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Implement TryFrom between NonZero types. #77339

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m-ou-se
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@m-ou-se m-ou-se commented Sep 29, 2020

This will instantly be stable, as trait implementations for stable types and traits can not be #[unstable].

Closes #77258.

@rustbot modify labels: +T-libs

@rustbot rustbot added the T-libs-api Relevant to the library API team, which will review and decide on the PR/issue. label Sep 29, 2020
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r? @dtolnay

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@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Sep 29, 2020
@scottmcm scottmcm added the needs-fcp This change is insta-stable, so needs a completed FCP to proceed. label Oct 1, 2020
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Thanks, this is great.

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dtolnay commented Oct 15, 2020

@rust-lang/libs: This PR adds all the appropriate nonzero->nonzero TryFrom impls, e.g.:

impl TryFrom<NonZeroU64> for NonZeroI32

The Error associated type of the TryFrom impl is the same one that we use for all int->int, int->nonzero, nonzero->int TryFrom impls already.

@rfcbot fcp merge

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rfcbot commented Oct 15, 2020

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 Oct 15, 2020
@rfcbot rfcbot added the final-comment-period In the final comment period and will be merged soon unless new substantive objections are raised. label Oct 23, 2020
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rfcbot commented Oct 23, 2020

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

@rfcbot rfcbot removed the proposed-final-comment-period Proposed to merge/close by relevant subteam, see T-<team> label. Will enter FCP once signed off. label Oct 23, 2020
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dtolnay commented Oct 23, 2020

@bors r+

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bors commented Oct 23, 2020

📌 Commit b9db54b has been approved by dtolnay

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bors commented Oct 23, 2020

🌲 The tree is currently closed for pull requests below priority 1000, this pull request will be tested once the tree is reopened

@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 Oct 23, 2020
bors added a commit to rust-lang-ci/rust that referenced this pull request Oct 23, 2020
Rollup of 17 pull requests

Successful merges:

 - rust-lang#77268 (Link to "Contributing to Rust" rather than "Getting Started".)
 - rust-lang#77339 (Implement TryFrom between NonZero types.)
 - rust-lang#77488 (Mark `repr128` as `incomplete_features`)
 - rust-lang#77890 (Fixing escaping to ensure generation of welformed json.)
 - rust-lang#77918 (Cleanup network tests)
 - rust-lang#77920 (Avoid extraneous space between visibility kw and ident for statics)
 - rust-lang#77969 (Doc formating consistency between slice sort and sort_unstable, and big O notation consistency)
 - rust-lang#78098 (Clean up and improve some docs)
 - rust-lang#78116 (Make inline const work in range patterns)
 - rust-lang#78153 (Sync LLVM submodule if it has been initialized)
 - rust-lang#78163 (Clean up lib docs)
 - rust-lang#78169 (Update cargo)
 - rust-lang#78231 (Make closures inherit the parent function's target features)
 - rust-lang#78235 (Explain where the closure return type was inferred)
 - rust-lang#78255 (Reduce diagram mess in 'match arms have incompatible types' error)
 - rust-lang#78263 (Add regression test of issue-77668)
 - rust-lang#78265 (Add some inference-related regression tests about incorrect diagnostics)

Failed merges:

r? `@ghost`
@bors bors merged commit 8e37330 into rust-lang:master Oct 23, 2020
@rustbot rustbot added this to the 1.49.0 milestone Oct 23, 2020
@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 Nov 2, 2020
@spastorino spastorino removed the to-announce Announce this issue on triage meeting label Nov 5, 2020
@jplatte jplatte mentioned this pull request Jan 26, 2021
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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. needs-fcp This change is insta-stable, so needs a completed FCP to proceed. S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. T-libs-api Relevant to the library API team, which will review and decide on the PR/issue.
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Successfully merging this pull request may close these issues.

Missing TryFrom<NonZeroFoo> for NonZeroBar
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