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| author | Ralf Jung <post@ralfj.de> | 2024-08-22 16:40:33 +0200 |
|---|---|---|
| committer | Oli Scherer <github35764891676564198441@oli-obk.de> | 2024-08-31 15:02:08 +0200 |
| commit | dcdf1b578ff037e1f6cdfb63e51452246ddbd367 (patch) | |
| tree | c25e72a5c289b232b2cc0560df3aa1c27f5a21aa /src/doc/rustc-dev-guide | |
| parent | 894ceda9574dd2a7a902b80ba462a568cbbb3b48 (diff) | |
| download | rust-dcdf1b578ff037e1f6cdfb63e51452246ddbd367.tar.gz rust-dcdf1b578ff037e1f6cdfb63e51452246ddbd367.zip | |
clarify the role of rustc_const_unstable
Diffstat (limited to 'src/doc/rustc-dev-guide')
| -rw-r--r-- | src/doc/rustc-dev-guide/src/stability.md | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/src/doc/rustc-dev-guide/src/stability.md b/src/doc/rustc-dev-guide/src/stability.md index bf82d85172d..ac77ad3f1e3 100644 --- a/src/doc/rustc-dev-guide/src/stability.md +++ b/src/doc/rustc-dev-guide/src/stability.md @@ -49,11 +49,11 @@ marks an item as stabilized. Note that stable functions may use unstable things ## rustc_const_unstable -The `#[rustc_const_unstable(feature = "foo", issue = "1234", reason = "lorem ipsum")]` -has the same interface as the `unstable` attribute. It is used to mark -`const fn` as having their constness be unstable. This allows you to make a -function stable without stabilizing its constness or even just marking an existing -stable function as `const fn` without instantly stabilizing the `const fn`ness. +The `#[rustc_const_unstable(feature = "foo", issue = "1234", reason = "lorem +ipsum")]` has the same interface as the `unstable` attribute. It is used to mark +`const fn` as having their constness be unstable. Every `const fn` with +stability attributes should carry either this attribute or +`#[rustc_const_stable]` (see below). Furthermore this attribute is needed to mark an intrinsic as `const fn`, because there's no way to add `const` to functions in `extern` blocks for now. |