Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

clarify the role of rustc_const_unstable #2045

Merged
merged 1 commit into from
Aug 31, 2024
Merged

clarify the role of rustc_const_unstable #2045

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
10 changes: 5 additions & 5 deletions src/stability.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -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.
Expand Down