diff options
Diffstat (limited to 'vendor/gix-macros')
| -rw-r--r-- | vendor/gix-macros/.cargo-checksum.json | 1 | ||||
| -rw-r--r-- | vendor/gix-macros/CHANGELOG.md | 42 | ||||
| -rw-r--r-- | vendor/gix-macros/Cargo.toml | 48 | ||||
| -rw-r--r-- | vendor/gix-macros/LICENSE-APACHE | 191 | ||||
| -rw-r--r-- | vendor/gix-macros/LICENSE-MIT | 21 | ||||
| -rw-r--r-- | vendor/gix-macros/src/lib.rs | 25 | ||||
| -rw-r--r-- | vendor/gix-macros/src/momo.rs | 300 |
7 files changed, 628 insertions, 0 deletions
diff --git a/vendor/gix-macros/.cargo-checksum.json b/vendor/gix-macros/.cargo-checksum.json new file mode 100644 index 000000000..34830fc82 --- /dev/null +++ b/vendor/gix-macros/.cargo-checksum.json @@ -0,0 +1 @@ +{"files":{"CHANGELOG.md":"4e41a2cd2233b9444744d8c1a6ba04749a4f3020229a7bb8f27c9cb65881907c","Cargo.toml":"c164d4484f913884402cef2f7dd43ec3e28306f716ca07fca180be49cf735e5c","LICENSE-APACHE":"cb4780590812826851ba250f90bed0ed19506ec98f6865a0e2e20bbf62391ff9","LICENSE-MIT":"49df47913ab2beafe8dc45607877ae64198bf0eee64aaad3e82ed9e4d27424e8","src/lib.rs":"e6d25ecd41fc4c87d46295b9752a6a0f61034ef5d0e44962b43906da18e12d4d","src/momo.rs":"104edc9f2c8dc3c0d14adbdd19b0e21131f7738459f6be7f4f39955e7cfaf950"},"package":"9d8acb5ee668d55f0f2d19a320a3f9ef67a6999ad483e11135abcc2464ed18b6"}
\ No newline at end of file diff --git a/vendor/gix-macros/CHANGELOG.md b/vendor/gix-macros/CHANGELOG.md new file mode 100644 index 000000000..d1c24c0ac --- /dev/null +++ b/vendor/gix-macros/CHANGELOG.md @@ -0,0 +1,42 @@ +# Changelog + +All notable changes to this project will be documented in this file. + +The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), +and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html). + +## 0.1.0 (2023-09-08) + +The initial release with support for the `momo` proc-macro. + +### Commit Statistics + +<csr-read-only-do-not-edit/> + + - 14 commits contributed to the release over the course of 13 calendar days. + - 0 commits were understood as [conventional](https://www.conventionalcommits.org). + - 0 issues like '(#ID)' were seen in commit messages + +### Commit Details + +<csr-read-only-do-not-edit/> + +<details><summary>view details</summary> + + * **Uncategorized** + - Prepare changelogs for release ([`375db06`](https://github.com/Byron/gitoxide/commit/375db06a8442378c3f7a922fae38e2a6694d9d04)) + - Merge branch 'feat/gix-momo' ([`a1ed6a1`](https://github.com/Byron/gitoxide/commit/a1ed6a1aacae02a167b7ec44e1a47411a2194ff7)) + - Consolidate compile tests ([`d76efdd`](https://github.com/Byron/gitoxide/commit/d76efddf5afb73563ce7e837cf975cedd01e979c)) + - Revert to use `item_fn.span()` ([`72545e9`](https://github.com/Byron/gitoxide/commit/72545e971c894de511a723f6d5515f637a84f28f)) + - Fix ui test `error_if_ineffective` ([`9be2622`](https://github.com/Byron/gitoxide/commit/9be26220876498df4d1add77da45c415268a77dc)) + - Add test-suite for failure modes ([`c8e7324`](https://github.com/Byron/gitoxide/commit/c8e732430f3740348ccedd0dc1a9a28b06a0adee)) + - Remove `TODO` in `gix-macros/src/lib.rs` ([`c4ed7c1`](https://github.com/Byron/gitoxide/commit/c4ed7c180e3ec1ff75cb10d78d4b8eed3b75be2f)) + - Improve docs ([`705f2f3`](https://github.com/Byron/gitoxide/commit/705f2f34f1fa95d767646b154f41d2a6ce65ad10)) + - Refactor ([`48a2088`](https://github.com/Byron/gitoxide/commit/48a20888d158b94811074a09a8c57ff5c8410769)) + - Feat `momo`: Rm unnecessary `#[allow(unused_mut)]` on generated inner fn ([`b619456`](https://github.com/Byron/gitoxide/commit/b6194568e1d3042305f472103e1c00549cc4ccb9)) + - Feat `momo`: Support parsing pattern in params ([`b5f78be`](https://github.com/Byron/gitoxide/commit/b5f78be06792153cd981c316a486974c000f1fd8)) + - Dramatically simplify `gix_macros::momo` ([`c72eaa0`](https://github.com/Byron/gitoxide/commit/c72eaa05697a3e34adaa3ee90584dce4b5c00120)) + - Remove `TryInto` support from `gix_macros::momo` ([`95a1626`](https://github.com/Byron/gitoxide/commit/95a16264b0a6f8c7d8e2acded3a4c9c170c2729b)) + - Add new crate `gix-macros` ([`6dae9e9`](https://github.com/Byron/gitoxide/commit/6dae9e9d455ba5e3bf18c452789d07ff6cfaf392)) +</details> + diff --git a/vendor/gix-macros/Cargo.toml b/vendor/gix-macros/Cargo.toml new file mode 100644 index 000000000..4cefc9fd9 --- /dev/null +++ b/vendor/gix-macros/Cargo.toml @@ -0,0 +1,48 @@ +# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO +# +# When uploading crates to the registry Cargo will automatically +# "normalize" Cargo.toml files for maximal compatibility +# with all versions of Cargo and also rewrite `path` dependencies +# to registry (e.g., crates.io) dependencies. +# +# If you are reading this file be aware that the original Cargo.toml +# will likely look very different (and much more reasonable). +# See Cargo.toml.orig for the original contents. + +[package] +edition = "2021" +rust-version = "1.65" +name = "gix-macros" +version = "0.1.0" +authors = [ + "Jiahao XU <Jiahao_XU@outlook.com>", + "Andre Bogus <bogusandre@gmail.com>", + "Sebastian Thiel <sebastian.thiel@icloud.com>", +] +include = [ + "src/**/*", + "LICENSE-*", + "CHANGELOG.md", +] +description = "Proc-macro utilities for gix" +license = "MIT OR Apache-2.0" +repository = "https://github.com/Byron/gitoxide" + +[lib] +proc_macro = true + +[dependencies.proc-macro2] +version = "1.0" + +[dependencies.quote] +version = "1.0" + +[dependencies.syn] +version = "2.0" +features = [ + "full", + "fold", +] + +[dev-dependencies.trybuild] +version = "1.0" diff --git a/vendor/gix-macros/LICENSE-APACHE b/vendor/gix-macros/LICENSE-APACHE new file mode 100644 index 000000000..a51f59a06 --- /dev/null +++ b/vendor/gix-macros/LICENSE-APACHE @@ -0,0 +1,191 @@ + + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. Definitions. + + "License" shall mean the terms and conditions for use, reproduction, + and distribution as defined by Sections 1 through 9 of this document. + + "Licensor" shall mean the copyright owner or entity authorized by + the copyright owner that is granting the License. + + "Legal Entity" shall mean the union of the acting entity and all + other entities that control, are controlled by, or are under common + control with that entity. For the purposes of this definition, + "control" means (i) the power, direct or indirect, to cause the + direction or management of such entity, whether by contract or + otherwise, or (ii) ownership of fifty percent (50%) or more of the + outstanding shares, or (iii) beneficial ownership of such entity. + + "You" (or "Your") shall mean an individual or Legal Entity + exercising permissions granted by this License. + + "Source" form shall mean the preferred form for making modifications, + including but not limited to software source code, documentation + source, and configuration files. + + "Object" form shall mean any form resulting from mechanical + transformation or translation of a Source form, including but + not limited to compiled object code, generated documentation, + and conversions to other media types. + + "Work" shall mean the work of authorship, whether in Source or + Object form, made available under the License, as indicated by a + copyright notice that is included in or attached to the work + (an example is provided in the Appendix below). + + "Derivative Works" shall mean any work, whether in Source or Object + form, that is based on (or derived from) the Work and for which the + editorial revisions, annotations, elaborations, or other modifications + represent, as a whole, an original work of authorship. For the purposes + of this License, Derivative Works shall not include works that remain + separable from, or merely link (or bind by name) to the interfaces of, + the Work and Derivative Works thereof. + + "Contribution" shall mean any work of authorship, including + the original version of the Work and any modifications or additions + to that Work or Derivative Works thereof, that is intentionally + submitted to Licensor for inclusion in the Work by the copyright owner + or by an individual or Legal Entity authorized to submit on behalf of + the copyright owner. For the purposes of this definition, "submitted" + means any form of electronic, verbal, or written communication sent + to the Licensor or its representatives, including but not limited to + communication on electronic mailing lists, source code control systems, + and issue tracking systems that are managed by, or on behalf of, the + Licensor for the purpose of discussing and improving the Work, but + excluding communication that is conspicuously marked or otherwise + designated in writing by the copyright owner as "Not a Contribution." + + "Contributor" shall mean Licensor and any individual or Legal Entity + on behalf of whom a Contribution has been received by Licensor and + subsequently incorporated within the Work. + + 2. Grant of Copyright License. Subject to the terms and conditions of + this License, each Contributor hereby grants to You a perpetual, + worldwide, non-exclusive, no-charge, royalty-free, irrevocable + copyright license to reproduce, prepare Derivative Works of, + publicly display, publicly perform, sublicense, and distribute the + Work and such Derivative Works in Source or Object form. + + 3. Grant of Patent License. Subject to the terms and conditions of + this License, each Contributor hereby grants to You a perpetual, + worldwide, non-exclusive, no-charge, royalty-free, irrevocable + (except as stated in this section) patent license to make, have made, + use, offer to sell, sell, import, and otherwise transfer the Work, + where such license applies only to those patent claims licensable + by such Contributor that are necessarily infringed by their + Contribution(s) alone or by combination of their Contribution(s) + with the Work to which such Contribution(s) was submitted. If You + institute patent litigation against any entity (including a + cross-claim or counterclaim in a lawsuit) alleging that the Work + or a Contribution incorporated within the Work constitutes direct + or contributory patent infringement, then any patent licenses + granted to You under this License for that Work shall terminate + as of the date such litigation is filed. + + 4. Redistribution. You may reproduce and distribute copies of the + Work or Derivative Works thereof in any medium, with or without + modifications, and in Source or Object form, provided that You + meet the following conditions: + + (a) You must give any other recipients of the Work or + Derivative Works a copy of this License; and + + (b) You must cause any modified files to carry prominent notices + stating that You changed the files; and + + (c) You must retain, in the Source form of any Derivative Works + that You distribute, all copyright, patent, trademark, and + attribution notices from the Source form of the Work, + excluding those notices that do not pertain to any part of + the Derivative Works; and + + (d) If the Work includes a "NOTICE" text file as part of its + distribution, then any Derivative Works that You distribute must + include a readable copy of the attribution notices contained + within such NOTICE file, excluding those notices that do not + pertain to any part of the Derivative Works, in at least one + of the following places: within a NOTICE text file distributed + as part of the Derivative Works; within the Source form or + documentation, if provided along with the Derivative Works; or, + within a display generated by the Derivative Works, if and + wherever such third-party notices normally appear. The contents + of the NOTICE file are for informational purposes only and + do not modify the License. You may add Your own attribution + notices within Derivative Works that You distribute, alongside + or as an addendum to the NOTICE text from the Work, provided + that such additional attribution notices cannot be construed + as modifying the License. + + You may add Your own copyright statement to Your modifications and + may provide additional or different license terms and conditions + for use, reproduction, or distribution of Your modifications, or + for any such Derivative Works as a whole, provided Your use, + reproduction, and distribution of the Work otherwise complies with + the conditions stated in this License. + + 5. Submission of Contributions. Unless You explicitly state otherwise, + any Contribution intentionally submitted for inclusion in the Work + by You to the Licensor shall be under the terms and conditions of + this License, without any additional terms or conditions. + Notwithstanding the above, nothing herein shall supersede or modify + the terms of any separate license agreement you may have executed + with Licensor regarding such Contributions. + + 6. Trademarks. This License does not grant permission to use the trade + names, trademarks, service marks, or product names of the Licensor, + except as required for reasonable and customary use in describing the + origin of the Work and reproducing the content of the NOTICE file. + + 7. Disclaimer of Warranty. Unless required by applicable law or + agreed to in writing, Licensor provides the Work (and each + Contributor provides its Contributions) on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + implied, including, without limitation, any warranties or conditions + of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A + PARTICULAR PURPOSE. You are solely responsible for determining the + appropriateness of using or redistributing the Work and assume any + risks associated with Your exercise of permissions under this License. + + 8. Limitation of Liability. In no event and under no legal theory, + whether in tort (including negligence), contract, or otherwise, + unless required by applicable law (such as deliberate and grossly + negligent acts) or agreed to in writing, shall any Contributor be + liable to You for damages, including any direct, indirect, special, + incidental, or consequential damages of any character arising as a + result of this License or out of the use or inability to use the + Work (including but not limited to damages for loss of goodwill, + work stoppage, computer failure or malfunction, or any and all + other commercial damages or losses), even if such Contributor + has been advised of the possibility of such damages. + + 9. Accepting Warranty or Additional Liability. While redistributing + the Work or Derivative Works thereof, You may choose to offer, + and charge a fee for, acceptance of support, warranty, indemnity, + or other liability obligations and/or rights consistent with this + License. However, in accepting such obligations, You may act only + on Your own behalf and on Your sole responsibility, not on behalf + of any other Contributor, and only if You agree to indemnify, + defend, and hold each Contributor harmless for any liability + incurred by, or claims asserted against, such Contributor by reason + of your accepting any such warranty or additional liability. + + END OF TERMS AND CONDITIONS + + Copyright 2018-2021 Sebastian Thiel, and [contributors](https://github.com/byron/gitoxide/contributors) + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/vendor/gix-macros/LICENSE-MIT b/vendor/gix-macros/LICENSE-MIT new file mode 100644 index 000000000..b58e818f1 --- /dev/null +++ b/vendor/gix-macros/LICENSE-MIT @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2018-2021 Sebastian Thiel, and [contributors](https://github.com/byron/gitoxide/contributors). + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/vendor/gix-macros/src/lib.rs b/vendor/gix-macros/src/lib.rs new file mode 100644 index 000000000..4693a79e8 --- /dev/null +++ b/vendor/gix-macros/src/lib.rs @@ -0,0 +1,25 @@ +//! A crate of useful macros used in `gix` primarily. +//! +//! Note that within `gix-*` crates, monomorphization should never be used for convenience, but only for performance +//! reasons. And in the latter case, manual denomophization should be considered if the trait in questions isn't called +//! often enough or measurements indicate that `&dyn Trait` is increasing the runtime. Thus, `gix-*` crates should probably +//! by default prefer using `&dyn` unless measurements indicate otherwise. +use proc_macro::TokenStream; + +/// When applied to functions or methods, it will turn it into a wrapper that will immediately call +/// a de-monomorphized implementation (i.e. one that uses `&dyn Trait`). +/// +/// That way, the landing-pads for convenience will be as small as possible which then delegate to a single +/// function or method for implementation. +/// +/// The parameters using the following traits can be de-monomorphized: +/// +/// * `Into` +/// * `AsRef` +/// * `AsMut` +#[proc_macro_attribute] +pub fn momo(_attrs: TokenStream, input: TokenStream) -> TokenStream { + momo::inner(input.into()).into() +} + +mod momo; diff --git a/vendor/gix-macros/src/momo.rs b/vendor/gix-macros/src/momo.rs new file mode 100644 index 000000000..802f4b5b0 --- /dev/null +++ b/vendor/gix-macros/src/momo.rs @@ -0,0 +1,300 @@ +use std::collections::HashMap; + +use quote::quote; +use syn::{punctuated::Punctuated, spanned::Spanned, *}; + +pub(crate) fn inner(code: proc_macro2::TokenStream) -> proc_macro2::TokenStream { + let fn_item: Item = match syn::parse2(code.clone()) { + Ok(input) => input, + Err(err) => return err.to_compile_error(), + }; + + if let Item::Fn(item_fn) = fn_item { + let ty_conversions = parse_generics(&item_fn.sig); + let (has_conversion_in_effect, argtypes, argexprs, has_self) = convert(&item_fn.sig.inputs, &ty_conversions); + if !has_conversion_in_effect { + return Error::new( + item_fn.span(), + "Couldn't apply a single conversion - momo is ineffective here", + ) + .to_compile_error(); + } + + let uses_self = has_self + || item_fn.sig.inputs.iter().any(has_self_type) + || matches!(&item_fn.sig.output, ReturnType::Type(_, ty) if contains_self_type(ty)); + + let inner_ident = Ident::new( + // Use long qualifier to avoid name collision. + &format!("_{}_inner_generated_by_gix_macro_momo", item_fn.sig.ident), + proc_macro2::Span::call_site(), + ); + + let outer_sig = Signature { + inputs: argtypes, + ..item_fn.sig.clone() + }; + + let new_inner_item = Item::Fn(ItemFn { + // Remove doc comment since they will increase compile-time and + // also generates duplicate warning/error messages for the doc, + // especially if it contains doc-tests. + attrs: { + let mut attrs = item_fn.attrs.clone(); + attrs.retain(|attr| { + let segments = &attr.path().segments; + !(segments.len() == 1 && segments[0].ident == "doc") + }); + attrs + }, + vis: Visibility::Inherited, + sig: Signature { + ident: inner_ident.clone(), + ..item_fn.sig + }, + block: item_fn.block, + }); + + if uses_self { + // We can use `self` or `Self` inside function defined within + // the impl-fn, so instead declare two separate functions. + // + // Since it's an impl block, it's unlikely to have name conflict, + // though this won't work for impl-trait. + // + // This approach also make sure we can call the right function + // using `Self` qualifier. + let new_item = Item::Fn(ItemFn { + attrs: item_fn.attrs, + vis: item_fn.vis, + sig: outer_sig, + block: if has_self { + parse_quote!({ self.#inner_ident(#argexprs) }) + } else { + parse_quote!({ Self::#inner_ident(#argexprs) }) + }, + }); + quote!(#new_item #new_inner_item) + } else { + // Put the new inner function within the function block + // to avoid duplicate function name and support associated + // function that doesn't use `self` or `Self`. + let new_item = Item::Fn(ItemFn { + attrs: item_fn.attrs, + vis: item_fn.vis, + sig: outer_sig, + block: parse_quote!({ + #new_inner_item + + #inner_ident(#argexprs) + }), + }); + quote!(#new_item) + } + } else { + Error::new(fn_item.span(), "expect a function").to_compile_error() + } +} + +#[derive(Copy, Clone)] +// All conversions we support. Check references to this type for an idea how to add more. +enum Conversion<'a> { + Into(&'a Type), + AsRef(&'a Type), + AsMut(&'a Type), +} + +impl<'a> Conversion<'a> { + fn conversion_expr(&self, i: &Ident) -> Expr { + match *self { + Conversion::Into(_) => parse_quote!(#i.into()), + Conversion::AsRef(_) => parse_quote!(#i.as_ref()), + Conversion::AsMut(_) => parse_quote!(#i.as_mut()), + } + } +} + +fn parse_bounded_type(ty: &Type) -> Option<Ident> { + match &ty { + Type::Path(TypePath { qself: None, path }) if path.segments.len() == 1 => Some(path.segments[0].ident.clone()), + _ => None, + } +} + +fn parse_bounds(bounds: &Punctuated<TypeParamBound, Token![+]>) -> Option<Conversion> { + if bounds.len() != 1 { + return None; + } + if let TypeParamBound::Trait(ref tb) = bounds.first().unwrap() { + if let Some(seg) = tb.path.segments.iter().last() { + if let PathArguments::AngleBracketed(ref gen_args) = seg.arguments { + if let GenericArgument::Type(ref arg_ty) = gen_args.args.first().unwrap() { + if seg.ident == "Into" { + return Some(Conversion::Into(arg_ty)); + } else if seg.ident == "AsRef" { + return Some(Conversion::AsRef(arg_ty)); + } else if seg.ident == "AsMut" { + return Some(Conversion::AsMut(arg_ty)); + } + } + } + } + } + None +} + +// create a map from generic type to Conversion +fn parse_generics(decl: &Signature) -> HashMap<Ident, Conversion<'_>> { + let mut ty_conversions = HashMap::new(); + for gp in decl.generics.params.iter() { + if let GenericParam::Type(ref tp) = gp { + if let Some(conversion) = parse_bounds(&tp.bounds) { + ty_conversions.insert(tp.ident.clone(), conversion); + } + } + } + if let Some(ref wc) = decl.generics.where_clause { + for wp in wc.predicates.iter() { + if let WherePredicate::Type(ref pt) = wp { + if let Some(ident) = parse_bounded_type(&pt.bounded_ty) { + if let Some(conversion) = parse_bounds(&pt.bounds) { + ty_conversions.insert(ident, conversion); + } + } + } + } + } + ty_conversions +} + +fn convert<'a>( + inputs: &'a Punctuated<FnArg, Token![,]>, + ty_conversions: &HashMap<Ident, Conversion<'a>>, +) -> (bool, Punctuated<FnArg, Token![,]>, Punctuated<Expr, Token![,]>, bool) { + let mut has_conversion_in_effect = false; + let mut argtypes = Punctuated::new(); + let mut argexprs = Punctuated::new(); + let mut has_self = false; + inputs.iter().enumerate().for_each(|(i, input)| match input.clone() { + FnArg::Receiver(receiver) => { + has_self = true; + argtypes.push(FnArg::Receiver(receiver)); + } + FnArg::Typed(mut pat_type) => { + let pat_ident = match &mut *pat_type.pat { + Pat::Ident(pat_ident) if pat_ident.by_ref.is_none() && pat_ident.subpat.is_none() => pat_ident, + _ => { + pat_type.pat = Box::new(Pat::Ident(PatIdent { + ident: Ident::new(&format!("arg_{i}_gen_by_momo_"), proc_macro2::Span::call_site()), + attrs: Default::default(), + by_ref: None, + mutability: None, + subpat: None, + })); + + if let Pat::Ident(pat_ident) = &mut *pat_type.pat { + pat_ident + } else { + panic!() + } + } + }; + // Outer function type argument pat does not need mut unless its + // type is `impl AsMut`. + pat_ident.mutability = None; + + let ident = &pat_ident.ident; + + let to_expr = || parse_quote!(#ident); + + match *pat_type.ty { + Type::ImplTrait(TypeImplTrait { ref bounds, .. }) => { + if let Some(conv) = parse_bounds(bounds) { + has_conversion_in_effect = true; + argexprs.push(conv.conversion_expr(ident)); + if let Conversion::AsMut(_) = conv { + pat_ident.mutability = Some(Default::default()); + } + } else { + argexprs.push(to_expr()); + } + } + Type::Path(..) => { + if let Some(conv) = parse_bounded_type(&pat_type.ty).and_then(|ident| ty_conversions.get(&ident)) { + has_conversion_in_effect = true; + argexprs.push(conv.conversion_expr(ident)); + if let Conversion::AsMut(_) = conv { + pat_ident.mutability = Some(Default::default()); + } + } else { + argexprs.push(to_expr()); + } + } + _ => { + argexprs.push(to_expr()); + } + } + + // Now that mutability is decided, push the type into argtypes + argtypes.push(FnArg::Typed(pat_type)); + } + }); + (has_conversion_in_effect, argtypes, argexprs, has_self) +} + +fn contains_self_type_path(path: &Path) -> bool { + path.segments.iter().any(|segment| { + segment.ident == "Self" + || match &segment.arguments { + PathArguments::AngleBracketed(AngleBracketedGenericArguments { args, .. }) => { + args.iter().any(|generic_arg| match generic_arg { + GenericArgument::Type(ty) => contains_self_type(ty), + GenericArgument::Const(expr) => contains_self_type_expr(expr), + _ => false, + }) + } + PathArguments::Parenthesized(ParenthesizedGenericArguments { inputs, output, .. }) => { + inputs.iter().any(contains_self_type) + || matches!(output, ReturnType::Type(_, ty) if contains_self_type(ty)) + } + _ => false, + } + }) +} + +fn contains_self_type_expr(expr: &Expr) -> bool { + match expr { + Expr::Path(ExprPath { qself: Some(_), .. }) => true, + Expr::Path(ExprPath { path, .. }) => contains_self_type_path(path), + _ => false, + } +} + +fn contains_self_type(input: &Type) -> bool { + match input { + Type::Array(TypeArray { elem, len, .. }) => { + // Call `matches!` first so that we can do tail call here + // as an optimization. + contains_self_type_expr(len) || contains_self_type(elem) + } + Type::Group(TypeGroup { elem, .. }) => contains_self_type(elem), + Type::Paren(TypeParen { elem, .. }) => contains_self_type(elem), + Type::Ptr(TypePtr { elem, .. }) => contains_self_type(elem), + Type::Reference(TypeReference { elem, .. }) => contains_self_type(elem), + Type::Slice(TypeSlice { elem, .. }) => contains_self_type(elem), + + Type::Tuple(TypeTuple { elems, .. }) => elems.iter().any(contains_self_type), + + Type::Path(TypePath { qself: Some(_), .. }) => true, + Type::Path(TypePath { path, .. }) => contains_self_type_path(path), + + _ => false, + } +} + +fn has_self_type(input: &FnArg) -> bool { + match input { + FnArg::Receiver(_) => true, + FnArg::Typed(PatType { ty, .. }) => contains_self_type(ty), + } +} |