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Document const {} syntax for std::thread_local. #110620

Merged
merged 1 commit into from
Apr 28, 2023
Merged

Document const {} syntax for std::thread_local. #110620

merged 1 commit into from
Apr 28, 2023

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Noratrieb
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It exists and is pretty cool. More people should use it.

It was added in #83416 and stabilized in #91355 with the tracking issue #84223.

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rustbot commented Apr 20, 2023

r? @thomcc

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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 Apr 20, 2023
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rustbot commented Apr 20, 2023

Hey! It looks like you've submitted a new PR for the library teams!

If this PR contains changes to any rust-lang/rust public library APIs then please comment with @rustbot label +T-libs-api -T-libs to tag it appropriately. If this PR contains changes to any unstable APIs please edit the PR description to add a link to the relevant API Change Proposal or create one if you haven't already. If you're unsure where your change falls no worries, just leave it as is and the reviewer will take a look and make a decision to forward on if necessary.

Examples of T-libs-api changes:

  • Stabilizing library features
  • Introducing insta-stable changes such as new implementations of existing stable traits on existing stable types
  • Introducing new or changing existing unstable library APIs (excluding permanently unstable features / features without a tracking issue)
  • Changing public documentation in ways that create new stability guarantees
  • Changing observable runtime behavior of library APIs

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I'm marking it as relnotes because this was never in any release notes and it's pretty cool so it should be announced at least in some release notes, even if we're almost two years late.

@Noratrieb Noratrieb added the relnotes Marks issues that should be documented in the release notes of the next release. label Apr 20, 2023
@Noratrieb Noratrieb mentioned this pull request Apr 20, 2023
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joboet commented Apr 20, 2023

Also see #109908, which documents the same thing but is slightly more verbose.

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thomcc commented Apr 21, 2023

I think @m-ou-se's suggestion is worth taking, but r=me with that

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what do we do with #109908 now? should I close mine or should we just merge mine because it's ready now?

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@Noratrieb
Document const {} syntax for std::thread_local.
b56d85d 
It exists and is pretty cool. More people should use it.
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It's been two weeks on the other PR and while it's a big unfortunate that we have two PRs doing this (I did check the tracking issue but the other PR didn't backlink anything) this PR is ready while the other one hasn't been.
@bors r=thomcc rollup

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bors commented Apr 27, 2023

📌 Commit b56d85d has been approved by thomcc

It is now in the queue for this repository.

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Apr 27, 2023
@JohnTitor JohnTitor mentioned this pull request Apr 28, 2023
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bors added a commit to rust-lang-ci/rust that referenced this pull request Apr 28, 2023
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Auto merge of rust-lang#110919 - JohnTitor:rollup-9phs2vx, r=JohnTitor
033aa09 
Rollup of 7 pull requests

Successful merges:

 - rust-lang#109702 (configure --set support list as arguments)
 - rust-lang#110620 (Document `const {}` syntax for `std::thread_local`.)
 - rust-lang#110721 (format panic message only once)
 - rust-lang#110881 (refactor(docs): remove macro resolution fallback)
 - rust-lang#110893 (remove inline const deadcode in typeck)
 - rust-lang#110898 (Remove unused std::sys_common::thread_local_key::Key)
 - rust-lang#110909 (Skip `rustc` version detection on macOS)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit 085fbe9 into rust-lang:master Apr 28, 2023
@rustbot rustbot added this to the 1.71.0 milestone Apr 28, 2023
@Noratrieb Noratrieb deleted the document-the-undocumented branch April 28, 2023 06:37
@AnthonyMikh AnthonyMikh mentioned this pull request Apr 29, 2023
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kpreid added a commit to kpreid/all-is-cubes that referenced this pull request Jul 11, 2023
@kpreid
Use const thread local initialization.
0ebc33e 
This is newly documented but not new:
rust-lang/rust#110620
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relnotes Marks issues that should be documented in the release notes of the next release. S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. T-libs Relevant to the library team, which will review and decide on the PR/issue.
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