Generate DefIds for impl Trait in the def_collector

src/librustc/hir/lowering.rs

@@ -1179,14 +1179,11 @@ impl<'a> LoweringContext<'a> {
                     ImplTraitContext::Universal(def_id) => {
                         self.lower_node_id(def_node_id);
                         // Add a definition for the in-band TyParam
-                        let def_index = self.resolver.definitions().create_def_with_parent(
-                            def_id.index,
-                            def_node_id,
-                            DefPathData::UniversalImplTrait,
-                            DefIndexAddressSpace::High,
-                            Mark::root(),
-                            span,
-                        );
+                        let def_index = self
+                            .resolver
+                            .definitions()
+                            .opt_def_index(def_node_id)
+                            .unwrap();
 
                         let hir_bounds = self.lower_param_bounds(bounds, itctx);
                         // Set the name to `impl Bound1 + Bound2`
@@ -1254,18 +1251,12 @@ impl<'a> LoweringContext<'a> {
             span,
         );
 
-        // Pull a new definition from the ether
         let exist_ty_def_index = self
             .resolver
             .definitions()
-            .create_def_with_parent(
-            fn_def_id.index,
-            exist_ty_node_id,
-            DefPathData::ExistentialImplTrait,
-            DefIndexAddressSpace::High,
-            Mark::root(),
-            exist_ty_span,
-        );
+            .opt_def_index(exist_ty_node_id)
+            .unwrap();
+
 
         self.allocate_hir_id_counter(exist_ty_node_id, &"existential impl trait");
 

src/librustc/hir/map/def_collector.rs

@@ -302,6 +302,9 @@ impl<'a> visit::Visitor<'a> for DefCollector<'a> {
     fn visit_ty(&mut self, ty: &'a Ty) {
         match ty.node {
             TyKind::Mac(..) => return self.visit_macro_invoc(ty.id),
+            TyKind::ImplTrait(node_id, _) => {
+                self.create_def(node_id, DefPathData::ImplTrait, REGULAR_SPACE, ty.span);
+            }
             _ => {}
         }
         visit::walk_ty(self, ty);

src/librustc/hir/map/definitions.rs

@@ -374,10 +374,8 @@ pub enum DefPathData {
     StructCtor,
     /// A constant expression (see {ast,hir}::AnonConst).
     AnonConst,
-    /// An `impl Trait` type node in argument position.
-    UniversalImplTrait,
-    /// An `impl Trait` type node in return position.
-    ExistentialImplTrait,
+    /// An `impl Trait` type node
+    ImplTrait,
 
     /// GlobalMetaData identifies a piece of crate metadata that is global to
     /// a whole crate (as opposed to just one item). GlobalMetaData components
@@ -641,8 +639,7 @@ impl DefPathData {
             ClosureExpr |
             StructCtor |
             AnonConst |
-            ExistentialImplTrait |
-            UniversalImplTrait => None
+            ImplTrait => None
         }
     }
 
@@ -672,8 +669,7 @@ impl DefPathData {
             ClosureExpr => "{{closure}}",
             StructCtor => "{{constructor}}",
             AnonConst => "{{constant}}",
-            ExistentialImplTrait => "{{exist-impl-Trait}}",
-            UniversalImplTrait => "{{univ-impl-Trait}}",
+            ImplTrait => "{{impl-Trait}}",
         };
 
         Symbol::intern(s).as_interned_str()

src/librustc/ty/item_path.rs

@@ -221,8 +221,7 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
             data @ DefPathData::AnonConst |
             data @ DefPathData::MacroDef(..) |
             data @ DefPathData::ClosureExpr |
-            data @ DefPathData::ExistentialImplTrait |
-            data @ DefPathData::UniversalImplTrait |
+            data @ DefPathData::ImplTrait |
             data @ DefPathData::GlobalMetaData(..) => {
                 let parent_def_id = self.parent_def_id(def_id).unwrap();
                 self.push_item_path(buffer, parent_def_id);

src/librustc/util/ppaux.rs

@@ -291,8 +291,7 @@ impl PrintContext {
                     DefPathData::Field(_) |
                     DefPathData::StructCtor |
                     DefPathData::AnonConst |
-                    DefPathData::ExistentialImplTrait |
-                    DefPathData::UniversalImplTrait |
+                    DefPathData::ImplTrait |
                     DefPathData::GlobalMetaData(_) => {
                         // if we're making a symbol for something, there ought
                         // to be a value or type-def or something in there