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Rollup merge of #124080 - oli-obk:define_opaque_types10, r=compiler-errors

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Some unstable changes to where opaque types get defined

None of these can be reached from stable afaict.

r? ``@compiler-errors``

cc https://github.com/rust-lang/rust/issues/116652
This commit is contained in:
Matthias Krüger 2024-05-25 22:15:17 +02:00 • committed by GitHub
commit 1e841638e3
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35 changed files with 363 additions and 121 deletions
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6
compiler/rustc_trait_selection/src/traits/select/mod.rs
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@ -2539,7 +2539,7 @@ impl<'tcx> SelectionContext<'_, 'tcx> {
let InferOk { obligations, .. } = self
.infcx
.at(&cause, obligation.param_env)
.eq(DefineOpaqueTypes::No, placeholder_obligation_trait_ref, impl_trait_ref)
.eq(DefineOpaqueTypes::Yes, placeholder_obligation_trait_ref, impl_trait_ref)
.map_err(|e| {
debug!("match_impl: failed eq_trait_refs due to `{}`", e.to_string(self.tcx()))
})?;
@ -2594,7 +2594,7 @@ impl<'tcx> SelectionContext<'_, 'tcx> {
self.infcx
.at(&obligation.cause, obligation.param_env)
.eq(
DefineOpaqueTypes::No,
DefineOpaqueTypes::Yes,
upcast_principal.map_bound(|trait_ref| {
ty::ExistentialTraitRef::erase_self_ty(tcx, trait_ref)
}),
@ -2631,7 +2631,7 @@ impl<'tcx> SelectionContext<'_, 'tcx> {
nested.extend(
self.infcx
.at(&obligation.cause, obligation.param_env)
.eq(DefineOpaqueTypes::No, source_projection, target_projection)
.eq(DefineOpaqueTypes::Yes, source_projection, target_projection)
.map_err(|_| SelectionError::Unimplemented)?
.into_obligations(),
);