bjoernager/rust
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Add AliasKind::Weak for type aliases.

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Only use it when the type alias contains an opaque type.

Also does wf-checking on such type aliases.
This commit is contained in:
Oli Scherer 2023-03-07 12:03:11 +00:00
parent 4fdd07fe88
commit f3b7dd6388
86 changed files with 474 additions and 199 deletions
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4
compiler/rustc_lint/src/builtin.rs
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@ -1465,8 +1465,8 @@ impl<'tcx> LateLintPass<'tcx> for TypeAliasBounds {
let hir::ItemKind::TyAlias(ty, type_alias_generics) = &item.kind else {
return
};
if let hir::TyKind::OpaqueDef(..) = ty.kind {
// Bounds are respected for `type X = impl Trait`
if cx.tcx.type_of(item.owner_id.def_id).skip_binder().has_opaque_types() {
// Bounds are respected for `type X = impl Trait` and `type X = (impl Trait, Y);`
return;
}
if cx.tcx.type_of(item.owner_id).skip_binder().has_inherent_projections() {