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Tracking Issue for #![feature(const_unsafecell_get_mut)] #88836

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WaffleLapkin opened this issue Sep 10, 2021 · 8 comments · Fixed by #131177
Closed
1 of 3 tasks

Tracking Issue for #![feature(const_unsafecell_get_mut)] #88836

WaffleLapkin opened this issue Sep 10, 2021 · 8 comments · Fixed by #131177
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C-tracking-issue Category: A tracking issue for an RFC or an unstable feature. disposition-merge This issue / PR is in PFCP or FCP with a disposition to merge it. finished-final-comment-period The final comment period is finished for this PR / Issue. T-libs-api Relevant to the library API team, which will review and decide on the PR/issue.

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@WaffleLapkin
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Feature gate: #![feature(const_unsafecell_get_mut)]

This is a tracking issue for UnsafeCell::get_mut as a const fn.

Public API

// core::cell

impl<T> UnsafeCell<T> {
    pub const fn get_mut(&mut self) -> &mut T;
}

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Unresolved Questions

  • None yet.
@WaffleLapkin WaffleLapkin added C-tracking-issue Category: A tracking issue for an RFC or an unstable feature. T-libs-api Relevant to the library API team, which will review and decide on the PR/issue. labels Sep 10, 2021
@RalfJung
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Cc @rust-lang/wg-const-eval

@tgross35
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This is blocked on #57349, correct?

@RalfJung
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Yeah, pretty much all the mutable reference/pointer stuff in const is blocked on that.

@workingjubilee workingjubilee added the I-libs-api-nominated Nominated for discussion during a libs-api team meeting. label Sep 19, 2024
@workingjubilee
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etc. etc. #57349 landed now let's see if we have consensus for stabilizing this?

@dtolnay
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dtolnay commented Sep 19, 2024

@rfcbot fcp merge

const for https://doc.rust-lang.org/nightly/std/cell/struct.UnsafeCell.html#method.get_mut

@rfcbot
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rfcbot commented Sep 19, 2024 •
edited by Amanieu
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Team member @dtolnay 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.

@rfcbot rfcbot added proposed-final-comment-period Proposed to merge/close by relevant subteam, see T-<team> label. Will enter FCP once signed off. disposition-merge This issue / PR is in PFCP or FCP with a disposition to merge it. labels Sep 19, 2024
@dtolnay dtolnay removed the I-libs-api-nominated Nominated for discussion during a libs-api team meeting. label Sep 19, 2024
@workingjubilee workingjubilee mentioned this issue Sep 19, 2024
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@rfcbot rfcbot added final-comment-period In the final comment period and will be merged soon unless new substantive objections are raised. and removed proposed-final-comment-period Proposed to merge/close by relevant subteam, see T-<team> label. Will enter FCP once signed off. labels Sep 24, 2024
@rfcbot
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rfcbot commented Sep 24, 2024

🔔 This is now entering its final comment period, as per the review above. 🔔

This was referenced Sep 27, 2024
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@rfcbot rfcbot added finished-final-comment-period The final comment period is finished for this PR / Issue. to-announce Announce this issue on triage meeting and removed final-comment-period In the final comment period and will be merged soon unless new substantive objections are raised. labels Oct 4, 2024
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rfcbot commented Oct 4, 2024

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.

This will be merged soon.

@rustbot rustbot mentioned this issue Oct 4, 2024
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workingjubilee added a commit to workingjubilee/rustc that referenced this issue Oct 4, 2024
@workingjubilee
Rollup merge of rust-lang#131177 - workingjubilee:stabilize-const-mut…
cf2a713 
…-referees, r=tgross35

 Stabilize 5 `const_mut_refs`-dependent API

Since `const_mut_refs` and `const_refs_to_cell` have been stabilized, we now may create mutable references inside our library API. Thus we now stabilize the `const fn` version of these public library APIs which required such in their implementation:
- const `NonNull::as_mut` rust-lang#91822 (comment)
- const `slice::{first,last}_mut`: rust-lang#83570 (comment)
- const `str::as_{mut_ptr,bytes_mut}`: rust-lang#130086 (comment)
- const `str::from_utf8_unchecked_mut`: rust-lang#91005 (comment)
- const `UnsafeCell::get_mut`: rust-lang#88836 (comment)
workingjubilee added a commit to workingjubilee/rustc that referenced this issue Oct 4, 2024
@workingjubilee
Rollup merge of rust-lang#131177 - workingjubilee:stabilize-const-mut…
899543c 
…-referees, r=tgross35

 Stabilize 5 `const_mut_refs`-dependent API

Since `const_mut_refs` and `const_refs_to_cell` have been stabilized, we now may create mutable references inside our library API. Thus we now stabilize the `const fn` version of these public library APIs which required such in their implementation:
- const `NonNull::as_mut` rust-lang#91822 (comment)
- const `slice::{first,last}_mut`: rust-lang#83570 (comment)
- const `str::as_{mut_ptr,bytes_mut}`: rust-lang#130086 (comment)
- const `str::from_utf8_unchecked_mut`: rust-lang#91005 (comment)
- const `UnsafeCell::get_mut`: rust-lang#88836 (comment)
workingjubilee added a commit to workingjubilee/rustc that referenced this issue Oct 4, 2024
@workingjubilee
Rollup merge of rust-lang#131177 - workingjubilee:stabilize-const-mut…
882d660 
…-referees, r=tgross35

 Stabilize 5 `const_mut_refs`-dependent API

Since `const_mut_refs` and `const_refs_to_cell` have been stabilized, we now may create mutable references inside our library API. Thus we now stabilize the `const fn` version of these public library APIs which required such in their implementation:
- const `NonNull::as_mut` rust-lang#91822 (comment)
- const `slice::{first,last}_mut`: rust-lang#83570 (comment)
- const `str::as_{mut_ptr,bytes_mut}`: rust-lang#130086 (comment)
- const `str::from_utf8_unchecked_mut`: rust-lang#91005 (comment)
- const `UnsafeCell::get_mut`: rust-lang#88836 (comment)
rust-timer added a commit to rust-lang-ci/rust that referenced this issue Oct 5, 2024
@rust-timer
Unrolled build for rust-lang#131177
78312b9 
Rollup merge of rust-lang#131177 - workingjubilee:stabilize-const-mut-referees, r=tgross35

 Stabilize 5 `const_mut_refs`-dependent API

Since `const_mut_refs` and `const_refs_to_cell` have been stabilized, we now may create mutable references inside our library API. Thus we now stabilize the `const fn` version of these public library APIs which required such in their implementation:
- const `NonNull::as_mut` rust-lang#91822 (comment)
- const `slice::{first,last}_mut`: rust-lang#83570 (comment)
- const `str::as_{mut_ptr,bytes_mut}`: rust-lang#130086 (comment)
- const `str::from_utf8_unchecked_mut`: rust-lang#91005 (comment)
- const `UnsafeCell::get_mut`: rust-lang#88836 (comment)
@apiraino apiraino removed the to-announce Announce this issue on triage meeting label Oct 17, 2024
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Stabilize 5 const_mut_refs-dependent API workingjubilee/rustc
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@RalfJung @dtolnay @apiraino @tgross35 @rfcbot @WaffleLapkin @workingjubilee