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| author | dianne <diannes.gm@gmail.com> | 2024-09-16 20:20:46 -0700 |
|---|---|---|
| committer | nora <48135649+Noratrieb@users.noreply.github.com> | 2024-09-24 19:53:17 +0200 |
| commit | 9080dfe6ccaf358bb4ae0680cc4fdab0f67eeb9b (patch) | |
| tree | e0215b1d8d66c8bbc931a89acbb893efff755861 /src/doc/rustc-dev-guide | |
| parent | e1ff877fe4f569ca6a8e4d69506b3a67eafb8135 (diff) | |
| download | rust-9080dfe6ccaf358bb4ae0680cc4fdab0f67eeb9b.tar.gz rust-9080dfe6ccaf358bb4ae0680cc4fdab0f67eeb9b.zip | |
Document `#[rustc_default_body_unstable]`
Diffstat (limited to 'src/doc/rustc-dev-guide')
| -rw-r--r-- | src/doc/rustc-dev-guide/src/stability.md | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/doc/rustc-dev-guide/src/stability.md b/src/doc/rustc-dev-guide/src/stability.md index ac77ad3f1e3..444bef7af72 100644 --- a/src/doc/rustc-dev-guide/src/stability.md +++ b/src/doc/rustc-dev-guide/src/stability.md @@ -68,6 +68,16 @@ even on an `unstable` function, if that function is called from another Furthermore this attribute is needed to mark an intrinsic as callable from `rustc_const_stable` functions. +## rustc_default_body_unstable + +The `#[rustc_default_body_unstable(feature = "foo", issue = "1234", reason = +"lorem ipsum")]` attribute has the same interface as the `unstable` attribute. +It is used to mark the default implementation for an item within a trait as +unstable. +A trait with a default-body-unstable item can be implemented stably by providing +an explicit body for any such item, or the default body can be used by enabling +its corresponding `#![feature]`. + ## Stabilizing a library feature To stabilize a feature, follow these steps: |