remove bound_type_of query; make type_of return EarlyBinder; change type_of in metadata

compiler/rustc_ty_utils/src/ty.rs

@@ -99,10 +99,12 @@ fn adt_sized_constraint(tcx: TyCtxt<'_>, def_id: DefId) -> &[Ty<'_>] {
     }
     let def = tcx.adt_def(def_id);
 
-    let result =
-        tcx.mk_type_list(def.variants().iter().flat_map(|v| v.fields.last()).flat_map(|f| {
-            sized_constraint_for_ty(tcx, def, tcx.bound_type_of(f.did).subst_identity())
-        }));
+    let result = tcx.mk_type_list(
+        def.variants()
+            .iter()
+            .flat_map(|v| v.fields.last())
+            .flat_map(|f| sized_constraint_for_ty(tcx, def, tcx.type_of(f.did).subst_identity())),
+    );
 
     debug!("adt_sized_constraint: {:?} => {:?}", def, result);
 
@@ -297,7 +299,7 @@ fn well_formed_types_in_env(tcx: TyCtxt<'_>, def_id: DefId) -> &ty::List<Predica
         // In an inherent impl, we assume that the receiver type and all its
         // constituents are well-formed.
         NodeKind::InherentImpl => {
-            let self_ty = tcx.bound_type_of(def_id).subst_identity();
+            let self_ty = tcx.type_of(def_id).subst_identity();
             inputs.extend(self_ty.walk());
         }
 
@@ -432,7 +434,7 @@ fn unsizing_params_for_adt<'tcx>(tcx: TyCtxt<'tcx>, def_id: DefId) -> BitSet<u32
     };
 
     let mut unsizing_params = BitSet::new_empty(num_params);
-    for arg in tcx.bound_type_of(tail_field.did).subst_identity().walk() {
+    for arg in tcx.type_of(tail_field.did).subst_identity().walk() {
         if let Some(i) = maybe_unsizing_param_idx(arg) {
             unsizing_params.insert(i);
         }
@@ -441,7 +443,7 @@ fn unsizing_params_for_adt<'tcx>(tcx: TyCtxt<'tcx>, def_id: DefId) -> BitSet<u32
     // Ensure none of the other fields mention the parameters used
     // in unsizing.
     for field in prefix_fields {
-        for arg in tcx.bound_type_of(field.did).subst_identity().walk() {
+        for arg in tcx.type_of(field.did).subst_identity().walk() {
             if let Some(i) = maybe_unsizing_param_idx(arg) {
                 unsizing_params.remove(i);
             }