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authorTrevor Gross <t.gross35@gmail.com>2025-05-27 20:28:30 -0400
committerGitHub <noreply@github.com>2025-05-27 20:28:30 -0400
commit0c2fbe53a69ae8e3b0b779fe5e05aacb0edd7143 (patch)
tree719bafffe8ca267e78c166b692b8772f8d01a6db /compiler/rustc_codegen_gcc/example/alloc_example.rs
parent743d2527a26f3d92f82614f303a5b76c28366109 (diff)
parent3fd0265fbb236c8309f2f913cf9946e64818f643 (diff)
downloadrust-0c2fbe53a69ae8e3b0b779fe5e05aacb0edd7143.tar.gz
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Rollup merge of #140894 - Urgau:check-cfg-rustdoc, r=GuillaumeGomez
Make check-cfg diagnostics work in `#[doc(cfg(..))]`

This PR makes it so that the check-cfg `unexpected_cfgs` lint, is correctly emitted in `rustdoc`'s `#[doc(cfg(..))]`.

This is achieved by adding a custom trait to `cfg_matches` (the method that emits the lint) which permits `rustc` and `rustdoc` to each have their way to emitting lints (via buffered lints/AST for `rustc` and via `TyCtxt`/HIR for `rustdoc`).

The reason this is required is because buffered lints operates on the AST but `rustdoc` uses the HIR and by the time `rustdoc` calls `cfg_matches` we are way passed the point where buffered lints have been drain and emitted.

Best reviewed commit by commit.

r? `@jieyouxu` (for the compiler part)
r? `@GuillaumeGomez` (for the rustdoc part)
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