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Fix pretty printing of placeholder types

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This commit is contained in:
Michael Goulet 2025-06-25 17:07:18 +00:00
parent 74570e526e
commit d79b669b09
8 changed files with 41 additions and 36 deletions
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12
compiler/rustc_trait_selection/src/error_reporting/infer/region.rs
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@ -713,14 +713,14 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> {
}
let labeled_user_string = match bound_kind {
GenericKind::Param(ref p) => format!("the parameter type `{p}`"),
GenericKind::Placeholder(ref p) => format!("the placeholder type `{p:?}`"),
GenericKind::Alias(ref p) => match p.kind(self.tcx) {
GenericKind::Param(_) => format!("the parameter type `{bound_kind}`"),
GenericKind::Placeholder(_) => format!("the placeholder type `{bound_kind}`"),
GenericKind::Alias(p) => match p.kind(self.tcx) {
ty::Projection | ty::Inherent => {
format!("the associated type `{p}`")
format!("the associated type `{bound_kind}`")
}
ty::Free => format!("the type alias `{p}`"),
ty::Opaque => format!("the opaque type `{p}`"),
ty::Free => format!("the type alias `{bound_kind}`"),
ty::Opaque => format!("the opaque type `{bound_kind}`"),
},
};