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Also match on the lang item in confirmation

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This commit is contained in:
Oli Scherer
2025-04-28 13:25:21 +00:00
parent dd714276e5
commit 03c05c9a95
1 changed files with 5 additions and 10 deletions
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15
compiler/rustc_trait_selection/src/traits/select/confirmation.rs
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@@ -252,16 +252,11 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
let tcx = self.tcx();
let obligations = if has_nested {
let trait_def = obligation.predicate.def_id();
let conditions = if tcx.is_lang_item(trait_def, LangItem::Sized) {
self.sized_conditions(obligation)
} else if tcx.is_lang_item(trait_def, LangItem::Copy) {
self.copy_clone_conditions(obligation)
} else if tcx.is_lang_item(trait_def, LangItem::Clone) {
self.copy_clone_conditions(obligation)
} else if tcx.is_lang_item(trait_def, LangItem::FusedIterator) {
self.fused_iterator_conditions(obligation)
} else {
bug!("unexpected builtin trait {:?}", trait_def)
let conditions = match tcx.as_lang_item(trait_def) {
Some(LangItem::Sized) => self.sized_conditions(obligation),
Some(LangItem::Copy | LangItem::Clone) => self.copy_clone_conditions(obligation),
Some(LangItem::FusedIterator) => self.fused_iterator_conditions(obligation),
other => bug!("unexpected builtin trait {trait_def:?} ({other:?})"),
};
let BuiltinImplConditions::Where(types) = conditions else {
bug!("obligation {:?} had matched a builtin impl but now doesn't", obligation);