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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2
compiler/rustc_trait_selection/src/traits/select/mod.rs
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@ -2314,7 +2314,7 @@ impl<'tcx> SelectionContext<'_, 'tcx> {
| ty::Dynamic(..)
| ty::Param(..)
| ty::Foreign(..)
| ty::Alias(ty::Projection | ty::Inherent, ..)
| ty::Alias(ty::Projection | ty::Inherent | ty::Weak, ..)
| ty::Bound(..)
| ty::Infer(ty::TyVar(_) | ty::FreshTy(_) | ty::FreshIntTy(_) | ty::FreshFloatTy(_)) => {
bug!("asked to assemble constituent types of unexpected type: {:?}", t);