CopyProp: fix outdated comment

RalfJung · RalfJung · commit bd16cd4fb54a · 2026-03-24T08:12:17.000+01:00
diff --git a/compiler/rustc_mir_transform/src/copy_prop.rs b/compiler/rustc_mir_transform/src/copy_prop.rs
@@ -58,7 +58,8 @@ impl<'tcx> crate::MirPass<'tcx> for CopyProp {
     }
 }
 
-/// Utility to help performing substitution of `*pattern` by `target`.
+/// Utility to help performing substitution: for all key-value pairs in `copy_classes`,
+/// all occurrences of the key get replaced by the value.
 struct Replacer<'a, 'tcx> {
     tcx: TyCtxt<'tcx>,
     unified: DenseBitSet<Local>,

Original file line number	Diff line number	Diff line change
`@@ -58,7 +58,8 @@ impl<'tcx> crate::MirPass<'tcx> for CopyProp {`
`58`	`58`	`}`
`59`	`59`	`}`
`60`	`60`
`61`		-/// Utility to help performing substitution of `*pattern` by `target`.
	`61`	+/// Utility to help performing substitution: for all key-value pairs in `copy_classes`,
	`62`	`+/// all occurrences of the key get replaced by the value.`
`62`	`63`	`struct Replacer<'a, 'tcx> {`
`63`	`64`	`tcx: TyCtxt<'tcx>,`
`64`	`65`	`unified: DenseBitSet<Local>,`