X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=compiler%2Frustc_trait_selection%2Fsrc%2Ftraits%2Fselect%2Fcandidate_assembly.rs;h=c54d901e9b10aff43f7e9106632beef59ae3e495;hb=d67000e44e1b9908c81fc4d5de875608f1b80ae9;hp=e4b70f0d2ffa7afbfc54dbf7fdaa252400ef1226;hpb=e5a01b97ee9a3dc45d7f5055c8b0f4482b2ebad7;p=rust.git

diff --git a/compiler/rustc_trait_selection/src/traits/select/candidate_assembly.rs b/compiler/rustc_trait_selection/src/traits/select/candidate_assembly.rs
index e4b70f0d2ff..c54d901e9b1 100644
--- a/compiler/rustc_trait_selection/src/traits/select/candidate_assembly.rs
+++ b/compiler/rustc_trait_selection/src/traits/select/candidate_assembly.rs
@@ -138,7 +138,7 @@ fn assemble_candidates_from_projected_tys(
         // Before we go into the whole placeholder thing, just
         // quickly check if the self-type is a projection at all.
         match obligation.predicate.skip_binder().trait_ref.self_ty().kind() {
-            ty::Projection(_) | ty::Opaque(..) => {}
+            ty::Alias(..) => {}
             ty::Infer(ty::TyVar(_)) => {
                 span_bug!(
                     obligation.cause.span,
@@ -394,7 +394,7 @@ fn assemble_candidates_from_auto_impls(
                     // still be provided by a manual implementation for
                     // this trait and type.
                 }
-                ty::Param(..) | ty::Projection(..) => {
+                ty::Param(..) | ty::Alias(ty::Projection, ..) => {
                     // In these cases, we don't know what the actual
                     // type is.  Therefore, we cannot break it down
                     // into its constituent types. So we don't
@@ -536,10 +536,7 @@ fn need_migrate_deref_output_trait_object(
             let ty = traits::normalize_projection_type(
                 self,
                 param_env,
-                ty::ProjectionTy {
-                    item_def_id: tcx.lang_items().deref_target()?,
-                    substs: trait_ref.substs,
-                },
+                tcx.mk_alias_ty(tcx.lang_items().deref_target()?, trait_ref.substs),
                 cause.clone(),
                 0,
                 // We're *intentionally* throwing these away,
@@ -737,13 +734,12 @@ fn assemble_const_destruct_candidates(
 
         let self_ty = self.infcx.shallow_resolve(obligation.self_ty());
         match self_ty.skip_binder().kind() {
-            ty::Opaque(..)
+            ty::Alias(..)
             | ty::Dynamic(..)
             | ty::Error(_)
             | ty::Bound(..)
             | ty::Param(_)
-            | ty::Placeholder(_)
-            | ty::Projection(_) => {
+            | ty::Placeholder(_) => {
                 // We don't know if these are `~const Destruct`, at least
                 // not structurally... so don't push a candidate.
             }
@@ -829,8 +825,7 @@ fn assemble_candidate_for_tuple(
             | ty::Generator(_, _, _)
             | ty::GeneratorWitness(_)
             | ty::Never
-            | ty::Projection(_)
-            | ty::Opaque(_, _)
+            | ty::Alias(..)
             | ty::Param(_)
             | ty::Bound(_, _)
             | ty::Error(_)