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Encode whether foreign opaques are TAITs or not

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This commit is contained in:
Michael Goulet 2023-01-18 18:03:06 +00:00
parent 79335f1ac4
commit 200f466d1a
8 changed files with 23 additions and 2 deletions
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2
compiler/rustc_hir_analysis/src/astconv/mod.rs
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@ -2602,7 +2602,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
match path.res {
Res::Def(DefKind::OpaqueTy | DefKind::ImplTraitPlaceholder, did) => {
// Check for desugared `impl Trait`.
assert!(ty::is_impl_trait_defn(tcx, did).is_none());
assert!(tcx.is_type_alias_impl_trait(did));
let item_segment = path.segments.split_last().unwrap();
self.prohibit_generics(item_segment.1.iter(), |err| {
err.note("`impl Trait` types can't have type parameters");