1 files changed, 27 insertions, 21 deletions

diff --git a/compiler/rustc_infer/src/infer/nll_relate/mod.rs b/compiler/rustc_infer/src/infer/nll_relate/mod.rs
index f6bc4db0d..f235cb5ab 100644
--- a/compiler/rustc_infer/src/infer/nll_relate/mod.rs
+++ b/compiler/rustc_infer/src/infer/nll_relate/mod.rs
@@ -275,13 +275,13 @@ where
     ///   `ProjectionEq(projection = ?U)`, `ProjectionEq(other_projection = ?U)`.
     fn relate_projection_ty(
         &mut self,
-        projection_ty: ty::ProjectionTy<'tcx>,
+        projection_ty: ty::AliasTy<'tcx>,
         value_ty: Ty<'tcx>,
     ) -> Ty<'tcx> {
         use rustc_span::DUMMY_SP;
 
         match *value_ty.kind() {
-            ty::Projection(other_projection_ty) => {
+            ty::Alias(ty::Projection, other_projection_ty) => {
                 let var = self.infcx.next_ty_var(TypeVariableOrigin {
                     kind: TypeVariableOriginKind::MiscVariable,
                     span: DUMMY_SP,
@@ -335,7 +335,9 @@ where
                 return Ok(value_ty);
             }
 
-            ty::Projection(projection_ty) if D::normalization() == NormalizationStrategy::Lazy => {
+            ty::Alias(ty::Projection, projection_ty)
+                if D::normalization() == NormalizationStrategy::Lazy =>
+            {
                 return Ok(self.relate_projection_ty(projection_ty, self.infcx.tcx.mk_ty_var(vid)));
             }
 
@@ -406,8 +408,8 @@ where
             }
         };
         let (a, b) = match (a.kind(), b.kind()) {
-            (&ty::Opaque(..), _) => (a, generalize(b, false)?),
-            (_, &ty::Opaque(..)) => (generalize(a, true)?, b),
+            (&ty::Alias(ty::Opaque, ..), _) => (a, generalize(b, false)?),
+            (_, &ty::Alias(ty::Opaque, ..)) => (generalize(a, true)?, b),
             _ => unreachable!(),
         };
         let cause = ObligationCause::dummy_with_span(self.delegate.span());
@@ -437,7 +439,7 @@ trait VidValuePair<'tcx>: Debug {
     fn value_ty(&self) -> Ty<'tcx>;
 
     /// Extract the scopes that apply to whichever side of the tuple
-    /// the vid was found on.  See the comment where this is called
+    /// the vid was found on. See the comment where this is called
     /// for more details on why we want them.
     fn vid_scopes<'r, D: TypeRelatingDelegate<'tcx>>(
         &self,
@@ -608,26 +610,30 @@ where
 
             (&ty::Infer(ty::TyVar(vid)), _) => self.relate_ty_var((vid, b)),
 
-            (&ty::Opaque(a_def_id, _), &ty::Opaque(b_def_id, _)) if a_def_id == b_def_id => {
-                infcx.super_combine_tys(self, a, b).or_else(|err| {
-                    self.tcx().sess.delay_span_bug(
-                        self.delegate.span(),
-                        "failure to relate an opaque to itself should result in an error later on",
-                    );
-                    if a_def_id.is_local() { self.relate_opaques(a, b) } else { Err(err) }
-                })
-            }
-            (&ty::Opaque(did, ..), _) | (_, &ty::Opaque(did, ..)) if did.is_local() => {
+            (
+                &ty::Alias(ty::Opaque, ty::AliasTy { def_id: a_def_id, .. }),
+                &ty::Alias(ty::Opaque, ty::AliasTy { def_id: b_def_id, .. }),
+            ) if a_def_id == b_def_id => infcx.super_combine_tys(self, a, b).or_else(|err| {
+                self.tcx().sess.delay_span_bug(
+                    self.delegate.span(),
+                    "failure to relate an opaque to itself should result in an error later on",
+                );
+                if a_def_id.is_local() { self.relate_opaques(a, b) } else { Err(err) }
+            }),
+            (&ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }), _)
+            | (_, &ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }))
+                if def_id.is_local() =>
+            {
                 self.relate_opaques(a, b)
             }
 
-            (&ty::Projection(projection_ty), _)
+            (&ty::Alias(ty::Projection, projection_ty), _)
                 if D::normalization() == NormalizationStrategy::Lazy =>
             {
                 Ok(self.relate_projection_ty(projection_ty, b))
             }
 
-            (_, &ty::Projection(projection_ty))
+            (_, &ty::Alias(ty::Projection, projection_ty))
                 if D::normalization() == NormalizationStrategy::Lazy =>
             {
                 Ok(self.relate_projection_ty(projection_ty, a))
@@ -825,7 +831,7 @@ where
 /// (these are not explicitly present in the ty representation right
 /// now). This visitor handles that: it descends the type, tracking
 /// binder depth, and finds late-bound regions targeting the
-/// `for<..`>.  For each of those, it creates an entry in
+/// `for<..`>. For each of those, it creates an entry in
 /// `bound_region_scope`.
 struct ScopeInstantiator<'me, 'tcx> {
     next_region: &'me mut dyn FnMut(ty::BoundRegion) -> ty::Region<'tcx>,
@@ -843,7 +849,7 @@ impl<'me, 'tcx> TypeVisitor<'tcx> for ScopeInstantiator<'me, 'tcx> {
         t.super_visit_with(self);
         self.target_index.shift_out(1);
 
-        ControlFlow::CONTINUE
+        ControlFlow::Continue(())
     }
 
     fn visit_region(&mut self, r: ty::Region<'tcx>) -> ControlFlow<Self::BreakTy> {
@@ -857,7 +863,7 @@ impl<'me, 'tcx> TypeVisitor<'tcx> for ScopeInstantiator<'me, 'tcx> {
             _ => {}
         }
 
-        ControlFlow::CONTINUE
+        ControlFlow::Continue(())
     }
 }