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| author | bors <bors@rust-lang.org> | 2024-09-22 10:18:59 +0000 |
|---|---|---|
| committer | bors <bors@rust-lang.org> | 2024-09-22 10:18:59 +0000 |
| commit | 4ae36d906f7f509e63aaa7ea99fdbefd1463eb96 (patch) | |
| tree | d6ab8fa100c8469e3416ea9e74f178772571d727 /compiler/rustc_feature/src | |
| parent | 80aa6fa7314bddcfe95a68f4eb426b296bfdf4a9 (diff) | |
| parent | 8103505a4d9bcef3eb5715a41cc0eb08d92c05d5 (diff) | |
| download | rust-4ae36d906f7f509e63aaa7ea99fdbefd1463eb96.tar.gz rust-4ae36d906f7f509e63aaa7ea99fdbefd1463eb96.zip | |
Auto merge of #130689 - RalfJung:rustc_nonnull_optimization_guaranteed, r=jieyouxu
fix rustc_nonnull_optimization_guaranteed docs As far as I can tell, even back when this was [added](https://github.com/rust-lang/rust/pull/60300) it never *enabled* any optimizations. It just indicates that the FFI compat lint should accept those types for NPO.
Diffstat (limited to 'compiler/rustc_feature/src')
| -rw-r--r-- | compiler/rustc_feature/src/builtin_attrs.rs | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/compiler/rustc_feature/src/builtin_attrs.rs b/compiler/rustc_feature/src/builtin_attrs.rs index fa5f152132a..efb582fde1b 100644 --- a/compiler/rustc_feature/src/builtin_attrs.rs +++ b/compiler/rustc_feature/src/builtin_attrs.rs @@ -859,8 +859,10 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ rustc_attr!( rustc_nonnull_optimization_guaranteed, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::Yes, - "the `#[rustc_nonnull_optimization_guaranteed]` attribute is just used to enable \ - niche optimizations in libcore and libstd and will never be stable", + "the `#[rustc_nonnull_optimization_guaranteed]` attribute is just used to document \ + guaranteed niche optimizations in libcore and libstd and will never be stable\n\ + (note that the compiler does not even check whether the type indeed is being non-null-optimized; \ + it is your responsibility to ensure that the attribute is only used on types that are optimized)", ), // ========================================================================== |