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Allow constraining opaque types during unsizing

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This commit is contained in:
Oli Scherer
2024-05-24 13:41:20 +00:00
parent 9889a6f5d3
commit 4dcb70b8cf
7 changed files with 12 additions and 60 deletions
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6
compiler/rustc_trait_selection/src/traits/select/confirmation.rs
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@@ -1228,7 +1228,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
let InferOk { obligations, .. } = self
.infcx
.at(&obligation.cause, obligation.param_env)
.eq(DefineOpaqueTypes::No, b, a)
.eq(DefineOpaqueTypes::Yes, b, a)
.map_err(|_| Unimplemented)?;
ImplSource::Builtin(BuiltinImplSource::Misc, obligations)
@@ -1276,7 +1276,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
let InferOk { obligations, .. } = self
.infcx
.at(&obligation.cause, obligation.param_env)
.eq(DefineOpaqueTypes::No, target, new_struct)
.eq(DefineOpaqueTypes::Yes, target, new_struct)
.map_err(|_| Unimplemented)?;
nested.extend(obligations);
@@ -1309,7 +1309,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
let InferOk { mut obligations, .. } = self
.infcx
.at(&obligation.cause, obligation.param_env)
.eq(DefineOpaqueTypes::No, target, new_tuple)
.eq(DefineOpaqueTypes::Yes, target, new_tuple)
.map_err(|_| Unimplemented)?;
// Add a nested `T: Unsize<U>` predicate.