Delay 'supertype' for ClassElementImpl and EnumElementImpl.

pkg/analyzer/lib/src/dart/element/element.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library analyzer.src.dart.element.element;
 
 import 'dart:collection';
 import 'dart:math' show min;
 
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 62 matching lines @@
   /**
    * A list containing all of the methods contained in this class.
    */
   List<MethodElement> _methods = MethodElement.EMPTY_LIST;
 
   /**
    * The superclass of the class, or `null` if the class does not have an
    * explicit superclass.
    */
   @override
-  InterfaceType supertype;
+  InterfaceType _supertype;
 
   /**
    * The type defined by the class.
    */
   @override
   InterfaceType type;
 
   /**
    * A list containing all of the type parameters defined for this class.
    */
@@ skipping 1037 matching lines @@
 
   @override
   int get nameOffset {
     if (_unlinkedClass != null) {
       return _unlinkedClass.nameOffset;
     }
     return super.nameOffset;
   }
 
   @override
+  InterfaceType get supertype {
+    if (_unlinkedClass != null && _supertype == null) {
+      if (_unlinkedClass.supertype != null) {
+        _supertype = enclosingUnit.resynthesizerContext
+            .resolveTypeRef(_unlinkedClass.supertype, this);
+      } else if (_unlinkedClass.hasNoSupertype) {
+        return null;
+      } else {
+        _supertype = context.typeProvider.objectType;
+      }
+    }
+    return _supertype;
+  }
+
+  void set supertype(InterfaceType supertype) {
+    assert(_unlinkedClass == null);
+    _supertype = supertype;
+  }
+
+  @override
   List<TypeParameterElement> get typeParameters {
     if (_unlinkedClass != null) {
       return resynthesizedTypeParameters;
     }
     return super.typeParameters;
   }
 
   /**
    * Set the type parameters defined for this class to the given
    * [typeParameters].
@@ skipping 1898 matching lines @@
 
   @override
   int get nameOffset {
     if (_unlinkedEnum != null) {
       return _unlinkedEnum.nameOffset;
     }
     return super.nameOffset;
   }
 
   @override
+  InterfaceType get supertype => context.typeProvider.objectType;
+
+  @override
   List<TypeParameterElement> get typeParameters =>
       const <TypeParameterElement>[];
 
   /**
    * Set the type parameters defined for this class to the given
    * [typeParameters].
    */
   void set typeParameters(List<TypeParameterElement> typeParameters) {
     assert(false);
   }
@@ skipping 4859 matching lines @@
 
   @override
   void visitElement(Element element) {
     int offset = element.nameOffset;
     if (offset != -1) {
       map[offset] = element;
     }
     super.visitElement(element);
   }
 }