Rollup merge of #100095 - jackh726:early-binder, r=lcnr

More EarlyBinder cleanups

Each commit is independent

r? types

compiler/rustc_middle/src/mir/mod.rs

@@ -431,6 +431,12 @@ impl<'tcx> Body<'tcx> {
         self.local_decls[RETURN_PLACE].ty
     }
 
+    /// Returns the return type; it always return first element from `local_decls` array.
+    #[inline]
+    pub fn bound_return_ty(&self) -> ty::EarlyBinder<Ty<'tcx>> {
+        ty::EarlyBinder(self.local_decls[RETURN_PLACE].ty)
+    }
+
     /// Gets the location of the terminator for the given block.
     #[inline]
     pub fn terminator_loc(&self, bb: BasicBlock) -> Location {

compiler/rustc_middle/src/ty/adt.rs

@@ -563,7 +563,7 @@ impl<'tcx> AdtDef<'tcx> {
     ///
     /// Due to normalization being eager, this applies even if
     /// the associated type is behind a pointer (e.g., issue #31299).
-    pub fn sized_constraint(self, tcx: TyCtxt<'tcx>) -> &'tcx [Ty<'tcx>] {
-        tcx.adt_sized_constraint(self.did()).0
+    pub fn sized_constraint(self, tcx: TyCtxt<'tcx>) -> ty::EarlyBinder<&'tcx [Ty<'tcx>]> {
+        ty::EarlyBinder(tcx.adt_sized_constraint(self.did()).0)
     }
 }

compiler/rustc_middle/src/ty/sty.rs

@@ -2191,7 +2191,7 @@ impl<'tcx> Ty<'tcx> {
 
             ty::Tuple(tys) => tys.iter().all(|ty| ty.is_trivially_sized(tcx)),
 
-            ty::Adt(def, _substs) => def.sized_constraint(tcx).is_empty(),
+            ty::Adt(def, _substs) => def.sized_constraint(tcx).0.is_empty(),
 
             ty::Projection(_) | ty::Param(_) | ty::Opaque(..) => false,
 

compiler/rustc_middle/src/ty/util.rs

@@ -680,6 +680,24 @@ impl<'tcx> TyCtxt<'tcx> {
     pub fn bound_const_param_default(self, def_id: DefId) -> ty::EarlyBinder<ty::Const<'tcx>> {
         ty::EarlyBinder(self.const_param_default(def_id))
     }
+
+    pub fn bound_predicates_of(
+        self,
+        def_id: DefId,
+    ) -> ty::EarlyBinder<ty::generics::GenericPredicates<'tcx>> {
+        ty::EarlyBinder(self.predicates_of(def_id))
+    }
+
+    pub fn bound_explicit_predicates_of(
+        self,
+        def_id: DefId,
+    ) -> ty::EarlyBinder<ty::generics::GenericPredicates<'tcx>> {
+        ty::EarlyBinder(self.explicit_predicates_of(def_id))
+    }
+
+    pub fn bound_impl_subject(self, def_id: DefId) -> ty::EarlyBinder<ty::ImplSubject<'tcx>> {
+        ty::EarlyBinder(self.impl_subject(def_id))
+    }
 }
 
 struct OpaqueTypeExpander<'tcx> {