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Implement "low priority impls" - #159003

Draft

WaffleLapkin wants to merge 14 commits into

rust-lang:mainfrom

WaffleLapkin:low-prio-impls

Draft

Implement "low priority impls"#159003
WaffleLapkin wants to merge 14 commits into
rust-lang:mainfrom
WaffleLapkin:low-prio-impls

Commits on Sep 30, 2026
- add a doc comment for `fcw!`
  WaffleLapkin
  committed
  332ea6a
- Add `TraitEngine::is_in_probe`
  WaffleLapkin
  committed
  ce731fd
- add a way to find infer source
  WaffleLapkin
  committed
  c673892
- Add `#[rustc_low_priority]` attribute
  WaffleLapkin
  committed
  10f1531
- extract_tupled_inputs_and_output_from_callable: don't crash on self_ty referencing error
  WaffleLapkin
  committed
  6e0167a
- add `CandidateSource::is_low_priority`
  WaffleLapkin
  committed
  1b8e033
- make things more public
  WaffleLapkin
  committed
  671e622
- declare a lint for low prio impls
  WaffleLapkin
  committed
  5f73ad4
- add a way to search for obligation merely mentioning an infer var
  WaffleLapkin
  committed
  7c6d9d4
- implement low priority impls?
  WaffleLapkin
  committed
  0b5f861
- add tests for low priority impls
  WaffleLapkin
  committed
  a8cdc09
- WaffleLapkin
  committed
  c9e1788
- WaffleLapkin
  committed
  202d955
- WaffleLapkin
  committed
  c897cc0