[ { "path": ".github/FUNDING.yml", "content": "github: dtolnay\n" }, { "path": ".github/workflows/ci.yml", "content": "name: CI\n\non:\n push:\n pull_request:\n workflow_dispatch:\n schedule: [cron: \"40 1 * * *\"]\n\npermissions:\n contents: read\n\nenv:\n RUSTFLAGS: -Dwarnings\n\njobs:\n pre_ci:\n uses: dtolnay/.github/.github/workflows/pre_ci.yml@master\n\n test:\n name: Rust ${{matrix.rust}}\n needs: pre_ci\n if: needs.pre_ci.outputs.continue\n runs-on: ubuntu-latest\n strategy:\n fail-fast: false\n matrix:\n rust: [nightly, beta, stable, 1.85.0, 1.71.0]\n timeout-minutes: 45\n steps:\n - uses: actions/checkout@v6\n - uses: dtolnay/rust-toolchain@master\n with:\n toolchain: ${{matrix.rust}}\n - name: Enable type layout randomization\n run: echo RUSTFLAGS=${RUSTFLAGS}\\ -Zrandomize-layout >> $GITHUB_ENV\n if: matrix.rust == 'nightly'\n - run: cargo check\n - run: cargo test\n if: matrix.rust != '1.71.0'\n - uses: actions/upload-artifact@v6\n if: matrix.rust == 'nightly' && always()\n with:\n name: Cargo.lock\n path: Cargo.lock\n continue-on-error: true\n\n minimal:\n name: Minimal versions\n needs: pre_ci\n if: needs.pre_ci.outputs.continue\n runs-on: ubuntu-latest\n timeout-minutes: 45\n steps:\n - uses: actions/checkout@v6\n - uses: dtolnay/rust-toolchain@nightly\n - run: cargo generate-lockfile -Z minimal-versions\n - run: cargo check --locked\n\n doc:\n name: Documentation\n needs: pre_ci\n if: needs.pre_ci.outputs.continue\n runs-on: ubuntu-latest\n timeout-minutes: 45\n env:\n RUSTDOCFLAGS: -Dwarnings\n steps:\n - uses: actions/checkout@v6\n - uses: dtolnay/rust-toolchain@nightly\n - uses: dtolnay/install@cargo-docs-rs\n - run: cargo docs-rs\n\n clippy:\n name: Clippy\n runs-on: ubuntu-latest\n if: github.event_name != 'pull_request'\n timeout-minutes: 45\n steps:\n - uses: actions/checkout@v6\n - uses: dtolnay/rust-toolchain@clippy\n - run: cargo clippy --tests -- -Dclippy::all -Dclippy::pedantic\n\n miri:\n name: Miri\n needs: pre_ci\n if: needs.pre_ci.outputs.continue\n runs-on: ubuntu-latest\n timeout-minutes: 45\n steps:\n - uses: actions/checkout@v6\n - uses: dtolnay/rust-toolchain@miri\n - run: cargo miri setup\n - run: cargo miri test\n env:\n MIRIFLAGS: -Zmiri-strict-provenance\n\n outdated:\n name: Outdated\n runs-on: ubuntu-latest\n if: github.event_name != 'pull_request'\n timeout-minutes: 45\n steps:\n - uses: actions/checkout@v6\n - uses: dtolnay/rust-toolchain@stable\n - uses: dtolnay/install@cargo-outdated\n - run: cargo outdated --workspace --exit-code 1\n" }, { "path": ".gitignore", "content": "/target/\n/Cargo.lock\n" }, { "path": "Cargo.toml", "content": "[package]\nname = \"inherent\"\nversion = \"1.0.13\"\nauthors = [\"David Tolnay \"]\ncategories = [\"rust-patterns\", \"no-std\", \"no-std::no-alloc\"]\ndescription = \"Make trait methods callable without the trait in scope\"\ndocumentation = \"https://docs.rs/inherent\"\nedition = \"2021\"\nlicense = \"MIT OR Apache-2.0\"\nrepository = \"https://github.com/dtolnay/inherent\"\nrust-version = \"1.71\"\n\n[lib]\nproc-macro = true\n\n[dependencies]\nproc-macro2 = \"1.0.74\"\nquote = \"1.0.35\"\nsyn = { version = \"2.0.46\", features = [\"full\"] }\n\n[dev-dependencies]\nrustversion = \"1.0.13\"\ntrybuild = { version = \"1.0.108\", features = [\"diff\"] }\n\n[package.metadata.docs.rs]\ntargets = [\"x86_64-unknown-linux-gnu\"]\nrustdoc-args = [\n \"--generate-link-to-definition\",\n \"--generate-macro-expansion\",\n \"--extern-html-root-url=core=https://doc.rust-lang.org\",\n \"--extern-html-root-url=alloc=https://doc.rust-lang.org\",\n \"--extern-html-root-url=std=https://doc.rust-lang.org\",\n \"--extern-html-root-url=proc_macro=https://doc.rust-lang.org\",\n]\n" }, { "path": "LICENSE-APACHE", "content": " Apache License\n Version 2.0, January 2004\n http://www.apache.org/licenses/\n\nTERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n\n1. 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In no event and under no legal theory,\n whether in tort (including negligence), contract, or otherwise,\n unless required by applicable law (such as deliberate and grossly\n negligent acts) or agreed to in writing, shall any Contributor be\n liable to You for damages, including any direct, indirect, special,\n incidental, or consequential damages of any character arising as a\n result of this License or out of the use or inability to use the\n Work (including but not limited to damages for loss of goodwill,\n work stoppage, computer failure or malfunction, or any and all\n other commercial damages or losses), even if such Contributor\n has been advised of the possibility of such damages.\n\n9. Accepting Warranty or Additional Liability. While redistributing\n the Work or Derivative Works thereof, You may choose to offer,\n and charge a fee for, acceptance of support, warranty, indemnity,\n or other liability obligations and/or rights consistent with this\n License. However, in accepting such obligations, You may act only\n on Your own behalf and on Your sole responsibility, not on behalf\n of any other Contributor, and only if You agree to indemnify,\n defend, and hold each Contributor harmless for any liability\n incurred by, or claims asserted against, such Contributor by reason\n of your accepting any such warranty or additional liability.\n\nEND OF TERMS AND CONDITIONS\n" }, { "path": "LICENSE-MIT", "content": "Permission is hereby granted, free of charge, to any\nperson obtaining a copy of this software and associated\ndocumentation files (the \"Software\"), to deal in the\nSoftware without restriction, including without\nlimitation the rights to use, copy, modify, merge,\npublish, distribute, sublicense, and/or sell copies of\nthe Software, and to permit persons to whom the Software\nis furnished to do so, subject to the following\nconditions:\n\nThe above copyright notice and this permission notice\nshall be included in all copies or substantial portions\nof the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF\nANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED\nTO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A\nPARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT\nSHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY\nCLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION\nOF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR\nIN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER\nDEALINGS IN THE SOFTWARE.\n" }, { "path": "README.md", "content": "\\#\\[inherent\\]\n==============\n\n[\"github\"](https://github.com/dtolnay/inherent)\n[\"crates.io\"](https://crates.io/crates/inherent)\n[\"docs.rs\"](https://docs.rs/inherent)\n[\"build](https://github.com/dtolnay/inherent/actions?query=branch%3Amaster)\n\nThis crate provides an attribute macro to make trait methods callable without\nthe trait in scope.\n\n```toml\n[dependencies]\ninherent = \"1.0\"\n```\n\n## Example\n\n```rust\nmod types {\n use inherent::inherent;\n\n trait Trait {\n fn f(self);\n }\n\n pub struct Struct;\n\n #[inherent]\n impl Trait for Struct {\n pub fn f(self) {}\n }\n}\n\nfn main() {\n // types::Trait is not in scope, but method can be called.\n types::Struct.f();\n}\n```\n\nWithout the `inherent` macro on the trait impl, this would have failed with the\nfollowing error:\n\n```console\nerror[E0599]: no method named `f` found for type `types::Struct` in the current scope\n --> src/main.rs:18:19\n |\n8 | pub struct Struct;\n | ------------------ method `f` not found for this\n...\n18 | types::Struct.f();\n | ^\n |\n = help: items from traits can only be used if the trait is implemented and in scope\n = note: the following trait defines an item `f`, perhaps you need to implement it:\n candidate #1: `types::Trait`\n```\n\nThe `inherent` macro expands to inherent methods on the `Self` type of the trait\nimpl that forward to the trait methods. In the case above, the generated code\nwould be:\n\n```rust\nimpl Struct {\n pub fn f(self) {\n ::f(self)\n }\n}\n```\n\n
\n\n#### License\n\n\nLicensed under either of Apache License, Version\n2.0 or MIT license at your option.\n\n\n
\n\n\nUnless you explicitly state otherwise, any contribution intentionally submitted\nfor inclusion in this crate by you, as defined in the Apache-2.0 license, shall\nbe dual licensed as above, without any additional terms or conditions.\n\n" }, { "path": "src/expand.rs", "content": "use crate::parse::TraitImpl;\nuse crate::verbatim::VerbatimFn;\nuse proc_macro2::{Span, TokenStream};\nuse quote::{quote, quote_spanned};\nuse syn::{Attribute, FnArg, Ident, ImplItem, Pat, Path, Signature, Visibility};\n\npub fn inherent(mut input: TraitImpl) -> TokenStream {\n let impl_token = &input.impl_token;\n let generics = &input.generics;\n let where_clause = &input.generics.where_clause;\n let trait_ = &input.trait_;\n let ty = &input.self_ty;\n\n let fwd_methods: Vec<_> = input\n .items\n .iter()\n .filter_map(|item| match item {\n ImplItem::Fn(method) => Some(fwd_method(\n trait_,\n &method.attrs,\n &method.vis,\n &method.sig,\n method.block.brace_token.span.join(),\n )),\n ImplItem::Verbatim(tokens) => {\n if let Ok(method) = syn::parse2::(tokens.clone()) {\n Some(fwd_method(\n trait_,\n &method.attrs,\n &method.vis,\n &method.sig,\n method.semi_token.span,\n ))\n } else {\n None\n }\n }\n _ => None,\n })\n .collect();\n\n input.items = input\n .items\n .into_iter()\n .filter_map(|item| match item {\n ImplItem::Fn(mut method) => {\n method.vis = Visibility::Inherited;\n Some(ImplItem::Fn(method))\n }\n ImplItem::Verbatim(tokens) => {\n if syn::parse2::(tokens.clone()).is_ok() {\n None\n } else {\n Some(ImplItem::Verbatim(tokens))\n }\n }\n item => Some(item),\n })\n .collect();\n\n let body = quote_spanned!(input.brace_token.span=> { #(#fwd_methods)* });\n\n quote! {\n #impl_token #generics #ty #where_clause #body\n\n #input\n }\n}\n\nfn fwd_method(\n trait_: &Path,\n attrs: &[Attribute],\n vis: &Visibility,\n sig: &Signature,\n body_span: Span,\n) -> TokenStream {\n let constness = &sig.constness;\n let asyncness = &sig.asyncness;\n let unsafety = &sig.unsafety;\n let abi = &sig.abi;\n let fn_token = sig.fn_token;\n let ident = &sig.ident;\n let generics = &sig.generics;\n let output = &sig.output;\n let where_clause = &sig.generics.where_clause;\n\n let (arg_pat, arg_val): (Vec<_>, Vec<_>) = sig\n .inputs\n .pairs()\n .enumerate()\n .map(|(i, pair)| {\n let (input, comma_token) = pair.into_tuple();\n match input {\n FnArg::Receiver(receiver) => {\n let self_token = receiver.self_token;\n if receiver.reference.is_some() {\n (quote!(#receiver #comma_token), quote!(#self_token))\n } else {\n (quote!(#self_token #comma_token), quote!(#self_token))\n }\n }\n FnArg::Typed(arg) => {\n let var = match arg.pat.as_ref() {\n Pat::Ident(pat) => pat.ident.clone(),\n _ => Ident::new(&format!(\"__arg{}\", i), Span::call_site()),\n };\n let colon_token = arg.colon_token;\n let ty = &arg.ty;\n (quote!(#var #colon_token #ty #comma_token), quote!(#var))\n }\n }\n })\n .unzip();\n\n let types = generics.type_params().map(|param| ¶m.ident);\n let wait = asyncness.map(|_| quote!(.await));\n let body = quote!(::#ident::<#(#types,)*>(#(#arg_val,)*) #wait);\n let block = quote_spanned!(body_span=> { #body });\n let args = quote_spanned!(sig.paren_token.span=> (#(#arg_pat)*));\n\n let has_doc = attrs.iter().any(|attr| attr.path().is_ident(\"doc\"));\n let default_doc = if has_doc {\n None\n } else {\n let mut link = String::new();\n for segment in &trait_.segments {\n link += &segment.ident.to_string();\n link += \"::\";\n }\n let msg = format!(\"See [`{}{}`]\", link, ident);\n Some(quote!(#[doc = #msg]))\n };\n\n quote! {\n #(#attrs)*\n #default_doc\n #vis #constness #asyncness #unsafety #abi #fn_token #ident #generics #args #output #where_clause #block\n }\n}\n" }, { "path": "src/lib.rs", "content": "//! [![github]](https://github.com/dtolnay/inherent) [![crates-io]](https://crates.io/crates/inherent) [![docs-rs]](https://docs.rs/inherent)\n//!\n//! [github]: https://img.shields.io/badge/github-8da0cb?style=for-the-badge&labelColor=555555&logo=github\n//! [crates-io]: https://img.shields.io/badge/crates.io-fc8d62?style=for-the-badge&labelColor=555555&logo=rust\n//! [docs-rs]: https://img.shields.io/badge/docs.rs-66c2a5?style=for-the-badge&labelColor=555555&logo=docs.rs\n//!\n//!
\n//!\n//! ##### An attribute macro to make trait methods callable without the trait in scope.\n//!\n//! # Example\n//!\n//! ```rust\n//! mod types {\n//! use inherent::inherent;\n//!\n//! trait Trait {\n//! fn f(self);\n//! }\n//!\n//! pub struct Struct;\n//!\n//! #[inherent]\n//! impl Trait for Struct {\n//! pub fn f(self) {}\n//! }\n//! }\n//!\n//! fn main() {\n//! // types::Trait is not in scope, but method can be called.\n//! types::Struct.f();\n//! }\n//! ```\n//!\n//! Without the `inherent` macro on the trait impl, this would have failed with the\n//! following error:\n//!\n//! ```console\n//! error[E0599]: no method named `f` found for type `types::Struct` in the current scope\n//! --> src/main.rs:18:19\n//! |\n//! 8 | pub struct Struct;\n//! | ------------------ method `f` not found for this\n//! ...\n//! 18 | types::Struct.f();\n//! | ^\n//! |\n//! = help: items from traits can only be used if the trait is implemented and in scope\n//! = note: the following trait defines an item `f`, perhaps you need to implement it:\n//! candidate #1: `types::Trait`\n//! ```\n//!\n//! The `inherent` macro expands to inherent methods on the `Self` type of the trait\n//! impl that forward to the trait methods. In the case above, the generated code\n//! would be:\n//!\n//! ```rust\n//! # trait Trait {\n//! # fn f(self);\n//! # }\n//! #\n//! # pub struct Struct;\n//! #\n//! # impl Trait for Struct {\n//! # fn f(self) {}\n//! # }\n//! #\n//! impl Struct {\n//! pub fn f(self) {\n//! ::f(self)\n//! }\n//! }\n//! ```\n\n#![doc(html_root_url = \"https://docs.rs/inherent/1.0.13\")]\n#![allow(\n clippy::default_trait_access,\n clippy::module_name_repetitions,\n clippy::needless_doctest_main,\n clippy::needless_pass_by_value,\n clippy::uninlined_format_args\n)]\n\nextern crate proc_macro;\n\nmod expand;\nmod parse;\nmod verbatim;\n\nuse proc_macro::TokenStream;\nuse syn::parse::Nothing;\nuse syn::parse_macro_input;\n\nuse crate::parse::TraitImpl;\n\n#[proc_macro_attribute]\npub fn inherent(args: TokenStream, input: TokenStream) -> TokenStream {\n parse_macro_input!(args as Nothing);\n let input = parse_macro_input!(input as TraitImpl);\n expand::inherent(input).into()\n}\n" }, { "path": "src/parse.rs", "content": "use proc_macro2::{Span, TokenStream};\nuse quote::ToTokens;\nuse syn::parse::{Error, Parse, ParseStream, Result};\nuse syn::token::Brace;\nuse syn::{Attribute, Generics, ImplItem, ItemImpl, Path, Token, Type};\n\n#[derive(Clone)]\npub struct TraitImpl {\n pub attrs: Vec,\n pub defaultness: Option,\n pub unsafety: Option,\n pub impl_token: Token![impl],\n pub generics: Generics,\n pub trait_: Path,\n pub for_token: Token![for],\n pub self_ty: Type,\n pub brace_token: Brace,\n pub items: Vec,\n}\n\nimpl Parse for TraitImpl {\n fn parse(input: ParseStream) -> Result {\n let imp: ItemImpl = input.parse()?;\n\n let Some((_bang_token, trait_, for_token)) = imp.trait_ else {\n return Err(Error::new(\n Span::call_site(),\n \"must be placed on a trait impl\",\n ));\n };\n\n Ok(TraitImpl {\n attrs: imp.attrs,\n defaultness: imp.defaultness,\n unsafety: imp.unsafety,\n impl_token: imp.impl_token,\n generics: imp.generics,\n trait_,\n for_token,\n self_ty: *imp.self_ty,\n brace_token: imp.brace_token,\n items: imp.items,\n })\n }\n}\n\nimpl ToTokens for TraitImpl {\n fn to_tokens(&self, tokens: &mut TokenStream) {\n let imp = self.clone();\n\n ItemImpl::to_tokens(\n &ItemImpl {\n attrs: imp.attrs,\n defaultness: imp.defaultness,\n unsafety: imp.unsafety,\n impl_token: imp.impl_token,\n generics: imp.generics,\n trait_: Some((None, imp.trait_, imp.for_token)),\n self_ty: Box::new(imp.self_ty),\n brace_token: imp.brace_token,\n items: imp.items,\n },\n tokens,\n );\n }\n}\n" }, { "path": "src/verbatim.rs", "content": "use proc_macro2::TokenStream;\nuse quote::{ToTokens, TokenStreamExt};\nuse syn::parse::{Parse, ParseStream, Result};\nuse syn::{Attribute, Signature, Token, Visibility};\n\npub struct VerbatimFn {\n pub attrs: Vec,\n pub vis: Visibility,\n pub defaultness: Option,\n pub sig: Signature,\n pub semi_token: Token![;],\n}\n\nimpl Parse for VerbatimFn {\n fn parse(input: ParseStream) -> Result {\n Ok(VerbatimFn {\n attrs: input.call(Attribute::parse_outer)?,\n vis: input.parse()?,\n defaultness: input.parse()?,\n sig: input.parse()?,\n semi_token: input.parse()?,\n })\n }\n}\n\nimpl ToTokens for VerbatimFn {\n fn to_tokens(&self, tokens: &mut TokenStream) {\n tokens.append_all(&self.attrs);\n self.vis.to_tokens(tokens);\n self.defaultness.to_tokens(tokens);\n self.sig.to_tokens(tokens);\n self.semi_token.to_tokens(tokens);\n }\n}\n" }, { "path": "tests/compiletest.rs", "content": "#[rustversion::attr(not(nightly), ignore = \"requires nightly\")]\n#[cfg_attr(miri, ignore = \"incompatible with miri\")]\n#[test]\nfn ui() {\n let t = trybuild::TestCases::new();\n t.compile_fail(\"tests/ui/*.rs\");\n}\n" }, { "path": "tests/test.rs", "content": "mod types {\n use inherent::inherent;\n\n trait Trait {\n fn f(self);\n // A default method\n fn g(&self) {}\n\n #[rustversion::since(1.75)]\n async fn a(&self);\n }\n\n pub struct Struct;\n\n #[inherent]\n impl Trait for Struct {\n pub fn f(self) {}\n pub fn g(&self);\n\n #[rustversion::since(1.75)]\n pub async fn a(&self) {}\n }\n}\n\n#[test]\nfn test() {\n // types::Trait is not in scope.\n let s = types::Struct;\n s.g();\n s.f::();\n}\n\n#[rustversion::since(1.75)]\n#[test]\nfn test_async() {\n fn assert_future>(_: T) {}\n\n let s = types::Struct;\n assert_future(s.a());\n}\n" }, { "path": "tests/ui/associated-type.rs", "content": "use inherent::inherent;\n\npub trait Trait {\n type Assoc;\n fn f() -> Self::Assoc;\n}\n\npub struct Struct;\n\n#[inherent]\nimpl Trait for Struct {\n type Assoc = ();\n\n // TODO: https://github.com/dtolnay/inherent/issues/15\n fn f() -> Self::Assoc {}\n}\n\nfn main() {}\n" }, { "path": "tests/ui/associated-type.stderr", "content": "error[E0223]: ambiguous associated type\n --> tests/ui/associated-type.rs:15:15\n |\n15 | fn f() -> Self::Assoc {}\n | ^^^^^^^^^^^\n |\nhelp: use fully-qualified syntax\n |\n15 - fn f() -> Self::Assoc {}\n15 + fn f() -> ::Assoc {}\n |\n" }, { "path": "tests/ui/blanket-impl.rs", "content": "use inherent::inherent;\n\ntrait A {\n fn a(&self);\n}\n\n#[inherent]\nimpl A for T {\n fn a(&self) {}\n}\n\nfn main() {}\n" }, { "path": "tests/ui/blanket-impl.stderr", "content": "error[E0118]: no nominal type found for inherent implementation\n --> tests/ui/blanket-impl.rs:8:1\n |\n8 | impl A for T {\n | ^^^^^^^^^^^^^^^ impl requires a nominal type\n |\n = note: either implement a trait on it or create a newtype to wrap it instead\n" }, { "path": "tests/ui/not-trait-impl.rs", "content": "use inherent::inherent;\n\nstruct Struct;\n\n#[inherent]\nimpl Struct {\n fn f() {}\n}\n\nfn main() {}\n" }, { "path": "tests/ui/not-trait-impl.stderr", "content": "error: must be placed on a trait impl\n --> tests/ui/not-trait-impl.rs:5:1\n |\n5 | #[inherent]\n | ^^^^^^^^^^^\n |\n = note: this error originates in the attribute macro `inherent` (in Nightly builds, run with -Z macro-backtrace for more info)\n" }, { "path": "tests/ui/not-visible.rs", "content": "mod types {\n use inherent::inherent;\n\n trait Trait {\n fn f();\n }\n\n pub struct Struct;\n\n #[inherent]\n impl Trait for Struct {\n fn f() {}\n }\n}\n\nfn main() {\n types::Struct::f();\n}\n" }, { "path": "tests/ui/not-visible.stderr", "content": "error[E0624]: associated function `f` is private\n --> tests/ui/not-visible.rs:17:20\n |\n12 | fn f() {}\n | ------ private associated function defined here\n...\n17 | types::Struct::f();\n | ^ private associated function\n" } ]