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Merged
merged 1 commit into from
Apr 24, 2025
Merged

Stabilize the cell_update feature #134446

merged 1 commit into from
Apr 24, 2025
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tgross35
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@tgross35 tgross35 commented Dec 18, 2024 •
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Included API:

impl<T: Copy> Cell<T> {
    pub fn update(&self, f: impl FnOnce(T) -> T);
}

FCP completed once at #50186 (comment) but the signature has since changed.

Closes: #50186

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rustbot commented Dec 18, 2024

r? @workingjubilee

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@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels Dec 18, 2024
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rustbot commented Dec 18, 2024

The Miri subtree was changed

cc @rust-lang/miri

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There was some continued discussion on the thread after FCP started. I don't think anything changed, but I'll request libs-api take a look to double check.

r? libs-api

@rustbot rustbot added the T-libs-api Relevant to the library API team, which will review and decide on the PR/issue. label Dec 18, 2024
@rustbot rustbot assigned m-ou-se and unassigned workingjubilee Dec 18, 2024
@tgross35 tgross35 removed the T-libs Relevant to the library team, which will review and decide on the PR/issue. label Dec 18, 2024
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Should we maybe change the signature from

    pub fn update<F>(&self, f: F) -> T
    where
        F: FnOnce(T) -> T,

to

    pub fn update(&self, f: impl FnOnce(T) -> T) -> T

analogous to #135956?

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bors commented Jan 27, 2025

☔ The latest upstream changes (presumably #135937) made this pull request unmergeable. Please resolve the merge conflicts.

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tgross35 commented Mar 6, 2025

Nominating for libs-api to:

  1. Double check that the ~10 messages on the tracking issue since FCP started don't change any feelings about this API. The main discussion point is name and return value (old or new)
  2. Consider the signature change proposed above

@rustbot label +I-libs-api-nominated

@rustbot rustbot added the I-libs-api-nominated Nominated for discussion during a libs-api team meeting. label Mar 6, 2025
@m-ou-se m-ou-se added S-waiting-on-team Status: Awaiting decision from the relevant subteam (see the T-<team> label). and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Mar 18, 2025
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Amanieu commented Apr 1, 2025

We discussed this in the @rust-lang/libs-api meeting last week and the conclusion was that:

  • We agree that the signature should use impl FnOnce instead of a generic parameter.
  • We think that update should not return a value. The rationale is that the semantics wouldn't be clear otherwise, and the value in the cell is Copy anyways so you can just call .get() before or after the update, which will result in clearer code.

Once those changes are made we will re-start the FCP for stabilization.

@Amanieu Amanieu removed the I-libs-api-nominated Nominated for discussion during a libs-api team meeting. label Apr 1, 2025
@tgross35 tgross35 force-pushed the stabilize-cell_update branch from 6957c85 to db8f5eb Compare April 2, 2025 18:10
tgross35 added a commit to tgross35/rust that referenced this pull request Apr 2, 2025
@tgross35
Apply requested API changes to cell_update
072aa9e 
Do the following:

* Switch to `impl FnOnce` rather than a generic `F`.
* Change `update` to return nothing.

This was discussed at a libs-api meeting [1].

Tracking issue: rust-lang#50186

[1]: rust-lang#134446 (comment)
@tgross35 tgross35 mentioned this pull request Apr 2, 2025
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tgross35 commented Apr 2, 2025

Thanks for taking a look. I'll leave this PR for stabilization only, API updates are in #139273.

m-ou-se added a commit to m-ou-se/rust that referenced this pull request Apr 3, 2025
@m-ou-se
Rollup merge of rust-lang#139273 - tgross35:cell-update-changes, r=jh…
4ea55c7 
…pratt

Apply requested API changes to `cell_update`

Do the following:

* Switch to `impl FnOnce` rather than a generic `F`.
* Change `update` to return nothing.

This was discussed at a libs-api meeting [1].

Tracking issue: rust-lang#50186

[1]: rust-lang#134446 (comment)
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Apr 3, 2025
@matthiaskrgr
Rollup merge of rust-lang#139273 - tgross35:cell-update-changes, r=jh…
184e4ba 
…pratt

Apply requested API changes to `cell_update`

Do the following:

* Switch to `impl FnOnce` rather than a generic `F`.
* Change `update` to return nothing.

This was discussed at a libs-api meeting [1].

Tracking issue: rust-lang#50186

[1]: rust-lang#134446 (comment)
rust-timer added a commit to rust-lang-ci/rust that referenced this pull request Apr 3, 2025
@rust-timer
Unrolled build for rust-lang#139273
7bac055 
Rollup merge of rust-lang#139273 - tgross35:cell-update-changes, r=jhpratt

Apply requested API changes to `cell_update`

Do the following:

* Switch to `impl FnOnce` rather than a generic `F`.
* Change `update` to return nothing.

This was discussed at a libs-api meeting [1].

Tracking issue: rust-lang#50186

[1]: rust-lang#134446 (comment)
@tgross35
Stabilize the cell_update feature
ac34a6f 
Included API:

    impl<T: Copy> Cell<T> {
        pub fn update(&self, f: impl FnOnce(T) -> T);
    }

Closes: rust-lang#50186
@tgross35 tgross35 force-pushed the stabilize-cell_update branch from db8f5eb to ac34a6f Compare April 3, 2025 19:21
@tgross35 tgross35 added the needs-fcp This change is insta-stable, so needs a completed FCP to proceed. label Apr 3, 2025
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tgross35 commented Apr 3, 2025

@Amanieu this should be ready for FCP now.

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Amanieu commented Apr 6, 2025

@rfcbot merge

@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. 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 Apr 6, 2025
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rfcbot commented Apr 6, 2025

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

@tgross35 tgross35 mentioned this pull request Apr 7, 2025
Closed
github-actions bot pushed a commit to model-checking/verify-rust-std that referenced this pull request Apr 8, 2025
@tgross35
Apply requested API changes to cell_update
d695b74 
Do the following:

* Switch to `impl FnOnce` rather than a generic `F`.
* Change `update` to return nothing.

This was discussed at a libs-api meeting [1].

Tracking issue: rust-lang#50186

[1]: rust-lang#134446 (comment)
github-actions bot pushed a commit to model-checking/verify-rust-std that referenced this pull request Apr 8, 2025
@matthiaskrgr
Rollup merge of rust-lang#139273 - tgross35:cell-update-changes, r=jh…
8621ac3 
…pratt

Apply requested API changes to `cell_update`

Do the following:

* Switch to `impl FnOnce` rather than a generic `F`.
* Change `update` to return nothing.

This was discussed at a libs-api meeting [1].

Tracking issue: rust-lang#50186

[1]: rust-lang#134446 (comment)
@Amanieu Amanieu added S-waiting-on-fcp Status: PR is in FCP and is awaiting for FCP to complete. and removed S-waiting-on-team Status: Awaiting decision from the relevant subteam (see the T-<team> label). labels Apr 8, 2025
@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 Apr 16, 2025
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rfcbot commented Apr 16, 2025

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 pull request Apr 16, 2025
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@tgross35
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libs-api completed FCP so this just needs libs review

r? libs

@rustbot rustbot added the T-libs Relevant to the library team, which will review and decide on the PR/issue. label Apr 24, 2025
@rustbot rustbot assigned thomcc and unassigned m-ou-se Apr 24, 2025
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jhpratt commented Apr 24, 2025

r? jhpratt

@bors r+ rollup

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bors commented Apr 24, 2025

📌 Commit ac34a6f has been approved by jhpratt

It is now in the queue for this repository.

@rustbot rustbot assigned jhpratt and unassigned thomcc Apr 24, 2025
@bors bors added the S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. label Apr 24, 2025
@matthiaskrgr matthiaskrgr mentioned this pull request Apr 24, 2025
Merged
bors added a commit to rust-lang-ci/rust that referenced this pull request Apr 24, 2025
@bors
Auto merge of rust-lang#140239 - matthiaskrgr:rollup-75felo8, r=matth…
dc8fe1f 
…iaskrgr

Rollup of 9 pull requests

Successful merges:

 - rust-lang#134446 (Stabilize the `cell_update` feature)
 - rust-lang#139307 (std: Add performance warnings to HashMap::get_disjoint_mut)
 - rust-lang#139450 (Impl new API `std::os::unix::fs::mkfifo` under feature `unix_fifo`)
 - rust-lang#139809 (Don't warn about `v128` in wasm ABI transition)
 - rust-lang#139852 (StableMIR: Implement `CompilerInterface`)
 - rust-lang#139945 (Extend HIR to track the source and syntax of a lifetime)
 - rust-lang#140028 (`deref_patterns`: support string and byte string literals in explicit `deref!("...")` patterns)
 - rust-lang#140181 (Remove `synstructure::Structure::underscore_const` calls.)
 - rust-lang#140232 (Remove unnecessary clones)

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit fdaa91a into rust-lang:master Apr 24, 2025
6 checks passed
@rustbot rustbot added this to the 1.88.0 milestone Apr 24, 2025
rust-timer added a commit to rust-lang-ci/rust that referenced this pull request Apr 24, 2025
@rust-timer
Unrolled build for rust-lang#134446
35d7059 
Rollup merge of rust-lang#134446 - tgross35:stabilize-cell_update, r=jhpratt

Stabilize the `cell_update` feature

Included API:

```rust
impl<T: Copy> Cell<T> {
    pub fn update(&self, f: impl FnOnce(T) -> T);
}
```

FCP completed once at rust-lang#50186 (comment) but the signature has since changed.

Closes: rust-lang#50186
@tgross35 tgross35 deleted the stabilize-cell_update branch April 24, 2025 15:01
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Tracking issue for Cell::update
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@tgross35 @rustbot @GrigorenkoPV @bors @Amanieu @rfcbot @jhpratt @m-ou-se @thomcc @workingjubilee