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Tracking Issue for const_cmp #143800

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Tracking Issue for const_cmp#143800
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C-tracking-issueCategory: An issue tracking the progress of sth. like the implementation of an RFCS-tracking-unimplementedStatus: The feature has not been implemented.T-libsRelevant to the library team, which will review and decide on the PR/issue.

Description

@RalfJung
RalfJung
opened on Jul 11, 2025

Feature gate: #![feature(const_cmp)]

This is a tracking issue for PartialEq in const fn.

Public API

// core::cmp

#[const_trait]
pub trait PartialEq<Rhs: PointeeSized = Self>: PointeeSized { ... }

Steps / History

(Remember to update the S-tracking-* label when checking boxes.)

Unresolved Questions / Blockers

Footnotes

  1. https://std-dev-guide.rust-lang.org/feature-lifecycle/stabilization.html ↩

Activity

  1. RalfJung
    added
    T-libs-api[DEPRECATED; DO NOT USE]
    C-tracking-issueCategory: An issue tracking the progress of sth. like the implementation of an RFC
    S-tracking-unimplementedStatus: The feature has not been implemented.
    on Jul 11, 2025
  2. jhpratt
    added a commit that references this issue on Jul 12, 2025

    Rollup merge of rust-lang#143803 - RalfJung:const-trait-tracking, r=c…

    d1aa1e8

  3. chrisbouchard commented on Jul 13, 2025

    @chrisbouchard
    chrisbouchard
    on Jul 13, 2025

    Will this feature cover other std::cmp traits as well, such as PartialOrd and/or Ord? (Similar to how const_ops covers multiple traits from the std::ops module.) Or only PartialEq?

    Edit: I do see there was discussion on #143640 about how granular to be about features for new const traits and impls, so I understand this may not be fully decided yet.

  4. fmease
    added a commit that references this issue on Jul 13, 2025

    Rollup merge of rust-lang#143803 - RalfJung:const-trait-tracking, r=c…

    95b5a08

  5. RalfJung commented on Jul 13, 2025

    @RalfJung
    RalfJung
    on Jul 13, 2025
    MemberAuthor

    Yeah we can add those here if/when they get constified.

  6. rust-timer
    added a commit that references this issue on Jul 13, 2025

    Unrolled build for #143803

    b638dd3
  7. samueltardieu
    added 3 commits that reference this issue on Jul 15, 2025

    Rollup merge of rust-lang#143925 - oli-obk:slice-const-partialeq, r=f…

    1984522

    Rollup merge of rust-lang#143925 - oli-obk:slice-const-partialeq, r=f…

    d20e27c

    Rollup merge of rust-lang#143925 - oli-obk:slice-const-partialeq, r=f…

    f97b843
  8. jhpratt
    added a commit that references this issue on Jul 18, 2025

    Rollup merge of rust-lang#143925 - oli-obk:slice-const-partialeq, r=f…

    ce0ca25
  9. matthiaskrgr
    added 2 commits that reference this issue on Jul 18, 2025

    Rollup merge of rust-lang#143925 - oli-obk:slice-const-partialeq, r=f…

    0fdb283

    Rollup merge of rust-lang#143925 - oli-obk:slice-const-partialeq, r=f…

    82fbbdd
  10. rust-timer
    added a commit that references this issue on Jul 18, 2025

    Unrolled build for #143925

    1ccaf86

  11. 11 remaining items

  12. jhpratt
    added a commit that references this issue on Oct 25, 2025

    Rollup merge of rust-lang#147790 - npmccallum:slices, r=oli-obk

    7613af6
  13. rust-bors
    added a commit that references this issue on Mar 28, 2026

    Auto merge of #153821 - Lars-Schumann:const-step, r=Mark-Simulacrum

    7e28c74
  14. github-actions
    added 4 commits that reference this issue on Mar 29, 2026

    Auto merge of #153821 - Lars-Schumann:const-step, r=Mark-Simulacrum

    5054a1d

    Auto merge of #153821 - Lars-Schumann:const-step, r=Mark-Simulacrum

    8e78bb8

    Auto merge of #153821 - Lars-Schumann:const-step, r=Mark-Simulacrum

    7f4e321

    Auto merge of #153821 - Lars-Schumann:const-step, r=Mark-Simulacrum

    911cb5d
  15. clarfonthey
    removed their assignment
    on Apr 3, 2026
  16. github-actions
    added a commit that references this issue on Apr 6, 2026

    Auto merge of #153821 - Lars-Schumann:const-step, r=Mark-Simulacrum

    e2d3405
  17. jhpratt
    added a commit that references this issue on Apr 21, 2026

    Rollup merge of rust-lang#155565 - Lars-Schumann:const-vec-cmp, r=jhp…

    b4bab32
  18. rust-timer
    added a commit that references this issue on Apr 21, 2026

    Unrolled build for #155565

    9262e02
  19. ghaaj
    added a commit that references this issue on Aug 7, 2026

    Auto merge of #153821 - Lars-Schumann:const-step, r=Mark-Simulacrum

    ad51594
  20. clarfonthey
    added
    T-libsRelevant to the library team, which will review and decide on the PR/issue.
    and removed
    T-libs-api[DEPRECATED; DO NOT USE]
    on Aug 12, 2026
  21. JonathanBrouwer
    added a commit that references this issue on Sep 22, 2026

    Rollup merge of rust-lang#147790 - npmccallum:slices, r=clarfonthey

    e5cde7f
  22. rust-bors
    added a commit that references this issue on Sep 22, 2026

    Unrolled build for #147790 in rollup 163165

    ec787e6
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