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Tracking Issue for const_bool #151531
Description
Feature gate: #![feature(const_bool)]
This is a tracking issue for constified boolean methods.
Public API
// core::bool
impl bool {
pub const fn then_some<T: [const] Destruct>(self, t: T) -> Option<T>;
pub const fn then<T, F: [const] FnOnce() -> T + [const] Destruct>(self, f: F) -> Option<T>;
pub const fn ok_or<E: [const] Destruct>(self, err: E) -> Result<(), E>;
pub const fn ok_or_else<E, F: [const] FnOnce() -> E + [const] Destruct>;
}Steps / History
(Remember to update the S-tracking-* label when checking boxes.)
- Implementation: constify boolean methods #151489
- Final comment period (FCP)1
- Stabilization PR
Unresolved Questions
- None yet.
Activity
akhilamalakota commentedon Jan 24, 2026
I'd like to work on it!
SpriteOvO commentedon Jan 24, 2026
Hi @akhilamalakota, the implementation of this feature gate has been merged, and no further work needs to be done here. Since its implementation was merged shortly ago, it will take some time before stabilizing it. You can try them out in nightly channel and open an issue if you discover any potential problems -- this is what needs to be done before stabilizing them.
Chore: restrict visibility and constify