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Tracking Issue for LocalKey<Cell>::update #143989
Description
Feature gate: #![feature(local_key_cell_update)]
This is a tracking issue for adding LocalKey::<Cell<T>>::update, similar to other LocalKey::<Cell<T>> methods.
Public API
impl<T: 'static> LocalKey<Cell<T>> {
pub fn update(&'static self, f: impl FnOnce(T) -> T) where T: Copy;
}Steps / History
(Remember to update the S-tracking-* label when checking boxes.)
- Implementation: Add LocalKey<Cell>::update #143990
- Final comment period (FCP)1
- Stabilization PR
Unresolved Questions
- None yet.
Activity
Rollup merge of rust-lang#143990 - camsteffen:localkey-cell, r=tgross35
Rollup merge of rust-lang#143990 - camsteffen:localkey-cell, r=tgross35
Unrolled build for #143990
Rollup merge of #143990 - camsteffen:localkey-cell, r=tgross35
Rollup merge of rust-lang#143990 - camsteffen:localkey-cell, r=tgross35
Rollup merge of rust-lang#143990 - camsteffen:localkey-cell, r=tgross35
pthariensflame commentedon Jan 19, 2026
Is this ready to be stabilized? We don't see any outstanding concerns, or indeed any questions about this API’s shape or behavior.
tgross35 commentedon Jun 11, 2026
Stabilization PR #157734
Amanieu commentedon Jun 16, 2026
@rfcbot merge libs-api
rust-rfcbot commentedon Jun 16, 2026
@Amanieu has proposed to merge this. The next step is review by the rest of the tagged team members:
No concerns currently listed.
Once a majority of reviewers approve (and at most 2 approvals are outstanding), this will enter its final comment period. If you spot a major issue that hasn't been raised at any point in this process, please speak up!
See this document for info about what commands tagged team members can give me.
rust-rfcbot commentedon Jun 25, 2026
🔔 This is now entering its final comment period, as per the review above. 🔔
rust-rfcbot commentedon Jul 5, 2026
The final comment period, with a disposition to merge, as per the review above, is now complete.
As the automated representative of the governance process, I would like to thank the author for their work and everyone else who contributed.