bjoernager/rust
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Replace RPITIT current impl with new strategy that lowers as a GAT

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Santiago Pastorino 2023-06-24 00:00:08 -03:00
parent d1389b9b48
commit 20429af7a3
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GPG key ID: 8131A24E0C79EFAF
146 changed files with 1106 additions and 586 deletions
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10
compiler/rustc_ty_utils/src/ty.rs
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@ -282,11 +282,7 @@ impl<'tcx> TypeVisitor<TyCtxt<'tcx>> for ImplTraitInTraitFinder<'_, 'tcx> {
// If we're lowering to associated item, install the opaque type which is just
// the `type_of` of the trait's associated item. If we're using the old lowering
// strategy, then just reinterpret the associated type like an opaque :^)
let default_ty = if self.tcx.lower_impl_trait_in_trait_to_assoc_ty() {
self.tcx.type_of(shifted_alias_ty.def_id).subst(self.tcx, shifted_alias_ty.substs)
} else {
Ty::new_alias(self.tcx,ty::Opaque, shifted_alias_ty)
};
let default_ty = self.tcx.type_of(shifted_alias_ty.def_id).subst(self.tcx, shifted_alias_ty.substs);
self.predicates.push(
ty::Binder::bind_with_vars(
@ -408,9 +404,7 @@ fn unsizing_params_for_adt<'tcx>(tcx: TyCtxt<'tcx>, def_id: DefId) -> BitSet<u32
};
// The last field of the structure has to exist and contain type/const parameters.
let Some((tail_field, prefix_fields)) =
def.non_enum_variant().fields.raw.split_last() else
{
let Some((tail_field, prefix_fields)) = def.non_enum_variant().fields.raw.split_last() else {
return BitSet::new_empty(num_params);
};