use rustc_hir::def::{DefKind, Res}; use rustc_hir::{BinOpKind, Expr, ExprKind}; use rustc_lint::LateContext; use rustc_middle::ty::{self, FloatTy, Ty}; +use rustc_span::Span; use rustc_target::abi::IntegerType; use super::{utils, CAST_ENUM_TRUNCATION, CAST_POSSIBLE_TRUNCATION}; @@ -74,7 +77,14 @@ fn apply_reductions(cx: &LateContext<'_>, nbits: u64, expr: &Expr<'_>, signed: b } } -pub(super) fn check(cx: &LateContext<'_>, expr: &Expr<'_>, cast_expr: &Expr<'_>, cast_from: Ty<'_>, cast_to: Ty<'_>) { +pub(super) fn check( + cx: &LateContext<'_>, + expr: &Expr<'_>, + cast_expr: &Expr<'_>, + cast_from: Ty<'_>, + cast_to: Ty<'_>, + cast_to_span: Span, +) { let msg = match (cast_from.kind(), cast_to.is_integral()) { (ty::Int(_) | ty::Uint(_), true) => { let from_nbits = apply_reductions( @@ -139,7 +149,7 @@ pub(super) fn check(cx: &LateContext<'_>, expr: &Expr<'_>, cast_expr: &Expr<'_>, ); return; } - format!("casting `{cast_from}` to `{cast_to}` may truncate the value{suffix}",) + format!("casting `{cast_from}` to `{cast_to}` may truncate the value{suffix}") }, (ty::Float(_), true) => { @@ -153,5 +163,19 @@ pub(super) fn check(cx: &LateContext<'_>, expr: &Expr<'_>, cast_expr: &Expr<'_>, _ => return, }; - span_lint(cx, CAST_POSSIBLE_TRUNCATION, expr.span, &msg); + let name_of_cast_from = snippet(cx, cast_expr.span, ".."); + let cast_to_snip = snippet(cx, cast_to_span, ".."); + let suggestion = format!("{cast_to_snip}::try_from({name_of_cast_from})"); + + span_lint_and_then(cx, CAST_POSSIBLE_TRUNCATION, expr.span, &msg, |diag| { + diag.help("if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ..."); + diag.span_suggestion_with_style( + expr.span, + "... or use `try_from` and handle the error accordingly", + suggestion, + Applicability::Unspecified, + // always show the suggestion in a separate line + SuggestionStyle::ShowAlways, + ); + }); } diff --git a/src/tools/clippy/clippy_lints/src/casts/cast_ptr_alignment.rs b/src/tools/clippy/clippy_lints/src/casts/cast_ptr_alignment.rs index 97054a0d1..6c8ee296c 100644 --- a/src/tools/clippy/clippy_lints/src/casts/cast_ptr_alignment.rs +++ b/src/tools/clippy/clippy_lints/src/casts/cast_ptr_alignment.rs @@ -66,7 +66,7 @@ fn is_used_as_unaligned(cx: &LateContext<'_>, e: &Expr<'_>) -> bool { if matches!(name.ident.as_str(), "read_unaligned" | "write_unaligned") && let Some(def_id) = cx.typeck_results().type_dependent_def_id(parent.hir_id) && let Some(def_id) = cx.tcx.impl_of_method(def_id) - && cx.tcx.type_of(def_id).is_unsafe_ptr() + && cx.tcx.type_of(def_id).subst_identity().is_unsafe_ptr() { true } else { diff --git a/src/tools/clippy/clippy_lints/src/casts/mod.rs b/src/tools/clippy/clippy_lints/src/casts/mod.rs index 161e3a698..362f70d12 100644 --- a/src/tools/clippy/clippy_lints/src/casts/mod.rs +++ b/src/tools/clippy/clippy_lints/src/casts/mod.rs @@ -80,7 +80,8 @@ declare_clippy_lint! { /// ### What it does /// Checks for casts between numerical types that may /// truncate large values. This is expected behavior, so the cast is `Allow` by - /// default. + /// default. It suggests user either explicitly ignore the lint, + /// or use `try_from()` and handle the truncation, default, or panic explicitly. /// /// ### Why is this bad? /// In some problem domains, it is good practice to avoid @@ -93,6 +94,21 @@ declare_clippy_lint! { /// x as u8 /// } /// ``` + /// Use instead: + /// ``` + /// fn as_u8(x: u64) -> u8 { + /// if let Ok(x) = u8::try_from(x) { + /// x + /// } else { + /// todo!(); + /// } + /// } + /// // Or + /// #[allow(clippy::cast_possible_truncation)] + /// fn as_u16(x: u64) -> u16 { + /// x as u16 + /// } + /// ``` #[clippy::version = "pre 1.29.0"] pub CAST_POSSIBLE_TRUNCATION, pedantic, @@ -712,7 +728,7 @@ impl<'tcx> LateLintPass<'tcx> for Casts { fn_to_numeric_cast_with_truncation::check(cx, expr, cast_expr, cast_from, cast_to); if cast_to.is_numeric() && !in_external_macro(cx.sess(), expr.span) { - cast_possible_truncation::check(cx, expr, cast_expr, cast_from, cast_to); + cast_possible_truncation::check(cx, expr, cast_expr, cast_from, cast_to, cast_to_hir.span); if cast_from.is_numeric() { cast_possible_wrap::check(cx, expr, cast_from, cast_to); cast_precision_loss::check(cx, expr, cast_from, cast_to); diff --git a/src/tools/clippy/clippy_lints/src/cognitive_complexity.rs b/src/tools/clippy/clippy_lints/src/cognitive_complexity.rs index 1c3a89a97..e8531157e 100644 --- a/src/tools/clippy/clippy_lints/src/cognitive_complexity.rs +++ b/src/tools/clippy/clippy_lints/src/cognitive_complexity.rs @@ -8,9 +8,10 @@ use clippy_utils::{get_async_fn_body, is_async_fn, LimitStack}; use core::ops::ControlFlow; use rustc_ast::ast::Attribute; use rustc_hir::intravisit::FnKind; -use rustc_hir::{Body, Expr, ExprKind, FnDecl, HirId}; +use rustc_hir::{Body, Expr, ExprKind, FnDecl}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_span::def_id::LocalDefId; use rustc_span::source_map::Span; use rustc_span::{sym, BytePos}; @@ -140,9 +141,8 @@ impl<'tcx> LateLintPass<'tcx> for CognitiveComplexity { decl: &'tcx FnDecl<'_>, body: &'tcx Body<'_>, span: Span, - hir_id: HirId, + def_id: LocalDefId, ) { - let def_id = cx.tcx.hir().local_def_id(hir_id); if !cx.tcx.has_attr(def_id.to_def_id(), sym::test) { let expr = if is_async_fn(kind) { match get_async_fn_body(cx.tcx, body) { diff --git a/src/tools/clippy/clippy_lints/src/copy_iterator.rs b/src/tools/clippy/clippy_lints/src/copy_iterator.rs index e38f77268..0fc115232 100644 --- a/src/tools/clippy/clippy_lints/src/copy_iterator.rs +++ b/src/tools/clippy/clippy_lints/src/copy_iterator.rs @@ -43,7 +43,7 @@ impl<'tcx> LateLintPass<'tcx> for CopyIterator { of_trait: Some(ref trait_ref), .. }) = item.kind; - let ty = cx.tcx.type_of(item.owner_id); + let ty = cx.tcx.type_of(item.owner_id).subst_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); diff --git a/src/tools/clippy/clippy_lints/src/declared_lints.rs b/src/tools/clippy/clippy_lints/src/declared_lints.rs index 91ca73633..cd5dd7a57 100644 --- a/src/tools/clippy/clippy_lints/src/declared_lints.rs +++ b/src/tools/clippy/clippy_lints/src/declared_lints.rs @@ -156,6 +156,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[ crate::exhaustive_items::EXHAUSTIVE_STRUCTS_INFO, crate::exit::EXIT_INFO, crate::explicit_write::EXPLICIT_WRITE_INFO, + crate::extra_unused_type_parameters::EXTRA_UNUSED_TYPE_PARAMETERS_INFO, crate::fallible_impl_from::FALLIBLE_IMPL_FROM_INFO, crate::float_literal::EXCESSIVE_PRECISION_INFO, crate::float_literal::LOSSY_FLOAT_LITERAL_INFO, @@ -178,6 +179,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[ crate::from_raw_with_void_ptr::FROM_RAW_WITH_VOID_PTR_INFO, crate::from_str_radix_10::FROM_STR_RADIX_10_INFO, crate::functions::DOUBLE_MUST_USE_INFO, + crate::functions::IMPL_TRAIT_IN_PARAMS_INFO, crate::functions::MISNAMED_GETTERS_INFO, crate::functions::MUST_USE_CANDIDATE_INFO, crate::functions::MUST_USE_UNIT_INFO, @@ -223,6 +225,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[ crate::let_underscore::LET_UNDERSCORE_FUTURE_INFO, crate::let_underscore::LET_UNDERSCORE_LOCK_INFO, crate::let_underscore::LET_UNDERSCORE_MUST_USE_INFO, + crate::let_underscore::LET_UNDERSCORE_UNTYPED_INFO, crate::lifetimes::EXTRA_UNUSED_LIFETIMES_INFO, crate::lifetimes::NEEDLESS_LIFETIMES_INFO, crate::literal_representation::DECIMAL_LITERAL_REPRESENTATION_INFO, @@ -377,6 +380,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[ crate::methods::SKIP_WHILE_NEXT_INFO, crate::methods::STABLE_SORT_PRIMITIVE_INFO, crate::methods::STRING_EXTEND_CHARS_INFO, + crate::methods::SUSPICIOUS_COMMAND_ARG_SPACE_INFO, crate::methods::SUSPICIOUS_MAP_INFO, crate::methods::SUSPICIOUS_SPLITN_INFO, crate::methods::SUSPICIOUS_TO_OWNED_INFO, @@ -422,6 +426,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[ crate::module_style::MOD_MODULE_FILES_INFO, crate::module_style::SELF_NAMED_MODULE_FILES_INFO, crate::multi_assignments::MULTI_ASSIGNMENTS_INFO, + crate::multiple_unsafe_ops_per_block::MULTIPLE_UNSAFE_OPS_PER_BLOCK_INFO, crate::mut_key::MUTABLE_KEY_TYPE_INFO, crate::mut_mut::MUT_MUT_INFO, crate::mut_reference::UNNECESSARY_MUT_PASSED_INFO, @@ -445,6 +450,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[ crate::no_effect::NO_EFFECT_INFO, crate::no_effect::NO_EFFECT_UNDERSCORE_BINDING_INFO, crate::no_effect::UNNECESSARY_OPERATION_INFO, + crate::no_mangle_with_rust_abi::NO_MANGLE_WITH_RUST_ABI_INFO, crate::non_copy_const::BORROW_INTERIOR_MUTABLE_CONST_INFO, crate::non_copy_const::DECLARE_INTERIOR_MUTABLE_CONST_INFO, crate::non_expressive_names::JUST_UNDERSCORES_AND_DIGITS_INFO, @@ -504,6 +510,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[ crate::ptr_offset_with_cast::PTR_OFFSET_WITH_CAST_INFO, crate::pub_use::PUB_USE_INFO, crate::question_mark::QUESTION_MARK_INFO, + crate::question_mark_used::QUESTION_MARK_USED_INFO, crate::ranges::MANUAL_RANGE_CONTAINS_INFO, crate::ranges::RANGE_MINUS_ONE_INFO, crate::ranges::RANGE_PLUS_ONE_INFO, @@ -534,6 +541,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[ crate::shadow::SHADOW_REUSE_INFO, crate::shadow::SHADOW_SAME_INFO, crate::shadow::SHADOW_UNRELATED_INFO, + crate::significant_drop_tightening::SIGNIFICANT_DROP_TIGHTENING_INFO, crate::single_char_lifetime_names::SINGLE_CHAR_LIFETIME_NAMES_INFO, crate::single_component_path_imports::SINGLE_COMPONENT_PATH_IMPORTS_INFO, crate::size_of_in_element_count::SIZE_OF_IN_ELEMENT_COUNT_INFO, @@ -571,6 +579,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[ crate::transmute::TRANSMUTE_INT_TO_BOOL_INFO, crate::transmute::TRANSMUTE_INT_TO_CHAR_INFO, crate::transmute::TRANSMUTE_INT_TO_FLOAT_INFO, + crate::transmute::TRANSMUTE_INT_TO_NON_ZERO_INFO, crate::transmute::TRANSMUTE_NULL_TO_FN_INFO, crate::transmute::TRANSMUTE_NUM_TO_BYTES_INFO, crate::transmute::TRANSMUTE_PTR_TO_PTR_INFO, diff --git a/src/tools/clippy/clippy_lints/src/default.rs b/src/tools/clippy/clippy_lints/src/default.rs index a04693f46..080d44e63 100644 --- a/src/tools/clippy/clippy_lints/src/default.rs +++ b/src/tools/clippy/clippy_lints/src/default.rs @@ -150,7 +150,7 @@ impl<'tcx> LateLintPass<'tcx> for Default { .fields .iter() .all(|field| { - is_copy(cx, cx.tcx.type_of(field.did)) + is_copy(cx, cx.tcx.type_of(field.did).subst_identity()) }); if !has_drop(cx, binding_type) || all_fields_are_copy; then { 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 03460689e..4e1a6cd4d 100644 --- a/src/tools/clippy/clippy_lints/src/default_numeric_fallback.rs +++ b/src/tools/clippy/clippy_lints/src/default_numeric_fallback.rs @@ -141,7 +141,7 @@ impl<'a, 'tcx> Visitor<'tcx> for NumericFallbackVisitor<'a, 'tcx> { ExprKind::MethodCall(_, receiver, args, _) => { if let Some(def_id) = self.cx.typeck_results().type_dependent_def_id(expr.hir_id) { - let fn_sig = self.cx.tcx.fn_sig(def_id).skip_binder(); + let fn_sig = self.cx.tcx.fn_sig(def_id).subst_identity().skip_binder(); for (expr, bound) in iter::zip(std::iter::once(*receiver).chain(args.iter()), fn_sig.inputs()) { self.ty_bounds.push((*bound).into()); self.visit_expr(expr); @@ -167,7 +167,7 @@ impl<'a, 'tcx> Visitor<'tcx> for NumericFallbackVisitor<'a, 'tcx> { .iter() .find_map(|f_def| { if f_def.ident(self.cx.tcx) == field.ident - { Some(self.cx.tcx.type_of(f_def.did)) } + { Some(self.cx.tcx.type_of(f_def.did).subst_identity()) } else { None } }); self.ty_bounds.push(bound.into()); @@ -215,7 +215,7 @@ fn fn_sig_opt<'tcx>(cx: &LateContext<'tcx>, hir_id: HirId) -> Option<PolyFnSig<' let node_ty = cx.typeck_results().node_type_opt(hir_id)?; // We can't use `Ty::fn_sig` because it automatically performs substs, this may result in FNs. match node_ty.kind() { - ty::FnDef(def_id, _) => Some(cx.tcx.fn_sig(*def_id)), + ty::FnDef(def_id, _) => Some(cx.tcx.fn_sig(*def_id).subst_identity()), ty::FnPtr(fn_sig) => Some(*fn_sig), _ => None, } diff --git a/src/tools/clippy/clippy_lints/src/dereference.rs b/src/tools/clippy/clippy_lints/src/dereference.rs index 05f2b92c0..7f3f26bed 100644 --- a/src/tools/clippy/clippy_lints/src/dereference.rs +++ b/src/tools/clippy/clippy_lints/src/dereference.rs @@ -3,7 +3,7 @@ use clippy_utils::mir::{enclosing_mir, expr_local, local_assignments, used_exact use clippy_utils::msrvs::{self, Msrv}; use clippy_utils::source::{snippet_with_applicability, snippet_with_context}; use clippy_utils::sugg::has_enclosing_paren; -use clippy_utils::ty::{expr_sig, is_copy, peel_mid_ty_refs, ty_sig, variant_of_res}; +use clippy_utils::ty::{adt_and_variant_of_res, expr_sig, is_copy, peel_mid_ty_refs, ty_sig}; use clippy_utils::{ fn_def_id, get_parent_expr, get_parent_expr_for_hir, is_lint_allowed, path_to_local, walk_to_expr_usage, }; @@ -26,8 +26,8 @@ use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::mir::{Rvalue, StatementKind}; use rustc_middle::ty::adjustment::{Adjust, Adjustment, AutoBorrow, AutoBorrowMutability}; use rustc_middle::ty::{ - self, Binder, BoundVariableKind, Clause, EarlyBinder, FnSig, GenericArgKind, List, ParamTy, PredicateKind, - ProjectionPredicate, Ty, TyCtxt, TypeVisitable, TypeckResults, + self, Binder, BoundVariableKind, Clause, EarlyBinder, FnSig, GenericArgKind, List, ParamEnv, ParamTy, + PredicateKind, ProjectionPredicate, Ty, TyCtxt, TypeVisitableExt, TypeckResults, }; use rustc_session::{declare_tool_lint, impl_lint_pass}; use rustc_span::{symbol::sym, Span, Symbol}; @@ -735,8 +735,8 @@ fn walk_parents<'tcx>( span, .. }) if span.ctxt() == ctxt => { - let ty = cx.tcx.type_of(owner_id.def_id); - Some(ty_auto_deref_stability(cx, ty, precedence).position_for_result(cx)) + let ty = cx.tcx.type_of(owner_id.def_id).subst_identity(); + Some(ty_auto_deref_stability(cx.tcx, cx.param_env, ty, precedence).position_for_result(cx)) }, Node::Item(&Item { @@ -759,8 +759,8 @@ fn walk_parents<'tcx>( }) if span.ctxt() == ctxt => { let output = cx .tcx - .erase_late_bound_regions(cx.tcx.fn_sig(owner_id.to_def_id()).output()); - Some(ty_auto_deref_stability(cx, output, precedence).position_for_result(cx)) + .erase_late_bound_regions(cx.tcx.fn_sig(owner_id).subst_identity().output()); + Some(ty_auto_deref_stability(cx.tcx, cx.param_env, output, precedence).position_for_result(cx)) }, Node::ExprField(field) if field.span.ctxt() == ctxt => match get_parent_expr_for_hir(cx, field.hir_id) { @@ -768,31 +768,44 @@ fn walk_parents<'tcx>( hir_id, kind: ExprKind::Struct(path, ..), .. - }) => variant_of_res(cx, cx.qpath_res(path, *hir_id)) - .and_then(|variant| variant.fields.iter().find(|f| f.name == field.ident.name)) - .map(|field_def| { - ty_auto_deref_stability(cx, cx.tcx.type_of(field_def.did), precedence).position_for_arg() + }) => adt_and_variant_of_res(cx, cx.qpath_res(path, *hir_id)) + .and_then(|(adt, variant)| { + variant + .fields + .iter() + .find(|f| f.name == field.ident.name) + .map(|f| (adt, f)) + }) + .map(|(adt, field_def)| { + ty_auto_deref_stability( + cx.tcx, + // Use the param_env of the target type. + cx.tcx.param_env(adt.did()), + cx.tcx.type_of(field_def.did).subst_identity(), + precedence, + ) + .position_for_arg() }), _ => None, }, Node::Expr(parent) if parent.span.ctxt() == ctxt => match parent.kind { ExprKind::Ret(_) => { - let owner_id = cx.tcx.hir().body_owner(cx.enclosing_body.unwrap()); + let owner_id = cx.tcx.hir().body_owner_def_id(cx.enclosing_body.unwrap()); Some( if let Node::Expr( closure_expr @ Expr { kind: ExprKind::Closure(closure), .. }, - ) = cx.tcx.hir().get(owner_id) + ) = cx.tcx.hir().get_by_def_id(owner_id) { closure_result_position(cx, closure, cx.typeck_results().expr_ty(closure_expr), precedence) } else { let output = cx .tcx - .erase_late_bound_regions(cx.tcx.fn_sig(cx.tcx.hir().local_def_id(owner_id)).output()); - ty_auto_deref_stability(cx, output, precedence).position_for_result(cx) + .erase_late_bound_regions(cx.tcx.fn_sig(owner_id).subst_identity().output()); + ty_auto_deref_stability(cx.tcx, cx.param_env, output, precedence).position_for_result(cx) }, ) }, @@ -835,15 +848,20 @@ fn walk_parents<'tcx>( msrv, ) } else { - ty_auto_deref_stability(cx, cx.tcx.erase_late_bound_regions(ty), precedence) - .position_for_arg() + ty_auto_deref_stability( + cx.tcx, + // Use the param_env of the target function. + sig.predicates_id().map_or(ParamEnv::empty(), |id| cx.tcx.param_env(id)), + cx.tcx.erase_late_bound_regions(ty), + precedence + ).position_for_arg() } }, } }) }), ExprKind::MethodCall(method, receiver, args, _) => { - let id = cx.typeck_results().type_dependent_def_id(parent.hir_id).unwrap(); + let fn_id = cx.typeck_results().type_dependent_def_id(parent.hir_id).unwrap(); if receiver.hir_id == child_id { // Check for calls to trait methods where the trait is implemented on a reference. // Two cases need to be handled: @@ -852,13 +870,17 @@ fn walk_parents<'tcx>( // priority. if e.hir_id != child_id { return Some(Position::ReborrowStable(precedence)) - } else if let Some(trait_id) = cx.tcx.trait_of_item(id) + } else if let Some(trait_id) = cx.tcx.trait_of_item(fn_id) && let arg_ty = cx.tcx.erase_regions(cx.typeck_results().expr_ty_adjusted(e)) && let ty::Ref(_, sub_ty, _) = *arg_ty.kind() && let subs = cx .typeck_results() .node_substs_opt(parent.hir_id).map(|subs| &subs[1..]).unwrap_or_default() - && let impl_ty = if cx.tcx.fn_sig(id).skip_binder().inputs()[0].is_ref() { + && let impl_ty = if cx.tcx.fn_sig(fn_id) + .subst_identity() + .skip_binder() + .inputs()[0].is_ref() + { // Trait methods taking `&self` sub_ty } else { @@ -879,10 +901,13 @@ fn walk_parents<'tcx>( return Some(Position::MethodReceiver); } args.iter().position(|arg| arg.hir_id == child_id).map(|i| { - let ty = cx.tcx.fn_sig(id).skip_binder().inputs()[i + 1]; + let ty = cx.tcx.fn_sig(fn_id).subst_identity().input(i + 1); // `e.hir_id == child_id` for https://github.com/rust-lang/rust-clippy/issues/9739 // `method.args.is_none()` for https://github.com/rust-lang/rust-clippy/issues/9782 - if e.hir_id == child_id && method.args.is_none() && let ty::Param(param_ty) = ty.kind() { + if e.hir_id == child_id + && method.args.is_none() + && let ty::Param(param_ty) = ty.skip_binder().kind() + { needless_borrow_impl_arg_position( cx, possible_borrowers, @@ -895,8 +920,10 @@ fn walk_parents<'tcx>( ) } else { ty_auto_deref_stability( - cx, - cx.tcx.erase_late_bound_regions(cx.tcx.fn_sig(id).input(i + 1)), + cx.tcx, + // Use the param_env of the target function. + cx.tcx.param_env(fn_id), + cx.tcx.erase_late_bound_regions(ty), precedence, ) .position_for_arg() @@ -1022,7 +1049,7 @@ fn binding_ty_auto_deref_stability<'tcx>( )) .is_sized(cx.tcx, cx.param_env.without_caller_bounds()), ), - TyKind::OpaqueDef(..) | TyKind::Infer | TyKind::Typeof(..) | TyKind::TraitObject(..) | TyKind::Err => { + TyKind::OpaqueDef(..) | TyKind::Infer | TyKind::Typeof(..) | TyKind::TraitObject(..) | TyKind::Err(_) => { Position::ReborrowStable(precedence) }, }; @@ -1038,7 +1065,7 @@ fn ty_contains_infer(ty: &hir::Ty<'_>) -> bool { if self.0 || matches!( ty.kind, - TyKind::OpaqueDef(..) | TyKind::Infer | TyKind::Typeof(_) | TyKind::Err + TyKind::OpaqueDef(..) | TyKind::Infer | TyKind::Typeof(_) | TyKind::Err(_) ) { self.0 = true; @@ -1093,7 +1120,7 @@ fn needless_borrow_impl_arg_position<'tcx>( let sized_trait_def_id = cx.tcx.lang_items().sized_trait(); let Some(callee_def_id) = fn_def_id(cx, parent) else { return Position::Other(precedence) }; - let fn_sig = cx.tcx.fn_sig(callee_def_id).skip_binder(); + let fn_sig = cx.tcx.fn_sig(callee_def_id).subst_identity().skip_binder(); let substs_with_expr_ty = cx .typeck_results() .node_substs(if let ExprKind::Call(callee, _) = parent.kind { @@ -1221,7 +1248,7 @@ fn has_ref_mut_self_method(cx: &LateContext<'_>, trait_def_id: DefId) -> bool { .in_definition_order() .any(|assoc_item| { if assoc_item.fn_has_self_parameter { - let self_ty = cx.tcx.fn_sig(assoc_item.def_id).skip_binder().inputs()[0]; + let self_ty = cx.tcx.fn_sig(assoc_item.def_id).subst_identity().skip_binder().inputs()[0]; matches!(self_ty.kind(), ty::Ref(_, _, Mutability::Mut)) } else { false @@ -1330,10 +1357,10 @@ fn replace_types<'tcx>( && let Some(term_ty) = projection_predicate.term.ty() && let ty::Param(term_param_ty) = term_ty.kind() { - let item_def_id = projection_predicate.projection_ty.def_id; - let assoc_item = cx.tcx.associated_item(item_def_id); - let projection = cx.tcx - .mk_projection(assoc_item.def_id, cx.tcx.mk_substs_trait(new_ty, [])); + let projection = cx.tcx.mk_ty_from_kind(ty::Alias( + ty::Projection, + projection_predicate.projection_ty.with_self_ty(cx.tcx, new_ty), + )); if let Ok(projected_ty) = cx.tcx.try_normalize_erasing_regions(cx.param_env, projection) && substs[term_param_ty.index as usize] != ty::GenericArg::from(projected_ty) @@ -1378,11 +1405,18 @@ impl<'tcx> TyPosition<'tcx> { } // Checks whether a type is stable when switching to auto dereferencing, -fn ty_auto_deref_stability<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>, precedence: i8) -> TyPosition<'tcx> { +fn ty_auto_deref_stability<'tcx>( + tcx: TyCtxt<'tcx>, + param_env: ParamEnv<'tcx>, + ty: Ty<'tcx>, + precedence: i8, +) -> TyPosition<'tcx> { let ty::Ref(_, mut ty, _) = *ty.kind() else { return Position::Other(precedence).into(); }; + ty = tcx.try_normalize_erasing_regions(param_env, ty).unwrap_or(ty); + loop { break match *ty.kind() { ty::Ref(_, ref_ty, _) => { @@ -1419,12 +1453,11 @@ fn ty_auto_deref_stability<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>, precedenc | ty::FnDef(..) | ty::Generator(..) | ty::GeneratorWitness(..) + | ty::GeneratorWitnessMIR(..) | ty::Closure(..) | ty::Never | ty::Tuple(_) - | ty::Alias(ty::Projection, _) => { - Position::DerefStable(precedence, ty.is_sized(cx.tcx, cx.param_env.without_caller_bounds())).into() - }, + | ty::Alias(ty::Projection, _) => Position::DerefStable(precedence, ty.is_sized(tcx, param_env)).into(), }; } } diff --git a/src/tools/clippy/clippy_lints/src/derivable_impls.rs b/src/tools/clippy/clippy_lints/src/derivable_impls.rs index bc18e2e5e..f95b8ccf0 100644 --- a/src/tools/clippy/clippy_lints/src/derivable_impls.rs +++ b/src/tools/clippy/clippy_lints/src/derivable_impls.rs @@ -184,7 +184,7 @@ impl<'tcx> LateLintPass<'tcx> for DerivableImpls { 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 Some(adt_def) = cx.tcx.type_of(item.owner_id).ty_adt_def(); + if let Some(adt_def) = cx.tcx.type_of(item.owner_id).subst_identity().ty_adt_def(); if let attrs = cx.tcx.hir().attrs(item.hir_id()); if !attrs.iter().any(|attr| attr.doc_str().is_some()); if let child_attrs = cx.tcx.hir().attrs(impl_item_hir); diff --git a/src/tools/clippy/clippy_lints/src/derive.rs b/src/tools/clippy/clippy_lints/src/derive.rs index 248d73884..b8428d66a 100644 --- a/src/tools/clippy/clippy_lints/src/derive.rs +++ b/src/tools/clippy/clippy_lints/src/derive.rs @@ -7,7 +7,7 @@ use rustc_errors::Applicability; use rustc_hir::def_id::DefId; use rustc_hir::intravisit::{walk_expr, walk_fn, walk_item, FnKind, Visitor}; use rustc_hir::{ - self as hir, BlockCheckMode, BodyId, Constness, Expr, ExprKind, FnDecl, HirId, Impl, Item, ItemKind, UnsafeSource, + self as hir, BlockCheckMode, BodyId, Constness, Expr, ExprKind, FnDecl, Impl, Item, ItemKind, UnsafeSource, Unsafety, }; use rustc_lint::{LateContext, LateLintPass}; @@ -18,6 +18,7 @@ use rustc_middle::ty::{ TraitPredicate, Ty, TyCtxt, }; use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_span::def_id::LocalDefId; use rustc_span::source_map::Span; use rustc_span::sym; @@ -210,7 +211,7 @@ impl<'tcx> LateLintPass<'tcx> for Derive { .. }) = item.kind { - let ty = cx.tcx.type_of(item.owner_id); + let ty = cx.tcx.type_of(item.owner_id).subst_identity(); let is_automatically_derived = cx.tcx.has_attr(item.owner_id.to_def_id(), sym::automatically_derived); check_hash_peq(cx, item.span, trait_ref, ty, is_automatically_derived); @@ -346,7 +347,7 @@ fn check_copy_clone<'tcx>(cx: &LateContext<'tcx>, item: &Item<'_>, trait_ref: &h let has_copy_impl = cx.tcx.all_local_trait_impls(()).get(©_id).map_or(false, |impls| { impls .iter() - .any(|&id| matches!(cx.tcx.type_of(id).kind(), ty::Adt(adt, _) if ty_adt.did() == adt.did())) + .any(|&id| matches!(cx.tcx.type_of(id).subst_identity().kind(), ty::Adt(adt, _) if ty_adt.did() == adt.did())) }); if !has_copy_impl { return; @@ -425,7 +426,7 @@ struct UnsafeVisitor<'a, 'tcx> { impl<'tcx> Visitor<'tcx> for UnsafeVisitor<'_, 'tcx> { type NestedFilter = nested_filter::All; - fn visit_fn(&mut self, kind: FnKind<'tcx>, decl: &'tcx FnDecl<'_>, body_id: BodyId, _: Span, id: HirId) { + fn visit_fn(&mut self, kind: FnKind<'tcx>, decl: &'tcx FnDecl<'_>, body_id: BodyId, _: Span, id: LocalDefId) { if self.has_unsafe { return; } @@ -513,7 +514,7 @@ fn param_env_for_derived_eq(tcx: TyCtxt<'_>, did: DefId, eq_trait_id: DefId) -> } ParamEnv::new( - tcx.mk_predicates(ty_predicates.iter().map(|&(p, _)| p).chain( + tcx.mk_predicates_from_iter(ty_predicates.iter().map(|&(p, _)| p).chain( params.iter().filter(|&&(_, needs_eq)| needs_eq).map(|&(param, _)| { tcx.mk_predicate(Binder::dummy(PredicateKind::Clause(Clause::Trait(TraitPredicate { trait_ref: tcx.mk_trait_ref(eq_trait_id, [tcx.mk_param_from_def(param)]), diff --git a/src/tools/clippy/clippy_lints/src/doc.rs b/src/tools/clippy/clippy_lints/src/doc.rs index cdc23a4d2..384aca7fe 100644 --- a/src/tools/clippy/clippy_lints/src/doc.rs +++ b/src/tools/clippy/clippy_lints/src/doc.rs @@ -6,12 +6,17 @@ 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 itertools::Itertools; +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, AttrKind, Attribute, Fn, FnRetTy, ItemKind}; use rustc_ast::token::CommentKind; 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_errors::{Applicability, Handler, SuggestionStyle, TerminalUrl}; use rustc_hir as hir; use rustc_hir::intravisit::{self, Visitor}; use rustc_hir::{AnonConst, Expr}; @@ -23,7 +28,6 @@ use rustc_parse::maybe_new_parser_from_source_str; use rustc_parse::parser::ForceCollect; use rustc_session::parse::ParseSess; use rustc_session::{declare_tool_lint, impl_lint_pass}; -use rustc_span::def_id::LocalDefId; use rustc_span::edition::Edition; use rustc_span::source_map::{BytePos, FilePathMapping, SourceMap, Span}; use rustc_span::{sym, FileName, Pos}; @@ -251,7 +255,7 @@ declare_clippy_lint! { /// unimplemented!(); /// } /// ``` - #[clippy::version = "1.66.0"] + #[clippy::version = "1.67.0"] pub UNNECESSARY_SAFETY_DOC, restriction, "`pub fn` or `pub trait` with `# Safety` docs" @@ -302,7 +306,7 @@ impl<'tcx> LateLintPass<'tcx> for DocMarkdown { panic_span: None, }; fpu.visit_expr(body.value); - lint_for_missing_headers(cx, item.owner_id.def_id, sig, headers, Some(body_id), fpu.panic_span); + lint_for_missing_headers(cx, item.owner_id, sig, headers, Some(body_id), fpu.panic_span); } }, hir::ItemKind::Impl(impl_) => { @@ -338,7 +342,7 @@ impl<'tcx> LateLintPass<'tcx> for DocMarkdown { let Some(headers) = check_attrs(cx, &self.valid_idents, attrs) else { return }; 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.def_id, sig, headers, None, None); + lint_for_missing_headers(cx, item.owner_id, sig, headers, None, None); } } } @@ -357,20 +361,20 @@ impl<'tcx> LateLintPass<'tcx> for DocMarkdown { panic_span: None, }; fpu.visit_expr(body.value); - lint_for_missing_headers(cx, item.owner_id.def_id, sig, headers, Some(body_id), fpu.panic_span); + lint_for_missing_headers(cx, item.owner_id, sig, headers, Some(body_id), fpu.panic_span); } } } fn lint_for_missing_headers( cx: &LateContext<'_>, - def_id: LocalDefId, + owner_id: hir::OwnerId, sig: &hir::FnSig<'_>, headers: DocHeaders, body_id: Option<hir::BodyId>, panic_span: Option<Span>, ) { - if !cx.effective_visibilities.is_exported(def_id) { + if !cx.effective_visibilities.is_exported(owner_id.def_id) { return; // Private functions do not require doc comments } @@ -378,13 +382,13 @@ fn lint_for_missing_headers( if cx .tcx .hir() - .parent_iter(cx.tcx.hir().local_def_id_to_hir_id(def_id)) + .parent_iter(owner_id.into()) .any(|(id, _node)| is_doc_hidden(cx.tcx.hir().attrs(id))) { return; } - let span = cx.tcx.def_span(def_id); + let span = cx.tcx.def_span(owner_id); match (headers.safety, sig.header.unsafety) { (false, hir::Unsafety::Unsafe) => span_lint( cx, @@ -411,8 +415,7 @@ fn lint_for_missing_headers( ); } if !headers.errors { - let hir_id = cx.tcx.hir().local_def_id_to_hir_id(def_id); - if is_type_diagnostic_item(cx, return_ty(cx, hir_id), sym::Result) { + if is_type_diagnostic_item(cx, return_ty(cx, owner_id), sym::Result) { span_lint( cx, MISSING_ERRORS_DOC, @@ -499,7 +502,6 @@ struct DocHeaders { } fn check_attrs(cx: &LateContext<'_>, valid_idents: &FxHashSet<String>, attrs: &[Attribute]) -> Option<DocHeaders> { - use pulldown_cmark::{BrokenLink, CowStr, Options}; /// 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 are /// point to a fake address. @@ -540,8 +542,6 @@ fn check_attrs(cx: &LateContext<'_>, valid_idents: &FxHashSet<String>, attrs: &[ pulldown_cmark::Parser::new_with_broken_link_callback(&doc, Options::empty(), Some(&mut cb)).into_offset_iter(); // Iterate over all `Events` and combine consecutive events into one let events = parser.coalesce(|previous, current| { - use pulldown_cmark::Event::Text; - let previous_range = previous.1; let current_range = current.1; @@ -566,12 +566,6 @@ fn check_doc<'a, Events: Iterator<Item = (pulldown_cmark::Event<'a>, Range<usize spans: &[(usize, Span)], ) -> DocHeaders { // true if a safety header was found - 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::{CodeBlockKind, CowStr}; - let mut headers = DocHeaders::default(); let mut in_code = false; let mut in_link = None; @@ -662,6 +656,12 @@ fn check_doc<'a, Events: Iterator<Item = (pulldown_cmark::Event<'a>, Range<usize check_link_quotes(cx, in_link.is_some(), trimmed_text, span, &range, begin, text.len()); // Adjust for the beginning of the current `Event` let span = span.with_lo(span.lo() + BytePos::from_usize(range.start - begin)); + if let Some(link) = in_link.as_ref() + && let Ok(url) = Url::parse(link) + && (url.scheme() == "https" || url.scheme() == "http") { + // Don't check the text associated with external URLs + continue; + } text_to_check.push((text, span)); } }, @@ -707,7 +707,7 @@ fn check_code(cx: &LateContext<'_>, text: &str, edition: Edition, span: Span) { let sm = Lrc::new(SourceMap::new(FilePathMapping::empty())); let fallback_bundle = - rustc_errors::fallback_fluent_bundle(rustc_errors::DEFAULT_LOCALE_RESOURCES, false); + rustc_errors::fallback_fluent_bundle(rustc_driver::DEFAULT_LOCALE_RESOURCES.to_vec(), false); let emitter = EmitterWriter::new( Box::new(io::sink()), None, @@ -719,6 +719,7 @@ fn check_code(cx: &LateContext<'_>, text: &str, edition: Edition, span: Span) { None, false, false, + TerminalUrl::No, ); let handler = Handler::with_emitter(false, None, Box::new(emitter)); let sess = ParseSess::with_span_handler(handler, sm); diff --git a/src/tools/clippy/clippy_lints/src/empty_enum.rs b/src/tools/clippy/clippy_lints/src/empty_enum.rs index 0570c2a10..d94664daa 100644 --- a/src/tools/clippy/clippy_lints/src/empty_enum.rs +++ b/src/tools/clippy/clippy_lints/src/empty_enum.rs @@ -49,7 +49,7 @@ impl<'tcx> LateLintPass<'tcx> for EmptyEnum { } if let ItemKind::Enum(..) = item.kind { - let ty = cx.tcx.type_of(item.owner_id); + let ty = cx.tcx.type_of(item.owner_id).subst_identity(); let adt = ty.ty_adt_def().expect("already checked whether this is an enum"); if adt.variants().is_empty() { span_lint_and_help( diff --git a/src/tools/clippy/clippy_lints/src/entry.rs b/src/tools/clippy/clippy_lints/src/entry.rs index b44e62435..48a54f602 100644 --- a/src/tools/clippy/clippy_lints/src/entry.rs +++ b/src/tools/clippy/clippy_lints/src/entry.rs @@ -6,7 +6,7 @@ use clippy_utils::{ source::{reindent_multiline, snippet_indent, snippet_with_applicability, snippet_with_context}, SpanlessEq, }; -use core::fmt::Write; +use core::fmt::{self, Write}; use rustc_errors::Applicability; use rustc_hir::{ hir_id::HirIdSet, @@ -65,6 +65,10 @@ declare_lint_pass!(HashMapPass => [MAP_ENTRY]); impl<'tcx> LateLintPass<'tcx> for HashMapPass { #[expect(clippy::too_many_lines)] fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) { + if expr.span.from_expansion() { + return; + } + let Some(higher::If { cond: cond_expr, then: then_expr, r#else: else_expr }) = higher::If::hir(expr) else { return }; @@ -532,7 +536,7 @@ impl<'tcx> InsertSearchResults<'tcx> { if is_expr_used_or_unified(cx.tcx, insertion.call) { write_wrapped(&mut res, insertion, ctxt, app); } else { - let _ = write!( + let _: fmt::Result = write!( res, "e.insert({})", snippet_with_context(cx, insertion.value.span, ctxt, "..", app).0 @@ -548,7 +552,7 @@ impl<'tcx> InsertSearchResults<'tcx> { ( self.snippet(cx, span, app, |res, insertion, ctxt, app| { // Insertion into a map would return `Some(&mut value)`, but the entry returns `&mut value` - let _ = write!( + let _: fmt::Result = write!( res, "Some(e.insert({}))", snippet_with_context(cx, insertion.value.span, ctxt, "..", app).0 @@ -562,7 +566,7 @@ impl<'tcx> InsertSearchResults<'tcx> { ( self.snippet(cx, span, app, |res, insertion, ctxt, app| { // Insertion into a map would return `None`, but the entry returns a mutable reference. - let _ = if is_expr_final_block_expr(cx.tcx, insertion.call) { + let _: fmt::Result = if is_expr_final_block_expr(cx.tcx, insertion.call) { write!( res, "e.insert({});\n{}None", diff --git a/src/tools/clippy/clippy_lints/src/enum_clike.rs b/src/tools/clippy/clippy_lints/src/enum_clike.rs index da6788882..e275efaba 100644 --- a/src/tools/clippy/clippy_lints/src/enum_clike.rs +++ b/src/tools/clippy/clippy_lints/src/enum_clike.rs @@ -45,7 +45,7 @@ impl<'tcx> LateLintPass<'tcx> for UnportableVariant { for var in def.variants { if let Some(anon_const) = &var.disr_expr { let def_id = cx.tcx.hir().body_owner_def_id(anon_const.body); - let mut ty = cx.tcx.type_of(def_id.to_def_id()); + let mut ty = cx.tcx.type_of(def_id.to_def_id()).subst_identity(); let constant = cx .tcx .const_eval_poly(def_id.to_def_id()) diff --git a/src/tools/clippy/clippy_lints/src/enum_variants.rs b/src/tools/clippy/clippy_lints/src/enum_variants.rs index b77b5621b..4c69dacf3 100644 --- a/src/tools/clippy/clippy_lints/src/enum_variants.rs +++ b/src/tools/clippy/clippy_lints/src/enum_variants.rs @@ -277,7 +277,7 @@ impl LateLintPass<'_> for EnumVariantNames { Some(c) if is_word_beginning(c) => span_lint( cx, MODULE_NAME_REPETITIONS, - item.span, + item.ident.span, "item name starts with its containing module's name", ), _ => (), @@ -287,7 +287,7 @@ impl LateLintPass<'_> for EnumVariantNames { span_lint( cx, MODULE_NAME_REPETITIONS, - item.span, + item.ident.span, "item name ends with its containing module's name", ); } diff --git a/src/tools/clippy/clippy_lints/src/escape.rs b/src/tools/clippy/clippy_lints/src/escape.rs index dfb438933..d6ab4c25e 100644 --- a/src/tools/clippy/clippy_lints/src/escape.rs +++ b/src/tools/clippy/clippy_lints/src/escape.rs @@ -8,6 +8,7 @@ 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_span::def_id::LocalDefId; use rustc_span::source_map::Span; use rustc_span::symbol::kw; use rustc_target::spec::abi::Abi; @@ -63,7 +64,7 @@ impl<'tcx> LateLintPass<'tcx> for BoxedLocal { _: &'tcx FnDecl<'_>, body: &'tcx Body<'_>, _: Span, - hir_id: HirId, + fn_def_id: LocalDefId, ) { if let Some(header) = fn_kind.header() { if header.abi != Abi::Rust { @@ -71,7 +72,11 @@ impl<'tcx> LateLintPass<'tcx> for BoxedLocal { } } - let parent_id = cx.tcx.hir().get_parent_item(hir_id).def_id; + let parent_id = cx + .tcx + .hir() + .get_parent_item(cx.tcx.hir().local_def_id_to_hir_id(fn_def_id)) + .def_id; let parent_node = cx.tcx.hir().find_by_def_id(parent_id); let mut trait_self_ty = None; @@ -84,7 +89,7 @@ impl<'tcx> LateLintPass<'tcx> for BoxedLocal { // find `self` ty for this trait if relevant if let ItemKind::Trait(_, _, _, _, items) = item.kind { for trait_item in items { - if trait_item.id.hir_id() == hir_id { + if trait_item.id.owner_id.def_id == fn_def_id { // be sure we have `self` parameter in this function if trait_item.kind == (AssocItemKind::Fn { has_self: true }) { trait_self_ty = Some( @@ -105,7 +110,6 @@ impl<'tcx> LateLintPass<'tcx> for BoxedLocal { too_large_for_stack: self.too_large_for_stack, }; - let fn_def_id = cx.tcx.hir().local_def_id(hir_id); let infcx = cx.tcx.infer_ctxt().build(); ExprUseVisitor::new(&mut v, &infcx, fn_def_id, cx.param_env, cx.typeck_results()).consume_body(body); diff --git a/src/tools/clippy/clippy_lints/src/eta_reduction.rs b/src/tools/clippy/clippy_lints/src/eta_reduction.rs index 3543910c3..b2071f4dc 100644 --- a/src/tools/clippy/clippy_lints/src/eta_reduction.rs +++ b/src/tools/clippy/clippy_lints/src/eta_reduction.rs @@ -11,7 +11,7 @@ use rustc_hir::{Closure, Expr, ExprKind, Param, PatKind, Unsafety}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::adjustment::{Adjust, Adjustment, AutoBorrow}; use rustc_middle::ty::binding::BindingMode; -use rustc_middle::ty::{self, EarlyBinder, SubstsRef, Ty, TypeVisitable}; +use rustc_middle::ty::{self, EarlyBinder, SubstsRef, Ty, TypeVisitableExt}; use rustc_session::{declare_lint_pass, declare_tool_lint}; use rustc_span::symbol::sym; @@ -108,7 +108,7 @@ impl<'tcx> LateLintPass<'tcx> for EtaReduction { if check_inputs(cx, body.params, None, args); let callee_ty = cx.typeck_results().expr_ty_adjusted(callee); let call_ty = cx.typeck_results().type_dependent_def_id(body.value.hir_id) - .map_or(callee_ty, |id| cx.tcx.type_of(id)); + .map_or(callee_ty, |id| cx.tcx.type_of(id).subst_identity()); if check_sig(cx, closure_ty, call_ty); let substs = cx.typeck_results().node_substs(callee.hir_id); // This fixes some false positives that I don't entirely understand @@ -153,7 +153,7 @@ impl<'tcx> LateLintPass<'tcx> for EtaReduction { if check_inputs(cx, body.params, Some(receiver), args); let method_def_id = cx.typeck_results().type_dependent_def_id(body.value.hir_id).unwrap(); let substs = cx.typeck_results().node_substs(body.value.hir_id); - let call_ty = cx.tcx.bound_type_of(method_def_id).subst(cx.tcx, substs); + let call_ty = cx.tcx.type_of(method_def_id).subst(cx.tcx, substs); if check_sig(cx, closure_ty, call_ty); then { span_lint_and_then(cx, REDUNDANT_CLOSURE_FOR_METHOD_CALLS, expr.span, "redundant closure", |diag| { @@ -233,7 +233,7 @@ fn get_ufcs_type_name<'tcx>(cx: &LateContext<'tcx>, method_def_id: DefId, substs match assoc_item.container { ty::TraitContainer => cx.tcx.def_path_str(def_id), ty::ImplContainer => { - let ty = cx.tcx.type_of(def_id); + let ty = cx.tcx.type_of(def_id).skip_binder(); match ty.kind() { ty::Adt(adt, _) => cx.tcx.def_path_str(adt.did()), ty::Array(..) diff --git a/src/tools/clippy/clippy_lints/src/excessive_bools.rs b/src/tools/clippy/clippy_lints/src/excessive_bools.rs index fc2912f69..aef2db385 100644 --- a/src/tools/clippy/clippy_lints/src/excessive_bools.rs +++ b/src/tools/clippy/clippy_lints/src/excessive_bools.rs @@ -1,9 +1,10 @@ use clippy_utils::diagnostics::span_lint_and_help; use clippy_utils::{get_parent_as_impl, has_repr_attr, is_bool}; use rustc_hir::intravisit::FnKind; -use rustc_hir::{Body, FnDecl, HirId, Item, ItemKind, TraitFn, TraitItem, TraitItemKind, Ty}; +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_span::def_id::LocalDefId; use rustc_span::Span; use rustc_target::spec::abi::Abi; @@ -168,8 +169,9 @@ impl<'tcx> LateLintPass<'tcx> for ExcessiveBools { fn_decl: &'tcx FnDecl<'tcx>, _: &'tcx Body<'tcx>, span: Span, - hir_id: HirId, + def_id: LocalDefId, ) { + let hir_id = cx.tcx.hir().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) diff --git a/src/tools/clippy/clippy_lints/src/exhaustive_items.rs b/src/tools/clippy/clippy_lints/src/exhaustive_items.rs index 1fece5d1c..9fd13084d 100644 --- a/src/tools/clippy/clippy_lints/src/exhaustive_items.rs +++ b/src/tools/clippy/clippy_lints/src/exhaustive_items.rs @@ -79,8 +79,7 @@ impl LateLintPass<'_> for ExhaustiveItems { then { let (lint, msg) = if let ItemKind::Struct(ref v, ..) = item.kind { if v.fields().iter().any(|f| { - let def_id = cx.tcx.hir().local_def_id(f.hir_id); - !cx.tcx.visibility(def_id).is_public() + !cx.tcx.visibility(f.def_id).is_public() }) { // skip structs with private fields return; 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 new file mode 100644 index 000000000..20565e1d2 --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/extra_unused_type_parameters.rs @@ -0,0 +1,229 @@ +use clippy_utils::diagnostics::span_lint_and_help; +use clippy_utils::trait_ref_of_method; +use rustc_data_structures::fx::FxHashMap; +use rustc_errors::MultiSpan; +use rustc_hir::intravisit::{walk_impl_item, walk_item, walk_param_bound, walk_ty, Visitor}; +use rustc_hir::{ + BodyId, ExprKind, GenericBound, GenericParamKind, Generics, ImplItem, ImplItemKind, Item, ItemKind, + PredicateOrigin, Ty, TyKind, WherePredicate, +}; +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_span::{ + def_id::{DefId, LocalDefId}, + Span, +}; + +declare_clippy_lint! { + /// ### What it does + /// Checks for type parameters in generics that are never used anywhere else. + /// + /// ### Why is this bad? + /// Functions cannot infer the value of unused type parameters; therefore, calling them + /// requires using a turbofish, which serves no purpose but to satisfy the compiler. + /// + /// ### Example + /// ```rust + /// fn unused_ty<T>(x: u8) { + /// // .. + /// } + /// ``` + /// Use instead: + /// ```rust + /// fn no_unused_ty(x: u8) { + /// // .. + /// } + /// ``` + #[clippy::version = "1.69.0"] + pub EXTRA_UNUSED_TYPE_PARAMETERS, + complexity, + "unused type parameters in function definitions" +} + +pub struct ExtraUnusedTypeParameters { + avoid_breaking_exported_api: bool, +} + +impl ExtraUnusedTypeParameters { + pub fn new(avoid_breaking_exported_api: bool) -> Self { + Self { + avoid_breaking_exported_api, + } + } + + /// Don't lint external macros or functions with empty bodies. Also, don't lint public items if + /// the `avoid_breaking_exported_api` config option is set. + fn check_false_positive(&self, cx: &LateContext<'_>, span: Span, def_id: LocalDefId, body_id: BodyId) -> bool { + let body = cx.tcx.hir().body(body_id).value; + let fn_empty = matches!(&body.kind, ExprKind::Block(blk, None) if blk.stmts.is_empty() && blk.expr.is_none()); + let is_exported = cx.effective_visibilities.is_exported(def_id); + in_external_macro(cx.sess(), span) || (self.avoid_breaking_exported_api && is_exported) || fn_empty + } +} + +impl_lint_pass!(ExtraUnusedTypeParameters => [EXTRA_UNUSED_TYPE_PARAMETERS]); + +/// A visitor struct that walks a given function and gathers generic type parameters, plus any +/// trait bounds those parameters have. +struct TypeWalker<'cx, 'tcx> { + cx: &'cx LateContext<'tcx>, + /// Collection of all the function's type parameters. + ty_params: FxHashMap<DefId, Span>, + /// Collection of any (inline) trait bounds corresponding to each type parameter. + bounds: FxHashMap<DefId, Span>, + /// The entire `Generics` object of the function, useful for querying purposes. + generics: &'tcx Generics<'tcx>, + /// The value of this will remain `true` if *every* parameter: + /// 1. Is a type parameter, and + /// 2. Goes unused in the function. + /// Otherwise, if any type parameters end up being used, or if any lifetime or const-generic + /// parameters are present, this will be set to `false`. + all_params_unused: bool, +} + +impl<'cx, 'tcx> TypeWalker<'cx, 'tcx> { + fn new(cx: &'cx LateContext<'tcx>, generics: &'tcx Generics<'tcx>) -> Self { + let mut all_params_unused = true; + let ty_params = generics + .params + .iter() + .filter_map(|param| { + if let GenericParamKind::Type { synthetic, .. } = param.kind { + (!synthetic).then_some((param.def_id.into(), param.span)) + } else { + if !param.is_elided_lifetime() { + all_params_unused = false; + } + None + } + }) + .collect(); + + Self { + cx, + ty_params, + bounds: FxHashMap::default(), + generics, + all_params_unused, + } + } + + fn mark_param_used(&mut self, def_id: DefId) { + if self.ty_params.remove(&def_id).is_some() { + self.all_params_unused = false; + } + } + + fn emit_lint(&self) { + let (msg, help) = match self.ty_params.len() { + 0 => return, + 1 => ( + "type parameter goes unused in function definition", + "consider removing the parameter", + ), + _ => ( + "type parameters go unused in function definition", + "consider removing the parameters", + ), + }; + + let source_map = self.cx.sess().source_map(); + let span = if self.all_params_unused { + self.generics.span.into() // Remove the entire list of generics + } else { + MultiSpan::from_spans( + self.ty_params + .iter() + .map(|(def_id, &span)| { + // Extend the span past any trait bounds, and include the comma at the end. + let span_to_extend = self.bounds.get(def_id).copied().map_or(span, Span::shrink_to_hi); + let comma_range = source_map.span_extend_to_next_char(span_to_extend, '>', false); + let comma_span = source_map.span_through_char(comma_range, ','); + span.with_hi(comma_span.hi()) + }) + .collect(), + ) + }; + + span_lint_and_help(self.cx, EXTRA_UNUSED_TYPE_PARAMETERS, span, msg, None, help); + } +} + +/// Given a generic bound, if the bound is for a trait that's not a `LangItem`, return the +/// `LocalDefId` for that trait. +fn bound_to_trait_def_id(bound: &GenericBound<'_>) -> Option<LocalDefId> { + bound.trait_ref()?.trait_def_id()?.as_local() +} + +impl<'cx, 'tcx> Visitor<'tcx> for TypeWalker<'cx, 'tcx> { + type NestedFilter = nested_filter::OnlyBodies; + + fn visit_ty(&mut self, t: &'tcx Ty<'tcx>) { + if let Some((def_id, _)) = t.peel_refs().as_generic_param() { + self.mark_param_used(def_id); + } else if let TyKind::OpaqueDef(id, _, _) = t.kind { + // Explicitly walk OpaqueDef. Normally `walk_ty` would do the job, but it calls + // `visit_nested_item`, which checks that `Self::NestedFilter::INTER` is set. We're + // using `OnlyBodies`, so the check ends up failing and the type isn't fully walked. + let item = self.nested_visit_map().item(id); + walk_item(self, item); + } else { + walk_ty(self, t); + } + } + + fn visit_where_predicate(&mut self, predicate: &'tcx WherePredicate<'tcx>) { + if let WherePredicate::BoundPredicate(predicate) = predicate { + // Collect spans for any bounds on type parameters. We only keep bounds that appear in + // the list of generics (not in a where-clause). + if let Some((def_id, _)) = predicate.bounded_ty.peel_refs().as_generic_param() { + // If the bound contains non-public traits, err on the safe side and don't lint the + // corresponding parameter. + if !predicate + .bounds + .iter() + .filter_map(bound_to_trait_def_id) + .all(|id| self.cx.effective_visibilities.is_exported(id)) + { + self.mark_param_used(def_id); + } else if let PredicateOrigin::GenericParam = predicate.origin { + self.bounds.insert(def_id, predicate.span); + } + } + // Only walk the right-hand side of where-bounds + for bound in predicate.bounds { + walk_param_bound(self, bound); + } + } + } + + fn nested_visit_map(&mut self) -> Self::Map { + self.cx.tcx.hir() + } +} + +impl<'tcx> LateLintPass<'tcx> for ExtraUnusedTypeParameters { + fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx Item<'tcx>) { + if let ItemKind::Fn(_, generics, body_id) = item.kind + && !self.check_false_positive(cx, item.span, item.owner_id.def_id, body_id) + { + let mut walker = TypeWalker::new(cx, generics); + walk_item(&mut walker, item); + walker.emit_lint(); + } + } + + fn check_impl_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx ImplItem<'tcx>) { + // Only lint on inherent methods, not trait methods. + if let ImplItemKind::Fn(.., body_id) = item.kind + && trait_ref_of_method(cx, item.owner_id.def_id).is_none() + && !self.check_false_positive(cx, item.span, item.owner_id.def_id, body_id) + { + let mut walker = TypeWalker::new(cx, item.generics); + walk_impl_item(&mut walker, item); + walker.emit_lint(); + } + } +} diff --git a/src/tools/clippy/clippy_lints/src/format_args.rs b/src/tools/clippy/clippy_lints/src/format_args.rs index 04e6949e1..c511d85e9 100644 --- a/src/tools/clippy/clippy_lints/src/format_args.rs +++ b/src/tools/clippy/clippy_lints/src/format_args.rs @@ -7,14 +7,14 @@ use clippy_utils::macros::{ }; use clippy_utils::msrvs::{self, Msrv}; use clippy_utils::source::snippet_opt; -use clippy_utils::ty::{implements_trait, is_type_diagnostic_item}; +use clippy_utils::ty::{implements_trait, is_type_lang_item}; use if_chain::if_chain; use itertools::Itertools; use rustc_errors::{ Applicability, SuggestionStyle::{CompletelyHidden, ShowCode}, }; -use rustc_hir::{Expr, ExprKind, HirId, QPath}; +use rustc_hir::{Expr, ExprKind, HirId, LangItem, QPath}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::ty::adjustment::{Adjust, Adjustment}; use rustc_middle::ty::Ty; @@ -237,7 +237,7 @@ fn check_unused_format_specifier(cx: &LateContext<'_>, arg: &FormatArg<'_>) { ); } - if is_type_diagnostic_item(cx, param_ty, sym::Arguments) && !arg.format.is_default_for_trait() { + if is_type_lang_item(cx, param_ty, LangItem::FormatArguments) && !arg.format.is_default_for_trait() { span_lint_and_then( cx, UNUSED_FORMAT_SPECS, @@ -311,6 +311,10 @@ fn check_uninlined_args( // in those cases, make the code suggestion hidden let multiline_fix = fixes.iter().any(|(span, _)| cx.sess().source_map().is_multiline(*span)); + // Suggest removing each argument only once, for example in `format!("{0} {0}", arg)`. + fixes.sort_unstable_by_key(|(span, _)| *span); + fixes.dedup_by_key(|(span, _)| *span); + span_lint_and_then( cx, UNINLINED_FORMAT_ARGS, @@ -336,6 +340,7 @@ fn check_one_arg( if matches!(param.kind, Implicit | Starred | Named(_) | Numbered) && let ExprKind::Path(QPath::Resolved(None, path)) = param.value.kind && let [segment] = path.segments + && segment.args.is_none() && let Some(arg_span) = args.value_with_prev_comma_span(param.value.hir_id) { let replacement = match param.usage { 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 00f5ba564..096508dc4 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 @@ -31,7 +31,7 @@ declare_clippy_lint! { /// let _ = unsafe { Box::from_raw(ptr as *mut usize) }; /// ``` /// - #[clippy::version = "1.66.0"] + #[clippy::version = "1.67.0"] pub FROM_RAW_WITH_VOID_PTR, suspicious, "creating a `Box` from a void raw pointer" 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 new file mode 100644 index 000000000..2811a73f6 --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/functions/impl_trait_in_params.rs @@ -0,0 +1,50 @@ +use clippy_utils::{diagnostics::span_lint_and_then, is_in_test_function}; + +use rustc_hir::{intravisit::FnKind, Body, HirId}; +use rustc_lint::LateContext; +use rustc_span::Span; + +use super::IMPL_TRAIT_IN_PARAMS; + +pub(super) fn check_fn<'tcx>(cx: &LateContext<'_>, kind: &'tcx FnKind<'_>, body: &'tcx Body<'_>, hir_id: HirId) { + if cx.tcx.visibility(cx.tcx.hir().body_owner_def_id(body.id())).is_public() && !is_in_test_function(cx.tcx, hir_id) + { + if let FnKind::ItemFn(ident, generics, _) = kind { + for param in generics.params { + if param.is_impl_trait() { + // No generics with nested generics, and no generics like FnMut(x) + span_lint_and_then( + cx, + IMPL_TRAIT_IN_PARAMS, + param.span, + "'`impl Trait` used as a function parameter'", + |diag| { + if let Some(gen_span) = generics.span_for_param_suggestion() { + diag.span_suggestion_with_style( + gen_span, + "add a type paremeter", + format!(", {{ /* Generic name */ }}: {}", ¶m.name.ident().as_str()[5..]), + rustc_errors::Applicability::HasPlaceholders, + rustc_errors::SuggestionStyle::ShowAlways, + ); + } else { + diag.span_suggestion_with_style( + Span::new( + body.params[0].span.lo() - rustc_span::BytePos(1), + ident.span.hi(), + ident.span.ctxt(), + ident.span.parent(), + ), + "add a type paremeter", + format!("<{{ /* Generic name */ }}: {}>", ¶m.name.ident().as_str()[5..]), + rustc_errors::Applicability::HasPlaceholders, + rustc_errors::SuggestionStyle::ShowAlways, + ); + } + }, + ); + } + } + } + } +} 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 27acad45c..8b53ee68e 100644 --- a/src/tools/clippy/clippy_lints/src/functions/misnamed_getters.rs +++ b/src/tools/clippy/clippy_lints/src/functions/misnamed_getters.rs @@ -1,7 +1,7 @@ use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::source::snippet; use rustc_errors::Applicability; -use rustc_hir::{intravisit::FnKind, Body, ExprKind, FnDecl, HirId, ImplicitSelfKind, Unsafety}; +use rustc_hir::{intravisit::FnKind, Body, ExprKind, FnDecl, ImplicitSelfKind, Unsafety}; use rustc_lint::LateContext; use rustc_middle::ty; use rustc_span::Span; @@ -10,14 +10,7 @@ use std::iter; use super::MISNAMED_GETTERS; -pub fn check_fn( - cx: &LateContext<'_>, - kind: FnKind<'_>, - decl: &FnDecl<'_>, - body: &Body<'_>, - span: Span, - _hir_id: HirId, -) { +pub fn check_fn(cx: &LateContext<'_>, kind: FnKind<'_>, decl: &FnDecl<'_>, body: &Body<'_>, span: Span) { let FnKind::Method(ref ident, sig) = kind else { return; }; diff --git a/src/tools/clippy/clippy_lints/src/functions/mod.rs b/src/tools/clippy/clippy_lints/src/functions/mod.rs index 9dbce3f88..d2852b4ac 100644 --- a/src/tools/clippy/clippy_lints/src/functions/mod.rs +++ b/src/tools/clippy/clippy_lints/src/functions/mod.rs @@ -1,3 +1,4 @@ +mod impl_trait_in_params; mod misnamed_getters; mod must_use; mod not_unsafe_ptr_arg_deref; @@ -9,6 +10,7 @@ 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_span::def_id::LocalDefId; use rustc_span::Span; declare_clippy_lint! { @@ -326,6 +328,32 @@ declare_clippy_lint! { "getter method returning the wrong field" } +declare_clippy_lint! { + /// ### What it does + /// Lints when `impl Trait` is being used in a function's paremeters. + /// ### Why is this bad? + /// Turbofish syntax (`::<>`) cannot be used when `impl Trait` is being used, making `impl Trait` less powerful. Readability may also be a factor. + /// + /// ### Example + /// ```rust + /// trait MyTrait {} + /// fn foo(a: impl MyTrait) { + /// // [...] + /// } + /// ``` + /// Use instead: + /// ```rust + /// trait MyTrait {} + /// fn foo<T: MyTrait>(a: T) { + /// // [...] + /// } + /// ``` + #[clippy::version = "1.68.0"] + pub IMPL_TRAIT_IN_PARAMS, + restriction, + "`impl Trait` is used in the function's parameters" +} + #[derive(Copy, Clone)] pub struct Functions { too_many_arguments_threshold: u64, @@ -353,6 +381,7 @@ impl_lint_pass!(Functions => [ RESULT_UNIT_ERR, RESULT_LARGE_ERR, MISNAMED_GETTERS, + IMPL_TRAIT_IN_PARAMS, ]); impl<'tcx> LateLintPass<'tcx> for Functions { @@ -363,12 +392,14 @@ impl<'tcx> LateLintPass<'tcx> for Functions { decl: &'tcx hir::FnDecl<'_>, body: &'tcx hir::Body<'_>, span: Span, - hir_id: hir::HirId, + def_id: LocalDefId, ) { + let hir_id = cx.tcx.hir().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, hir_id); - misnamed_getters::check_fn(cx, kind, decl, body, span, hir_id); + not_unsafe_ptr_arg_deref::check_fn(cx, kind, decl, body, def_id); + misnamed_getters::check_fn(cx, kind, decl, body, span); + impl_trait_in_params::check_fn(cx, &kind, body, hir_id); } fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx hir::Item<'_>) { diff --git a/src/tools/clippy/clippy_lints/src/functions/must_use.rs b/src/tools/clippy/clippy_lints/src/functions/must_use.rs index d22bede36..29bdc46b6 100644 --- a/src/tools/clippy/clippy_lints/src/functions/must_use.rs +++ b/src/tools/clippy/clippy_lints/src/functions/must_use.rs @@ -1,6 +1,6 @@ use rustc_ast::ast::Attribute; use rustc_errors::Applicability; -use rustc_hir::def_id::{DefIdSet, LocalDefId}; +use rustc_hir::def_id::DefIdSet; use rustc_hir::{self as hir, def::Res, QPath}; use rustc_lint::{LateContext, LintContext}; use rustc_middle::{ @@ -27,14 +27,14 @@ pub(super) fn check_item<'tcx>(cx: &LateContext<'tcx>, item: &'tcx hir::Item<'_> let is_public = cx.effective_visibilities.is_exported(item.owner_id.def_id); let fn_header_span = item.span.with_hi(sig.decl.output.span().hi()); if let Some(attr) = attr { - check_needless_must_use(cx, sig.decl, item.hir_id(), item.span, fn_header_span, attr); + check_needless_must_use(cx, sig.decl, item.owner_id, item.span, fn_header_span, attr); } else if is_public && !is_proc_macro(cx.sess(), attrs) && !attrs.iter().any(|a| a.has_name(sym::no_mangle)) { check_must_use_candidate( cx, sig.decl, cx.tcx.hir().body(*body_id), item.span, - item.owner_id.def_id, + item.owner_id, item.span.with_hi(sig.decl.output.span().hi()), "this function could have a `#[must_use]` attribute", ); @@ -49,7 +49,7 @@ pub(super) fn check_impl_item<'tcx>(cx: &LateContext<'tcx>, item: &'tcx hir::Imp let attrs = cx.tcx.hir().attrs(item.hir_id()); let attr = cx.tcx.get_attr(item.owner_id.to_def_id(), sym::must_use); if let Some(attr) = attr { - check_needless_must_use(cx, sig.decl, item.hir_id(), item.span, fn_header_span, attr); + check_needless_must_use(cx, sig.decl, item.owner_id, item.span, fn_header_span, attr); } else if is_public && !is_proc_macro(cx.sess(), attrs) && trait_ref_of_method(cx, item.owner_id.def_id).is_none() @@ -59,7 +59,7 @@ pub(super) fn check_impl_item<'tcx>(cx: &LateContext<'tcx>, item: &'tcx hir::Imp sig.decl, cx.tcx.hir().body(*body_id), item.span, - item.owner_id.def_id, + item.owner_id, item.span.with_hi(sig.decl.output.span().hi()), "this method could have a `#[must_use]` attribute", ); @@ -75,7 +75,7 @@ pub(super) fn check_trait_item<'tcx>(cx: &LateContext<'tcx>, item: &'tcx hir::Tr let attrs = cx.tcx.hir().attrs(item.hir_id()); let attr = cx.tcx.get_attr(item.owner_id.to_def_id(), sym::must_use); if let Some(attr) = attr { - check_needless_must_use(cx, sig.decl, item.hir_id(), item.span, fn_header_span, attr); + check_needless_must_use(cx, sig.decl, item.owner_id, item.span, fn_header_span, attr); } else if let hir::TraitFn::Provided(eid) = *eid { let body = cx.tcx.hir().body(eid); if attr.is_none() && is_public && !is_proc_macro(cx.sess(), attrs) { @@ -84,7 +84,7 @@ pub(super) fn check_trait_item<'tcx>(cx: &LateContext<'tcx>, item: &'tcx hir::Tr sig.decl, body, item.span, - item.owner_id.def_id, + item.owner_id, item.span.with_hi(sig.decl.output.span().hi()), "this method could have a `#[must_use]` attribute", ); @@ -96,7 +96,7 @@ pub(super) fn check_trait_item<'tcx>(cx: &LateContext<'tcx>, item: &'tcx hir::Tr fn check_needless_must_use( cx: &LateContext<'_>, decl: &hir::FnDecl<'_>, - item_id: hir::HirId, + item_id: hir::OwnerId, item_span: Span, fn_header_span: Span, attr: &Attribute, @@ -131,7 +131,7 @@ fn check_must_use_candidate<'tcx>( decl: &'tcx hir::FnDecl<'_>, body: &'tcx hir::Body<'_>, item_span: Span, - item_id: LocalDefId, + item_id: hir::OwnerId, fn_span: Span, msg: &str, ) { @@ -139,8 +139,8 @@ fn check_must_use_candidate<'tcx>( || mutates_static(cx, body) || in_external_macro(cx.sess(), item_span) || returns_unit(decl) - || !cx.effective_visibilities.is_exported(item_id) - || is_must_use_ty(cx, return_ty(cx, cx.tcx.hir().local_def_id_to_hir_id(item_id))) + || !cx.effective_visibilities.is_exported(item_id.def_id) + || is_must_use_ty(cx, return_ty(cx, item_id)) { return; } diff --git a/src/tools/clippy/clippy_lints/src/functions/not_unsafe_ptr_arg_deref.rs b/src/tools/clippy/clippy_lints/src/functions/not_unsafe_ptr_arg_deref.rs index 2c0bf551f..f2aa7b597 100644 --- a/src/tools/clippy/clippy_lints/src/functions/not_unsafe_ptr_arg_deref.rs +++ b/src/tools/clippy/clippy_lints/src/functions/not_unsafe_ptr_arg_deref.rs @@ -17,7 +17,7 @@ pub(super) fn check_fn<'tcx>( kind: intravisit::FnKind<'tcx>, decl: &'tcx hir::FnDecl<'tcx>, body: &'tcx hir::Body<'tcx>, - hir_id: hir::HirId, + def_id: LocalDefId, ) { let unsafety = match kind { intravisit::FnKind::ItemFn(_, _, hir::FnHeader { unsafety, .. }) => unsafety, @@ -25,7 +25,7 @@ pub(super) fn check_fn<'tcx>( intravisit::FnKind::Closure => return, }; - check_raw_ptr(cx, unsafety, decl, body, cx.tcx.hir().local_def_id(hir_id)); + check_raw_ptr(cx, unsafety, decl, body, def_id); } pub(super) fn check_trait_item<'tcx>(cx: &LateContext<'tcx>, item: &'tcx hir::TraitItem<'_>) { @@ -58,7 +58,7 @@ fn check_raw_ptr<'tcx>( }, hir::ExprKind::MethodCall(_, recv, args, _) => { let def_id = typeck.type_dependent_def_id(e.hir_id).unwrap(); - if cx.tcx.fn_sig(def_id).skip_binder().unsafety == hir::Unsafety::Unsafe { + if cx.tcx.fn_sig(def_id).skip_binder().skip_binder().unsafety == hir::Unsafety::Unsafe { check_arg(cx, &raw_ptrs, recv); for arg in args { check_arg(cx, &raw_ptrs, arg); diff --git a/src/tools/clippy/clippy_lints/src/functions/result.rs b/src/tools/clippy/clippy_lints/src/functions/result.rs index 23da145d0..fa2a9b30c 100644 --- a/src/tools/clippy/clippy_lints/src/functions/result.rs +++ b/src/tools/clippy/clippy_lints/src/functions/result.rs @@ -21,7 +21,7 @@ fn result_err_ty<'tcx>( ) -> Option<(&'tcx hir::Ty<'tcx>, Ty<'tcx>)> { if !in_external_macro(cx.sess(), item_span) && let hir::FnRetTy::Return(hir_ty) = decl.output - && let ty = cx.tcx.erase_late_bound_regions(cx.tcx.fn_sig(id).output()) + && let ty = cx.tcx.erase_late_bound_regions(cx.tcx.fn_sig(id).subst_identity().output()) && is_type_diagnostic_item(cx, ty, sym::Result) && let ty::Adt(_, substs) = ty.kind() { 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 989f83cf8..9fb73a371 100644 --- a/src/tools/clippy/clippy_lints/src/future_not_send.rs +++ b/src/tools/clippy/clippy_lints/src/future_not_send.rs @@ -1,11 +1,12 @@ use clippy_utils::diagnostics::span_lint_and_then; use clippy_utils::return_ty; use rustc_hir::intravisit::FnKind; -use rustc_hir::{Body, FnDecl, HirId}; +use rustc_hir::{Body, FnDecl}; use rustc_infer::infer::TyCtxtInferExt; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::{self, AliasTy, Clause, EarlyBinder, PredicateKind}; use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_span::def_id::LocalDefId; use rustc_span::{sym, Span}; use rustc_trait_selection::traits::error_reporting::suggestions::TypeErrCtxtExt; use rustc_trait_selection::traits::{self, FulfillmentError}; @@ -56,12 +57,12 @@ impl<'tcx> LateLintPass<'tcx> for FutureNotSend { decl: &'tcx FnDecl<'tcx>, _: &'tcx Body<'tcx>, _: Span, - hir_id: HirId, + fn_def_id: LocalDefId, ) { if let FnKind::Closure = kind { return; } - let ret_ty = return_ty(cx, hir_id); + let ret_ty = return_ty(cx, cx.tcx.hir().local_def_id_to_hir_id(fn_def_id).expect_owner()); if let ty::Alias(ty::Opaque, AliasTy { def_id, substs, .. }) = *ret_ty.kind() { let preds = cx.tcx.explicit_item_bounds(def_id); let mut is_future = false; @@ -78,7 +79,7 @@ impl<'tcx> LateLintPass<'tcx> for FutureNotSend { let send_trait = cx.tcx.get_diagnostic_item(sym::Send).unwrap(); let span = decl.output.span(); let infcx = cx.tcx.infer_ctxt().build(); - let cause = traits::ObligationCause::misc(span, hir_id); + let cause = traits::ObligationCause::misc(span, fn_def_id); let send_errors = traits::fully_solve_bound(&infcx, cause, cx.param_env, ret_ty, send_trait); if !send_errors.is_empty() { span_lint_and_then( diff --git a/src/tools/clippy/clippy_lints/src/implicit_return.rs b/src/tools/clippy/clippy_lints/src/implicit_return.rs index 946d04eff..372b6ead3 100644 --- a/src/tools/clippy/clippy_lints/src/implicit_return.rs +++ b/src/tools/clippy/clippy_lints/src/implicit_return.rs @@ -11,6 +11,7 @@ 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_span::def_id::LocalDefId; use rustc_span::{Span, SyntaxContext}; declare_clippy_lint! { @@ -223,7 +224,7 @@ impl<'tcx> LateLintPass<'tcx> for ImplicitReturn { decl: &'tcx FnDecl<'_>, body: &'tcx Body<'_>, span: Span, - _: HirId, + _: LocalDefId, ) { if (!matches!(kind, FnKind::Closure) && matches!(decl.output, FnRetTy::DefaultReturn(_))) || span.ctxt() != body.value.span.ctxt() 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 29d59c26d..0c7aea6da 100644 --- a/src/tools/clippy/clippy_lints/src/implicit_saturating_sub.rs +++ b/src/tools/clippy/clippy_lints/src/implicit_saturating_sub.rs @@ -102,7 +102,7 @@ impl<'tcx> LateLintPass<'tcx> for ImplicitSaturatingSub { 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).is_integral(); + if cx.tcx.type_of(impl_id).subst_identity().is_integral(); then { print_lint_and_sugg(cx, var_name, expr) } @@ -115,7 +115,7 @@ impl<'tcx> LateLintPass<'tcx> for ImplicitSaturatingSub { 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).is_integral(); + if cx.tcx.type_of(impl_id).subst_identity().is_integral(); then { print_lint_and_sugg(cx, var_name, expr) } 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 e2f2d3d42..1ad886f2c 100644 --- a/src/tools/clippy/clippy_lints/src/inconsistent_struct_constructor.rs +++ b/src/tools/clippy/clippy_lints/src/inconsistent_struct_constructor.rs @@ -7,7 +7,7 @@ use rustc_hir::{self as hir, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_session::{declare_lint_pass, declare_tool_lint}; use rustc_span::symbol::Symbol; -use std::fmt::Write as _; +use std::fmt::{self, Write as _}; declare_clippy_lint! { /// ### What it does @@ -90,7 +90,7 @@ impl<'tcx> LateLintPass<'tcx> for InconsistentStructConstructor { let mut fields_snippet = String::new(); let (last_ident, idents) = ordered_fields.split_last().unwrap(); for ident in idents { - let _ = write!(fields_snippet, "{ident}, "); + let _: fmt::Result = write!(fields_snippet, "{ident}, "); } fields_snippet.push_str(&last_ident.to_string()); diff --git a/src/tools/clippy/clippy_lints/src/indexing_slicing.rs b/src/tools/clippy/clippy_lints/src/indexing_slicing.rs index eebfb753a..c384172fb 100644 --- a/src/tools/clippy/clippy_lints/src/indexing_slicing.rs +++ b/src/tools/clippy/clippy_lints/src/indexing_slicing.rs @@ -109,7 +109,7 @@ impl<'tcx> LateLintPass<'tcx> for IndexingSlicing { if let Some(range) = higher::Range::hir(index) { // Ranged indexes, i.e., &x[n..m], &x[n..], &x[..n] and &x[..] if let ty::Array(_, s) = ty.kind() { - let size: u128 = if let Some(size) = s.try_eval_usize(cx.tcx, cx.param_env) { + let size: u128 = if let Some(size) = s.try_eval_target_usize(cx.tcx, cx.param_env) { size.into() } else { return; diff --git a/src/tools/clippy/clippy_lints/src/inherent_impl.rs b/src/tools/clippy/clippy_lints/src/inherent_impl.rs index e9b2e31a7..7c41699f3 100644 --- a/src/tools/clippy/clippy_lints/src/inherent_impl.rs +++ b/src/tools/clippy/clippy_lints/src/inherent_impl.rs @@ -66,7 +66,8 @@ impl<'tcx> LateLintPass<'tcx> for MultipleInherentImpl { ) }) { for impl_id in impl_ids.iter().map(|id| id.expect_local()) { - match type_map.entry(cx.tcx.type_of(impl_id)) { + let impl_ty = cx.tcx.type_of(impl_id).subst_identity(); + match type_map.entry(impl_ty) { Entry::Vacant(e) => { // Store the id for the first impl block of this type. The span is retrieved lazily. e.insert(IdOrSpan::Id(impl_id)); 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 aaecc4fa8..d43e5cc9b 100644 --- a/src/tools/clippy/clippy_lints/src/inherent_to_string.rs +++ b/src/tools/clippy/clippy_lints/src/inherent_to_string.rs @@ -105,7 +105,7 @@ impl<'tcx> LateLintPass<'tcx> for InherentToString { if impl_item.generics.params.iter().all(|p| matches!(p.kind, GenericParamKind::Lifetime { .. })); // Check if return type is String - if is_type_lang_item(cx, return_ty(cx, impl_item.hir_id()), LangItem::String); + if is_type_lang_item(cx, return_ty(cx, impl_item.owner_id), LangItem::String); // Filters instances of to_string which are required by a trait if trait_ref_of_method(cx, impl_item.owner_id.def_id).is_none(); @@ -124,7 +124,7 @@ fn show_lint(cx: &LateContext<'_>, item: &ImplItem<'_>) { .expect("Failed to get trait ID of `Display`!"); // Get the real type of 'self' - let self_type = cx.tcx.fn_sig(item.owner_id).input(0); + let self_type = cx.tcx.fn_sig(item.owner_id).skip_binder().input(0); let self_type = self_type.skip_binder().peel_refs(); // Emit either a warning or an error diff --git a/src/tools/clippy/clippy_lints/src/instant_subtraction.rs b/src/tools/clippy/clippy_lints/src/instant_subtraction.rs index 9f6e89405..668110c7c 100644 --- a/src/tools/clippy/clippy_lints/src/instant_subtraction.rs +++ b/src/tools/clippy/clippy_lints/src/instant_subtraction.rs @@ -59,7 +59,7 @@ declare_clippy_lint! { /// /// [`Duration`]: std::time::Duration /// [`Instant::now()`]: std::time::Instant::now; - #[clippy::version = "1.65.0"] + #[clippy::version = "1.67.0"] pub UNCHECKED_DURATION_SUBTRACTION, pedantic, "finds unchecked subtraction of a 'Duration' from an 'Instant'" 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 e76de77f1..c924d7361 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 @@ -66,7 +66,9 @@ impl<'tcx> LateLintPass<'tcx> for IterNotReturningIterator { fn check_sig(cx: &LateContext<'_>, name: &str, sig: &FnSig<'_>, fn_id: LocalDefId) { if sig.decl.implicit_self.has_implicit_self() { - let ret_ty = cx.tcx.erase_late_bound_regions(cx.tcx.fn_sig(fn_id).output()); + let ret_ty = cx + .tcx + .erase_late_bound_regions(cx.tcx.fn_sig(fn_id).subst_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/large_const_arrays.rs b/src/tools/clippy/clippy_lints/src/large_const_arrays.rs index db637dfc0..4dc750c03 100644 --- a/src/tools/clippy/clippy_lints/src/large_const_arrays.rs +++ b/src/tools/clippy/clippy_lints/src/large_const_arrays.rs @@ -54,7 +54,7 @@ impl<'tcx> LateLintPass<'tcx> for LargeConstArrays { let ty = hir_ty_to_ty(cx.tcx, hir_ty); 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_machine_usize(cx.tcx); + 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); 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 b8d4abdbb..1c99bd2f3 100644 --- a/src/tools/clippy/clippy_lints/src/large_enum_variant.rs +++ b/src/tools/clippy/clippy_lints/src/large_enum_variant.rs @@ -83,7 +83,7 @@ impl<'tcx> LateLintPass<'tcx> for LargeEnumVariant { return; } if let ItemKind::Enum(ref def, _) = item.kind { - let ty = cx.tcx.type_of(item.owner_id); + let ty = cx.tcx.type_of(item.owner_id).subst_identity(); let Adt(adt, subst) = ty.kind() else { panic!("already checked whether this is an enum") }; 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 89ae83d48..32c6312e0 100644 --- a/src/tools/clippy/clippy_lints/src/large_stack_arrays.rs +++ b/src/tools/clippy/clippy_lints/src/large_stack_arrays.rs @@ -41,7 +41,7 @@ impl<'tcx> LateLintPass<'tcx> for LargeStackArrays { if let ExprKind::Repeat(_, _) = expr.kind && let ty::Array(element_type, cst) = cx.typeck_results().expr_ty(expr).kind() && let ConstKind::Value(ty::ValTree::Leaf(element_count)) = cst.kind() - && let Ok(element_count) = element_count.try_to_machine_usize(cx.tcx) + && 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()) && !cx.tcx.hir().parent_iter(expr.hir_id) .any(|(_, node)| matches!(node, Node::Item(Item { kind: ItemKind::Static(..), .. }))) diff --git a/src/tools/clippy/clippy_lints/src/len_zero.rs b/src/tools/clippy/clippy_lints/src/len_zero.rs index 3c70c9cf1..e13bc4797 100644 --- a/src/tools/clippy/clippy_lints/src/len_zero.rs +++ b/src/tools/clippy/clippy_lints/src/len_zero.rs @@ -135,6 +135,7 @@ impl<'tcx> LateLintPass<'tcx> for LenZero { 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()); @@ -144,7 +145,7 @@ impl<'tcx> LateLintPass<'tcx> for LenZero { 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).skip_binder()); + if let Some(output) = parse_len_output(cx, cx.tcx.fn_sig(item.owner_id).subst_identity().skip_binder()); then { let (name, kind) = match cx.tcx.hir().find(ty_hir_id) { Some(Node::ForeignItem(x)) => (x.ident.name, "extern type"), @@ -196,7 +197,15 @@ fn check_trait_items(cx: &LateContext<'_>, visited_trait: &Item<'_>, trait_items fn is_named_self(cx: &LateContext<'_>, item: &TraitItemRef, name: Symbol) -> bool { item.ident.name == name && if let AssocItemKind::Fn { has_self } = item.kind { - has_self && { cx.tcx.fn_sig(item.id.owner_id).inputs().skip_binder().len() == 1 } + has_self && { + cx.tcx + .fn_sig(item.id.owner_id) + .skip_binder() + .inputs() + .skip_binder() + .len() + == 1 + } } else { false } @@ -224,7 +233,7 @@ fn check_trait_items(cx: &LateContext<'_>, visited_trait: &Item<'_>, trait_items .any(|i| { i.kind == ty::AssocKind::Fn && i.fn_has_self_parameter - && cx.tcx.fn_sig(i.def_id).inputs().skip_binder().len() == 1 + && cx.tcx.fn_sig(i.def_id).skip_binder().inputs().skip_binder().len() == 1 }); if !is_empty_method_found { @@ -342,7 +351,11 @@ fn check_for_is_empty<'tcx>( ), Some(is_empty) if !(is_empty.fn_has_self_parameter - && check_is_empty_sig(cx.tcx.fn_sig(is_empty.def_id).skip_binder(), self_kind, output)) => + && check_is_empty_sig( + cx.tcx.fn_sig(is_empty.def_id).subst_identity().skip_binder(), + self_kind, + output, + )) => { ( format!( @@ -473,7 +486,7 @@ fn has_is_empty(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool { /// Gets an `AssocItem` and return true if it matches `is_empty(self)`. fn is_is_empty(cx: &LateContext<'_>, item: &ty::AssocItem) -> bool { if item.kind == ty::AssocKind::Fn { - let sig = cx.tcx.fn_sig(item.def_id); + let sig = cx.tcx.fn_sig(item.def_id).skip_binder(); let ty = sig.skip_binder(); ty.inputs().len() == 1 } else { diff --git a/src/tools/clippy/clippy_lints/src/let_underscore.rs b/src/tools/clippy/clippy_lints/src/let_underscore.rs index 61f87b914..7600777fa 100644 --- a/src/tools/clippy/clippy_lints/src/let_underscore.rs +++ b/src/tools/clippy/clippy_lints/src/let_underscore.rs @@ -84,13 +84,51 @@ declare_clippy_lint! { /// let _ = foo().await; /// # } /// ``` - #[clippy::version = "1.66"] + #[clippy::version = "1.67.0"] pub LET_UNDERSCORE_FUTURE, suspicious, "non-binding `let` on a future" } -declare_lint_pass!(LetUnderscore => [LET_UNDERSCORE_MUST_USE, LET_UNDERSCORE_LOCK, LET_UNDERSCORE_FUTURE]); +declare_clippy_lint! { + /// ### What it does + /// Checks for `let _ = <expr>` without a type annotation, and suggests to either provide one, + /// or remove the `let` keyword altogether. + /// + /// ### Why is this bad? + /// The `let _ = <expr>` expression ignores the value of `<expr>` but will remain doing so even + /// if the type were to change, thus potentially introducing subtle bugs. By supplying a type + /// annotation, one will be forced to re-visit the decision to ignore the value in such cases. + /// + /// ### Known problems + /// The `_ = <expr>` is not properly supported by some tools (e.g. IntelliJ) and may seem odd + /// to many developers. This lint also partially overlaps with the other `let_underscore_*` + /// lints. + /// + /// ### Example + /// ```rust + /// fn foo() -> Result<u32, ()> { + /// Ok(123) + /// } + /// let _ = foo(); + /// ``` + /// Use instead: + /// ```rust + /// fn foo() -> Result<u32, ()> { + /// Ok(123) + /// } + /// // Either provide a type annotation: + /// let _: Result<u32, ()> = foo(); + /// // …or drop the let keyword: + /// _ = foo(); + /// ``` + #[clippy::version = "1.69.0"] + pub LET_UNDERSCORE_UNTYPED, + pedantic, + "non-binding `let` without a type annotation" +} + +declare_lint_pass!(LetUnderscore => [LET_UNDERSCORE_MUST_USE, LET_UNDERSCORE_LOCK, LET_UNDERSCORE_FUTURE, LET_UNDERSCORE_UNTYPED]); const SYNC_GUARD_PATHS: [&[&str]; 3] = [ &paths::PARKING_LOT_MUTEX_GUARD, @@ -148,6 +186,18 @@ impl<'tcx> LateLintPass<'tcx> for LetUnderscore { "consider explicitly using function result", ); } + + if local.pat.default_binding_modes && local.ty.is_none() { + // When `default_binding_modes` is true, the `let` keyword is present. + span_lint_and_help( + cx, + LET_UNDERSCORE_UNTYPED, + local.span, + "non-binding `let` without a type annotation", + None, + "consider adding a type annotation or removing the `let` keyword", + ); + } } } } diff --git a/src/tools/clippy/clippy_lints/src/lib.rs b/src/tools/clippy/clippy_lints/src/lib.rs index e93f27bee..c626e0bd9 100644 --- a/src/tools/clippy/clippy_lints/src/lib.rs +++ b/src/tools/clippy/clippy_lints/src/lib.rs @@ -1,8 +1,8 @@ #![feature(array_windows)] #![feature(binary_heap_into_iter_sorted)] #![feature(box_patterns)] -#![feature(control_flow_enum)] #![feature(drain_filter)] +#![feature(if_let_guard)] #![feature(iter_intersperse)] #![feature(let_chains)] #![feature(lint_reasons)] @@ -43,6 +43,7 @@ extern crate rustc_session; extern crate rustc_span; extern crate rustc_target; extern crate rustc_trait_selection; +extern crate thin_vec; #[macro_use] extern crate clippy_utils; @@ -122,6 +123,7 @@ mod excessive_bools; mod exhaustive_items; mod exit; mod explicit_write; +mod extra_unused_type_parameters; mod fallible_impl_from; mod float_literal; mod floating_point_arithmetic; @@ -198,6 +200,7 @@ mod missing_trait_methods; mod mixed_read_write_in_expression; mod module_style; mod multi_assignments; +mod multiple_unsafe_ops_per_block; mod mut_key; mod mut_mut; mod mut_reference; @@ -217,6 +220,7 @@ mod neg_cmp_op_on_partial_ord; mod neg_multiply; mod new_without_default; mod no_effect; +mod no_mangle_with_rust_abi; mod non_copy_const; mod non_expressive_names; mod non_octal_unix_permissions; @@ -241,6 +245,7 @@ mod ptr; mod ptr_offset_with_cast; mod pub_use; mod question_mark; +mod question_mark_used; mod ranges; mod rc_clone_in_vec_init; mod read_zero_byte_vec; @@ -262,6 +267,7 @@ mod semicolon_block; mod semicolon_if_nothing_returned; mod serde_api; mod shadow; +mod significant_drop_tightening; mod single_char_lifetime_names; mod single_component_path_imports; mod size_of_in_element_count; @@ -557,6 +563,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: store.register_late_pass(|_| Box::new(eta_reduction::EtaReduction)); store.register_late_pass(|_| Box::new(mut_mut::MutMut)); store.register_late_pass(|_| Box::new(mut_reference::UnnecessaryMutPassed)); + 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)); @@ -663,12 +670,13 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: )) }); 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(|_| Box::new(neg_multiply::NegMultiply)); store.register_late_pass(|_| Box::new(mem_forget::MemForget)); store.register_late_pass(|_| Box::new(let_if_seq::LetIfSeq)); store.register_late_pass(|_| Box::new(mixed_read_write_in_expression::EvalOrderDependence)); - store.register_late_pass(|_| Box::new(missing_doc::MissingDoc::new())); + store.register_late_pass(move |_| Box::new(missing_doc::MissingDoc::new(missing_docs_in_crate_items))); store.register_late_pass(|_| Box::new(missing_inline::MissingInline)); store.register_late_pass(move |_| Box::new(exhaustive_items::ExhaustiveItems)); store.register_late_pass(|_| Box::new(match_result_ok::MatchResultOk)); @@ -692,6 +700,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: store.register_late_pass(|_| Box::new(implicit_hasher::ImplicitHasher)); store.register_late_pass(|_| Box::new(fallible_impl_from::FallibleImplFrom)); store.register_late_pass(|_| Box::new(question_mark::QuestionMark)); + store.register_late_pass(|_| Box::new(question_mark_used::QuestionMarkUsed)); store.register_early_pass(|| Box::new(suspicious_operation_groupings::SuspiciousOperationGroupings)); store.register_late_pass(|_| Box::new(suspicious_trait_impl::SuspiciousImpl)); store.register_late_pass(|_| Box::new(map_unit_fn::MapUnit)); @@ -908,6 +917,13 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: store.register_late_pass(|_| Box::new(fn_null_check::FnNullCheck)); store.register_late_pass(|_| Box::new(permissions_set_readonly_false::PermissionsSetReadonlyFalse)); store.register_late_pass(|_| Box::new(size_of_ref::SizeOfRef)); + store.register_late_pass(|_| Box::new(multiple_unsafe_ops_per_block::MultipleUnsafeOpsPerBlock)); + store.register_late_pass(move |_| { + Box::new(extra_unused_type_parameters::ExtraUnusedTypeParameters::new( + avoid_breaking_exported_api, + )) + }); + store.register_late_pass(|_| Box::new(no_mangle_with_rust_abi::NoMangleWithRustAbi)); // 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 7cf1a6b80..986ffcad8 100644 --- a/src/tools/clippy/clippy_lints/src/lifetimes.rs +++ b/src/tools/clippy/clippy_lints/src/lifetimes.rs @@ -1,21 +1,21 @@ use clippy_utils::diagnostics::{span_lint, span_lint_and_then}; use clippy_utils::trait_ref_of_method; use rustc_data_structures::fx::{FxHashMap, FxHashSet}; +use rustc_errors::Applicability; use rustc_hir::intravisit::nested_filter::{self as hir_nested_filter, NestedFilter}; use rustc_hir::intravisit::{ - walk_fn_decl, walk_generic_arg, walk_generic_param, walk_generics, walk_impl_item_ref, walk_item, walk_param_bound, + walk_fn_decl, walk_generic_param, walk_generics, walk_impl_item_ref, walk_item, walk_param_bound, walk_poly_trait_ref, walk_trait_ref, walk_ty, Visitor, }; -use rustc_hir::lang_items; use rustc_hir::FnRetTy::Return; use rustc_hir::{ - BareFnTy, BodyId, FnDecl, GenericArg, GenericBound, GenericParam, GenericParamKind, Generics, Impl, ImplItem, - ImplItemKind, Item, ItemKind, Lifetime, LifetimeName, LifetimeParamKind, PolyTraitRef, PredicateOrigin, TraitFn, - TraitItem, TraitItemKind, Ty, TyKind, WherePredicate, + lang_items, BareFnTy, BodyId, FnDecl, FnSig, GenericArg, GenericBound, GenericParam, GenericParamKind, Generics, + Impl, ImplItem, ImplItemKind, Item, ItemKind, Lifetime, LifetimeName, LifetimeParamKind, Node, PolyTraitRef, + PredicateOrigin, TraitFn, TraitItem, TraitItemKind, Ty, TyKind, WherePredicate, }; -use rustc_lint::{LateContext, LateLintPass}; +use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::hir::nested_filter as middle_nested_filter; -use rustc_middle::ty::TyCtxt; +use rustc_middle::lint::in_external_macro; use rustc_session::{declare_lint_pass, declare_tool_lint}; use rustc_span::def_id::LocalDefId; use rustc_span::source_map::Span; @@ -34,8 +34,6 @@ declare_clippy_lint! { /// ### Known problems /// - We bail out if the function has a `where` clause where lifetimes /// are mentioned due to potential false positives. - /// - Lifetime bounds such as `impl Foo + 'a` and `T: 'a` must be elided with the - /// placeholder notation `'_` because the fully elided notation leaves the type bound to `'static`. /// /// ### Example /// ```rust @@ -93,7 +91,7 @@ declare_lint_pass!(Lifetimes => [NEEDLESS_LIFETIMES, EXTRA_UNUSED_LIFETIMES]); impl<'tcx> LateLintPass<'tcx> for Lifetimes { fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx Item<'_>) { if let ItemKind::Fn(ref sig, generics, id) = item.kind { - check_fn_inner(cx, sig.decl, Some(id), None, generics, item.span, true); + check_fn_inner(cx, sig, Some(id), None, generics, item.span, true); } else if let ItemKind::Impl(impl_) = item.kind { if !item.span.from_expansion() { report_extra_impl_lifetimes(cx, impl_); @@ -106,7 +104,7 @@ impl<'tcx> LateLintPass<'tcx> for Lifetimes { let report_extra_lifetimes = trait_ref_of_method(cx, item.owner_id.def_id).is_none(); check_fn_inner( cx, - sig.decl, + sig, Some(id), None, item.generics, @@ -122,29 +120,21 @@ impl<'tcx> LateLintPass<'tcx> for Lifetimes { TraitFn::Required(sig) => (None, Some(sig)), TraitFn::Provided(id) => (Some(id), None), }; - check_fn_inner(cx, sig.decl, body, trait_sig, item.generics, item.span, true); + check_fn_inner(cx, sig, body, trait_sig, item.generics, item.span, true); } } } -/// The lifetime of a &-reference. -#[derive(PartialEq, Eq, Hash, Debug, Clone)] -enum RefLt { - Unnamed, - Static, - Named(LocalDefId), -} - fn check_fn_inner<'tcx>( cx: &LateContext<'tcx>, - decl: &'tcx FnDecl<'_>, + sig: &'tcx FnSig<'_>, body: Option<BodyId>, trait_sig: Option<&[Ident]>, generics: &'tcx Generics<'_>, span: Span, report_extra_lifetimes: bool, ) { - if span.from_expansion() || has_where_lifetimes(cx, generics) { + if in_external_macro(cx.sess(), span) || has_where_lifetimes(cx, generics) { return; } @@ -154,7 +144,11 @@ fn check_fn_inner<'tcx>( .filter(|param| matches!(param.kind, GenericParamKind::Type { .. })); for typ in types { - for pred in generics.bounds_for_param(cx.tcx.hir().local_def_id(typ.hir_id)) { + if !typ.span.eq_ctxt(span) { + return; + } + + for pred in generics.bounds_for_param(typ.def_id) { if pred.origin == PredicateOrigin::WhereClause { // has_where_lifetimes checked that this predicate contains no lifetime. continue; @@ -163,7 +157,7 @@ fn check_fn_inner<'tcx>( for bound in pred.bounds { let mut visitor = RefVisitor::new(cx); walk_param_bound(&mut visitor, bound); - if visitor.lts.iter().any(|lt| matches!(lt, RefLt::Named(_))) { + if visitor.lts.iter().any(|lt| matches!(lt.res, LifetimeName::Param(_))) { return; } if let GenericBound::Trait(ref trait_ref, _) = *bound { @@ -190,12 +184,16 @@ fn check_fn_inner<'tcx>( } } - if let Some(elidable_lts) = could_use_elision(cx, decl, body, trait_sig, generics.params) { + if let Some((elidable_lts, usages)) = could_use_elision(cx, sig.decl, body, trait_sig, generics.params) { + if usages.iter().any(|usage| !usage.ident.span.eq_ctxt(span)) { + return; + } + let lts = elidable_lts .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().get_by_def_id(def_id).ident()) .map(|ident| ident.to_string()) .collect::<Vec<_>>() .join(", "); @@ -203,21 +201,99 @@ fn check_fn_inner<'tcx>( span_lint_and_then( cx, NEEDLESS_LIFETIMES, - span.with_hi(decl.output.span().hi()), + span.with_hi(sig.decl.output.span().hi()), &format!("the following explicit lifetimes could be elided: {lts}"), |diag| { - if let Some(span) = elidable_lts.iter().find_map(|&(_, span)| span) { - diag.span_help(span, "replace with `'_` in generic arguments such as here"); + if sig.header.is_async() { + // async functions have usages whose spans point at the lifetime declaration which messes up + // suggestions + return; + }; + + if let Some(suggestions) = elision_suggestions(cx, generics, &elidable_lts, &usages) { + diag.multipart_suggestion("elide the lifetimes", suggestions, Applicability::MachineApplicable); } }, ); } if report_extra_lifetimes { - self::report_extra_lifetimes(cx, decl, generics); + self::report_extra_lifetimes(cx, sig.decl, generics); } } +fn elision_suggestions( + cx: &LateContext<'_>, + generics: &Generics<'_>, + elidable_lts: &[LocalDefId], + usages: &[Lifetime], +) -> Option<Vec<(Span, String)>> { + let explicit_params = generics + .params + .iter() + .filter(|param| !param.is_elided_lifetime() && !param.is_impl_trait()) + .collect::<Vec<_>>(); + + let mut suggestions = if elidable_lts.len() == explicit_params.len() { + // if all the params are elided remove the whole generic block + // + // fn x<'a>() {} + // ^^^^ + vec![(generics.span, String::new())] + } else { + elidable_lts + .iter() + .map(|&id| { + let pos = explicit_params.iter().position(|param| param.def_id == id)?; + let param = explicit_params.get(pos)?; + + let span = if let Some(next) = explicit_params.get(pos + 1) { + // fn x<'prev, 'a, 'next>() {} + // ^^^^ + param.span.until(next.span) + } else { + // `pos` should be at least 1 here, because the param in position 0 would either have a `next` + // param or would have taken the `elidable_lts.len() == explicit_params.len()` branch. + let prev = explicit_params.get(pos - 1)?; + + // fn x<'prev, 'a>() {} + // ^^^^ + param.span.with_lo(prev.span.hi()) + }; + + Some((span, String::new())) + }) + .collect::<Option<Vec<_>>>()? + }; + + suggestions.extend( + usages + .iter() + .filter(|usage| named_lifetime(usage).map_or(false, |id| elidable_lts.contains(&id))) + .map(|usage| { + match cx.tcx.hir().get_parent(usage.hir_id) { + Node::Ty(Ty { + kind: TyKind::Ref(..), .. + }) => { + // expand `&'a T` to `&'a T` + // ^^ ^^^ + let span = cx + .sess() + .source_map() + .span_extend_while(usage.ident.span, |ch| ch.is_ascii_whitespace()) + .unwrap_or(usage.ident.span); + + (span, String::new()) + }, + // `T<'a>` and `impl Foo + 'a` should be replaced by `'_` + _ => (usage.ident.span, String::from("'_")), + } + }), + ); + + Some(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! { @@ -237,13 +313,20 @@ fn explicit_self_type<'tcx>(cx: &LateContext<'tcx>, func: &FnDecl<'tcx>, ident: } } +fn named_lifetime(lt: &Lifetime) -> Option<LocalDefId> { + match lt.res { + LifetimeName::Param(id) if !lt.is_anonymous() => Some(id), + _ => None, + } +} + fn could_use_elision<'tcx>( cx: &LateContext<'tcx>, func: &'tcx FnDecl<'_>, body: Option<BodyId>, trait_sig: Option<&[Ident]>, named_generics: &'tcx [GenericParam<'_>], -) -> Option<Vec<(LocalDefId, Option<Span>)>> { +) -> Option<(Vec<LocalDefId>, Vec<Lifetime>)> { // There are two scenarios where elision works: // * no output references, all input references have different LT // * output references, exactly one input reference with same LT @@ -251,7 +334,7 @@ fn could_use_elision<'tcx>( // level of the current item. // check named LTs - let allowed_lts = allowed_lts_from(cx.tcx, named_generics); + let allowed_lts = allowed_lts_from(named_generics); // these will collect all the lifetimes for references in arg/return types let mut input_visitor = RefVisitor::new(cx); @@ -301,32 +384,24 @@ fn could_use_elision<'tcx>( // check for lifetimes from higher scopes for lt in input_lts.iter().chain(output_lts.iter()) { - if !allowed_lts.contains(lt) { + if let Some(id) = named_lifetime(lt) + && !allowed_lts.contains(&id) + { return None; } } // check for higher-ranked trait bounds if !input_visitor.nested_elision_site_lts.is_empty() || !output_visitor.nested_elision_site_lts.is_empty() { - let allowed_lts: FxHashSet<_> = allowed_lts - .iter() - .filter_map(|lt| match lt { - RefLt::Named(def_id) => Some(cx.tcx.item_name(def_id.to_def_id())), - _ => None, - }) - .collect(); + let allowed_lts: FxHashSet<_> = allowed_lts.iter().map(|id| cx.tcx.item_name(id.to_def_id())).collect(); for lt in input_visitor.nested_elision_site_lts { - if let RefLt::Named(def_id) = lt { - if allowed_lts.contains(&cx.tcx.item_name(def_id.to_def_id())) { - return None; - } + if allowed_lts.contains(<.ident.name) { + return None; } } for lt in output_visitor.nested_elision_site_lts { - if let RefLt::Named(def_id) = lt { - if allowed_lts.contains(&cx.tcx.item_name(def_id.to_def_id())) { - return None; - } + if allowed_lts.contains(<.ident.name) { + return None; } } } @@ -338,15 +413,10 @@ fn could_use_elision<'tcx>( let elidable_lts = named_lifetime_occurrences(&input_lts) .into_iter() .filter_map(|(def_id, occurrences)| { - if occurrences == 1 && (input_lts.len() == 1 || !output_lts.contains(&RefLt::Named(def_id))) { - Some(( - def_id, - input_visitor - .lifetime_generic_arg_spans - .get(&def_id) - .or_else(|| output_visitor.lifetime_generic_arg_spans.get(&def_id)) - .copied(), - )) + if occurrences == 1 + && (input_lts.len() == 1 || !output_lts.iter().any(|lt| named_lifetime(lt) == Some(def_id))) + { + Some(def_id) } else { None } @@ -354,31 +424,34 @@ fn could_use_elision<'tcx>( .collect::<Vec<_>>(); if elidable_lts.is_empty() { - None - } else { - Some(elidable_lts) + return None; } + + let usages = itertools::chain(input_lts, output_lts).collect(); + + Some((elidable_lts, usages)) } -fn allowed_lts_from(tcx: TyCtxt<'_>, named_generics: &[GenericParam<'_>]) -> FxHashSet<RefLt> { - let mut allowed_lts = FxHashSet::default(); - for par in named_generics.iter() { - if let GenericParamKind::Lifetime { .. } = par.kind { - allowed_lts.insert(RefLt::Named(tcx.hir().local_def_id(par.hir_id))); - } - } - allowed_lts.insert(RefLt::Unnamed); - allowed_lts.insert(RefLt::Static); - allowed_lts +fn allowed_lts_from(named_generics: &[GenericParam<'_>]) -> FxHashSet<LocalDefId> { + named_generics + .iter() + .filter_map(|par| { + if let GenericParamKind::Lifetime { .. } = par.kind { + Some(par.def_id) + } else { + None + } + }) + .collect() } /// Number of times each named lifetime occurs in the given slice. Returns a vector to preserve /// relative order. #[must_use] -fn named_lifetime_occurrences(lts: &[RefLt]) -> Vec<(LocalDefId, usize)> { +fn named_lifetime_occurrences(lts: &[Lifetime]) -> Vec<(LocalDefId, usize)> { let mut occurrences = Vec::new(); for lt in lts { - if let &RefLt::Named(curr_def_id) = lt { + if let Some(curr_def_id) = named_lifetime(lt) { if let Some(pair) = occurrences .iter_mut() .find(|(prev_def_id, _)| *prev_def_id == curr_def_id) @@ -392,12 +465,10 @@ fn named_lifetime_occurrences(lts: &[RefLt]) -> Vec<(LocalDefId, usize)> { occurrences } -/// A visitor usable for `rustc_front::visit::walk_ty()`. struct RefVisitor<'a, 'tcx> { cx: &'a LateContext<'tcx>, - lts: Vec<RefLt>, - lifetime_generic_arg_spans: FxHashMap<LocalDefId, Span>, - nested_elision_site_lts: Vec<RefLt>, + lts: Vec<Lifetime>, + nested_elision_site_lts: Vec<Lifetime>, unelided_trait_object_lifetime: bool, } @@ -406,32 +477,16 @@ impl<'a, 'tcx> RefVisitor<'a, 'tcx> { Self { cx, lts: Vec::new(), - lifetime_generic_arg_spans: FxHashMap::default(), nested_elision_site_lts: Vec::new(), unelided_trait_object_lifetime: false, } } - fn record(&mut self, lifetime: &Option<Lifetime>) { - if let Some(ref lt) = *lifetime { - if lt.is_static() { - self.lts.push(RefLt::Static); - } else if lt.is_anonymous() { - // Fresh lifetimes generated should be ignored. - self.lts.push(RefLt::Unnamed); - } else if let LifetimeName::Param(def_id) = lt.res { - self.lts.push(RefLt::Named(def_id)); - } - } else { - self.lts.push(RefLt::Unnamed); - } - } - - fn all_lts(&self) -> Vec<RefLt> { + fn all_lts(&self) -> Vec<Lifetime> { self.lts .iter() .chain(self.nested_elision_site_lts.iter()) - .cloned() + .copied() .collect::<Vec<_>>() } @@ -443,7 +498,7 @@ impl<'a, 'tcx> RefVisitor<'a, 'tcx> { impl<'a, 'tcx> Visitor<'tcx> for RefVisitor<'a, 'tcx> { // for lifetimes as parameters of generics fn visit_lifetime(&mut self, lifetime: &'tcx Lifetime) { - self.record(&Some(*lifetime)); + self.lts.push(*lifetime); } fn visit_poly_trait_ref(&mut self, poly_tref: &'tcx PolyTraitRef<'tcx>) { @@ -468,11 +523,7 @@ impl<'a, 'tcx> Visitor<'tcx> for RefVisitor<'a, 'tcx> { walk_item(self, item); self.lts.truncate(len); self.lts.extend(bounds.iter().filter_map(|bound| match bound { - GenericArg::Lifetime(l) => Some(if let LifetimeName::Param(def_id) = l.res { - RefLt::Named(def_id) - } else { - RefLt::Unnamed - }), + GenericArg::Lifetime(&l) => Some(l), _ => None, })); }, @@ -492,13 +543,6 @@ impl<'a, 'tcx> Visitor<'tcx> for RefVisitor<'a, 'tcx> { _ => walk_ty(self, ty), } } - - fn visit_generic_arg(&mut self, generic_arg: &'tcx GenericArg<'tcx>) { - if let GenericArg::Lifetime(l) = generic_arg && let LifetimeName::Param(def_id) = l.res { - self.lifetime_generic_arg_spans.entry(def_id).or_insert(l.ident.span); - } - walk_generic_arg(self, generic_arg); - } } /// Are any lifetimes mentioned in the `where` clause? If so, we don't try to @@ -516,14 +560,18 @@ fn has_where_lifetimes<'tcx>(cx: &LateContext<'tcx>, generics: &'tcx Generics<'_ return true; } // if the bounds define new lifetimes, they are fine to occur - let allowed_lts = allowed_lts_from(cx.tcx, pred.bound_generic_params); + let allowed_lts = allowed_lts_from(pred.bound_generic_params); // now walk the bounds for bound in pred.bounds.iter() { walk_param_bound(&mut visitor, bound); } // and check that all lifetimes are allowed - if visitor.all_lts().iter().any(|it| !allowed_lts.contains(it)) { - return true; + for lt in visitor.all_lts() { + if let Some(id) = named_lifetime(<) + && !allowed_lts.contains(&id) + { + return true; + } } }, WherePredicate::EqPredicate(ref pred) => { diff --git a/src/tools/clippy/clippy_lints/src/literal_representation.rs b/src/tools/clippy/clippy_lints/src/literal_representation.rs index 3a7b7835c..dadcd9c51 100644 --- a/src/tools/clippy/clippy_lints/src/literal_representation.rs +++ b/src/tools/clippy/clippy_lints/src/literal_representation.rs @@ -210,7 +210,7 @@ impl WarningType { cx, UNUSUAL_BYTE_GROUPINGS, span, - "digits of hex or binary literal not grouped by four", + "digits of hex, binary or octal literal not in groups of equal size", "consider", suggested_format, Applicability::MachineApplicable, @@ -427,8 +427,12 @@ impl LiteralDigitGrouping { let first = groups.next().expect("At least one group"); - if (radix == Radix::Binary || radix == Radix::Hexadecimal) && groups.any(|i| i != 4 && i != 2) { - return Err(WarningType::UnusualByteGroupings); + if radix == Radix::Binary || radix == Radix::Octal || radix == Radix::Hexadecimal { + if let Some(second_size) = groups.next() { + if !groups.all(|i| i == second_size) || first > second_size { + return Err(WarningType::UnusualByteGroupings); + } + } } if let Some(second) = groups.next() { @@ -484,7 +488,7 @@ impl DecimalLiteralRepresentation { then { let hex = format!("{val:#X}"); let num_lit = NumericLiteral::new(&hex, num_lit.suffix, false); - let _ = Self::do_lint(num_lit.integer).map_err(|warning_type| { + 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_iter_loop.rs b/src/tools/clippy/clippy_lints/src/loops/explicit_iter_loop.rs index b1f294162..151c7f1d5 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 @@ -68,7 +68,7 @@ fn is_iterable_array<'tcx>(ty: Ty<'tcx>, cx: &LateContext<'tcx>) -> bool { // IntoIterator is currently only implemented for array sizes <= 32 in rustc match ty.kind() { ty::Array(_, n) => n - .try_eval_usize(cx.tcx, cx.param_env) + .try_eval_target_usize(cx.tcx, cx.param_env) .map_or(false, |val| (0..=32).contains(&val)), _ => false, } diff --git a/src/tools/clippy/clippy_lints/src/loops/mod.rs b/src/tools/clippy/clippy_lints/src/loops/mod.rs index 8e52cac43..610a0233e 100644 --- a/src/tools/clippy/clippy_lints/src/loops/mod.rs +++ b/src/tools/clippy/clippy_lints/src/loops/mod.rs @@ -61,7 +61,8 @@ declare_clippy_lint! { /// /// ### Why is this bad? /// Just iterating the collection itself makes the intent - /// more clear and is probably faster. + /// more clear and is probably faster because it eliminates + /// the bounds check that is done when indexing. /// /// ### Example /// ```rust 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 3bca93d80..5c317c2a5 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 @@ -149,7 +149,7 @@ pub(super) fn check<'tcx>( |diag| { multispan_sugg( diag, - "consider using an iterator", + "consider using an iterator and enumerate()", vec![ (pat.span, format!("({}, <item>)", ident.name)), ( @@ -211,7 +211,7 @@ fn is_end_eq_array_len<'tcx>( if let ExprKind::Lit(ref 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_usize(cx.tcx, cx.param_env); + 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(), @@ -370,7 +370,7 @@ impl<'a, 'tcx> Visitor<'tcx> for VarVisitor<'a, 'tcx> { ExprKind::MethodCall(_, receiver, args, _) => { let def_id = self.cx.typeck_results().type_dependent_def_id(expr.hir_id).unwrap(); for (ty, expr) in iter::zip( - self.cx.tcx.fn_sig(def_id).inputs().skip_binder(), + self.cx.tcx.fn_sig(def_id).subst_identity().inputs().skip_binder(), std::iter::once(receiver).chain(args.iter()), ) { self.prefer_mutable = false; 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 14f161f51..b1bc10802 100644 --- a/src/tools/clippy/clippy_lints/src/loops/never_loop.rs +++ b/src/tools/clippy/clippy_lints/src/loops/never_loop.rs @@ -39,6 +39,7 @@ pub(super) fn check( }); }, NeverLoopResult::MayContinueMainLoop | NeverLoopResult::Otherwise => (), + NeverLoopResult::IgnoreUntilEnd(_) => unreachable!(), } } @@ -48,6 +49,8 @@ enum NeverLoopResult { AlwaysBreak, // A continue may occur for the main loop. MayContinueMainLoop, + // Ignore everything until the end of the block with this id + IgnoreUntilEnd(HirId), Otherwise, } @@ -56,6 +59,7 @@ fn absorb_break(arg: NeverLoopResult) -> NeverLoopResult { match arg { NeverLoopResult::AlwaysBreak | NeverLoopResult::Otherwise => NeverLoopResult::Otherwise, NeverLoopResult::MayContinueMainLoop => NeverLoopResult::MayContinueMainLoop, + NeverLoopResult::IgnoreUntilEnd(id) => NeverLoopResult::IgnoreUntilEnd(id), } } @@ -63,27 +67,26 @@ fn absorb_break(arg: NeverLoopResult) -> NeverLoopResult { #[must_use] fn combine_seq(first: NeverLoopResult, second: NeverLoopResult) -> NeverLoopResult { match first { - NeverLoopResult::AlwaysBreak | NeverLoopResult::MayContinueMainLoop => first, - NeverLoopResult::Otherwise => second, - } -} - -// Combine two results where both parts are called but not necessarily in order. -#[must_use] -fn combine_both(left: NeverLoopResult, right: NeverLoopResult) -> NeverLoopResult { - match (left, right) { - (NeverLoopResult::MayContinueMainLoop, _) | (_, NeverLoopResult::MayContinueMainLoop) => { - NeverLoopResult::MayContinueMainLoop + NeverLoopResult::AlwaysBreak | NeverLoopResult::MayContinueMainLoop | NeverLoopResult::IgnoreUntilEnd(_) => { + first }, - (NeverLoopResult::AlwaysBreak, _) | (_, NeverLoopResult::AlwaysBreak) => NeverLoopResult::AlwaysBreak, - (NeverLoopResult::Otherwise, NeverLoopResult::Otherwise) => NeverLoopResult::Otherwise, + NeverLoopResult::Otherwise => second, } } // Combine two results where only one of the part may have been executed. #[must_use] -fn combine_branches(b1: NeverLoopResult, b2: NeverLoopResult) -> NeverLoopResult { +fn combine_branches(b1: NeverLoopResult, b2: NeverLoopResult, ignore_ids: &[HirId]) -> NeverLoopResult { match (b1, b2) { + (NeverLoopResult::IgnoreUntilEnd(a), NeverLoopResult::IgnoreUntilEnd(b)) => { + if ignore_ids.iter().find(|&e| e == &a || e == &b).unwrap() == &a { + NeverLoopResult::IgnoreUntilEnd(b) + } else { + NeverLoopResult::IgnoreUntilEnd(a) + } + }, + (i @ NeverLoopResult::IgnoreUntilEnd(_), NeverLoopResult::AlwaysBreak) + | (NeverLoopResult::AlwaysBreak, i @ NeverLoopResult::IgnoreUntilEnd(_)) => i, (NeverLoopResult::AlwaysBreak, NeverLoopResult::AlwaysBreak) => NeverLoopResult::AlwaysBreak, (NeverLoopResult::MayContinueMainLoop, _) | (_, NeverLoopResult::MayContinueMainLoop) => { NeverLoopResult::MayContinueMainLoop @@ -103,7 +106,7 @@ fn never_loop_block(block: &Block<'_>, ignore_ids: &mut Vec<HirId>, main_loop_id let e = never_loop_expr(e, ignore_ids, main_loop_id); // els is an else block in a let...else binding els.map_or(e, |els| { - combine_branches(e, never_loop_block(els, ignore_ids, main_loop_id)) + combine_branches(e, never_loop_block(els, ignore_ids, main_loop_id), ignore_ids) }) }) .fold(NeverLoopResult::Otherwise, combine_seq) @@ -139,7 +142,7 @@ fn never_loop_expr(expr: &Expr<'_>, ignore_ids: &mut Vec<HirId>, main_loop_id: H ExprKind::Struct(_, fields, base) => { let fields = never_loop_expr_all(&mut fields.iter().map(|f| f.expr), ignore_ids, main_loop_id); if let Some(base) = base { - combine_both(fields, never_loop_expr(base, ignore_ids, main_loop_id)) + combine_seq(fields, never_loop_expr(base, ignore_ids, main_loop_id)) } else { fields } @@ -159,7 +162,7 @@ fn never_loop_expr(expr: &Expr<'_>, ignore_ids: &mut Vec<HirId>, main_loop_id: H let e3 = e3.as_ref().map_or(NeverLoopResult::Otherwise, |e| { never_loop_expr(e, ignore_ids, main_loop_id) }); - combine_seq(e1, combine_branches(e2, e3)) + combine_seq(e1, combine_branches(e2, e3, ignore_ids)) }, ExprKind::Match(e, arms, _) => { let e = never_loop_expr(e, ignore_ids, main_loop_id); @@ -175,8 +178,13 @@ fn never_loop_expr(expr: &Expr<'_>, ignore_ids: &mut Vec<HirId>, main_loop_id: H ignore_ids.push(b.hir_id); } let ret = never_loop_block(b, ignore_ids, main_loop_id); - ignore_ids.pop(); - ret + if l.is_some() { + ignore_ids.pop(); + } + match ret { + NeverLoopResult::IgnoreUntilEnd(a) if a == b.hir_id => NeverLoopResult::Otherwise, + _ => ret, + } }, ExprKind::Continue(d) => { let id = d @@ -190,8 +198,8 @@ fn never_loop_expr(expr: &Expr<'_>, ignore_ids: &mut Vec<HirId>, main_loop_id: H }, // checks if break targets a block instead of a loop ExprKind::Break(Destination { target_id: Ok(t), .. }, e) if ignore_ids.contains(&t) => e - .map_or(NeverLoopResult::Otherwise, |e| { - combine_seq(never_loop_expr(e, ignore_ids, main_loop_id), NeverLoopResult::Otherwise) + .map_or(NeverLoopResult::IgnoreUntilEnd(t), |e| { + never_loop_expr(e, ignore_ids, main_loop_id) }), ExprKind::Break(_, e) | ExprKind::Ret(e) => e.as_ref().map_or(NeverLoopResult::AlwaysBreak, |e| { combine_seq( @@ -218,13 +226,13 @@ fn never_loop_expr(expr: &Expr<'_>, ignore_ids: &mut Vec<HirId>, main_loop_id: H | InlineAsmOperand::SymFn { .. } | InlineAsmOperand::SymStatic { .. } => NeverLoopResult::Otherwise, }) - .fold(NeverLoopResult::Otherwise, combine_both), + .fold(NeverLoopResult::Otherwise, combine_seq), ExprKind::Yield(_, _) | ExprKind::Closure { .. } | ExprKind::Path(_) | ExprKind::ConstBlock(_) | ExprKind::Lit(_) - | ExprKind::Err => NeverLoopResult::Otherwise, + | ExprKind::Err(_) => NeverLoopResult::Otherwise, } } @@ -234,7 +242,7 @@ fn never_loop_expr_all<'a, T: Iterator<Item = &'a Expr<'a>>>( main_loop_id: HirId, ) -> NeverLoopResult { es.map(|e| never_loop_expr(e, ignore_ids, main_loop_id)) - .fold(NeverLoopResult::Otherwise, combine_both) + .fold(NeverLoopResult::Otherwise, combine_seq) } fn never_loop_expr_branch<'a, T: Iterator<Item = &'a Expr<'a>>>( @@ -242,8 +250,9 @@ fn never_loop_expr_branch<'a, T: Iterator<Item = &'a Expr<'a>>>( ignore_ids: &mut Vec<HirId>, main_loop_id: HirId, ) -> NeverLoopResult { - e.map(|e| never_loop_expr(e, ignore_ids, main_loop_id)) - .fold(NeverLoopResult::AlwaysBreak, combine_branches) + e.fold(NeverLoopResult::AlwaysBreak, |a, b| { + combine_branches(a, never_loop_expr(b, ignore_ids, main_loop_id), ignore_ids) + }) } fn for_to_if_let_sugg(cx: &LateContext<'_>, iterator: &Expr<'_>, pat: &Pat<'_>) -> String { diff --git a/src/tools/clippy/clippy_lints/src/manual_assert.rs b/src/tools/clippy/clippy_lints/src/manual_assert.rs index 4277455a3..ce5d657bc 100644 --- a/src/tools/clippy/clippy_lints/src/manual_assert.rs +++ b/src/tools/clippy/clippy_lints/src/manual_assert.rs @@ -1,7 +1,6 @@ use crate::rustc_lint::LintContext; use clippy_utils::diagnostics::span_lint_and_then; -use clippy_utils::macros::{root_macro_call, FormatArgsExpn}; -use clippy_utils::source::snippet_with_applicability; +use clippy_utils::macros::root_macro_call; use clippy_utils::{is_else_clause, peel_blocks_with_stmt, span_extract_comment, sugg}; use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind, UnOp}; @@ -38,57 +37,57 @@ declare_lint_pass!(ManualAssert => [MANUAL_ASSERT]); impl<'tcx> LateLintPass<'tcx> for ManualAssert { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &Expr<'tcx>) { - if_chain! { - if let ExprKind::If(cond, then, None) = expr.kind; - if !matches!(cond.kind, ExprKind::Let(_)); - if !expr.span.from_expansion(); - let then = peel_blocks_with_stmt(then); - if let Some(macro_call) = root_macro_call(then.span); - if cx.tcx.item_name(macro_call.def_id) == sym::panic; - if !cx.tcx.sess.source_map().is_multiline(cond.span); - if let Some(format_args) = FormatArgsExpn::find_nested(cx, then, macro_call.expn); + if let ExprKind::If(cond, then, None) = expr.kind + && !matches!(cond.kind, ExprKind::Let(_)) + && !expr.span.from_expansion() + && let then = peel_blocks_with_stmt(then) + && let Some(macro_call) = root_macro_call(then.span) + && cx.tcx.item_name(macro_call.def_id) == sym::panic + && !cx.tcx.sess.source_map().is_multiline(cond.span) + && let Ok(panic_snippet) = cx.sess().source_map().span_to_snippet(macro_call.span) + && let Some(panic_snippet) = panic_snippet.strip_suffix(')') + && let Some((_, format_args_snip)) = panic_snippet.split_once('(') // Don't change `else if foo { panic!(..) }` to `else { assert!(foo, ..) }` as it just // shuffles the condition around. // Should this have a config value? - if !is_else_clause(cx.tcx, expr); - then { - let mut applicability = Applicability::MachineApplicable; - let format_args_snip = snippet_with_applicability(cx, format_args.inputs_span(), "..", &mut applicability); - let cond = cond.peel_drop_temps(); - let mut comments = span_extract_comment(cx.sess().source_map(), expr.span); - if !comments.is_empty() { - comments += "\n"; - } - let (cond, not) = match cond.kind { - ExprKind::Unary(UnOp::Not, e) => (e, ""), - _ => (cond, "!"), - }; - let cond_sugg = sugg::Sugg::hir_with_applicability(cx, cond, "..", &mut applicability).maybe_par(); - let sugg = format!("assert!({not}{cond_sugg}, {format_args_snip});"); - // we show to the user the suggestion without the comments, but when applicating the fix, include the comments in the block - span_lint_and_then( - cx, - MANUAL_ASSERT, - expr.span, - "only a `panic!` in `if`-then statement", - |diag| { - // comments can be noisy, do not show them to the user - if !comments.is_empty() { - diag.tool_only_span_suggestion( - expr.span.shrink_to_lo(), - "add comments back", - comments, - applicability); - } - diag.span_suggestion( - expr.span, - "try instead", - sugg, - applicability); - } - - ); + && !is_else_clause(cx.tcx, expr) + { + let mut applicability = Applicability::MachineApplicable; + let cond = cond.peel_drop_temps(); + let mut comments = span_extract_comment(cx.sess().source_map(), expr.span); + if !comments.is_empty() { + comments += "\n"; } + let (cond, not) = match cond.kind { + ExprKind::Unary(UnOp::Not, e) => (e, ""), + _ => (cond, "!"), + }; + let cond_sugg = sugg::Sugg::hir_with_applicability(cx, cond, "..", &mut applicability).maybe_par(); + let sugg = format!("assert!({not}{cond_sugg}, {format_args_snip});"); + // we show to the user the suggestion without the comments, but when applicating the fix, include the comments in the block + span_lint_and_then( + cx, + MANUAL_ASSERT, + expr.span, + "only a `panic!` in `if`-then statement", + |diag| { + // comments can be noisy, do not show them to the user + if !comments.is_empty() { + diag.tool_only_span_suggestion( + expr.span.shrink_to_lo(), + "add comments back", + comments, + applicability + ); + } + diag.span_suggestion( + expr.span, + "try instead", + sugg, + applicability + ); + } + ); } } } 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 63212beaa..3778eb4c7 100644 --- a/src/tools/clippy/clippy_lints/src/manual_async_fn.rs +++ b/src/tools/clippy/clippy_lints/src/manual_async_fn.rs @@ -6,10 +6,11 @@ use rustc_errors::Applicability; use rustc_hir::intravisit::FnKind; use rustc_hir::{ AsyncGeneratorKind, Block, Body, Closure, Expr, ExprKind, FnDecl, FnRetTy, GeneratorKind, GenericArg, GenericBound, - HirId, ItemKind, LifetimeName, Term, TraitRef, Ty, TyKind, TypeBindingKind, + ItemKind, LifetimeName, Term, TraitRef, Ty, TyKind, TypeBindingKind, }; use rustc_lint::{LateContext, LateLintPass}; use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_span::def_id::LocalDefId; use rustc_span::{sym, Span}; declare_clippy_lint! { @@ -45,7 +46,7 @@ impl<'tcx> LateLintPass<'tcx> for ManualAsyncFn { decl: &'tcx FnDecl<'_>, body: &'tcx Body<'_>, span: Span, - _: HirId, + _: LocalDefId, ) { if_chain! { if let Some(header) = kind.header(); 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 d9ef7dffa..2fd32c009 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 @@ -43,7 +43,7 @@ declare_clippy_lint! { /// 'A'.is_ascii_uppercase(); /// } /// ``` - #[clippy::version = "1.66.0"] + #[clippy::version = "1.67.0"] pub MANUAL_IS_ASCII_CHECK, style, "use dedicated method to check ascii range" 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 9c6f8b43c..98e698c6c 100644 --- a/src/tools/clippy/clippy_lints/src/manual_let_else.rs +++ b/src/tools/clippy/clippy_lints/src/manual_let_else.rs @@ -4,11 +4,12 @@ use clippy_utils::msrvs::{self, Msrv}; use clippy_utils::peel_blocks; use clippy_utils::source::snippet_with_context; use clippy_utils::ty::is_type_diagnostic_item; -use clippy_utils::visitors::{for_each_expr, Descend}; +use clippy_utils::visitors::{Descend, Visitable}; use if_chain::if_chain; use rustc_data_structures::fx::FxHashSet; use rustc_errors::Applicability; -use rustc_hir::{Expr, ExprKind, MatchSource, Pat, PatKind, QPath, Stmt, StmtKind}; +use rustc_hir::intravisit::{walk_expr, Visitor}; +use rustc_hir::{Expr, ExprKind, HirId, ItemId, Local, MatchSource, Pat, PatKind, QPath, Stmt, StmtKind, Ty}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; use rustc_session::{declare_tool_lint, impl_lint_pass}; @@ -115,6 +116,13 @@ impl<'tcx> LateLintPass<'tcx> for ManualLetElse { .enumerate() .find(|(_, arm)| expr_diverges(cx, arm.body) && pat_allowed_for_else(cx, arm.pat, check_types)); let Some((idx, diverging_arm)) = diverging_arm_opt else { return; }; + // If the non-diverging arm is the first one, its pattern can be reused in a let/else statement. + // However, if it arrives in second position, its pattern may cover some cases already covered + // by the diverging one. + // TODO: accept the non-diverging arm as a second position if patterns are disjointed. + if idx == 0 { + return; + } let pat_arm = &arms[1 - idx]; if !expr_is_simple_identity(pat_arm.pat, pat_arm.body) { return; @@ -162,61 +170,102 @@ fn emit_manual_let_else(cx: &LateContext<'_>, span: Span, expr: &Expr<'_>, pat: ); } -fn expr_diverges(cx: &LateContext<'_>, expr: &'_ Expr<'_>) -> bool { - fn is_never(cx: &LateContext<'_>, expr: &'_ Expr<'_>) -> bool { - if let Some(ty) = cx.typeck_results().expr_ty_opt(expr) { - return ty.is_never(); - } - false +/// 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>, } - // 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. - for_each_expr(expr, |ex| { - match ex.kind { - ExprKind::Continue(_) | ExprKind::Break(_, _) | ExprKind::Ret(_) => ControlFlow::Break(()), - ExprKind::Call(call, _) => { - if is_never(cx, ex) || is_never(cx, call) { - return ControlFlow::Break(()); - } - ControlFlow::Continue(Descend::Yes) - }, - ExprKind::MethodCall(..) => { - if is_never(cx, ex) { - return ControlFlow::Break(()); - } - ControlFlow::Continue(Descend::Yes) - }, - ExprKind::If(if_expr, if_then, if_else) => { - let else_diverges = if_else.map_or(false, |ex| expr_diverges(cx, ex)); - let diverges = expr_diverges(cx, if_expr) || (else_diverges && expr_diverges(cx, if_then)); - if diverges { - return ControlFlow::Break(()); + 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(); } - ControlFlow::Continue(Descend::No) - }, - ExprKind::Match(match_expr, match_arms, _) => { - let diverges = expr_diverges(cx, match_expr) - || match_arms.iter().all(|arm| { - let guard_diverges = arm.guard.as_ref().map_or(false, |g| expr_diverges(cx, g.body())); - guard_diverges || expr_diverges(cx, arm.body) - }); - if diverges { - return ControlFlow::Break(()); - } - ControlFlow::Continue(Descend::No) - }, + false + } - // 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), + if self.res.is_break() { + return; + } - // Default: descend - _ => ControlFlow::Continue(Descend::Yes), + // 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); + } } - }) - .is_some() + + // 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 { 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 bca193be9..9a84068d4 100644 --- a/src/tools/clippy/clippy_lints/src/manual_non_exhaustive.rs +++ b/src/tools/clippy/clippy_lints/src/manual_non_exhaustive.rs @@ -157,11 +157,10 @@ impl<'tcx> LateLintPass<'tcx> for ManualNonExhaustiveEnum { && def.variants.len() > 1 { let mut iter = def.variants.iter().filter_map(|v| { - let id = cx.tcx.hir().local_def_id(v.hir_id); - (matches!(v.data, hir::VariantData::Unit(..)) + (matches!(v.data, hir::VariantData::Unit(_, _)) && v.ident.as_str().starts_with('_') && is_doc_hidden(cx.tcx.hir().attrs(v.hir_id))) - .then_some((id, v.span)) + .then_some((v.def_id, v.span)) }); if let Some((id, span)) = iter.next() && iter.next().is_none() 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 59195d1ae..edcab6968 100644 --- a/src/tools/clippy/clippy_lints/src/map_unit_fn.rs +++ b/src/tools/clippy/clippy_lints/src/map_unit_fn.rs @@ -104,7 +104,7 @@ fn is_unit_function(cx: &LateContext<'_>, expr: &hir::Expr<'_>) -> bool { let ty = cx.typeck_results().expr_ty(expr); if let ty::FnDef(id, _) = *ty.kind() { - if let Some(fn_type) = cx.tcx.fn_sig(id).no_bound_vars() { + if let Some(fn_type) = cx.tcx.fn_sig(id).subst_identity().no_bound_vars() { return is_unit_type(fn_type.output()); } } diff --git a/src/tools/clippy/clippy_lints/src/matches/match_wild_enum.rs b/src/tools/clippy/clippy_lints/src/matches/match_wild_enum.rs index 59de8c038..3126b5901 100644 --- a/src/tools/clippy/clippy_lints/src/matches/match_wild_enum.rs +++ b/src/tools/clippy/clippy_lints/src/matches/match_wild_enum.rs @@ -45,8 +45,13 @@ pub(crate) fn check(cx: &LateContext<'_>, ex: &Expr<'_>, arms: &[Arm<'_>]) { // Accumulate the variants which should be put in place of the wildcard because they're not // already covered. - let has_hidden = adt_def.variants().iter().any(|x| is_hidden(cx, x)); - let mut missing_variants: Vec<_> = adt_def.variants().iter().filter(|x| !is_hidden(cx, x)).collect(); + let is_external = adt_def.did().as_local().is_none(); + let has_external_hidden = is_external && adt_def.variants().iter().any(|x| is_hidden(cx, x)); + let mut missing_variants: Vec<_> = adt_def + .variants() + .iter() + .filter(|x| !(is_external && is_hidden(cx, x))) + .collect(); let mut path_prefix = CommonPrefixSearcher::None; for arm in arms { @@ -133,7 +138,7 @@ pub(crate) fn check(cx: &LateContext<'_>, ex: &Expr<'_>, arms: &[Arm<'_>]) { match missing_variants.as_slice() { [] => (), - [x] if !adt_def.is_variant_list_non_exhaustive() && !has_hidden => span_lint_and_sugg( + [x] if !adt_def.is_variant_list_non_exhaustive() && !has_external_hidden => span_lint_and_sugg( cx, MATCH_WILDCARD_FOR_SINGLE_VARIANTS, wildcard_span, @@ -144,7 +149,7 @@ pub(crate) fn check(cx: &LateContext<'_>, ex: &Expr<'_>, arms: &[Arm<'_>]) { ), variants => { let mut suggestions: Vec<_> = variants.iter().copied().map(format_suggestion).collect(); - let message = if adt_def.is_variant_list_non_exhaustive() || has_hidden { + let message = if adt_def.is_variant_list_non_exhaustive() || has_external_hidden { suggestions.push("_".into()); "wildcard matches known variants and will also match future added variants" } else { 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 0aadb482a..d06bcdaa2 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 @@ -10,7 +10,7 @@ pub(crate) fn check(cx: &LateContext<'_>, pat: &Pat<'_>) { 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); + let ty = cx.tcx.type_of(def_id).subst_identity(); if let ty::Adt(def, _) = ty.kind(); if def.is_struct() || def.is_union(); if fields.len() == def.non_enum_variant().fields.len(); diff --git a/src/tools/clippy/clippy_lints/src/matches/significant_drop_in_scrutinee.rs b/src/tools/clippy/clippy_lints/src/matches/significant_drop_in_scrutinee.rs index f587c69f7..b33a24781 100644 --- a/src/tools/clippy/clippy_lints/src/matches/significant_drop_in_scrutinee.rs +++ b/src/tools/clippy/clippy_lints/src/matches/significant_drop_in_scrutinee.rs @@ -341,7 +341,7 @@ impl<'a, 'tcx> Visitor<'tcx> for SigDropHelper<'a, 'tcx> { ExprKind::ConstBlock(_) | ExprKind::Continue(_) | ExprKind::DropTemps(_) | - ExprKind::Err | + ExprKind::Err(_) | ExprKind::InlineAsm(_) | ExprKind::Let(_) | ExprKind::Lit(_) | 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 89aaad359..46a20ad41 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 @@ -17,7 +17,7 @@ pub(super) fn check<'tcx>( 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).is_str(); + if cx.tcx.type_of(impl_id).subst_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 { diff --git a/src/tools/clippy/clippy_lints/src/methods/bytes_nth.rs b/src/tools/clippy/clippy_lints/src/methods/bytes_nth.rs index d512cc4ee..c5fc145b2 100644 --- a/src/tools/clippy/clippy_lints/src/methods/bytes_nth.rs +++ b/src/tools/clippy/clippy_lints/src/methods/bytes_nth.rs @@ -5,6 +5,8 @@ use rustc_errors::Applicability; use rustc_hir::{Expr, LangItem}; use rustc_lint::LateContext; +use crate::methods::method_call; + use super::BYTES_NTH; pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, expr: &Expr<'_>, recv: &'tcx Expr<'tcx>, n_arg: &'tcx Expr<'tcx>) { @@ -16,18 +18,32 @@ pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, expr: &Expr<'_>, recv: &'tcx E } else { return; }; + let mut applicability = Applicability::MachineApplicable; - span_lint_and_sugg( - cx, - BYTES_NTH, - expr.span, - &format!("called `.bytes().nth()` on a `{caller_type}`"), - "try", - format!( - "{}.as_bytes().get({})", - snippet_with_applicability(cx, recv.span, "..", &mut applicability), - snippet_with_applicability(cx, n_arg.span, "..", &mut applicability) - ), - applicability, - ); + let receiver = snippet_with_applicability(cx, recv.span, "..", &mut applicability); + let n = snippet_with_applicability(cx, n_arg.span, "..", &mut applicability); + + if let Some(parent) = clippy_utils::get_parent_expr(cx, expr) + && let Some((name, _, _, _, _)) = method_call(parent) + && name == "unwrap" { + span_lint_and_sugg( + cx, + BYTES_NTH, + parent.span, + &format!("called `.bytes().nth().unwrap()` on a `{caller_type}`"), + "try", + format!("{receiver}.as_bytes()[{n}]",), + applicability + ); + } else { + span_lint_and_sugg( + cx, + BYTES_NTH, + expr.span, + &format!("called `.bytes().nth()` on a `{caller_type}`"), + "try", + format!("{receiver}.as_bytes().get({n}).copied()"), + 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 0b3bf2274..7711aa78b 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 @@ -30,7 +30,7 @@ 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).is_str(); + if cx.tcx.type_of(impl_id).subst_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(); diff --git a/src/tools/clippy/clippy_lints/src/methods/collapsible_str_replace.rs b/src/tools/clippy/clippy_lints/src/methods/collapsible_str_replace.rs index ac61b4377..5e01ed90f 100644 --- a/src/tools/clippy/clippy_lints/src/methods/collapsible_str_replace.rs +++ b/src/tools/clippy/clippy_lints/src/methods/collapsible_str_replace.rs @@ -54,7 +54,7 @@ fn collect_replace_calls<'tcx>( from_args.push_front(from); ControlFlow::Continue(()) } else { - ControlFlow::BREAK + ControlFlow::Break(()) } } else { ControlFlow::Continue(()) 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 a9189b31c..a22285058 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 @@ -33,7 +33,7 @@ pub(super) fn check<'tcx>( if (method_name.ident.name == sym::as_str || method_name.ident.name == sym::as_ref) && { let arg_type = cx.typeck_results().expr_ty(receiver); let base_type = arg_type.peel_refs(); - *base_type.kind() == ty::Str || is_type_lang_item(cx, base_type, hir::LangItem::String) + base_type.is_str() || is_type_lang_item(cx, base_type, hir::LangItem::String) } { receiver } else { @@ -54,7 +54,7 @@ pub(super) fn check<'tcx>( return false; } if let ty::Ref(_, ty, ..) = arg_ty.kind() { - if *ty.kind() == ty::Str && can_be_static_str(cx, arg) { + if ty.is_str() && can_be_static_str(cx, arg) { return false; } }; @@ -70,7 +70,7 @@ pub(super) fn check<'tcx>( if let hir::ExprKind::Path(ref p) = fun.kind { match cx.qpath_res(p, fun.hir_id) { hir::def::Res::Def(hir::def::DefKind::Fn | hir::def::DefKind::AssocFn, def_id) => matches!( - cx.tcx.fn_sig(def_id).output().skip_binder().kind(), + cx.tcx.fn_sig(def_id).subst_identity().output().skip_binder().kind(), ty::Ref(re, ..) if re.is_static(), ), _ => false, @@ -84,7 +84,7 @@ pub(super) fn check<'tcx>( .type_dependent_def_id(arg.hir_id) .map_or(false, |method_id| { matches!( - cx.tcx.fn_sig(method_id).output().skip_binder().kind(), + cx.tcx.fn_sig(method_id).subst_identity().output().skip_binder().kind(), ty::Ref(re, ..) if re.is_static() ) }) diff --git a/src/tools/clippy/clippy_lints/src/methods/expect_used.rs b/src/tools/clippy/clippy_lints/src/methods/expect_used.rs index cce8f797e..614610335 100644 --- a/src/tools/clippy/clippy_lints/src/methods/expect_used.rs +++ b/src/tools/clippy/clippy_lints/src/methods/expect_used.rs @@ -1,6 +1,6 @@ use clippy_utils::diagnostics::span_lint_and_help; -use clippy_utils::is_in_cfg_test; use clippy_utils::ty::is_type_diagnostic_item; +use clippy_utils::{is_in_cfg_test, is_in_test_function}; use rustc_hir as hir; use rustc_lint::LateContext; use rustc_span::sym; @@ -27,7 +27,7 @@ pub(super) fn check( let method = if is_err { "expect_err" } else { "expect" }; - if allow_expect_in_tests && is_in_cfg_test(cx.tcx, expr.hir_id) { + if allow_expect_in_tests && (is_in_test_function(cx.tcx, expr.hir_id) || is_in_cfg_test(cx.tcx, expr.hir_id)) { return; } 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 cb17af608..945bbf53b 100644 --- a/src/tools/clippy/clippy_lints/src/methods/get_first.rs +++ b/src/tools/clippy/clippy_lints/src/methods/get_first.rs @@ -19,7 +19,7 @@ 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).is_slice(); + if cx.tcx.type_of(impl_id).subst_identity().is_slice(); if let Some(_) = is_slice_of_primitives(cx, recv); if let hir::ExprKind::Lit(Spanned { node: LitKind::Int(0, _), .. }) = arg.kind; then { 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 06ecbce4e..5a78a4168 100644 --- a/src/tools/clippy/clippy_lints/src/methods/implicit_clone.rs +++ b/src/tools/clippy/clippy_lints/src/methods/implicit_clone.rs @@ -53,7 +53,9 @@ pub fn is_clone_like(cx: &LateContext<'_>, method_name: &str, method_def_id: hir "to_vec" => cx .tcx .impl_of_method(method_def_id) - .filter(|&impl_did| cx.tcx.type_of(impl_did).is_slice() && cx.tcx.impl_trait_ref(impl_did).is_none()) + .filter(|&impl_did| { + cx.tcx.type_of(impl_did).subst_identity().is_slice() && cx.tcx.impl_trait_ref(impl_did).is_none() + }) .is_some(), _ => false, } 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 5b758f1e6..b9a0ec779 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 @@ -21,7 +21,7 @@ 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 is_type_diagnostic_item(cx, cx.tcx.type_of(impl_id), sym::Option); + if is_type_diagnostic_item(cx, cx.tcx.type_of(impl_id).subst_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); 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 52cc1e046..2b26ef014 100644 --- a/src/tools/clippy/clippy_lints/src/methods/map_clone.rs +++ b/src/tools/clippy/clippy_lints/src/methods/map_clone.rs @@ -19,7 +19,7 @@ pub(super) fn check(cx: &LateContext<'_>, e: &hir::Expr<'_>, recv: &hir::Expr<'_ 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), sym::Option)) + .map_or(false, |id| is_type_diagnostic_item(cx, cx.tcx.type_of(id).subst_identity(), sym::Option)) || is_diag_trait_item(cx, method_id, sym::Iterator); if let hir::ExprKind::Closure(&hir::Closure{ body, .. }) = arg.kind; then { diff --git a/src/tools/clippy/clippy_lints/src/methods/map_err_ignore.rs b/src/tools/clippy/clippy_lints/src/methods/map_err_ignore.rs index b773b3e42..a5beb291f 100644 --- a/src/tools/clippy/clippy_lints/src/methods/map_err_ignore.rs +++ b/src/tools/clippy/clippy_lints/src/methods/map_err_ignore.rs @@ -9,7 +9,7 @@ use super::MAP_ERR_IGNORE; pub(super) fn check(cx: &LateContext<'_>, e: &Expr<'_>, arg: &Expr<'_>) { if let Some(method_id) = cx.typeck_results().type_dependent_def_id(e.hir_id) && let Some(impl_id) = cx.tcx.impl_of_method(method_id) - && is_type_diagnostic_item(cx, cx.tcx.type_of(impl_id), sym::Result) + && is_type_diagnostic_item(cx, cx.tcx.type_of(impl_id).subst_identity(), sym::Result) && let ExprKind::Closure(&Closure { capture_clause: CaptureBy::Ref, body, diff --git a/src/tools/clippy/clippy_lints/src/methods/mod.rs b/src/tools/clippy/clippy_lints/src/methods/mod.rs index 77be61b47..702df4b28 100644 --- a/src/tools/clippy/clippy_lints/src/methods/mod.rs +++ b/src/tools/clippy/clippy_lints/src/methods/mod.rs @@ -80,6 +80,7 @@ mod skip_while_next; mod stable_sort_primitive; mod str_splitn; mod string_extend_chars; +mod suspicious_command_arg_space; mod suspicious_map; mod suspicious_splitn; mod suspicious_to_owned; @@ -1818,6 +1819,7 @@ declare_clippy_lint! { /// - `or_else` to `or` /// - `get_or_insert_with` to `get_or_insert` /// - `ok_or_else` to `ok_or` + /// - `then` to `then_some` (for msrv >= 1.62.0) /// /// ### Why is this bad? /// Using eager evaluation is shorter and simpler in some cases. @@ -3102,7 +3104,7 @@ declare_clippy_lint! { /// Ok(()) /// } /// ``` - #[clippy::version = "1.66.0"] + #[clippy::version = "1.67.0"] pub SEEK_FROM_CURRENT, complexity, "use dedicated method for seek from current position" @@ -3133,7 +3135,7 @@ declare_clippy_lint! { /// t.rewind(); /// } /// ``` - #[clippy::version = "1.66.0"] + #[clippy::version = "1.67.0"] pub SEEK_TO_START_INSTEAD_OF_REWIND, complexity, "jumping to the start of stream using `seek` method" @@ -3161,6 +3163,32 @@ declare_clippy_lint! { "collecting an iterator when collect is not needed" } +declare_clippy_lint! { + /// ### What it does + /// + /// Checks for `Command::arg()` invocations that look like they + /// should be multiple arguments instead, such as `arg("-t ext2")`. + /// + /// ### Why is this bad? + /// + /// `Command::arg()` does not split arguments by space. An argument like `arg("-t ext2")` + /// will be passed as a single argument to the command, + /// which is likely not what was intended. + /// + /// ### Example + /// ```rust + /// std::process::Command::new("echo").arg("-n hello").spawn().unwrap(); + /// ``` + /// Use instead: + /// ```rust + /// std::process::Command::new("echo").args(["-n", "hello"]).spawn().unwrap(); + /// ``` + #[clippy::version = "1.67.0"] + pub SUSPICIOUS_COMMAND_ARG_SPACE, + suspicious, + "single command line argument that looks like it should be multiple arguments" +} + pub struct Methods { avoid_breaking_exported_api: bool, msrv: Msrv, @@ -3288,6 +3316,7 @@ impl_lint_pass!(Methods => [ SEEK_FROM_CURRENT, SEEK_TO_START_INSTEAD_OF_REWIND, NEEDLESS_COLLECT, + SUSPICIOUS_COMMAND_ARG_SPACE, ]); /// Extracts a method call name, args, and `Span` of the method name. @@ -3348,11 +3377,11 @@ impl<'tcx> LateLintPass<'tcx> for Methods { let name = impl_item.ident.name.as_str(); let parent = cx.tcx.hir().get_parent_item(impl_item.hir_id()).def_id; let item = cx.tcx.hir().expect_item(parent); - let self_ty = cx.tcx.type_of(item.owner_id); + let self_ty = cx.tcx.type_of(item.owner_id).subst_identity(); 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); + let method_sig = cx.tcx.fn_sig(impl_item.owner_id).subst_identity(); let method_sig = cx.tcx.erase_late_bound_regions(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 @@ -3412,7 +3441,7 @@ impl<'tcx> LateLintPass<'tcx> for Methods { } if let hir::ImplItemKind::Fn(_, _) = impl_item.kind { - let ret_ty = return_ty(cx, impl_item.hir_id()); + let ret_ty = return_ty(cx, impl_item.owner_id); if contains_ty_adt_constructor_opaque(cx, ret_ty, self_ty) { return; @@ -3460,7 +3489,7 @@ impl<'tcx> LateLintPass<'tcx> for Methods { if_chain! { if item.ident.name == sym::new; if let TraitItemKind::Fn(_, _) = item.kind; - let ret_ty = return_ty(cx, item.hir_id()); + let ret_ty = return_ty(cx, item.owner_id); let self_ty = TraitRef::identity(cx.tcx, item.owner_id.to_def_id()) .self_ty() .skip_binder(); @@ -3495,6 +3524,9 @@ impl Methods { unnecessary_lazy_eval::check(cx, expr, recv, arg, "and"); } }, + ("arg", [arg]) => { + suspicious_command_arg_space::check(cx, recv, arg, span); + } ("as_deref" | "as_deref_mut", []) => { needless_option_as_deref::check(cx, expr, recv, name); }, 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 b9593b368..d0aa39d06 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 @@ -15,7 +15,7 @@ pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, ex: &'tcx Expr<'tcx>, recv: &' 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), sym::Mutex); + if is_type_diagnostic_item(cx, cx.tcx.type_of(impl_id).subst_identity(), sym::Mutex); then { span_lint_and_sugg( cx, 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 f4d3ef3b7..0b0c6adc5 100644 --- a/src/tools/clippy/clippy_lints/src/methods/needless_collect.rs +++ b/src/tools/clippy/clippy_lints/src/methods/needless_collect.rs @@ -137,7 +137,7 @@ pub(super) fn check<'tcx>( /// Checks if the given method call matches the expected signature of `([&[mut]] self) -> bool` fn is_is_empty_sig(cx: &LateContext<'_>, call_id: HirId) -> bool { cx.typeck_results().type_dependent_def_id(call_id).map_or(false, |id| { - let sig = cx.tcx.fn_sig(id).skip_binder(); + let sig = cx.tcx.fn_sig(id).subst_identity().skip_binder(); sig.inputs().len() == 1 && sig.output().is_bool() }) } @@ -165,7 +165,7 @@ fn iterates_same_ty<'tcx>(cx: &LateContext<'tcx>, iter_ty: Ty<'tcx>, collect_ty: fn is_contains_sig(cx: &LateContext<'_>, call_id: HirId, iter_expr: &Expr<'_>) -> bool { let typeck = cx.typeck_results(); if let Some(id) = typeck.type_dependent_def_id(call_id) - && let sig = cx.tcx.fn_sig(id) + && let sig = cx.tcx.fn_sig(id).subst_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() @@ -173,7 +173,7 @@ fn is_contains_sig(cx: &LateContext<'_>, call_id: HirId, iter_expr: &Expr<'_>) - && let Some(iter_item) = cx.tcx .associated_items(iter_trait) .find_by_name_and_kind(cx.tcx, Ident::with_dummy_span(Symbol::intern("Item")), AssocKind::Type, iter_trait) - && let substs = cx.tcx.mk_substs([GenericArg::from(typeck.expr_ty_adjusted(iter_expr))].into_iter()) + && let substs = cx.tcx.mk_substs(&[GenericArg::from(typeck.expr_ty_adjusted(iter_expr))]) && let proj_ty = cx.tcx.mk_projection(iter_item.def_id, substs) && let Ok(item_ty) = cx.tcx.try_normalize_erasing_regions(cx.param_env, proj_ty) { diff --git a/src/tools/clippy/clippy_lints/src/methods/open_options.rs b/src/tools/clippy/clippy_lints/src/methods/open_options.rs index 597af853d..c6a27cdd6 100644 --- a/src/tools/clippy/clippy_lints/src/methods/open_options.rs +++ b/src/tools/clippy/clippy_lints/src/methods/open_options.rs @@ -11,7 +11,7 @@ use super::NONSENSICAL_OPEN_OPTIONS; pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, e: &'tcx Expr<'_>, recv: &'tcx Expr<'_>) { if let Some(method_id) = cx.typeck_results().type_dependent_def_id(e.hir_id) && let Some(impl_id) = cx.tcx.impl_of_method(method_id) - && match_type(cx, cx.tcx.type_of(impl_id), &paths::OPEN_OPTIONS) + && match_type(cx, cx.tcx.type_of(impl_id).subst_identity(), &paths::OPEN_OPTIONS) { let mut options = Vec::new(); get_open_options(cx, recv, &mut options); 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 0cc28c0dc..e3f2de3cd 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 @@ -14,7 +14,7 @@ pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>, arg: &'t 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), sym::PathBuf); + if is_type_diagnostic_item(cx, cx.tcx.type_of(impl_id).subst_identity(), sym::PathBuf); if let ExprKind::Lit(ref lit) = arg.kind; if let LitKind::Str(ref path_lit, _) = lit.node; if let pushed_path = Path::new(path_lit.as_str()); 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 1c031ad6a..afdb8ce94 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 @@ -8,7 +8,6 @@ use rustc_errors::Applicability; use rustc_hir as hir; use rustc_hir::PatKind; use rustc_lint::LateContext; -use rustc_middle::ty; use rustc_span::source_map::Span; use rustc_span::symbol::sym; @@ -108,7 +107,7 @@ pub(super) fn check<'tcx>( if is_type_lang_item(cx, self_ty, hir::LangItem::String) { true } else { - *self_ty.kind() == ty::Str + self_ty.is_str() } }; if_chain! { 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 4221c52d5..4d704ec39 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 @@ -47,7 +47,7 @@ pub(super) fn check( for &(method, pos) in &PATTERN_METHODS { if_chain! { if let ty::Ref(_, ty, _) = cx.typeck_results().expr_ty_adjusted(receiver).kind(); - if *ty.kind() == ty::Str; + if ty.is_str(); if method_name.as_str() == method && args.len() > pos; let arg = &args[pos]; let mut applicability = Applicability::MachineApplicable; diff --git a/src/tools/clippy/clippy_lints/src/methods/stable_sort_primitive.rs b/src/tools/clippy/clippy_lints/src/methods/stable_sort_primitive.rs index 09c8ca4cb..b5fd0ad8c 100644 --- a/src/tools/clippy/clippy_lints/src/methods/stable_sort_primitive.rs +++ b/src/tools/clippy/clippy_lints/src/methods/stable_sort_primitive.rs @@ -10,7 +10,7 @@ use super::STABLE_SORT_PRIMITIVE; pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, e: &'tcx Expr<'_>, recv: &'tcx Expr<'_>) { if let Some(method_id) = cx.typeck_results().type_dependent_def_id(e.hir_id) && let Some(impl_id) = cx.tcx.impl_of_method(method_id) - && cx.tcx.type_of(impl_id).is_slice() + && cx.tcx.type_of(impl_id).subst_identity().is_slice() && let Some(slice_type) = is_slice_of_primitives(cx, recv) { span_lint_and_then( diff --git a/src/tools/clippy/clippy_lints/src/methods/string_extend_chars.rs b/src/tools/clippy/clippy_lints/src/methods/string_extend_chars.rs index f35d81cee..2c20c6d75 100644 --- a/src/tools/clippy/clippy_lints/src/methods/string_extend_chars.rs +++ b/src/tools/clippy/clippy_lints/src/methods/string_extend_chars.rs @@ -5,7 +5,6 @@ use clippy_utils::ty::is_type_lang_item; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_lint::LateContext; -use rustc_middle::ty; use super::STRING_EXTEND_CHARS; @@ -17,7 +16,7 @@ pub(super) fn check(cx: &LateContext<'_>, expr: &hir::Expr<'_>, recv: &hir::Expr if let Some(arglists) = method_chain_args(arg, &["chars"]) { let target = &arglists[0].0; let self_ty = cx.typeck_results().expr_ty(target).peel_refs(); - let ref_str = if *self_ty.kind() == ty::Str { + let ref_str = if self_ty.is_str() { if matches!(target.kind, hir::ExprKind::Index(..)) { "&" } else { diff --git a/src/tools/clippy/clippy_lints/src/methods/suspicious_command_arg_space.rs b/src/tools/clippy/clippy_lints/src/methods/suspicious_command_arg_space.rs new file mode 100644 index 000000000..73632c5a3 --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/methods/suspicious_command_arg_space.rs @@ -0,0 +1,39 @@ +use clippy_utils::diagnostics::span_lint_and_then; +use clippy_utils::paths; +use clippy_utils::ty::match_type; +use rustc_ast as ast; +use rustc_errors::{Applicability, Diagnostic}; +use rustc_hir as hir; +use rustc_lint::LateContext; +use rustc_span::Span; + +use super::SUSPICIOUS_COMMAND_ARG_SPACE; + +pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, recv: &'tcx hir::Expr<'_>, arg: &'tcx hir::Expr<'_>, span: Span) { + let ty = cx.typeck_results().expr_ty(recv).peel_refs(); + + if match_type(cx, ty, &paths::STD_PROCESS_COMMAND) + && let hir::ExprKind::Lit(lit) = &arg.kind + && let ast::LitKind::Str(s, _) = &lit.node + && let Some((arg1, arg2)) = s.as_str().split_once(' ') + && arg1.starts_with('-') + && arg1.chars().all(|c| c.is_ascii_alphanumeric() || c == '_' || c == '-') + { + span_lint_and_then( + cx, + SUSPICIOUS_COMMAND_ARG_SPACE, + arg.span, + "single argument that looks like it should be multiple arguments", + |diag: &mut Diagnostic| { + diag.multipart_suggestion_verbose( + "consider splitting the argument", + vec![ + (span, "args".to_string()), + (arg.span, format!("[{arg1:?}, {arg2:?}]")), + ], + Applicability::MaybeIncorrect, + ); + } + ); + } +} 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 2ac0786b3..0dc7fe2a2 100644 --- a/src/tools/clippy/clippy_lints/src/methods/suspicious_map.rs +++ b/src/tools/clippy/clippy_lints/src/methods/suspicious_map.rs @@ -11,10 +11,8 @@ 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); - let closure = expr_or_init(cx, map_arg); - if let Some(def_id) = cx.tcx.hir().opt_local_def_id(closure.hir_id); - if let Some(body_id) = cx.tcx.hir().maybe_body_owned_by(def_id); - let closure_body = cx.tcx.hir().body(body_id); + 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) { 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 219a9edd6..90ca66bd7 100644 --- a/src/tools/clippy/clippy_lints/src/methods/suspicious_splitn.rs +++ b/src/tools/clippy/clippy_lints/src/methods/suspicious_splitn.rs @@ -13,7 +13,7 @@ pub(super) fn check(cx: &LateContext<'_>, method_name: &str, expr: &Expr<'_>, se 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); + let self_ty = cx.tcx.type_of(impl_id).subst_identity(); if self_ty.is_slice() || self_ty.is_str(); then { // Ignore empty slice and string literals when used with a literal count. 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 fe88fa41f..e818f1892 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 @@ -1,4 +1,4 @@ -use clippy_utils::diagnostics::span_lint_and_sugg; +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; @@ -17,19 +17,31 @@ pub fn check(cx: &LateContext<'_>, expr: &hir::Expr<'_>, recv: &hir::Expr<'_>) - 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_sugg( + 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" )), - "consider using, depending on intent", - format!("{recv_snip}.clone()` or `{recv_snip}.into_owned()"), - app, + |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; } 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 ed5a75b0f..5201da52b 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 @@ -122,7 +122,7 @@ fn detect_lint(cx: &LateContext<'_>, expr: &Expr<'_>, recv: &Expr<'_>, arg: &Exp 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).is_slice(); + if cx.tcx.type_of(impl_id).subst_identity().is_slice(); if let ExprKind::Closure(&Closure { body, .. }) = arg.kind; if let closure_body = cx.tcx.hir().body(body); if let &[ 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 9263f0519..df26b36b7 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 @@ -246,7 +246,7 @@ fn check_other_call_arg<'tcx>( 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_substs_and_args(cx, maybe_call); - let fn_sig = cx.tcx.fn_sig(callee_def_id).skip_binder(); + let fn_sig = cx.tcx.fn_sig(callee_def_id).subst_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); @@ -368,10 +368,9 @@ fn can_change_type<'a>(cx: &LateContext<'a>, mut expr: &'a Expr<'a>, mut ty: Ty< Node::Block(..) => continue, Node::Item(item) => { if let ItemKind::Fn(_, _, body_id) = &item.kind - && let output_ty = return_ty(cx, item.hir_id()) - && let local_def_id = cx.tcx.hir().local_def_id(item.hir_id()) - && Inherited::build(cx.tcx, local_def_id).enter(|inherited| { - let fn_ctxt = FnCtxt::new(inherited, cx.param_env, item.hir_id()); + && let output_ty = return_ty(cx, item.owner_id) + && Inherited::build(cx.tcx, item.owner_id.def_id).enter(|inherited| { + let fn_ctxt = FnCtxt::new(inherited, cx.param_env, item.owner_id.def_id); fn_ctxt.can_coerce(ty, output_ty) }) { if has_lifetime(output_ty) && has_lifetime(ty) { @@ -386,7 +385,7 @@ fn can_change_type<'a>(cx: &LateContext<'a>, mut expr: &'a Expr<'a>, mut ty: Ty< Node::Expr(parent_expr) => { if let Some((callee_def_id, call_substs, recv, call_args)) = get_callee_substs_and_args(cx, parent_expr) { - let fn_sig = cx.tcx.fn_sig(callee_def_id).skip_binder(); + let fn_sig = cx.tcx.fn_sig(callee_def_id).subst_identity().skip_binder(); if let Some(arg_index) = recv.into_iter().chain(call_args).position(|arg| arg.hir_id == expr.hir_id) && let Some(param_ty) = fn_sig.inputs().get(arg_index) && let ty::Param(ParamTy { index: param_index , ..}) = param_ty.kind() @@ -415,7 +414,7 @@ fn can_change_type<'a>(cx: &LateContext<'a>, mut expr: &'a Expr<'a>, mut ty: Ty< } }); - let new_subst = cx.tcx.mk_substs( + let new_subst = cx.tcx.mk_substs_from_iter( call_substs.iter() .enumerate() .map(|(i, t)| diff --git a/src/tools/clippy/clippy_lints/src/methods/unwrap_used.rs b/src/tools/clippy/clippy_lints/src/methods/unwrap_used.rs index 90983f249..5e4c3daee 100644 --- a/src/tools/clippy/clippy_lints/src/methods/unwrap_used.rs +++ b/src/tools/clippy/clippy_lints/src/methods/unwrap_used.rs @@ -1,6 +1,6 @@ use clippy_utils::diagnostics::span_lint_and_help; use clippy_utils::ty::is_type_diagnostic_item; -use clippy_utils::{is_in_cfg_test, is_lint_allowed}; +use clippy_utils::{is_in_cfg_test, is_in_test_function, is_lint_allowed}; use rustc_hir as hir; use rustc_lint::LateContext; use rustc_span::sym; @@ -27,7 +27,7 @@ pub(super) fn check( let method_suffix = if is_err { "_err" } else { "" }; - if allow_unwrap_in_tests && is_in_cfg_test(cx.tcx, expr.hir_id) { + if allow_unwrap_in_tests && (is_in_test_function(cx.tcx, expr.hir_id) || is_in_cfg_test(cx.tcx, expr.hir_id)) { return; } diff --git a/src/tools/clippy/clippy_lints/src/methods/utils.rs b/src/tools/clippy/clippy_lints/src/methods/utils.rs index ae6b165fd..c96d69226 100644 --- a/src/tools/clippy/clippy_lints/src/methods/utils.rs +++ b/src/tools/clippy/clippy_lints/src/methods/utils.rs @@ -22,7 +22,7 @@ pub(super) fn derefs_to_slice<'tcx>( ty::Slice(_) => true, ty::Adt(def, _) if def.is_box() => may_slice(cx, ty.boxed_ty()), ty::Adt(..) => is_type_diagnostic_item(cx, ty, sym::Vec), - ty::Array(_, size) => size.try_eval_usize(cx.tcx, cx.param_env).is_some(), + ty::Array(_, size) => size.try_eval_target_usize(cx.tcx, cx.param_env).is_some(), ty::Ref(_, inner, _) => may_slice(cx, *inner), _ => false, } @@ -143,7 +143,7 @@ impl<'cx, 'tcx> Visitor<'tcx> for CloneOrCopyVisitor<'cx, 'tcx> { 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); + let method_ty = self.cx.tcx.type_of(method_def_id).subst_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 { 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 02d8364cb..b0cfc163f 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 @@ -20,7 +20,7 @@ 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 is_type_diagnostic_item(cx, cx.tcx.type_of(impl_id), sym::Vec); + if is_type_diagnostic_item(cx, cx.tcx.type_of(impl_id).subst_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 { diff --git a/src/tools/clippy/clippy_lints/src/misc.rs b/src/tools/clippy/clippy_lints/src/misc.rs index 9f4beb92b..0705029a6 100644 --- a/src/tools/clippy/clippy_lints/src/misc.rs +++ b/src/tools/clippy/clippy_lints/src/misc.rs @@ -4,12 +4,13 @@ use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::intravisit::FnKind; use rustc_hir::{ - self as hir, def, BinOpKind, BindingAnnotation, Body, ByRef, Expr, ExprKind, FnDecl, HirId, Mutability, PatKind, - Stmt, StmtKind, TyKind, + self as hir, def, BinOpKind, BindingAnnotation, Body, ByRef, Expr, ExprKind, FnDecl, Mutability, PatKind, Stmt, + StmtKind, TyKind, }; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::lint::in_external_macro; use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_span::def_id::LocalDefId; use rustc_span::hygiene::DesugaringKind; use rustc_span::source_map::{ExpnKind, Span}; @@ -151,7 +152,7 @@ impl<'tcx> LateLintPass<'tcx> for LintPass { decl: &'tcx FnDecl<'_>, body: &'tcx Body<'_>, span: Span, - _: HirId, + _: LocalDefId, ) { if let FnKind::Closure = k { // Does not apply to closures 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 5bc04bc17..87bd007a2 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 @@ -6,11 +6,12 @@ use clippy_utils::{fn_has_unsatisfiable_preds, is_entrypoint_fn, is_from_proc_ma use rustc_hir as hir; use rustc_hir::def_id::CRATE_DEF_ID; use rustc_hir::intravisit::FnKind; -use rustc_hir::{Body, Constness, FnDecl, GenericParamKind, HirId}; +use rustc_hir::{Body, Constness, FnDecl, GenericParamKind}; use rustc_hir_analysis::hir_ty_to_ty; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::lint::in_external_macro; use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_span::def_id::LocalDefId; use rustc_span::Span; declare_clippy_lint! { @@ -91,14 +92,12 @@ impl<'tcx> LateLintPass<'tcx> for MissingConstForFn { _: &FnDecl<'_>, body: &Body<'tcx>, span: Span, - hir_id: HirId, + def_id: LocalDefId, ) { if !self.msrv.meets(msrvs::CONST_IF_MATCH) { return; } - let def_id = cx.tcx.hir().local_def_id(hir_id); - if in_external_macro(cx.tcx.sess, span) || is_entrypoint_fn(cx, def_id.to_def_id()) { return; } @@ -132,6 +131,8 @@ impl<'tcx> LateLintPass<'tcx> for MissingConstForFn { FnKind::Closure => return, } + let hir_id = cx.tcx.hir().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; diff --git a/src/tools/clippy/clippy_lints/src/missing_doc.rs b/src/tools/clippy/clippy_lints/src/missing_doc.rs index 6fd100762..9659ca8ce 100644 --- a/src/tools/clippy/clippy_lints/src/missing_doc.rs +++ b/src/tools/clippy/clippy_lints/src/missing_doc.rs @@ -8,10 +8,12 @@ use clippy_utils::attrs::is_doc_hidden; use clippy_utils::diagnostics::span_lint; use clippy_utils::is_from_proc_macro; +use hir::def_id::LocalDefId; +use if_chain::if_chain; use rustc_ast::ast::{self, MetaItem, MetaItemKind}; use rustc_hir as hir; use rustc_lint::{LateContext, LateLintPass, LintContext}; -use rustc_middle::ty::DefIdTree; +use rustc_middle::ty::{DefIdTree, Visibility}; use rustc_session::{declare_tool_lint, impl_lint_pass}; use rustc_span::def_id::CRATE_DEF_ID; use rustc_span::source_map::Span; @@ -34,6 +36,9 @@ declare_clippy_lint! { } pub struct MissingDoc { + /// Whether to **only** check for missing documentation in items visible within the current + /// crate. For example, `pub(crate)` items. + crate_items_only: bool, /// Stack of whether #[doc(hidden)] is set /// at each level which has lint attributes. doc_hidden_stack: Vec<bool>, @@ -42,14 +47,15 @@ pub struct MissingDoc { impl Default for MissingDoc { #[must_use] fn default() -> Self { - Self::new() + Self::new(false) } } impl MissingDoc { #[must_use] - pub fn new() -> Self { + pub fn new(crate_items_only: bool) -> Self { Self { + crate_items_only, doc_hidden_stack: vec![false], } } @@ -75,6 +81,7 @@ impl MissingDoc { fn check_missing_docs_attrs( &self, cx: &LateContext<'_>, + def_id: LocalDefId, attrs: &[ast::Attribute], sp: Span, article: &'static str, @@ -95,6 +102,13 @@ impl MissingDoc { return; } + if self.crate_items_only && def_id != CRATE_DEF_ID { + let vis = cx.tcx.visibility(def_id); + if vis == Visibility::Public || vis != Visibility::Restricted(CRATE_DEF_ID.into()) { + return; + } + } + let has_doc = attrs .iter() .any(|a| a.doc_str().is_some() || Self::has_include(a.meta())); @@ -123,7 +137,7 @@ impl<'tcx> LateLintPass<'tcx> for MissingDoc { fn check_crate(&mut self, cx: &LateContext<'tcx>) { let attrs = cx.tcx.hir().attrs(hir::CRATE_HIR_ID); - self.check_missing_docs_attrs(cx, attrs, cx.tcx.def_span(CRATE_DEF_ID), "the", "crate"); + self.check_missing_docs_attrs(cx, CRATE_DEF_ID, attrs, cx.tcx.def_span(CRATE_DEF_ID), "the", "crate"); } fn check_item(&mut self, cx: &LateContext<'tcx>, it: &'tcx hir::Item<'_>) { @@ -159,7 +173,7 @@ impl<'tcx> LateLintPass<'tcx> for MissingDoc { let attrs = cx.tcx.hir().attrs(it.hir_id()); if !is_from_proc_macro(cx, it) { - self.check_missing_docs_attrs(cx, attrs, it.span, article, desc); + self.check_missing_docs_attrs(cx, it.owner_id.def_id, attrs, it.span, article, desc); } } @@ -168,7 +182,7 @@ impl<'tcx> LateLintPass<'tcx> for MissingDoc { let attrs = cx.tcx.hir().attrs(trait_item.hir_id()); if !is_from_proc_macro(cx, trait_item) { - self.check_missing_docs_attrs(cx, attrs, trait_item.span, article, desc); + self.check_missing_docs_attrs(cx, trait_item.owner_id.def_id, attrs, trait_item.span, article, desc); } } @@ -185,7 +199,7 @@ impl<'tcx> LateLintPass<'tcx> for MissingDoc { let (article, desc) = cx.tcx.article_and_description(impl_item.owner_id.to_def_id()); let attrs = cx.tcx.hir().attrs(impl_item.hir_id()); if !is_from_proc_macro(cx, impl_item) { - self.check_missing_docs_attrs(cx, attrs, impl_item.span, article, desc); + self.check_missing_docs_attrs(cx, impl_item.owner_id.def_id, attrs, impl_item.span, article, desc); } } @@ -193,7 +207,7 @@ impl<'tcx> LateLintPass<'tcx> for MissingDoc { if !sf.is_positional() { let attrs = cx.tcx.hir().attrs(sf.hir_id); if !is_from_proc_macro(cx, sf) { - self.check_missing_docs_attrs(cx, attrs, sf.span, "a", "struct field"); + self.check_missing_docs_attrs(cx, sf.def_id, attrs, sf.span, "a", "struct field"); } } } @@ -201,7 +215,7 @@ impl<'tcx> LateLintPass<'tcx> for MissingDoc { fn check_variant(&mut self, cx: &LateContext<'tcx>, v: &'tcx hir::Variant<'_>) { let attrs = cx.tcx.hir().attrs(v.hir_id); if !is_from_proc_macro(cx, v) { - self.check_missing_docs_attrs(cx, attrs, v.span, "a", "variant"); + self.check_missing_docs_attrs(cx, v.def_id, attrs, v.span, "a", "variant"); } } } 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 3371b4cce..e99081ad0 100644 --- a/src/tools/clippy/clippy_lints/src/missing_trait_methods.rs +++ b/src/tools/clippy/clippy_lints/src/missing_trait_methods.rs @@ -94,7 +94,7 @@ impl<'tcx> LateLintPass<'tcx> for MissingTraitMethods { "implement the method", ); } - }) + }); } } } diff --git a/src/tools/clippy/clippy_lints/src/module_style.rs b/src/tools/clippy/clippy_lints/src/module_style.rs index 0742943df..349fcd227 100644 --- a/src/tools/clippy/clippy_lints/src/module_style.rs +++ b/src/tools/clippy/clippy_lints/src/module_style.rs @@ -134,7 +134,7 @@ fn process_paths_for_mod_files<'a>( mod_folders: &mut FxHashSet<&'a OsStr>, ) { let mut comp = path.components().rev().peekable(); - let _ = comp.next(); + let _: Option<_> = comp.next(); if path.ends_with("mod.rs") { mod_folders.insert(comp.peek().map(|c| c.as_os_str()).unwrap_or_default()); } 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 new file mode 100644 index 000000000..63c575fca --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/multiple_unsafe_ops_per_block.rs @@ -0,0 +1,186 @@ +use clippy_utils::{ + diagnostics::span_lint_and_then, + visitors::{for_each_expr_with_closures, Descend, Visitable}, +}; +use core::ops::ControlFlow::Continue; +use hir::{ + def::{DefKind, Res}, + BlockCheckMode, ExprKind, QPath, UnOp, Unsafety, +}; +use rustc_ast::Mutability; +use rustc_hir as hir; +use rustc_lint::{LateContext, LateLintPass}; +use rustc_middle::lint::in_external_macro; +use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_span::Span; + +declare_clippy_lint! { + /// ### What it does + /// Checks for `unsafe` blocks that contain more than one unsafe operation. + /// + /// ### Why is this bad? + /// Combined with `undocumented_unsafe_blocks`, + /// this lint ensures that each unsafe operation must be independently justified. + /// Combined with `unused_unsafe`, this lint also ensures + /// elimination of unnecessary unsafe blocks through refactoring. + /// + /// ### Example + /// ```rust + /// /// Reads a `char` from the given pointer. + /// /// + /// /// # Safety + /// /// + /// /// `ptr` must point to four consecutive, initialized bytes which + /// /// form a valid `char` when interpreted in the native byte order. + /// fn read_char(ptr: *const u8) -> char { + /// // SAFETY: The caller has guaranteed that the value pointed + /// // to by `bytes` is a valid `char`. + /// unsafe { char::from_u32_unchecked(*ptr.cast::<u32>()) } + /// } + /// ``` + /// Use instead: + /// ```rust + /// /// Reads a `char` from the given pointer. + /// /// + /// /// # Safety + /// /// + /// /// - `ptr` must be 4-byte aligned, point to four consecutive + /// /// initialized bytes, and be valid for reads of 4 bytes. + /// /// - The bytes pointed to by `ptr` must represent a valid + /// /// `char` when interpreted in the native byte order. + /// fn read_char(ptr: *const u8) -> char { + /// // SAFETY: `ptr` is 4-byte aligned, points to four consecutive + /// // initialized bytes, and is valid for reads of 4 bytes. + /// let int_value = unsafe { *ptr.cast::<u32>() }; + /// + /// // SAFETY: The caller has guaranteed that the four bytes + /// // pointed to by `bytes` represent a valid `char`. + /// unsafe { char::from_u32_unchecked(int_value) } + /// } + /// ``` + #[clippy::version = "1.68.0"] + pub MULTIPLE_UNSAFE_OPS_PER_BLOCK, + restriction, + "more than one unsafe operation per `unsafe` block" +} +declare_lint_pass!(MultipleUnsafeOpsPerBlock => [MULTIPLE_UNSAFE_OPS_PER_BLOCK]); + +impl<'tcx> LateLintPass<'tcx> for MultipleUnsafeOpsPerBlock { + fn check_block(&mut self, cx: &LateContext<'tcx>, block: &'tcx hir::Block<'_>) { + if !matches!(block.rules, BlockCheckMode::UnsafeBlock(_)) || in_external_macro(cx.tcx.sess, block.span) { + return; + } + let mut unsafe_ops = vec![]; + collect_unsafe_exprs(cx, block, &mut unsafe_ops); + if unsafe_ops.len() > 1 { + span_lint_and_then( + cx, + MULTIPLE_UNSAFE_OPS_PER_BLOCK, + block.span, + &format!( + "this `unsafe` block contains {} unsafe operations, expected only one", + unsafe_ops.len() + ), + |diag| { + for (msg, span) in unsafe_ops { + diag.span_note(span, msg); + } + }, + ); + } + } +} + +fn collect_unsafe_exprs<'tcx>( + cx: &LateContext<'tcx>, + node: impl Visitable<'tcx>, + unsafe_ops: &mut Vec<(&'static str, Span)>, +) { + for_each_expr_with_closures(cx, node, |expr| { + match expr.kind { + ExprKind::InlineAsm(_) => unsafe_ops.push(("inline assembly used here", expr.span)), + + ExprKind::Field(e, _) => { + if cx.typeck_results().expr_ty(e).is_union() { + unsafe_ops.push(("union field access occurs here", expr.span)); + } + }, + + ExprKind::Path(QPath::Resolved( + _, + hir::Path { + res: Res::Def(DefKind::Static(Mutability::Mut), _), + .. + }, + )) => { + unsafe_ops.push(("access of a mutable static occurs here", expr.span)); + }, + + ExprKind::Unary(UnOp::Deref, e) if cx.typeck_results().expr_ty_adjusted(e).is_unsafe_ptr() => { + unsafe_ops.push(("raw pointer dereference occurs here", expr.span)); + }, + + ExprKind::Call(path_expr, _) => match path_expr.kind { + ExprKind::Path(QPath::Resolved( + _, + hir::Path { + res: Res::Def(kind, def_id), + .. + }, + )) if kind.is_fn_like() => { + let sig = cx.tcx.fn_sig(*def_id); + if sig.0.unsafety() == Unsafety::Unsafe { + unsafe_ops.push(("unsafe function call occurs here", expr.span)); + } + }, + + ExprKind::Path(QPath::TypeRelative(..)) => { + if let Some(sig) = cx + .typeck_results() + .type_dependent_def_id(path_expr.hir_id) + .map(|def_id| cx.tcx.fn_sig(def_id)) + { + if sig.0.unsafety() == Unsafety::Unsafe { + unsafe_ops.push(("unsafe function call occurs here", expr.span)); + } + } + }, + + _ => {}, + }, + + ExprKind::MethodCall(..) => { + if let Some(sig) = cx + .typeck_results() + .type_dependent_def_id(expr.hir_id) + .map(|def_id| cx.tcx.fn_sig(def_id)) + { + if sig.0.unsafety() == Unsafety::Unsafe { + unsafe_ops.push(("unsafe method call occurs here", expr.span)); + } + } + }, + + ExprKind::AssignOp(_, lhs, rhs) | ExprKind::Assign(lhs, rhs, _) => { + if matches!( + lhs.kind, + ExprKind::Path(QPath::Resolved( + _, + hir::Path { + res: Res::Def(DefKind::Static(Mutability::Mut), _), + .. + } + )) + ) { + unsafe_ops.push(("modification of a mutable static occurs here", expr.span)); + collect_unsafe_exprs(cx, rhs, unsafe_ops); + return Continue(Descend::No); + } + }, + + _ => {}, + }; + + Continue::<(), _>(Descend::Yes) + }); +} diff --git a/src/tools/clippy/clippy_lints/src/mut_key.rs b/src/tools/clippy/clippy_lints/src/mut_key.rs index a651020ca..8aa814b74 100644 --- a/src/tools/clippy/clippy_lints/src/mut_key.rs +++ b/src/tools/clippy/clippy_lints/src/mut_key.rs @@ -3,9 +3,10 @@ use clippy_utils::{def_path_def_ids, trait_ref_of_method}; use rustc_data_structures::fx::FxHashSet; use rustc_hir as hir; use rustc_lint::{LateContext, LateLintPass}; -use rustc_middle::ty::TypeVisitable; +use rustc_middle::ty::TypeVisitableExt; use rustc_middle::ty::{Adt, Array, Ref, Slice, Tuple, Ty}; use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_span::def_id::LocalDefId; use rustc_span::source_map::Span; use rustc_span::symbol::sym; use std::iter; @@ -102,21 +103,21 @@ impl<'tcx> LateLintPass<'tcx> for MutableKeyType { fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx hir::Item<'tcx>) { if let hir::ItemKind::Fn(ref sig, ..) = item.kind { - self.check_sig(cx, item.hir_id(), sig.decl); + self.check_sig(cx, item.owner_id.def_id, sig.decl); } } fn check_impl_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx hir::ImplItem<'tcx>) { if let hir::ImplItemKind::Fn(ref sig, ..) = item.kind { if trait_ref_of_method(cx, item.owner_id.def_id).is_none() { - self.check_sig(cx, item.hir_id(), sig.decl); + self.check_sig(cx, item.owner_id.def_id, sig.decl); } } } fn check_trait_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx hir::TraitItem<'tcx>) { if let hir::TraitItemKind::Fn(ref sig, ..) = item.kind { - self.check_sig(cx, item.hir_id(), sig.decl); + self.check_sig(cx, item.owner_id.def_id, sig.decl); } } @@ -136,9 +137,8 @@ impl MutableKeyType { } } - fn check_sig(&self, cx: &LateContext<'_>, item_hir_id: hir::HirId, decl: &hir::FnDecl<'_>) { - let fn_def_id = cx.tcx.hir().local_def_id(item_hir_id); - let fn_sig = cx.tcx.fn_sig(fn_def_id); + fn check_sig(&self, cx: &LateContext<'_>, fn_def_id: LocalDefId, decl: &hir::FnDecl<'_>) { + let fn_sig = cx.tcx.fn_sig(fn_def_id).subst_identity(); for (hir_ty, ty) in iter::zip(decl.inputs, fn_sig.inputs().skip_binder()) { self.check_ty_(cx, hir_ty.span, *ty); } @@ -166,7 +166,8 @@ impl MutableKeyType { Ref(_, inner_ty, mutbl) => mutbl == hir::Mutability::Mut || self.is_interior_mutable_type(cx, inner_ty), Slice(inner_ty) => self.is_interior_mutable_type(cx, inner_ty), Array(inner_ty, size) => { - size.try_eval_usize(cx.tcx, cx.param_env).map_or(true, |u| u != 0) + size.try_eval_target_usize(cx.tcx, cx.param_env) + .map_or(true, |u| u != 0) && self.is_interior_mutable_type(cx, inner_ty) }, Tuple(fields) => fields.iter().any(|ty| self.is_interior_mutable_type(cx, ty)), diff --git a/src/tools/clippy/clippy_lints/src/mut_reference.rs b/src/tools/clippy/clippy_lints/src/mut_reference.rs index 4547ed7ea..e91aac41b 100644 --- a/src/tools/clippy/clippy_lints/src/mut_reference.rs +++ b/src/tools/clippy/clippy_lints/src/mut_reference.rs @@ -52,7 +52,7 @@ impl<'tcx> LateLintPass<'tcx> for UnnecessaryMutPassed { ExprKind::MethodCall(path, receiver, arguments, _) => { let def_id = cx.typeck_results().type_dependent_def_id(e.hir_id).unwrap(); let substs = cx.typeck_results().node_substs(e.hir_id); - let method_type = cx.tcx.bound_type_of(def_id).subst(cx.tcx, substs); + let method_type = cx.tcx.type_of(def_id).subst(cx.tcx, substs); check_arguments( cx, std::iter::once(receiver).chain(arguments.iter()).collect(), 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 8c9d4c5cf..1ab81aee7 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 @@ -18,8 +18,9 @@ use rustc_hir_typeck::expr_use_visitor as euv; use rustc_infer::infer::TyCtxtInferExt; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::mir::FakeReadCause; -use rustc_middle::ty::{self, TypeVisitable}; +use rustc_middle::ty::{self, TypeVisitableExt}; use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_span::def_id::LocalDefId; use rustc_span::symbol::kw; use rustc_span::{sym, Span}; use rustc_target::spec::abi::Abi; @@ -82,12 +83,14 @@ impl<'tcx> LateLintPass<'tcx> for NeedlessPassByValue { decl: &'tcx FnDecl<'_>, body: &'tcx Body<'_>, span: Span, - hir_id: HirId, + fn_def_id: LocalDefId, ) { if span.from_expansion() { return; } + let hir_id = cx.tcx.hir().local_def_id_to_hir_id(fn_def_id); + match kind { FnKind::ItemFn(.., header) => { let attrs = cx.tcx.hir().attrs(hir_id); @@ -119,8 +122,6 @@ impl<'tcx> LateLintPass<'tcx> for NeedlessPassByValue { let sized_trait = need!(cx.tcx.lang_items().sized_trait()); - let fn_def_id = cx.tcx.hir().local_def_id(hir_id); - let preds = traits::elaborate_predicates(cx.tcx, cx.param_env.caller_bounds().iter()) .filter(|p| !p.is_global()) .filter_map(|obligation| { @@ -147,8 +148,8 @@ impl<'tcx> LateLintPass<'tcx> for NeedlessPassByValue { ctx }; - let fn_sig = cx.tcx.fn_sig(fn_def_id); - let fn_sig = cx.tcx.erase_late_bound_regions(fn_sig); + let fn_sig = cx.tcx.fn_sig(fn_def_id).subst_identity(); + let fn_sig = cx.tcx.liberate_late_bound_regions(fn_def_id.to_def_id(), fn_sig); for (idx, ((input, &ty), arg)) in decl.inputs.iter().zip(fn_sig.inputs()).zip(body.params).enumerate() { // All spans generated from a proc-macro invocation are the same... 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 54a3c82b7..653b1a8a0 100644 --- a/src/tools/clippy/clippy_lints/src/new_without_default.rs +++ b/src/tools/clippy/clippy_lints/src/new_without_default.rs @@ -75,7 +75,7 @@ impl<'tcx> LateLintPass<'tcx> for NewWithoutDefault { } if let hir::ImplItemKind::Fn(ref sig, _) = impl_item.kind { let name = impl_item.ident.name; - let id = impl_item.hir_id(); + let id = impl_item.owner_id; if sig.header.constness == hir::Constness::Const { // can't be implemented by default return; @@ -97,15 +97,16 @@ impl<'tcx> LateLintPass<'tcx> for NewWithoutDefault { 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); - let self_ty = cx.tcx.type_of(self_def_id); + let self_def_id = cx.tcx.hir().get_parent_item(id.into()); + let self_ty = cx.tcx.type_of(self_def_id).subst_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| { - if let Some(ty_def) = cx.tcx.type_of(d).ty_adt_def() { + let ty = cx.tcx.type_of(d).subst_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)); } @@ -118,7 +119,8 @@ impl<'tcx> LateLintPass<'tcx> for NewWithoutDefault { // generics if_chain! { if let Some(ref impling_types) = self.impling_types; - if let Some(self_def) = cx.tcx.type_of(self_def_id).ty_adt_def(); + let self_def = cx.tcx.type_of(self_def_id).subst_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); @@ -133,7 +135,7 @@ impl<'tcx> LateLintPass<'tcx> for NewWithoutDefault { span_lint_hir_and_then( cx, NEW_WITHOUT_DEFAULT, - id, + id.into(), impl_item.span, &format!( "you should consider adding a `Default` implementation for `{self_type_snip}`" 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 new file mode 100644 index 000000000..bc64ccb29 --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/no_mangle_with_rust_abi.rs @@ -0,0 +1,65 @@ +use clippy_utils::diagnostics::span_lint_and_sugg; +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_target::spec::abi::Abi; + +declare_clippy_lint! { + /// ### What it does + /// Checks for Rust ABI functions with the `#[no_mangle]` attribute. + /// + /// ### Why is this bad? + /// The Rust ABI is not stable, but in many simple cases matches + /// enough with the C ABI that it is possible to forget to add + /// `extern "C"` to a function called from C. Changes to the + /// Rust ABI can break this at any point. + /// + /// ### Example + /// ```rust + /// #[no_mangle] + /// fn example(arg_one: u32, arg_two: usize) {} + /// ``` + /// + /// Use instead: + /// ```rust + /// #[no_mangle] + /// extern "C" fn example(arg_one: u32, arg_two: usize) {} + /// ``` + #[clippy::version = "1.69.0"] + pub NO_MANGLE_WITH_RUST_ABI, + pedantic, + "convert Rust ABI functions to C ABI" +} +declare_lint_pass!(NoMangleWithRustAbi => [NO_MANGLE_WITH_RUST_ABI]); + +impl<'tcx> LateLintPass<'tcx> for NoMangleWithRustAbi { + fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx Item<'tcx>) { + if let ItemKind::Fn(fn_sig, _, _) = &item.kind { + let attrs = cx.tcx.hir().attrs(item.hir_id()); + let mut applicability = Applicability::MachineApplicable; + let snippet = snippet_with_applicability(cx, fn_sig.span, "..", &mut applicability); + for attr in attrs { + if let Some(ident) = attr.ident() + && ident.name == rustc_span::sym::no_mangle + && fn_sig.header.abi == Abi::Rust + && !snippet.contains("extern") { + + let suggestion = snippet.split_once("fn") + .map_or(String::new(), |(first, second)| format!(r#"{first}extern "C" fn{second}"#)); + + span_lint_and_sugg( + cx, + NO_MANGLE_WITH_RUST_ABI, + fn_sig.span, + "attribute #[no_mangle] set on a Rust ABI function", + "try", + suggestion, + applicability + ); + } + } + } + } +} 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 07fd321d6..0bedab05e 100644 --- a/src/tools/clippy/clippy_lints/src/non_copy_const.rs +++ b/src/tools/clippy/clippy_lints/src/non_copy_const.rs @@ -313,7 +313,7 @@ impl<'tcx> LateLintPass<'tcx> for NonCopyConst { // and, in that case, the definition is *not* generic. cx.tcx.normalize_erasing_regions( cx.tcx.param_env(of_trait_def_id), - cx.tcx.type_of(of_assoc_item), + cx.tcx.type_of(of_assoc_item).subst_identity(), ), )) .is_err(); 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 7b1d974f2..8b77a5c99 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 @@ -7,7 +7,7 @@ use rustc_hir::def_id::DefId; 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::subst::{GenericArgKind, SubstsRef}; +use rustc_middle::ty::subst::{EarlyBinder, GenericArgKind, SubstsRef}; use rustc_middle::ty::{self, ConstKind}; use rustc_session::{declare_tool_lint, impl_lint_pass}; use rustc_span::symbol::{kw, Ident}; @@ -244,7 +244,7 @@ impl<'tcx> LateLintPass<'tcx> for OnlyUsedInRecursion { })) => { #[allow(trivial_casts)] if let Some(Node::Item(item)) = get_parent_node(cx.tcx, owner_id.into()) - && let Some(trait_ref) = cx.tcx.impl_trait_ref(item.owner_id).map(|t| t.subst_identity()) + && let Some(trait_ref) = cx.tcx.impl_trait_ref(item.owner_id).map(EarlyBinder::subst_identity) && let Some(trait_item_id) = cx.tcx.associated_item(owner_id).trait_item_def_id { ( 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 cff82b875..87a8a2ed1 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 @@ -1,8 +1,8 @@ use super::ARITHMETIC_SIDE_EFFECTS; use clippy_utils::{ - consts::{constant, constant_simple}, + consts::{constant, constant_simple, Constant}, diagnostics::span_lint, - peel_hir_expr_refs, peel_hir_expr_unary, + is_lint_allowed, peel_hir_expr_refs, peel_hir_expr_unary, }; use rustc_ast as ast; use rustc_data_structures::fx::{FxHashMap, FxHashSet}; @@ -97,17 +97,19 @@ impl ArithmeticSideEffects { self.expr_span = Some(expr.span); } - /// If `expr` is not a literal integer like `1`, returns `None`. + /// Returns the numeric value of a literal integer originated from `expr`, if any. /// - /// Returns the absolute value of the expression, if this is an integer literal. - fn literal_integer(expr: &hir::Expr<'_>) -> Option<u128> { + /// Literal integers can be originated from adhoc declarations like `1`, associated constants + /// like `i32::MAX` or constant references like `N` from `const N: i32 = 1;`, + fn literal_integer(cx: &LateContext<'_>, expr: &hir::Expr<'_>) -> Option<u128> { let actual = peel_hir_expr_unary(expr).0; if let hir::ExprKind::Lit(ref lit) = actual.kind && let ast::LitKind::Int(n, _) = lit.node { - Some(n) + return Some(n) } - else { - None + if let Some((Constant::Int(n), _)) = constant(cx, cx.typeck_results(), expr) { + return Some(n); } + None } /// Manages when the lint should be triggered. Operations in constant environments, hard coded @@ -143,7 +145,10 @@ impl ArithmeticSideEffects { let has_valid_op = if Self::is_integral(lhs_ty) && Self::is_integral(rhs_ty) { let (actual_lhs, lhs_ref_counter) = peel_hir_expr_refs(lhs); let (actual_rhs, rhs_ref_counter) = peel_hir_expr_refs(rhs); - match (Self::literal_integer(actual_lhs), Self::literal_integer(actual_rhs)) { + match ( + Self::literal_integer(cx, actual_lhs), + Self::literal_integer(cx, actual_rhs), + ) { (None, None) => false, (None, Some(n)) | (Some(n), None) => match (&op.node, n) { (hir::BinOpKind::Div | hir::BinOpKind::Rem, 0) => false, @@ -180,20 +185,22 @@ impl ArithmeticSideEffects { return; } let actual_un_expr = peel_hir_expr_refs(un_expr).0; - if Self::literal_integer(actual_un_expr).is_some() { + if Self::literal_integer(cx, actual_un_expr).is_some() { return; } self.issue_lint(cx, expr); } - fn should_skip_expr(&mut self, expr: &hir::Expr<'_>) -> bool { - self.expr_span.is_some() || self.const_span.map_or(false, |sp| sp.contains(expr.span)) + fn should_skip_expr(&mut self, cx: &LateContext<'_>, expr: &hir::Expr<'_>) -> bool { + is_lint_allowed(cx, ARITHMETIC_SIDE_EFFECTS, expr.hir_id) + || self.expr_span.is_some() + || self.const_span.map_or(false, |sp| sp.contains(expr.span)) } } impl<'tcx> LateLintPass<'tcx> for ArithmeticSideEffects { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &hir::Expr<'tcx>) { - if self.should_skip_expr(expr) { + if self.should_skip_expr(cx, expr) { return; } match &expr.kind { @@ -209,7 +216,8 @@ impl<'tcx> LateLintPass<'tcx> for ArithmeticSideEffects { fn check_body(&mut self, cx: &LateContext<'_>, body: &hir::Body<'_>) { let body_owner = cx.tcx.hir().body_owner(body.id()); - let body_owner_def_id = cx.tcx.hir().local_def_id(body_owner); + let body_owner_def_id = cx.tcx.hir().body_owner_def_id(body.id()); + let body_owner_kind = cx.tcx.hir().body_owner_kind(body_owner_def_id); if let hir::BodyOwnerKind::Const | hir::BodyOwnerKind::Static(_) = body_owner_kind { let body_span = cx.tcx.hir().span_with_body(body_owner); diff --git a/src/tools/clippy/clippy_lints/src/operators/cmp_owned.rs b/src/tools/clippy/clippy_lints/src/operators/cmp_owned.rs index 24aeb82a3..d3de9699f 100644 --- a/src/tools/clippy/clippy_lints/src/operators/cmp_owned.rs +++ b/src/tools/clippy/clippy_lints/src/operators/cmp_owned.rs @@ -49,10 +49,10 @@ fn check_op(cx: &LateContext<'_>, expr: &Expr<'_>, other: &Expr<'_>, left: bool) (arg, arg.span) }, ExprKind::Call(path, [arg]) - if path_def_id(cx, path).map_or(false, |id| { - if match_def_path(cx, id, &paths::FROM_STR_METHOD) { + if path_def_id(cx, path).map_or(false, |did| { + if match_def_path(cx, did, &paths::FROM_STR_METHOD) { true - } else if cx.tcx.lang_items().from_fn() == Some(id) { + } else if cx.tcx.is_diagnostic_item(sym::from_fn, did) { !is_copy(cx, typeck.expr_ty(expr)) } else { false diff --git a/src/tools/clippy/clippy_lints/src/operators/numeric_arithmetic.rs b/src/tools/clippy/clippy_lints/src/operators/numeric_arithmetic.rs index 0830a106f..777395f45 100644 --- a/src/tools/clippy/clippy_lints/src/operators/numeric_arithmetic.rs +++ b/src/tools/clippy/clippy_lints/src/operators/numeric_arithmetic.rs @@ -96,7 +96,7 @@ impl Context { pub fn enter_body(&mut self, cx: &LateContext<'_>, body: &hir::Body<'_>) { let body_owner = cx.tcx.hir().body_owner(body.id()); - let body_owner_def_id = cx.tcx.hir().local_def_id(body_owner); + let body_owner_def_id = cx.tcx.hir().body_owner_def_id(body.id()); match cx.tcx.hir().body_owner_kind(body_owner_def_id) { hir::BodyOwnerKind::Static(_) | hir::BodyOwnerKind::Const => { 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 472f52380..c5ea09590 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 @@ -25,11 +25,11 @@ declare_clippy_lint! { /// Using the dedicated functions of the `Option` type is clearer and /// more concise than an `if let` expression. /// - /// ### Known problems - /// This lint uses a deliberately conservative metric for checking - /// if the inside of either body contains breaks or continues which will - /// cause it to not suggest a fix if either block contains a loop with - /// continues or breaks contained within the loop. + /// ### Notes + /// This lint uses a deliberately conservative metric for checking if the + /// inside of either body contains loop control expressions `break` or + /// `continue` (which cannot be used within closures). If these are found, + /// this lint will not be raised. /// /// ### Example /// ```rust 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 efec12489..849cd03dd 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 @@ -8,6 +8,7 @@ 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_span::def_id::LocalDefId; use rustc_span::{sym, Span}; declare_clippy_lint! { @@ -49,9 +50,13 @@ impl<'tcx> LateLintPass<'tcx> for PanicInResultFn { _: &'tcx hir::FnDecl<'tcx>, body: &'tcx hir::Body<'tcx>, span: Span, - hir_id: hir::HirId, + def_id: LocalDefId, ) { - if !matches!(fn_kind, FnKind::Closure) && is_type_diagnostic_item(cx, return_ty(cx, hir_id), sym::Result) { + if matches!(fn_kind, FnKind::Closure) { + return; + } + let owner = cx.tcx.hir().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/pass_by_ref_or_value.rs b/src/tools/clippy/clippy_lints/src/pass_by_ref_or_value.rs index 2d21aaa4f..0d78c3048 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 @@ -12,7 +12,7 @@ use rustc_data_structures::fx::FxHashSet; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_hir::intravisit::FnKind; -use rustc_hir::{BindingAnnotation, Body, FnDecl, HirId, Impl, ItemKind, MutTy, Mutability, Node, PatKind}; +use rustc_hir::{BindingAnnotation, Body, FnDecl, Impl, ItemKind, MutTy, Mutability, Node, PatKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty::adjustment::{Adjust, PointerCast}; use rustc_middle::ty::layout::LayoutOf; @@ -143,7 +143,7 @@ impl<'tcx> PassByRefOrValue { return; } - let fn_sig = cx.tcx.fn_sig(def_id); + let fn_sig = cx.tcx.fn_sig(def_id).subst_identity(); let fn_body = cx.enclosing_body.map(|id| cx.tcx.hir().body(id)); // Gather all the lifetimes found in the output type which may affect whether @@ -272,12 +272,13 @@ impl<'tcx> LateLintPass<'tcx> for PassByRefOrValue { decl: &'tcx FnDecl<'_>, _body: &'tcx Body<'_>, span: Span, - hir_id: HirId, + def_id: LocalDefId, ) { if span.from_expansion() { return; } + let hir_id = cx.tcx.hir().local_def_id_to_hir_id(def_id); match kind { FnKind::ItemFn(.., header) => { if header.abi != Abi::Rust { @@ -308,6 +309,6 @@ impl<'tcx> LateLintPass<'tcx> for PassByRefOrValue { } } - self.check_poly_fn(cx, cx.tcx.hir().local_def_id(hir_id), decl, Some(span)); + self.check_poly_fn(cx, def_id, decl, Some(span)); } } 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 97b5a4ce3..9f98195d3 100644 --- a/src/tools/clippy/clippy_lints/src/pattern_type_mismatch.rs +++ b/src/tools/clippy/clippy_lints/src/pattern_type_mismatch.rs @@ -1,11 +1,10 @@ use clippy_utils::diagnostics::span_lint_and_help; -use rustc_hir::{ - intravisit, Body, Expr, ExprKind, FnDecl, HirId, Let, LocalSource, Mutability, Pat, PatKind, Stmt, StmtKind, -}; +use rustc_hir::{intravisit, Body, Expr, ExprKind, FnDecl, Let, LocalSource, Mutability, Pat, PatKind, 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_span::def_id::LocalDefId; use rustc_span::source_map::Span; declare_clippy_lint! { @@ -116,7 +115,7 @@ impl<'tcx> LateLintPass<'tcx> for PatternTypeMismatch { _: &'tcx FnDecl<'_>, body: &'tcx Body<'_>, _: Span, - _: HirId, + _: LocalDefId, ) { for param in body.params { apply_lint(cx, param.pat, DerefPossible::Impossible); diff --git a/src/tools/clippy/clippy_lints/src/ptr.rs b/src/tools/clippy/clippy_lints/src/ptr.rs index 262953042..fc5509361 100644 --- a/src/tools/clippy/clippy_lints/src/ptr.rs +++ b/src/tools/clippy/clippy_lints/src/ptr.rs @@ -164,7 +164,7 @@ impl<'tcx> LateLintPass<'tcx> for Ptr { check_mut_from_ref(cx, sig, None); for arg in check_fn_args( cx, - cx.tcx.fn_sig(item.owner_id).skip_binder().inputs(), + cx.tcx.fn_sig(item.owner_id).subst_identity().skip_binder().inputs(), sig.decl.inputs, &[], ) @@ -217,7 +217,7 @@ impl<'tcx> LateLintPass<'tcx> for Ptr { check_mut_from_ref(cx, sig, Some(body)); let decl = sig.decl; - let sig = cx.tcx.fn_sig(item_id).skip_binder(); + let sig = cx.tcx.fn_sig(item_id).subst_identity().skip_binder(); let lint_args: Vec<_> = check_fn_args(cx, sig.inputs(), decl.inputs, body.params) .filter(|arg| !is_trait_item || arg.mutability() == Mutability::Not) .collect(); @@ -505,13 +505,13 @@ fn check_mut_from_ref<'tcx>(cx: &LateContext<'tcx>, sig: &FnSig<'_>, body: Optio if let FnRetTy::Return(ty) = sig.decl.output && let Some((out, Mutability::Mut, _)) = get_ref_lm(ty) { - let out_region = cx.tcx.named_region(out.hir_id); + let out_region = cx.tcx.named_bound_var(out.hir_id); let args: Option<Vec<_>> = sig .decl .inputs .iter() .filter_map(get_ref_lm) - .filter(|&(lt, _, _)| cx.tcx.named_region(lt.hir_id) == out_region) + .filter(|&(lt, _, _)| cx.tcx.named_bound_var(lt.hir_id) == out_region) .map(|(_, mutability, span)| (mutability == Mutability::Not).then_some(span)) .collect(); if let Some(args) = args @@ -624,7 +624,10 @@ fn check_ptr_arg_usage<'tcx>(cx: &LateContext<'tcx>, body: &'tcx Body<'_>, args: return; }; - match *self.cx.tcx.fn_sig(id).skip_binder().inputs()[i].peel_refs().kind() { + match *self.cx.tcx.fn_sig(id).subst_identity().skip_binder().inputs()[i] + .peel_refs() + .kind() + { ty::Dynamic(preds, _, _) if !matches_preds(self.cx, args.deref_ty.ty(self.cx), preds) => { set_skip_flag(); }, diff --git a/src/tools/clippy/clippy_lints/src/question_mark_used.rs b/src/tools/clippy/clippy_lints/src/question_mark_used.rs new file mode 100644 index 000000000..9b678e8d7 --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/question_mark_used.rs @@ -0,0 +1,52 @@ +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}; + +declare_clippy_lint! { + /// ### What it does + /// Checks for expressions that use the question mark operator and rejects them. + /// + /// ### Why is this bad? + /// Sometimes code wants to avoid the question mark operator because for instance a local + /// block requires a macro to re-throw errors to attach additional information to the + /// error. + /// + /// ### Example + /// ```ignore + /// let result = expr?; + /// ``` + /// + /// Could be written: + /// + /// ```ignore + /// utility_macro!(expr); + /// ``` + #[clippy::version = "pre 1.29.0"] + pub QUESTION_MARK_USED, + restriction, + "complains if the question mark operator is used" +} + +declare_lint_pass!(QuestionMarkUsed => [QUESTION_MARK_USED]); + +impl<'tcx> LateLintPass<'tcx> for QuestionMarkUsed { + fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) { + if let ExprKind::Match(_, _, MatchSource::TryDesugar) = expr.kind { + if !span_is_local(expr.span) { + return; + } + + span_lint_and_help( + cx, + QUESTION_MARK_USED, + expr.span, + "question mark operator was used", + None, + "consider using a custom macro or match expression", + ); + } + } +} diff --git a/src/tools/clippy/clippy_lints/src/redundant_clone.rs b/src/tools/clippy/clippy_lints/src/redundant_clone.rs index c1677fb3d..944a33cc3 100644 --- a/src/tools/clippy/clippy_lints/src/redundant_clone.rs +++ b/src/tools/clippy/clippy_lints/src/redundant_clone.rs @@ -6,11 +6,12 @@ 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, HirId, LangItem}; +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_span::def_id::LocalDefId; use rustc_span::source_map::{BytePos, Span}; use rustc_span::sym; @@ -69,12 +70,10 @@ impl<'tcx> LateLintPass<'tcx> for RedundantClone { cx: &LateContext<'tcx>, _: FnKind<'tcx>, _: &'tcx FnDecl<'_>, - body: &'tcx Body<'_>, + _: &'tcx Body<'_>, _: Span, - _: HirId, + def_id: LocalDefId, ) { - let def_id = cx.tcx.hir().body_owner_def_id(body.id()); - // Building MIR for `fn`s with unsatisfiable preds results in ICE. if fn_has_unsatisfiable_preds(cx, def_id.to_def_id()) { return; diff --git a/src/tools/clippy/clippy_lints/src/redundant_slicing.rs b/src/tools/clippy/clippy_lints/src/redundant_slicing.rs index 245a02ea2..2fdd775ad 100644 --- a/src/tools/clippy/clippy_lints/src/redundant_slicing.rs +++ b/src/tools/clippy/clippy_lints/src/redundant_slicing.rs @@ -11,8 +11,6 @@ use rustc_middle::ty::adjustment::{Adjust, AutoBorrow, AutoBorrowMutability}; use rustc_middle::ty::subst::GenericArg; use rustc_session::{declare_lint_pass, declare_tool_lint}; -use std::iter; - declare_clippy_lint! { /// ### What it does /// Checks for redundant slicing expressions which use the full range, and @@ -136,7 +134,7 @@ impl<'tcx> LateLintPass<'tcx> for RedundantSlicing { } 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, - cx.tcx.mk_projection(target_id, cx.tcx.mk_substs(iter::once(GenericArg::from(indexed_ty)))), + cx.tcx.mk_projection(target_id, cx.tcx.mk_substs(&[GenericArg::from(indexed_ty)])), ) { if deref_ty == expr_ty { let snip = snippet_with_context(cx, indexed.span, ctxt, "..", &mut app).0; diff --git a/src/tools/clippy/clippy_lints/src/regex.rs b/src/tools/clippy/clippy_lints/src/regex.rs index 1fda58fa5..9e6c6c73d 100644 --- a/src/tools/clippy/clippy_lints/src/regex.rs +++ b/src/tools/clippy/clippy_lints/src/regex.rs @@ -1,5 +1,8 @@ +use std::fmt::Display; + use clippy_utils::consts::{constant, Constant}; use clippy_utils::diagnostics::{span_lint, span_lint_and_help}; +use clippy_utils::source::snippet_opt; use clippy_utils::{match_def_path, paths}; use if_chain::if_chain; use rustc_ast::ast::{LitKind, StrStyle}; @@ -77,13 +80,45 @@ impl<'tcx> LateLintPass<'tcx> for Regex { } } -#[must_use] -fn str_span(base: Span, c: regex_syntax::ast::Span, offset: u8) -> Span { - let offset = u32::from(offset); - let end = base.lo() + BytePos(u32::try_from(c.end.offset).expect("offset too large") + offset); - let start = base.lo() + BytePos(u32::try_from(c.start.offset).expect("offset too large") + offset); - assert!(start <= end); - Span::new(start, end, base.ctxt(), base.parent()) +fn lint_syntax_error(cx: &LateContext<'_>, error: ®ex_syntax::Error, unescaped: &str, base: Span, offset: u8) { + let parts: Option<(_, _, &dyn Display)> = match &error { + regex_syntax::Error::Parse(e) => Some((e.span(), e.auxiliary_span(), e.kind())), + regex_syntax::Error::Translate(e) => Some((e.span(), None, e.kind())), + _ => None, + }; + + let convert_span = |regex_span: ®ex_syntax::ast::Span| { + let offset = u32::from(offset); + let start = base.lo() + BytePos(u32::try_from(regex_span.start.offset).expect("offset too large") + offset); + let end = base.lo() + BytePos(u32::try_from(regex_span.end.offset).expect("offset too large") + offset); + + Span::new(start, end, base.ctxt(), base.parent()) + }; + + if let Some((primary, auxiliary, kind)) = parts + && let Some(literal_snippet) = snippet_opt(cx, base) + && let Some(inner) = literal_snippet.get(offset as usize..) + // Only convert to native rustc spans if the parsed regex matches the + // source snippet exactly, to ensure the span offsets are correct + && inner.get(..unescaped.len()) == Some(unescaped) + { + let spans = if let Some(auxiliary) = auxiliary { + vec![convert_span(primary), convert_span(auxiliary)] + } else { + vec![convert_span(primary)] + }; + + span_lint(cx, INVALID_REGEX, spans, &format!("regex syntax error: {kind}")); + } else { + span_lint_and_help( + cx, + INVALID_REGEX, + base, + &error.to_string(), + None, + "consider using a raw string literal: `r\"..\"`", + ); + } } fn const_str<'tcx>(cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) -> Option<String> { @@ -155,25 +190,7 @@ fn check_regex<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>, utf8: bool) { span_lint_and_help(cx, TRIVIAL_REGEX, expr.span, "trivial regex", None, repl); } }, - Err(regex_syntax::Error::Parse(e)) => { - span_lint( - cx, - INVALID_REGEX, - str_span(expr.span, *e.span(), offset), - &format!("regex syntax error: {}", e.kind()), - ); - }, - Err(regex_syntax::Error::Translate(e)) => { - span_lint( - cx, - INVALID_REGEX, - str_span(expr.span, *e.span(), offset), - &format!("regex syntax error: {}", e.kind()), - ); - }, - Err(e) => { - span_lint(cx, INVALID_REGEX, expr.span, &format!("regex syntax error: {e}")); - }, + Err(e) => lint_syntax_error(cx, &e, r, expr.span, offset), } } } else if let Some(r) = const_str(cx, expr) { @@ -183,25 +200,7 @@ fn check_regex<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>, utf8: bool) { span_lint_and_help(cx, TRIVIAL_REGEX, expr.span, "trivial regex", None, repl); } }, - Err(regex_syntax::Error::Parse(e)) => { - span_lint( - cx, - INVALID_REGEX, - expr.span, - &format!("regex syntax error on position {}: {}", e.span().start.offset, e.kind()), - ); - }, - Err(regex_syntax::Error::Translate(e)) => { - span_lint( - cx, - INVALID_REGEX, - expr.span, - &format!("regex syntax error on position {}: {}", e.span().start.offset, e.kind()), - ); - }, - Err(e) => { - span_lint(cx, INVALID_REGEX, expr.span, &format!("regex syntax error: {e}")); - }, + Err(e) => span_lint(cx, INVALID_REGEX, expr.span, &e.to_string()), } } } 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 b77faf732..bccf421e8 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 @@ -3,7 +3,7 @@ use clippy_utils::ty::is_must_use_ty; use clippy_utils::{nth_arg, return_ty}; use rustc_hir::def_id::LocalDefId; use rustc_hir::intravisit::FnKind; -use rustc_hir::{Body, FnDecl, HirId, TraitItem, TraitItemKind}; +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}; @@ -68,7 +68,7 @@ declare_clippy_lint! { declare_lint_pass!(ReturnSelfNotMustUse => [RETURN_SELF_NOT_MUST_USE]); -fn check_method(cx: &LateContext<'_>, decl: &FnDecl<'_>, fn_def: LocalDefId, span: Span, hir_id: HirId) { +fn check_method(cx: &LateContext<'_>, decl: &FnDecl<'_>, fn_def: LocalDefId, span: Span, owner_id: OwnerId) { if_chain! { // If it comes from an external macro, better ignore it. if !in_external_macro(cx.sess(), span); @@ -76,10 +76,10 @@ fn check_method(cx: &LateContext<'_>, decl: &FnDecl<'_>, fn_def: LocalDefId, spa // We only show this warning for public exported methods. if 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(hir_id).iter().any(|attr| attr.has_name(sym::must_use)); + 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, hir_id); - let self_arg = nth_arg(cx, hir_id, 0); + 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 @@ -109,26 +109,26 @@ impl<'tcx> LateLintPass<'tcx> for ReturnSelfNotMustUse { decl: &'tcx FnDecl<'tcx>, _: &'tcx Body<'tcx>, span: Span, - hir_id: HirId, + fn_def: LocalDefId, ) { if_chain! { // We are only interested in methods, not in functions or associated functions. if matches!(kind, FnKind::Method(_, _)); - if let Some(fn_def) = cx.tcx.hir().opt_local_def_id(hir_id); if 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 { - check_method(cx, decl, fn_def, span, hir_id); + 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()); } } } fn check_trait_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx TraitItem<'tcx>) { if let TraitItemKind::Fn(ref sig, _) = item.kind { - check_method(cx, sig.decl, item.owner_id.def_id, item.span, item.hir_id()); + check_method(cx, sig.decl, item.owner_id.def_id, item.span, item.owner_id); } } } diff --git a/src/tools/clippy/clippy_lints/src/returns.rs b/src/tools/clippy/clippy_lints/src/returns.rs index bbbd9e498..f0d7dd23a 100644 --- a/src/tools/clippy/clippy_lints/src/returns.rs +++ b/src/tools/clippy/clippy_lints/src/returns.rs @@ -1,18 +1,20 @@ use clippy_utils::diagnostics::{span_lint_and_then, span_lint_hir_and_then}; use clippy_utils::source::{snippet_opt, snippet_with_context}; use clippy_utils::visitors::{for_each_expr, Descend}; -use clippy_utils::{fn_def_id, path_to_local_id}; +use clippy_utils::{fn_def_id, 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, HirId, LangItem, MatchSource, PatKind, QPath, StmtKind}; +use rustc_hir::{Block, Body, Expr, ExprKind, FnDecl, LangItem, MatchSource, PatKind, QPath, StmtKind}; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_middle::lint::in_external_macro; use rustc_middle::ty::subst::GenericArgKind; use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_span::def_id::LocalDefId; use rustc_span::source_map::Span; use rustc_span::{BytePos, Pos}; +use std::borrow::Cow; declare_clippy_lint! { /// ### What it does @@ -68,31 +70,41 @@ declare_clippy_lint! { "using a return statement like `return expr;` where an expression would suffice" } -#[derive(PartialEq, Eq, Copy, Clone)] -enum RetReplacement { +#[derive(PartialEq, Eq, Clone)] +enum RetReplacement<'tcx> { Empty, Block, Unit, + IfSequence(Cow<'tcx, str>, Applicability), + Expr(Cow<'tcx, str>, Applicability), } -impl RetReplacement { +impl<'tcx> RetReplacement<'tcx> { fn sugg_help(self) -> &'static str { match self { - Self::Empty => "remove `return`", + Self::Empty | Self::Expr(..) => "remove `return`", Self::Block => "replace `return` with an empty block", Self::Unit => "replace `return` with a unit value", + Self::IfSequence(..) => "remove `return` and wrap the sequence with parentheses", + } + } + fn applicability(&self) -> Option<Applicability> { + match self { + Self::Expr(_, ap) | Self::IfSequence(_, ap) => Some(*ap), + _ => None, } } } -impl ToString for RetReplacement { +impl<'tcx> ToString for RetReplacement<'tcx> { fn to_string(&self) -> String { - match *self { - Self::Empty => "", - Self::Block => "{}", - Self::Unit => "()", + match self { + Self::Empty => String::new(), + Self::Block => "{}".to_string(), + Self::Unit => "()".to_string(), + Self::IfSequence(inner, _) => format!("({inner})"), + Self::Expr(inner, _) => inner.to_string(), } - .to_string() } } @@ -151,8 +163,8 @@ impl<'tcx> LateLintPass<'tcx> for Return { kind: FnKind<'tcx>, _: &'tcx FnDecl<'tcx>, body: &'tcx Body<'tcx>, - _: Span, - _: HirId, + sp: Span, + _: LocalDefId, ) { match kind { FnKind::Closure => { @@ -166,14 +178,14 @@ impl<'tcx> LateLintPass<'tcx> for Return { check_final_expr(cx, body.value, vec![], replacement); }, FnKind::ItemFn(..) | FnKind::Method(..) => { - check_block_return(cx, &body.value.kind, vec![]); + check_block_return(cx, &body.value.kind, sp, vec![]); }, } } } // if `expr` is a block, check if there are needless returns in it -fn check_block_return<'tcx>(cx: &LateContext<'tcx>, expr_kind: &ExprKind<'tcx>, semi_spans: Vec<Span>) { +fn check_block_return<'tcx>(cx: &LateContext<'tcx>, expr_kind: &ExprKind<'tcx>, sp: Span, mut semi_spans: Vec<Span>) { if let ExprKind::Block(block, _) = expr_kind { if let Some(block_expr) = block.expr { check_final_expr(cx, block_expr, semi_spans, RetReplacement::Empty); @@ -183,12 +195,14 @@ fn check_block_return<'tcx>(cx: &LateContext<'tcx>, expr_kind: &ExprKind<'tcx>, check_final_expr(cx, expr, semi_spans, RetReplacement::Empty); }, StmtKind::Semi(semi_expr) => { - let mut semi_spans_and_this_one = semi_spans; - // we only want the span containing the semicolon so we can remove it later. From `entry.rs:382` - if let Some(semicolon_span) = stmt.span.trim_start(semi_expr.span) { - semi_spans_and_this_one.push(semicolon_span); - check_final_expr(cx, semi_expr, semi_spans_and_this_one, RetReplacement::Empty); + // Remove ending semicolons and any whitespace ' ' in between. + // Without `return`, the suggestion might not compile if the semicolon is retained + if let Some(semi_span) = stmt.span.trim_start(semi_expr.span) { + let semi_span_to_remove = + span_find_starting_semi(cx.sess().source_map(), semi_span.with_hi(sp.hi())); + semi_spans.push(semi_span_to_remove); } + check_final_expr(cx, semi_expr, semi_spans, RetReplacement::Empty); }, _ => (), } @@ -201,19 +215,38 @@ fn check_final_expr<'tcx>( expr: &'tcx Expr<'tcx>, semi_spans: Vec<Span>, /* containing all the places where we would need to remove semicolons if finding an * needless return */ - replacement: RetReplacement, + replacement: RetReplacement<'tcx>, ) { let peeled_drop_expr = expr.peel_drop_temps(); match &peeled_drop_expr.kind { // simple return is always "bad" ExprKind::Ret(ref inner) => { - // if desugar of `do yeet`, don't lint - if let Some(inner_expr) = inner - && let ExprKind::Call(path_expr, _) = inner_expr.kind - && let ExprKind::Path(QPath::LangItem(LangItem::TryTraitFromYeet, _, _)) = path_expr.kind - { - return; - } + // check if expr return nothing + let ret_span = if inner.is_none() && replacement == RetReplacement::Empty { + extend_span_to_previous_non_ws(cx, peeled_drop_expr.span) + } else { + peeled_drop_expr.span + }; + + 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 + { + return; + } + + let mut applicability = Applicability::MachineApplicable; + let (snippet, _) = snippet_with_context(cx, inner_expr.span, ret_span.ctxt(), "..", &mut applicability); + if expr_contains_conjunctive_ifs(inner_expr) { + RetReplacement::IfSequence(snippet, applicability) + } else { + RetReplacement::Expr(snippet, applicability) + } + } else { + replacement + }; + if !cx.tcx.hir().attrs(expr.hir_id).is_empty() { return; } @@ -221,19 +254,13 @@ fn check_final_expr<'tcx>( if borrows { return; } - // check if expr return nothing - let ret_span = if inner.is_none() && replacement == RetReplacement::Empty { - extend_span_to_previous_non_ws(cx, peeled_drop_expr.span) - } else { - peeled_drop_expr.span - }; - emit_return_lint(cx, ret_span, semi_spans, inner.as_ref().map(|i| i.span), replacement); + emit_return_lint(cx, ret_span, semi_spans, replacement); }, ExprKind::If(_, then, else_clause_opt) => { - check_block_return(cx, &then.kind, semi_spans.clone()); + check_block_return(cx, &then.kind, peeled_drop_expr.span, semi_spans.clone()); if let Some(else_clause) = else_clause_opt { - check_block_return(cx, &else_clause.kind, semi_spans); + check_block_return(cx, &else_clause.kind, peeled_drop_expr.span, semi_spans); } }, // a match expr, check all arms @@ -246,33 +273,29 @@ fn check_final_expr<'tcx>( } }, // if it's a whole block, check it - other_expr_kind => check_block_return(cx, other_expr_kind, semi_spans), + other_expr_kind => check_block_return(cx, other_expr_kind, peeled_drop_expr.span, semi_spans), } } -fn emit_return_lint( - cx: &LateContext<'_>, - ret_span: Span, - semi_spans: Vec<Span>, - inner_span: Option<Span>, - replacement: RetReplacement, -) { +fn expr_contains_conjunctive_ifs<'tcx>(expr: &'tcx Expr<'tcx>) -> bool { + fn contains_if(expr: &Expr<'_>, on_if: bool) -> bool { + match expr.kind { + ExprKind::If(..) => on_if, + ExprKind::Binary(_, left, right) => contains_if(left, true) || contains_if(right, true), + _ => false, + } + } + + contains_if(expr, false) +} + +fn emit_return_lint(cx: &LateContext<'_>, ret_span: Span, semi_spans: Vec<Span>, replacement: RetReplacement<'_>) { if ret_span.from_expansion() { return; } - let mut applicability = Applicability::MachineApplicable; - let return_replacement = inner_span.map_or_else( - || replacement.to_string(), - |inner_span| { - let (snippet, _) = snippet_with_context(cx, inner_span, ret_span.ctxt(), "..", &mut applicability); - snippet.to_string() - }, - ); - let sugg_help = if inner_span.is_some() { - "remove `return`" - } else { - replacement.sugg_help() - }; + let applicability = replacement.applicability().unwrap_or(Applicability::MachineApplicable); + let return_replacement = replacement.to_string(); + let sugg_help = replacement.sugg_help(); span_lint_and_then(cx, NEEDLESS_RETURN, ret_span, "unneeded `return` statement", |diag| { diag.span_suggestion_hidden(ret_span, sugg_help, return_replacement, applicability); // for each parent statement, we need to remove the semicolon @@ -288,6 +311,7 @@ fn last_statement_borrows<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) && cx .tcx .fn_sig(def_id) + .subst_identity() .skip_binder() .output() .walk() 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 17763128c..a37e2772d 100644 --- a/src/tools/clippy/clippy_lints/src/same_name_method.rs +++ b/src/tools/clippy/clippy_lints/src/same_name_method.rs @@ -52,7 +52,7 @@ impl<'tcx> LateLintPass<'tcx> for SameNameMethod { let mut map = FxHashMap::<Res, ExistingName>::default(); for id in cx.tcx.hir().items() { - if matches!(cx.tcx.def_kind(id.owner_id), DefKind::Impl) + if matches!(cx.tcx.def_kind(id.owner_id), DefKind::Impl { .. }) && let item = cx.tcx.hir().item(id) && let ItemKind::Impl(Impl { items, 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 71b387c66..beca203c8 100644 --- a/src/tools/clippy/clippy_lints/src/self_named_constructors.rs +++ b/src/tools/clippy/clippy_lints/src/self_named_constructors.rs @@ -53,8 +53,8 @@ impl<'tcx> LateLintPass<'tcx> for SelfNamedConstructors { let parent = cx.tcx.hir().get_parent_item(impl_item.hir_id()).def_id; let item = cx.tcx.hir().expect_item(parent); - let self_ty = cx.tcx.type_of(item.owner_id); - let ret_ty = return_ty(cx, impl_item.hir_id()); + let self_ty = cx.tcx.type_of(item.owner_id).subst_identity(); + let ret_ty = return_ty(cx, impl_item.owner_id); // Do not check trait impls if matches!(item.kind, ItemKind::Impl(Impl { of_trait: Some(_), .. })) { diff --git a/src/tools/clippy/clippy_lints/src/semicolon_block.rs b/src/tools/clippy/clippy_lints/src/semicolon_block.rs index 8f1d1490e..34a3e5ddf 100644 --- a/src/tools/clippy/clippy_lints/src/semicolon_block.rs +++ b/src/tools/clippy/clippy_lints/src/semicolon_block.rs @@ -30,7 +30,7 @@ declare_clippy_lint! { /// # let x = 0; /// unsafe { f(x); } /// ``` - #[clippy::version = "1.66.0"] + #[clippy::version = "1.68.0"] pub SEMICOLON_INSIDE_BLOCK, restriction, "add a semicolon inside the block" @@ -59,7 +59,7 @@ declare_clippy_lint! { /// # let x = 0; /// unsafe { f(x) }; /// ``` - #[clippy::version = "1.66.0"] + #[clippy::version = "1.68.0"] pub SEMICOLON_OUTSIDE_BLOCK, restriction, "add a semicolon outside the block" diff --git a/src/tools/clippy/clippy_lints/src/significant_drop_tightening.rs b/src/tools/clippy/clippy_lints/src/significant_drop_tightening.rs new file mode 100644 index 000000000..c3e99aa00 --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/significant_drop_tightening.rs @@ -0,0 +1,423 @@ +use clippy_utils::{ + diagnostics::span_lint_and_then, + get_attr, + source::{indent_of, snippet}, +}; +use rustc_data_structures::fx::{FxHashMap, FxHashSet}; +use rustc_errors::{Applicability, Diagnostic}; +use rustc_hir::{ + self as hir, + intravisit::{walk_expr, Visitor}, +}; +use rustc_lint::{LateContext, LateLintPass, LintContext}; +use rustc_middle::ty::{subst::GenericArgKind, Ty, TypeAndMut}; +use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_span::{symbol::Ident, Span, DUMMY_SP}; + +declare_clippy_lint! { + /// ### What it does + /// + /// Searches for elements marked with `#[clippy::significant_drop]` that could be early + /// dropped but are in fact dropped at the end of their scopes. In other words, enforces the + /// "tightening" of their possible lifetimes. + /// + /// ### Why is this bad? + /// + /// Elements marked with `#[clippy::has_significant_drop]` are generally synchronizing + /// primitives that manage shared resources, as such, it is desired to release them as soon as + /// possible to avoid unnecessary resource contention. + /// + /// ### Example + /// + /// ```rust,ignore + /// fn main() { + /// let lock = some_sync_resource.lock(); + /// let owned_rslt = lock.do_stuff_with_resource(); + /// // Only `owned_rslt` is needed but `lock` is still held. + /// do_heavy_computation_that_takes_time(owned_rslt); + /// } + /// ``` + /// + /// Use instead: + /// + /// ```rust,ignore + /// fn main() { + /// let owned_rslt = some_sync_resource.lock().do_stuff_with_resource(); + /// do_heavy_computation_that_takes_time(owned_rslt); + /// } + /// ``` + #[clippy::version = "1.67.0"] + pub SIGNIFICANT_DROP_TIGHTENING, + nursery, + "Searches for elements marked with `#[clippy::has_significant_drop]` that could be early dropped but are in fact dropped at the end of their scopes" +} + +impl_lint_pass!(SignificantDropTightening<'_> => [SIGNIFICANT_DROP_TIGHTENING]); + +#[derive(Default)] +pub struct SignificantDropTightening<'tcx> { + /// Auxiliary structure used to avoid having to verify the same type multiple times. + seen_types: FxHashSet<Ty<'tcx>>, + type_cache: FxHashMap<Ty<'tcx>, bool>, +} + +impl<'tcx> SignificantDropTightening<'tcx> { + /// Unifies the statements of a block with its return expression. + fn all_block_stmts<'ret, 'rslt, 'stmts>( + block_stmts: &'stmts [hir::Stmt<'tcx>], + dummy_ret_stmt: Option<&'ret hir::Stmt<'tcx>>, + ) -> impl Iterator<Item = &'rslt hir::Stmt<'tcx>> + where + 'ret: 'rslt, + 'stmts: 'rslt, + { + block_stmts.iter().chain(dummy_ret_stmt) + } + + /// Searches for at least one statement that could slow down the release of a significant drop. + fn at_least_one_stmt_is_expensive<'stmt>(stmts: impl Iterator<Item = &'stmt hir::Stmt<'tcx>>) -> bool + where + 'tcx: 'stmt, + { + for stmt in stmts { + match stmt.kind { + hir::StmtKind::Expr(expr) if let hir::ExprKind::Path(_) = expr.kind => {} + hir::StmtKind::Local(local) if let Some(expr) = local.init + && let hir::ExprKind::Path(_) = expr.kind => {}, + _ => return true + }; + } + false + } + + /// Verifies if the expression is of type `drop(some_lock_path)` to assert that the temporary + /// is already being dropped before the end of its scope. + fn has_drop(expr: &'tcx hir::Expr<'_>, init_bind_ident: Ident) -> bool { + if let hir::ExprKind::Call(fun, args) = expr.kind + && let hir::ExprKind::Path(hir::QPath::Resolved(_, fun_path)) = &fun.kind + && let [fun_ident, ..] = fun_path.segments + && fun_ident.ident.name == rustc_span::sym::drop + && let [first_arg, ..] = args + && let hir::ExprKind::Path(hir::QPath::Resolved(_, arg_path)) = &first_arg.kind + && let [first_arg_ps, .. ] = arg_path.segments + { + first_arg_ps.ident == init_bind_ident + } + else { + false + } + } + + /// Tries to find types marked with `#[has_significant_drop]` of an expression `expr` that is + /// originated from `stmt` and then performs common logic on `sdap`. + fn modify_sdap_if_sig_drop_exists( + &mut self, + cx: &LateContext<'tcx>, + expr: &'tcx hir::Expr<'_>, + idx: usize, + sdap: &mut SigDropAuxParams, + stmt: &hir::Stmt<'_>, + cb: impl Fn(&mut SigDropAuxParams), + ) { + let mut sig_drop_finder = SigDropFinder::new(cx, &mut self.seen_types, &mut self.type_cache); + sig_drop_finder.visit_expr(expr); + if sig_drop_finder.has_sig_drop { + cb(sdap); + if sdap.number_of_stmts > 0 { + sdap.last_use_stmt_idx = idx; + sdap.last_use_stmt_span = stmt.span; + if let hir::ExprKind::MethodCall(_, _, _, span) = expr.kind { + sdap.last_use_method_span = span; + } + } + sdap.number_of_stmts = sdap.number_of_stmts.wrapping_add(1); + } + } + + /// Shows generic overall messages as well as specialized messages depending on the usage. + fn set_suggestions(cx: &LateContext<'tcx>, block_span: Span, diag: &mut Diagnostic, sdap: &SigDropAuxParams) { + match sdap.number_of_stmts { + 0 | 1 => {}, + 2 => { + let indent = " ".repeat(indent_of(cx, sdap.last_use_stmt_span).unwrap_or(0)); + let init_method = snippet(cx, sdap.init_method_span, ".."); + let usage_method = snippet(cx, sdap.last_use_method_span, ".."); + let stmt = if let Some(last_use_bind_span) = sdap.last_use_bind_span { + format!( + "\n{indent}let {} = {init_method}.{usage_method};", + snippet(cx, last_use_bind_span, ".."), + ) + } else { + format!("\n{indent}{init_method}.{usage_method};") + }; + diag.span_suggestion_verbose( + sdap.init_stmt_span, + "merge the temporary construction with its single usage", + stmt, + Applicability::MaybeIncorrect, + ); + diag.span_suggestion( + sdap.last_use_stmt_span, + "remove separated single usage", + "", + Applicability::MaybeIncorrect, + ); + }, + _ => { + diag.span_suggestion( + sdap.last_use_stmt_span.shrink_to_hi(), + "drop the temporary after the end of its last usage", + format!( + "\n{}drop({});", + " ".repeat(indent_of(cx, sdap.last_use_stmt_span).unwrap_or(0)), + sdap.init_bind_ident + ), + Applicability::MaybeIncorrect, + ); + }, + } + diag.note("this might lead to unnecessary resource contention"); + diag.span_label( + block_span, + format!( + "temporary `{}` is currently being dropped at the end of its contained scope", + sdap.init_bind_ident + ), + ); + } +} + +impl<'tcx> LateLintPass<'tcx> for SignificantDropTightening<'tcx> { + fn check_block(&mut self, cx: &LateContext<'tcx>, block: &'tcx hir::Block<'_>) { + let dummy_ret_stmt = block.expr.map(|expr| hir::Stmt { + hir_id: hir::HirId::INVALID, + kind: hir::StmtKind::Expr(expr), + span: DUMMY_SP, + }); + let mut sdap = SigDropAuxParams::default(); + for (idx, stmt) in Self::all_block_stmts(block.stmts, dummy_ret_stmt.as_ref()).enumerate() { + match stmt.kind { + hir::StmtKind::Expr(expr) => self.modify_sdap_if_sig_drop_exists( + cx, + expr, + idx, + &mut sdap, + stmt, + |_| {} + ), + hir::StmtKind::Local(local) if let Some(expr) = local.init => self.modify_sdap_if_sig_drop_exists( + cx, + expr, + idx, + &mut sdap, + stmt, + |local_sdap| { + if local_sdap.number_of_stmts == 0 { + if let hir::PatKind::Binding(_, _, ident, _) = local.pat.kind { + local_sdap.init_bind_ident = ident; + } + if let hir::ExprKind::MethodCall(_, local_expr, _, span) = expr.kind { + local_sdap.init_method_span = local_expr.span.to(span); + } + local_sdap.init_stmt_span = stmt.span; + } + else if let hir::PatKind::Binding(_, _, ident, _) = local.pat.kind { + local_sdap.last_use_bind_span = Some(ident.span); + } + } + ), + hir::StmtKind::Semi(expr) => { + if Self::has_drop(expr, sdap.init_bind_ident) { + return; + } + self.modify_sdap_if_sig_drop_exists(cx, expr, idx, &mut sdap, stmt, |_| {}); + }, + _ => {} + }; + } + + let idx = sdap.last_use_stmt_idx.wrapping_add(1); + let stmts_after_last_use = Self::all_block_stmts(block.stmts, dummy_ret_stmt.as_ref()).skip(idx); + if sdap.number_of_stmts > 1 && Self::at_least_one_stmt_is_expensive(stmts_after_last_use) { + span_lint_and_then( + cx, + SIGNIFICANT_DROP_TIGHTENING, + sdap.init_bind_ident.span, + "temporary with significant `Drop` can be early dropped", + |diag| { + Self::set_suggestions(cx, block.span, diag, &sdap); + }, + ); + } + } +} + +/// Auxiliary parameters used on each block check. +struct SigDropAuxParams { + /// The binding or variable that references the initial construction of the type marked with + /// `#[has_significant_drop]`. + init_bind_ident: Ident, + /// Similar to `init_bind_ident` but encompasses the right-hand method call. + init_method_span: Span, + /// Similar to `init_bind_ident` but encompasses the whole contained statement. + init_stmt_span: Span, + + /// The last visited binding or variable span within a block that had any referenced inner type + /// marked with `#[has_significant_drop]`. + last_use_bind_span: Option<Span>, + /// Index of the last visited statement within a block that had any referenced inner type + /// marked with `#[has_significant_drop]`. + last_use_stmt_idx: usize, + /// Similar to `last_use_bind_span` but encompasses the whole contained statement. + last_use_stmt_span: Span, + /// Similar to `last_use_bind_span` but encompasses the right-hand method call. + last_use_method_span: Span, + + /// Total number of statements within a block that have any referenced inner type marked with + /// `#[has_significant_drop]`. + number_of_stmts: usize, +} + +impl Default for SigDropAuxParams { + fn default() -> Self { + Self { + init_bind_ident: Ident::empty(), + init_method_span: DUMMY_SP, + init_stmt_span: DUMMY_SP, + last_use_bind_span: None, + last_use_method_span: DUMMY_SP, + last_use_stmt_idx: 0, + last_use_stmt_span: DUMMY_SP, + number_of_stmts: 0, + } + } +} + +/// Checks the existence of the `#[has_significant_drop]` attribute +struct SigDropChecker<'cx, 'sdt, 'tcx> { + cx: &'cx LateContext<'tcx>, + seen_types: &'sdt mut FxHashSet<Ty<'tcx>>, + type_cache: &'sdt mut FxHashMap<Ty<'tcx>, bool>, +} + +impl<'cx, 'sdt, 'tcx> SigDropChecker<'cx, 'sdt, 'tcx> { + pub(crate) fn new( + cx: &'cx LateContext<'tcx>, + seen_types: &'sdt mut FxHashSet<Ty<'tcx>>, + type_cache: &'sdt mut FxHashMap<Ty<'tcx>, bool>, + ) -> Self { + seen_types.clear(); + Self { + cx, + seen_types, + type_cache, + } + } + + pub(crate) fn has_sig_drop_attr_uncached(&mut self, ty: Ty<'tcx>) -> bool { + if let Some(adt) = ty.ty_adt_def() { + let mut iter = get_attr( + self.cx.sess(), + self.cx.tcx.get_attrs_unchecked(adt.did()), + "has_significant_drop", + ); + if iter.next().is_some() { + return true; + } + } + match ty.kind() { + rustc_middle::ty::Adt(a, b) => { + for f in a.all_fields() { + let ty = f.ty(self.cx.tcx, b); + if !self.has_seen_ty(ty) && self.has_sig_drop_attr(ty) { + return true; + } + } + for generic_arg in b.iter() { + if let GenericArgKind::Type(ty) = generic_arg.unpack() { + if self.has_sig_drop_attr(ty) { + return true; + } + } + } + false + }, + rustc_middle::ty::Array(ty, _) + | rustc_middle::ty::RawPtr(TypeAndMut { ty, .. }) + | rustc_middle::ty::Ref(_, ty, _) + | rustc_middle::ty::Slice(ty) => self.has_sig_drop_attr(*ty), + _ => false, + } + } + + pub(crate) fn has_sig_drop_attr(&mut self, ty: Ty<'tcx>) -> bool { + // The borrow checker prevents us from using something fancier like or_insert_with. + if let Some(ty) = self.type_cache.get(&ty) { + return *ty; + } + let value = self.has_sig_drop_attr_uncached(ty); + self.type_cache.insert(ty, value); + value + } + + fn has_seen_ty(&mut self, ty: Ty<'tcx>) -> bool { + !self.seen_types.insert(ty) + } +} + +/// Performs recursive calls to find any inner type marked with `#[has_significant_drop]`. +struct SigDropFinder<'cx, 'sdt, 'tcx> { + cx: &'cx LateContext<'tcx>, + has_sig_drop: bool, + sig_drop_checker: SigDropChecker<'cx, 'sdt, 'tcx>, +} + +impl<'cx, 'sdt, 'tcx> SigDropFinder<'cx, 'sdt, 'tcx> { + fn new( + cx: &'cx LateContext<'tcx>, + seen_types: &'sdt mut FxHashSet<Ty<'tcx>>, + type_cache: &'sdt mut FxHashMap<Ty<'tcx>, bool>, + ) -> Self { + Self { + cx, + has_sig_drop: false, + sig_drop_checker: SigDropChecker::new(cx, seen_types, type_cache), + } + } +} + +impl<'cx, 'sdt, 'tcx> Visitor<'tcx> for SigDropFinder<'cx, 'sdt, 'tcx> { + fn visit_expr(&mut self, ex: &'tcx hir::Expr<'_>) { + if self + .sig_drop_checker + .has_sig_drop_attr(self.cx.typeck_results().expr_ty(ex)) + { + self.has_sig_drop = true; + return; + } + + match ex.kind { + hir::ExprKind::MethodCall(_, expr, ..) => { + self.visit_expr(expr); + }, + hir::ExprKind::Array(..) + | hir::ExprKind::Assign(..) + | hir::ExprKind::AssignOp(..) + | hir::ExprKind::Binary(..) + | hir::ExprKind::Box(..) + | hir::ExprKind::Call(..) + | hir::ExprKind::Field(..) + | hir::ExprKind::If(..) + | hir::ExprKind::Index(..) + | hir::ExprKind::Match(..) + | hir::ExprKind::Repeat(..) + | hir::ExprKind::Ret(..) + | hir::ExprKind::Tup(..) + | hir::ExprKind::Unary(..) + | hir::ExprKind::Yield(..) => { + walk_expr(self, ex); + }, + _ => {}, + } + } +} diff --git a/src/tools/clippy/clippy_lints/src/strings.rs b/src/tools/clippy/clippy_lints/src/strings.rs index bc18cad6d..b2f4b3109 100644 --- a/src/tools/clippy/clippy_lints/src/strings.rs +++ b/src/tools/clippy/clippy_lints/src/strings.rs @@ -190,7 +190,7 @@ impl<'tcx> LateLintPass<'tcx> for StringAdd { }, ExprKind::Index(target, _idx) => { let e_ty = cx.typeck_results().expr_ty(target).peel_refs(); - if matches!(e_ty.kind(), ty::Str) || is_type_lang_item(cx, e_ty, LangItem::String) { + if e_ty.is_str() || is_type_lang_item(cx, e_ty, LangItem::String) { span_lint( cx, STRING_SLICE, @@ -407,7 +407,7 @@ impl<'tcx> LateLintPass<'tcx> for StrToString { 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.kind() == ty::Str; + if ty.is_str(); then { span_lint_and_help( cx, 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 301aa5798..9c0dc8096 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 @@ -9,7 +9,7 @@ declare_clippy_lint! { /// ### What it does /// Warns for a Bitwise XOR (`^`) operator being probably confused as a powering. It will not trigger if any of the numbers are not in decimal. /// ### Why is this bad? - /// It's most probably a typo and may lead to unexpected behaviours. + /// It's most probably a typo and may lead to unexpected behaviours. /// ### Example /// ```rust /// let x = 3_i32 ^ 4_i32; @@ -18,7 +18,7 @@ declare_clippy_lint! { /// ```rust /// let x = 3_i32.pow(4); /// ``` - #[clippy::version = "1.66.0"] + #[clippy::version = "1.67.0"] pub SUSPICIOUS_XOR_USED_AS_POW, restriction, "XOR (`^`) operator possibly used as exponentiation operator" diff --git a/src/tools/clippy/clippy_lints/src/swap.rs b/src/tools/clippy/clippy_lints/src/swap.rs index 17e9cc5f6..0f062cecf 100644 --- a/src/tools/clippy/clippy_lints/src/swap.rs +++ b/src/tools/clippy/clippy_lints/src/swap.rs @@ -10,7 +10,7 @@ use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty; use rustc_session::{declare_lint_pass, declare_tool_lint}; use rustc_span::source_map::Spanned; -use rustc_span::{sym, Span}; +use rustc_span::{sym, symbol::Ident, Span}; declare_clippy_lint! { /// ### What it does @@ -174,53 +174,74 @@ fn check_manual_swap(cx: &LateContext<'_>, block: &Block<'_>) { /// Implementation of the `ALMOST_SWAPPED` lint. fn check_suspicious_swap(cx: &LateContext<'_>, block: &Block<'_>) { - for w in block.stmts.windows(2) { - if_chain! { - if let StmtKind::Semi(first) = w[0].kind; - if let StmtKind::Semi(second) = w[1].kind; - if first.span.ctxt() == second.span.ctxt(); - if let ExprKind::Assign(lhs0, rhs0, _) = first.kind; - if let ExprKind::Assign(lhs1, rhs1, _) = second.kind; - if eq_expr_value(cx, lhs0, rhs1); - if eq_expr_value(cx, lhs1, rhs0); - then { - let lhs0 = Sugg::hir_opt(cx, lhs0); - let rhs0 = Sugg::hir_opt(cx, rhs0); - let (what, lhs, rhs) = if let (Some(first), Some(second)) = (lhs0, rhs0) { - ( - format!(" `{first}` and `{second}`"), - first.mut_addr().to_string(), - second.mut_addr().to_string(), - ) - } else { - (String::new(), String::new(), String::new()) - }; + for [first, second] in block.stmts.array_windows() { + if let Some((lhs0, rhs0)) = parse(first) + && let Some((lhs1, rhs1)) = parse(second) + && first.span.eq_ctxt(second.span) + && is_same(cx, lhs0, rhs1) + && is_same(cx, lhs1, rhs0) + && let Some(lhs_sugg) = match &lhs0 { + ExprOrIdent::Expr(expr) => Sugg::hir_opt(cx, expr), + ExprOrIdent::Ident(ident) => Some(Sugg::NonParen(ident.as_str().into())), + } + && let Some(rhs_sugg) = Sugg::hir_opt(cx, rhs0) + { + let span = first.span.to(rhs1.span); + let Some(sugg) = std_or_core(cx) else { return }; + span_lint_and_then( + cx, + ALMOST_SWAPPED, + span, + &format!("this looks like you are trying to swap `{lhs_sugg}` and `{rhs_sugg}`"), + |diag| { + diag.span_suggestion( + span, + "try", + format!("{sugg}::mem::swap({}, {})", lhs_sugg.mut_addr(), rhs_sugg.mut_addr()), + Applicability::MaybeIncorrect, + ); + diag.note(format!("or maybe you should use `{sugg}::mem::replace`?")); + }, + ); + } + } +} + +fn is_same(cx: &LateContext<'_>, lhs: ExprOrIdent<'_>, rhs: &Expr<'_>) -> bool { + match lhs { + ExprOrIdent::Expr(expr) => eq_expr_value(cx, expr, rhs), + ExprOrIdent::Ident(ident) => { + if let ExprKind::Path(QPath::Resolved(None, path)) = rhs.kind + && let [segment] = &path.segments + && segment.ident == ident + { + true + } else { + false + } + } + } +} - let span = first.span.to(second.span); - let Some(sugg) = std_or_core(cx) else { return }; +#[derive(Debug, Clone, Copy)] +enum ExprOrIdent<'a> { + Expr(&'a Expr<'a>), + Ident(Ident), +} - span_lint_and_then(cx, - ALMOST_SWAPPED, - span, - &format!("this looks like you are trying to swap{what}"), - |diag| { - if !what.is_empty() { - diag.span_suggestion( - span, - "try", - format!( - "{sugg}::mem::swap({lhs}, {rhs})", - ), - Applicability::MaybeIncorrect, - ); - diag.note( - format!("or maybe you should use `{sugg}::mem::replace`?") - ); - } - }); +fn parse<'a, 'hir>(stmt: &'a Stmt<'hir>) -> Option<(ExprOrIdent<'hir>, &'a Expr<'hir>)> { + if let StmtKind::Semi(expr) = stmt.kind { + if let ExprKind::Assign(lhs, rhs, _) = expr.kind { + return Some((ExprOrIdent::Expr(lhs), rhs)); + } + } else if let StmtKind::Local(expr) = stmt.kind { + if let Some(rhs) = expr.init { + if let PatKind::Binding(_, _, ident_l, _) = expr.pat.kind { + return Some((ExprOrIdent::Ident(ident_l), rhs)); } } } + None } /// Implementation of the xor case for `MANUAL_SWAP` lint. 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 63b326048..1382c1a40 100644 --- a/src/tools/clippy/clippy_lints/src/trailing_empty_array.rs +++ b/src/tools/clippy/clippy_lints/src/trailing_empty_array.rs @@ -61,9 +61,8 @@ fn is_struct_with_trailing_zero_sized_array(cx: &LateContext<'_>, item: &Item<'_ if let rustc_hir::TyKind::Array(_, rustc_hir::ArrayLen::Body(length)) = last_field.ty.kind; // Then check if that that array zero-sized - let length_ldid = cx.tcx.hir().local_def_id(length.hir_id); - let length = Const::from_anon_const(cx.tcx, length_ldid); - let length = length.try_eval_usize(cx.tcx, cx.param_env); + 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 diff --git a/src/tools/clippy/clippy_lints/src/transmute/mod.rs b/src/tools/clippy/clippy_lints/src/transmute/mod.rs index 691d759d7..c01cbe509 100644 --- a/src/tools/clippy/clippy_lints/src/transmute/mod.rs +++ b/src/tools/clippy/clippy_lints/src/transmute/mod.rs @@ -3,6 +3,7 @@ mod transmute_float_to_int; mod transmute_int_to_bool; mod transmute_int_to_char; mod transmute_int_to_float; +mod transmute_int_to_non_zero; mod transmute_null_to_fn; mod transmute_num_to_bytes; mod transmute_ptr_to_ptr; @@ -255,6 +256,31 @@ declare_clippy_lint! { declare_clippy_lint! { /// ### What it does + /// Checks for transmutes from integers to `NonZero*` types, and suggests their `new_unchecked` + /// method instead. + /// + /// ### Why is this bad? + /// Transmutes work on any types and thus might cause unsoundness when those types change + /// elsewhere. `new_unchecked` only works for the appropriate types instead. + /// + /// ### Example + /// ```rust + /// # use core::num::NonZeroU32; + /// let _non_zero: NonZeroU32 = unsafe { std::mem::transmute(123) }; + /// ``` + /// Use instead: + /// ```rust + /// # use core::num::NonZeroU32; + /// let _non_zero = unsafe { NonZeroU32::new_unchecked(123) }; + /// ``` + #[clippy::version = "1.69.0"] + pub TRANSMUTE_INT_TO_NON_ZERO, + complexity, + "transmutes from an integer to a non-zero wrapper" +} + +declare_clippy_lint! { + /// ### What it does /// Checks for transmutes from a float to an integer. /// /// ### Why is this bad? @@ -451,6 +477,7 @@ impl_lint_pass!(Transmute => [ TRANSMUTE_BYTES_TO_STR, TRANSMUTE_INT_TO_BOOL, TRANSMUTE_INT_TO_FLOAT, + TRANSMUTE_INT_TO_NON_ZERO, TRANSMUTE_FLOAT_TO_INT, TRANSMUTE_NUM_TO_BYTES, UNSOUND_COLLECTION_TRANSMUTE, @@ -479,7 +506,10 @@ impl<'tcx> LateLintPass<'tcx> for Transmute { // - char conversions (https://github.com/rust-lang/rust/issues/89259) let const_context = in_constant(cx, e.hir_id); - let from_ty = cx.typeck_results().expr_ty_adjusted(arg); + 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); @@ -498,6 +528,7 @@ impl<'tcx> LateLintPass<'tcx> for Transmute { | 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) | ( @@ -506,7 +537,7 @@ impl<'tcx> LateLintPass<'tcx> for Transmute { ); if !linted { - transmutes_expressible_as_ptr_casts::check(cx, e, from_ty, to_ty, arg); + 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_int_to_non_zero.rs b/src/tools/clippy/clippy_lints/src/transmute/transmute_int_to_non_zero.rs new file mode 100644 index 000000000..550365325 --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/transmute/transmute_int_to_non_zero.rs @@ -0,0 +1,61 @@ +use super::TRANSMUTE_INT_TO_NON_ZERO; +use clippy_utils::diagnostics::span_lint_and_then; +use clippy_utils::sugg; +use rustc_errors::Applicability; +use rustc_hir::Expr; +use rustc_lint::LateContext; +use rustc_middle::{ + query::Key, + ty::{self, Ty}, +}; +use rustc_span::symbol::sym; + +/// Checks for `transmute_int_to_non_zero` lint. +/// Returns `true` if it's triggered, otherwise returns `false`. +pub(super) fn check<'tcx>( + cx: &LateContext<'tcx>, + e: &'tcx Expr<'_>, + from_ty: Ty<'tcx>, + to_ty: Ty<'tcx>, + arg: &'tcx Expr<'_>, +) -> bool { + let (ty::Int(_) | ty::Uint(_), Some(to_ty_id)) = (&from_ty.kind(), to_ty.ty_adt_id()) else { + return false; + }; + let Some(to_type_sym) = cx.tcx.get_diagnostic_name(to_ty_id) else { + return false; + }; + + if !matches!( + to_type_sym, + sym::NonZeroU8 + | sym::NonZeroU16 + | sym::NonZeroU32 + | sym::NonZeroU64 + | sym::NonZeroU128 + | sym::NonZeroI8 + | sym::NonZeroI16 + | sym::NonZeroI32 + | sym::NonZeroI64 + | sym::NonZeroI128 + ) { + return false; + } + + span_lint_and_then( + cx, + TRANSMUTE_INT_TO_NON_ZERO, + e.span, + &format!("transmute from a `{from_ty}` to a `{to_type_sym}`"), + |diag| { + let arg = sugg::Sugg::hir(cx, arg, ".."); + diag.span_suggestion( + e.span, + "consider using", + format!("{to_type_sym}::{}({arg})", sym::new_unchecked), + Applicability::Unspecified, + ); + }, + ); + true +} diff --git a/src/tools/clippy/clippy_lints/src/transmute/transmute_ptr_to_ref.rs b/src/tools/clippy/clippy_lints/src/transmute/transmute_ptr_to_ref.rs index 54ac04df1..6bdb9aa5a 100644 --- a/src/tools/clippy/clippy_lints/src/transmute/transmute_ptr_to_ref.rs +++ b/src/tools/clippy/clippy_lints/src/transmute/transmute_ptr_to_ref.rs @@ -6,7 +6,7 @@ use clippy_utils::sugg; use rustc_errors::Applicability; use rustc_hir::{self as hir, Expr, GenericArg, Mutability, Path, TyKind}; use rustc_lint::LateContext; -use rustc_middle::ty::{self, Ty, TypeVisitable}; +use rustc_middle::ty::{self, Ty, TypeVisitableExt}; /// Checks for `transmute_ptr_to_ref` lint. /// Returns `true` if it's triggered, otherwise returns `false`. 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 afb7f2e13..426c72538 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 @@ -22,7 +22,8 @@ pub(super) fn check<'tcx>( 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::Str) = (&ty_from.kind(), &ty_to.kind()); + 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 { 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 af0242348..5e24213d0 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 @@ -273,7 +273,7 @@ fn reduce_ty<'tcx>(cx: &LateContext<'tcx>, mut ty: Ty<'tcx>) -> ReducedTy<'tcx> .non_enum_variant() .fields .iter() - .map(|f| cx.tcx.bound_type_of(f.did).subst(cx.tcx, substs)); + .map(|f| cx.tcx.type_of(f.did).subst(cx.tcx, substs)); let Some(sized_ty) = iter.find(|&ty| !is_zero_sized_ty(cx, ty)) else { return ReducedTy::TypeErasure { raw_ptr_only: false }; }; diff --git a/src/tools/clippy/clippy_lints/src/transmute/transmutes_expressible_as_ptr_casts.rs b/src/tools/clippy/clippy_lints/src/transmute/transmutes_expressible_as_ptr_casts.rs index b79d4e915..8530b4324 100644 --- a/src/tools/clippy/clippy_lints/src/transmute/transmutes_expressible_as_ptr_casts.rs +++ b/src/tools/clippy/clippy_lints/src/transmute/transmutes_expressible_as_ptr_casts.rs @@ -1,11 +1,11 @@ -use super::utils::can_be_expressed_as_pointer_cast; +use super::utils::check_cast; use super::TRANSMUTES_EXPRESSIBLE_AS_PTR_CASTS; -use clippy_utils::diagnostics::span_lint_and_then; -use clippy_utils::sugg; +use clippy_utils::diagnostics::span_lint_and_sugg; +use clippy_utils::sugg::Sugg; use rustc_errors::Applicability; use rustc_hir::Expr; use rustc_lint::LateContext; -use rustc_middle::ty::Ty; +use rustc_middle::ty::{cast::CastKind, Ty}; /// Checks for `transmutes_expressible_as_ptr_casts` lint. /// Returns `true` if it's triggered, otherwise returns `false`. @@ -13,24 +13,40 @@ pub(super) fn check<'tcx>( cx: &LateContext<'tcx>, e: &'tcx Expr<'_>, from_ty: Ty<'tcx>, + from_ty_adjusted: bool, to_ty: Ty<'tcx>, arg: &'tcx Expr<'_>, ) -> bool { - if can_be_expressed_as_pointer_cast(cx, e, from_ty, to_ty) { - span_lint_and_then( - cx, - TRANSMUTES_EXPRESSIBLE_AS_PTR_CASTS, - e.span, - &format!("transmute from `{from_ty}` to `{to_ty}` which could be expressed as a pointer cast instead"), - |diag| { - if let Some(arg) = sugg::Sugg::hir_opt(cx, arg) { - let sugg = arg.as_ty(to_ty.to_string()).to_string(); - diag.span_suggestion(e.span, "try", sugg, Applicability::MachineApplicable); - } - }, - ); - true - } else { - false - } + use CastKind::{AddrPtrCast, ArrayPtrCast, FnPtrAddrCast, FnPtrPtrCast, PtrAddrCast, PtrPtrCast}; + let mut app = Applicability::MachineApplicable; + let sugg = match check_cast(cx, e, from_ty, to_ty) { + Some(PtrPtrCast | AddrPtrCast | ArrayPtrCast | FnPtrPtrCast | FnPtrAddrCast) => { + Sugg::hir_with_context(cx, arg, e.span.ctxt(), "..", &mut app) + .as_ty(to_ty.to_string()) + .to_string() + }, + Some(PtrAddrCast) if !from_ty_adjusted => Sugg::hir_with_context(cx, arg, e.span.ctxt(), "..", &mut app) + .as_ty(to_ty.to_string()) + .to_string(), + + // The only adjustments here would be ref-to-ptr and unsize coercions. The result of an unsize coercions can't + // be transmuted to a usize. For ref-to-ptr coercions, borrows need to be cast to a pointer before being cast to + // a usize. + Some(PtrAddrCast) => format!( + "{} as {to_ty}", + Sugg::hir_with_context(cx, arg, e.span.ctxt(), "..", &mut app).as_ty(from_ty) + ), + _ => return false, + }; + + span_lint_and_sugg( + cx, + TRANSMUTES_EXPRESSIBLE_AS_PTR_CASTS, + e.span, + &format!("transmute from `{from_ty}` to `{to_ty}` which could be expressed as a pointer cast instead"), + "try", + sugg, + app, + ); + true } diff --git a/src/tools/clippy/clippy_lints/src/transmute/useless_transmute.rs b/src/tools/clippy/clippy_lints/src/transmute/useless_transmute.rs index 871c3fadb..56207fe76 100644 --- a/src/tools/clippy/clippy_lints/src/transmute/useless_transmute.rs +++ b/src/tools/clippy/clippy_lints/src/transmute/useless_transmute.rs @@ -4,7 +4,7 @@ use clippy_utils::sugg; use rustc_errors::Applicability; use rustc_hir::Expr; use rustc_lint::LateContext; -use rustc_middle::ty::{self, Ty, TypeVisitable}; +use rustc_middle::ty::{self, Ty, TypeVisitableExt}; /// Checks for `useless_transmute` lint. /// Returns `true` if it's triggered, otherwise returns `false`. diff --git a/src/tools/clippy/clippy_lints/src/transmute/utils.rs b/src/tools/clippy/clippy_lints/src/transmute/utils.rs index 49d863ec0..cddaf9450 100644 --- a/src/tools/clippy/clippy_lints/src/transmute/utils.rs +++ b/src/tools/clippy/clippy_lints/src/transmute/utils.rs @@ -20,33 +20,21 @@ pub(super) fn is_layout_incompatible<'tcx>(cx: &LateContext<'tcx>, from: Ty<'tcx } } -/// Check if the type conversion can be expressed as a pointer cast, instead of -/// a transmute. In certain cases, including some invalid casts from array -/// references to pointers, this may cause additional errors to be emitted and/or -/// ICE error messages. This function will panic if that occurs. -pub(super) fn can_be_expressed_as_pointer_cast<'tcx>( - cx: &LateContext<'tcx>, - e: &'tcx Expr<'_>, - from_ty: Ty<'tcx>, - to_ty: Ty<'tcx>, -) -> bool { - use CastKind::{AddrPtrCast, ArrayPtrCast, FnPtrAddrCast, FnPtrPtrCast, PtrAddrCast, PtrPtrCast}; - matches!( - check_cast(cx, e, from_ty, to_ty), - Some(PtrPtrCast | PtrAddrCast | AddrPtrCast | ArrayPtrCast | FnPtrPtrCast | FnPtrAddrCast) - ) -} - /// If a cast from `from_ty` to `to_ty` is valid, returns an Ok containing the kind of /// the cast. In certain cases, including some invalid casts from array references /// to pointers, this may cause additional errors to be emitted and/or ICE error /// messages. This function will panic if that occurs. -fn check_cast<'tcx>(cx: &LateContext<'tcx>, e: &'tcx Expr<'_>, from_ty: Ty<'tcx>, to_ty: Ty<'tcx>) -> Option<CastKind> { +pub(super) fn check_cast<'tcx>( + cx: &LateContext<'tcx>, + e: &'tcx Expr<'_>, + from_ty: Ty<'tcx>, + to_ty: Ty<'tcx>, +) -> Option<CastKind> { let hir_id = e.hir_id; let local_def_id = hir_id.owner.def_id; Inherited::build(cx.tcx, local_def_id).enter(|inherited| { - let fn_ctxt = FnCtxt::new(inherited, cx.param_env, hir_id); + let fn_ctxt = FnCtxt::new(inherited, cx.param_env, local_def_id); // If we already have errors, we can't be sure we can pointer cast. assert!( diff --git a/src/tools/clippy/clippy_lints/src/types/mod.rs b/src/tools/clippy/clippy_lints/src/types/mod.rs index 229478b7c..c1f228d5f 100644 --- a/src/tools/clippy/clippy_lints/src/types/mod.rs +++ b/src/tools/clippy/clippy_lints/src/types/mod.rs @@ -12,11 +12,12 @@ mod vec_box; use rustc_hir as hir; use rustc_hir::intravisit::FnKind; use rustc_hir::{ - Body, FnDecl, FnRetTy, GenericArg, HirId, ImplItem, ImplItemKind, Item, ItemKind, Local, MutTy, QPath, TraitItem, + Body, FnDecl, FnRetTy, GenericArg, ImplItem, ImplItemKind, Item, ItemKind, Local, MutTy, QPath, TraitItem, TraitItemKind, TyKind, }; use rustc_lint::{LateContext, LateLintPass}; use rustc_session::{declare_tool_lint, impl_lint_pass}; +use rustc_span::def_id::LocalDefId; use rustc_span::source_map::Span; declare_clippy_lint! { @@ -311,15 +312,27 @@ pub struct Types { impl_lint_pass!(Types => [BOX_COLLECTION, VEC_BOX, OPTION_OPTION, LINKEDLIST, BORROWED_BOX, REDUNDANT_ALLOCATION, RC_BUFFER, RC_MUTEX, TYPE_COMPLEXITY]); impl<'tcx> LateLintPass<'tcx> for Types { - fn check_fn(&mut self, cx: &LateContext<'_>, _: FnKind<'_>, decl: &FnDecl<'_>, _: &Body<'_>, _: Span, id: HirId) { - 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(id).def_id) { - matches!(item.kind, ItemKind::Impl(hir::Impl { of_trait: Some(_), .. })) - } else { - false - }; + fn check_fn( + &mut self, + cx: &LateContext<'_>, + _: FnKind<'_>, + decl: &FnDecl<'_>, + _: &Body<'_>, + _: Span, + def_id: LocalDefId, + ) { + 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(cx.tcx.hir().local_def_id_to_hir_id(def_id)) + .def_id, + ) { + matches!(item.kind, ItemKind::Impl(hir::Impl { of_trait: Some(_), .. })) + } else { + false + }; - let is_exported = cx.effective_visibilities.is_exported(cx.tcx.hir().local_def_id(id)); + let is_exported = cx.effective_visibilities.is_exported(def_id); self.check_fn_decl( cx, @@ -379,9 +392,7 @@ impl<'tcx> LateLintPass<'tcx> for Types { } fn check_field_def(&mut self, cx: &LateContext<'_>, field: &hir::FieldDef<'_>) { - let is_exported = cx - .effective_visibilities - .is_exported(cx.tcx.hir().local_def_id(field.hir_id)); + let is_exported = cx.effective_visibilities.is_exported(field.def_id); self.check_ty( cx, diff --git a/src/tools/clippy/clippy_lints/src/types/redundant_allocation.rs b/src/tools/clippy/clippy_lints/src/types/redundant_allocation.rs index f9b9a66b5..f7adc9d35 100644 --- a/src/tools/clippy/clippy_lints/src/types/redundant_allocation.rs +++ b/src/tools/clippy/clippy_lints/src/types/redundant_allocation.rs @@ -5,7 +5,7 @@ use rustc_errors::Applicability; use rustc_hir::{self as hir, def_id::DefId, QPath, TyKind}; use rustc_hir_analysis::hir_ty_to_ty; use rustc_lint::LateContext; -use rustc_middle::ty::TypeVisitable; +use rustc_middle::ty::TypeVisitableExt; use rustc_span::symbol::sym; use super::{utils, REDUNDANT_ALLOCATION}; 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 7a3c7cd8a..d3062f3d2 100644 --- a/src/tools/clippy/clippy_lints/src/types/vec_box.rs +++ b/src/tools/clippy/clippy_lints/src/types/vec_box.rs @@ -7,7 +7,7 @@ use rustc_hir::{self as hir, def_id::DefId, GenericArg, QPath, TyKind}; use rustc_hir_analysis::hir_ty_to_ty; use rustc_lint::LateContext; use rustc_middle::ty::layout::LayoutOf; -use rustc_middle::ty::TypeVisitable; +use rustc_middle::ty::TypeVisitableExt; use rustc_span::symbol::sym; use super::VEC_BOX; 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 2e1b6d8d4..2920684ad 100644 --- a/src/tools/clippy/clippy_lints/src/undocumented_unsafe_blocks.rs +++ b/src/tools/clippy/clippy_lints/src/undocumented_unsafe_blocks.rs @@ -263,6 +263,18 @@ fn expr_has_unnecessary_safety_comment<'tcx>( expr: &'tcx hir::Expr<'tcx>, comment_pos: BytePos, ) -> Option<Span> { + if cx.tcx.hir().parent_iter(expr.hir_id).any(|(_, ref node)| { + matches!( + node, + Node::Block(&Block { + rules: BlockCheckMode::UnsafeBlock(UnsafeSource::UserProvided), + .. + }), + ) + }) { + return None; + } + // this should roughly be the reverse of `block_parents_have_safety_comment` if for_each_expr_with_closures(cx, expr, |expr| match expr.kind { hir::ExprKind::Block( 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 a138a4baa..289ca4e9b 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 @@ -76,7 +76,7 @@ fn get_projection_pred<'tcx>( fn get_args_to_check<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) -> Vec<(usize, String)> { let mut args_to_check = Vec::new(); if let Some(def_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id) { - let fn_sig = cx.tcx.fn_sig(def_id); + let fn_sig = cx.tcx.fn_sig(def_id).subst_identity(); let generics = cx.tcx.predicates_of(def_id); let fn_mut_preds = get_trait_predicates_for_trait_id(cx, generics, cx.tcx.lang_items().fn_mut_trait()); let ord_preds = get_trait_predicates_for_trait_id(cx, generics, cx.tcx.get_diagnostic_item(sym::Ord)); diff --git a/src/tools/clippy/clippy_lints/src/unit_types/let_unit_value.rs b/src/tools/clippy/clippy_lints/src/unit_types/let_unit_value.rs index ce9ebad8c..d6167a621 100644 --- a/src/tools/clippy/clippy_lints/src/unit_types/let_unit_value.rs +++ b/src/tools/clippy/clippy_lints/src/unit_types/let_unit_value.rs @@ -156,7 +156,7 @@ fn needs_inferred_result_ty( }, _ => return false, }; - let sig = cx.tcx.fn_sig(id).skip_binder(); + let sig = cx.tcx.fn_sig(id).subst_identity().skip_binder(); if let ty::Param(output_ty) = *sig.output().kind() { let args: Vec<&Expr<'_>> = if let Some(receiver) = receiver { std::iter::once(receiver).chain(args.iter()).collect() 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 9f207d32f..6e802794f 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 @@ -7,6 +7,7 @@ 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_span::symbol::sym; declare_clippy_lint! { /// ### What it does @@ -54,7 +55,7 @@ impl<'tcx> LateLintPass<'tcx> for UnnecessaryOwnedEmptyStrings { ); } else { if_chain! { - if Some(fun_def_id) == cx.tcx.lang_items().from_fn(); + 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; diff --git a/src/tools/clippy/clippy_lints/src/unnecessary_wraps.rs b/src/tools/clippy/clippy_lints/src/unnecessary_wraps.rs index 84ec0d0fb..8b0e0ce5a 100644 --- a/src/tools/clippy/clippy_lints/src/unnecessary_wraps.rs +++ b/src/tools/clippy/clippy_lints/src/unnecessary_wraps.rs @@ -5,10 +5,11 @@ 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, HirId, Impl, ItemKind, Node}; +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_span::def_id::LocalDefId; use rustc_span::symbol::sym; use rustc_span::Span; @@ -77,12 +78,11 @@ impl<'tcx> LateLintPass<'tcx> for UnnecessaryWraps { fn_decl: &FnDecl<'tcx>, body: &Body<'tcx>, span: Span, - hir_id: HirId, + def_id: LocalDefId, ) { // Abort if public function/method or closure. match fn_kind { FnKind::ItemFn(..) | FnKind::Method(..) => { - let def_id = cx.tcx.hir().local_def_id(hir_id); if self.avoid_breaking_exported_api && cx.effective_visibilities.is_exported(def_id) { return; } @@ -91,6 +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); if let Some(Node::Item(item)) = cx.tcx.hir().find_parent(hir_id) { if matches!( item.kind, @@ -101,17 +102,18 @@ impl<'tcx> LateLintPass<'tcx> for UnnecessaryWraps { } // Get the wrapper and inner types, if can't, abort. - let (return_type_label, lang_item, inner_type) = if let ty::Adt(adt_def, subst) = return_ty(cx, hir_id).kind() { - if cx.tcx.is_diagnostic_item(sym::Option, adt_def.did()) { - ("Option", OptionSome, subst.type_at(0)) - } else if cx.tcx.is_diagnostic_item(sym::Result, adt_def.did()) { - ("Result", ResultOk, subst.type_at(0)) + let (return_type_label, lang_item, inner_type) = + if let ty::Adt(adt_def, subst) = return_ty(cx, hir_id.expect_owner()).kind() { + if cx.tcx.is_diagnostic_item(sym::Option, adt_def.did()) { + ("Option", OptionSome, subst.type_at(0)) + } else if cx.tcx.is_diagnostic_item(sym::Result, adt_def.did()) { + ("Result", ResultOk, subst.type_at(0)) + } else { + return; + } } else { return; - } - } else { - return; - }; + }; // Check if all return expression respect the following condition and collect them. let mut suggs = Vec::new(); 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 7355260ae..a57bf7ee8 100644 --- a/src/tools/clippy/clippy_lints/src/unnested_or_patterns.rs +++ b/src/tools/clippy/clippy_lints/src/unnested_or_patterns.rs @@ -12,9 +12,9 @@ use rustc_errors::Applicability; use rustc_lint::{EarlyContext, EarlyLintPass}; use rustc_session::{declare_tool_lint, impl_lint_pass}; use rustc_span::DUMMY_SP; - use std::cell::Cell; use std::mem; +use thin_vec::{thin_vec, ThinVec}; declare_clippy_lint! { /// ### What it does @@ -214,7 +214,7 @@ macro_rules! always_pat { /// Focus on `focus_idx` in `alternatives`, /// attempting to extend it with elements of the same constructor `C` /// in `alternatives[focus_idx + 1..]`. -fn transform_with_focus_on_idx(alternatives: &mut Vec<P<Pat>>, focus_idx: usize) -> bool { +fn transform_with_focus_on_idx(alternatives: &mut ThinVec<P<Pat>>, focus_idx: usize) -> bool { // Extract the kind; we'll need to make some changes in it. let mut focus_kind = mem::replace(&mut alternatives[focus_idx].kind, PatKind::Wild); // We'll focus on `alternatives[focus_idx]`, @@ -296,7 +296,7 @@ fn extend_with_struct_pat( fps1: &mut [ast::PatField], rest1: bool, start: usize, - alternatives: &mut Vec<P<Pat>>, + alternatives: &mut ThinVec<P<Pat>>, ) -> bool { (0..fps1.len()).any(|idx| { let pos_in_2 = Cell::new(None); // The element `k`. @@ -336,9 +336,9 @@ fn extend_with_struct_pat( fn extend_with_matching_product( targets: &mut [P<Pat>], start: usize, - alternatives: &mut Vec<P<Pat>>, + alternatives: &mut ThinVec<P<Pat>>, predicate: impl Fn(&PatKind, &[P<Pat>], usize) -> bool, - extract: impl Fn(PatKind) -> Vec<P<Pat>>, + extract: impl Fn(PatKind) -> ThinVec<P<Pat>>, ) -> bool { (0..targets.len()).any(|idx| { let tail_or = drain_matching( @@ -365,14 +365,14 @@ fn take_pat(from: &mut Pat) -> Pat { /// Extend `target` as an or-pattern with the alternatives /// in `tail_or` if there are any and return if there were. -fn extend_with_tail_or(target: &mut Pat, tail_or: Vec<P<Pat>>) -> bool { - fn extend(target: &mut Pat, mut tail_or: Vec<P<Pat>>) { +fn extend_with_tail_or(target: &mut Pat, tail_or: ThinVec<P<Pat>>) -> bool { + fn extend(target: &mut Pat, mut tail_or: ThinVec<P<Pat>>) { match target { // On an existing or-pattern in the target, append to it. Pat { kind: Or(ps), .. } => ps.append(&mut tail_or), // Otherwise convert the target to an or-pattern. target => { - let mut init_or = vec![P(take_pat(target))]; + let mut init_or = thin_vec![P(take_pat(target))]; init_or.append(&mut tail_or); target.kind = Or(init_or); }, @@ -391,26 +391,42 @@ fn extend_with_tail_or(target: &mut Pat, tail_or: Vec<P<Pat>>) -> bool { // Only elements beginning with `start` are considered for extraction. fn drain_matching( start: usize, - alternatives: &mut Vec<P<Pat>>, + alternatives: &mut ThinVec<P<Pat>>, predicate: impl Fn(&PatKind) -> bool, extract: impl Fn(PatKind) -> P<Pat>, -) -> Vec<P<Pat>> { - let mut tail_or = vec![]; +) -> ThinVec<P<Pat>> { + let mut tail_or = ThinVec::new(); let mut idx = 0; - for pat in alternatives.drain_filter(|p| { - // Check if we should extract, but only if `idx >= start`. + + // If `ThinVec` had the `drain_filter` method, this loop could be rewritten + // like so: + // + // for pat in alternatives.drain_filter(|p| { + // // Check if we should extract, but only if `idx >= start`. + // idx += 1; + // idx > start && predicate(&p.kind) + // }) { + // tail_or.push(extract(pat.into_inner().kind)); + // } + let mut i = 0; + while i < alternatives.len() { idx += 1; - idx > start && predicate(&p.kind) - }) { - tail_or.push(extract(pat.into_inner().kind)); + // Check if we should extract, but only if `idx >= start`. + if idx > start && predicate(&alternatives[i].kind) { + let pat = alternatives.remove(i); + tail_or.push(extract(pat.into_inner().kind)); + } else { + i += 1; + } } + tail_or } fn extend_with_matching( target: &mut Pat, start: usize, - alternatives: &mut Vec<P<Pat>>, + alternatives: &mut ThinVec<P<Pat>>, predicate: impl Fn(&PatKind) -> bool, extract: impl Fn(PatKind) -> P<Pat>, ) -> bool { diff --git a/src/tools/clippy/clippy_lints/src/unused_async.rs b/src/tools/clippy/clippy_lints/src/unused_async.rs index 3538bef6e..55651a28b 100644 --- a/src/tools/clippy/clippy_lints/src/unused_async.rs +++ b/src/tools/clippy/clippy_lints/src/unused_async.rs @@ -1,9 +1,10 @@ use clippy_utils::diagnostics::span_lint_and_help; use rustc_hir::intravisit::{walk_expr, walk_fn, FnKind, Visitor}; -use rustc_hir::{Body, Expr, ExprKind, FnDecl, HirId, YieldSource}; +use rustc_hir::{Body, Expr, ExprKind, FnDecl, YieldSource}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::hir::nested_filter; use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_span::def_id::LocalDefId; use rustc_span::Span; declare_clippy_lint! { @@ -66,11 +67,11 @@ impl<'tcx> LateLintPass<'tcx> for UnusedAsync { fn_decl: &'tcx FnDecl<'tcx>, body: &Body<'tcx>, span: Span, - hir_id: HirId, + def_id: LocalDefId, ) { if !span.from_expansion() && fn_kind.asyncness().is_async() { let mut visitor = AsyncFnVisitor { cx, found_await: false }; - walk_fn(&mut visitor, fn_kind, fn_decl, body.id(), hir_id); + walk_fn(&mut visitor, fn_kind, fn_decl, body.id(), def_id); if !visitor.found_await { span_lint_and_help( cx, 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 92053cec5..0e526c216 100644 --- a/src/tools/clippy/clippy_lints/src/unused_io_amount.rs +++ b/src/tools/clippy/clippy_lints/src/unused_io_amount.rs @@ -65,7 +65,7 @@ impl<'tcx> LateLintPass<'tcx> for UnusedIoAmount { } }, hir::ExprKind::MethodCall(path, arg_0, ..) => match path.ident.as_str() { - "expect" | "unwrap" | "unwrap_or" | "unwrap_or_else" => { + "expect" | "unwrap" | "unwrap_or" | "unwrap_or_else" | "is_ok" | "is_err" => { check_map_error(cx, arg_0, expr); }, _ => (), diff --git a/src/tools/clippy/clippy_lints/src/unwrap.rs b/src/tools/clippy/clippy_lints/src/unwrap.rs index ea878043c..377d3fb6f 100644 --- a/src/tools/clippy/clippy_lints/src/unwrap.rs +++ b/src/tools/clippy/clippy_lints/src/unwrap.rs @@ -11,6 +11,7 @@ use rustc_middle::hir::nested_filter; use rustc_middle::lint::in_external_macro; use rustc_middle::ty::Ty; use rustc_session::{declare_lint_pass, declare_tool_lint}; +use rustc_span::def_id::LocalDefId; use rustc_span::source_map::Span; use rustc_span::sym; @@ -312,7 +313,7 @@ impl<'tcx> LateLintPass<'tcx> for Unwrap { decl: &'tcx FnDecl<'_>, body: &'tcx Body<'_>, span: Span, - fn_id: HirId, + fn_id: LocalDefId, ) { if span.from_expansion() { return; 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 f3611d174..3a1845425 100644 --- a/src/tools/clippy/clippy_lints/src/unwrap_in_result.rs +++ b/src/tools/clippy/clippy_lints/src/unwrap_in_result.rs @@ -64,8 +64,8 @@ impl<'tcx> LateLintPass<'tcx> for UnwrapInResult { // 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.hir_id()), sym::Result) - || is_type_diagnostic_item(cx, return_ty(cx, impl_item.hir_id()), sym::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); } diff --git a/src/tools/clippy/clippy_lints/src/use_self.rs b/src/tools/clippy/clippy_lints/src/use_self.rs index 6ae9d9d63..e7c540006 100644 --- a/src/tools/clippy/clippy_lints/src/use_self.rs +++ b/src/tools/clippy/clippy_lints/src/use_self.rs @@ -146,7 +146,7 @@ impl<'tcx> LateLintPass<'tcx> for UseSelf { .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); + let trait_method_sig = cx.tcx.fn_sig(trait_method).subst_identity(); let trait_method_sig = cx.tcx.erase_late_bound_regions(trait_method_sig); // `impl_inputs_outputs` is an iterator over the types (`hir::Ty`) declared in the @@ -218,7 +218,7 @@ impl<'tcx> LateLintPass<'tcx> for UseSelf { } else { hir_ty_to_ty(cx.tcx, hir_ty) }; - if same_type_and_consts(ty, cx.tcx.type_of(impl_id)); + if same_type_and_consts(ty, cx.tcx.type_of(impl_id).subst_identity()); then { span_lint(cx, hir_ty.span); } @@ -230,7 +230,7 @@ impl<'tcx> LateLintPass<'tcx> for UseSelf { 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); + if cx.typeck_results().expr_ty(expr) == cx.tcx.type_of(impl_id).subst_identity(); then {} else { return; } } match expr.kind { @@ -254,7 +254,7 @@ impl<'tcx> LateLintPass<'tcx> for UseSelf { if 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); + if cx.typeck_results().pat_ty(pat) == cx.tcx.type_of(impl_id).subst_identity(); then { 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 a95e7b613..fede625f7 100644 --- a/src/tools/clippy/clippy_lints/src/useless_conversion.rs +++ b/src/tools/clippy/clippy_lints/src/useless_conversion.rs @@ -161,7 +161,7 @@ impl<'tcx> LateLintPass<'tcx> for UselessConversion { } if_chain! { - if Some(def_id) == cx.tcx.lang_items().from_fn(); + if cx.tcx.is_diagnostic_item(sym::from_fn, def_id); if same_type_and_consts(a, b); then { diff --git a/src/tools/clippy/clippy_lints/src/utils/author.rs b/src/tools/clippy/clippy_lints/src/utils/author.rs index bd7daf077..c37e5bb67 100644 --- a/src/tools/clippy/clippy_lints/src/utils/author.rs +++ b/src/tools/clippy/clippy_lints/src/utils/author.rs @@ -588,7 +588,7 @@ impl<'a, 'tcx> PrintVisitor<'a, 'tcx> { }, } }, - ExprKind::Err => kind!("Err"), + ExprKind::Err(_) => kind!("Err"), ExprKind::DropTemps(expr) => { bind!(self, expr); kind!("DropTemps({expr})"); diff --git a/src/tools/clippy/clippy_lints/src/utils/conf.rs b/src/tools/clippy/clippy_lints/src/utils/conf.rs index 3e7d0028c..1c7f3e96d 100644 --- a/src/tools/clippy/clippy_lints/src/utils/conf.rs +++ b/src/tools/clippy/clippy_lints/src/utils/conf.rs @@ -219,7 +219,8 @@ define_Conf! { /// /// #### Noteworthy /// - /// A type, say `SomeType`, listed in this configuration has the same behavior of `["SomeType" , "*"], ["*", "SomeType"]` in `arithmetic_side_effects_allowed_binary`. + /// A type, say `SomeType`, listed in this configuration has the same behavior of + /// `["SomeType" , "*"], ["*", "SomeType"]` in `arithmetic_side_effects_allowed_binary`. (arithmetic_side_effects_allowed: rustc_data_structures::fx::FxHashSet<String> = <_>::default()), /// Lint: ARITHMETIC_SIDE_EFFECTS. /// @@ -252,7 +253,7 @@ 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, 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. + /// Lint: MANUAL_SPLIT_ONCE, MANUAL_STR_REPEAT, CLONED_INSTEAD_OF_COPIED, REDUNDANT_FIELD_NAMES, 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. /// /// The minimum rust version that the project supports (msrv: Option<String> = None), @@ -322,7 +323,7 @@ define_Conf! { /// /// The maximum size (in bytes) to consider a `Copy` type for passing by value instead of by reference. (trivial_copy_size_limit: Option<u64> = None), - /// Lint: LARGE_TYPE_PASS_BY_MOVE. + /// Lint: LARGE_TYPES_PASSED_BY_VALUE. /// /// The minimum size (in bytes) to consider a type for passing by reference instead of by value. (pass_by_value_size_limit: u64 = 256), @@ -410,7 +411,7 @@ define_Conf! { /// the slice pattern that is suggested. If more elements would be necessary, the lint is suppressed. /// For example, `[_, _, _, e, ..]` is a slice pattern with 4 elements. (max_suggested_slice_pattern_length: u64 = 3), - /// Lint: AWAIT_HOLDING_INVALID_TYPE + /// Lint: AWAIT_HOLDING_INVALID_TYPE. (await_holding_invalid_types: Vec<crate::utils::conf::DisallowedPath> = Vec::new()), /// Lint: LARGE_INCLUDE_FILE. /// @@ -418,25 +419,25 @@ define_Conf! { (max_include_file_size: u64 = 1_000_000), /// Lint: EXPECT_USED. /// - /// Whether `expect` should be allowed within `#[cfg(test)]` + /// Whether `expect` should be allowed in test functions or `#[cfg(test)]` (allow_expect_in_tests: bool = false), /// Lint: UNWRAP_USED. /// - /// Whether `unwrap` should be allowed in test cfg + /// Whether `unwrap` should be allowed in test functions or `#[cfg(test)]` (allow_unwrap_in_tests: bool = false), /// Lint: DBG_MACRO. /// - /// Whether `dbg!` should be allowed in test functions + /// Whether `dbg!` should be allowed in test functions or `#[cfg(test)]` (allow_dbg_in_tests: bool = false), /// Lint: PRINT_STDOUT, PRINT_STDERR. /// - /// Whether print macros (ex. `println!`) should be allowed in test functions + /// Whether print macros (ex. `println!`) should be allowed in test functions or `#[cfg(test)]` (allow_print_in_tests: bool = false), /// Lint: RESULT_LARGE_ERR. /// /// The maximum size of the `Err`-variant in a `Result` returned from a function (large_error_threshold: u64 = 128), - /// Lint: MUTABLE_KEY. + /// Lint: MUTABLE_KEY_TYPE. /// /// A list of paths to types that should be treated like `Arc`, i.e. ignored but /// for the generic parameters for determining interior mutability @@ -445,7 +446,7 @@ define_Conf! { /// /// Whether to allow mixed uninlined format args, e.g. `format!("{} {}", a, foo.bar)` (allow_mixed_uninlined_format_args: bool = true), - /// Lint: INDEXING_SLICING + /// Lint: INDEXING_SLICING. /// /// Whether to suppress a restriction lint in constant code. In same /// cases the restructured operation might not be unavoidable, as the @@ -453,6 +454,11 @@ define_Conf! { /// configuration will cause restriction lints to trigger even /// if no suggestion can be made. (suppress_restriction_lint_in_const: bool = false), + /// Lint: MISSING_DOCS_IN_PRIVATE_ITEMS. + /// + /// Whether to **only** check for missing documentation in items visible within the current + /// crate. For example, `pub(crate)` items. + (missing_docs_in_crate_items: bool = false), } /// Search for the configuration file. diff --git a/src/tools/clippy/clippy_lints/src/utils/dump_hir.rs b/src/tools/clippy/clippy_lints/src/utils/dump_hir.rs index 01efc527a..092041aec 100644 --- a/src/tools/clippy/clippy_lints/src/utils/dump_hir.rs +++ b/src/tools/clippy/clippy_lints/src/utils/dump_hir.rs @@ -1,4 +1,5 @@ use clippy_utils::get_attr; +use hir::TraitItem; use rustc_hir as hir; use rustc_lint::{LateContext, LateLintPass, LintContext}; use rustc_session::{declare_lint_pass, declare_tool_lint}; @@ -47,6 +48,18 @@ impl<'tcx> LateLintPass<'tcx> for DumpHir { println!("{stmt:#?}"); } } + + fn check_trait_item(&mut self, cx: &LateContext<'_>, item: &TraitItem<'_>) { + if has_attr(cx, item.hir_id()) { + println!("{item:#?}"); + } + } + + fn check_impl_item(&mut self, cx: &LateContext<'_>, item: &hir::ImplItem<'_>) { + if has_attr(cx, item.hir_id()) { + println!("{item:#?}"); + } + } } fn has_attr(cx: &LateContext<'_>, hir_id: hir::HirId) -> bool { 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 4b33d492a..688a8b865 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 @@ -78,7 +78,7 @@ impl<'tcx> LateLintPass<'tcx> for InterningDefinedSymbol { for item in cx.tcx.module_children(def_id).iter() { if_chain! { if let Res::Def(DefKind::Const, item_def_id) = item.res; - let ty = cx.tcx.type_of(item_def_id); + let ty = cx.tcx.type_of(item_def_id).subst_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(); 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 4c3b1b131..f71820765 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 @@ -215,14 +215,13 @@ impl<'tcx> LateLintPass<'tcx> for LintWithoutLintPass { cx, }; let body_id = cx.tcx.hir().body_owned_by( - cx.tcx.hir().local_def_id( - impl_item_refs - .iter() - .find(|iiref| iiref.ident.as_str() == "get_lints") - .expect("LintPass needs to implement get_lints") - .id - .hir_id(), - ), + impl_item_refs + .iter() + .find(|iiref| iiref.ident.as_str() == "get_lints") + .expect("LintPass needs to implement get_lints") + .id + .owner_id + .def_id, ); collector.visit_expr(cx.tcx.hir().body(body_id).value); } 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 c4d8c28f0..b1b5164ff 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 @@ -14,6 +14,7 @@ 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::{ @@ -34,8 +35,10 @@ use std::path::Path; use std::path::PathBuf; use std::process::Command; -/// This is the output file of the lint collector. -const OUTPUT_FILE: &str = "../util/gh-pages/lints.json"; +/// This is the json output file of the lint collector. +const JSON_OUTPUT_FILE: &str = "../util/gh-pages/lints.json"; +/// This is the markdown output file of the lint collector. +const MARKDOWN_OUTPUT_FILE: &str = "../book/src/lint_configuration.md"; /// These lints are excluded from the export. const BLACK_LISTED_LINTS: &[&str] = &["lint_author", "dump_hir", "internal_metadata_collector"]; /// These groups will be ignored by the lint group matcher. This is useful for collections like @@ -176,6 +179,23 @@ This lint has the following configuration variables: ) }) } + + fn configs_to_markdown(&self, map_fn: fn(&ClippyConfiguration) -> String) -> String { + self.config + .iter() + .filter(|config| config.deprecation_reason.is_none()) + .filter(|config| !config.lints.is_empty()) + .map(map_fn) + .join("\n") + } + + fn get_markdown_docs(&self) -> String { + format!( + "## Lint Configuration Options\n| <div style=\"width:290px\">Option</div> | Default Value |\n|--|--|\n{}\n\n{}\n", + self.configs_to_markdown(ClippyConfiguration::to_markdown_table_entry), + self.configs_to_markdown(ClippyConfiguration::to_markdown_paragraph), + ) + } } impl Drop for MetadataCollector { @@ -199,12 +219,37 @@ impl Drop for MetadataCollector { collect_renames(&mut lints); - // Outputting - if Path::new(OUTPUT_FILE).exists() { - fs::remove_file(OUTPUT_FILE).unwrap(); + // Outputting json + if Path::new(JSON_OUTPUT_FILE).exists() { + fs::remove_file(JSON_OUTPUT_FILE).unwrap(); } - let mut file = OpenOptions::new().write(true).create(true).open(OUTPUT_FILE).unwrap(); + let mut file = OpenOptions::new() + .write(true) + .create(true) + .open(JSON_OUTPUT_FILE) + .unwrap(); writeln!(file, "{}", serde_json::to_string_pretty(&lints).unwrap()).unwrap(); + + // Outputting markdown + if Path::new(MARKDOWN_OUTPUT_FILE).exists() { + fs::remove_file(MARKDOWN_OUTPUT_FILE).unwrap(); + } + let mut file = OpenOptions::new() + .write(true) + .create(true) + .open(MARKDOWN_OUTPUT_FILE) + .unwrap(); + writeln!( + file, + "<!-- +This file is generated by `cargo collect-metadata`. +Please use that command to update the file and do not edit it by hand. +--> + +{}", + self.get_markdown_docs(), + ) + .unwrap(); } } @@ -505,6 +550,28 @@ impl ClippyConfiguration { deprecation_reason, } } + + fn to_markdown_paragraph(&self) -> String { + format!( + "### {}\n{}\n\n**Default Value:** `{}` (`{}`)\n\n{}\n\n", + self.name, + self.doc + .lines() + .map(|line| line.strip_prefix(" ").unwrap_or(line)) + .join("\n"), + self.default, + self.config_type, + self.lints + .iter() + .map(|name| name.to_string().split_whitespace().next().unwrap().to_string()) + .map(|name| format!("* [{name}](https://rust-lang.github.io/rust-clippy/master/index.html#{name})")) + .join("\n"), + ) + } + + fn to_markdown_table_entry(&self) -> String { + format!("| [{}](#{}) | `{}` |", self.name, self.name, self.default) + } } fn collect_configs() -> Vec<ClippyConfiguration> { 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 9876a8a76..09f0f0d0a 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 @@ -39,6 +39,7 @@ impl LateLintPass<'_> for MsrvAttrImpl { if self_ty_def.all_fields().any(|f| { cx.tcx .type_of(f.did) + .subst_identity() .walk() .filter(|t| matches!(t.unpack(), GenericArgKind::Type(_))) .any(|t| match_type(cx, t.expect_ty(), &paths::MSRV)) 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 714436363..b59ef4086 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 @@ -3,7 +3,7 @@ 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; +use rustc_data_structures::fx::{FxHashSet, FxIndexSet}; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_hir::def::{DefKind, Res}; @@ -44,7 +44,7 @@ impl_lint_pass!(UnnecessaryDefPath => [UNNECESSARY_DEF_PATH]); #[derive(Default)] pub struct UnnecessaryDefPath { - array_def_ids: FxHashSet<(DefId, Span)>, + array_def_ids: FxIndexSet<(DefId, Span)>, linted_def_ids: FxHashSet<DefId>, } @@ -229,11 +229,11 @@ fn path_to_matched_type(cx: &LateContext<'_>, expr: &hir::Expr<'_>) -> Option<Ve Res::Def(DefKind::Static(_), def_id) => read_mir_alloc_def_path( cx, cx.tcx.eval_static_initializer(def_id).ok()?.inner(), - cx.tcx.type_of(def_id), + cx.tcx.type_of(def_id).subst_identity(), ), Res::Def(DefKind::Const, def_id) => match cx.tcx.const_eval_poly(def_id).ok()? { ConstValue::ByRef { alloc, offset } if offset.bytes() == 0 => { - read_mir_alloc_def_path(cx, alloc.inner(), cx.tcx.type_of(def_id)) + read_mir_alloc_def_path(cx, alloc.inner(), cx.tcx.type_of(def_id).subst_identity()) }, _ => None, }, 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 6cf2a955f..93e4b023c 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 @@ -5,7 +5,7 @@ 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, TypeVisitable}; +use rustc_middle::ty::{Adt, Ty, TypeVisitableExt}; use rustc_session::{declare_lint_pass, declare_tool_lint}; use rustc_span::sym; diff --git a/src/tools/clippy/clippy_utils/Cargo.toml b/src/tools/clippy/clippy_utils/Cargo.toml index ac6a566b9..173469f6c 100644 --- a/src/tools/clippy/clippy_utils/Cargo.toml +++ b/src/tools/clippy/clippy_utils/Cargo.toml @@ -1,6 +1,6 @@ [package] name = "clippy_utils" -version = "0.1.68" +version = "0.1.69" edition = "2021" publish = false diff --git a/src/tools/clippy/clippy_utils/src/ast_utils.rs b/src/tools/clippy/clippy_utils/src/ast_utils.rs index 9d0263e93..d82098523 100644 --- a/src/tools/clippy/clippy_utils/src/ast_utils.rs +++ b/src/tools/clippy/clippy_utils/src/ast_utils.rs @@ -144,7 +144,8 @@ pub fn eq_expr(l: &Expr, r: &Expr) -> bool { (_, Paren(r)) => eq_expr(l, r), (Err, Err) => true, (Box(l), Box(r)) | (Try(l), Try(r)) | (Await(l), Await(r)) => eq_expr(l, r), - (Array(l), Array(r)) | (Tup(l), Tup(r)) => over(l, r, |l, r| eq_expr(l, r)), + (Array(l), Array(r)) => over(l, r, |l, r| eq_expr(l, r)), + (Tup(l), Tup(r)) => over(l, r, |l, r| eq_expr(l, r)), (Repeat(le, ls), Repeat(re, rs)) => eq_expr(le, re) && eq_expr(&ls.value, &rs.value), (Call(lc, la), Call(rc, ra)) => eq_expr(lc, rc) && over(la, ra, |l, r| eq_expr(l, r)), ( diff --git a/src/tools/clippy/clippy_utils/src/consts.rs b/src/tools/clippy/clippy_utils/src/consts.rs index a67bd8d46..bb8890dca 100644 --- a/src/tools/clippy/clippy_utils/src/consts.rs +++ b/src/tools/clippy/clippy_utils/src/consts.rs @@ -237,7 +237,7 @@ pub fn constant<'tcx>( typeck_results, param_env: lcx.param_env, needed_resolution: false, - substs: lcx.tcx.intern_substs(&[]), + substs: ty::List::empty(), }; cx.expr(e).map(|cst| (cst, cx.needed_resolution)) } @@ -306,7 +306,7 @@ pub fn constant_context<'a, 'tcx>( typeck_results, param_env: lcx.param_env, needed_resolution: false, - substs: lcx.tcx.intern_substs(&[]), + substs: ty::List::empty(), } } @@ -335,7 +335,7 @@ impl<'a, 'tcx> ConstEvalLateContext<'a, 'tcx> { ExprKind::Tup(tup) => self.multi(tup).map(Constant::Tuple), ExprKind::Repeat(value, _) => { let n = match self.typeck_results.expr_ty(e).kind() { - ty::Array(_, n) => n.try_eval_usize(self.lcx.tcx, self.lcx.param_env)?, + ty::Array(_, n) => n.try_eval_target_usize(self.lcx.tcx, self.lcx.param_env)?, _ => span_bug!(e.span, "typeck error"), }; self.expr(value).map(|v| Constant::Repeat(Box::new(v), n)) @@ -640,7 +640,7 @@ pub fn miri_to_const<'tcx>(tcx: TyCtxt<'tcx>, result: mir::ConstantKind<'tcx>) - }, mir::ConstantKind::Val(ConstValue::ByRef { alloc, offset: _ }, _) => match result.ty().kind() { ty::Array(sub_type, len) => match sub_type.kind() { - ty::Float(FloatTy::F32) => match len.kind().try_to_machine_usize(tcx) { + ty::Float(FloatTy::F32) => match len.kind().try_to_target_usize(tcx) { Some(len) => alloc .inner() .inspect_with_uninit_and_ptr_outside_interpreter(0..(4 * usize::try_from(len).unwrap())) @@ -651,7 +651,7 @@ pub fn miri_to_const<'tcx>(tcx: TyCtxt<'tcx>, result: mir::ConstantKind<'tcx>) - .map(Constant::Vec), _ => None, }, - ty::Float(FloatTy::F64) => match len.kind().try_to_machine_usize(tcx) { + ty::Float(FloatTy::F64) => match len.kind().try_to_target_usize(tcx) { Some(len) => alloc .inner() .inspect_with_uninit_and_ptr_outside_interpreter(0..(8 * usize::try_from(len).unwrap())) 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 967119369..ee2f816f1 100644 --- a/src/tools/clippy/clippy_utils/src/eager_or_lazy.rs +++ b/src/tools/clippy/clippy_utils/src/eager_or_lazy.rs @@ -50,7 +50,7 @@ fn fn_eagerness(cx: &LateContext<'_>, fn_id: DefId, name: Symbol, have_one_arg: let name = name.as_str(); let ty = match cx.tcx.impl_of_method(fn_id) { - Some(id) => cx.tcx.type_of(id), + Some(id) => cx.tcx.type_of(id).subst_identity(), None => return Lazy, }; @@ -71,7 +71,7 @@ fn fn_eagerness(cx: &LateContext<'_>, fn_id: DefId, name: Symbol, have_one_arg: .variants() .iter() .flat_map(|v| v.fields.iter()) - .any(|x| matches!(cx.tcx.type_of(x.did).peel_refs().kind(), ty::Param(_))) + .any(|x| matches!(cx.tcx.type_of(x.did).subst_identity().peel_refs().kind(), ty::Param(_))) && all_predicates_of(cx.tcx, fn_id).all(|(pred, _)| match pred.kind().skip_binder() { PredicateKind::Clause(ty::Clause::Trait(pred)) => cx.tcx.trait_def(pred.trait_ref.def_id).is_marker, _ => true, @@ -79,7 +79,7 @@ fn fn_eagerness(cx: &LateContext<'_>, fn_id: DefId, name: Symbol, have_one_arg: && subs.types().all(|x| matches!(x.peel_refs().kind(), ty::Param(_))) { // Limit the function to either `(self) -> bool` or `(&self) -> bool` - match &**cx.tcx.fn_sig(fn_id).skip_binder().inputs_and_output { + match &**cx.tcx.fn_sig(fn_id).subst_identity().skip_binder().inputs_and_output { [arg, res] if !arg.is_mutable_ptr() && arg.peel_refs() == ty && res.is_bool() => NoChange, _ => Lazy, } @@ -193,7 +193,7 @@ fn expr_eagerness<'tcx>(cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) -> EagernessS | ExprKind::Ret(_) | ExprKind::InlineAsm(_) | ExprKind::Yield(..) - | ExprKind::Err => { + | ExprKind::Err(_) => { self.eagerness = ForceNoChange; return; }, diff --git a/src/tools/clippy/clippy_utils/src/higher.rs b/src/tools/clippy/clippy_utils/src/higher.rs index 4604ae5c2..50bef3709 100644 --- a/src/tools/clippy/clippy_utils/src/higher.rs +++ b/src/tools/clippy/clippy_utils/src/higher.rs @@ -287,15 +287,12 @@ impl<'a> VecArgs<'a> { 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_chain! { - if let hir::ExprKind::Box(boxed) = args[0].kind; - if let hir::ExprKind::Array(args) = boxed.kind; - then { - return Some(VecArgs::Vec(args)); - } + if let hir::ExprKind::Call(_, [arg]) = &args[0].kind + && let hir::ExprKind::Array(args) = arg.kind { + Some(VecArgs::Vec(args)) + } else { + None } - - None } else if match_def_path(cx, fun_def_id, &paths::VEC_NEW) && args.is_empty() { Some(VecArgs::Vec(&[])) } else { diff --git a/src/tools/clippy/clippy_utils/src/hir_utils.rs b/src/tools/clippy/clippy_utils/src/hir_utils.rs index 2bbe1a19b..0603755f8 100644 --- a/src/tools/clippy/clippy_utils/src/hir_utils.rs +++ b/src/tools/clippy/clippy_utils/src/hir_utils.rs @@ -714,7 +714,7 @@ impl<'a, 'tcx> SpanlessHash<'a, 'tcx> { } self.hash_pat(pat); }, - ExprKind::Err => {}, + ExprKind::Err(_) => {}, ExprKind::Lit(ref l) => { l.node.hash(&mut self.s); }, @@ -986,7 +986,7 @@ impl<'a, 'tcx> SpanlessHash<'a, 'tcx> { TyKind::Typeof(anon_const) => { self.hash_body(anon_const.body); }, - TyKind::Err | TyKind::Infer | TyKind::Never => {}, + TyKind::Err(_) | TyKind::Infer | TyKind::Never => {}, } } diff --git a/src/tools/clippy/clippy_utils/src/lib.rs b/src/tools/clippy/clippy_utils/src/lib.rs index 7a4a9036d..f02f8ecb4 100644 --- a/src/tools/clippy/clippy_utils/src/lib.rs +++ b/src/tools/clippy/clippy_utils/src/lib.rs @@ -1,6 +1,5 @@ #![feature(array_chunks)] #![feature(box_patterns)] -#![feature(control_flow_enum)] #![feature(let_chains)] #![feature(lint_reasons)] #![feature(never_type)] @@ -105,7 +104,7 @@ use rustc_middle::ty::fast_reject::SimplifiedType::{ PtrSimplifiedType, SliceSimplifiedType, StrSimplifiedType, UintSimplifiedType, }; use rustc_middle::ty::{ - layout::IntegerExt, BorrowKind, ClosureKind, DefIdTree, Ty, TyCtxt, TypeAndMut, TypeVisitable, UpvarCapture, + layout::IntegerExt, BorrowKind, ClosureKind, DefIdTree, Ty, TyCtxt, TypeAndMut, TypeVisitableExt, UpvarCapture, }; use rustc_middle::ty::{FloatTy, IntTy, UintTy}; use rustc_span::hygiene::{ExpnKind, MacroKind}; @@ -318,7 +317,7 @@ pub fn match_trait_method(cx: &LateContext<'_>, expr: &Expr<'_>, path: &[&str]) /// Checks if a method is defined in an impl of a diagnostic item pub fn is_diag_item_method(cx: &LateContext<'_>, def_id: DefId, diag_item: Symbol) -> bool { if let Some(impl_did) = cx.tcx.impl_of_method(def_id) { - if let Some(adt) = cx.tcx.type_of(impl_did).ty_adt_def() { + if let Some(adt) = cx.tcx.type_of(impl_did).subst_identity().ty_adt_def() { return cx.tcx.is_diagnostic_item(diag_item, adt.did()); } } @@ -553,7 +552,7 @@ fn non_local_item_children_by_name(tcx: TyCtxt<'_>, def_id: DefId, name: Symbol) .filter(|item| item.ident.name == name) .map(|child| child.res.expect_non_local()) .collect(), - DefKind::Impl => tcx + DefKind::Impl { .. } => tcx .associated_item_def_ids(def_id) .iter() .copied() @@ -813,7 +812,7 @@ fn is_default_equivalent_ctor(cx: &LateContext<'_>, def_id: DefId, path: &QPath< if let QPath::TypeRelative(_, method) = path { if method.ident.name == sym::new { if let Some(impl_did) = cx.tcx.impl_of_method(def_id) { - if let Some(adt) = cx.tcx.type_of(impl_did).ty_adt_def() { + if let Some(adt) = cx.tcx.type_of(impl_did).subst_identity().ty_adt_def() { return std_types_symbols.iter().any(|&symbol| { cx.tcx.is_diagnostic_item(symbol, adt.did()) || Some(adt.did()) == cx.tcx.lang_items().string() }); @@ -1119,9 +1118,8 @@ pub fn can_move_expr_to_closure<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<' self.captures.entry(l).and_modify(|e| *e |= cap).or_insert(cap); } }, - ExprKind::Closure { .. } => { - let closure_id = self.cx.tcx.hir().local_def_id(e.hir_id); - for capture in self.cx.typeck_results().closure_min_captures_flattened(closure_id) { + ExprKind::Closure(closure) => { + for capture in self.cx.typeck_results().closure_min_captures_flattened(closure.def_id) { let local_id = match capture.place.base { PlaceBase::Local(id) => id, PlaceBase::Upvar(var) => var.var_path.hir_id, @@ -1379,7 +1377,7 @@ pub fn get_enclosing_loop_or_multi_call_closure<'tcx>( .chain(args.iter()) .position(|arg| arg.hir_id == id)?; let id = cx.typeck_results().type_dependent_def_id(e.hir_id)?; - let ty = cx.tcx.fn_sig(id).skip_binder().inputs()[i]; + let ty = cx.tcx.fn_sig(id).subst_identity().skip_binder().inputs()[i]; ty_is_fn_once_param(cx.tcx, ty, cx.tcx.param_env(id).caller_bounds()).then_some(()) }, _ => None, @@ -1578,16 +1576,14 @@ 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_item: hir::HirId) -> Ty<'tcx> { - let fn_def_id = cx.tcx.hir().local_def_id(fn_item); - let ret_ty = cx.tcx.fn_sig(fn_def_id).output(); +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).subst_identity().output(); cx.tcx.erase_late_bound_regions(ret_ty) } /// Convenience function to get the nth argument type of a function. -pub fn nth_arg<'tcx>(cx: &LateContext<'tcx>, fn_item: hir::HirId, nth: usize) -> Ty<'tcx> { - let fn_def_id = cx.tcx.hir().local_def_id(fn_item); - let arg = cx.tcx.fn_sig(fn_def_id).input(nth); +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).subst_identity().input(nth); cx.tcx.erase_late_bound_regions(arg) } @@ -2491,6 +2487,10 @@ pub fn span_extract_comment(sm: &SourceMap, span: Span) -> String { comments_buf.join("\n") } +pub fn span_find_starting_semi(sm: &SourceMap, span: Span) -> Span { + sm.span_take_while(span, |&ch| ch == ' ' || ch == ';') +} + macro_rules! op_utils { ($($name:ident $assign:ident)*) => { /// Binary operation traits like `LangItem::Add` diff --git a/src/tools/clippy/clippy_utils/src/macros.rs b/src/tools/clippy/clippy_utils/src/macros.rs index 77c5f1155..be6133d32 100644 --- a/src/tools/clippy/clippy_utils/src/macros.rs +++ b/src/tools/clippy/clippy_utils/src/macros.rs @@ -1,6 +1,5 @@ #![allow(clippy::similar_names)] // `expr` and `expn` -use crate::is_path_diagnostic_item; use crate::source::snippet_opt; use crate::visitors::{for_each_expr, Descend}; @@ -8,7 +7,7 @@ use arrayvec::ArrayVec; use itertools::{izip, Either, Itertools}; use rustc_ast::ast::LitKind; use rustc_hir::intravisit::{walk_expr, Visitor}; -use rustc_hir::{self as hir, Expr, ExprField, ExprKind, HirId, Node, QPath}; +use rustc_hir::{self as hir, Expr, ExprField, ExprKind, HirId, LangItem, Node, QPath, TyKind}; use rustc_lexer::unescape::unescape_literal; use rustc_lexer::{tokenize, unescape, LiteralKind, TokenKind}; use rustc_lint::LateContext; @@ -328,7 +327,7 @@ fn is_assert_arg(cx: &LateContext<'_>, expr: &Expr<'_>, assert_expn: ExpnId) -> } else { match cx.tcx.item_name(macro_call.def_id) { // `cfg!(debug_assertions)` in `debug_assert!` - sym::cfg => ControlFlow::CONTINUE, + sym::cfg => ControlFlow::Continue(()), // assert!(other_macro!(..)) _ => ControlFlow::Break(true), } @@ -392,11 +391,18 @@ impl FormatString { }; let mut unescaped = String::with_capacity(inner.len()); + // Sometimes the original string comes from a macro which accepts a malformed string, such as in a + // #[display(""somestring)] attribute (accepted by the `displaythis` crate). Reconstructing the + // string from the span will not be possible, so we will just return None here. + let mut unparsable = false; unescape_literal(inner, mode, &mut |_, ch| match ch { Ok(ch) => unescaped.push(ch), Err(e) if !e.is_fatal() => (), - Err(e) => panic!("{e:?}"), + Err(_) => unparsable = true, }); + if unparsable { + return None; + } let mut parts = Vec::new(); let _: Option<!> = for_each_expr(pieces, |expr| { @@ -439,8 +445,7 @@ impl<'tcx> FormatArgsValues<'tcx> { // ArgumentV1::from_usize(<val>) if let ExprKind::Call(callee, [val]) = expr.kind && let ExprKind::Path(QPath::TypeRelative(ty, _)) = callee.kind - && let hir::TyKind::Path(QPath::Resolved(_, path)) = ty.kind - && path.segments.last().unwrap().ident.name == sym::ArgumentV1 + && let TyKind::Path(QPath::LangItem(LangItem::FormatArgument, _, _)) = ty.kind { let val_idx = if val.span.ctxt() == expr.span.ctxt() && let ExprKind::Field(_, field) = val.kind @@ -486,20 +491,6 @@ struct ParamPosition { impl<'tcx> Visitor<'tcx> for ParamPosition { fn visit_expr_field(&mut self, field: &'tcx ExprField<'tcx>) { - fn parse_count(expr: &Expr<'_>) -> Option<usize> { - // ::core::fmt::rt::v1::Count::Param(1usize), - if let ExprKind::Call(ctor, [val]) = expr.kind - && let ExprKind::Path(QPath::Resolved(_, path)) = ctor.kind - && path.segments.last()?.ident.name == sym::Param - && let ExprKind::Lit(lit) = &val.kind - && let LitKind::Int(pos, _) = lit.node - { - Some(pos as usize) - } else { - None - } - } - match field.ident.name { sym::position => { if let ExprKind::Lit(lit) = &field.expr.kind @@ -519,15 +510,41 @@ impl<'tcx> Visitor<'tcx> for ParamPosition { } } +fn parse_count(expr: &Expr<'_>) -> Option<usize> { + // <::core::fmt::rt::v1::Count>::Param(1usize), + if let ExprKind::Call(ctor, [val]) = expr.kind + && let ExprKind::Path(QPath::TypeRelative(_, path)) = ctor.kind + && path.ident.name == sym::Param + && let ExprKind::Lit(lit) = &val.kind + && let LitKind::Int(pos, _) = lit.node + { + Some(pos as usize) + } else { + None + } +} + /// Parses the `fmt` arg of `Arguments::new_v1_formatted(pieces, args, fmt, _)` fn parse_rt_fmt<'tcx>(fmt_arg: &'tcx Expr<'tcx>) -> Option<impl Iterator<Item = ParamPosition> + 'tcx> { if let ExprKind::AddrOf(.., array) = fmt_arg.kind && let ExprKind::Array(specs) = array.kind { Some(specs.iter().map(|spec| { - let mut position = ParamPosition::default(); - position.visit_expr(spec); - position + if let ExprKind::Call(f, args) = spec.kind + && let ExprKind::Path(QPath::TypeRelative(ty, f)) = f.kind + && let TyKind::Path(QPath::LangItem(LangItem::FormatPlaceholder, _, _)) = ty.kind + && f.ident.name == sym::new + && let [position, _fill, _align, _flags, precision, width] = args + && let ExprKind::Lit(position) = &position.kind + && let LitKind::Int(position, _) = position.node { + ParamPosition { + value: position as usize, + width: parse_count(width), + precision: parse_count(precision), + } + } else { + ParamPosition::default() + } })) } else { None @@ -701,8 +718,8 @@ pub struct FormatSpec<'tcx> { pub fill: Option<char>, /// Optionally specified alignment. pub align: Alignment, - /// Packed version of various flags provided, see [`rustc_parse_format::Flag`]. - pub flags: u32, + /// Whether all flag options are set to default (no flags specified). + pub no_flags: bool, /// Represents either the maximum width or the integer precision. pub precision: Count<'tcx>, /// The minimum width, will be padded according to `width`/`align` @@ -718,7 +735,7 @@ impl<'tcx> FormatSpec<'tcx> { Some(Self { fill: spec.fill, align: spec.align, - flags: spec.flags, + no_flags: spec.sign.is_none() && !spec.alternate && !spec.zero_pad && spec.debug_hex.is_none(), precision: Count::new( FormatParamUsage::Precision, spec.precision, @@ -760,10 +777,7 @@ impl<'tcx> FormatSpec<'tcx> { /// Has no other formatting specifiers than setting the format trait. returns true for `{}`, /// `{foo}`, `{:?}`, but false for `{foo:5}`, `{3:.5?}` pub fn is_default_for_trait(&self) -> bool { - self.width.is_implied() - && self.precision.is_implied() - && self.align == Alignment::AlignUnknown - && self.flags == 0 + self.width.is_implied() && self.precision.is_implied() && self.align == Alignment::AlignUnknown && self.no_flags } } @@ -890,7 +904,7 @@ impl<'tcx> FormatArgsExpn<'tcx> { // ::core::fmt::Arguments::new_v1_formatted(pieces, args, fmt, _unsafe_arg) if let ExprKind::Call(callee, [pieces, args, rest @ ..]) = expr.kind && let ExprKind::Path(QPath::TypeRelative(ty, seg)) = callee.kind - && is_path_diagnostic_item(cx, ty, sym::Arguments) + && let TyKind::Path(QPath::LangItem(LangItem::FormatArguments, _, _)) = ty.kind && matches!(seg.ident.as_str(), "new_v1" | "new_v1_formatted") { let format_string = FormatString::new(cx, pieces)?; diff --git a/src/tools/clippy/clippy_utils/src/mir/possible_borrower.rs b/src/tools/clippy/clippy_utils/src/mir/possible_borrower.rs index 9adae7733..920ce8e65 100644 --- a/src/tools/clippy/clippy_utils/src/mir/possible_borrower.rs +++ b/src/tools/clippy/clippy_utils/src/mir/possible_borrower.rs @@ -4,7 +4,7 @@ use rustc_data_structures::fx::FxHashMap; use rustc_index::bit_set::{BitSet, HybridBitSet}; use rustc_lint::LateContext; use rustc_middle::mir::{self, visit::Visitor as _, Mutability}; -use rustc_middle::ty::{self, visit::TypeVisitor}; +use rustc_middle::ty::{self, visit::TypeVisitor, TyCtxt}; use rustc_mir_dataflow::{impls::MaybeStorageLive, Analysis, ResultsCursor}; use std::borrow::Cow; use std::ops::ControlFlow; @@ -136,11 +136,11 @@ impl<'a, 'b, 'tcx> mir::visit::Visitor<'tcx> for PossibleBorrowerVisitor<'a, 'b, struct ContainsRegion; -impl TypeVisitor<'_> for ContainsRegion { +impl TypeVisitor<TyCtxt<'_>> for ContainsRegion { type BreakTy = (); fn visit_region(&mut self, _: ty::Region<'_>) -> ControlFlow<Self::BreakTy> { - ControlFlow::BREAK + ControlFlow::Break(()) } } diff --git a/src/tools/clippy/clippy_utils/src/numeric_literal.rs b/src/tools/clippy/clippy_utils/src/numeric_literal.rs index 42bdfd482..c225398ad 100644 --- a/src/tools/clippy/clippy_utils/src/numeric_literal.rs +++ b/src/tools/clippy/clippy_utils/src/numeric_literal.rs @@ -186,7 +186,7 @@ impl<'a> NumericLiteral<'a> { // The exponent may have a sign, output it early, otherwise it will be // treated as a digit if digits.clone().next() == Some('-') { - let _ = digits.next(); + let _: Option<char> = digits.next(); output.push('-'); } diff --git a/src/tools/clippy/clippy_utils/src/paths.rs b/src/tools/clippy/clippy_utils/src/paths.rs index 95eebab75..4aae0f728 100644 --- a/src/tools/clippy/clippy_utils/src/paths.rs +++ b/src/tools/clippy/clippy_utils/src/paths.rs @@ -115,6 +115,7 @@ pub const STD_FS_CREATE_DIR: [&str; 3] = ["std", "fs", "create_dir"]; pub const STD_IO_SEEK: [&str; 3] = ["std", "io", "Seek"]; pub const STD_IO_SEEK_FROM_CURRENT: [&str; 4] = ["std", "io", "SeekFrom", "Current"]; pub const STD_IO_SEEKFROM_START: [&str; 4] = ["std", "io", "SeekFrom", "Start"]; +pub const STD_PROCESS_COMMAND: [&str; 3] = ["std", "process", "Command"]; pub const STRING_AS_MUT_STR: [&str; 4] = ["alloc", "string", "String", "as_mut_str"]; pub const STRING_AS_STR: [&str; 4] = ["alloc", "string", "String", "as_str"]; pub const STRING_NEW: [&str; 4] = ["alloc", "string", "String", "new"]; diff --git a/src/tools/clippy/clippy_utils/src/qualify_min_const_fn.rs b/src/tools/clippy/clippy_utils/src/qualify_min_const_fn.rs index e5d7da682..1a35fe050 100644 --- a/src/tools/clippy/clippy_utils/src/qualify_min_const_fn.rs +++ b/src/tools/clippy/clippy_utils/src/qualify_min_const_fn.rs @@ -30,12 +30,14 @@ pub fn is_min_const_fn<'tcx>(tcx: TyCtxt<'tcx>, body: &Body<'tcx>, msrv: &Msrv) ty::Clause::RegionOutlives(_) | ty::Clause::TypeOutlives(_) | ty::Clause::Projection(_) - | ty::Clause::Trait(..), + | ty::Clause::Trait(..) + | ty::Clause::ConstArgHasType(..), ) | ty::PredicateKind::WellFormed(_) | ty::PredicateKind::ConstEvaluatable(..) | ty::PredicateKind::ConstEquate(..) | ty::PredicateKind::TypeWellFormedFromEnv(..) => continue, + ty::PredicateKind::AliasEq(..) => panic!("alias eq predicate on function: {predicate:#?}"), ty::PredicateKind::ObjectSafe(_) => panic!("object safe predicate on function: {predicate:#?}"), ty::PredicateKind::ClosureKind(..) => panic!("closure kind predicate on function: {predicate:#?}"), ty::PredicateKind::Subtype(_) => panic!("subtype predicate on function: {predicate:#?}"), @@ -55,7 +57,7 @@ pub fn is_min_const_fn<'tcx>(tcx: TyCtxt<'tcx>, body: &Body<'tcx>, msrv: &Msrv) // impl trait is gone in MIR, so check the return type manually check_ty( tcx, - tcx.fn_sig(def_id).output().skip_binder(), + tcx.fn_sig(def_id).subst_identity().output().skip_binder(), body.local_decls.iter().next().unwrap().source_info.span, )?; @@ -240,6 +242,7 @@ fn check_statement<'tcx>( | StatementKind::Retag { .. } | StatementKind::AscribeUserType(..) | StatementKind::Coverage(..) + | StatementKind::ConstEvalCounter | StatementKind::Nop => Ok(()), } } diff --git a/src/tools/clippy/clippy_utils/src/sugg.rs b/src/tools/clippy/clippy_utils/src/sugg.rs index e7879bb19..07feadca2 100644 --- a/src/tools/clippy/clippy_utils/src/sugg.rs +++ b/src/tools/clippy/clippy_utils/src/sugg.rs @@ -20,7 +20,7 @@ use rustc_middle::mir::{FakeReadCause, Mutability}; use rustc_middle::ty; use rustc_span::source_map::{BytePos, CharPos, Pos, Span, SyntaxContext}; use std::borrow::Cow; -use std::fmt::{Display, Write as _}; +use std::fmt::{self, Display, Write as _}; use std::ops::{Add, Neg, Not, Sub}; /// A helper type to build suggestion correctly handling parentheses. @@ -157,7 +157,7 @@ impl<'a> Sugg<'a> { | hir::ExprKind::Ret(..) | hir::ExprKind::Struct(..) | hir::ExprKind::Tup(..) - | hir::ExprKind::Err => Sugg::NonParen(get_snippet(expr.span)), + | hir::ExprKind::Err(_) => Sugg::NonParen(get_snippet(expr.span)), hir::ExprKind::DropTemps(inner) => Self::hir_from_snippet(inner, get_snippet), hir::ExprKind::Assign(lhs, rhs, _) => { Sugg::BinOp(AssocOp::Assign, get_snippet(lhs.span), get_snippet(rhs.span)) @@ -219,6 +219,7 @@ impl<'a> Sugg<'a> { | ast::ExprKind::Repeat(..) | ast::ExprKind::Ret(..) | ast::ExprKind::Yeet(..) + | ast::ExprKind::FormatArgs(..) | ast::ExprKind::Struct(..) | ast::ExprKind::Try(..) | ast::ExprKind::TryBlock(..) @@ -808,7 +809,10 @@ pub struct DerefClosure { /// /// note: this only works on single line immutable closures with exactly one input parameter. pub fn deref_closure_args(cx: &LateContext<'_>, closure: &hir::Expr<'_>) -> Option<DerefClosure> { - if let hir::ExprKind::Closure(&Closure { fn_decl, body, .. }) = closure.kind { + if let hir::ExprKind::Closure(&Closure { + fn_decl, def_id, body, .. + }) = closure.kind + { let closure_body = cx.tcx.hir().body(body); // is closure arg a type annotated double reference (i.e.: `|x: &&i32| ...`) // a type annotation is present if param `kind` is different from `TyKind::Infer` @@ -828,10 +832,8 @@ pub fn deref_closure_args(cx: &LateContext<'_>, closure: &hir::Expr<'_>) -> Opti applicability: Applicability::MachineApplicable, }; - let fn_def_id = cx.tcx.hir().local_def_id(closure.hir_id); let infcx = cx.tcx.infer_ctxt().build(); - ExprUseVisitor::new(&mut visitor, &infcx, fn_def_id, cx.param_env, cx.typeck_results()) - .consume_body(closure_body); + ExprUseVisitor::new(&mut visitor, &infcx, def_id, cx.param_env, cx.typeck_results()).consume_body(closure_body); if !visitor.suggestion_start.is_empty() { return Some(DerefClosure { @@ -884,7 +886,7 @@ impl<'tcx> DerefDelegate<'_, 'tcx> { .cx .typeck_results() .type_dependent_def_id(parent_expr.hir_id) - .map(|did| self.cx.tcx.fn_sig(did).skip_binder()) + .map(|did| self.cx.tcx.fn_sig(did).subst_identity().skip_binder()) { std::iter::once(receiver) .chain(call_args.iter()) @@ -930,7 +932,7 @@ impl<'tcx> Delegate<'tcx> for DerefDelegate<'_, 'tcx> { if cmt.place.projections.is_empty() { // handle item without any projection, that needs an explicit borrowing // i.e.: suggest `&x` instead of `x` - let _ = write!(self.suggestion_start, "{start_snip}&{ident_str}"); + let _: fmt::Result = write!(self.suggestion_start, "{start_snip}&{ident_str}"); } else { // cases where a parent `Call` or `MethodCall` is using the item // i.e.: suggest `.contains(&x)` for `.find(|x| [1, 2, 3].contains(x)).is_none()` @@ -945,7 +947,7 @@ impl<'tcx> Delegate<'tcx> for DerefDelegate<'_, 'tcx> { // given expression is the self argument and will be handled completely by the compiler // i.e.: `|x| x.is_something()` ExprKind::MethodCall(_, self_expr, ..) if self_expr.hir_id == cmt.hir_id => { - let _ = write!(self.suggestion_start, "{start_snip}{ident_str_with_proj}"); + let _: fmt::Result = write!(self.suggestion_start, "{start_snip}{ident_str_with_proj}"); self.next_pos = span.hi(); return; }, @@ -1053,7 +1055,7 @@ impl<'tcx> Delegate<'tcx> for DerefDelegate<'_, 'tcx> { } } - let _ = write!(self.suggestion_start, "{start_snip}{replacement_str}"); + let _: fmt::Result = write!(self.suggestion_start, "{start_snip}{replacement_str}"); } self.next_pos = span.hi(); } diff --git a/src/tools/clippy/clippy_utils/src/ty.rs b/src/tools/clippy/clippy_utils/src/ty.rs index 99fba4fe7..25654e695 100644 --- a/src/tools/clippy/clippy_utils/src/ty.rs +++ b/src/tools/clippy/clippy_utils/src/ty.rs @@ -17,8 +17,8 @@ use rustc_lint::LateContext; use rustc_middle::mir::interpret::{ConstValue, Scalar}; use rustc_middle::ty::{ self, AdtDef, AliasTy, AssocKind, Binder, BoundRegion, DefIdTree, FnSig, IntTy, List, ParamEnv, Predicate, - PredicateKind, Region, RegionKind, SubstsRef, Ty, TyCtxt, TypeSuperVisitable, TypeVisitable, TypeVisitor, UintTy, - VariantDef, VariantDiscr, + PredicateKind, Region, RegionKind, SubstsRef, Ty, TyCtxt, TypeSuperVisitable, TypeVisitable, TypeVisitableExt, + TypeVisitor, UintTy, VariantDef, VariantDiscr, }; use rustc_middle::ty::{GenericArg, GenericArgKind}; use rustc_span::symbol::Ident; @@ -237,7 +237,7 @@ pub fn implements_trait_with_env<'tcx>( kind: TypeVariableOriginKind::MiscVariable, span: DUMMY_SP, }; - let ty_params = tcx.mk_substs( + let ty_params = tcx.mk_substs_from_iter( ty_params .into_iter() .map(|arg| arg.unwrap_or_else(|| infcx.next_ty_var(orig).into())), @@ -346,7 +346,7 @@ pub fn is_non_aggregate_primitive_type(ty: Ty<'_>) -> bool { pub fn is_recursively_primitive_type(ty: Ty<'_>) -> bool { match *ty.kind() { ty::Bool | ty::Char | ty::Int(_) | ty::Uint(_) | ty::Float(_) | ty::Str => true, - ty::Ref(_, inner, _) if *inner.kind() == ty::Str => true, + ty::Ref(_, inner, _) if inner.is_str() => true, ty::Array(inner_type, _) | ty::Slice(inner_type) => is_recursively_primitive_type(inner_type), ty::Tuple(inner_types) => inner_types.iter().all(is_recursively_primitive_type), _ => false, @@ -628,7 +628,7 @@ impl<'tcx> ExprFnSig<'tcx> { /// If the expression is function like, get the signature for it. pub fn expr_sig<'tcx>(cx: &LateContext<'tcx>, expr: &Expr<'_>) -> Option<ExprFnSig<'tcx>> { if let Res::Def(DefKind::Fn | DefKind::Ctor(_, CtorKind::Fn) | DefKind::AssocFn, id) = path_res(cx, expr) { - Some(ExprFnSig::Sig(cx.tcx.fn_sig(id), Some(id))) + Some(ExprFnSig::Sig(cx.tcx.fn_sig(id).subst_identity(), Some(id))) } else { ty_sig(cx, cx.typeck_results().expr_ty_adjusted(expr).peel_refs()) } @@ -646,10 +646,13 @@ pub fn ty_sig<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>) -> Option<ExprFnSig<'t .and_then(|id| cx.tcx.hir().fn_decl_by_hir_id(cx.tcx.hir().local_def_id_to_hir_id(id))); Some(ExprFnSig::Closure(decl, subs.as_closure().sig())) }, - ty::FnDef(id, subs) => Some(ExprFnSig::Sig(cx.tcx.bound_fn_sig(id).subst(cx.tcx, subs), Some(id))), - ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs, .. }) => { - sig_from_bounds(cx, ty, cx.tcx.item_bounds(def_id).subst(cx.tcx, substs), cx.tcx.opt_parent(def_id)) - }, + ty::FnDef(id, subs) => Some(ExprFnSig::Sig(cx.tcx.fn_sig(id).subst(cx.tcx, subs), Some(id))), + ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs, .. }) => sig_from_bounds( + cx, + ty, + cx.tcx.item_bounds(def_id).subst(cx.tcx, substs), + cx.tcx.opt_parent(def_id), + ), ty::FnPtr(sig) => Some(ExprFnSig::Sig(sig, None)), ty::Dynamic(bounds, _, _) => { let lang_items = cx.tcx.lang_items(); @@ -777,7 +780,7 @@ impl core::ops::Add<u32> for EnumValue { #[expect(clippy::cast_possible_truncation, clippy::cast_possible_wrap)] pub fn read_explicit_enum_value(tcx: TyCtxt<'_>, id: DefId) -> Option<EnumValue> { if let Ok(ConstValue::Scalar(Scalar::Int(value))) = tcx.const_eval_poly(id) { - match tcx.type_of(id).kind() { + match tcx.type_of(id).subst_identity().kind() { ty::Int(_) => Some(EnumValue::Signed(match value.size().bytes() { 1 => i128::from(value.assert_bits(Size::from_bytes(1)) as u8 as i8), 2 => i128::from(value.assert_bits(Size::from_bytes(2)) as u16 as i16), @@ -835,7 +838,7 @@ pub fn for_each_top_level_late_bound_region<B>( index: u32, f: F, } - impl<'tcx, B, F: FnMut(BoundRegion) -> ControlFlow<B>> TypeVisitor<'tcx> for V<F> { + 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() && idx.as_u32() == self.index { @@ -844,7 +847,7 @@ pub fn for_each_top_level_late_bound_region<B>( ControlFlow::Continue(()) } } - fn visit_binder<T: TypeVisitable<'tcx>>(&mut self, t: &Binder<'tcx, T>) -> ControlFlow<Self::BreakTy> { + fn visit_binder<T: TypeVisitable<TyCtxt<'tcx>>>(&mut self, t: &Binder<'tcx, T>) -> ControlFlow<Self::BreakTy> { self.index += 1; let res = t.super_visit_with(self); self.index -= 1; @@ -891,16 +894,29 @@ impl AdtVariantInfo { } /// Gets the struct or enum variant from the given `Res` -pub fn variant_of_res<'tcx>(cx: &LateContext<'tcx>, res: Res) -> Option<&'tcx VariantDef> { +pub fn adt_and_variant_of_res<'tcx>(cx: &LateContext<'tcx>, res: Res) -> Option<(AdtDef<'tcx>, &'tcx VariantDef)> { match res { - Res::Def(DefKind::Struct, id) => Some(cx.tcx.adt_def(id).non_enum_variant()), - Res::Def(DefKind::Variant, id) => Some(cx.tcx.adt_def(cx.tcx.parent(id)).variant_with_id(id)), - Res::Def(DefKind::Ctor(CtorOf::Struct, _), id) => Some(cx.tcx.adt_def(cx.tcx.parent(id)).non_enum_variant()), + Res::Def(DefKind::Struct, id) => { + let adt = cx.tcx.adt_def(id); + Some((adt, adt.non_enum_variant())) + }, + Res::Def(DefKind::Variant, id) => { + let adt = cx.tcx.adt_def(cx.tcx.parent(id)); + Some((adt, adt.variant_with_id(id))) + }, + Res::Def(DefKind::Ctor(CtorOf::Struct, _), id) => { + let adt = cx.tcx.adt_def(cx.tcx.parent(id)); + Some((adt, adt.non_enum_variant())) + }, Res::Def(DefKind::Ctor(CtorOf::Variant, _), id) => { let var_id = cx.tcx.parent(id); - Some(cx.tcx.adt_def(cx.tcx.parent(var_id)).variant_with_id(var_id)) + let adt = cx.tcx.adt_def(cx.tcx.parent(var_id)); + Some((adt, adt.variant_with_id(var_id))) + }, + Res::SelfCtor(id) => { + let adt = cx.tcx.type_of(id).subst_identity().ty_adt_def().unwrap(); + Some((adt, adt.non_enum_variant())) }, - Res::SelfCtor(id) => Some(cx.tcx.type_of(id).ty_adt_def().unwrap().non_enum_variant()), _ => None, } } @@ -946,7 +962,7 @@ pub fn approx_ty_size<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>) -> u64 { (Ok(size), _) => size, (Err(_), ty::Tuple(list)) => list.as_substs().types().map(|t| approx_ty_size(cx, t)).sum(), (Err(_), ty::Array(t, n)) => { - n.try_eval_usize(cx.tcx, cx.param_env).unwrap_or_default() * approx_ty_size(cx, *t) + n.try_eval_target_usize(cx.tcx, cx.param_env).unwrap_or_default() * approx_ty_size(cx, *t) }, (Err(_), ty::Adt(def, subst)) if def.is_struct() => def .variants() @@ -1062,7 +1078,7 @@ pub fn make_projection<'tcx>( tcx, container_id, assoc_ty, - tcx.mk_substs(substs.into_iter().map(Into::into)), + tcx.mk_substs_from_iter(substs.into_iter().map(Into::into)), ) } diff --git a/src/tools/clippy/clippy_utils/src/visitors.rs b/src/tools/clippy/clippy_utils/src/visitors.rs index 14c01a60b..d27a20bd4 100644 --- a/src/tools/clippy/clippy_utils/src/visitors.rs +++ b/src/tools/clippy/clippy_utils/src/visitors.rs @@ -392,12 +392,16 @@ pub fn is_expr_unsafe<'tcx>(cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) -> bool { .cx .typeck_results() .type_dependent_def_id(e.hir_id) - .map_or(false, |id| self.cx.tcx.fn_sig(id).unsafety() == Unsafety::Unsafe) => + .map_or(false, |id| { + self.cx.tcx.fn_sig(id).skip_binder().unsafety() == Unsafety::Unsafe + }) => { self.is_unsafe = true; }, ExprKind::Call(func, _) => match *self.cx.typeck_results().expr_ty(func).peel_refs().kind() { - ty::FnDef(id, _) if self.cx.tcx.fn_sig(id).unsafety() == Unsafety::Unsafe => self.is_unsafe = true, + ty::FnDef(id, _) if self.cx.tcx.fn_sig(id).skip_binder().unsafety() == Unsafety::Unsafe => { + self.is_unsafe = true; + }, ty::FnPtr(sig) if sig.unsafety() == Unsafety::Unsafe => self.is_unsafe = true, _ => walk_expr(self, e), }, @@ -661,7 +665,7 @@ pub fn for_each_unconsumed_temporary<'tcx, B>( | ExprKind::Path(_) | ExprKind::Continue(_) | ExprKind::InlineAsm(_) - | ExprKind::Err => (), + | ExprKind::Err(_) => (), } ControlFlow::Continue(()) } diff --git a/src/tools/clippy/declare_clippy_lint/Cargo.toml b/src/tools/clippy/declare_clippy_lint/Cargo.toml index c01e1062c..80eee3681 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 = "0.1.68" +version = "0.1.69" edition = "2021" publish = false diff --git a/src/tools/clippy/lintcheck/Cargo.toml b/src/tools/clippy/lintcheck/Cargo.toml index de31c16b8..653121af5 100644 --- a/src/tools/clippy/lintcheck/Cargo.toml +++ b/src/tools/clippy/lintcheck/Cargo.toml @@ -10,8 +10,8 @@ edition = "2021" publish = false [dependencies] -cargo_metadata = "0.14" -clap = "3.2" +cargo_metadata = "0.15.3" +clap = "4.1.4" crossbeam-channel = "0.5.6" flate2 = "1.0" rayon = "1.5.1" diff --git a/src/tools/clippy/lintcheck/src/config.rs b/src/tools/clippy/lintcheck/src/config.rs index b8824024e..e0244ddce 100644 --- a/src/tools/clippy/lintcheck/src/config.rs +++ b/src/tools/clippy/lintcheck/src/config.rs @@ -35,7 +35,7 @@ fn get_clap_config() -> ArgMatches { .long("markdown") .help("Change the reports table to use markdown links"), Arg::new("recursive") - .long("--recursive") + .long("recursive") .help("Run clippy on the dependencies of crates specified in crates-toml") .conflicts_with("threads") .conflicts_with("fix"), diff --git a/src/tools/clippy/lintcheck/src/main.rs b/src/tools/clippy/lintcheck/src/main.rs index bd49f0960..23c852980 100644 --- a/src/tools/clippy/lintcheck/src/main.rs +++ b/src/tools/clippy/lintcheck/src/main.rs @@ -17,9 +17,9 @@ use crate::recursive::LintcheckServer; use std::collections::{HashMap, HashSet}; use std::env; use std::env::consts::EXE_SUFFIX; -use std::fmt::Write as _; +use std::fmt::{self, Write as _}; use std::fs; -use std::io::ErrorKind; +use std::io::{self, ErrorKind}; use std::path::{Path, PathBuf}; use std::process::Command; use std::sync::atomic::{AtomicUsize, Ordering}; @@ -145,8 +145,8 @@ impl ClippyWarning { } let mut output = String::from("| "); - let _ = write!(output, "[`{file_with_pos}`]({file}#L{})", self.line); - let _ = write!(output, r#" | `{:<50}` | "{}" |"#, self.lint_type, self.message); + let _: fmt::Result = write!(output, "[`{file_with_pos}`]({file}#L{})", self.line); + let _: fmt::Result = write!(output, r#" | `{:<50}` | "{}" |"#, self.lint_type, self.message); output.push('\n'); output } else { @@ -632,7 +632,7 @@ fn main() { .unwrap(); let server = config.recursive.then(|| { - let _ = fs::remove_dir_all("target/lintcheck/shared_target_dir/recursive"); + let _: io::Result<()> = fs::remove_dir_all("target/lintcheck/shared_target_dir/recursive"); LintcheckServer::spawn(recursive_options) }); @@ -689,7 +689,7 @@ fn main() { write!(text, "{}", all_msgs.join("")).unwrap(); text.push_str("\n\n### ICEs:\n"); for (cratename, msg) in &ices { - let _ = write!(text, "{cratename}: '{msg}'"); + let _: fmt::Result = write!(text, "{cratename}: '{msg}'"); } println!("Writing logs to {}", config.lintcheck_results_path.display()); diff --git a/src/tools/clippy/rust-toolchain b/src/tools/clippy/rust-toolchain index 40a6f4709..cfe845ec7 100644 --- a/src/tools/clippy/rust-toolchain +++ b/src/tools/clippy/rust-toolchain @@ -1,3 +1,3 @@ [toolchain] -channel = "nightly-2023-01-12" +channel = "nightly-2023-02-25" 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 d521e8d88..dd183362f 100644 --- a/src/tools/clippy/src/driver.rs +++ b/src/tools/clippy/src/driver.rs @@ -209,7 +209,7 @@ fn report_clippy_ice(info: &panic::PanicInfo<'_>, bug_report_url: &str) { // Separate the output with an empty line eprintln!(); - let fallback_bundle = rustc_errors::fallback_fluent_bundle(rustc_errors::DEFAULT_LOCALE_RESOURCES, false); + let fallback_bundle = rustc_errors::fallback_fluent_bundle(rustc_driver::DEFAULT_LOCALE_RESOURCES.to_vec(), false); let emitter = Box::new(rustc_errors::emitter::EmitterWriter::stderr( rustc_errors::ColorConfig::Auto, None, @@ -220,6 +220,7 @@ fn report_clippy_ice(info: &panic::PanicInfo<'_>, bug_report_url: &str) { None, false, false, + rustc_errors::TerminalUrl::No, )); let handler = rustc_errors::Handler::with_emitter(true, None, emitter); diff --git a/src/tools/clippy/src/main.rs b/src/tools/clippy/src/main.rs index 7a78b3262..82147eba3 100644 --- a/src/tools/clippy/src/main.rs +++ b/src/tools/clippy/src/main.rs @@ -28,7 +28,7 @@ with: -D --deny OPT Set lint denied -F --forbid OPT Set lint forbidden -You can use tool lints to allow or deny lints from your code, eg.: +You can use tool lints to allow or deny lints from your code, e.g.: #[allow(clippy::needless_lifetimes)] "#; diff --git a/src/tools/clippy/tests/ui-internal/custom_ice_message.rs b/src/tools/clippy/tests/ui-internal/custom_ice_message.rs index 4be04f77f..837811bdf 100644 --- a/src/tools/clippy/tests/ui-internal/custom_ice_message.rs +++ b/src/tools/clippy/tests/ui-internal/custom_ice_message.rs @@ -1,8 +1,9 @@ // rustc-env:RUST_BACKTRACE=0 // normalize-stderr-test: "Clippy version: .*" -> "Clippy version: foo" -// normalize-stderr-test: "internal_lints.rs:\d*:\d*" -> "internal_lints.rs" +// normalize-stderr-test: "produce_ice.rs:\d*:\d*" -> "produce_ice.rs" // normalize-stderr-test: "', .*clippy_lints" -> "', clippy_lints" // normalize-stderr-test: "'rustc'" -> "'<unnamed>'" +// normalize-stderr-test: "(?ms)query stack during panic:\n.*end of query stack\n" -> "" #![deny(clippy::internal)] #![allow(clippy::missing_clippy_version_attribute)] diff --git a/src/tools/clippy/tests/ui-internal/custom_ice_message.stderr b/src/tools/clippy/tests/ui-internal/custom_ice_message.stderr index 2ba589066..7ed0ef027 100644 --- a/src/tools/clippy/tests/ui-internal/custom_ice_message.stderr +++ b/src/tools/clippy/tests/ui-internal/custom_ice_message.stderr @@ -1,4 +1,4 @@ -thread '<unnamed>' panicked at 'Would you like some help with that?', clippy_lints/src/utils/internal_lints/produce_ice.rs:28:9 +thread '<unnamed>' panicked at 'Would you like some help with that?', clippy_lints/src/utils/internal_lints/produce_ice.rs note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace error: internal compiler error: unexpected panic @@ -9,5 +9,3 @@ note: we would appreciate a bug report: https://github.com/rust-lang/rust-clippy note: Clippy version: foo -query stack during panic: -end of query stack diff --git a/src/tools/clippy/tests/ui-toml/expect_used/expect_used.rs b/src/tools/clippy/tests/ui-toml/expect_used/expect_used.rs index bff97d97d..89f142a15 100644 --- a/src/tools/clippy/tests/ui-toml/expect_used/expect_used.rs +++ b/src/tools/clippy/tests/ui-toml/expect_used/expect_used.rs @@ -16,6 +16,18 @@ fn main() { expect_result(); } +#[test] +fn test_expect_option() { + let opt = Some(0); + let _ = opt.expect(""); +} + +#[test] +fn test_expect_result() { + let res: Result<u8, ()> = Ok(0); + let _ = res.expect(""); +} + #[cfg(test)] mod issue9612 { // should not lint in `#[cfg(test)]` modules diff --git a/src/tools/clippy/tests/ui-toml/pub_crate_missing_docs/clippy.toml b/src/tools/clippy/tests/ui-toml/pub_crate_missing_docs/clippy.toml new file mode 100644 index 000000000..ec210a987 --- /dev/null +++ b/src/tools/clippy/tests/ui-toml/pub_crate_missing_docs/clippy.toml @@ -0,0 +1 @@ +missing-docs-in-crate-items = true diff --git a/src/tools/clippy/tests/ui-toml/pub_crate_missing_docs/pub_crate_missing_doc.rs b/src/tools/clippy/tests/ui-toml/pub_crate_missing_docs/pub_crate_missing_doc.rs new file mode 100644 index 000000000..830d71f61 --- /dev/null +++ b/src/tools/clippy/tests/ui-toml/pub_crate_missing_docs/pub_crate_missing_doc.rs @@ -0,0 +1,59 @@ +//! this is crate +#![allow(missing_docs)] +#![warn(clippy::missing_docs_in_private_items)] + +/// this is mod +mod my_mod { + /// some docs + fn priv_with_docs() {} + fn priv_no_docs() {} + /// some docs + pub(crate) fn crate_with_docs() {} + pub(crate) fn crate_no_docs() {} + /// some docs + pub(super) fn super_with_docs() {} + pub(super) fn super_no_docs() {} + + mod my_sub { + /// some docs + fn sub_priv_with_docs() {} + fn sub_priv_no_docs() {} + /// some docs + pub(crate) fn sub_crate_with_docs() {} + pub(crate) fn sub_crate_no_docs() {} + /// some docs + pub(super) fn sub_super_with_docs() {} + pub(super) fn sub_super_no_docs() {} + } + + /// some docs + pub(crate) struct CrateStructWithDocs { + /// some docs + pub(crate) crate_field_with_docs: (), + pub(crate) crate_field_no_docs: (), + /// some docs + priv_field_with_docs: (), + priv_field_no_docs: (), + } + + pub(crate) struct CrateStructNoDocs { + /// some docs + pub(crate) crate_field_with_docs: (), + pub(crate) crate_field_no_docs: (), + /// some docs + priv_field_with_docs: (), + priv_field_no_docs: (), + } +} + +/// some docs +type CrateTypedefWithDocs = String; +type CrateTypedefNoDocs = String; +/// some docs +pub type PubTypedefWithDocs = String; +pub type PubTypedefNoDocs = String; + +fn main() { + my_mod::crate_with_docs(); + my_mod::crate_no_docs(); +} diff --git a/src/tools/clippy/tests/ui-toml/pub_crate_missing_docs/pub_crate_missing_doc.stderr b/src/tools/clippy/tests/ui-toml/pub_crate_missing_docs/pub_crate_missing_doc.stderr new file mode 100644 index 000000000..a47418705 --- /dev/null +++ b/src/tools/clippy/tests/ui-toml/pub_crate_missing_docs/pub_crate_missing_doc.stderr @@ -0,0 +1,52 @@ +error: missing documentation for a function + --> $DIR/pub_crate_missing_doc.rs:12:5 + | +LL | pub(crate) fn crate_no_docs() {} + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: `-D clippy::missing-docs-in-private-items` implied by `-D warnings` + +error: missing documentation for a function + --> $DIR/pub_crate_missing_doc.rs:15:5 + | +LL | pub(super) fn super_no_docs() {} + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +error: missing documentation for a function + --> $DIR/pub_crate_missing_doc.rs:23:9 + | +LL | pub(crate) fn sub_crate_no_docs() {} + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +error: missing documentation for a struct field + --> $DIR/pub_crate_missing_doc.rs:33:9 + | +LL | pub(crate) crate_field_no_docs: (), + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +error: missing documentation for a struct + --> $DIR/pub_crate_missing_doc.rs:39:5 + | +LL | / pub(crate) struct CrateStructNoDocs { +LL | | /// some docs +LL | | pub(crate) crate_field_with_docs: (), +LL | | pub(crate) crate_field_no_docs: (), +... | +LL | | priv_field_no_docs: (), +LL | | } + | |_____^ + +error: missing documentation for a struct field + --> $DIR/pub_crate_missing_doc.rs:42:9 + | +LL | pub(crate) crate_field_no_docs: (), + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +error: missing documentation for a type alias + --> $DIR/pub_crate_missing_doc.rs:51:1 + | +LL | type CrateTypedefNoDocs = String; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +error: aborting due to 7 previous errors + diff --git a/src/tools/clippy/tests/ui-toml/toml_unknown_key/conf_unknown_key.stderr b/src/tools/clippy/tests/ui-toml/toml_unknown_key/conf_unknown_key.stderr index a22c6a5a0..6a246afac 100644 --- a/src/tools/clippy/tests/ui-toml/toml_unknown_key/conf_unknown_key.stderr +++ b/src/tools/clippy/tests/ui-toml/toml_unknown_key/conf_unknown_key.stderr @@ -33,6 +33,7 @@ error: error reading Clippy's configuration file `$DIR/clippy.toml`: unknown fie max-struct-bools max-suggested-slice-pattern-length max-trait-bounds + missing-docs-in-crate-items msrv pass-by-value-size-limit single-char-binding-names-threshold diff --git a/src/tools/clippy/tests/ui-toml/unwrap_used/unwrap_used.rs b/src/tools/clippy/tests/ui-toml/unwrap_used/unwrap_used.rs index bc8e8c1f0..6525ea5bf 100644 --- a/src/tools/clippy/tests/ui-toml/unwrap_used/unwrap_used.rs +++ b/src/tools/clippy/tests/ui-toml/unwrap_used/unwrap_used.rs @@ -66,6 +66,12 @@ fn main() { } } +#[test] +fn test() { + let boxed_slice: Box<[u8]> = Box::new([0, 1, 2, 3]); + let _ = boxed_slice.get(1).unwrap(); +} + #[cfg(test)] mod issue9612 { // should not lint in `#[cfg(test)]` modules diff --git a/src/tools/clippy/tests/ui-toml/unwrap_used/unwrap_used.stderr b/src/tools/clippy/tests/ui-toml/unwrap_used/unwrap_used.stderr index 94b5ef663..8a32750e3 100644 --- a/src/tools/clippy/tests/ui-toml/unwrap_used/unwrap_used.stderr +++ b/src/tools/clippy/tests/ui-toml/unwrap_used/unwrap_used.stderr @@ -188,10 +188,16 @@ LL | let _ = some_vec.get_mut(0..1).unwrap().to_vec(); = help: if you don't want to handle the `None` case gracefully, consider using `expect()` to provide a better panic message error: called `.get().unwrap()` on a slice. Using `[]` is more clear and more concise - --> $DIR/unwrap_used.rs:84:17 + --> $DIR/unwrap_used.rs:72:13 + | +LL | let _ = boxed_slice.get(1).unwrap(); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&boxed_slice[1]` + +error: called `.get().unwrap()` on a slice. Using `[]` is more clear and more concise + --> $DIR/unwrap_used.rs:90:17 | LL | let _ = Box::new([0]).get(1).unwrap(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&Box::new([0])[1]` -error: aborting due to 27 previous errors +error: aborting due to 28 previous errors diff --git a/src/tools/clippy/tests/ui/arithmetic_side_effects.rs b/src/tools/clippy/tests/ui/arithmetic_side_effects.rs index 918cf81c6..2611e3a78 100644 --- a/src/tools/clippy/tests/ui/arithmetic_side_effects.rs +++ b/src/tools/clippy/tests/ui/arithmetic_side_effects.rs @@ -13,6 +13,9 @@ use core::num::{Saturating, Wrapping}; +const ONE: i32 = 1; +const ZERO: i32 = 0; + #[derive(Clone, Copy)] pub struct Custom; @@ -182,6 +185,10 @@ pub fn non_overflowing_ops_or_ops_already_handled_by_the_compiler_should_not_tri _n += &0; _n -= 0; _n -= &0; + _n += ZERO; + _n += &ZERO; + _n -= ZERO; + _n -= &ZERO; _n /= 99; _n /= &99; _n %= 99; @@ -190,10 +197,18 @@ pub fn non_overflowing_ops_or_ops_already_handled_by_the_compiler_should_not_tri _n *= &0; _n *= 1; _n *= &1; + _n *= ZERO; + _n *= &ZERO; + _n *= ONE; + _n *= &ONE; _n += -0; _n += &-0; _n -= -0; _n -= &-0; + _n += -ZERO; + _n += &-ZERO; + _n -= -ZERO; + _n -= &-ZERO; _n /= -99; _n /= &-99; _n %= -99; @@ -208,10 +223,18 @@ pub fn non_overflowing_ops_or_ops_already_handled_by_the_compiler_should_not_tri _n = _n + &0; _n = 0 + _n; _n = &0 + _n; + _n = _n + ZERO; + _n = _n + &ZERO; + _n = ZERO + _n; + _n = &ZERO + _n; _n = _n - 0; _n = _n - &0; _n = 0 - _n; _n = &0 - _n; + _n = _n - ZERO; + _n = _n - &ZERO; + _n = ZERO - _n; + _n = &ZERO - _n; _n = _n / 99; _n = _n / &99; _n = _n % 99; @@ -222,6 +245,10 @@ pub fn non_overflowing_ops_or_ops_already_handled_by_the_compiler_should_not_tri _n = &0 * _n; _n = _n * 1; _n = _n * &1; + _n = ZERO * _n; + _n = &ZERO * _n; + _n = _n * ONE; + _n = _n * &ONE; _n = 1 * _n; _n = &1 * _n; _n = 23 + 85; diff --git a/src/tools/clippy/tests/ui/arithmetic_side_effects.stderr b/src/tools/clippy/tests/ui/arithmetic_side_effects.stderr index 5e349f6b4..17a2448fb 100644 --- a/src/tools/clippy/tests/ui/arithmetic_side_effects.stderr +++ b/src/tools/clippy/tests/ui/arithmetic_side_effects.stderr @@ -1,5 +1,5 @@ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:243:5 + --> $DIR/arithmetic_side_effects.rs:270:5 | LL | _n += 1; | ^^^^^^^ @@ -7,589 +7,589 @@ LL | _n += 1; = note: `-D clippy::arithmetic-side-effects` implied by `-D warnings` error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:244:5 + --> $DIR/arithmetic_side_effects.rs:271:5 | LL | _n += &1; | ^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:245:5 + --> $DIR/arithmetic_side_effects.rs:272:5 | LL | _n -= 1; | ^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:246:5 + --> $DIR/arithmetic_side_effects.rs:273:5 | LL | _n -= &1; | ^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:247:5 + --> $DIR/arithmetic_side_effects.rs:274:5 | LL | _n /= 0; | ^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:248:5 + --> $DIR/arithmetic_side_effects.rs:275:5 | LL | _n /= &0; | ^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:249:5 + --> $DIR/arithmetic_side_effects.rs:276:5 | LL | _n %= 0; | ^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:250:5 + --> $DIR/arithmetic_side_effects.rs:277:5 | LL | _n %= &0; | ^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:251:5 + --> $DIR/arithmetic_side_effects.rs:278:5 | LL | _n *= 2; | ^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:252:5 + --> $DIR/arithmetic_side_effects.rs:279:5 | LL | _n *= &2; | ^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:253:5 + --> $DIR/arithmetic_side_effects.rs:280:5 | LL | _n += -1; | ^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:254:5 + --> $DIR/arithmetic_side_effects.rs:281:5 | LL | _n += &-1; | ^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:255:5 + --> $DIR/arithmetic_side_effects.rs:282:5 | LL | _n -= -1; | ^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:256:5 + --> $DIR/arithmetic_side_effects.rs:283:5 | LL | _n -= &-1; | ^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:257:5 + --> $DIR/arithmetic_side_effects.rs:284:5 | LL | _n /= -0; | ^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:258:5 + --> $DIR/arithmetic_side_effects.rs:285:5 | LL | _n /= &-0; | ^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:259:5 + --> $DIR/arithmetic_side_effects.rs:286:5 | LL | _n %= -0; | ^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:260:5 + --> $DIR/arithmetic_side_effects.rs:287:5 | LL | _n %= &-0; | ^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:261:5 + --> $DIR/arithmetic_side_effects.rs:288:5 | LL | _n *= -2; | ^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:262:5 + --> $DIR/arithmetic_side_effects.rs:289:5 | LL | _n *= &-2; | ^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:263:5 + --> $DIR/arithmetic_side_effects.rs:290:5 | LL | _custom += Custom; | ^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:264:5 + --> $DIR/arithmetic_side_effects.rs:291:5 | LL | _custom += &Custom; | ^^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:265:5 + --> $DIR/arithmetic_side_effects.rs:292:5 | LL | _custom -= Custom; | ^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:266:5 + --> $DIR/arithmetic_side_effects.rs:293:5 | LL | _custom -= &Custom; | ^^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:267:5 + --> $DIR/arithmetic_side_effects.rs:294:5 | LL | _custom /= Custom; | ^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:268:5 + --> $DIR/arithmetic_side_effects.rs:295:5 | LL | _custom /= &Custom; | ^^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:269:5 + --> $DIR/arithmetic_side_effects.rs:296:5 | LL | _custom %= Custom; | ^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:270:5 + --> $DIR/arithmetic_side_effects.rs:297:5 | LL | _custom %= &Custom; | ^^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:271:5 + --> $DIR/arithmetic_side_effects.rs:298:5 | LL | _custom *= Custom; | ^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:272:5 + --> $DIR/arithmetic_side_effects.rs:299:5 | LL | _custom *= &Custom; | ^^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:273:5 + --> $DIR/arithmetic_side_effects.rs:300:5 | LL | _custom += -Custom; | ^^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:274:5 + --> $DIR/arithmetic_side_effects.rs:301:5 | LL | _custom += &-Custom; | ^^^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:275:5 + --> $DIR/arithmetic_side_effects.rs:302:5 | LL | _custom -= -Custom; | ^^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:276:5 + --> $DIR/arithmetic_side_effects.rs:303:5 | LL | _custom -= &-Custom; | ^^^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:277:5 + --> $DIR/arithmetic_side_effects.rs:304:5 | LL | _custom /= -Custom; | ^^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:278:5 + --> $DIR/arithmetic_side_effects.rs:305:5 | LL | _custom /= &-Custom; | ^^^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:279:5 + --> $DIR/arithmetic_side_effects.rs:306:5 | LL | _custom %= -Custom; | ^^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:280:5 + --> $DIR/arithmetic_side_effects.rs:307:5 | LL | _custom %= &-Custom; | ^^^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:281:5 + --> $DIR/arithmetic_side_effects.rs:308:5 | LL | _custom *= -Custom; | ^^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:282:5 + --> $DIR/arithmetic_side_effects.rs:309:5 | LL | _custom *= &-Custom; | ^^^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:285:10 + --> $DIR/arithmetic_side_effects.rs:312:10 | LL | _n = _n + 1; | ^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:286:10 + --> $DIR/arithmetic_side_effects.rs:313:10 | LL | _n = _n + &1; | ^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:287:10 + --> $DIR/arithmetic_side_effects.rs:314:10 | LL | _n = 1 + _n; | ^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:288:10 + --> $DIR/arithmetic_side_effects.rs:315:10 | LL | _n = &1 + _n; | ^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:289:10 + --> $DIR/arithmetic_side_effects.rs:316:10 | LL | _n = _n - 1; | ^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:290:10 + --> $DIR/arithmetic_side_effects.rs:317:10 | LL | _n = _n - &1; | ^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:291:10 + --> $DIR/arithmetic_side_effects.rs:318:10 | LL | _n = 1 - _n; | ^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:292:10 + --> $DIR/arithmetic_side_effects.rs:319:10 | LL | _n = &1 - _n; | ^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:293:10 + --> $DIR/arithmetic_side_effects.rs:320:10 | LL | _n = _n / 0; | ^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:294:10 + --> $DIR/arithmetic_side_effects.rs:321:10 | LL | _n = _n / &0; | ^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:295:10 + --> $DIR/arithmetic_side_effects.rs:322:10 | LL | _n = _n % 0; | ^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:296:10 + --> $DIR/arithmetic_side_effects.rs:323:10 | LL | _n = _n % &0; | ^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:297:10 + --> $DIR/arithmetic_side_effects.rs:324:10 | LL | _n = _n * 2; | ^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:298:10 + --> $DIR/arithmetic_side_effects.rs:325:10 | LL | _n = _n * &2; | ^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:299:10 + --> $DIR/arithmetic_side_effects.rs:326:10 | LL | _n = 2 * _n; | ^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:300:10 + --> $DIR/arithmetic_side_effects.rs:327:10 | LL | _n = &2 * _n; | ^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:301:10 + --> $DIR/arithmetic_side_effects.rs:328:10 | LL | _n = 23 + &85; | ^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:302:10 + --> $DIR/arithmetic_side_effects.rs:329:10 | LL | _n = &23 + 85; | ^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:303:10 + --> $DIR/arithmetic_side_effects.rs:330:10 | LL | _n = &23 + &85; | ^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:304:15 + --> $DIR/arithmetic_side_effects.rs:331:15 | LL | _custom = _custom + _custom; | ^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:305:15 + --> $DIR/arithmetic_side_effects.rs:332:15 | LL | _custom = _custom + &_custom; | ^^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:306:15 + --> $DIR/arithmetic_side_effects.rs:333:15 | LL | _custom = Custom + _custom; | ^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:307:15 + --> $DIR/arithmetic_side_effects.rs:334:15 | LL | _custom = &Custom + _custom; | ^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:308:15 + --> $DIR/arithmetic_side_effects.rs:335:15 | LL | _custom = _custom - Custom; | ^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:309:15 + --> $DIR/arithmetic_side_effects.rs:336:15 | LL | _custom = _custom - &Custom; | ^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:310:15 + --> $DIR/arithmetic_side_effects.rs:337:15 | LL | _custom = Custom - _custom; | ^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:311:15 + --> $DIR/arithmetic_side_effects.rs:338:15 | LL | _custom = &Custom - _custom; | ^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:312:15 + --> $DIR/arithmetic_side_effects.rs:339:15 | LL | _custom = _custom / Custom; | ^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:313:15 + --> $DIR/arithmetic_side_effects.rs:340:15 | LL | _custom = _custom / &Custom; | ^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:314:15 + --> $DIR/arithmetic_side_effects.rs:341:15 | LL | _custom = _custom % Custom; | ^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:315:15 + --> $DIR/arithmetic_side_effects.rs:342:15 | LL | _custom = _custom % &Custom; | ^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:316:15 + --> $DIR/arithmetic_side_effects.rs:343:15 | LL | _custom = _custom * Custom; | ^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:317:15 + --> $DIR/arithmetic_side_effects.rs:344:15 | LL | _custom = _custom * &Custom; | ^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:318:15 + --> $DIR/arithmetic_side_effects.rs:345:15 | LL | _custom = Custom * _custom; | ^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:319:15 + --> $DIR/arithmetic_side_effects.rs:346:15 | LL | _custom = &Custom * _custom; | ^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:320:15 + --> $DIR/arithmetic_side_effects.rs:347:15 | LL | _custom = Custom + &Custom; | ^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:321:15 + --> $DIR/arithmetic_side_effects.rs:348:15 | LL | _custom = &Custom + Custom; | ^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:322:15 + --> $DIR/arithmetic_side_effects.rs:349:15 | LL | _custom = &Custom + &Custom; | ^^^^^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:325:10 + --> $DIR/arithmetic_side_effects.rs:352:10 | LL | _n = -_n; | ^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:326:10 + --> $DIR/arithmetic_side_effects.rs:353:10 | LL | _n = -&_n; | ^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:327:15 + --> $DIR/arithmetic_side_effects.rs:354:15 | LL | _custom = -_custom; | ^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:328:15 + --> $DIR/arithmetic_side_effects.rs:355:15 | LL | _custom = -&_custom; | ^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:337:5 + --> $DIR/arithmetic_side_effects.rs:364:5 | LL | 1 + i; | ^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:338:5 + --> $DIR/arithmetic_side_effects.rs:365:5 | LL | i * 2; | ^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:340:5 + --> $DIR/arithmetic_side_effects.rs:367:5 | LL | i - 2 + 2 - i; | ^^^^^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:341:5 + --> $DIR/arithmetic_side_effects.rs:368:5 | LL | -i; | ^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:342:5 + --> $DIR/arithmetic_side_effects.rs:369:5 | LL | i >> 1; | ^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:343:5 + --> $DIR/arithmetic_side_effects.rs:370:5 | LL | i << 1; | ^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:352:5 + --> $DIR/arithmetic_side_effects.rs:379:5 | LL | i += 1; | ^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:353:5 + --> $DIR/arithmetic_side_effects.rs:380:5 | LL | i -= 1; | ^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:354:5 + --> $DIR/arithmetic_side_effects.rs:381:5 | LL | i *= 2; | ^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:356:5 + --> $DIR/arithmetic_side_effects.rs:383:5 | LL | i /= 0; | ^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:358:5 + --> $DIR/arithmetic_side_effects.rs:385:5 | LL | i /= var1; | ^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:359:5 + --> $DIR/arithmetic_side_effects.rs:386:5 | LL | i /= var2; | ^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:361:5 + --> $DIR/arithmetic_side_effects.rs:388:5 | LL | i %= 0; | ^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:363:5 + --> $DIR/arithmetic_side_effects.rs:390:5 | LL | i %= var1; | ^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:364:5 + --> $DIR/arithmetic_side_effects.rs:391:5 | LL | i %= var2; | ^^^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:365:5 + --> $DIR/arithmetic_side_effects.rs:392:5 | LL | i <<= 3; | ^^^^^^^ error: arithmetic operation that can potentially result in unexpected side-effects - --> $DIR/arithmetic_side_effects.rs:366:5 + --> $DIR/arithmetic_side_effects.rs:393:5 | LL | i >>= 2; | ^^^^^^^ diff --git a/src/tools/clippy/tests/ui/auxiliary/macro_rules.rs b/src/tools/clippy/tests/ui/auxiliary/macro_rules.rs index 1e5f20e8c..a13af5652 100644 --- a/src/tools/clippy/tests/ui/auxiliary/macro_rules.rs +++ b/src/tools/clippy/tests/ui/auxiliary/macro_rules.rs @@ -149,3 +149,22 @@ macro_rules! almost_complete_range { let _ = '0'..'9'; }; } + +#[macro_export] +macro_rules! unsafe_macro { + () => { + unsafe { + *core::ptr::null::<()>(); + *core::ptr::null::<()>(); + } + }; +} + +#[macro_export] +macro_rules! needless_lifetime { + () => { + fn needless_lifetime<'a>(x: &'a u8) -> &'a u8 { + unimplemented!() + } + }; +} diff --git a/src/tools/clippy/tests/ui/bool_assert_comparison.fixed b/src/tools/clippy/tests/ui/bool_assert_comparison.fixed new file mode 100644 index 000000000..b8dd92906 --- /dev/null +++ b/src/tools/clippy/tests/ui/bool_assert_comparison.fixed @@ -0,0 +1,171 @@ +// run-rustfix + +#![allow(unused, clippy::assertions_on_constants)] +#![warn(clippy::bool_assert_comparison)] + +use std::ops::Not; + +macro_rules! a { + () => { + true + }; +} +macro_rules! b { + () => { + true + }; +} + +// Implements the Not trait but with an output type +// that's not bool. Should not suggest a rewrite +#[derive(Debug, Clone, Copy)] +enum ImplNotTraitWithoutBool { + VariantX(bool), + VariantY(u32), +} + +impl PartialEq<bool> for ImplNotTraitWithoutBool { + fn eq(&self, other: &bool) -> bool { + match *self { + ImplNotTraitWithoutBool::VariantX(b) => b == *other, + _ => false, + } + } +} + +impl Not for ImplNotTraitWithoutBool { + type Output = Self; + + fn not(self) -> Self::Output { + match self { + ImplNotTraitWithoutBool::VariantX(b) => ImplNotTraitWithoutBool::VariantX(!b), + ImplNotTraitWithoutBool::VariantY(0) => ImplNotTraitWithoutBool::VariantY(1), + ImplNotTraitWithoutBool::VariantY(_) => ImplNotTraitWithoutBool::VariantY(0), + } + } +} + +// This type implements the Not trait with an Output of +// type bool. Using assert!(..) must be suggested +#[derive(Debug, Clone, Copy)] +struct ImplNotTraitWithBool; + +impl PartialEq<bool> for ImplNotTraitWithBool { + fn eq(&self, other: &bool) -> bool { + false + } +} + +impl Not for ImplNotTraitWithBool { + type Output = bool; + + fn not(self) -> Self::Output { + true + } +} + +#[derive(Debug)] +struct NonCopy; + +impl PartialEq<bool> for NonCopy { + fn eq(&self, other: &bool) -> bool { + false + } +} + +impl Not for NonCopy { + type Output = bool; + + fn not(self) -> Self::Output { + true + } +} + +fn main() { + let a = ImplNotTraitWithoutBool::VariantX(true); + let b = ImplNotTraitWithBool; + + assert_eq!("a".len(), 1); + assert!(!"a".is_empty()); + assert!("".is_empty()); + assert!("".is_empty()); + assert_eq!(a!(), b!()); + assert_eq!(a!(), "".is_empty()); + assert_eq!("".is_empty(), b!()); + assert_eq!(a, true); + assert!(b); + + assert_ne!("a".len(), 1); + assert!("a".is_empty()); + assert!(!"".is_empty()); + assert!(!"".is_empty()); + assert_ne!(a!(), b!()); + assert_ne!(a!(), "".is_empty()); + assert_ne!("".is_empty(), b!()); + assert_ne!(a, true); + assert!(!b); + + debug_assert_eq!("a".len(), 1); + debug_assert!(!"a".is_empty()); + debug_assert!("".is_empty()); + debug_assert!("".is_empty()); + debug_assert_eq!(a!(), b!()); + debug_assert_eq!(a!(), "".is_empty()); + debug_assert_eq!("".is_empty(), b!()); + debug_assert_eq!(a, true); + debug_assert!(b); + + debug_assert_ne!("a".len(), 1); + debug_assert!("a".is_empty()); + debug_assert!(!"".is_empty()); + debug_assert!(!"".is_empty()); + debug_assert_ne!(a!(), b!()); + debug_assert_ne!(a!(), "".is_empty()); + debug_assert_ne!("".is_empty(), b!()); + debug_assert_ne!(a, true); + debug_assert!(!b); + + // assert with error messages + assert_eq!("a".len(), 1, "tadam {}", 1); + assert_eq!("a".len(), 1, "tadam {}", true); + assert!(!"a".is_empty(), "tadam {}", 1); + assert!(!"a".is_empty(), "tadam {}", true); + assert!(!"a".is_empty(), "tadam {}", true); + assert_eq!(a, true, "tadam {}", false); + + debug_assert_eq!("a".len(), 1, "tadam {}", 1); + debug_assert_eq!("a".len(), 1, "tadam {}", true); + debug_assert!(!"a".is_empty(), "tadam {}", 1); + debug_assert!(!"a".is_empty(), "tadam {}", true); + debug_assert!(!"a".is_empty(), "tadam {}", true); + debug_assert_eq!(a, true, "tadam {}", false); + + assert!(a!()); + assert!(b!()); + + use debug_assert_eq as renamed; + renamed!(a, true); + debug_assert!(b); + + let non_copy = NonCopy; + assert_eq!(non_copy, true); + // changing the above to `assert!(non_copy)` would cause a `borrow of moved value` + println!("{non_copy:?}"); + + macro_rules! in_macro { + ($v:expr) => {{ + assert_eq!($v, true); + }}; + } + in_macro!(a); + + assert!("".is_empty()); + assert!("".is_empty()); + assert!(!"requires negation".is_empty()); + assert!(!"requires negation".is_empty()); + + debug_assert!("".is_empty()); + debug_assert!("".is_empty()); + debug_assert!(!"requires negation".is_empty()); + debug_assert!(!"requires negation".is_empty()); +} diff --git a/src/tools/clippy/tests/ui/bool_assert_comparison.rs b/src/tools/clippy/tests/ui/bool_assert_comparison.rs index ec4d6f3ff..0a8ad34fd 100644 --- a/src/tools/clippy/tests/ui/bool_assert_comparison.rs +++ b/src/tools/clippy/tests/ui/bool_assert_comparison.rs @@ -1,3 +1,6 @@ +// run-rustfix + +#![allow(unused, clippy::assertions_on_constants)] #![warn(clippy::bool_assert_comparison)] use std::ops::Not; @@ -15,7 +18,7 @@ macro_rules! b { // Implements the Not trait but with an output type // that's not bool. Should not suggest a rewrite -#[derive(Debug)] +#[derive(Debug, Clone, Copy)] enum ImplNotTraitWithoutBool { VariantX(bool), VariantY(u32), @@ -44,7 +47,7 @@ impl Not for ImplNotTraitWithoutBool { // This type implements the Not trait with an Output of // type bool. Using assert!(..) must be suggested -#[derive(Debug)] +#[derive(Debug, Clone, Copy)] struct ImplNotTraitWithBool; impl PartialEq<bool> for ImplNotTraitWithBool { @@ -61,6 +64,23 @@ impl Not for ImplNotTraitWithBool { } } +#[derive(Debug)] +struct NonCopy; + +impl PartialEq<bool> for NonCopy { + fn eq(&self, other: &bool) -> bool { + false + } +} + +impl Not for NonCopy { + type Output = bool; + + fn not(self) -> Self::Output { + true + } +} + fn main() { let a = ImplNotTraitWithoutBool::VariantX(true); let b = ImplNotTraitWithBool; @@ -119,4 +139,33 @@ fn main() { debug_assert_eq!("a".is_empty(), false, "tadam {}", true); debug_assert_eq!(false, "a".is_empty(), "tadam {}", true); debug_assert_eq!(a, true, "tadam {}", false); + + assert_eq!(a!(), true); + assert_eq!(true, b!()); + + use debug_assert_eq as renamed; + renamed!(a, true); + renamed!(b, true); + + let non_copy = NonCopy; + assert_eq!(non_copy, true); + // changing the above to `assert!(non_copy)` would cause a `borrow of moved value` + println!("{non_copy:?}"); + + macro_rules! in_macro { + ($v:expr) => {{ + assert_eq!($v, true); + }}; + } + in_macro!(a); + + assert_eq!("".is_empty(), true); + assert_ne!("".is_empty(), false); + assert_ne!("requires negation".is_empty(), true); + assert_eq!("requires negation".is_empty(), false); + + debug_assert_eq!("".is_empty(), true); + debug_assert_ne!("".is_empty(), false); + debug_assert_ne!("requires negation".is_empty(), true); + debug_assert_eq!("requires negation".is_empty(), false); } diff --git a/src/tools/clippy/tests/ui/bool_assert_comparison.stderr b/src/tools/clippy/tests/ui/bool_assert_comparison.stderr index 377d51be4..89cefc95a 100644 --- a/src/tools/clippy/tests/ui/bool_assert_comparison.stderr +++ b/src/tools/clippy/tests/ui/bool_assert_comparison.stderr @@ -1,136 +1,399 @@ error: used `assert_eq!` with a literal bool - --> $DIR/bool_assert_comparison.rs:69:5 + --> $DIR/bool_assert_comparison.rs:89:5 | LL | assert_eq!("a".is_empty(), false); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `assert!(..)` + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: `-D clippy::bool-assert-comparison` implied by `-D warnings` +help: replace it with `assert!(..)` + | +LL - assert_eq!("a".is_empty(), false); +LL + assert!(!"a".is_empty()); + | error: used `assert_eq!` with a literal bool - --> $DIR/bool_assert_comparison.rs:70:5 + --> $DIR/bool_assert_comparison.rs:90:5 | LL | assert_eq!("".is_empty(), true); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `assert!(..)` + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `assert!(..)` + | +LL - assert_eq!("".is_empty(), true); +LL + assert!("".is_empty()); + | error: used `assert_eq!` with a literal bool - --> $DIR/bool_assert_comparison.rs:71:5 + --> $DIR/bool_assert_comparison.rs:91:5 | LL | assert_eq!(true, "".is_empty()); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `assert!(..)` + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `assert!(..)` + | +LL - assert_eq!(true, "".is_empty()); +LL + assert!("".is_empty()); + | error: used `assert_eq!` with a literal bool - --> $DIR/bool_assert_comparison.rs:76:5 + --> $DIR/bool_assert_comparison.rs:96:5 | LL | assert_eq!(b, true); - | ^^^^^^^^^^^^^^^^^^^ help: replace it with: `assert!(..)` + | ^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `assert!(..)` + | +LL - assert_eq!(b, true); +LL + assert!(b); + | error: used `assert_ne!` with a literal bool - --> $DIR/bool_assert_comparison.rs:79:5 + --> $DIR/bool_assert_comparison.rs:99:5 | LL | assert_ne!("a".is_empty(), false); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `assert!(..)` + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `assert!(..)` + | +LL - assert_ne!("a".is_empty(), false); +LL + assert!("a".is_empty()); + | error: used `assert_ne!` with a literal bool - --> $DIR/bool_assert_comparison.rs:80:5 + --> $DIR/bool_assert_comparison.rs:100:5 | LL | assert_ne!("".is_empty(), true); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `assert!(..)` + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `assert!(..)` + | +LL - assert_ne!("".is_empty(), true); +LL + assert!(!"".is_empty()); + | error: used `assert_ne!` with a literal bool - --> $DIR/bool_assert_comparison.rs:81:5 + --> $DIR/bool_assert_comparison.rs:101:5 | LL | assert_ne!(true, "".is_empty()); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `assert!(..)` + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `assert!(..)` + | +LL - assert_ne!(true, "".is_empty()); +LL + assert!(!"".is_empty()); + | error: used `assert_ne!` with a literal bool - --> $DIR/bool_assert_comparison.rs:86:5 + --> $DIR/bool_assert_comparison.rs:106:5 | LL | assert_ne!(b, true); - | ^^^^^^^^^^^^^^^^^^^ help: replace it with: `assert!(..)` + | ^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `assert!(..)` + | +LL - assert_ne!(b, true); +LL + assert!(!b); + | error: used `debug_assert_eq!` with a literal bool - --> $DIR/bool_assert_comparison.rs:89:5 + --> $DIR/bool_assert_comparison.rs:109:5 | LL | debug_assert_eq!("a".is_empty(), false); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `debug_assert!(..)` + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `debug_assert!(..)` + | +LL - debug_assert_eq!("a".is_empty(), false); +LL + debug_assert!(!"a".is_empty()); + | error: used `debug_assert_eq!` with a literal bool - --> $DIR/bool_assert_comparison.rs:90:5 + --> $DIR/bool_assert_comparison.rs:110:5 | LL | debug_assert_eq!("".is_empty(), true); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `debug_assert!(..)` + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `debug_assert!(..)` + | +LL - debug_assert_eq!("".is_empty(), true); +LL + debug_assert!("".is_empty()); + | error: used `debug_assert_eq!` with a literal bool - --> $DIR/bool_assert_comparison.rs:91:5 + --> $DIR/bool_assert_comparison.rs:111:5 | LL | debug_assert_eq!(true, "".is_empty()); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `debug_assert!(..)` + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `debug_assert!(..)` + | +LL - debug_assert_eq!(true, "".is_empty()); +LL + debug_assert!("".is_empty()); + | error: used `debug_assert_eq!` with a literal bool - --> $DIR/bool_assert_comparison.rs:96:5 + --> $DIR/bool_assert_comparison.rs:116:5 | LL | debug_assert_eq!(b, true); - | ^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `debug_assert!(..)` + | ^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `debug_assert!(..)` + | +LL - debug_assert_eq!(b, true); +LL + debug_assert!(b); + | error: used `debug_assert_ne!` with a literal bool - --> $DIR/bool_assert_comparison.rs:99:5 + --> $DIR/bool_assert_comparison.rs:119:5 | LL | debug_assert_ne!("a".is_empty(), false); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `debug_assert!(..)` + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `debug_assert!(..)` + | +LL - debug_assert_ne!("a".is_empty(), false); +LL + debug_assert!("a".is_empty()); + | error: used `debug_assert_ne!` with a literal bool - --> $DIR/bool_assert_comparison.rs:100:5 + --> $DIR/bool_assert_comparison.rs:120:5 | LL | debug_assert_ne!("".is_empty(), true); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `debug_assert!(..)` + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `debug_assert!(..)` + | +LL - debug_assert_ne!("".is_empty(), true); +LL + debug_assert!(!"".is_empty()); + | error: used `debug_assert_ne!` with a literal bool - --> $DIR/bool_assert_comparison.rs:101:5 + --> $DIR/bool_assert_comparison.rs:121:5 | LL | debug_assert_ne!(true, "".is_empty()); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `debug_assert!(..)` + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `debug_assert!(..)` + | +LL - debug_assert_ne!(true, "".is_empty()); +LL + debug_assert!(!"".is_empty()); + | error: used `debug_assert_ne!` with a literal bool - --> $DIR/bool_assert_comparison.rs:106:5 + --> $DIR/bool_assert_comparison.rs:126:5 | LL | debug_assert_ne!(b, true); - | ^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `debug_assert!(..)` + | ^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `debug_assert!(..)` + | +LL - debug_assert_ne!(b, true); +LL + debug_assert!(!b); + | error: used `assert_eq!` with a literal bool - --> $DIR/bool_assert_comparison.rs:111:5 + --> $DIR/bool_assert_comparison.rs:131:5 | LL | assert_eq!("a".is_empty(), false, "tadam {}", 1); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `assert!(..)` + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `assert!(..)` + | +LL - assert_eq!("a".is_empty(), false, "tadam {}", 1); +LL + assert!(!"a".is_empty(), "tadam {}", 1); + | error: used `assert_eq!` with a literal bool - --> $DIR/bool_assert_comparison.rs:112:5 + --> $DIR/bool_assert_comparison.rs:132:5 | LL | assert_eq!("a".is_empty(), false, "tadam {}", true); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `assert!(..)` + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `assert!(..)` + | +LL - assert_eq!("a".is_empty(), false, "tadam {}", true); +LL + assert!(!"a".is_empty(), "tadam {}", true); + | error: used `assert_eq!` with a literal bool - --> $DIR/bool_assert_comparison.rs:113:5 + --> $DIR/bool_assert_comparison.rs:133:5 | LL | assert_eq!(false, "a".is_empty(), "tadam {}", true); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `assert!(..)` + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `assert!(..)` + | +LL - assert_eq!(false, "a".is_empty(), "tadam {}", true); +LL + assert!(!"a".is_empty(), "tadam {}", true); + | error: used `debug_assert_eq!` with a literal bool - --> $DIR/bool_assert_comparison.rs:118:5 + --> $DIR/bool_assert_comparison.rs:138:5 | LL | debug_assert_eq!("a".is_empty(), false, "tadam {}", 1); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `debug_assert!(..)` + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `debug_assert!(..)` + | +LL - debug_assert_eq!("a".is_empty(), false, "tadam {}", 1); +LL + debug_assert!(!"a".is_empty(), "tadam {}", 1); + | error: used `debug_assert_eq!` with a literal bool - --> $DIR/bool_assert_comparison.rs:119:5 + --> $DIR/bool_assert_comparison.rs:139:5 | LL | debug_assert_eq!("a".is_empty(), false, "tadam {}", true); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `debug_assert!(..)` + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `debug_assert!(..)` + | +LL - debug_assert_eq!("a".is_empty(), false, "tadam {}", true); +LL + debug_assert!(!"a".is_empty(), "tadam {}", true); + | error: used `debug_assert_eq!` with a literal bool - --> $DIR/bool_assert_comparison.rs:120:5 + --> $DIR/bool_assert_comparison.rs:140:5 | LL | debug_assert_eq!(false, "a".is_empty(), "tadam {}", true); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `debug_assert!(..)` + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `debug_assert!(..)` + | +LL - debug_assert_eq!(false, "a".is_empty(), "tadam {}", true); +LL + debug_assert!(!"a".is_empty(), "tadam {}", true); + | + +error: used `assert_eq!` with a literal bool + --> $DIR/bool_assert_comparison.rs:143:5 + | +LL | assert_eq!(a!(), true); + | ^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `assert!(..)` + | +LL - assert_eq!(a!(), true); +LL + assert!(a!()); + | + +error: used `assert_eq!` with a literal bool + --> $DIR/bool_assert_comparison.rs:144:5 + | +LL | assert_eq!(true, b!()); + | ^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `assert!(..)` + | +LL - assert_eq!(true, b!()); +LL + assert!(b!()); + | + +error: used `debug_assert_eq!` with a literal bool + --> $DIR/bool_assert_comparison.rs:148:5 + | +LL | renamed!(b, true); + | ^^^^^^^^^^^^^^^^^ + | +help: replace it with `debug_assert!(..)` + | +LL - renamed!(b, true); +LL + debug_assert!(b); + | + +error: used `assert_eq!` with a literal bool + --> $DIR/bool_assert_comparison.rs:162:5 + | +LL | assert_eq!("".is_empty(), true); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `assert!(..)` + | +LL - assert_eq!("".is_empty(), true); +LL + assert!("".is_empty()); + | + +error: used `assert_ne!` with a literal bool + --> $DIR/bool_assert_comparison.rs:163:5 + | +LL | assert_ne!("".is_empty(), false); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `assert!(..)` + | +LL - assert_ne!("".is_empty(), false); +LL + assert!("".is_empty()); + | + +error: used `assert_ne!` with a literal bool + --> $DIR/bool_assert_comparison.rs:164:5 + | +LL | assert_ne!("requires negation".is_empty(), true); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `assert!(..)` + | +LL - assert_ne!("requires negation".is_empty(), true); +LL + assert!(!"requires negation".is_empty()); + | + +error: used `assert_eq!` with a literal bool + --> $DIR/bool_assert_comparison.rs:165:5 + | +LL | assert_eq!("requires negation".is_empty(), false); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `assert!(..)` + | +LL - assert_eq!("requires negation".is_empty(), false); +LL + assert!(!"requires negation".is_empty()); + | + +error: used `debug_assert_eq!` with a literal bool + --> $DIR/bool_assert_comparison.rs:167:5 + | +LL | debug_assert_eq!("".is_empty(), true); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `debug_assert!(..)` + | +LL - debug_assert_eq!("".is_empty(), true); +LL + debug_assert!("".is_empty()); + | + +error: used `debug_assert_ne!` with a literal bool + --> $DIR/bool_assert_comparison.rs:168:5 + | +LL | debug_assert_ne!("".is_empty(), false); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `debug_assert!(..)` + | +LL - debug_assert_ne!("".is_empty(), false); +LL + debug_assert!("".is_empty()); + | + +error: used `debug_assert_ne!` with a literal bool + --> $DIR/bool_assert_comparison.rs:169:5 + | +LL | debug_assert_ne!("requires negation".is_empty(), true); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `debug_assert!(..)` + | +LL - debug_assert_ne!("requires negation".is_empty(), true); +LL + debug_assert!(!"requires negation".is_empty()); + | + +error: used `debug_assert_eq!` with a literal bool + --> $DIR/bool_assert_comparison.rs:170:5 + | +LL | debug_assert_eq!("requires negation".is_empty(), false); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `debug_assert!(..)` + | +LL - debug_assert_eq!("requires negation".is_empty(), false); +LL + debug_assert!(!"requires negation".is_empty()); + | -error: aborting due to 22 previous errors +error: aborting due to 33 previous errors diff --git a/src/tools/clippy/tests/ui/box_default.fixed b/src/tools/clippy/tests/ui/box_default.fixed index 7e9f074fd..59c0baf87 100644 --- a/src/tools/clippy/tests/ui/box_default.fixed +++ b/src/tools/clippy/tests/ui/box_default.fixed @@ -33,6 +33,7 @@ fn main() { let _vec4: Box<_> = Box::<Vec<bool>>::default(); let _more = ret_ty_fn(); call_ty_fn(Box::default()); + issue_10381(); } fn ret_ty_fn() -> Box<bool> { @@ -65,3 +66,20 @@ fn issue_10089() { let _ = Box::<WeirdPathed>::default(); }; } + +fn issue_10381() { + #[derive(Default)] + pub struct Foo {} + pub trait Bar {} + impl Bar for Foo {} + + fn maybe_get_bar(i: u32) -> Option<Box<dyn Bar>> { + if i % 2 == 0 { + Some(Box::<Foo>::default()) + } else { + None + } + } + + assert!(maybe_get_bar(2).is_some()); +} diff --git a/src/tools/clippy/tests/ui/box_default.rs b/src/tools/clippy/tests/ui/box_default.rs index 5c8d0b835..f7d832193 100644 --- a/src/tools/clippy/tests/ui/box_default.rs +++ b/src/tools/clippy/tests/ui/box_default.rs @@ -33,6 +33,7 @@ fn main() { let _vec4: Box<_> = Box::new(Vec::from([false; 0])); let _more = ret_ty_fn(); call_ty_fn(Box::new(u8::default())); + issue_10381(); } fn ret_ty_fn() -> Box<bool> { @@ -65,3 +66,20 @@ fn issue_10089() { let _ = Box::new(WeirdPathed::default()); }; } + +fn issue_10381() { + #[derive(Default)] + pub struct Foo {} + pub trait Bar {} + impl Bar for Foo {} + + fn maybe_get_bar(i: u32) -> Option<Box<dyn Bar>> { + if i % 2 == 0 { + Some(Box::new(Foo::default())) + } else { + None + } + } + + assert!(maybe_get_bar(2).is_some()); +} diff --git a/src/tools/clippy/tests/ui/box_default.stderr b/src/tools/clippy/tests/ui/box_default.stderr index 249eb340f..78e17b9f0 100644 --- a/src/tools/clippy/tests/ui/box_default.stderr +++ b/src/tools/clippy/tests/ui/box_default.stderr @@ -73,22 +73,28 @@ LL | call_ty_fn(Box::new(u8::default())); | ^^^^^^^^^^^^^^^^^^^^^^^ help: try: `Box::default()` error: `Box::new(_)` of default value - --> $DIR/box_default.rs:39:5 + --> $DIR/box_default.rs:40:5 | LL | Box::new(bool::default()) | ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `Box::<bool>::default()` error: `Box::new(_)` of default value - --> $DIR/box_default.rs:56:28 + --> $DIR/box_default.rs:57:28 | LL | let _: Box<dyn Read> = Box::new(ImplementsDefault::default()); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `Box::<ImplementsDefault>::default()` error: `Box::new(_)` of default value - --> $DIR/box_default.rs:65:17 + --> $DIR/box_default.rs:66:17 | LL | let _ = Box::new(WeirdPathed::default()); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `Box::<WeirdPathed>::default()` -error: aborting due to 15 previous errors +error: `Box::new(_)` of default value + --> $DIR/box_default.rs:78:18 + | +LL | Some(Box::new(Foo::default())) + | ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `Box::<Foo>::default()` + +error: aborting due to 16 previous errors diff --git a/src/tools/clippy/tests/ui/bytes_nth.fixed b/src/tools/clippy/tests/ui/bytes_nth.fixed index b1fb2e16b..a35c679af 100644 --- a/src/tools/clippy/tests/ui/bytes_nth.fixed +++ b/src/tools/clippy/tests/ui/bytes_nth.fixed @@ -5,7 +5,7 @@ fn main() { let s = String::from("String"); - let _ = s.as_bytes().get(3); - let _ = &s.as_bytes().get(3); - let _ = s[..].as_bytes().get(3); + let _ = s.as_bytes().get(3).copied(); + let _ = &s.as_bytes()[3]; + let _ = s[..].as_bytes().get(3).copied(); } diff --git a/src/tools/clippy/tests/ui/bytes_nth.rs b/src/tools/clippy/tests/ui/bytes_nth.rs index 034c54e6a..1ecffea53 100644 --- a/src/tools/clippy/tests/ui/bytes_nth.rs +++ b/src/tools/clippy/tests/ui/bytes_nth.rs @@ -6,6 +6,6 @@ fn main() { let s = String::from("String"); let _ = s.bytes().nth(3); - let _ = &s.bytes().nth(3); + let _ = &s.bytes().nth(3).unwrap(); let _ = s[..].bytes().nth(3); } diff --git a/src/tools/clippy/tests/ui/bytes_nth.stderr b/src/tools/clippy/tests/ui/bytes_nth.stderr index 9851d4791..e8b150278 100644 --- a/src/tools/clippy/tests/ui/bytes_nth.stderr +++ b/src/tools/clippy/tests/ui/bytes_nth.stderr @@ -2,21 +2,21 @@ error: called `.bytes().nth()` on a `String` --> $DIR/bytes_nth.rs:8:13 | LL | let _ = s.bytes().nth(3); - | ^^^^^^^^^^^^^^^^ help: try: `s.as_bytes().get(3)` + | ^^^^^^^^^^^^^^^^ help: try: `s.as_bytes().get(3).copied()` | = note: `-D clippy::bytes-nth` implied by `-D warnings` -error: called `.bytes().nth()` on a `String` +error: called `.bytes().nth().unwrap()` on a `String` --> $DIR/bytes_nth.rs:9:14 | -LL | let _ = &s.bytes().nth(3); - | ^^^^^^^^^^^^^^^^ help: try: `s.as_bytes().get(3)` +LL | let _ = &s.bytes().nth(3).unwrap(); + | ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `s.as_bytes()[3]` error: called `.bytes().nth()` on a `str` --> $DIR/bytes_nth.rs:10:13 | LL | let _ = s[..].bytes().nth(3); - | ^^^^^^^^^^^^^^^^^^^^ help: try: `s[..].as_bytes().get(3)` + | ^^^^^^^^^^^^^^^^^^^^ help: try: `s[..].as_bytes().get(3).copied()` error: aborting due to 3 previous errors diff --git a/src/tools/clippy/tests/ui/cast.rs b/src/tools/clippy/tests/ui/cast.rs index e6031e9ad..8b2673c2a 100644 --- a/src/tools/clippy/tests/ui/cast.rs +++ b/src/tools/clippy/tests/ui/cast.rs @@ -28,6 +28,7 @@ fn main() { 1i32 as u8; 1f64 as isize; 1f64 as usize; + 1f32 as u32 as u16; // Test clippy::cast_possible_wrap 1u8 as i8; 1u16 as i16; diff --git a/src/tools/clippy/tests/ui/cast.stderr b/src/tools/clippy/tests/ui/cast.stderr index 0c63b4af3..451078de2 100644 --- a/src/tools/clippy/tests/ui/cast.stderr +++ b/src/tools/clippy/tests/ui/cast.stderr @@ -42,13 +42,24 @@ error: casting `f32` to `i32` may truncate the value LL | 1f32 as i32; | ^^^^^^^^^^^ | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... = note: `-D clippy::cast-possible-truncation` implied by `-D warnings` +help: ... or use `try_from` and handle the error accordingly + | +LL | i32::try_from(1f32); + | ~~~~~~~~~~~~~~~~~~~ error: casting `f32` to `u32` may truncate the value --> $DIR/cast.rs:25:5 | LL | 1f32 as u32; | ^^^^^^^^^^^ + | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... +help: ... or use `try_from` and handle the error accordingly + | +LL | u32::try_from(1f32); + | ~~~~~~~~~~~~~~~~~~~ error: casting `f32` to `u32` may lose the sign of the value --> $DIR/cast.rs:25:5 @@ -63,30 +74,60 @@ error: casting `f64` to `f32` may truncate the value | LL | 1f64 as f32; | ^^^^^^^^^^^ + | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... +help: ... or use `try_from` and handle the error accordingly + | +LL | f32::try_from(1f64); + | ~~~~~~~~~~~~~~~~~~~ error: casting `i32` to `i8` may truncate the value --> $DIR/cast.rs:27:5 | LL | 1i32 as i8; | ^^^^^^^^^^ + | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... +help: ... or use `try_from` and handle the error accordingly + | +LL | i8::try_from(1i32); + | ~~~~~~~~~~~~~~~~~~ error: casting `i32` to `u8` may truncate the value --> $DIR/cast.rs:28:5 | LL | 1i32 as u8; | ^^^^^^^^^^ + | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... +help: ... or use `try_from` and handle the error accordingly + | +LL | u8::try_from(1i32); + | ~~~~~~~~~~~~~~~~~~ error: casting `f64` to `isize` may truncate the value --> $DIR/cast.rs:29:5 | LL | 1f64 as isize; | ^^^^^^^^^^^^^ + | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... +help: ... or use `try_from` and handle the error accordingly + | +LL | isize::try_from(1f64); + | ~~~~~~~~~~~~~~~~~~~~~ error: casting `f64` to `usize` may truncate the value --> $DIR/cast.rs:30:5 | LL | 1f64 as usize; | ^^^^^^^^^^^^^ + | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... +help: ... or use `try_from` and handle the error accordingly + | +LL | usize::try_from(1f64); + | ~~~~~~~~~~~~~~~~~~~~~ error: casting `f64` to `usize` may lose the sign of the value --> $DIR/cast.rs:30:5 @@ -94,8 +135,38 @@ error: casting `f64` to `usize` may lose the sign of the value LL | 1f64 as usize; | ^^^^^^^^^^^^^ +error: casting `u32` to `u16` may truncate the value + --> $DIR/cast.rs:31:5 + | +LL | 1f32 as u32 as u16; + | ^^^^^^^^^^^^^^^^^^ + | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... +help: ... or use `try_from` and handle the error accordingly + | +LL | u16::try_from(1f32 as u32); + | ~~~~~~~~~~~~~~~~~~~~~~~~~~ + +error: casting `f32` to `u32` may truncate the value + --> $DIR/cast.rs:31:5 + | +LL | 1f32 as u32 as u16; + | ^^^^^^^^^^^ + | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... +help: ... or use `try_from` and handle the error accordingly + | +LL | u32::try_from(1f32) as u16; + | ~~~~~~~~~~~~~~~~~~~ + +error: casting `f32` to `u32` may lose the sign of the value + --> $DIR/cast.rs:31:5 + | +LL | 1f32 as u32 as u16; + | ^^^^^^^^^^^ + error: casting `u8` to `i8` may wrap around the value - --> $DIR/cast.rs:32:5 + --> $DIR/cast.rs:33:5 | LL | 1u8 as i8; | ^^^^^^^^^ @@ -103,61 +174,79 @@ LL | 1u8 as i8; = note: `-D clippy::cast-possible-wrap` implied by `-D warnings` error: casting `u16` to `i16` may wrap around the value - --> $DIR/cast.rs:33:5 + --> $DIR/cast.rs:34:5 | LL | 1u16 as i16; | ^^^^^^^^^^^ error: casting `u32` to `i32` may wrap around the value - --> $DIR/cast.rs:34:5 + --> $DIR/cast.rs:35:5 | LL | 1u32 as i32; | ^^^^^^^^^^^ error: casting `u64` to `i64` may wrap around the value - --> $DIR/cast.rs:35:5 + --> $DIR/cast.rs:36:5 | LL | 1u64 as i64; | ^^^^^^^^^^^ error: casting `usize` to `isize` may wrap around the value - --> $DIR/cast.rs:36:5 + --> $DIR/cast.rs:37:5 | LL | 1usize as isize; | ^^^^^^^^^^^^^^^ error: casting `i32` to `u32` may lose the sign of the value - --> $DIR/cast.rs:39:5 + --> $DIR/cast.rs:40:5 | LL | -1i32 as u32; | ^^^^^^^^^^^^ error: casting `isize` to `usize` may lose the sign of the value - --> $DIR/cast.rs:41:5 + --> $DIR/cast.rs:42:5 | LL | -1isize as usize; | ^^^^^^^^^^^^^^^^ error: casting `i64` to `i8` may truncate the value - --> $DIR/cast.rs:108:5 + --> $DIR/cast.rs:109:5 | LL | (-99999999999i64).min(1) as i8; // should be linted because signed | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... +help: ... or use `try_from` and handle the error accordingly + | +LL | i8::try_from((-99999999999i64).min(1)); // should be linted because signed + | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ error: casting `u64` to `u8` may truncate the value - --> $DIR/cast.rs:120:5 + --> $DIR/cast.rs:121:5 | LL | 999999u64.clamp(0, 256) as u8; // should still be linted | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... +help: ... or use `try_from` and handle the error accordingly + | +LL | u8::try_from(999999u64.clamp(0, 256)); // should still be linted + | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ error: casting `main::E2` to `u8` may truncate the value - --> $DIR/cast.rs:141:21 + --> $DIR/cast.rs:142:21 | LL | let _ = self as u8; | ^^^^^^^^^^ + | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... +help: ... or use `try_from` and handle the error accordingly + | +LL | let _ = u8::try_from(self); + | ~~~~~~~~~~~~~~~~~~ error: casting `main::E2::B` to `u8` will truncate the value - --> $DIR/cast.rs:142:21 + --> $DIR/cast.rs:143:21 | LL | let _ = Self::B as u8; | ^^^^^^^^^^^^^ @@ -165,46 +254,82 @@ LL | let _ = Self::B as u8; = note: `-D clippy::cast-enum-truncation` implied by `-D warnings` error: casting `main::E5` to `i8` may truncate the value - --> $DIR/cast.rs:178:21 + --> $DIR/cast.rs:179:21 | LL | let _ = self as i8; | ^^^^^^^^^^ + | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... +help: ... or use `try_from` and handle the error accordingly + | +LL | let _ = i8::try_from(self); + | ~~~~~~~~~~~~~~~~~~ error: casting `main::E5::A` to `i8` will truncate the value - --> $DIR/cast.rs:179:21 + --> $DIR/cast.rs:180:21 | LL | let _ = Self::A as i8; | ^^^^^^^^^^^^^ error: casting `main::E6` to `i16` may truncate the value - --> $DIR/cast.rs:193:21 + --> $DIR/cast.rs:194:21 | LL | let _ = self as i16; | ^^^^^^^^^^^ + | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... +help: ... or use `try_from` and handle the error accordingly + | +LL | let _ = i16::try_from(self); + | ~~~~~~~~~~~~~~~~~~~ error: casting `main::E7` to `usize` may truncate the value on targets with 32-bit wide pointers - --> $DIR/cast.rs:208:21 + --> $DIR/cast.rs:209:21 | LL | let _ = self as usize; | ^^^^^^^^^^^^^ + | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... +help: ... or use `try_from` and handle the error accordingly + | +LL | let _ = usize::try_from(self); + | ~~~~~~~~~~~~~~~~~~~~~ error: casting `main::E10` to `u16` may truncate the value - --> $DIR/cast.rs:249:21 + --> $DIR/cast.rs:250:21 | LL | let _ = self as u16; | ^^^^^^^^^^^ + | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... +help: ... or use `try_from` and handle the error accordingly + | +LL | let _ = u16::try_from(self); + | ~~~~~~~~~~~~~~~~~~~ error: casting `u32` to `u8` may truncate the value - --> $DIR/cast.rs:257:13 + --> $DIR/cast.rs:258:13 | LL | let c = (q >> 16) as u8; | ^^^^^^^^^^^^^^^ + | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... +help: ... or use `try_from` and handle the error accordingly + | +LL | let c = u8::try_from((q >> 16)); + | ~~~~~~~~~~~~~~~~~~~~~~~ error: casting `u32` to `u8` may truncate the value - --> $DIR/cast.rs:260:13 + --> $DIR/cast.rs:261:13 | LL | let c = (q / 1000) as u8; | ^^^^^^^^^^^^^^^^ + | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... +help: ... or use `try_from` and handle the error accordingly + | +LL | let c = u8::try_from((q / 1000)); + | ~~~~~~~~~~~~~~~~~~~~~~~~ -error: aborting due to 33 previous errors +error: aborting due to 36 previous errors diff --git a/src/tools/clippy/tests/ui/cast_size.stderr b/src/tools/clippy/tests/ui/cast_size.stderr index 95552f2e2..6d2d49d9e 100644 --- a/src/tools/clippy/tests/ui/cast_size.stderr +++ b/src/tools/clippy/tests/ui/cast_size.stderr @@ -4,7 +4,12 @@ error: casting `isize` to `i8` may truncate the value LL | 1isize as i8; | ^^^^^^^^^^^^ | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... = note: `-D clippy::cast-possible-truncation` implied by `-D warnings` +help: ... or use `try_from` and handle the error accordingly + | +LL | i8::try_from(1isize); + | ~~~~~~~~~~~~~~~~~~~~ error: casting `isize` to `f64` causes a loss of precision on targets with 64-bit wide pointers (`isize` is 64 bits wide, but `f64`'s mantissa is only 52 bits wide) --> $DIR/cast_size.rs:15:5 @@ -37,24 +42,48 @@ error: casting `isize` to `i32` may truncate the value on targets with 64-bit wi | LL | 1isize as i32; | ^^^^^^^^^^^^^ + | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... +help: ... or use `try_from` and handle the error accordingly + | +LL | i32::try_from(1isize); + | ~~~~~~~~~~~~~~~~~~~~~ error: casting `isize` to `u32` may truncate the value on targets with 64-bit wide pointers --> $DIR/cast_size.rs:20:5 | LL | 1isize as u32; | ^^^^^^^^^^^^^ + | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... +help: ... or use `try_from` and handle the error accordingly + | +LL | u32::try_from(1isize); + | ~~~~~~~~~~~~~~~~~~~~~ error: casting `usize` to `u32` may truncate the value on targets with 64-bit wide pointers --> $DIR/cast_size.rs:21:5 | LL | 1usize as u32; | ^^^^^^^^^^^^^ + | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... +help: ... or use `try_from` and handle the error accordingly + | +LL | u32::try_from(1usize); + | ~~~~~~~~~~~~~~~~~~~~~ error: casting `usize` to `i32` may truncate the value on targets with 64-bit wide pointers --> $DIR/cast_size.rs:22:5 | LL | 1usize as i32; | ^^^^^^^^^^^^^ + | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... +help: ... or use `try_from` and handle the error accordingly + | +LL | i32::try_from(1usize); + | ~~~~~~~~~~~~~~~~~~~~~ error: casting `usize` to `i32` may wrap around the value on targets with 32-bit wide pointers --> $DIR/cast_size.rs:22:5 @@ -69,18 +98,36 @@ error: casting `i64` to `isize` may truncate the value on targets with 32-bit wi | LL | 1i64 as isize; | ^^^^^^^^^^^^^ + | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... +help: ... or use `try_from` and handle the error accordingly + | +LL | isize::try_from(1i64); + | ~~~~~~~~~~~~~~~~~~~~~ error: casting `i64` to `usize` may truncate the value on targets with 32-bit wide pointers --> $DIR/cast_size.rs:25:5 | LL | 1i64 as usize; | ^^^^^^^^^^^^^ + | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... +help: ... or use `try_from` and handle the error accordingly + | +LL | usize::try_from(1i64); + | ~~~~~~~~~~~~~~~~~~~~~ error: casting `u64` to `isize` may truncate the value on targets with 32-bit wide pointers --> $DIR/cast_size.rs:26:5 | LL | 1u64 as isize; | ^^^^^^^^^^^^^ + | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... +help: ... or use `try_from` and handle the error accordingly + | +LL | isize::try_from(1u64); + | ~~~~~~~~~~~~~~~~~~~~~ error: casting `u64` to `isize` may wrap around the value on targets with 64-bit wide pointers --> $DIR/cast_size.rs:26:5 @@ -93,6 +140,12 @@ error: casting `u64` to `usize` may truncate the value on targets with 32-bit wi | LL | 1u64 as usize; | ^^^^^^^^^^^^^ + | + = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ... +help: ... or use `try_from` and handle the error accordingly + | +LL | usize::try_from(1u64); + | ~~~~~~~~~~~~~~~~~~~~~ error: casting `u32` to `isize` may wrap around the value on targets with 32-bit wide pointers --> $DIR/cast_size.rs:28:5 diff --git a/src/tools/clippy/tests/ui/crashes/ice-2774.stderr b/src/tools/clippy/tests/ui/crashes/ice-2774.stderr index 1f26c7f4d..c5ea0b16d 100644 --- a/src/tools/clippy/tests/ui/crashes/ice-2774.stderr +++ b/src/tools/clippy/tests/ui/crashes/ice-2774.stderr @@ -5,6 +5,11 @@ LL | pub fn add_barfoos_to_foos<'a>(bars: &HashSet<&'a Bar>) { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: `-D clippy::needless-lifetimes` implied by `-D warnings` +help: elide the lifetimes + | +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 diff --git a/src/tools/clippy/tests/ui/crashes/ice-rust-107877.rs b/src/tools/clippy/tests/ui/crashes/ice-rust-107877.rs new file mode 100644 index 000000000..7f5bae60d --- /dev/null +++ b/src/tools/clippy/tests/ui/crashes/ice-rust-107877.rs @@ -0,0 +1,17 @@ +#![allow(dead_code)] + +struct Foo; + +impl<'a> std::convert::TryFrom<&'a String> for Foo { + type Error = std::convert::Infallible; + + fn try_from(_: &'a String) -> Result<Self, Self::Error> { + Ok(Foo) + } +} + +fn find<E>(_: impl std::convert::TryInto<Foo, Error = E>) {} + +fn main() { + find(&String::new()); +} 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 875d5ab4f..0b0e0ad26 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 @@ -9,6 +9,11 @@ note: the lint level is defined here | LL | #![deny(clippy::needless_lifetimes)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ +help: elide the lifetimes + | +LL - fn baz<'a>(&'a self) -> impl Foo + 'a { +LL + fn baz(&self) -> impl Foo + '_ { + | error: aborting due to previous error diff --git a/src/tools/clippy/tests/ui/crashes/needless_pass_by_value-w-late-bound.rs b/src/tools/clippy/tests/ui/crashes/needless_pass_by_value-w-late-bound.rs new file mode 100644 index 000000000..dd3d8b8b6 --- /dev/null +++ b/src/tools/clippy/tests/ui/crashes/needless_pass_by_value-w-late-bound.rs @@ -0,0 +1,9 @@ +// https://github.com/rust-lang/rust/issues/107147 + +#![warn(clippy::needless_pass_by_value)] + +struct Foo<'a>(&'a [(); 100]); + +fn test(x: Foo<'_>) {} + +fn main() {} 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 new file mode 100644 index 000000000..7a0a64897 --- /dev/null +++ b/src/tools/clippy/tests/ui/crashes/needless_pass_by_value-w-late-bound.stderr @@ -0,0 +1,15 @@ +error: this argument is passed by value, but not consumed in the function body + --> $DIR/needless_pass_by_value-w-late-bound.rs:7:12 + | +LL | fn test(x: Foo<'_>) {} + | ^^^^^^^ help: consider taking a reference instead: `&Foo<'_>` + | +help: consider marking this type as `Copy` + --> $DIR/needless_pass_by_value-w-late-bound.rs:5:1 + | +LL | struct Foo<'a>(&'a [(); 100]); + | ^^^^^^^^^^^^^^ + = note: `-D clippy::needless-pass-by-value` implied by `-D warnings` + +error: aborting due to 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 747801b40..ecb0bf364 100644 --- a/src/tools/clippy/tests/ui/doc/doc-fixable.fixed +++ b/src/tools/clippy/tests/ui/doc/doc-fixable.fixed @@ -78,7 +78,7 @@ fn test_allowed() { /// This test has [a `link_with_underscores`][chunked-example] inside it. See #823. /// See also [the issue tracker](https://github.com/rust-lang/rust-clippy/search?q=clippy::doc_markdown&type=Issues) /// on GitHub (which is a camel-cased word, but is OK). And here is another [inline link][inline_link]. -/// It can also be [`inline_link2`]. +/// It can also be [inline_link2]. A link to [StackOverflow](https://stackoverflow.com) is also acceptable. /// /// [chunked-example]: https://en.wikipedia.org/wiki/Chunked_transfer_encoding#Example /// [inline_link]: https://foobar diff --git a/src/tools/clippy/tests/ui/doc/doc-fixable.rs b/src/tools/clippy/tests/ui/doc/doc-fixable.rs index f3cf96615..11c48dd10 100644 --- a/src/tools/clippy/tests/ui/doc/doc-fixable.rs +++ b/src/tools/clippy/tests/ui/doc/doc-fixable.rs @@ -75,10 +75,10 @@ fn test_units() { fn test_allowed() { } -/// This test has [a link_with_underscores][chunked-example] inside it. See #823. +/// This test has [a `link_with_underscores`][chunked-example] inside it. See #823. /// See also [the issue tracker](https://github.com/rust-lang/rust-clippy/search?q=clippy::doc_markdown&type=Issues) /// on GitHub (which is a camel-cased word, but is OK). And here is another [inline link][inline_link]. -/// It can also be [inline_link2]. +/// It can also be [inline_link2]. A link to [StackOverflow](https://stackoverflow.com) is also acceptable. /// /// [chunked-example]: https://en.wikipedia.org/wiki/Chunked_transfer_encoding#Example /// [inline_link]: https://foobar diff --git a/src/tools/clippy/tests/ui/doc/doc-fixable.stderr b/src/tools/clippy/tests/ui/doc/doc-fixable.stderr index 40345370c..6c67c903c 100644 --- a/src/tools/clippy/tests/ui/doc/doc-fixable.stderr +++ b/src/tools/clippy/tests/ui/doc/doc-fixable.stderr @@ -143,28 +143,6 @@ LL | /// `be_sure_we_got_to_the_end_of_it` | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ error: item in documentation is missing backticks - --> $DIR/doc-fixable.rs:78:22 - | -LL | /// This test has [a link_with_underscores][chunked-example] inside it. See #823. - | ^^^^^^^^^^^^^^^^^^^^^ - | -help: try - | -LL | /// This test has [a `link_with_underscores`][chunked-example] inside it. See #823. - | ~~~~~~~~~~~~~~~~~~~~~~~ - -error: item in documentation is missing backticks - --> $DIR/doc-fixable.rs:81:21 - | -LL | /// It can also be [inline_link2]. - | ^^^^^^^^^^^^ - | -help: try - | -LL | /// It can also be [`inline_link2`]. - | ~~~~~~~~~~~~~~ - -error: item in documentation is missing backticks --> $DIR/doc-fixable.rs:91:5 | LL | /// be_sure_we_got_to_the_end_of_it @@ -329,5 +307,5 @@ help: try LL | /// An iterator over `mycrate::Collection`'s values. | ~~~~~~~~~~~~~~~~~~~~~ -error: aborting due to 30 previous errors +error: aborting due to 28 previous errors diff --git a/src/tools/clippy/tests/ui/entry.fixed b/src/tools/clippy/tests/ui/entry.fixed index 79c29c04e..dbe09e0ff 100644 --- a/src/tools/clippy/tests/ui/entry.fixed +++ b/src/tools/clippy/tests/ui/entry.fixed @@ -152,4 +152,18 @@ fn hash_map<K: Eq + Hash + Copy, V: Copy>(m: &mut HashMap<K, V>, m2: &mut HashMa }); } +// Issue 10331 +// do not suggest a bad expansion because the compiler unrolls the first +// occurrence of the loop +pub fn issue_10331() { + let mut m = HashMap::new(); + let mut i = 0; + let mut x = 0; + while !m.contains_key(&x) { + m.insert(x, i); + i += 1; + x += 1; + } +} + fn main() {} diff --git a/src/tools/clippy/tests/ui/entry.rs b/src/tools/clippy/tests/ui/entry.rs index 2d7985457..30fed34fc 100644 --- a/src/tools/clippy/tests/ui/entry.rs +++ b/src/tools/clippy/tests/ui/entry.rs @@ -156,4 +156,18 @@ fn hash_map<K: Eq + Hash + Copy, V: Copy>(m: &mut HashMap<K, V>, m2: &mut HashMa } } +// Issue 10331 +// do not suggest a bad expansion because the compiler unrolls the first +// occurrence of the loop +pub fn issue_10331() { + let mut m = HashMap::new(); + let mut i = 0; + let mut x = 0; + while !m.contains_key(&x) { + m.insert(x, i); + i += 1; + x += 1; + } +} + fn main() {} diff --git a/src/tools/clippy/tests/ui/explicit_auto_deref.fixed b/src/tools/clippy/tests/ui/explicit_auto_deref.fixed index 475fae5e8..5d40c8504 100644 --- a/src/tools/clippy/tests/ui/explicit_auto_deref.fixed +++ b/src/tools/clippy/tests/ui/explicit_auto_deref.fixed @@ -269,6 +269,9 @@ fn main() { trait WithAssoc { type Assoc: ?Sized; + fn to_assoc(&self) -> &Self::Assoc { + panic!() + } } impl WithAssoc for String { type Assoc = str; @@ -281,4 +284,15 @@ fn main() { // Issue #9901 fn takes_ref(_: &i32) {} takes_ref(*Box::new(&0i32)); + + // Issue #10384 + impl<'a> WithAssoc for &'a u32 { + type Assoc = dyn core::fmt::Display; + fn to_assoc(&self) -> &Self::Assoc { + *self + } + } + fn return_dyn_assoc<'a>(x: &'a &'a u32) -> &'a <&'a u32 as WithAssoc>::Assoc { + *x + } } diff --git a/src/tools/clippy/tests/ui/explicit_auto_deref.rs b/src/tools/clippy/tests/ui/explicit_auto_deref.rs index c1894258f..79e03f4d7 100644 --- a/src/tools/clippy/tests/ui/explicit_auto_deref.rs +++ b/src/tools/clippy/tests/ui/explicit_auto_deref.rs @@ -269,6 +269,9 @@ fn main() { trait WithAssoc { type Assoc: ?Sized; + fn to_assoc(&self) -> &Self::Assoc { + panic!() + } } impl WithAssoc for String { type Assoc = str; @@ -281,4 +284,15 @@ fn main() { // Issue #9901 fn takes_ref(_: &i32) {} takes_ref(*Box::new(&0i32)); + + // Issue #10384 + impl<'a> WithAssoc for &'a u32 { + type Assoc = dyn core::fmt::Display; + fn to_assoc(&self) -> &Self::Assoc { + *self + } + } + fn return_dyn_assoc<'a>(x: &'a &'a u32) -> &'a <&'a u32 as WithAssoc>::Assoc { + *x + } } diff --git a/src/tools/clippy/tests/ui/extra_unused_type_parameters.rs b/src/tools/clippy/tests/ui/extra_unused_type_parameters.rs new file mode 100644 index 000000000..480174342 --- /dev/null +++ b/src/tools/clippy/tests/ui/extra_unused_type_parameters.rs @@ -0,0 +1,110 @@ +#![allow(unused, clippy::needless_lifetimes)] +#![warn(clippy::extra_unused_type_parameters)] + +fn unused_ty<T>(x: u8) { + unimplemented!() +} + +fn unused_multi<T, U>(x: u8) { + unimplemented!() +} + +fn unused_with_lt<'a, T>(x: &'a u8) { + unimplemented!() +} + +fn used_ty<T>(x: T, y: u8) {} + +fn used_ref<'a, T>(x: &'a T) {} + +fn used_ret<T: Default>(x: u8) -> T { + T::default() +} + +fn unused_bounded<T: Default, U>(x: U) { + unimplemented!(); +} + +fn unused_where_clause<T, U>(x: U) +where + T: Default, +{ + unimplemented!(); +} + +fn some_unused<A, B, C, D: Iterator<Item = (B, C)>, E>(b: B, c: C) { + unimplemented!(); +} + +fn used_opaque<A>(iter: impl Iterator<Item = A>) -> usize { + iter.count() +} + +fn used_ret_opaque<A>() -> impl Iterator<Item = A> { + std::iter::empty() +} + +fn used_vec_box<T>(x: Vec<Box<T>>) {} + +fn used_body<T: Default + ToString>() -> String { + T::default().to_string() +} + +fn used_closure<T: Default + ToString>() -> impl Fn() { + || println!("{}", T::default().to_string()) +} + +struct S; + +impl S { + fn unused_ty_impl<T>(&self) { + unimplemented!() + } +} + +// Don't lint on trait methods +trait Foo { + fn bar<T>(&self); +} + +impl Foo for S { + fn bar<T>(&self) {} +} + +fn skip_index<A, Iter>(iter: Iter, index: usize) -> impl Iterator<Item = A> +where + Iter: Iterator<Item = A>, +{ + iter.enumerate() + .filter_map(move |(i, a)| if i == index { None } else { Some(a) }) +} + +fn unused_opaque<A, B>(dummy: impl Default) { + unimplemented!() +} + +mod unexported_trait_bounds { + mod private { + pub trait Private {} + } + + fn priv_trait_bound<T: private::Private>() { + unimplemented!(); + } + + fn unused_with_priv_trait_bound<T: private::Private, U>() { + unimplemented!(); + } +} + +mod issue10319 { + fn assert_send<T: Send>() {} + + fn assert_send_where<T>() + where + T: Send, + { + } +} + +fn main() {} diff --git a/src/tools/clippy/tests/ui/extra_unused_type_parameters.stderr b/src/tools/clippy/tests/ui/extra_unused_type_parameters.stderr new file mode 100644 index 000000000..86c88fc9b --- /dev/null +++ b/src/tools/clippy/tests/ui/extra_unused_type_parameters.stderr @@ -0,0 +1,75 @@ +error: type parameter goes unused in function definition + --> $DIR/extra_unused_type_parameters.rs:4:13 + | +LL | fn unused_ty<T>(x: u8) { + | ^^^ + | + = help: consider removing the parameter + = note: `-D clippy::extra-unused-type-parameters` implied by `-D warnings` + +error: type parameters go unused in function definition + --> $DIR/extra_unused_type_parameters.rs:8:16 + | +LL | fn unused_multi<T, U>(x: u8) { + | ^^^^^^ + | + = help: consider removing the parameters + +error: type parameter goes unused in function definition + --> $DIR/extra_unused_type_parameters.rs:12:23 + | +LL | fn unused_with_lt<'a, T>(x: &'a u8) { + | ^ + | + = help: consider removing the parameter + +error: type parameter goes unused in function definition + --> $DIR/extra_unused_type_parameters.rs:24:19 + | +LL | fn unused_bounded<T: Default, U>(x: U) { + | ^^^^^^^^^^^ + | + = help: consider removing the parameter + +error: type parameter goes unused in function definition + --> $DIR/extra_unused_type_parameters.rs:28:24 + | +LL | fn unused_where_clause<T, U>(x: U) + | ^^ + | + = help: consider removing the parameter + +error: type parameters go unused in function definition + --> $DIR/extra_unused_type_parameters.rs:35:16 + | +LL | fn some_unused<A, B, C, D: Iterator<Item = (B, C)>, E>(b: B, c: C) { + | ^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^ + | + = help: consider removing the parameters + +error: type parameter goes unused in function definition + --> $DIR/extra_unused_type_parameters.rs:60:22 + | +LL | fn unused_ty_impl<T>(&self) { + | ^^^ + | + = help: consider removing the parameter + +error: type parameters go unused in function definition + --> $DIR/extra_unused_type_parameters.rs:82:17 + | +LL | fn unused_opaque<A, B>(dummy: impl Default) { + | ^^^^^^ + | + = help: consider removing the parameters + +error: type parameter goes unused in function definition + --> $DIR/extra_unused_type_parameters.rs:95:58 + | +LL | fn unused_with_priv_trait_bound<T: private::Private, U>() { + | ^ + | + = help: consider removing the parameter + +error: aborting due to 9 previous errors + diff --git a/src/tools/clippy/tests/ui/format.fixed b/src/tools/clippy/tests/ui/format.fixed index beedf2c1d..cd2f70ee8 100644 --- a/src/tools/clippy/tests/ui/format.fixed +++ b/src/tools/clippy/tests/ui/format.fixed @@ -1,4 +1,5 @@ // run-rustfix +// aux-build: proc_macro_with_span.rs #![warn(clippy::useless_format)] #![allow( unused_tuple_struct_fields, @@ -9,6 +10,8 @@ clippy::uninlined_format_args )] +extern crate proc_macro_with_span; + struct Foo(pub String); macro_rules! foo { @@ -87,4 +90,7 @@ fn main() { let _ = abc.to_string(); let xx = "xx"; let _ = xx.to_string(); + + // Issue #10148 + println!(proc_macro_with_span::with_span!(""something "")); } diff --git a/src/tools/clippy/tests/ui/format.rs b/src/tools/clippy/tests/ui/format.rs index e805f1818..c22345a79 100644 --- a/src/tools/clippy/tests/ui/format.rs +++ b/src/tools/clippy/tests/ui/format.rs @@ -1,4 +1,5 @@ // run-rustfix +// aux-build: proc_macro_with_span.rs #![warn(clippy::useless_format)] #![allow( unused_tuple_struct_fields, @@ -9,6 +10,8 @@ clippy::uninlined_format_args )] +extern crate proc_macro_with_span; + struct Foo(pub String); macro_rules! foo { @@ -89,4 +92,7 @@ fn main() { let _ = format!("{abc}"); let xx = "xx"; let _ = format!("{xx}"); + + // Issue #10148 + println!(proc_macro_with_span::with_span!(""something "")); } diff --git a/src/tools/clippy/tests/ui/format.stderr b/src/tools/clippy/tests/ui/format.stderr index 0ef0ac655..a0e5d5c8a 100644 --- a/src/tools/clippy/tests/ui/format.stderr +++ b/src/tools/clippy/tests/ui/format.stderr @@ -1,5 +1,5 @@ error: useless use of `format!` - --> $DIR/format.rs:19:5 + --> $DIR/format.rs:22:5 | LL | format!("foo"); | ^^^^^^^^^^^^^^ help: consider using `.to_string()`: `"foo".to_string()` @@ -7,19 +7,19 @@ LL | format!("foo"); = note: `-D clippy::useless-format` implied by `-D warnings` error: useless use of `format!` - --> $DIR/format.rs:20:5 + --> $DIR/format.rs:23:5 | LL | format!("{{}}"); | ^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `"{}".to_string()` error: useless use of `format!` - --> $DIR/format.rs:21:5 + --> $DIR/format.rs:24:5 | LL | format!("{{}} abc {{}}"); | ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `"{} abc {}".to_string()` error: useless use of `format!` - --> $DIR/format.rs:22:5 + --> $DIR/format.rs:25:5 | LL | / format!( LL | | r##"foo {{}} @@ -34,67 +34,67 @@ LL ~ " bar"##.to_string(); | error: useless use of `format!` - --> $DIR/format.rs:27:13 + --> $DIR/format.rs:30:13 | LL | let _ = format!(""); | ^^^^^^^^^^^ help: consider using `String::new()`: `String::new()` error: useless use of `format!` - --> $DIR/format.rs:29:5 + --> $DIR/format.rs:32:5 | LL | format!("{}", "foo"); | ^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `"foo".to_string()` error: useless use of `format!` - --> $DIR/format.rs:37:5 + --> $DIR/format.rs:40:5 | LL | format!("{}", arg); | ^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `arg.to_string()` error: useless use of `format!` - --> $DIR/format.rs:67:5 + --> $DIR/format.rs:70:5 | LL | format!("{}", 42.to_string()); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `42.to_string()` error: useless use of `format!` - --> $DIR/format.rs:69:5 + --> $DIR/format.rs:72:5 | LL | format!("{}", x.display().to_string()); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `x.display().to_string()` error: useless use of `format!` - --> $DIR/format.rs:73:18 + --> $DIR/format.rs:76:18 | LL | let _ = Some(format!("{}", a + "bar")); | ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `a + "bar"` error: useless use of `format!` - --> $DIR/format.rs:77:22 + --> $DIR/format.rs:80:22 | LL | let _s: String = format!("{}", &*v.join("/n")); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `(&*v.join("/n")).to_string()` error: useless use of `format!` - --> $DIR/format.rs:83:13 + --> $DIR/format.rs:86:13 | LL | let _ = format!("{x}"); | ^^^^^^^^^^^^^^ help: consider using `.to_string()`: `x.to_string()` error: useless use of `format!` - --> $DIR/format.rs:85:13 + --> $DIR/format.rs:88:13 | LL | let _ = format!("{y}", y = x); | ^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `x.to_string()` error: useless use of `format!` - --> $DIR/format.rs:89:13 + --> $DIR/format.rs:92:13 | LL | let _ = format!("{abc}"); | ^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `abc.to_string()` error: useless use of `format!` - --> $DIR/format.rs:91:13 + --> $DIR/format.rs:94:13 | LL | let _ = format!("{xx}"); | ^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `xx.to_string()` diff --git a/src/tools/clippy/tests/ui/impl_trait_in_params.rs b/src/tools/clippy/tests/ui/impl_trait_in_params.rs new file mode 100644 index 000000000..07560101a --- /dev/null +++ b/src/tools/clippy/tests/ui/impl_trait_in_params.rs @@ -0,0 +1,17 @@ +#![allow(unused)] +#![warn(clippy::impl_trait_in_params)] + +pub trait Trait {} +pub trait AnotherTrait<T> {} + +// Should warn +pub fn a(_: impl Trait) {} +pub fn c<C: Trait>(_: C, _: impl Trait) {} +fn d(_: impl AnotherTrait<u32>) {} + +// Shouldn't warn + +pub fn b<B: Trait>(_: B) {} +fn e<T: AnotherTrait<u32>>(_: T) {} + +fn main() {} diff --git a/src/tools/clippy/tests/ui/impl_trait_in_params.stderr b/src/tools/clippy/tests/ui/impl_trait_in_params.stderr new file mode 100644 index 000000000..acfcc2144 --- /dev/null +++ b/src/tools/clippy/tests/ui/impl_trait_in_params.stderr @@ -0,0 +1,25 @@ +error: '`impl Trait` used as a function parameter' + --> $DIR/impl_trait_in_params.rs:8:13 + | +LL | pub fn a(_: impl Trait) {} + | ^^^^^^^^^^ + | + = note: `-D clippy::impl-trait-in-params` implied by `-D warnings` +help: add a type paremeter + | +LL | pub fn a<{ /* Generic name */ }: Trait>(_: impl Trait) {} + | +++++++++++++++++++++++++++++++ + +error: '`impl Trait` used as a function parameter' + --> $DIR/impl_trait_in_params.rs:9:29 + | +LL | pub fn c<C: Trait>(_: C, _: impl Trait) {} + | ^^^^^^^^^^ + | +help: add a type paremeter + | +LL | pub fn c<C: Trait, { /* Generic name */ }: Trait>(_: C, _: impl Trait) {} + | +++++++++++++++++++++++++++++++ + +error: aborting due to 2 previous errors + diff --git a/src/tools/clippy/tests/ui/large_digit_groups.fixed b/src/tools/clippy/tests/ui/large_digit_groups.fixed index 3430c137e..ea18dac06 100644 --- a/src/tools/clippy/tests/ui/large_digit_groups.fixed +++ b/src/tools/clippy/tests/ui/large_digit_groups.fixed @@ -11,7 +11,7 @@ fn main() { let _good = ( 0b1011_i64, 0o1_234_u32, - 0x0123_4567, + 0x1_234_567, 1_2345_6789, 1234_f32, 1_234.12_f32, @@ -19,7 +19,7 @@ fn main() { 1.123_4_f32, ); let _bad = ( - 0b11_0110_i64, + 0b1_10110_i64, 0xdead_beef_usize, 123_456_f32, 123_456.12_f32, diff --git a/src/tools/clippy/tests/ui/large_digit_groups.stderr b/src/tools/clippy/tests/ui/large_digit_groups.stderr index 13d108b56..19c0fae98 100644 --- a/src/tools/clippy/tests/ui/large_digit_groups.stderr +++ b/src/tools/clippy/tests/ui/large_digit_groups.stderr @@ -1,22 +1,10 @@ -error: digits of hex or binary literal not grouped by four - --> $DIR/large_digit_groups.rs:14:9 - | -LL | 0x1_234_567, - | ^^^^^^^^^^^ help: consider: `0x0123_4567` - | - = note: `-D clippy::unusual-byte-groupings` implied by `-D warnings` - -error: digits of hex or binary literal not grouped by four - --> $DIR/large_digit_groups.rs:22:9 - | -LL | 0b1_10110_i64, - | ^^^^^^^^^^^^^ help: consider: `0b11_0110_i64` - -error: digits of hex or binary literal not grouped by four +error: digits of hex, binary or octal literal not in groups of equal size --> $DIR/large_digit_groups.rs:23:9 | LL | 0xd_e_adbee_f_usize, | ^^^^^^^^^^^^^^^^^^^ help: consider: `0xdead_beef_usize` + | + = note: `-D clippy::unusual-byte-groupings` implied by `-D warnings` error: digit groups should be smaller --> $DIR/large_digit_groups.rs:24:9 @@ -44,5 +32,5 @@ error: digit groups should be smaller LL | 1_23456.12345_6_f64, | ^^^^^^^^^^^^^^^^^^^ help: consider: `123_456.123_456_f64` -error: aborting due to 7 previous errors +error: aborting due to 5 previous errors diff --git a/src/tools/clippy/tests/ui/len_without_is_empty.rs b/src/tools/clippy/tests/ui/len_without_is_empty.rs index 78397c2af..b5dec6c46 100644 --- a/src/tools/clippy/tests/ui/len_without_is_empty.rs +++ b/src/tools/clippy/tests/ui/len_without_is_empty.rs @@ -282,4 +282,50 @@ impl AsyncLen { } } +// issue #9520 +pub struct NonStandardLenAndIsEmptySignature; +impl NonStandardLenAndIsEmptySignature { + // don't lint + pub fn len(&self, something: usize) -> usize { + something + } + + pub fn is_empty(&self, something: usize) -> bool { + something == 0 + } +} + +// test case for #9520 with generics in the function signature +pub trait TestResource { + type NonStandardSignatureWithGenerics: Copy; + fn lookup_content(&self, item: Self::NonStandardSignatureWithGenerics) -> Result<Option<&[u8]>, String>; +} +pub struct NonStandardSignatureWithGenerics(u32); +impl NonStandardSignatureWithGenerics { + pub fn is_empty<T, U>(self, resource: &T) -> bool + where + T: TestResource<NonStandardSignatureWithGenerics = U>, + U: Copy + From<NonStandardSignatureWithGenerics>, + { + if let Ok(Some(content)) = resource.lookup_content(self.into()) { + content.is_empty() + } else { + true + } + } + + // test case for #9520 with generics in the function signature + pub fn len<T, U>(self, resource: &T) -> usize + where + T: TestResource<NonStandardSignatureWithGenerics = U>, + U: Copy + From<NonStandardSignatureWithGenerics>, + { + if let Ok(Some(content)) = resource.lookup_content(self.into()) { + content.len() + } else { + 0_usize + } + } +} + fn main() {} diff --git a/src/tools/clippy/tests/ui/let_underscore_untyped.rs b/src/tools/clippy/tests/ui/let_underscore_untyped.rs new file mode 100644 index 000000000..bcb33c5c7 --- /dev/null +++ b/src/tools/clippy/tests/ui/let_underscore_untyped.rs @@ -0,0 +1,54 @@ +#![allow(unused)] +#![warn(clippy::let_underscore_untyped)] + +use std::future::Future; +use std::{boxed::Box, fmt::Display}; + +fn a() -> u32 { + 1 +} + +fn b<T>(x: T) -> T { + x +} + +fn c() -> impl Display { + 1 +} + +fn d(x: &u32) -> &u32 { + x +} + +fn e() -> Result<u32, ()> { + Ok(1) +} + +fn f() -> Box<dyn Display> { + Box::new(1) +} + +fn main() { + let _ = a(); + let _ = b(1); + let _ = c(); + let _ = d(&1); + let _ = e(); + let _ = f(); + + _ = a(); + _ = b(1); + _ = c(); + _ = d(&1); + _ = e(); + _ = f(); + + let _: u32 = a(); + let _: u32 = b(1); + let _: &u32 = d(&1); + let _: Result<_, _> = e(); + let _: Box<_> = f(); + + #[allow(clippy::let_underscore_untyped)] + let _ = a(); +} diff --git a/src/tools/clippy/tests/ui/let_underscore_untyped.stderr b/src/tools/clippy/tests/ui/let_underscore_untyped.stderr new file mode 100644 index 000000000..36c3d1214 --- /dev/null +++ b/src/tools/clippy/tests/ui/let_underscore_untyped.stderr @@ -0,0 +1,51 @@ +error: non-binding `let` without a type annotation + --> $DIR/let_underscore_untyped.rs:32:5 + | +LL | let _ = a(); + | ^^^^^^^^^^^^ + | + = help: consider adding a type annotation or removing the `let` keyword + = note: `-D clippy::let-underscore-untyped` implied by `-D warnings` + +error: non-binding `let` without a type annotation + --> $DIR/let_underscore_untyped.rs:33:5 + | +LL | let _ = b(1); + | ^^^^^^^^^^^^^ + | + = help: consider adding a type annotation or removing the `let` keyword + +error: non-binding `let` without a type annotation + --> $DIR/let_underscore_untyped.rs:34:5 + | +LL | let _ = c(); + | ^^^^^^^^^^^^ + | + = help: consider adding a type annotation or removing the `let` keyword + +error: non-binding `let` without a type annotation + --> $DIR/let_underscore_untyped.rs:35:5 + | +LL | let _ = d(&1); + | ^^^^^^^^^^^^^^ + | + = help: consider adding a type annotation or removing the `let` keyword + +error: non-binding `let` without a type annotation + --> $DIR/let_underscore_untyped.rs:36:5 + | +LL | let _ = e(); + | ^^^^^^^^^^^^ + | + = help: consider adding a type annotation or removing the `let` keyword + +error: non-binding `let` without a type annotation + --> $DIR/let_underscore_untyped.rs:37:5 + | +LL | let _ = f(); + | ^^^^^^^^^^^^ + | + = help: consider adding a type annotation or removing the `let` keyword + +error: aborting due to 6 previous errors + diff --git a/src/tools/clippy/tests/ui/literals.stderr b/src/tools/clippy/tests/ui/literals.stderr index 603d47bac..9bc7948c7 100644 --- a/src/tools/clippy/tests/ui/literals.stderr +++ b/src/tools/clippy/tests/ui/literals.stderr @@ -121,7 +121,7 @@ error: digits grouped inconsistently by underscores LL | let fail23 = 3__16___23; | ^^^^^^^^^^ help: consider: `31_623` -error: digits of hex or binary literal not grouped by four +error: digits of hex, binary or octal literal not in groups of equal size --> $DIR/literals.rs:38:18 | LL | let fail24 = 0xAB_ABC_AB; @@ -129,12 +129,6 @@ LL | let fail24 = 0xAB_ABC_AB; | = note: `-D clippy::unusual-byte-groupings` implied by `-D warnings` -error: digits of hex or binary literal not grouped by four - --> $DIR/literals.rs:39:18 - | -LL | let fail25 = 0b01_100_101; - | ^^^^^^^^^^^^ help: consider: `0b0110_0101` - error: this is a decimal constant --> $DIR/literals.rs:46:13 | @@ -168,5 +162,5 @@ help: if you mean to use a decimal constant, remove the `0` to avoid confusion LL | let _ = 89; | ~~ -error: aborting due to 21 previous errors +error: aborting due to 20 previous errors diff --git a/src/tools/clippy/tests/ui/manual_assert.edition2018.fixed b/src/tools/clippy/tests/ui/manual_assert.edition2018.fixed index 638320dd6..8c7e919bf 100644 --- a/src/tools/clippy/tests/ui/manual_assert.edition2018.fixed +++ b/src/tools/clippy/tests/ui/manual_assert.edition2018.fixed @@ -29,9 +29,7 @@ fn main() { panic!("qaqaq{:?}", a); } assert!(a.is_empty(), "qaqaq{:?}", a); - if !a.is_empty() { - panic!("qwqwq"); - } + assert!(a.is_empty(), "qwqwq"); if a.len() == 3 { println!("qwq"); println!("qwq"); @@ -46,21 +44,11 @@ fn main() { println!("qwq"); } let b = vec![1, 2, 3]; - if b.is_empty() { - panic!("panic1"); - } - if b.is_empty() && a.is_empty() { - panic!("panic2"); - } - if a.is_empty() && !b.is_empty() { - panic!("panic3"); - } - if b.is_empty() || a.is_empty() { - panic!("panic4"); - } - if a.is_empty() || !b.is_empty() { - panic!("panic5"); - } + assert!(!b.is_empty(), "panic1"); + assert!(!(b.is_empty() && a.is_empty()), "panic2"); + assert!(!(a.is_empty() && !b.is_empty()), "panic3"); + assert!(!(b.is_empty() || a.is_empty()), "panic4"); + assert!(!(a.is_empty() || !b.is_empty()), "panic5"); assert!(!a.is_empty(), "with expansion {}", one!()); if a.is_empty() { let _ = 0; @@ -71,12 +59,11 @@ fn main() { fn issue7730(a: u8) { // Suggestion should preserve comment - if a > 2 { - // comment - /* this is a + // comment +/* this is a multiline comment */ - /// Doc comment - panic!("panic with comment") // comment after `panic!` - } +/// Doc comment +// comment after `panic!` +assert!(!(a > 2), "panic with comment"); } diff --git a/src/tools/clippy/tests/ui/manual_assert.edition2018.stderr b/src/tools/clippy/tests/ui/manual_assert.edition2018.stderr index 1f2e1e308..3555ac292 100644 --- a/src/tools/clippy/tests/ui/manual_assert.edition2018.stderr +++ b/src/tools/clippy/tests/ui/manual_assert.edition2018.stderr @@ -9,6 +9,54 @@ LL | | } = note: `-D clippy::manual-assert` implied by `-D warnings` error: only a `panic!` in `if`-then statement + --> $DIR/manual_assert.rs:34:5 + | +LL | / if !a.is_empty() { +LL | | panic!("qwqwq"); +LL | | } + | |_____^ help: try instead: `assert!(a.is_empty(), "qwqwq");` + +error: only a `panic!` in `if`-then statement + --> $DIR/manual_assert.rs:51:5 + | +LL | / if b.is_empty() { +LL | | panic!("panic1"); +LL | | } + | |_____^ help: try instead: `assert!(!b.is_empty(), "panic1");` + +error: only a `panic!` in `if`-then statement + --> $DIR/manual_assert.rs:54:5 + | +LL | / if b.is_empty() && a.is_empty() { +LL | | panic!("panic2"); +LL | | } + | |_____^ help: try instead: `assert!(!(b.is_empty() && a.is_empty()), "panic2");` + +error: only a `panic!` in `if`-then statement + --> $DIR/manual_assert.rs:57:5 + | +LL | / if a.is_empty() && !b.is_empty() { +LL | | panic!("panic3"); +LL | | } + | |_____^ help: try instead: `assert!(!(a.is_empty() && !b.is_empty()), "panic3");` + +error: only a `panic!` in `if`-then statement + --> $DIR/manual_assert.rs:60:5 + | +LL | / if b.is_empty() || a.is_empty() { +LL | | panic!("panic4"); +LL | | } + | |_____^ help: try instead: `assert!(!(b.is_empty() || a.is_empty()), "panic4");` + +error: only a `panic!` in `if`-then statement + --> $DIR/manual_assert.rs:63:5 + | +LL | / if a.is_empty() || !b.is_empty() { +LL | | panic!("panic5"); +LL | | } + | |_____^ help: try instead: `assert!(!(a.is_empty() || !b.is_empty()), "panic5");` + +error: only a `panic!` in `if`-then statement --> $DIR/manual_assert.rs:66:5 | LL | / if a.is_empty() { @@ -16,5 +64,22 @@ LL | | panic!("with expansion {}", one!()) LL | | } | |_____^ help: try instead: `assert!(!a.is_empty(), "with expansion {}", one!());` -error: aborting due to 2 previous errors +error: only a `panic!` in `if`-then statement + --> $DIR/manual_assert.rs:78:5 + | +LL | / if a > 2 { +LL | | // comment +LL | | /* this is a +LL | | multiline +... | +LL | | panic!("panic with comment") // comment after `panic!` +LL | | } + | |_____^ + | +help: try instead + | +LL | assert!(!(a > 2), "panic with comment"); + | + +error: aborting due to 9 previous errors diff --git a/src/tools/clippy/tests/ui/manual_let_else.rs b/src/tools/clippy/tests/ui/manual_let_else.rs index 48a162c13..d175597a4 100644 --- a/src/tools/clippy/tests/ui/manual_let_else.rs +++ b/src/tools/clippy/tests/ui/manual_let_else.rs @@ -248,4 +248,15 @@ fn not_fire() { Some(value) => value, _ => macro_call!(), }; + + // Issue 10296 + // The let/else block in the else part is not divergent despite the presence of return + let _x = if let Some(x) = Some(1) { + x + } else { + let Some(_z) = Some(3) else { + return + }; + 1 + }; } diff --git a/src/tools/clippy/tests/ui/manual_let_else_match.rs b/src/tools/clippy/tests/ui/manual_let_else_match.rs index 28caed9d7..73b746791 100644 --- a/src/tools/clippy/tests/ui/manual_let_else_match.rs +++ b/src/tools/clippy/tests/ui/manual_let_else_match.rs @@ -42,13 +42,13 @@ fn fire() { loop { // More complex pattern for the identity arm and diverging arm let v = match h() { - (Some(_), Some(_)) | (None, None) => continue, (Some(v), None) | (None, Some(v)) => v, + (Some(_), Some(_)) | (None, None) => continue, }; // Custom enums are supported as long as the "else" arm is a simple _ let v = match build_enum() { - _ => continue, Variant::Bar(v) | Variant::Baz(v) => v, + _ => continue, }; } @@ -71,6 +71,12 @@ fn fire() { Variant::Bar(_) | Variant::Baz(_) => (), _ => return, }; + + let data = [1_u8, 2, 3, 4, 0, 0, 0, 0]; + let data = match data.as_slice() { + [data @ .., 0, 0, 0, 0] | [data @ .., 0, 0] | [data @ .., 0] => data, + _ => return, + }; } fn not_fire() { @@ -125,4 +131,23 @@ fn not_fire() { Ok(v) | Err(Variant::Bar(v) | Variant::Baz(v)) => v, Err(Variant::Foo) => return, }; + + // Issue 10241 + // The non-divergent arm arrives in second position and + // may cover values already matched in the first arm. + let v = match h() { + (Some(_), Some(_)) | (None, None) => return, + (Some(v), _) | (None, Some(v)) => v, + }; + + let v = match build_enum() { + _ => return, + Variant::Bar(v) | Variant::Baz(v) => v, + }; + + let data = [1_u8, 2, 3, 4, 0, 0, 0, 0]; + let data = match data.as_slice() { + [] | [0, 0] => return, + [data @ .., 0, 0, 0, 0] | [data @ .., 0, 0] | [data @ ..] => data, + }; } diff --git a/src/tools/clippy/tests/ui/manual_let_else_match.stderr b/src/tools/clippy/tests/ui/manual_let_else_match.stderr index cd5e9a9ac..7abaa0b85 100644 --- a/src/tools/clippy/tests/ui/manual_let_else_match.stderr +++ b/src/tools/clippy/tests/ui/manual_let_else_match.stderr @@ -22,8 +22,8 @@ error: this could be rewritten as `let...else` --> $DIR/manual_let_else_match.rs:44:9 | LL | / let v = match h() { -LL | | (Some(_), Some(_)) | (None, None) => continue, LL | | (Some(v), None) | (None, Some(v)) => v, +LL | | (Some(_), Some(_)) | (None, None) => continue, LL | | }; | |__________^ help: consider writing: `let ((Some(v), None) | (None, Some(v))) = h() else { continue };` @@ -31,8 +31,8 @@ error: this could be rewritten as `let...else` --> $DIR/manual_let_else_match.rs:49:9 | LL | / let v = match build_enum() { -LL | | _ => continue, LL | | Variant::Bar(v) | Variant::Baz(v) => v, +LL | | _ => continue, LL | | }; | |__________^ help: consider writing: `let (Variant::Bar(v) | Variant::Baz(v)) = build_enum() else { continue };` @@ -63,5 +63,14 @@ LL | | _ => return, LL | | }; | |______^ help: consider writing: `let (Variant::Bar(_) | Variant::Baz(_)) = f else { return };` -error: aborting due to 7 previous errors +error: this could be rewritten as `let...else` + --> $DIR/manual_let_else_match.rs:76:5 + | +LL | / let data = match data.as_slice() { +LL | | [data @ .., 0, 0, 0, 0] | [data @ .., 0, 0] | [data @ .., 0] => data, +LL | | _ => return, +LL | | }; + | |______^ help: consider writing: `let ([data @ .., 0, 0, 0, 0] | [data @ .., 0, 0] | [data @ .., 0]) = data.as_slice() else { return };` + +error: aborting due to 8 previous errors diff --git a/src/tools/clippy/tests/ui/map_flatten_fixable.fixed b/src/tools/clippy/tests/ui/map_flatten_fixable.fixed index 53628ef65..8e2f11389 100644 --- a/src/tools/clippy/tests/ui/map_flatten_fixable.fixed +++ b/src/tools/clippy/tests/ui/map_flatten_fixable.fixed @@ -1,6 +1,7 @@ // run-rustfix #![warn(clippy::all, clippy::pedantic)] +#![allow(clippy::let_underscore_untyped)] #![allow(clippy::missing_docs_in_private_items)] #![allow(clippy::map_identity)] #![allow(clippy::redundant_closure)] diff --git a/src/tools/clippy/tests/ui/map_flatten_fixable.rs b/src/tools/clippy/tests/ui/map_flatten_fixable.rs index 76016c8ed..a783a99c4 100644 --- a/src/tools/clippy/tests/ui/map_flatten_fixable.rs +++ b/src/tools/clippy/tests/ui/map_flatten_fixable.rs @@ -1,6 +1,7 @@ // run-rustfix #![warn(clippy::all, clippy::pedantic)] +#![allow(clippy::let_underscore_untyped)] #![allow(clippy::missing_docs_in_private_items)] #![allow(clippy::map_identity)] #![allow(clippy::redundant_closure)] diff --git a/src/tools/clippy/tests/ui/map_flatten_fixable.stderr b/src/tools/clippy/tests/ui/map_flatten_fixable.stderr index b6b0c4d09..c91f0b9ae 100644 --- a/src/tools/clippy/tests/ui/map_flatten_fixable.stderr +++ b/src/tools/clippy/tests/ui/map_flatten_fixable.stderr @@ -1,5 +1,5 @@ error: called `map(..).flatten()` on `Iterator` - --> $DIR/map_flatten_fixable.rs:17:47 + --> $DIR/map_flatten_fixable.rs:18:47 | LL | let _: Vec<_> = vec![5_i8; 6].into_iter().map(option_id).flatten().collect(); | ^^^^^^^^^^^^^^^^^^^^^^^^ help: try replacing `map` with `filter_map` and remove the `.flatten()`: `filter_map(option_id)` @@ -7,43 +7,43 @@ LL | let _: Vec<_> = vec![5_i8; 6].into_iter().map(option_id).flatten().coll = note: `-D clippy::map-flatten` implied by `-D warnings` error: called `map(..).flatten()` on `Iterator` - --> $DIR/map_flatten_fixable.rs:18:47 + --> $DIR/map_flatten_fixable.rs:19:47 | LL | let _: Vec<_> = vec![5_i8; 6].into_iter().map(option_id_ref).flatten().collect(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try replacing `map` with `filter_map` and remove the `.flatten()`: `filter_map(option_id_ref)` error: called `map(..).flatten()` on `Iterator` - --> $DIR/map_flatten_fixable.rs:19:47 + --> $DIR/map_flatten_fixable.rs:20:47 | LL | let _: Vec<_> = vec![5_i8; 6].into_iter().map(option_id_closure).flatten().collect(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try replacing `map` with `filter_map` and remove the `.flatten()`: `filter_map(option_id_closure)` error: called `map(..).flatten()` on `Iterator` - --> $DIR/map_flatten_fixable.rs:20:47 + --> $DIR/map_flatten_fixable.rs:21:47 | LL | let _: Vec<_> = vec![5_i8; 6].into_iter().map(|x| x.checked_add(1)).flatten().collect(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try replacing `map` with `filter_map` and remove the `.flatten()`: `filter_map(|x| x.checked_add(1))` error: called `map(..).flatten()` on `Iterator` - --> $DIR/map_flatten_fixable.rs:23:47 + --> $DIR/map_flatten_fixable.rs:24:47 | LL | let _: Vec<_> = vec![5_i8; 6].into_iter().map(|x| 0..x).flatten().collect(); | ^^^^^^^^^^^^^^^^^^^^^^^ help: try replacing `map` with `flat_map` and remove the `.flatten()`: `flat_map(|x| 0..x)` error: called `map(..).flatten()` on `Option` - --> $DIR/map_flatten_fixable.rs:26:40 + --> $DIR/map_flatten_fixable.rs:27:40 | LL | let _: Option<_> = (Some(Some(1))).map(|x| x).flatten(); | ^^^^^^^^^^^^^^^^^^^^ help: try replacing `map` with `and_then` and remove the `.flatten()`: `and_then(|x| x)` error: called `map(..).flatten()` on `Result` - --> $DIR/map_flatten_fixable.rs:29:42 + --> $DIR/map_flatten_fixable.rs:30:42 | LL | let _: Result<_, &str> = (Ok(Ok(1))).map(|x| x).flatten(); | ^^^^^^^^^^^^^^^^^^^^ help: try replacing `map` with `and_then` and remove the `.flatten()`: `and_then(|x| x)` error: called `map(..).flatten()` on `Iterator` - --> $DIR/map_flatten_fixable.rs:38:10 + --> $DIR/map_flatten_fixable.rs:39:10 | LL | .map(|n| match n { | __________^ @@ -72,7 +72,7 @@ LL ~ }); | error: called `map(..).flatten()` on `Option` - --> $DIR/map_flatten_fixable.rs:58:10 + --> $DIR/map_flatten_fixable.rs:59:10 | LL | .map(|_| { | __________^ diff --git a/src/tools/clippy/tests/ui/match_wildcard_for_single_variants.fixed b/src/tools/clippy/tests/ui/match_wildcard_for_single_variants.fixed index fc252cdd3..9fd3739b6 100644 --- a/src/tools/clippy/tests/ui/match_wildcard_for_single_variants.fixed +++ b/src/tools/clippy/tests/ui/match_wildcard_for_single_variants.fixed @@ -123,7 +123,7 @@ fn main() { Enum::A => (), Enum::B => (), Enum::C => (), - _ => (), + Enum::__Private => (), } match Enum::A { Enum::A => (), diff --git a/src/tools/clippy/tests/ui/match_wildcard_for_single_variants.stderr b/src/tools/clippy/tests/ui/match_wildcard_for_single_variants.stderr index 6fa313dc9..105b4c4b4 100644 --- a/src/tools/clippy/tests/ui/match_wildcard_for_single_variants.stderr +++ b/src/tools/clippy/tests/ui/match_wildcard_for_single_variants.stderr @@ -49,10 +49,16 @@ LL | _ => (), | ^ help: try this: `Color::Blue` error: wildcard matches only a single variant and will also match any future added variants + --> $DIR/match_wildcard_for_single_variants.rs:126:13 + | +LL | _ => (), + | ^ help: try this: `Enum::__Private` + +error: wildcard matches only a single variant and will also match any future added variants --> $DIR/match_wildcard_for_single_variants.rs:153:13 | LL | _ => 2, | ^ help: try this: `Foo::B` -error: aborting due to 9 previous errors +error: aborting due to 10 previous errors diff --git a/src/tools/clippy/tests/ui/methods.rs b/src/tools/clippy/tests/ui/methods.rs index 6f22366ea..1519e4da9 100644 --- a/src/tools/clippy/tests/ui/methods.rs +++ b/src/tools/clippy/tests/ui/methods.rs @@ -4,6 +4,7 @@ #![allow( clippy::disallowed_names, clippy::default_trait_access, + clippy::let_underscore_untyped, clippy::missing_docs_in_private_items, clippy::missing_safety_doc, clippy::non_ascii_literal, diff --git a/src/tools/clippy/tests/ui/methods.stderr b/src/tools/clippy/tests/ui/methods.stderr index b63672dd6..4643e09e2 100644 --- a/src/tools/clippy/tests/ui/methods.stderr +++ b/src/tools/clippy/tests/ui/methods.stderr @@ -1,5 +1,5 @@ error: methods called `new` usually return `Self` - --> $DIR/methods.rs:104:5 + --> $DIR/methods.rs:105:5 | LL | / fn new() -> i32 { LL | | 0 @@ -9,7 +9,7 @@ LL | | } = note: `-D clippy::new-ret-no-self` implied by `-D warnings` error: called `filter(..).next()` on an `Iterator`. This is more succinctly expressed by calling `.find(..)` instead - --> $DIR/methods.rs:125:13 + --> $DIR/methods.rs:126:13 | LL | let _ = v.iter().filter(|&x| { | _____________^ diff --git a/src/tools/clippy/tests/ui/missing_doc_impl.stderr b/src/tools/clippy/tests/ui/missing_doc_impl.stderr index f22fa19db..b410f56e1 100644 --- a/src/tools/clippy/tests/ui/missing_doc_impl.stderr +++ b/src/tools/clippy/tests/ui/missing_doc_impl.stderr @@ -51,13 +51,13 @@ LL | | fn foo_with_impl(&self) {} LL | | } | |_^ -error: missing documentation for an associated function +error: missing documentation for a method --> $DIR/missing_doc_impl.rs:44:5 | LL | fn foo(&self); | ^^^^^^^^^^^^^^ -error: missing documentation for an associated function +error: missing documentation for a method --> $DIR/missing_doc_impl.rs:45:5 | LL | fn foo_with_impl(&self) {} diff --git a/src/tools/clippy/tests/ui/module_name_repetitions.stderr b/src/tools/clippy/tests/ui/module_name_repetitions.stderr index 3f343a3e4..277801194 100644 --- a/src/tools/clippy/tests/ui/module_name_repetitions.stderr +++ b/src/tools/clippy/tests/ui/module_name_repetitions.stderr @@ -1,34 +1,34 @@ error: item name starts with its containing module's name - --> $DIR/module_name_repetitions.rs:8:5 + --> $DIR/module_name_repetitions.rs:8:12 | LL | pub fn foo_bar() {} - | ^^^^^^^^^^^^^^^^^^^ + | ^^^^^^^ | = note: `-D clippy::module-name-repetitions` implied by `-D warnings` error: item name ends with its containing module's name - --> $DIR/module_name_repetitions.rs:9:5 + --> $DIR/module_name_repetitions.rs:9:12 | LL | pub fn bar_foo() {} - | ^^^^^^^^^^^^^^^^^^^ + | ^^^^^^^ error: item name starts with its containing module's name - --> $DIR/module_name_repetitions.rs:10:5 + --> $DIR/module_name_repetitions.rs:10:16 | LL | pub struct FooCake; - | ^^^^^^^^^^^^^^^^^^^ + | ^^^^^^^ error: item name ends with its containing module's name - --> $DIR/module_name_repetitions.rs:11:5 + --> $DIR/module_name_repetitions.rs:11:14 | LL | pub enum CakeFoo {} - | ^^^^^^^^^^^^^^^^^^^ + | ^^^^^^^ error: item name starts with its containing module's name - --> $DIR/module_name_repetitions.rs:12:5 + --> $DIR/module_name_repetitions.rs:12:16 | LL | pub struct Foo7Bar; - | ^^^^^^^^^^^^^^^^^^^ + | ^^^^^^^ error: aborting due to 5 previous errors diff --git a/src/tools/clippy/tests/ui/multiple_unsafe_ops_per_block.rs b/src/tools/clippy/tests/ui/multiple_unsafe_ops_per_block.rs new file mode 100644 index 000000000..4511bc99c --- /dev/null +++ b/src/tools/clippy/tests/ui/multiple_unsafe_ops_per_block.rs @@ -0,0 +1,119 @@ +// aux-build:macro_rules.rs +#![allow(unused)] +#![allow(deref_nullptr)] +#![allow(clippy::unnecessary_operation)] +#![allow(clippy::drop_copy)] +#![warn(clippy::multiple_unsafe_ops_per_block)] + +#[macro_use] +extern crate macro_rules; + +use core::arch::asm; + +fn raw_ptr() -> *const () { + core::ptr::null() +} + +unsafe fn not_very_safe() {} + +struct Sample; + +impl Sample { + unsafe fn not_very_safe(&self) {} +} + +#[allow(non_upper_case_globals)] +const sample: Sample = Sample; + +union U { + i: i32, + u: u32, +} + +static mut STATIC: i32 = 0; + +fn test1() { + unsafe { + STATIC += 1; + not_very_safe(); + } +} + +fn test2() { + let u = U { i: 0 }; + + unsafe { + drop(u.u); + *raw_ptr(); + } +} + +fn test3() { + unsafe { + asm!("nop"); + sample.not_very_safe(); + STATIC = 0; + } +} + +fn test_all() { + let u = U { i: 0 }; + unsafe { + drop(u.u); + drop(STATIC); + sample.not_very_safe(); + not_very_safe(); + *raw_ptr(); + asm!("nop"); + } +} + +// no lint +fn correct1() { + unsafe { + STATIC += 1; + } +} + +// no lint +fn correct2() { + unsafe { + STATIC += 1; + } + + unsafe { + *raw_ptr(); + } +} + +// no lint +fn correct3() { + let u = U { u: 0 }; + + unsafe { + not_very_safe(); + } + + unsafe { + drop(u.i); + } +} + +// tests from the issue (https://github.com/rust-lang/rust-clippy/issues/10064) + +unsafe fn read_char_bad(ptr: *const u8) -> char { + unsafe { char::from_u32_unchecked(*ptr.cast::<u32>()) } +} + +// no lint +unsafe fn read_char_good(ptr: *const u8) -> char { + let int_value = unsafe { *ptr.cast::<u32>() }; + unsafe { core::char::from_u32_unchecked(int_value) } +} + +// no lint +fn issue10259() { + unsafe_macro!(); +} + +fn main() {} diff --git a/src/tools/clippy/tests/ui/multiple_unsafe_ops_per_block.stderr b/src/tools/clippy/tests/ui/multiple_unsafe_ops_per_block.stderr new file mode 100644 index 000000000..303aeb7ae --- /dev/null +++ b/src/tools/clippy/tests/ui/multiple_unsafe_ops_per_block.stderr @@ -0,0 +1,129 @@ +error: this `unsafe` block contains 2 unsafe operations, expected only one + --> $DIR/multiple_unsafe_ops_per_block.rs:36:5 + | +LL | / unsafe { +LL | | STATIC += 1; +LL | | not_very_safe(); +LL | | } + | |_____^ + | +note: modification of a mutable static occurs here + --> $DIR/multiple_unsafe_ops_per_block.rs:37:9 + | +LL | STATIC += 1; + | ^^^^^^^^^^^ +note: unsafe function call occurs here + --> $DIR/multiple_unsafe_ops_per_block.rs:38:9 + | +LL | not_very_safe(); + | ^^^^^^^^^^^^^^^ + = note: `-D clippy::multiple-unsafe-ops-per-block` implied by `-D warnings` + +error: this `unsafe` block contains 2 unsafe operations, expected only one + --> $DIR/multiple_unsafe_ops_per_block.rs:45:5 + | +LL | / unsafe { +LL | | drop(u.u); +LL | | *raw_ptr(); +LL | | } + | |_____^ + | +note: union field access occurs here + --> $DIR/multiple_unsafe_ops_per_block.rs:46:14 + | +LL | drop(u.u); + | ^^^ +note: raw pointer dereference occurs here + --> $DIR/multiple_unsafe_ops_per_block.rs:47:9 + | +LL | *raw_ptr(); + | ^^^^^^^^^^ + +error: this `unsafe` block contains 3 unsafe operations, expected only one + --> $DIR/multiple_unsafe_ops_per_block.rs:52:5 + | +LL | / unsafe { +LL | | asm!("nop"); +LL | | sample.not_very_safe(); +LL | | STATIC = 0; +LL | | } + | |_____^ + | +note: inline assembly used here + --> $DIR/multiple_unsafe_ops_per_block.rs:53:9 + | +LL | asm!("nop"); + | ^^^^^^^^^^^ +note: unsafe method call occurs here + --> $DIR/multiple_unsafe_ops_per_block.rs:54:9 + | +LL | sample.not_very_safe(); + | ^^^^^^^^^^^^^^^^^^^^^^ +note: modification of a mutable static occurs here + --> $DIR/multiple_unsafe_ops_per_block.rs:55:9 + | +LL | STATIC = 0; + | ^^^^^^^^^^ + +error: this `unsafe` block contains 6 unsafe operations, expected only one + --> $DIR/multiple_unsafe_ops_per_block.rs:61:5 + | +LL | / unsafe { +LL | | drop(u.u); +LL | | drop(STATIC); +LL | | sample.not_very_safe(); +... | +LL | | asm!("nop"); +LL | | } + | |_____^ + | +note: union field access occurs here + --> $DIR/multiple_unsafe_ops_per_block.rs:62:14 + | +LL | drop(u.u); + | ^^^ +note: access of a mutable static occurs here + --> $DIR/multiple_unsafe_ops_per_block.rs:63:14 + | +LL | drop(STATIC); + | ^^^^^^ +note: unsafe method call occurs here + --> $DIR/multiple_unsafe_ops_per_block.rs:64:9 + | +LL | sample.not_very_safe(); + | ^^^^^^^^^^^^^^^^^^^^^^ +note: unsafe function call occurs here + --> $DIR/multiple_unsafe_ops_per_block.rs:65:9 + | +LL | not_very_safe(); + | ^^^^^^^^^^^^^^^ +note: raw pointer dereference occurs here + --> $DIR/multiple_unsafe_ops_per_block.rs:66:9 + | +LL | *raw_ptr(); + | ^^^^^^^^^^ +note: inline assembly used here + --> $DIR/multiple_unsafe_ops_per_block.rs:67:9 + | +LL | asm!("nop"); + | ^^^^^^^^^^^ + +error: this `unsafe` block contains 2 unsafe operations, expected only one + --> $DIR/multiple_unsafe_ops_per_block.rs:105:5 + | +LL | unsafe { char::from_u32_unchecked(*ptr.cast::<u32>()) } + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +note: unsafe function call occurs here + --> $DIR/multiple_unsafe_ops_per_block.rs:105:14 + | +LL | unsafe { char::from_u32_unchecked(*ptr.cast::<u32>()) } + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +note: raw pointer dereference occurs here + --> $DIR/multiple_unsafe_ops_per_block.rs:105:39 + | +LL | unsafe { char::from_u32_unchecked(*ptr.cast::<u32>()) } + | ^^^^^^^^^^^^^^^^^^ + +error: aborting due to 5 previous errors + diff --git a/src/tools/clippy/tests/ui/must_use_candidates.fixed b/src/tools/clippy/tests/ui/must_use_candidates.fixed index 04a74a009..bbbb3cf62 100644 --- a/src/tools/clippy/tests/ui/must_use_candidates.fixed +++ b/src/tools/clippy/tests/ui/must_use_candidates.fixed @@ -84,7 +84,7 @@ pub unsafe fn mutates_static() -> usize { } #[no_mangle] -pub fn unmangled(i: bool) -> bool { +pub extern "C" fn unmangled(i: bool) -> bool { !i } diff --git a/src/tools/clippy/tests/ui/must_use_candidates.rs b/src/tools/clippy/tests/ui/must_use_candidates.rs index f04122f4e..94d3c83bd 100644 --- a/src/tools/clippy/tests/ui/must_use_candidates.rs +++ b/src/tools/clippy/tests/ui/must_use_candidates.rs @@ -84,7 +84,7 @@ pub unsafe fn mutates_static() -> usize { } #[no_mangle] -pub fn unmangled(i: bool) -> bool { +pub extern "C" fn unmangled(i: bool) -> bool { !i } diff --git a/src/tools/clippy/tests/ui/needless_lifetimes.fixed b/src/tools/clippy/tests/ui/needless_lifetimes.fixed new file mode 100644 index 000000000..f0f1f9298 --- /dev/null +++ b/src/tools/clippy/tests/ui/needless_lifetimes.fixed @@ -0,0 +1,548 @@ +// run-rustfix +// aux-build:macro_rules.rs + +#![warn(clippy::needless_lifetimes)] +#![allow( + unused, + clippy::boxed_local, + clippy::extra_unused_type_parameters, + clippy::needless_pass_by_value, + clippy::unnecessary_wraps, + dyn_drop, + clippy::get_first +)] + +#[macro_use] +extern crate macro_rules; + +fn distinct_lifetimes(_x: &u8, _y: &u8, _z: u8) {} + +fn distinct_and_static(_x: &u8, _y: &u8, _z: &'static u8) {} + +// No error; same lifetime on two params. +fn same_lifetime_on_input<'a>(_x: &'a u8, _y: &'a u8) {} + +// No error; static involved. +fn only_static_on_input(_x: &u8, _y: &u8, _z: &'static u8) {} + +fn mut_and_static_input(_x: &mut u8, _y: &'static str) {} + +fn in_and_out(x: &u8, _y: u8) -> &u8 { + x +} + +// No error; multiple input refs. +fn multiple_in_and_out_1<'a>(x: &'a u8, _y: &'a u8) -> &'a u8 { + x +} + +// Error; multiple input refs, but the output lifetime is not elided, i.e., the following is valid: +// fn multiple_in_and_out_2a<'a>(x: &'a u8, _y: &u8) -> &'a u8 +// ^^^ +fn multiple_in_and_out_2a<'a>(x: &'a u8, _y: &u8) -> &'a u8 { + x +} + +// Error; multiple input refs, but the output lifetime is not elided, i.e., the following is valid: +// fn multiple_in_and_out_2b<'b>(_x: &u8, y: &'b u8) -> &'b u8 +// ^^^ +fn multiple_in_and_out_2b<'b>(_x: &u8, y: &'b u8) -> &'b u8 { + y +} + +// No error; multiple input refs +async fn func<'a>(args: &[&'a str]) -> Option<&'a str> { + args.get(0).cloned() +} + +// No error; static involved. +fn in_static_and_out<'a>(x: &'a u8, _y: &'static u8) -> &'a u8 { + x +} + +// Error; multiple input refs, but the output lifetime is not elided, i.e., the following is valid: +// fn deep_reference_1a<'a>(x: &'a u8, _y: &u8) -> Result<&'a u8, ()> +// ^^^ +fn deep_reference_1a<'a>(x: &'a u8, _y: &u8) -> Result<&'a u8, ()> { + Ok(x) +} + +// Error; multiple input refs, but the output lifetime is not elided, i.e., the following is valid: +// fn deep_reference_1b<'b>(_x: &u8, y: &'b u8) -> Result<&'b u8, ()> +// ^^^ +fn deep_reference_1b<'b>(_x: &u8, y: &'b u8) -> Result<&'b u8, ()> { + Ok(y) +} + +// No error; two input refs. +fn deep_reference_2<'a>(x: Result<&'a u8, &'a u8>) -> &'a u8 { + x.unwrap() +} + +fn deep_reference_3(x: &u8, _y: u8) -> Result<&u8, ()> { + Ok(x) +} + +// Where-clause, but without lifetimes. +fn where_clause_without_lt<T>(x: &u8, _y: u8) -> Result<&u8, ()> +where + T: Copy, +{ + Ok(x) +} + +type Ref<'r> = &'r u8; + +// No error; same lifetime on two params. +fn lifetime_param_1<'a>(_x: Ref<'a>, _y: &'a u8) {} + +fn lifetime_param_2(_x: Ref<'_>, _y: &u8) {} + +// No error; bounded lifetime. +fn lifetime_param_3<'a, 'b: 'a>(_x: Ref<'a>, _y: &'b u8) {} + +// No error; bounded lifetime. +fn lifetime_param_4<'a, 'b>(_x: Ref<'a>, _y: &'b u8) +where + 'b: 'a, +{ +} + +struct Lt<'a, I: 'static> { + x: &'a I, +} + +// No error; fn bound references `'a`. +fn fn_bound<'a, F, I>(_m: Lt<'a, I>, _f: F) -> Lt<'a, I> +where + F: Fn(Lt<'a, I>) -> Lt<'a, I>, +{ + unreachable!() +} + +fn fn_bound_2<F, I>(_m: Lt<'_, I>, _f: F) -> Lt<'_, I> +where + for<'x> F: Fn(Lt<'x, I>) -> Lt<'x, I>, +{ + unreachable!() +} + +// No error; see below. +fn fn_bound_3<'a, F: FnOnce(&'a i32)>(x: &'a i32, f: F) { + f(x); +} + +fn fn_bound_3_cannot_elide() { + let x = 42; + let p = &x; + let mut q = &x; + // This will fail if we elide lifetimes of `fn_bound_3`. + fn_bound_3(p, |y| q = y); +} + +// No error; multiple input refs. +fn fn_bound_4<'a, F: FnOnce() -> &'a ()>(cond: bool, x: &'a (), f: F) -> &'a () { + if cond { x } else { f() } +} + +struct X { + x: u8, +} + +impl X { + fn self_and_out(&self) -> &u8 { + &self.x + } + + // Error; multiple input refs, but the output lifetime is not elided, i.e., the following is valid: + // fn self_and_in_out_1<'s>(&'s self, _x: &u8) -> &'s u8 + // ^^^ + fn self_and_in_out_1<'s>(&'s self, _x: &u8) -> &'s u8 { + &self.x + } + + // Error; multiple input refs, but the output lifetime is not elided, i.e., the following is valid: + // fn self_and_in_out_2<'t>(&self, x: &'t u8) -> &'t u8 + // ^^^^^ + fn self_and_in_out_2<'t>(&self, x: &'t u8) -> &'t u8 { + x + } + + fn distinct_self_and_in(&self, _x: &u8) {} + + // No error; same lifetimes on two params. + fn self_and_same_in<'s>(&'s self, _x: &'s u8) {} +} + +struct Foo<'a>(&'a u8); + +impl<'a> Foo<'a> { + // No error; lifetime `'a` not defined in method. + fn self_shared_lifetime(&self, _: &'a u8) {} + // No error; bounds exist. + fn self_bound_lifetime<'b: 'a>(&self, _: &'b u8) {} +} + +fn already_elided<'a>(_: &u8, _: &'a u8) -> &'a u8 { + unimplemented!() +} + +fn struct_with_lt(_foo: Foo<'_>) -> &str { + unimplemented!() +} + +// No warning; two input lifetimes (named on the reference, anonymous on `Foo`). +fn struct_with_lt2<'a>(_foo: &'a Foo) -> &'a str { + unimplemented!() +} + +// No warning; two input lifetimes (anonymous on the reference, named on `Foo`). +fn struct_with_lt3<'a>(_foo: &Foo<'a>) -> &'a str { + unimplemented!() +} + +// Warning; two input lifetimes, but the output lifetime is not elided, i.e., the following is +// valid: +// fn struct_with_lt4a<'a>(_foo: &'a Foo<'_>) -> &'a str +// ^^ +fn struct_with_lt4a<'a>(_foo: &'a Foo<'_>) -> &'a str { + unimplemented!() +} + +// Warning; two input lifetimes, but the output lifetime is not elided, i.e., the following is +// valid: +// fn struct_with_lt4b<'b>(_foo: &Foo<'b>) -> &'b str +// ^^^^ +fn struct_with_lt4b<'b>(_foo: &Foo<'b>) -> &'b str { + unimplemented!() +} + +trait WithLifetime<'a> {} + +type WithLifetimeAlias<'a> = dyn WithLifetime<'a>; + +// Should not warn because it won't build without the lifetime. +fn trait_obj_elided<'a>(_arg: &'a dyn WithLifetime) -> &'a str { + unimplemented!() +} + +// Should warn because there is no lifetime on `Drop`, so this would be +// unambiguous if we elided the lifetime. +fn trait_obj_elided2(_arg: &dyn Drop) -> &str { + unimplemented!() +} + +type FooAlias<'a> = Foo<'a>; + +fn alias_with_lt(_foo: FooAlias<'_>) -> &str { + unimplemented!() +} + +// No warning; two input lifetimes (named on the reference, anonymous on `FooAlias`). +fn alias_with_lt2<'a>(_foo: &'a FooAlias) -> &'a str { + unimplemented!() +} + +// No warning; two input lifetimes (anonymous on the reference, named on `FooAlias`). +fn alias_with_lt3<'a>(_foo: &FooAlias<'a>) -> &'a str { + unimplemented!() +} + +// Warning; two input lifetimes, but the output lifetime is not elided, i.e., the following is +// valid: +// fn alias_with_lt4a<'a>(_foo: &'a FooAlias<'_>) -> &'a str +// ^^ +fn alias_with_lt4a<'a>(_foo: &'a FooAlias<'_>) -> &'a str { + unimplemented!() +} + +// Warning; two input lifetimes, but the output lifetime is not elided, i.e., the following is +// valid: +// fn alias_with_lt4b<'b>(_foo: &FooAlias<'b>) -> &'b str +// ^^^^^^^^^ +fn alias_with_lt4b<'b>(_foo: &FooAlias<'b>) -> &'b str { + unimplemented!() +} + +fn named_input_elided_output(_arg: &str) -> &str { + unimplemented!() +} + +fn elided_input_named_output<'a>(_arg: &str) -> &'a str { + unimplemented!() +} + +fn trait_bound_ok<T: WithLifetime<'static>>(_: &u8, _: T) { + unimplemented!() +} +fn trait_bound<'a, T: WithLifetime<'a>>(_: &'a u8, _: T) { + unimplemented!() +} + +// Don't warn on these; see issue #292. +fn trait_bound_bug<'a, T: WithLifetime<'a>>() { + unimplemented!() +} + +// See issue #740. +struct Test { + vec: Vec<usize>, +} + +impl Test { + fn iter<'a>(&'a self) -> Box<dyn Iterator<Item = usize> + 'a> { + unimplemented!() + } +} + +trait LintContext<'a> {} + +fn f<'a, T: LintContext<'a>>(_: &T) {} + +fn test<'a>(x: &'a [u8]) -> u8 { + let y: &'a u8 = &x[5]; + *y +} + +// Issue #3284: give hint regarding lifetime in return type. +struct Cow<'a> { + x: &'a str, +} +fn out_return_type_lts(e: &str) -> Cow<'_> { + unimplemented!() +} + +// Make sure we still warn on implementations +mod issue4291 { + trait BadTrait { + fn needless_lt(x: &u8) {} + } + + impl BadTrait for () { + fn needless_lt(_x: &u8) {} + } +} + +mod issue2944 { + trait Foo {} + struct Bar; + struct Baz<'a> { + bar: &'a Bar, + } + + impl<'a> Foo for Baz<'a> {} + impl Bar { + fn baz(&self) -> impl Foo + '_ { + Baz { bar: self } + } + } +} + +mod nested_elision_sites { + // issue #issue2944 + + // closure trait bounds subject to nested elision + // don't lint because they refer to outer lifetimes + fn trait_fn<'a>(i: &'a i32) -> impl Fn() -> &'a i32 { + move || i + } + fn trait_fn_mut<'a>(i: &'a i32) -> impl FnMut() -> &'a i32 { + move || i + } + fn trait_fn_once<'a>(i: &'a i32) -> impl FnOnce() -> &'a i32 { + move || i + } + + // don't lint + fn impl_trait_in_input_position<'a>(f: impl Fn() -> &'a i32) -> &'a i32 { + f() + } + fn impl_trait_in_output_position<'a>(i: &'a i32) -> impl Fn() -> &'a i32 { + move || i + } + // lint + fn impl_trait_elidable_nested_named_lifetimes<'a>(i: &'a i32, f: impl for<'b> Fn(&'b i32) -> &'b i32) -> &'a i32 { + f(i) + } + fn impl_trait_elidable_nested_anonymous_lifetimes(i: &i32, f: impl Fn(&i32) -> &i32) -> &i32 { + f(i) + } + + // don't lint + fn generics_not_elidable<'a, T: Fn() -> &'a i32>(f: T) -> &'a i32 { + f() + } + // lint + fn generics_elidable<T: Fn(&i32) -> &i32>(i: &i32, f: T) -> &i32 { + f(i) + } + + // don't lint + fn where_clause_not_elidable<'a, T>(f: T) -> &'a i32 + where + T: Fn() -> &'a i32, + { + f() + } + // lint + fn where_clause_elidadable<T>(i: &i32, f: T) -> &i32 + where + T: Fn(&i32) -> &i32, + { + f(i) + } + + // don't lint + fn pointer_fn_in_input_position<'a>(f: fn(&'a i32) -> &'a i32, i: &'a i32) -> &'a i32 { + f(i) + } + fn pointer_fn_in_output_position<'a>(_: &'a i32) -> fn(&'a i32) -> &'a i32 { + |i| i + } + // lint + fn pointer_fn_elidable(i: &i32, f: fn(&i32) -> &i32) -> &i32 { + f(i) + } + + // don't lint + fn nested_fn_pointer_1<'a>(_: &'a i32) -> fn(fn(&'a i32) -> &'a i32) -> i32 { + |f| 42 + } + fn nested_fn_pointer_2<'a>(_: &'a i32) -> impl Fn(fn(&'a i32)) { + |f| () + } + + // lint + fn nested_fn_pointer_3(_: &i32) -> fn(fn(&i32) -> &i32) -> i32 { + |f| 42 + } + fn nested_fn_pointer_4(_: &i32) -> impl Fn(fn(&i32)) { + |f| () + } +} + +mod issue6159 { + use std::ops::Deref; + pub fn apply_deref<'a, T, F, R>(x: &'a T, f: F) -> R + where + T: Deref, + F: FnOnce(&'a T::Target) -> R, + { + f(x.deref()) + } +} + +mod issue7296 { + use std::rc::Rc; + use std::sync::Arc; + + struct Foo; + impl Foo { + fn implicit(&self) -> &() { + &() + } + fn implicit_mut(&mut self) -> &() { + &() + } + + fn explicit<'a>(self: &'a Arc<Self>) -> &'a () { + &() + } + fn explicit_mut<'a>(self: &'a mut Rc<Self>) -> &'a () { + &() + } + + fn lifetime_elsewhere(self: Box<Self>, here: &()) -> &() { + &() + } + } + + trait Bar { + fn implicit(&self) -> &(); + fn implicit_provided(&self) -> &() { + &() + } + + fn explicit<'a>(self: &'a Arc<Self>) -> &'a (); + fn explicit_provided<'a>(self: &'a Arc<Self>) -> &'a () { + &() + } + + fn lifetime_elsewhere(self: Box<Self>, here: &()) -> &(); + fn lifetime_elsewhere_provided(self: Box<Self>, here: &()) -> &() { + &() + } + } +} + +mod pr_9743_false_negative_fix { + #![allow(unused)] + + fn foo(x: &u8, y: &'_ u8) {} + + fn bar(x: &u8, y: &'_ u8, z: &'_ u8) {} +} + +mod pr_9743_output_lifetime_checks { + #![allow(unused)] + + // lint: only one input + fn one_input(x: &u8) -> &u8 { + unimplemented!() + } + + // lint: multiple inputs, output would not be elided + fn multiple_inputs_output_not_elided<'b>(x: &u8, y: &'b u8, z: &'b u8) -> &'b u8 { + unimplemented!() + } + + // don't lint: multiple inputs, output would be elided (which would create an ambiguity) + fn multiple_inputs_output_would_be_elided<'a, 'b>(x: &'a u8, y: &'b u8, z: &'b u8) -> &'a u8 { + unimplemented!() + } +} + +mod in_macro { + macro_rules! local_one_input_macro { + () => { + fn one_input(x: &u8) -> &u8 { + unimplemented!() + } + }; + } + + // lint local macro expands to function with needless lifetimes + local_one_input_macro!(); + + // no lint on external macro + macro_rules::needless_lifetime!(); + + macro_rules! expanded_lifetime { + ($l:lifetime) => { + fn f<$l>(arg: &$l str) -> &$l str { + arg + } + } + } + + expanded_lifetime!('a); +} + +mod issue5787 { + use std::sync::MutexGuard; + + struct Foo; + + impl Foo { + // doesn't get linted without async + pub async fn wait<'a, T>(&self, guard: MutexGuard<'a, T>) -> MutexGuard<'a, T> { + guard + } + } + + async fn foo<'a>(_x: &i32, y: &'a str) -> &'a str { + y + } +} + +fn main() {} diff --git a/src/tools/clippy/tests/ui/needless_lifetimes.rs b/src/tools/clippy/tests/ui/needless_lifetimes.rs index 2efc93675..ddfd10430 100644 --- a/src/tools/clippy/tests/ui/needless_lifetimes.rs +++ b/src/tools/clippy/tests/ui/needless_lifetimes.rs @@ -1,13 +1,20 @@ +// run-rustfix +// aux-build:macro_rules.rs + #![warn(clippy::needless_lifetimes)] #![allow( - dead_code, + unused, clippy::boxed_local, + clippy::extra_unused_type_parameters, clippy::needless_pass_by_value, clippy::unnecessary_wraps, dyn_drop, clippy::get_first )] +#[macro_use] +extern crate macro_rules; + fn distinct_lifetimes<'a, 'b>(_x: &'a u8, _y: &'b u8, _z: u8) {} fn distinct_and_static<'a, 'b>(_x: &'a u8, _y: &'b u8, _z: &'static u8) {} @@ -495,4 +502,47 @@ mod pr_9743_output_lifetime_checks { } } +mod in_macro { + macro_rules! local_one_input_macro { + () => { + fn one_input<'a>(x: &'a u8) -> &'a u8 { + unimplemented!() + } + }; + } + + // lint local macro expands to function with needless lifetimes + local_one_input_macro!(); + + // no lint on external macro + macro_rules::needless_lifetime!(); + + macro_rules! expanded_lifetime { + ($l:lifetime) => { + fn f<$l>(arg: &$l str) -> &$l str { + arg + } + } + } + + expanded_lifetime!('a); +} + +mod issue5787 { + use std::sync::MutexGuard; + + struct Foo; + + impl Foo { + // doesn't get linted without async + pub async fn wait<'a, T>(&self, guard: MutexGuard<'a, T>) -> MutexGuard<'a, T> { + guard + } + } + + async fn foo<'a>(_x: &i32, y: &'a str) -> &'a str { + y + } +} + fn main() {} diff --git a/src/tools/clippy/tests/ui/needless_lifetimes.stderr b/src/tools/clippy/tests/ui/needless_lifetimes.stderr index 5a7cf13c8..4e3c8f20d 100644 --- a/src/tools/clippy/tests/ui/needless_lifetimes.stderr +++ b/src/tools/clippy/tests/ui/needless_lifetimes.stderr @@ -1,316 +1,559 @@ error: the following explicit lifetimes could be elided: 'a, 'b - --> $DIR/needless_lifetimes.rs:11:1 + --> $DIR/needless_lifetimes.rs:18:1 | LL | fn distinct_lifetimes<'a, 'b>(_x: &'a u8, _y: &'b u8, _z: u8) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: `-D clippy::needless-lifetimes` implied by `-D warnings` +help: elide the lifetimes + | +LL - fn distinct_lifetimes<'a, 'b>(_x: &'a u8, _y: &'b u8, _z: u8) {} +LL + fn distinct_lifetimes(_x: &u8, _y: &u8, _z: u8) {} + | error: the following explicit lifetimes could be elided: 'a, 'b - --> $DIR/needless_lifetimes.rs:13:1 + --> $DIR/needless_lifetimes.rs:20:1 | LL | fn distinct_and_static<'a, 'b>(_x: &'a u8, _y: &'b u8, _z: &'static u8) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn distinct_and_static<'a, 'b>(_x: &'a u8, _y: &'b u8, _z: &'static u8) {} +LL + fn distinct_and_static(_x: &u8, _y: &u8, _z: &'static u8) {} + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:23:1 + --> $DIR/needless_lifetimes.rs:30:1 | LL | fn in_and_out<'a>(x: &'a u8, _y: u8) -> &'a u8 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn in_and_out<'a>(x: &'a u8, _y: u8) -> &'a u8 { +LL + fn in_and_out(x: &u8, _y: u8) -> &u8 { + | error: the following explicit lifetimes could be elided: 'b - --> $DIR/needless_lifetimes.rs:35:1 + --> $DIR/needless_lifetimes.rs:42:1 | LL | fn multiple_in_and_out_2a<'a, 'b>(x: &'a u8, _y: &'b u8) -> &'a u8 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn multiple_in_and_out_2a<'a, 'b>(x: &'a u8, _y: &'b u8) -> &'a u8 { +LL + fn multiple_in_and_out_2a<'a>(x: &'a u8, _y: &u8) -> &'a u8 { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:42:1 + --> $DIR/needless_lifetimes.rs:49:1 | LL | fn multiple_in_and_out_2b<'a, 'b>(_x: &'a u8, y: &'b u8) -> &'b u8 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn multiple_in_and_out_2b<'a, 'b>(_x: &'a u8, y: &'b u8) -> &'b u8 { +LL + fn multiple_in_and_out_2b<'b>(_x: &u8, y: &'b u8) -> &'b u8 { + | error: the following explicit lifetimes could be elided: 'b - --> $DIR/needless_lifetimes.rs:59:1 + --> $DIR/needless_lifetimes.rs:66:1 | LL | fn deep_reference_1a<'a, 'b>(x: &'a u8, _y: &'b u8) -> Result<&'a u8, ()> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn deep_reference_1a<'a, 'b>(x: &'a u8, _y: &'b u8) -> Result<&'a u8, ()> { +LL + fn deep_reference_1a<'a>(x: &'a u8, _y: &u8) -> Result<&'a u8, ()> { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:66:1 + --> $DIR/needless_lifetimes.rs:73:1 | LL | fn deep_reference_1b<'a, 'b>(_x: &'a u8, y: &'b u8) -> Result<&'b u8, ()> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn deep_reference_1b<'a, 'b>(_x: &'a u8, y: &'b u8) -> Result<&'b u8, ()> { +LL + fn deep_reference_1b<'b>(_x: &u8, y: &'b u8) -> Result<&'b u8, ()> { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:75:1 + --> $DIR/needless_lifetimes.rs:82:1 | LL | fn deep_reference_3<'a>(x: &'a u8, _y: u8) -> Result<&'a u8, ()> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn deep_reference_3<'a>(x: &'a u8, _y: u8) -> Result<&'a u8, ()> { +LL + fn deep_reference_3(x: &u8, _y: u8) -> Result<&u8, ()> { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:80:1 + --> $DIR/needless_lifetimes.rs:87:1 | LL | fn where_clause_without_lt<'a, T>(x: &'a u8, _y: u8) -> Result<&'a u8, ()> | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn where_clause_without_lt<'a, T>(x: &'a u8, _y: u8) -> Result<&'a u8, ()> +LL + fn where_clause_without_lt<T>(x: &u8, _y: u8) -> Result<&u8, ()> + | error: the following explicit lifetimes could be elided: 'a, 'b - --> $DIR/needless_lifetimes.rs:92:1 + --> $DIR/needless_lifetimes.rs:99:1 | LL | fn lifetime_param_2<'a, 'b>(_x: Ref<'a>, _y: &'b u8) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | -help: replace with `'_` in generic arguments such as here - --> $DIR/needless_lifetimes.rs:92:37 +help: elide the lifetimes + | +LL - fn lifetime_param_2<'a, 'b>(_x: Ref<'a>, _y: &'b u8) {} +LL + fn lifetime_param_2(_x: Ref<'_>, _y: &u8) {} | -LL | fn lifetime_param_2<'a, 'b>(_x: Ref<'a>, _y: &'b u8) {} - | ^^ error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:116:1 + --> $DIR/needless_lifetimes.rs:123:1 | LL | fn fn_bound_2<'a, F, I>(_m: Lt<'a, I>, _f: F) -> Lt<'a, I> | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | -help: replace with `'_` in generic arguments such as here - --> $DIR/needless_lifetimes.rs:116:32 +help: elide the lifetimes + | +LL - fn fn_bound_2<'a, F, I>(_m: Lt<'a, I>, _f: F) -> Lt<'a, I> +LL + fn fn_bound_2<F, I>(_m: Lt<'_, I>, _f: F) -> Lt<'_, I> | -LL | fn fn_bound_2<'a, F, I>(_m: Lt<'a, I>, _f: F) -> Lt<'a, I> - | ^^ error: the following explicit lifetimes could be elided: 's - --> $DIR/needless_lifetimes.rs:146:5 + --> $DIR/needless_lifetimes.rs:153:5 | LL | fn self_and_out<'s>(&'s self) -> &'s u8 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn self_and_out<'s>(&'s self) -> &'s u8 { +LL + fn self_and_out(&self) -> &u8 { + | error: the following explicit lifetimes could be elided: 't - --> $DIR/needless_lifetimes.rs:153:5 + --> $DIR/needless_lifetimes.rs:160:5 | LL | fn self_and_in_out_1<'s, 't>(&'s self, _x: &'t u8) -> &'s u8 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn self_and_in_out_1<'s, 't>(&'s self, _x: &'t u8) -> &'s u8 { +LL + fn self_and_in_out_1<'s>(&'s self, _x: &u8) -> &'s u8 { + | error: the following explicit lifetimes could be elided: 's - --> $DIR/needless_lifetimes.rs:160:5 + --> $DIR/needless_lifetimes.rs:167:5 | LL | fn self_and_in_out_2<'s, 't>(&'s self, x: &'t u8) -> &'t u8 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn self_and_in_out_2<'s, 't>(&'s self, x: &'t u8) -> &'t u8 { +LL + fn self_and_in_out_2<'t>(&self, x: &'t u8) -> &'t u8 { + | error: the following explicit lifetimes could be elided: 's, 't - --> $DIR/needless_lifetimes.rs:164:5 + --> $DIR/needless_lifetimes.rs:171:5 | LL | fn distinct_self_and_in<'s, 't>(&'s self, _x: &'t u8) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn distinct_self_and_in<'s, 't>(&'s self, _x: &'t u8) {} +LL + fn distinct_self_and_in(&self, _x: &u8) {} + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:183:1 + --> $DIR/needless_lifetimes.rs:190:1 | LL | fn struct_with_lt<'a>(_foo: Foo<'a>) -> &'a str { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | -help: replace with `'_` in generic arguments such as here - --> $DIR/needless_lifetimes.rs:183:33 +help: elide the lifetimes + | +LL - fn struct_with_lt<'a>(_foo: Foo<'a>) -> &'a str { +LL + fn struct_with_lt(_foo: Foo<'_>) -> &str { | -LL | fn struct_with_lt<'a>(_foo: Foo<'a>) -> &'a str { - | ^^ error: the following explicit lifetimes could be elided: 'b - --> $DIR/needless_lifetimes.rs:201:1 + --> $DIR/needless_lifetimes.rs:208:1 | LL | fn struct_with_lt4a<'a, 'b>(_foo: &'a Foo<'b>) -> &'a str { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | -help: replace with `'_` in generic arguments such as here - --> $DIR/needless_lifetimes.rs:201:43 +help: elide the lifetimes + | +LL - fn struct_with_lt4a<'a, 'b>(_foo: &'a Foo<'b>) -> &'a str { +LL + fn struct_with_lt4a<'a>(_foo: &'a Foo<'_>) -> &'a str { | -LL | fn struct_with_lt4a<'a, 'b>(_foo: &'a Foo<'b>) -> &'a str { - | ^^ error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:209:1 + --> $DIR/needless_lifetimes.rs:216:1 | LL | fn struct_with_lt4b<'a, 'b>(_foo: &'a Foo<'b>) -> &'b str { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn struct_with_lt4b<'a, 'b>(_foo: &'a Foo<'b>) -> &'b str { +LL + fn struct_with_lt4b<'b>(_foo: &Foo<'b>) -> &'b str { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:224:1 + --> $DIR/needless_lifetimes.rs:231:1 | LL | fn trait_obj_elided2<'a>(_arg: &'a dyn Drop) -> &'a str { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn trait_obj_elided2<'a>(_arg: &'a dyn Drop) -> &'a str { +LL + fn trait_obj_elided2(_arg: &dyn Drop) -> &str { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:230:1 + --> $DIR/needless_lifetimes.rs:237:1 | LL | fn alias_with_lt<'a>(_foo: FooAlias<'a>) -> &'a str { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | -help: replace with `'_` in generic arguments such as here - --> $DIR/needless_lifetimes.rs:230:37 +help: elide the lifetimes + | +LL - fn alias_with_lt<'a>(_foo: FooAlias<'a>) -> &'a str { +LL + fn alias_with_lt(_foo: FooAlias<'_>) -> &str { | -LL | fn alias_with_lt<'a>(_foo: FooAlias<'a>) -> &'a str { - | ^^ error: the following explicit lifetimes could be elided: 'b - --> $DIR/needless_lifetimes.rs:248:1 + --> $DIR/needless_lifetimes.rs:255:1 | LL | fn alias_with_lt4a<'a, 'b>(_foo: &'a FooAlias<'b>) -> &'a str { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | -help: replace with `'_` in generic arguments such as here - --> $DIR/needless_lifetimes.rs:248:47 +help: elide the lifetimes + | +LL - fn alias_with_lt4a<'a, 'b>(_foo: &'a FooAlias<'b>) -> &'a str { +LL + fn alias_with_lt4a<'a>(_foo: &'a FooAlias<'_>) -> &'a str { | -LL | fn alias_with_lt4a<'a, 'b>(_foo: &'a FooAlias<'b>) -> &'a str { - | ^^ error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:256:1 + --> $DIR/needless_lifetimes.rs:263:1 | LL | fn alias_with_lt4b<'a, 'b>(_foo: &'a FooAlias<'b>) -> &'b str { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn alias_with_lt4b<'a, 'b>(_foo: &'a FooAlias<'b>) -> &'b str { +LL + fn alias_with_lt4b<'b>(_foo: &FooAlias<'b>) -> &'b str { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:260:1 + --> $DIR/needless_lifetimes.rs:267:1 | LL | fn named_input_elided_output<'a>(_arg: &'a str) -> &str { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn named_input_elided_output<'a>(_arg: &'a str) -> &str { +LL + fn named_input_elided_output(_arg: &str) -> &str { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:268:1 + --> $DIR/needless_lifetimes.rs:275:1 | LL | fn trait_bound_ok<'a, T: WithLifetime<'static>>(_: &'a u8, _: T) { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn trait_bound_ok<'a, T: WithLifetime<'static>>(_: &'a u8, _: T) { +LL + fn trait_bound_ok<T: WithLifetime<'static>>(_: &u8, _: T) { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:304:1 + --> $DIR/needless_lifetimes.rs:311:1 | LL | fn out_return_type_lts<'a>(e: &'a str) -> Cow<'a> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | -help: replace with `'_` in generic arguments such as here - --> $DIR/needless_lifetimes.rs:304:47 +help: elide the lifetimes + | +LL - fn out_return_type_lts<'a>(e: &'a str) -> Cow<'a> { +LL + fn out_return_type_lts(e: &str) -> Cow<'_> { | -LL | fn out_return_type_lts<'a>(e: &'a str) -> Cow<'a> { - | ^^ error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:311:9 + --> $DIR/needless_lifetimes.rs:318:9 | LL | fn needless_lt<'a>(x: &'a u8) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn needless_lt<'a>(x: &'a u8) {} +LL + fn needless_lt(x: &u8) {} + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:315:9 + --> $DIR/needless_lifetimes.rs:322:9 | LL | fn needless_lt<'a>(_x: &'a u8) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn needless_lt<'a>(_x: &'a u8) {} +LL + fn needless_lt(_x: &u8) {} + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:328:9 + --> $DIR/needless_lifetimes.rs:335:9 | LL | fn baz<'a>(&'a self) -> impl Foo + 'a { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn baz<'a>(&'a self) -> impl Foo + 'a { +LL + fn baz(&self) -> impl Foo + '_ { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:360:5 + --> $DIR/needless_lifetimes.rs:367:5 | LL | fn impl_trait_elidable_nested_anonymous_lifetimes<'a>(i: &'a i32, f: impl Fn(&i32) -> &i32) -> &'a i32 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn impl_trait_elidable_nested_anonymous_lifetimes<'a>(i: &'a i32, f: impl Fn(&i32) -> &i32) -> &'a i32 { +LL + fn impl_trait_elidable_nested_anonymous_lifetimes(i: &i32, f: impl Fn(&i32) -> &i32) -> &i32 { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:369:5 + --> $DIR/needless_lifetimes.rs:376:5 | LL | fn generics_elidable<'a, T: Fn(&i32) -> &i32>(i: &'a i32, f: T) -> &'a i32 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn generics_elidable<'a, T: Fn(&i32) -> &i32>(i: &'a i32, f: T) -> &'a i32 { +LL + fn generics_elidable<T: Fn(&i32) -> &i32>(i: &i32, f: T) -> &i32 { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:381:5 + --> $DIR/needless_lifetimes.rs:388:5 | LL | fn where_clause_elidadable<'a, T>(i: &'a i32, f: T) -> &'a i32 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn where_clause_elidadable<'a, T>(i: &'a i32, f: T) -> &'a i32 +LL + fn where_clause_elidadable<T>(i: &i32, f: T) -> &i32 + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:396:5 + --> $DIR/needless_lifetimes.rs:403:5 | LL | fn pointer_fn_elidable<'a>(i: &'a i32, f: fn(&i32) -> &i32) -> &'a i32 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn pointer_fn_elidable<'a>(i: &'a i32, f: fn(&i32) -> &i32) -> &'a i32 { +LL + fn pointer_fn_elidable(i: &i32, f: fn(&i32) -> &i32) -> &i32 { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:409:5 + --> $DIR/needless_lifetimes.rs:416:5 | LL | fn nested_fn_pointer_3<'a>(_: &'a i32) -> fn(fn(&i32) -> &i32) -> i32 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn nested_fn_pointer_3<'a>(_: &'a i32) -> fn(fn(&i32) -> &i32) -> i32 { +LL + fn nested_fn_pointer_3(_: &i32) -> fn(fn(&i32) -> &i32) -> i32 { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:412:5 + --> $DIR/needless_lifetimes.rs:419:5 | LL | fn nested_fn_pointer_4<'a>(_: &'a i32) -> impl Fn(fn(&i32)) { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn nested_fn_pointer_4<'a>(_: &'a i32) -> impl Fn(fn(&i32)) { +LL + fn nested_fn_pointer_4(_: &i32) -> impl Fn(fn(&i32)) { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:434:9 + --> $DIR/needless_lifetimes.rs:441:9 | LL | fn implicit<'a>(&'a self) -> &'a () { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn implicit<'a>(&'a self) -> &'a () { +LL + fn implicit(&self) -> &() { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:437:9 + --> $DIR/needless_lifetimes.rs:444:9 | LL | fn implicit_mut<'a>(&'a mut self) -> &'a () { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn implicit_mut<'a>(&'a mut self) -> &'a () { +LL + fn implicit_mut(&mut self) -> &() { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:448:9 + --> $DIR/needless_lifetimes.rs:455:9 | LL | fn lifetime_elsewhere<'a>(self: Box<Self>, here: &'a ()) -> &'a () { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn lifetime_elsewhere<'a>(self: Box<Self>, here: &'a ()) -> &'a () { +LL + fn lifetime_elsewhere(self: Box<Self>, here: &()) -> &() { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:454:9 + --> $DIR/needless_lifetimes.rs:461:9 | LL | fn implicit<'a>(&'a self) -> &'a (); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn implicit<'a>(&'a self) -> &'a (); +LL + fn implicit(&self) -> &(); + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:455:9 + --> $DIR/needless_lifetimes.rs:462:9 | LL | fn implicit_provided<'a>(&'a self) -> &'a () { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn implicit_provided<'a>(&'a self) -> &'a () { +LL + fn implicit_provided(&self) -> &() { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:464:9 + --> $DIR/needless_lifetimes.rs:471:9 | LL | fn lifetime_elsewhere<'a>(self: Box<Self>, here: &'a ()) -> &'a (); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn lifetime_elsewhere<'a>(self: Box<Self>, here: &'a ()) -> &'a (); +LL + fn lifetime_elsewhere(self: Box<Self>, here: &()) -> &(); + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:465:9 + --> $DIR/needless_lifetimes.rs:472:9 | LL | fn lifetime_elsewhere_provided<'a>(self: Box<Self>, here: &'a ()) -> &'a () { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn lifetime_elsewhere_provided<'a>(self: Box<Self>, here: &'a ()) -> &'a () { +LL + fn lifetime_elsewhere_provided(self: Box<Self>, here: &()) -> &() { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:474:5 + --> $DIR/needless_lifetimes.rs:481:5 | LL | fn foo<'a>(x: &'a u8, y: &'_ u8) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn foo<'a>(x: &'a u8, y: &'_ u8) {} +LL + fn foo(x: &u8, y: &'_ u8) {} + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:476:5 + --> $DIR/needless_lifetimes.rs:483:5 | LL | fn bar<'a>(x: &'a u8, y: &'_ u8, z: &'_ u8) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn bar<'a>(x: &'a u8, y: &'_ u8, z: &'_ u8) {} +LL + fn bar(x: &u8, y: &'_ u8, z: &'_ u8) {} + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:483:5 + --> $DIR/needless_lifetimes.rs:490:5 | LL | fn one_input<'a>(x: &'a u8) -> &'a u8 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn one_input<'a>(x: &'a u8) -> &'a u8 { +LL + fn one_input(x: &u8) -> &u8 { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:488:5 + --> $DIR/needless_lifetimes.rs:495:5 | LL | fn multiple_inputs_output_not_elided<'a, 'b>(x: &'a u8, y: &'b u8, z: &'b u8) -> &'b u8 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn multiple_inputs_output_not_elided<'a, 'b>(x: &'a u8, y: &'b u8, z: &'b u8) -> &'b u8 { +LL + fn multiple_inputs_output_not_elided<'b>(x: &u8, y: &'b u8, z: &'b u8) -> &'b u8 { + | + +error: the following explicit lifetimes could be elided: 'a + --> $DIR/needless_lifetimes.rs:508:13 + | +LL | fn one_input<'a>(x: &'a u8) -> &'a u8 { + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +... +LL | local_one_input_macro!(); + | ------------------------ in this macro invocation + | + = note: this error originates in the macro `local_one_input_macro` (in Nightly builds, run with -Z macro-backtrace for more info) +help: elide the lifetimes + | +LL - fn one_input<'a>(x: &'a u8) -> &'a u8 { +LL + fn one_input(x: &u8) -> &u8 { + | -error: aborting due to 45 previous errors +error: aborting due to 46 previous errors diff --git a/src/tools/clippy/tests/ui/needless_range_loop.stderr b/src/tools/clippy/tests/ui/needless_range_loop.stderr index b31544ec3..cffa19bec 100644 --- a/src/tools/clippy/tests/ui/needless_range_loop.stderr +++ b/src/tools/clippy/tests/ui/needless_range_loop.stderr @@ -49,7 +49,7 @@ error: the loop variable `i` is used to index `vec` LL | for i in 0..vec.len() { | ^^^^^^^^^^^^ | -help: consider using an iterator +help: consider using an iterator and enumerate() | LL | for (i, <item>) in vec.iter().enumerate() { | ~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~ @@ -126,7 +126,7 @@ error: the loop variable `i` is used to index `vec` LL | for i in 5..vec.len() { | ^^^^^^^^^^^^ | -help: consider using an iterator +help: consider using an iterator and enumerate() | LL | for (i, <item>) in vec.iter().enumerate().skip(5) { | ~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ @@ -137,7 +137,7 @@ error: the loop variable `i` is used to index `vec` LL | for i in 5..10 { | ^^^^^ | -help: consider using an iterator +help: consider using an iterator and enumerate() | LL | for (i, <item>) in vec.iter().enumerate().take(10).skip(5) { | ~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ @@ -148,7 +148,7 @@ error: the loop variable `i` is used to index `vec` LL | for i in 0..vec.len() { | ^^^^^^^^^^^^ | -help: consider using an iterator +help: consider using an iterator and enumerate() | LL | for (i, <item>) in vec.iter_mut().enumerate() { | ~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~ diff --git a/src/tools/clippy/tests/ui/needless_return.fixed b/src/tools/clippy/tests/ui/needless_return.fixed index ab1c0e590..0f525dd29 100644 --- a/src/tools/clippy/tests/ui/needless_return.fixed +++ b/src/tools/clippy/tests/ui/needless_return.fixed @@ -31,6 +31,16 @@ fn test_no_semicolon() -> bool { true } +#[rustfmt::skip] +fn test_multiple_semicolon() -> bool { + true +} + +#[rustfmt::skip] +fn test_multiple_semicolon_with_spaces() -> bool { + true +} + fn test_if_block() -> bool { if true { true @@ -287,4 +297,14 @@ fn issue10051() -> Result<String, String> { } } +mod issue10049 { + fn single() -> u32 { + if true { 1 } else { 2 } + } + + fn multiple(b1: bool, b2: bool, b3: bool) -> u32 { + (if b1 { 0 } else { 1 } | if b2 { 2 } else { 3 } | if b3 { 4 } else { 5 }) + } +} + fn main() {} diff --git a/src/tools/clippy/tests/ui/needless_return.rs b/src/tools/clippy/tests/ui/needless_return.rs index abed338bb..a1db8375d 100644 --- a/src/tools/clippy/tests/ui/needless_return.rs +++ b/src/tools/clippy/tests/ui/needless_return.rs @@ -31,6 +31,16 @@ fn test_no_semicolon() -> bool { return true; } +#[rustfmt::skip] +fn test_multiple_semicolon() -> bool { + return true;;; +} + +#[rustfmt::skip] +fn test_multiple_semicolon_with_spaces() -> bool { + return true;; ; ; +} + fn test_if_block() -> bool { if true { return true; @@ -297,4 +307,14 @@ fn issue10051() -> Result<String, String> { } } +mod issue10049 { + fn single() -> u32 { + return if true { 1 } else { 2 }; + } + + fn multiple(b1: bool, b2: bool, b3: bool) -> u32 { + return if b1 { 0 } else { 1 } | if b2 { 2 } else { 3 } | if b3 { 4 } else { 5 }; + } +} + fn main() {} diff --git a/src/tools/clippy/tests/ui/needless_return.stderr b/src/tools/clippy/tests/ui/needless_return.stderr index 52eabf6e1..87d0cd3e1 100644 --- a/src/tools/clippy/tests/ui/needless_return.stderr +++ b/src/tools/clippy/tests/ui/needless_return.stderr @@ -16,7 +16,23 @@ LL | return true; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:36:9 + --> $DIR/needless_return.rs:36:5 + | +LL | return true;;; + | ^^^^^^^^^^^ + | + = help: remove `return` + +error: unneeded `return` statement + --> $DIR/needless_return.rs:41:5 + | +LL | return true;; ; ; + | ^^^^^^^^^^^ + | + = help: remove `return` + +error: unneeded `return` statement + --> $DIR/needless_return.rs:46:9 | LL | return true; | ^^^^^^^^^^^ @@ -24,7 +40,7 @@ LL | return true; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:38:9 + --> $DIR/needless_return.rs:48:9 | LL | return false; | ^^^^^^^^^^^^ @@ -32,7 +48,7 @@ LL | return false; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:44:17 + --> $DIR/needless_return.rs:54:17 | LL | true => return false, | ^^^^^^^^^^^^ @@ -40,7 +56,7 @@ LL | true => return false, = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:46:13 + --> $DIR/needless_return.rs:56:13 | LL | return true; | ^^^^^^^^^^^ @@ -48,7 +64,7 @@ LL | return true; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:53:9 + --> $DIR/needless_return.rs:63:9 | LL | return true; | ^^^^^^^^^^^ @@ -56,7 +72,7 @@ LL | return true; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:55:16 + --> $DIR/needless_return.rs:65:16 | LL | let _ = || return true; | ^^^^^^^^^^^ @@ -64,7 +80,7 @@ LL | let _ = || return true; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:59:5 + --> $DIR/needless_return.rs:69:5 | LL | return the_answer!(); | ^^^^^^^^^^^^^^^^^^^^ @@ -72,7 +88,7 @@ LL | return the_answer!(); = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:62:21 + --> $DIR/needless_return.rs:72:21 | LL | fn test_void_fun() { | _____________________^ @@ -82,7 +98,7 @@ LL | | return; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:67:11 + --> $DIR/needless_return.rs:77:11 | LL | if b { | ___________^ @@ -92,7 +108,7 @@ LL | | return; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:69:13 + --> $DIR/needless_return.rs:79:13 | LL | } else { | _____________^ @@ -102,7 +118,7 @@ LL | | return; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:77:14 + --> $DIR/needless_return.rs:87:14 | LL | _ => return, | ^^^^^^ @@ -110,7 +126,7 @@ LL | _ => return, = help: replace `return` with a unit value error: unneeded `return` statement - --> $DIR/needless_return.rs:85:24 + --> $DIR/needless_return.rs:95:24 | LL | let _ = 42; | ________________________^ @@ -120,7 +136,7 @@ LL | | return; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:88:14 + --> $DIR/needless_return.rs:98:14 | LL | _ => return, | ^^^^^^ @@ -128,7 +144,7 @@ LL | _ => return, = help: replace `return` with a unit value error: unneeded `return` statement - --> $DIR/needless_return.rs:101:9 + --> $DIR/needless_return.rs:111:9 | LL | return String::from("test"); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -136,7 +152,7 @@ LL | return String::from("test"); = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:103:9 + --> $DIR/needless_return.rs:113:9 | LL | return String::new(); | ^^^^^^^^^^^^^^^^^^^^ @@ -144,7 +160,7 @@ LL | return String::new(); = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:125:32 + --> $DIR/needless_return.rs:135:32 | LL | bar.unwrap_or_else(|_| return) | ^^^^^^ @@ -152,7 +168,7 @@ LL | bar.unwrap_or_else(|_| return) = help: replace `return` with an empty block error: unneeded `return` statement - --> $DIR/needless_return.rs:129:21 + --> $DIR/needless_return.rs:139:21 | LL | let _ = || { | _____________________^ @@ -162,7 +178,7 @@ LL | | return; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:132:20 + --> $DIR/needless_return.rs:142:20 | LL | let _ = || return; | ^^^^^^ @@ -170,7 +186,7 @@ LL | let _ = || return; = help: replace `return` with an empty block error: unneeded `return` statement - --> $DIR/needless_return.rs:138:32 + --> $DIR/needless_return.rs:148:32 | LL | res.unwrap_or_else(|_| return Foo) | ^^^^^^^^^^ @@ -178,7 +194,7 @@ LL | res.unwrap_or_else(|_| return Foo) = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:147:5 + --> $DIR/needless_return.rs:157:5 | LL | return true; | ^^^^^^^^^^^ @@ -186,7 +202,7 @@ LL | return true; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:151:5 + --> $DIR/needless_return.rs:161:5 | LL | return true; | ^^^^^^^^^^^ @@ -194,7 +210,7 @@ LL | return true; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:156:9 + --> $DIR/needless_return.rs:166:9 | LL | return true; | ^^^^^^^^^^^ @@ -202,7 +218,7 @@ LL | return true; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:158:9 + --> $DIR/needless_return.rs:168:9 | LL | return false; | ^^^^^^^^^^^^ @@ -210,7 +226,7 @@ LL | return false; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:164:17 + --> $DIR/needless_return.rs:174:17 | LL | true => return false, | ^^^^^^^^^^^^ @@ -218,7 +234,7 @@ LL | true => return false, = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:166:13 + --> $DIR/needless_return.rs:176:13 | LL | return true; | ^^^^^^^^^^^ @@ -226,7 +242,7 @@ LL | return true; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:173:9 + --> $DIR/needless_return.rs:183:9 | LL | return true; | ^^^^^^^^^^^ @@ -234,7 +250,7 @@ LL | return true; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:175:16 + --> $DIR/needless_return.rs:185:16 | LL | let _ = || return true; | ^^^^^^^^^^^ @@ -242,7 +258,7 @@ LL | let _ = || return true; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:179:5 + --> $DIR/needless_return.rs:189:5 | LL | return the_answer!(); | ^^^^^^^^^^^^^^^^^^^^ @@ -250,7 +266,7 @@ LL | return the_answer!(); = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:182:33 + --> $DIR/needless_return.rs:192:33 | LL | async fn async_test_void_fun() { | _________________________________^ @@ -260,7 +276,7 @@ LL | | return; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:187:11 + --> $DIR/needless_return.rs:197:11 | LL | if b { | ___________^ @@ -270,7 +286,7 @@ LL | | return; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:189:13 + --> $DIR/needless_return.rs:199:13 | LL | } else { | _____________^ @@ -280,7 +296,7 @@ LL | | return; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:197:14 + --> $DIR/needless_return.rs:207:14 | LL | _ => return, | ^^^^^^ @@ -288,7 +304,7 @@ LL | _ => return, = help: replace `return` with a unit value error: unneeded `return` statement - --> $DIR/needless_return.rs:210:9 + --> $DIR/needless_return.rs:220:9 | LL | return String::from("test"); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -296,7 +312,7 @@ LL | return String::from("test"); = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:212:9 + --> $DIR/needless_return.rs:222:9 | LL | return String::new(); | ^^^^^^^^^^^^^^^^^^^^ @@ -304,7 +320,7 @@ LL | return String::new(); = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:228:5 + --> $DIR/needless_return.rs:238:5 | LL | return format!("Hello {}", "world!"); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -312,7 +328,7 @@ LL | return format!("Hello {}", "world!"); = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:239:9 + --> $DIR/needless_return.rs:249:9 | LL | return true; | ^^^^^^^^^^^ @@ -320,7 +336,7 @@ LL | return true; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:241:9 + --> $DIR/needless_return.rs:251:9 | LL | return false; | ^^^^^^^^^^^^ @@ -328,7 +344,7 @@ LL | return false; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:248:13 + --> $DIR/needless_return.rs:258:13 | LL | return 10; | ^^^^^^^^^ @@ -336,7 +352,7 @@ LL | return 10; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:251:13 + --> $DIR/needless_return.rs:261:13 | LL | return 100; | ^^^^^^^^^^ @@ -344,7 +360,7 @@ LL | return 100; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:259:9 + --> $DIR/needless_return.rs:269:9 | LL | return 0; | ^^^^^^^^ @@ -352,7 +368,7 @@ LL | return 0; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:266:13 + --> $DIR/needless_return.rs:276:13 | LL | return *(x as *const isize); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -360,7 +376,7 @@ LL | return *(x as *const isize); = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:268:13 + --> $DIR/needless_return.rs:278:13 | LL | return !*(x as *const isize); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -368,7 +384,7 @@ LL | return !*(x as *const isize); = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:275:20 + --> $DIR/needless_return.rs:285:20 | LL | let _ = 42; | ____________________^ @@ -379,7 +395,7 @@ LL | | return; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:282:20 + --> $DIR/needless_return.rs:292:20 | LL | let _ = 42; return; | ^^^^^^^ @@ -387,7 +403,7 @@ LL | let _ = 42; return; = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:294:9 + --> $DIR/needless_return.rs:304:9 | LL | return Ok(format!("ok!")); | ^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -395,12 +411,28 @@ LL | return Ok(format!("ok!")); = help: remove `return` error: unneeded `return` statement - --> $DIR/needless_return.rs:296:9 + --> $DIR/needless_return.rs:306:9 | LL | return Err(format!("err!")); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = help: remove `return` -error: aborting due to 48 previous errors +error: unneeded `return` statement + --> $DIR/needless_return.rs:312:9 + | +LL | return if true { 1 } else { 2 }; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = help: remove `return` + +error: unneeded `return` statement + --> $DIR/needless_return.rs:316:9 + | +LL | return if b1 { 0 } else { 1 } | if b2 { 2 } else { 3 } | if b3 { 4 } else { 5 }; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = help: remove `return` and wrap the sequence with parentheses + +error: aborting due to 52 previous errors diff --git a/src/tools/clippy/tests/ui/never_loop.rs b/src/tools/clippy/tests/ui/never_loop.rs index 28e8f459d..29821ff96 100644 --- a/src/tools/clippy/tests/ui/never_loop.rs +++ b/src/tools/clippy/tests/ui/never_loop.rs @@ -250,6 +250,51 @@ pub fn test20() { } } +pub fn test21() { + loop { + 'a: { + {} + break 'a; + } + } +} + +// Issue 10304: code after break from block was not considered +// unreachable code and was considered for further analysis of +// whether the loop would ever be executed or not. +pub fn test22() { + for _ in 0..10 { + 'block: { + break 'block; + return; + } + println!("looped"); + } +} + +pub fn test23() { + for _ in 0..10 { + 'block: { + for _ in 0..20 { + break 'block; + } + } + println!("looped"); + } +} + +pub fn test24() { + 'a: for _ in 0..10 { + 'b: { + let x = Some(1); + match x { + None => break 'a, + Some(_) => break 'b, + } + } + } +} + fn main() { test1(); test2(); diff --git a/src/tools/clippy/tests/ui/never_loop.stderr b/src/tools/clippy/tests/ui/never_loop.stderr index b7029bf8b..704d44864 100644 --- a/src/tools/clippy/tests/ui/never_loop.stderr +++ b/src/tools/clippy/tests/ui/never_loop.stderr @@ -126,5 +126,18 @@ LL | | } LL | | } | |_____^ -error: aborting due to 11 previous errors +error: this loop never actually loops + --> $DIR/never_loop.rs:278:13 + | +LL | / for _ in 0..20 { +LL | | break 'block; +LL | | } + | |_____________^ + | +help: if you need the first element of the iterator, try writing + | +LL | if let Some(_) = (0..20).next() { + | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +error: aborting due to 12 previous errors diff --git a/src/tools/clippy/tests/ui/new_without_default.rs b/src/tools/clippy/tests/ui/new_without_default.rs index 65809023f..7803418cb 100644 --- a/src/tools/clippy/tests/ui/new_without_default.rs +++ b/src/tools/clippy/tests/ui/new_without_default.rs @@ -1,4 +1,9 @@ -#![allow(dead_code, clippy::missing_safety_doc, clippy::extra_unused_lifetimes)] +#![allow( + dead_code, + clippy::missing_safety_doc, + clippy::extra_unused_lifetimes, + clippy::extra_unused_type_parameters +)] #![warn(clippy::new_without_default)] pub struct Foo; diff --git a/src/tools/clippy/tests/ui/new_without_default.stderr b/src/tools/clippy/tests/ui/new_without_default.stderr index 212a69ab9..583dd327d 100644 --- a/src/tools/clippy/tests/ui/new_without_default.stderr +++ b/src/tools/clippy/tests/ui/new_without_default.stderr @@ -1,5 +1,5 @@ error: you should consider adding a `Default` implementation for `Foo` - --> $DIR/new_without_default.rs:7:5 + --> $DIR/new_without_default.rs:12:5 | LL | / pub fn new() -> Foo { LL | | Foo @@ -17,7 +17,7 @@ LL + } | error: you should consider adding a `Default` implementation for `Bar` - --> $DIR/new_without_default.rs:15:5 + --> $DIR/new_without_default.rs:20:5 | LL | / pub fn new() -> Self { LL | | Bar @@ -34,7 +34,7 @@ LL + } | error: you should consider adding a `Default` implementation for `LtKo<'c>` - --> $DIR/new_without_default.rs:79:5 + --> $DIR/new_without_default.rs:84:5 | LL | / pub fn new() -> LtKo<'c> { LL | | unimplemented!() @@ -51,7 +51,7 @@ LL + } | error: you should consider adding a `Default` implementation for `NewNotEqualToDerive` - --> $DIR/new_without_default.rs:172:5 + --> $DIR/new_without_default.rs:177:5 | LL | / pub fn new() -> Self { LL | | NewNotEqualToDerive { foo: 1 } @@ -68,7 +68,7 @@ LL + } | error: you should consider adding a `Default` implementation for `FooGenerics<T>` - --> $DIR/new_without_default.rs:180:5 + --> $DIR/new_without_default.rs:185:5 | LL | / pub fn new() -> Self { LL | | Self(Default::default()) @@ -85,7 +85,7 @@ LL + } | error: you should consider adding a `Default` implementation for `BarGenerics<T>` - --> $DIR/new_without_default.rs:187:5 + --> $DIR/new_without_default.rs:192:5 | LL | / pub fn new() -> Self { LL | | Self(Default::default()) @@ -102,7 +102,7 @@ LL + } | error: you should consider adding a `Default` implementation for `Foo<T>` - --> $DIR/new_without_default.rs:198:9 + --> $DIR/new_without_default.rs:203:9 | LL | / pub fn new() -> Self { LL | | todo!() diff --git a/src/tools/clippy/tests/ui/no_mangle_with_rust_abi.fixed b/src/tools/clippy/tests/ui/no_mangle_with_rust_abi.fixed new file mode 100644 index 000000000..d18dec22a --- /dev/null +++ b/src/tools/clippy/tests/ui/no_mangle_with_rust_abi.fixed @@ -0,0 +1,48 @@ +// run-rustfix + +#![allow(unused)] +#![warn(clippy::no_mangle_with_rust_abi)] + +#[no_mangle] +extern "C" fn rust_abi_fn_one(arg_one: u32, arg_two: usize) {} + +#[no_mangle] +pub extern "C" fn rust_abi_fn_two(arg_one: u32, arg_two: usize) {} + +/// # Safety +/// This function shouldn't be called unless the horsemen are ready +#[no_mangle] +pub unsafe extern "C" fn rust_abi_fn_three(arg_one: u32, arg_two: usize) {} + +/// # Safety +/// This function shouldn't be called unless the horsemen are ready +#[no_mangle] +unsafe extern "C" fn rust_abi_fn_four(arg_one: u32, arg_two: usize) {} + +#[no_mangle] +extern "C" fn rust_abi_multiline_function_really_long_name_to_overflow_args_to_multiple_lines( + arg_one: u32, + arg_two: usize, +) -> u32 { + 0 +} + +// Must not run on functions that explicitly opt in to Rust ABI with `extern "Rust"` +#[no_mangle] +#[rustfmt::skip] +extern "Rust" fn rust_abi_fn_explicit_opt_in(arg_one: u32, arg_two: usize) {} + +fn rust_abi_fn_again(arg_one: u32, arg_two: usize) {} + +#[no_mangle] +extern "C" fn c_abi_fn(arg_one: u32, arg_two: usize) {} + +extern "C" fn c_abi_fn_again(arg_one: u32, arg_two: usize) {} + +extern "C" { + fn c_abi_in_block(arg_one: u32, arg_two: usize); +} + +fn main() { + // test code goes here +} diff --git a/src/tools/clippy/tests/ui/no_mangle_with_rust_abi.rs b/src/tools/clippy/tests/ui/no_mangle_with_rust_abi.rs new file mode 100644 index 000000000..481e1b6d9 --- /dev/null +++ b/src/tools/clippy/tests/ui/no_mangle_with_rust_abi.rs @@ -0,0 +1,48 @@ +// run-rustfix + +#![allow(unused)] +#![warn(clippy::no_mangle_with_rust_abi)] + +#[no_mangle] +fn rust_abi_fn_one(arg_one: u32, arg_two: usize) {} + +#[no_mangle] +pub fn rust_abi_fn_two(arg_one: u32, arg_two: usize) {} + +/// # Safety +/// This function shouldn't be called unless the horsemen are ready +#[no_mangle] +pub unsafe fn rust_abi_fn_three(arg_one: u32, arg_two: usize) {} + +/// # Safety +/// This function shouldn't be called unless the horsemen are ready +#[no_mangle] +unsafe fn rust_abi_fn_four(arg_one: u32, arg_two: usize) {} + +#[no_mangle] +fn rust_abi_multiline_function_really_long_name_to_overflow_args_to_multiple_lines( + arg_one: u32, + arg_two: usize, +) -> u32 { + 0 +} + +// Must not run on functions that explicitly opt in to Rust ABI with `extern "Rust"` +#[no_mangle] +#[rustfmt::skip] +extern "Rust" fn rust_abi_fn_explicit_opt_in(arg_one: u32, arg_two: usize) {} + +fn rust_abi_fn_again(arg_one: u32, arg_two: usize) {} + +#[no_mangle] +extern "C" fn c_abi_fn(arg_one: u32, arg_two: usize) {} + +extern "C" fn c_abi_fn_again(arg_one: u32, arg_two: usize) {} + +extern "C" { + fn c_abi_in_block(arg_one: u32, arg_two: usize); +} + +fn main() { + // test code goes here +} diff --git a/src/tools/clippy/tests/ui/no_mangle_with_rust_abi.stderr b/src/tools/clippy/tests/ui/no_mangle_with_rust_abi.stderr new file mode 100644 index 000000000..71517d318 --- /dev/null +++ b/src/tools/clippy/tests/ui/no_mangle_with_rust_abi.stderr @@ -0,0 +1,45 @@ +error: attribute #[no_mangle] set on a Rust ABI function + --> $DIR/no_mangle_with_rust_abi.rs:7:1 + | +LL | fn rust_abi_fn_one(arg_one: u32, arg_two: usize) {} + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `extern "C" fn rust_abi_fn_one(arg_one: u32, arg_two: usize)` + | + = note: `-D clippy::no-mangle-with-rust-abi` implied by `-D warnings` + +error: attribute #[no_mangle] set on a Rust ABI function + --> $DIR/no_mangle_with_rust_abi.rs:10:1 + | +LL | pub fn rust_abi_fn_two(arg_one: u32, arg_two: usize) {} + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `pub extern "C" fn rust_abi_fn_two(arg_one: u32, arg_two: usize)` + +error: attribute #[no_mangle] set on a Rust ABI function + --> $DIR/no_mangle_with_rust_abi.rs:15:1 + | +LL | pub unsafe fn rust_abi_fn_three(arg_one: u32, arg_two: usize) {} + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `pub unsafe extern "C" fn rust_abi_fn_three(arg_one: u32, arg_two: usize)` + +error: attribute #[no_mangle] set on a Rust ABI function + --> $DIR/no_mangle_with_rust_abi.rs:20:1 + | +LL | unsafe fn rust_abi_fn_four(arg_one: u32, arg_two: usize) {} + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `unsafe extern "C" fn rust_abi_fn_four(arg_one: u32, arg_two: usize)` + +error: attribute #[no_mangle] set on a Rust ABI function + --> $DIR/no_mangle_with_rust_abi.rs:23:1 + | +LL | / fn rust_abi_multiline_function_really_long_name_to_overflow_args_to_multiple_lines( +LL | | arg_one: u32, +LL | | arg_two: usize, +LL | | ) -> u32 { + | |________^ + | +help: try + | +LL + extern "C" fn rust_abi_multiline_function_really_long_name_to_overflow_args_to_multiple_lines( +LL + arg_one: u32, +LL + arg_two: usize, +LL ~ ) -> u32 { + | + +error: aborting due to 5 previous errors + diff --git a/src/tools/clippy/tests/ui/question_mark_used.rs b/src/tools/clippy/tests/ui/question_mark_used.rs new file mode 100644 index 000000000..8c3ef7896 --- /dev/null +++ b/src/tools/clippy/tests/ui/question_mark_used.rs @@ -0,0 +1,15 @@ +// non rustfixable +#![allow(unreachable_code)] +#![allow(dead_code)] +#![warn(clippy::question_mark_used)] + +fn other_function() -> Option<i32> { + Some(32) +} + +fn my_function() -> Option<i32> { + other_function()?; + None +} + +fn main() {} diff --git a/src/tools/clippy/tests/ui/question_mark_used.stderr b/src/tools/clippy/tests/ui/question_mark_used.stderr new file mode 100644 index 000000000..8b5fcbcdb --- /dev/null +++ b/src/tools/clippy/tests/ui/question_mark_used.stderr @@ -0,0 +1,11 @@ +error: question mark operator was used + --> $DIR/question_mark_used.rs:11:5 + | +LL | other_function()?; + | ^^^^^^^^^^^^^^^^^ + | + = help: consider using a custom macro or match expression + = note: `-D clippy::question-mark-used` implied by `-D warnings` + +error: aborting due to previous error + diff --git a/src/tools/clippy/tests/ui/redundant_field_names.fixed b/src/tools/clippy/tests/ui/redundant_field_names.fixed index ec7f8ae92..276266a2d 100644 --- a/src/tools/clippy/tests/ui/redundant_field_names.fixed +++ b/src/tools/clippy/tests/ui/redundant_field_names.fixed @@ -1,7 +1,7 @@ // run-rustfix #![warn(clippy::redundant_field_names)] -#![allow(clippy::no_effect, dead_code, unused_variables)] +#![allow(clippy::extra_unused_type_parameters, clippy::no_effect, dead_code, unused_variables)] #[macro_use] extern crate derive_new; diff --git a/src/tools/clippy/tests/ui/redundant_field_names.rs b/src/tools/clippy/tests/ui/redundant_field_names.rs index 73122016c..f674141c1 100644 --- a/src/tools/clippy/tests/ui/redundant_field_names.rs +++ b/src/tools/clippy/tests/ui/redundant_field_names.rs @@ -1,7 +1,7 @@ // run-rustfix #![warn(clippy::redundant_field_names)] -#![allow(clippy::no_effect, dead_code, unused_variables)] +#![allow(clippy::extra_unused_type_parameters, clippy::no_effect, dead_code, unused_variables)] #[macro_use] extern crate derive_new; diff --git a/src/tools/clippy/tests/ui/regex.rs b/src/tools/clippy/tests/ui/regex.rs index f0e1a8128..ab8ac97a0 100644 --- a/src/tools/clippy/tests/ui/regex.rs +++ b/src/tools/clippy/tests/ui/regex.rs @@ -36,6 +36,10 @@ fn syntax_error() { let raw_string_error = Regex::new(r"[...\/...]"); let raw_string_error = Regex::new(r#"[...\/...]"#); + + let escaped_string_span = Regex::new("\\b\\c"); + + let aux_span = Regex::new("(?ixi)"); } fn trivial_regex() { diff --git a/src/tools/clippy/tests/ui/regex.stderr b/src/tools/clippy/tests/ui/regex.stderr index 2424644c6..c2440f39e 100644 --- a/src/tools/clippy/tests/ui/regex.stderr +++ b/src/tools/clippy/tests/ui/regex.stderr @@ -29,7 +29,10 @@ error: regex syntax error: invalid character class range, the start must be <= t LL | let some_unicode = Regex::new("[é-è]"); | ^^^ -error: regex syntax error on position 0: unclosed group +error: regex parse error: + ( + ^ + error: unclosed group --> $DIR/regex.rs:18:33 | LL | let some_regex = Regex::new(OPENING_PAREN); @@ -43,25 +46,37 @@ LL | let binary_pipe_in_wrong_position = BRegex::new("|"); | = help: the regex is unlikely to be useful as it is -error: regex syntax error on position 0: unclosed group +error: regex parse error: + ( + ^ + error: unclosed group --> $DIR/regex.rs:21:41 | LL | let some_binary_regex = BRegex::new(OPENING_PAREN); | ^^^^^^^^^^^^^ -error: regex syntax error on position 0: unclosed group +error: regex parse error: + ( + ^ + error: unclosed group --> $DIR/regex.rs:22:56 | LL | let some_binary_regex_builder = BRegexBuilder::new(OPENING_PAREN); | ^^^^^^^^^^^^^ -error: regex syntax error on position 0: unclosed group +error: regex parse error: + ( + ^ + error: unclosed group --> $DIR/regex.rs:34:37 | LL | let set_error = RegexSet::new(&[OPENING_PAREN, r"[a-z]+/.(com|org|net)"]); | ^^^^^^^^^^^^^ -error: regex syntax error on position 0: unclosed group +error: regex parse error: + ( + ^ + error: unclosed group --> $DIR/regex.rs:35:39 | LL | let bset_error = BRegexSet::new(&[OPENING_PAREN, r"[a-z]+/.(com|org|net)"]); @@ -79,8 +94,25 @@ error: regex syntax error: unrecognized escape sequence LL | let raw_string_error = Regex::new(r#"[...//...]"#); | ^^ +error: regex parse error: + /b/c + ^^ + error: unrecognized escape sequence + --> $DIR/regex.rs:40:42 + | +LL | let escaped_string_span = Regex::new("/b/c"); + | ^^^^^^^^ + | + = help: consider using a raw string literal: `r".."` + +error: regex syntax error: duplicate flag + --> $DIR/regex.rs:42:34 + | +LL | let aux_span = Regex::new("(?ixi)"); + | ^ ^ + error: trivial regex - --> $DIR/regex.rs:42:33 + --> $DIR/regex.rs:46:33 | LL | let trivial_eq = Regex::new("^foobar$"); | ^^^^^^^^^^ @@ -88,7 +120,7 @@ LL | let trivial_eq = Regex::new("^foobar$"); = help: consider using `==` on `str`s error: trivial regex - --> $DIR/regex.rs:44:48 + --> $DIR/regex.rs:48:48 | LL | let trivial_eq_builder = RegexBuilder::new("^foobar$"); | ^^^^^^^^^^ @@ -96,7 +128,7 @@ LL | let trivial_eq_builder = RegexBuilder::new("^foobar$"); = help: consider using `==` on `str`s error: trivial regex - --> $DIR/regex.rs:46:42 + --> $DIR/regex.rs:50:42 | LL | let trivial_starts_with = Regex::new("^foobar"); | ^^^^^^^^^ @@ -104,7 +136,7 @@ LL | let trivial_starts_with = Regex::new("^foobar"); = help: consider using `str::starts_with` error: trivial regex - --> $DIR/regex.rs:48:40 + --> $DIR/regex.rs:52:40 | LL | let trivial_ends_with = Regex::new("foobar$"); | ^^^^^^^^^ @@ -112,7 +144,7 @@ LL | let trivial_ends_with = Regex::new("foobar$"); = help: consider using `str::ends_with` error: trivial regex - --> $DIR/regex.rs:50:39 + --> $DIR/regex.rs:54:39 | LL | let trivial_contains = Regex::new("foobar"); | ^^^^^^^^ @@ -120,7 +152,7 @@ LL | let trivial_contains = Regex::new("foobar"); = help: consider using `str::contains` error: trivial regex - --> $DIR/regex.rs:52:39 + --> $DIR/regex.rs:56:39 | LL | let trivial_contains = Regex::new(NOT_A_REAL_REGEX); | ^^^^^^^^^^^^^^^^ @@ -128,7 +160,7 @@ LL | let trivial_contains = Regex::new(NOT_A_REAL_REGEX); = help: consider using `str::contains` error: trivial regex - --> $DIR/regex.rs:54:40 + --> $DIR/regex.rs:58:40 | LL | let trivial_backslash = Regex::new("a/.b"); | ^^^^^^^ @@ -136,7 +168,7 @@ LL | let trivial_backslash = Regex::new("a/.b"); = help: consider using `str::contains` error: trivial regex - --> $DIR/regex.rs:57:36 + --> $DIR/regex.rs:61:36 | LL | let trivial_empty = Regex::new(""); | ^^ @@ -144,7 +176,7 @@ LL | let trivial_empty = Regex::new(""); = help: the regex is unlikely to be useful as it is error: trivial regex - --> $DIR/regex.rs:59:36 + --> $DIR/regex.rs:63:36 | LL | let trivial_empty = Regex::new("^"); | ^^^ @@ -152,7 +184,7 @@ LL | let trivial_empty = Regex::new("^"); = help: the regex is unlikely to be useful as it is error: trivial regex - --> $DIR/regex.rs:61:36 + --> $DIR/regex.rs:65:36 | LL | let trivial_empty = Regex::new("^$"); | ^^^^ @@ -160,12 +192,12 @@ LL | let trivial_empty = Regex::new("^$"); = help: consider using `str::is_empty` error: trivial regex - --> $DIR/regex.rs:63:44 + --> $DIR/regex.rs:67:44 | LL | let binary_trivial_empty = BRegex::new("^$"); | ^^^^ | = help: consider using `str::is_empty` -error: aborting due to 23 previous errors +error: aborting due to 25 previous errors diff --git a/src/tools/clippy/tests/ui/seek_to_start_instead_of_rewind.fixed b/src/tools/clippy/tests/ui/seek_to_start_instead_of_rewind.fixed index 713cff604..dc24d447c 100644 --- a/src/tools/clippy/tests/ui/seek_to_start_instead_of_rewind.fixed +++ b/src/tools/clippy/tests/ui/seek_to_start_instead_of_rewind.fixed @@ -26,7 +26,7 @@ fn seek_to_start_false_method(t: &mut StructWithSeekMethod) { // This should NOT trigger clippy warning because // StructWithSeekMethod does not implement std::io::Seek; -fn seek_to_start_method_owned_false<T>(mut t: StructWithSeekMethod) { +fn seek_to_start_method_owned_false(mut t: StructWithSeekMethod) { t.seek(SeekFrom::Start(0)); } @@ -38,7 +38,7 @@ fn seek_to_start_false_trait(t: &mut StructWithSeekTrait) { // This should NOT trigger clippy warning because // StructWithSeekMethod does not implement std::io::Seek; -fn seek_to_start_false_trait_owned<T>(mut t: StructWithSeekTrait) { +fn seek_to_start_false_trait_owned(mut t: StructWithSeekTrait) { t.seek(SeekFrom::Start(0)); } diff --git a/src/tools/clippy/tests/ui/seek_to_start_instead_of_rewind.rs b/src/tools/clippy/tests/ui/seek_to_start_instead_of_rewind.rs index 467003a1a..4adde2c40 100644 --- a/src/tools/clippy/tests/ui/seek_to_start_instead_of_rewind.rs +++ b/src/tools/clippy/tests/ui/seek_to_start_instead_of_rewind.rs @@ -26,7 +26,7 @@ fn seek_to_start_false_method(t: &mut StructWithSeekMethod) { // This should NOT trigger clippy warning because // StructWithSeekMethod does not implement std::io::Seek; -fn seek_to_start_method_owned_false<T>(mut t: StructWithSeekMethod) { +fn seek_to_start_method_owned_false(mut t: StructWithSeekMethod) { t.seek(SeekFrom::Start(0)); } @@ -38,7 +38,7 @@ fn seek_to_start_false_trait(t: &mut StructWithSeekTrait) { // This should NOT trigger clippy warning because // StructWithSeekMethod does not implement std::io::Seek; -fn seek_to_start_false_trait_owned<T>(mut t: StructWithSeekTrait) { +fn seek_to_start_false_trait_owned(mut t: StructWithSeekTrait) { t.seek(SeekFrom::Start(0)); } diff --git a/src/tools/clippy/tests/ui/significant_drop_tightening.fixed b/src/tools/clippy/tests/ui/significant_drop_tightening.fixed new file mode 100644 index 000000000..da998c610 --- /dev/null +++ b/src/tools/clippy/tests/ui/significant_drop_tightening.fixed @@ -0,0 +1,84 @@ +// run-rustfix + +#![warn(clippy::significant_drop_tightening)] + +use std::sync::Mutex; + +pub fn complex_return_triggers_the_lint() -> i32 { + fn foo() -> i32 { + 1 + } + let mutex = Mutex::new(1); + let lock = mutex.lock().unwrap(); + let _ = *lock; + let _ = *lock; + drop(lock); + foo() +} + +pub fn path_return_can_be_ignored() -> i32 { + let mutex = Mutex::new(1); + let lock = mutex.lock().unwrap(); + let rslt = *lock; + let _ = *lock; + rslt +} + +pub fn post_bindings_can_be_ignored() { + let mutex = Mutex::new(1); + let lock = mutex.lock().unwrap(); + let rslt = *lock; + let another = rslt; + let _ = another; +} + +pub fn unnecessary_contention_with_multiple_owned_results() { + { + let mutex = Mutex::new(1i32); + let lock = mutex.lock().unwrap(); + let _ = lock.abs(); + let _ = lock.is_positive(); + } + + { + let mutex = Mutex::new(1i32); + let lock = mutex.lock().unwrap(); + let rslt0 = lock.abs(); + let rslt1 = lock.is_positive(); + drop(lock); + do_heavy_computation_that_takes_time((rslt0, rslt1)); + } +} + +pub fn unnecessary_contention_with_single_owned_results() { + { + let mutex = Mutex::new(1i32); + let lock = mutex.lock().unwrap(); + let _ = lock.abs(); + } + { + let mutex = Mutex::new(vec![1i32]); + let mut lock = mutex.lock().unwrap(); + lock.clear(); + } + + { + let mutex = Mutex::new(1i32); + + let rslt0 = mutex.lock().unwrap().abs(); + + do_heavy_computation_that_takes_time(rslt0); + } + { + let mutex = Mutex::new(vec![1i32]); + + mutex.lock().unwrap().clear(); + + do_heavy_computation_that_takes_time(()); + } +} + +// Marker used for illustration purposes. +pub fn do_heavy_computation_that_takes_time<T>(_: T) {} + +fn main() {} diff --git a/src/tools/clippy/tests/ui/significant_drop_tightening.rs b/src/tools/clippy/tests/ui/significant_drop_tightening.rs new file mode 100644 index 000000000..83823f95f --- /dev/null +++ b/src/tools/clippy/tests/ui/significant_drop_tightening.rs @@ -0,0 +1,80 @@ +// run-rustfix + +#![warn(clippy::significant_drop_tightening)] + +use std::sync::Mutex; + +pub fn complex_return_triggers_the_lint() -> i32 { + fn foo() -> i32 { + 1 + } + let mutex = Mutex::new(1); + let lock = mutex.lock().unwrap(); + let _ = *lock; + let _ = *lock; + foo() +} + +pub fn path_return_can_be_ignored() -> i32 { + let mutex = Mutex::new(1); + let lock = mutex.lock().unwrap(); + let rslt = *lock; + let _ = *lock; + rslt +} + +pub fn post_bindings_can_be_ignored() { + let mutex = Mutex::new(1); + let lock = mutex.lock().unwrap(); + let rslt = *lock; + let another = rslt; + let _ = another; +} + +pub fn unnecessary_contention_with_multiple_owned_results() { + { + let mutex = Mutex::new(1i32); + let lock = mutex.lock().unwrap(); + let _ = lock.abs(); + let _ = lock.is_positive(); + } + + { + let mutex = Mutex::new(1i32); + let lock = mutex.lock().unwrap(); + let rslt0 = lock.abs(); + let rslt1 = lock.is_positive(); + do_heavy_computation_that_takes_time((rslt0, rslt1)); + } +} + +pub fn unnecessary_contention_with_single_owned_results() { + { + let mutex = Mutex::new(1i32); + let lock = mutex.lock().unwrap(); + let _ = lock.abs(); + } + { + let mutex = Mutex::new(vec![1i32]); + let mut lock = mutex.lock().unwrap(); + lock.clear(); + } + + { + let mutex = Mutex::new(1i32); + let lock = mutex.lock().unwrap(); + let rslt0 = lock.abs(); + do_heavy_computation_that_takes_time(rslt0); + } + { + let mutex = Mutex::new(vec![1i32]); + let mut lock = mutex.lock().unwrap(); + lock.clear(); + do_heavy_computation_that_takes_time(()); + } +} + +// Marker used for illustration purposes. +pub fn do_heavy_computation_that_takes_time<T>(_: T) {} + +fn main() {} diff --git a/src/tools/clippy/tests/ui/significant_drop_tightening.stderr b/src/tools/clippy/tests/ui/significant_drop_tightening.stderr new file mode 100644 index 000000000..ab8ce356e --- /dev/null +++ b/src/tools/clippy/tests/ui/significant_drop_tightening.stderr @@ -0,0 +1,94 @@ +error: temporary with significant `Drop` can be early dropped + --> $DIR/significant_drop_tightening.rs:12:9 + | +LL | pub fn complex_return_triggers_the_lint() -> i32 { + | __________________________________________________- +LL | | fn foo() -> i32 { +LL | | 1 +LL | | } +LL | | let mutex = Mutex::new(1); +LL | | let lock = mutex.lock().unwrap(); + | | ^^^^ +... | +LL | | foo() +LL | | } + | |_- temporary `lock` is currently being dropped at the end of its contained scope + | + = note: this might lead to unnecessary resource contention + = note: `-D clippy::significant-drop-tightening` implied by `-D warnings` +help: drop the temporary after the end of its last usage + | +LL ~ let _ = *lock; +LL + drop(lock); + | + +error: temporary with significant `Drop` can be early dropped + --> $DIR/significant_drop_tightening.rs:44:13 + | +LL | / { +LL | | let mutex = Mutex::new(1i32); +LL | | let lock = mutex.lock().unwrap(); + | | ^^^^ +LL | | let rslt0 = lock.abs(); +LL | | let rslt1 = lock.is_positive(); +LL | | do_heavy_computation_that_takes_time((rslt0, rslt1)); +LL | | } + | |_____- temporary `lock` is currently being dropped at the end of its contained scope + | + = note: this might lead to unnecessary resource contention +help: drop the temporary after the end of its last usage + | +LL ~ let rslt1 = lock.is_positive(); +LL + drop(lock); + | + +error: temporary with significant `Drop` can be early dropped + --> $DIR/significant_drop_tightening.rs:65:13 + | +LL | / { +LL | | let mutex = Mutex::new(1i32); +LL | | let lock = mutex.lock().unwrap(); + | | ^^^^ +LL | | let rslt0 = lock.abs(); +LL | | do_heavy_computation_that_takes_time(rslt0); +LL | | } + | |_____- temporary `lock` is currently being dropped at the end of its contained scope + | + = note: this might lead to unnecessary resource contention +help: merge the temporary construction with its single usage + | +LL ~ +LL + let rslt0 = mutex.lock().unwrap().abs(); + | +help: remove separated single usage + | +LL - let rslt0 = lock.abs(); +LL + + | + +error: temporary with significant `Drop` can be early dropped + --> $DIR/significant_drop_tightening.rs:71:17 + | +LL | / { +LL | | let mutex = Mutex::new(vec![1i32]); +LL | | let mut lock = mutex.lock().unwrap(); + | | ^^^^ +LL | | lock.clear(); +LL | | do_heavy_computation_that_takes_time(()); +LL | | } + | |_____- temporary `lock` is currently being dropped at the end of its contained scope + | + = note: this might lead to unnecessary resource contention +help: merge the temporary construction with its single usage + | +LL ~ +LL + mutex.lock().unwrap().clear(); + | +help: remove separated single usage + | +LL - lock.clear(); +LL + + | + +error: aborting due to 4 previous errors + diff --git a/src/tools/clippy/tests/ui/suspicious_command_arg_space.rs b/src/tools/clippy/tests/ui/suspicious_command_arg_space.rs new file mode 100644 index 000000000..bdc6113a2 --- /dev/null +++ b/src/tools/clippy/tests/ui/suspicious_command_arg_space.rs @@ -0,0 +1,10 @@ +fn main() { + // Things it should warn about: + std::process::Command::new("echo").arg("-n hello").spawn().unwrap(); + std::process::Command::new("cat").arg("--number file").spawn().unwrap(); + + // Things it should not warn about: + std::process::Command::new("echo").arg("hello world").spawn().unwrap(); + std::process::Command::new("a").arg("--fmt=%a %b %c").spawn().unwrap(); + std::process::Command::new("b").arg("-ldflags=-s -w").spawn().unwrap(); +} diff --git a/src/tools/clippy/tests/ui/suspicious_command_arg_space.stderr b/src/tools/clippy/tests/ui/suspicious_command_arg_space.stderr new file mode 100644 index 000000000..9bc0ca93a --- /dev/null +++ b/src/tools/clippy/tests/ui/suspicious_command_arg_space.stderr @@ -0,0 +1,25 @@ +error: single argument that looks like it should be multiple arguments + --> $DIR/suspicious_command_arg_space.rs:3:44 + | +LL | std::process::Command::new("echo").arg("-n hello").spawn().unwrap(); + | ^^^^^^^^^^ + | + = note: `-D clippy::suspicious-command-arg-space` implied by `-D warnings` +help: consider splitting the argument + | +LL | std::process::Command::new("echo").args(["-n", "hello"]).spawn().unwrap(); + | ~~~~ ~~~~~~~~~~~~~~~ + +error: single argument that looks like it should be multiple arguments + --> $DIR/suspicious_command_arg_space.rs:4:43 + | +LL | std::process::Command::new("cat").arg("--number file").spawn().unwrap(); + | ^^^^^^^^^^^^^^^ + | +help: consider splitting the argument + | +LL | std::process::Command::new("cat").args(["--number", "file"]).spawn().unwrap(); + | ~~~~ ~~~~~~~~~~~~~~~~~~~~ + +error: aborting due to 2 previous errors + diff --git a/src/tools/clippy/tests/ui/suspicious_to_owned.stderr b/src/tools/clippy/tests/ui/suspicious_to_owned.stderr index dec3f50d6..c4ec7aa88 100644 --- a/src/tools/clippy/tests/ui/suspicious_to_owned.stderr +++ b/src/tools/clippy/tests/ui/suspicious_to_owned.stderr @@ -2,27 +2,62 @@ error: this `to_owned` call clones the Cow<'_, str> itself and does not cause th --> $DIR/suspicious_to_owned.rs:16:13 | LL | let _ = cow.to_owned(); - | ^^^^^^^^^^^^^^ help: consider using, depending on intent: `cow.clone()` or `cow.into_owned()` + | ^^^^^^^^^^^^^^ | = note: `-D clippy::suspicious-to-owned` implied by `-D warnings` +help: depending on intent, either make the Cow an Owned variant + | +LL | let _ = cow.into_owned(); + | ~~~~~~~~~~~~~~~~ +help: or clone the Cow itself + | +LL | let _ = cow.clone(); + | ~~~~~~~~~~~ error: this `to_owned` call clones the Cow<'_, [char; 3]> itself and does not cause the Cow<'_, [char; 3]> contents to become owned --> $DIR/suspicious_to_owned.rs:26:13 | LL | let _ = cow.to_owned(); - | ^^^^^^^^^^^^^^ help: consider using, depending on intent: `cow.clone()` or `cow.into_owned()` + | ^^^^^^^^^^^^^^ + | +help: depending on intent, either make the Cow an Owned variant + | +LL | let _ = cow.into_owned(); + | ~~~~~~~~~~~~~~~~ +help: or clone the Cow itself + | +LL | let _ = cow.clone(); + | ~~~~~~~~~~~ error: this `to_owned` call clones the Cow<'_, Vec<char>> itself and does not cause the Cow<'_, Vec<char>> contents to become owned --> $DIR/suspicious_to_owned.rs:36:13 | LL | let _ = cow.to_owned(); - | ^^^^^^^^^^^^^^ help: consider using, depending on intent: `cow.clone()` or `cow.into_owned()` + | ^^^^^^^^^^^^^^ + | +help: depending on intent, either make the Cow an Owned variant + | +LL | let _ = cow.into_owned(); + | ~~~~~~~~~~~~~~~~ +help: or clone the Cow itself + | +LL | let _ = cow.clone(); + | ~~~~~~~~~~~ error: this `to_owned` call clones the Cow<'_, str> itself and does not cause the Cow<'_, str> contents to become owned --> $DIR/suspicious_to_owned.rs:46:13 | LL | let _ = cow.to_owned(); - | ^^^^^^^^^^^^^^ help: consider using, depending on intent: `cow.clone()` or `cow.into_owned()` + | ^^^^^^^^^^^^^^ + | +help: depending on intent, either make the Cow an Owned variant + | +LL | let _ = cow.into_owned(); + | ~~~~~~~~~~~~~~~~ +help: or clone the Cow itself + | +LL | let _ = cow.clone(); + | ~~~~~~~~~~~ error: implicitly cloning a `String` by calling `to_owned` on its dereferenced type --> $DIR/suspicious_to_owned.rs:60:13 diff --git a/src/tools/clippy/tests/ui/swap.fixed b/src/tools/clippy/tests/ui/swap.fixed index 805a2ba5a..fa89706a8 100644 --- a/src/tools/clippy/tests/ui/swap.fixed +++ b/src/tools/clippy/tests/ui/swap.fixed @@ -7,7 +7,8 @@ clippy::redundant_clone, redundant_semicolons, dead_code, - unused_assignments + unused_assignments, + unused_variables )] struct Foo(u32); @@ -121,6 +122,27 @@ fn main() { std::mem::swap(&mut c.0, &mut a); ; std::mem::swap(&mut c.0, &mut a); + + std::mem::swap(&mut a, &mut b); + + let mut c = 1; + let mut d = 2; + std::mem::swap(&mut d, &mut c); + + let mut b = 1; + std::mem::swap(&mut a, &mut b); + + let b = 1; + let a = 2; + + let t = b; + let b = a; + let a = t; + + let mut b = 1; + let mut a = 2; + + std::mem::swap(&mut b, &mut a); } fn issue_8154() { diff --git a/src/tools/clippy/tests/ui/swap.rs b/src/tools/clippy/tests/ui/swap.rs index a8c878479..ef8a81c83 100644 --- a/src/tools/clippy/tests/ui/swap.rs +++ b/src/tools/clippy/tests/ui/swap.rs @@ -7,7 +7,8 @@ clippy::redundant_clone, redundant_semicolons, dead_code, - unused_assignments + unused_assignments, + unused_variables )] struct Foo(u32); @@ -143,6 +144,32 @@ fn main() { ; let t = c.0; c.0 = a; a = t; + + let a = b; + let b = a; + + let mut c = 1; + let mut d = 2; + d = c; + c = d; + + let mut b = 1; + let a = b; + b = a; + + let b = 1; + let a = 2; + + let t = b; + let b = a; + let a = t; + + let mut b = 1; + let mut a = 2; + + let t = b; + b = a; + a = t; } fn issue_8154() { diff --git a/src/tools/clippy/tests/ui/swap.stderr b/src/tools/clippy/tests/ui/swap.stderr index ee4b7a508..f0acbfe25 100644 --- a/src/tools/clippy/tests/ui/swap.stderr +++ b/src/tools/clippy/tests/ui/swap.stderr @@ -1,5 +1,5 @@ error: this looks like you are swapping `bar.a` and `bar.b` manually - --> $DIR/swap.rs:24:5 + --> $DIR/swap.rs:25:5 | LL | / let temp = bar.a; LL | | bar.a = bar.b; @@ -10,7 +10,7 @@ LL | | bar.b = temp; = note: `-D clippy::manual-swap` implied by `-D warnings` error: this looks like you are swapping elements of `foo` manually - --> $DIR/swap.rs:36:5 + --> $DIR/swap.rs:37:5 | LL | / let temp = foo[0]; LL | | foo[0] = foo[1]; @@ -18,7 +18,7 @@ LL | | foo[1] = temp; | |_________________^ help: try: `foo.swap(0, 1)` error: this looks like you are swapping elements of `foo` manually - --> $DIR/swap.rs:45:5 + --> $DIR/swap.rs:46:5 | LL | / let temp = foo[0]; LL | | foo[0] = foo[1]; @@ -26,7 +26,7 @@ LL | | foo[1] = temp; | |_________________^ help: try: `foo.swap(0, 1)` error: this looks like you are swapping elements of `foo` manually - --> $DIR/swap.rs:64:5 + --> $DIR/swap.rs:65:5 | LL | / let temp = foo[0]; LL | | foo[0] = foo[1]; @@ -34,7 +34,7 @@ LL | | foo[1] = temp; | |_________________^ help: try: `foo.swap(0, 1)` error: this looks like you are swapping `a` and `b` manually - --> $DIR/swap.rs:75:5 + --> $DIR/swap.rs:76:5 | LL | / a ^= b; LL | | b ^= a; @@ -42,7 +42,7 @@ LL | | a ^= b; | |___________^ help: try: `std::mem::swap(&mut a, &mut b)` error: this looks like you are swapping `bar.a` and `bar.b` manually - --> $DIR/swap.rs:83:5 + --> $DIR/swap.rs:84:5 | LL | / bar.a ^= bar.b; LL | | bar.b ^= bar.a; @@ -50,7 +50,7 @@ LL | | bar.a ^= bar.b; | |___________________^ help: try: `std::mem::swap(&mut bar.a, &mut bar.b)` error: this looks like you are swapping elements of `foo` manually - --> $DIR/swap.rs:91:5 + --> $DIR/swap.rs:92:5 | LL | / foo[0] ^= foo[1]; LL | | foo[1] ^= foo[0]; @@ -58,7 +58,7 @@ LL | | foo[0] ^= foo[1]; | |_____________________^ help: try: `foo.swap(0, 1)` error: this looks like you are swapping `foo[0][1]` and `bar[1][0]` manually - --> $DIR/swap.rs:120:5 + --> $DIR/swap.rs:121:5 | LL | / let temp = foo[0][1]; LL | | foo[0][1] = bar[1][0]; @@ -68,7 +68,7 @@ LL | | bar[1][0] = temp; = note: or maybe you should use `std::mem::replace`? error: this looks like you are swapping `a` and `b` manually - --> $DIR/swap.rs:134:7 + --> $DIR/swap.rs:135:7 | LL | ; let t = a; | _______^ @@ -79,7 +79,7 @@ LL | | b = t; = note: or maybe you should use `std::mem::replace`? error: this looks like you are swapping `c.0` and `a` manually - --> $DIR/swap.rs:143:7 + --> $DIR/swap.rs:144:7 | LL | ; let t = c.0; | _______^ @@ -89,8 +89,18 @@ LL | | a = t; | = note: or maybe you should use `std::mem::replace`? +error: this looks like you are swapping `b` and `a` manually + --> $DIR/swap.rs:170:5 + | +LL | / let t = b; +LL | | b = a; +LL | | a = t; + | |_________^ help: try: `std::mem::swap(&mut b, &mut a)` + | + = note: or maybe you should use `std::mem::replace`? + error: this looks like you are trying to swap `a` and `b` - --> $DIR/swap.rs:131:5 + --> $DIR/swap.rs:132:5 | LL | / a = b; LL | | b = a; @@ -100,7 +110,7 @@ LL | | b = a; = note: `-D clippy::almost-swapped` implied by `-D warnings` error: this looks like you are trying to swap `c.0` and `a` - --> $DIR/swap.rs:140:5 + --> $DIR/swap.rs:141:5 | LL | / c.0 = a; LL | | a = c.0; @@ -108,8 +118,35 @@ LL | | a = c.0; | = note: or maybe you should use `std::mem::replace`? +error: this looks like you are trying to swap `a` and `b` + --> $DIR/swap.rs:148:5 + | +LL | / let a = b; +LL | | let b = a; + | |_____________^ help: try: `std::mem::swap(&mut a, &mut b)` + | + = note: or maybe you should use `std::mem::replace`? + +error: this looks like you are trying to swap `d` and `c` + --> $DIR/swap.rs:153:5 + | +LL | / d = c; +LL | | c = d; + | |_________^ help: try: `std::mem::swap(&mut d, &mut c)` + | + = note: or maybe you should use `std::mem::replace`? + +error: this looks like you are trying to swap `a` and `b` + --> $DIR/swap.rs:157:5 + | +LL | / let a = b; +LL | | b = a; + | |_________^ help: try: `std::mem::swap(&mut a, &mut b)` + | + = note: or maybe you should use `std::mem::replace`? + error: this looks like you are swapping `s.0.x` and `s.0.y` manually - --> $DIR/swap.rs:178:5 + --> $DIR/swap.rs:205:5 | LL | / let t = s.0.x; LL | | s.0.x = s.0.y; @@ -118,5 +155,5 @@ LL | | s.0.y = t; | = note: or maybe you should use `std::mem::replace`? -error: aborting due to 13 previous errors +error: aborting due to 17 previous errors diff --git a/src/tools/clippy/tests/ui/track-diagnostics.stderr b/src/tools/clippy/tests/ui/track-diagnostics.stderr index ec3031862..39418d359 100644 --- a/src/tools/clippy/tests/ui/track-diagnostics.stderr +++ b/src/tools/clippy/tests/ui/track-diagnostics.stderr @@ -2,7 +2,7 @@ error[E0308]: mismatched types --> $DIR/track-diagnostics.rs:LL:CC | LL | const S: A = B; - | ^ expected struct `A`, found struct `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 diff --git a/src/tools/clippy/tests/ui/transmute_int_to_non_zero.rs b/src/tools/clippy/tests/ui/transmute_int_to_non_zero.rs new file mode 100644 index 000000000..a38406782 --- /dev/null +++ b/src/tools/clippy/tests/ui/transmute_int_to_non_zero.rs @@ -0,0 +1,41 @@ +#![warn(clippy::transmute_int_to_non_zero)] + +use core::num::*; + +fn main() { + let int_u8: u8 = 1; + let int_u16: u16 = 1; + let int_u32: u32 = 1; + let int_u64: u64 = 1; + let int_u128: u128 = 1; + + let int_i8: i8 = 1; + let int_i16: i16 = 1; + let int_i32: i32 = 1; + let int_i64: i64 = 1; + let int_i128: i128 = 1; + + let _: NonZeroU8 = unsafe { std::mem::transmute(int_u8) }; + let _: NonZeroU16 = unsafe { std::mem::transmute(int_u16) }; + let _: NonZeroU32 = unsafe { std::mem::transmute(int_u32) }; + let _: NonZeroU64 = unsafe { std::mem::transmute(int_u64) }; + let _: NonZeroU128 = unsafe { std::mem::transmute(int_u128) }; + + let _: NonZeroI8 = unsafe { std::mem::transmute(int_i8) }; + let _: NonZeroI16 = unsafe { std::mem::transmute(int_i16) }; + let _: NonZeroI32 = unsafe { std::mem::transmute(int_i32) }; + let _: NonZeroI64 = unsafe { std::mem::transmute(int_i64) }; + let _: NonZeroI128 = unsafe { std::mem::transmute(int_i128) }; + + let _: NonZeroU8 = unsafe { NonZeroU8::new_unchecked(int_u8) }; + let _: NonZeroU16 = unsafe { NonZeroU16::new_unchecked(int_u16) }; + let _: NonZeroU32 = unsafe { NonZeroU32::new_unchecked(int_u32) }; + let _: NonZeroU64 = unsafe { NonZeroU64::new_unchecked(int_u64) }; + let _: NonZeroU128 = unsafe { NonZeroU128::new_unchecked(int_u128) }; + + let _: NonZeroI8 = unsafe { NonZeroI8::new_unchecked(int_i8) }; + let _: NonZeroI16 = unsafe { NonZeroI16::new_unchecked(int_i16) }; + let _: NonZeroI32 = unsafe { NonZeroI32::new_unchecked(int_i32) }; + let _: NonZeroI64 = unsafe { NonZeroI64::new_unchecked(int_i64) }; + let _: NonZeroI128 = unsafe { NonZeroI128::new_unchecked(int_i128) }; +} diff --git a/src/tools/clippy/tests/ui/transmute_int_to_non_zero.stderr b/src/tools/clippy/tests/ui/transmute_int_to_non_zero.stderr new file mode 100644 index 000000000..33f8ce79e --- /dev/null +++ b/src/tools/clippy/tests/ui/transmute_int_to_non_zero.stderr @@ -0,0 +1,64 @@ +error: transmute from a `u8` to a `NonZeroU8` + --> $DIR/transmute_int_to_non_zero.rs:18:33 + | +LL | let _: NonZeroU8 = unsafe { std::mem::transmute(int_u8) }; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `NonZeroU8::new_unchecked(int_u8)` + | + = note: `-D clippy::transmute-int-to-non-zero` implied by `-D warnings` + +error: transmute from a `u16` to a `NonZeroU16` + --> $DIR/transmute_int_to_non_zero.rs:19:34 + | +LL | let _: NonZeroU16 = unsafe { std::mem::transmute(int_u16) }; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `NonZeroU16::new_unchecked(int_u16)` + +error: transmute from a `u32` to a `NonZeroU32` + --> $DIR/transmute_int_to_non_zero.rs:20:34 + | +LL | let _: NonZeroU32 = unsafe { std::mem::transmute(int_u32) }; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `NonZeroU32::new_unchecked(int_u32)` + +error: transmute from a `u64` to a `NonZeroU64` + --> $DIR/transmute_int_to_non_zero.rs:21:34 + | +LL | let _: NonZeroU64 = unsafe { std::mem::transmute(int_u64) }; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `NonZeroU64::new_unchecked(int_u64)` + +error: transmute from a `u128` to a `NonZeroU128` + --> $DIR/transmute_int_to_non_zero.rs:22:35 + | +LL | let _: NonZeroU128 = unsafe { std::mem::transmute(int_u128) }; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `NonZeroU128::new_unchecked(int_u128)` + +error: transmute from a `i8` to a `NonZeroI8` + --> $DIR/transmute_int_to_non_zero.rs:24:33 + | +LL | let _: NonZeroI8 = unsafe { std::mem::transmute(int_i8) }; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `NonZeroI8::new_unchecked(int_i8)` + +error: transmute from a `i16` to a `NonZeroI16` + --> $DIR/transmute_int_to_non_zero.rs:25:34 + | +LL | let _: NonZeroI16 = unsafe { std::mem::transmute(int_i16) }; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `NonZeroI16::new_unchecked(int_i16)` + +error: transmute from a `i32` to a `NonZeroI32` + --> $DIR/transmute_int_to_non_zero.rs:26:34 + | +LL | let _: NonZeroI32 = unsafe { std::mem::transmute(int_i32) }; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `NonZeroI32::new_unchecked(int_i32)` + +error: transmute from a `i64` to a `NonZeroI64` + --> $DIR/transmute_int_to_non_zero.rs:27:34 + | +LL | let _: NonZeroI64 = unsafe { std::mem::transmute(int_i64) }; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `NonZeroI64::new_unchecked(int_i64)` + +error: transmute from a `i128` to a `NonZeroI128` + --> $DIR/transmute_int_to_non_zero.rs:28:35 + | +LL | let _: NonZeroI128 = unsafe { std::mem::transmute(int_i128) }; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `NonZeroI128::new_unchecked(int_i128)` + +error: aborting due to 10 previous errors + diff --git a/src/tools/clippy/tests/ui/transmutes_expressible_as_ptr_casts.fixed b/src/tools/clippy/tests/ui/transmutes_expressible_as_ptr_casts.fixed index 7263abac1..55307506e 100644 --- a/src/tools/clippy/tests/ui/transmutes_expressible_as_ptr_casts.fixed +++ b/src/tools/clippy/tests/ui/transmutes_expressible_as_ptr_casts.fixed @@ -51,6 +51,8 @@ fn main() { // e is a function pointer type and U is an integer; fptr-addr-cast let _usize_from_fn_ptr_transmute = unsafe { foo as usize }; let _usize_from_fn_ptr = foo as *const usize; + + let _usize_from_ref = unsafe { &1u32 as *const u32 as usize }; } // If a ref-to-ptr cast of this form where the pointer type points to a type other diff --git a/src/tools/clippy/tests/ui/transmutes_expressible_as_ptr_casts.rs b/src/tools/clippy/tests/ui/transmutes_expressible_as_ptr_casts.rs index d8e4421d4..e7360f3f9 100644 --- a/src/tools/clippy/tests/ui/transmutes_expressible_as_ptr_casts.rs +++ b/src/tools/clippy/tests/ui/transmutes_expressible_as_ptr_casts.rs @@ -51,6 +51,8 @@ fn main() { // e is a function pointer type and U is an integer; fptr-addr-cast let _usize_from_fn_ptr_transmute = unsafe { transmute::<fn(usize) -> u8, usize>(foo) }; let _usize_from_fn_ptr = foo as *const usize; + + let _usize_from_ref = unsafe { transmute::<*const u32, usize>(&1u32) }; } // If a ref-to-ptr cast of this form where the pointer type points to a type other diff --git a/src/tools/clippy/tests/ui/transmutes_expressible_as_ptr_casts.stderr b/src/tools/clippy/tests/ui/transmutes_expressible_as_ptr_casts.stderr index de9418c8d..e862fcb67 100644 --- a/src/tools/clippy/tests/ui/transmutes_expressible_as_ptr_casts.stderr +++ b/src/tools/clippy/tests/ui/transmutes_expressible_as_ptr_casts.stderr @@ -46,11 +46,17 @@ error: transmute from `fn(usize) -> u8` to `usize` which could be expressed as a LL | let _usize_from_fn_ptr_transmute = unsafe { transmute::<fn(usize) -> u8, usize>(foo) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `foo as usize` +error: transmute from `*const u32` to `usize` which could be expressed as a pointer cast instead + --> $DIR/transmutes_expressible_as_ptr_casts.rs:55:36 + | +LL | let _usize_from_ref = unsafe { transmute::<*const u32, usize>(&1u32) }; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&1u32 as *const u32 as usize` + error: transmute from a reference to a pointer - --> $DIR/transmutes_expressible_as_ptr_casts.rs:64:14 + --> $DIR/transmutes_expressible_as_ptr_casts.rs:66:14 | LL | unsafe { transmute::<&[i32; 1], *const u8>(in_param) } | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `in_param as *const [i32; 1] as *const u8` -error: aborting due to 8 previous errors +error: aborting due to 9 previous errors diff --git a/src/tools/clippy/tests/ui/type_repetition_in_bounds.rs b/src/tools/clippy/tests/ui/type_repetition_in_bounds.rs index 2eca1f470..8b4613b3f 100644 --- a/src/tools/clippy/tests/ui/type_repetition_in_bounds.rs +++ b/src/tools/clippy/tests/ui/type_repetition_in_bounds.rs @@ -1,4 +1,5 @@ #![deny(clippy::type_repetition_in_bounds)] +#![allow(clippy::extra_unused_type_parameters)] use std::ops::{Add, AddAssign, Div, DivAssign, Mul, MulAssign, Sub, SubAssign}; diff --git a/src/tools/clippy/tests/ui/type_repetition_in_bounds.stderr b/src/tools/clippy/tests/ui/type_repetition_in_bounds.stderr index 70d700c1c..a90df03c0 100644 --- a/src/tools/clippy/tests/ui/type_repetition_in_bounds.stderr +++ b/src/tools/clippy/tests/ui/type_repetition_in_bounds.stderr @@ -1,5 +1,5 @@ error: this type has already been used as a bound predicate - --> $DIR/type_repetition_in_bounds.rs:8:5 + --> $DIR/type_repetition_in_bounds.rs:9:5 | LL | T: Clone, | ^^^^^^^^ @@ -12,7 +12,7 @@ LL | #![deny(clippy::type_repetition_in_bounds)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: this type has already been used as a bound predicate - --> $DIR/type_repetition_in_bounds.rs:25:5 + --> $DIR/type_repetition_in_bounds.rs:26:5 | LL | Self: Copy + Default + Ord, | ^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -20,7 +20,7 @@ LL | Self: Copy + Default + Ord, = help: consider combining the bounds: `Self: Clone + Copy + Default + Ord` error: this type has already been used as a bound predicate - --> $DIR/type_repetition_in_bounds.rs:85:5 + --> $DIR/type_repetition_in_bounds.rs:86:5 | LL | T: Clone, | ^^^^^^^^ @@ -28,7 +28,7 @@ LL | T: Clone, = help: consider combining the bounds: `T: ?Sized + Clone` error: this type has already been used as a bound predicate - --> $DIR/type_repetition_in_bounds.rs:90:5 + --> $DIR/type_repetition_in_bounds.rs:91:5 | LL | T: ?Sized, | ^^^^^^^^^ diff --git a/src/tools/clippy/tests/ui/uninlined_format_args.fixed b/src/tools/clippy/tests/ui/uninlined_format_args.fixed index 9d08e80cf..cbd5cc5fc 100644 --- a/src/tools/clippy/tests/ui/uninlined_format_args.fixed +++ b/src/tools/clippy/tests/ui/uninlined_format_args.fixed @@ -174,3 +174,7 @@ fn _meets_msrv() { let local_i32 = 1; println!("expand='{local_i32}'"); } + +fn _do_not_fire() { + println!("{:?}", None::<()>); +} diff --git a/src/tools/clippy/tests/ui/uninlined_format_args.rs b/src/tools/clippy/tests/ui/uninlined_format_args.rs index 35b3677a8..cf0ea5be4 100644 --- a/src/tools/clippy/tests/ui/uninlined_format_args.rs +++ b/src/tools/clippy/tests/ui/uninlined_format_args.rs @@ -179,3 +179,7 @@ fn _meets_msrv() { let local_i32 = 1; println!("expand='{}'", local_i32); } + +fn _do_not_fire() { + println!("{:?}", None::<()>); +} diff --git a/src/tools/clippy/tests/ui/unnecessary_safety_comment.rs b/src/tools/clippy/tests/ui/unnecessary_safety_comment.rs index 7fefea705..89fedb145 100644 --- a/src/tools/clippy/tests/ui/unnecessary_safety_comment.rs +++ b/src/tools/clippy/tests/ui/unnecessary_safety_comment.rs @@ -48,4 +48,21 @@ fn unnecessary_on_stmt_and_expr() -> u32 { 24 } +mod issue_10084 { + unsafe fn bar() -> i32 { + 42 + } + + macro_rules! foo { + () => { + // SAFETY: This is necessary + unsafe { bar() } + }; + } + + fn main() { + foo!(); + } +} + fn main() {} diff --git a/src/tools/clippy/tests/ui/unreadable_literal.fixed b/src/tools/clippy/tests/ui/unreadable_literal.fixed index a67363b09..13e5feb19 100644 --- a/src/tools/clippy/tests/ui/unreadable_literal.fixed +++ b/src/tools/clippy/tests/ui/unreadable_literal.fixed @@ -23,7 +23,7 @@ fn main() { let _good = ( 0b1011_i64, 0o1_234_u32, - 0x0123_4567, + 0x1_234_567, 65536, 1_2345_6789, 1234_f32, diff --git a/src/tools/clippy/tests/ui/unreadable_literal.stderr b/src/tools/clippy/tests/ui/unreadable_literal.stderr index b51130c6a..450121b1c 100644 --- a/src/tools/clippy/tests/ui/unreadable_literal.stderr +++ b/src/tools/clippy/tests/ui/unreadable_literal.stderr @@ -1,11 +1,3 @@ -error: digits of hex or binary literal not grouped by four - --> $DIR/unreadable_literal.rs:26:9 - | -LL | 0x1_234_567, - | ^^^^^^^^^^^ help: consider: `0x0123_4567` - | - = note: `-D clippy::unusual-byte-groupings` implied by `-D warnings` - error: long literal lacking separators --> $DIR/unreadable_literal.rs:34:17 | @@ -68,5 +60,5 @@ error: long literal lacking separators LL | let _fail5 = 1.100300400; | ^^^^^^^^^^^ help: consider: `1.100_300_400` -error: aborting due to 11 previous errors +error: aborting due to 10 previous errors diff --git a/src/tools/clippy/tests/ui/unused_io_amount.rs b/src/tools/clippy/tests/ui/unused_io_amount.rs index 4b0595581..8d3e094b7 100644 --- a/src/tools/clippy/tests/ui/unused_io_amount.rs +++ b/src/tools/clippy/tests/ui/unused_io_amount.rs @@ -63,6 +63,14 @@ fn combine_or(file: &str) -> Result<(), Error> { Ok(()) } +fn is_ok_err<T: io::Read + io::Write>(s: &mut T) { + s.write(b"ok").is_ok(); + s.write(b"err").is_err(); + let mut buf = [0u8; 0]; + s.read(&mut buf).is_ok(); + s.read(&mut buf).is_err(); +} + async fn bad_async_write<W: AsyncWrite + Unpin>(w: &mut W) { w.write(b"hello world").await.unwrap(); } diff --git a/src/tools/clippy/tests/ui/unused_io_amount.stderr b/src/tools/clippy/tests/ui/unused_io_amount.stderr index 7ba7e09c0..0865c5213 100644 --- a/src/tools/clippy/tests/ui/unused_io_amount.stderr +++ b/src/tools/clippy/tests/ui/unused_io_amount.stderr @@ -82,13 +82,45 @@ LL | | .expect("error"); error: written amount is not handled --> $DIR/unused_io_amount.rs:67:5 | +LL | s.write(b"ok").is_ok(); + | ^^^^^^^^^^^^^^^^^^^^^^ + | + = help: use `Write::write_all` instead, or handle partial writes + +error: written amount is not handled + --> $DIR/unused_io_amount.rs:68:5 + | +LL | s.write(b"err").is_err(); + | ^^^^^^^^^^^^^^^^^^^^^^^^ + | + = help: use `Write::write_all` instead, or handle partial writes + +error: read amount is not handled + --> $DIR/unused_io_amount.rs:70:5 + | +LL | s.read(&mut buf).is_ok(); + | ^^^^^^^^^^^^^^^^^^^^^^^^ + | + = help: use `Read::read_exact` instead, or handle partial reads + +error: read amount is not handled + --> $DIR/unused_io_amount.rs:71:5 + | +LL | s.read(&mut buf).is_err(); + | ^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = help: use `Read::read_exact` instead, or handle partial reads + +error: written amount is not handled + --> $DIR/unused_io_amount.rs:75:5 + | LL | w.write(b"hello world").await.unwrap(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = help: use `AsyncWriteExt::write_all` instead, or handle partial writes error: read amount is not handled - --> $DIR/unused_io_amount.rs:72:5 + --> $DIR/unused_io_amount.rs:80:5 | LL | r.read(&mut buf[..]).await.unwrap(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -96,7 +128,7 @@ LL | r.read(&mut buf[..]).await.unwrap(); = help: use `AsyncReadExt::read_exact` instead, or handle partial reads error: written amount is not handled - --> $DIR/unused_io_amount.rs:85:9 + --> $DIR/unused_io_amount.rs:93:9 | LL | w.write(b"hello world").await?; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -104,7 +136,7 @@ LL | w.write(b"hello world").await?; = help: use `AsyncWriteExt::write_all` instead, or handle partial writes error: read amount is not handled - --> $DIR/unused_io_amount.rs:93:9 + --> $DIR/unused_io_amount.rs:101:9 | LL | r.read(&mut buf[..]).await.or(Err(Error::Kind))?; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -112,7 +144,7 @@ LL | r.read(&mut buf[..]).await.or(Err(Error::Kind))?; = help: use `AsyncReadExt::read_exact` instead, or handle partial reads error: written amount is not handled - --> $DIR/unused_io_amount.rs:101:5 + --> $DIR/unused_io_amount.rs:109:5 | LL | w.write(b"hello world").await.unwrap(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -120,12 +152,12 @@ LL | w.write(b"hello world").await.unwrap(); = help: use `AsyncWriteExt::write_all` instead, or handle partial writes error: read amount is not handled - --> $DIR/unused_io_amount.rs:106:5 + --> $DIR/unused_io_amount.rs:114:5 | LL | r.read(&mut buf[..]).await.unwrap(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = help: use `AsyncReadExt::read_exact` instead, or handle partial reads -error: aborting due to 16 previous errors +error: aborting due to 20 previous errors diff --git a/src/tools/clippy/tests/ui/wildcard_enum_match_arm.fixed b/src/tools/clippy/tests/ui/wildcard_enum_match_arm.fixed index 236074978..293bf75a7 100644 --- a/src/tools/clippy/tests/ui/wildcard_enum_match_arm.fixed +++ b/src/tools/clippy/tests/ui/wildcard_enum_match_arm.fixed @@ -96,7 +96,7 @@ fn main() { } match Enum::A { Enum::A => (), - Enum::B | _ => (), + Enum::B | Enum::__Private => (), } } } diff --git a/src/tools/clippy/tests/ui/wildcard_enum_match_arm.stderr b/src/tools/clippy/tests/ui/wildcard_enum_match_arm.stderr index efecc9576..30d29aa4e 100644 --- a/src/tools/clippy/tests/ui/wildcard_enum_match_arm.stderr +++ b/src/tools/clippy/tests/ui/wildcard_enum_match_arm.stderr @@ -34,11 +34,11 @@ error: wildcard matches known variants and will also match future added variants LL | _ => {}, | ^ help: try this: `ErrorKind::PermissionDenied | _` -error: wildcard matches known variants and will also match future added variants +error: wildcard match will also match any future added variants --> $DIR/wildcard_enum_match_arm.rs:99:13 | LL | _ => (), - | ^ help: try this: `Enum::B | _` + | ^ help: try this: `Enum::B | Enum::__Private` error: aborting due to 6 previous errors |