Tracking issue for const `Pin` methods #76654

CDirkx · 2020-09-12T23:30:09Z

Constify methods of core::pin::Pin under the feature const_pin.

Implementation: #76655

Methods in const_pin (stable since #130136):

new
new_unchecked
get_ref
into_ref
get_mut
get_unchecked_mut
static_ref
static_mut

Methods in const_pin2:

into_inner
into_inner_unchecked

The const_pin2 methods will need #[rustc_allow_const_fn_unstable(const_precise_live_drops)] but that has been approved here.

The text was updated successfully, but these errors were encountered:

Make the following methods unstable const under the `const_pin` feature: - `new` - `new_unchecked` - `into_inner` - `into_inner_unchecked` - `get_ref` - `into_ref` Also adds tests for these methods in a const context. Tracking issue: rust-lang#76654

ecstatic-morse · 2020-09-13T00:48:07Z

As you mention in #76655 PR, the implementation of some of these methods depends on the unstable const_precise_live_drops feature. Future readers should check the status of that feature before attempting to stabilize these. #76618 will ensure that this does not happen by accident.

@ecstatic-morse

Make some methods of `Pin` unstable const Make the following methods unstable const under the `const_pin` feature: - `new` - `new_unchecked` - `into_inner` - `into_inner_unchecked` - `get_ref` - `into_ref` - `get_mut` - `get_unchecked_mut` Of these, `into_inner` and `into_inner_unchecked` require the unstable `const_precise_live_drops`. Also adds tests for these methods in a const context. Tracking issue: rust-lang#76654 r? @ecstatic-morse

@ecstatic-morse

Make some methods of `Pin` unstable const Make the following methods unstable const under the `const_pin` feature: - `new` - `new_unchecked` - `into_inner` - `into_inner_unchecked` - `get_ref` - `into_ref` - `get_mut` - `get_unchecked_mut` Of these, `into_inner` and `into_inner_unchecked` require the unstable `const_precise_live_drops`. Also adds tests for these methods in a const context. Tracking issue: rust-lang#76654 r? @ecstatic-morse

@ecstatic-morse

Make some methods of `Pin` unstable const Make the following methods unstable const under the `const_pin` feature: - `new` - `new_unchecked` - `into_inner` - `into_inner_unchecked` - `get_ref` - `into_ref` - `get_mut` - `get_unchecked_mut` Of these, `into_inner` and `into_inner_unchecked` require the unstable `const_precise_live_drops`. Also adds tests for these methods in a const context. Tracking issue: rust-lang#76654 r? @ecstatic-morse

@ecstatic-morse

Make some methods of `Pin` unstable const Make the following methods unstable const under the `const_pin` feature: - `new` - `new_unchecked` - `into_inner` - `into_inner_unchecked` - `get_ref` - `into_ref` - `get_mut` - `get_unchecked_mut` Of these, `into_inner` and `into_inner_unchecked` require the unstable `const_precise_live_drops`. Also adds tests for these methods in a const context. Tracking issue: rust-lang#76654 r? @ecstatic-morse

@ecstatic-morse

Make some methods of `Pin` unstable const Make the following methods unstable const under the `const_pin` feature: - `new` - `new_unchecked` - `into_inner` - `into_inner_unchecked` - `get_ref` - `into_ref` - `get_mut` - `get_unchecked_mut` Of these, `into_inner` and `into_inner_unchecked` require the unstable `const_precise_live_drops`. Also adds tests for these methods in a const context. Tracking issue: rust-lang#76654 r? @ecstatic-morse

@ecstatic-morse

Make some methods of `Pin` unstable const Make the following methods unstable const under the `const_pin` feature: - `new` - `new_unchecked` - `into_inner` - `into_inner_unchecked` - `get_ref` - `into_ref` - `get_mut` - `get_unchecked_mut` Of these, `into_inner` and `into_inner_unchecked` require the unstable `const_precise_live_drops`. Also adds tests for these methods in a const context. Tracking issue: rust-lang#76654 r? @ecstatic-morse

@ecstatic-morse

Make some methods of `Pin` unstable const Make the following methods unstable const under the `const_pin` feature: - `new` - `new_unchecked` - `into_inner` - `into_inner_unchecked` - `get_ref` - `into_ref` - `get_mut` - `get_unchecked_mut` Of these, `into_inner` and `into_inner_unchecked` require the unstable `const_precise_live_drops`. Also adds tests for these methods in a const context. Tracking issue: rust-lang#76654 r? @ecstatic-morse

@ecstatic-morse

Make some methods of `Pin` unstable const Make the following methods unstable const under the `const_pin` feature: - `new` - `new_unchecked` - `into_inner` - `into_inner_unchecked` - `get_ref` - `into_ref` - `get_mut` - `get_unchecked_mut` Of these, `into_inner` and `into_inner_unchecked` require the unstable `const_precise_live_drops`. Also adds tests for these methods in a const context. Tracking issue: rust-lang#76654 r? @ecstatic-morse

@ecstatic-morse

Make some methods of `Pin` unstable const Make the following methods unstable const under the `const_pin` feature: - `new` - `new_unchecked` - `into_inner` - `into_inner_unchecked` - `get_ref` - `into_ref` - `get_mut` - `get_unchecked_mut` Of these, `into_inner` and `into_inner_unchecked` require the unstable `const_precise_live_drops`. Also adds tests for these methods in a const context. Tracking issue: rust-lang#76654 r? @ecstatic-morse

Partially stabilize const_pin Tracking issue rust-lang#76654. Eight of these methods can be made const-stable. The remainder are blocked on rust-lang#73255.

Rollup merge of rust-lang#130136 - GKFX:stabilize-const-pin, r=dtolnay Partially stabilize const_pin Tracking issue rust-lang#76654. Eight of these methods can be made const-stable. The remainder are blocked on rust-lang#73255.

RalfJung · 2024-10-18T13:45:57Z

@dtolnay wrote

I'd be happy to take a separate PR for the const-stabilizing of into_inner + into_inner_unchecked. Procedurally I think a fresh FCP would be required.

So, let's get that train rolling -- @rust-lang/libs-api can we const-stabilize the const_pin2 feature gate, which guards Pin::into_inner and Pin::into_inner_unchecked (already stable outside const)?

dtolnay · 2024-10-18T14:29:12Z

@rfcbot fcp merge

rfcbot · 2024-10-18T14:29:14Z

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.

tgross35 · 2024-10-18T16:43:30Z

can we const-stabilize the const_pin2 feature gate, which guards Pin::into_inner and Pin::into_inner_unchecked

Since this will likely be the same release cycle, the const_pin2 items can probably just be grouped back into const_pin.

tgross35 · 2024-11-06T22:54:07Z

@Amanieu @BurntSushi @m-ou-se could this get one more check? So we avoid splitting const_pin if fcp doesn't make the next branch.

rfcbot · 2024-11-06T23:35:25Z

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

rfcbot · 2024-11-16T23:38:47Z

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.

RalfJung · 2024-11-17T07:11:38Z

Stabilization PR is up at #133127

…ss35 Stabilize const_pin_2 Tracking issue rust-lang#76654; review before FCP in progress.

Rollup merge of rust-lang#131904 - GKFX:stabilize-const-pin-2, r=tgross35 Stabilize const_pin_2 Tracking issue rust-lang#76654; review before FCP in progress.

RalfJung · 2024-12-26T08:21:34Z

This got closed by #131904

CDirkx mentioned this issue Sep 12, 2020

Make some methods of Pin unstable const #76655

Merged

jyn514 added A-const-fn T-libs-api Relevant to the library API team, which will review and decide on the PR/issue. labels Sep 13, 2020

CDirkx mentioned this issue Feb 15, 2021

Make some Option, Result methods unstably const #82130

Merged

inquisitivecrystal mentioned this issue Jul 29, 2021

Tracking issue for #![feature(const_precise_live_drops)] #73255

Open

1 task

GKFX mentioned this issue Sep 9, 2024

Partially stabilize const_pin #130136

Merged

RalfJung added the I-libs-api-nominated Nominated for discussion during a libs-api team meeting. label Oct 18, 2024

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 Oct 18, 2024

dtolnay removed the I-libs-api-nominated Nominated for discussion during a libs-api team meeting. label Oct 18, 2024

GKFX mentioned this issue Oct 18, 2024

Stabilize const_pin_2 #131904

Merged

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 Nov 6, 2024

rfcbot added finished-final-comment-period The final comment period is finished for this PR / Issue. and removed final-comment-period In the final comment period and will be merged soon unless new substantive objections are raised. labels Nov 16, 2024

rfcbot added the to-announce Announce this issue on triage meeting label Nov 16, 2024

rustbot mentioned this issue Nov 16, 2024

Tracking issue for release notes of #76654: Tracking issue for const Pin methods #133124

Closed

3 tasks

RalfJung mentioned this issue Nov 17, 2024

stabilize const_pin_2 #133127

Closed

matthiaskrgr added a commit to matthiaskrgr/rust that referenced this issue Nov 20, 2024

Rollup merge of rust-lang#131904 - GKFX:stabilize-const-pin-2, r=tgro…

2595118

…ss35 Stabilize const_pin_2 Tracking issue rust-lang#76654; review before FCP in progress.

rust-timer added a commit to rust-lang-ci/rust that referenced this issue Nov 20, 2024

Unrolled build for rust-lang#131904

d982e04

Rollup merge of rust-lang#131904 - GKFX:stabilize-const-pin-2, r=tgross35 Stabilize const_pin_2 Tracking issue rust-lang#76654; review before FCP in progress.

apiraino removed the to-announce Announce this issue on triage meeting label Nov 21, 2024

RalfJung added A-const-eval Area: Constant evaluation, covers all const contexts (static, const fn, ...) and removed A-const-fn labels Dec 1, 2024

RalfJung closed this as completed Dec 26, 2024

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Tracking issue for const `Pin` methods #76654

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Tracking issue for const Pin methods #76654

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Tracking issue for const `Pin` methods #76654

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