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| author | Stuart Cook <Zalathar@users.noreply.github.com> | 2025-08-12 20:37:55 +1000 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2025-08-12 20:37:55 +1000 |
| commit | 42af95b18e6ad480d72d6bffe71ff9063fc9b6de (patch) | |
| tree | 814c2e9659e06966d8b7c24f0e5abe4e51f37544 /src/doc | |
| parent | 769d32b117ee007b8872b7de3752ac7a6a64c05d (diff) | |
| parent | bcf87e4172416b96e24be998e18d81a8af183356 (diff) | |
Rollup merge of #145251 - tiif:support_trait, r=BoxyUwU
Support using #[unstable_feature_bound] on trait This is needed to unblock https://github.com/rust-lang/rust/pull/145095 r? ```````@BoxyUwU```````
Diffstat (limited to 'src/doc')
| -rw-r--r-- | src/doc/rustc-dev-guide/src/stability.md | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/doc/rustc-dev-guide/src/stability.md b/src/doc/rustc-dev-guide/src/stability.md index c26d34273d7..3c4c65fdd5a 100644 --- a/src/doc/rustc-dev-guide/src/stability.md +++ b/src/doc/rustc-dev-guide/src/stability.md @@ -182,6 +182,11 @@ of the standard library raises it to a warning with `#![warn(deprecated_in_future)]`. ## unstable_feature_bound -The `#[unstable_feature_bound(foo)]` attribute can be used together with `#[unstable]` attribute to mark an `impl` of stable type and stable trait as unstable. In std/core, an item annotated with `#[unstable_feature_bound(foo)]` can only be used by another item that is also annotated with `#[unstable_feature_bound(foo)]`. Outside of std/core, using an item with `#[unstable_feature_bound(foo)]` requires the feature to be enabled with `#![feature(foo)]` attribute on the crate. Currently, only `impl`s and free functions can be annotated with `#[unstable_feature_bound]`. +The `#[unstable_feature_bound(foo)]` attribute can be used together with `#[unstable]` attribute to mark an `impl` of stable type and stable trait as unstable. In std/core, an item annotated with `#[unstable_feature_bound(foo)]` can only be used by another item that is also annotated with `#[unstable_feature_bound(foo)]`. Outside of std/core, using an item with `#[unstable_feature_bound(foo)]` requires the feature to be enabled with `#![feature(foo)]` attribute on the crate. + +Currently, the items that can be annotated with `#[unstable_feature_bound]` are: +- `impl` +- free function +- trait [blog]: https://www.ralfj.de/blog/2018/07/19/const.html |