Start separating ClassElementImpl for Class and Enum.

pkg/analyzer/lib/src/dart/element/builder.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.builder;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
@@ skipping 400 matching lines @@
           new _ElementBuilder_visitClassDeclaration(this, nonFields));
       _buildFieldMap(holder.fieldsWithoutFlushing);
       int count = nonFields.length;
       for (int i = 0; i < count; i++) {
         nonFields[i].accept(this);
       }
     } finally {
       _currentHolder = previousHolder;
     }
     SimpleIdentifier className = node.name;
-    ClassElementImpl element = new ClassElementImpl.forNode(className);
+    ClassElementImpl element = new ClassElementImpl_Class.forNode(className);
     _setCodeRange(element, node);
     element.metadata = _createElementAnnotations(node.metadata);
     List<TypeParameterElement> typeParameters = holder.typeParameters;
     List<DartType> typeArguments = _createTypeParameterTypes(typeParameters);
     InterfaceTypeImpl interfaceType = new InterfaceTypeImpl(element);
     interfaceType.typeArguments = typeArguments;
     element.type = interfaceType;
     element.typeParameters = typeParameters;
     setElementDocumentationComment(element, node);
     element.abstract = node.isAbstract;
@@ skipping 29 matching lines @@
     //
     ClassElement classElement = node.element;
     _buildFieldMap(classElement.fields);
   }
 
   @override
   Object visitClassTypeAlias(ClassTypeAlias node) {
     ElementHolder holder = new ElementHolder();
     _visitChildren(holder, node);
     SimpleIdentifier className = node.name;
-    ClassElementImpl element = new ClassElementImpl.forNode(className);
+    ClassElementImpl element = new ClassElementImpl_Class.forNode(className);
     _setCodeRange(element, node);
     element.metadata = _createElementAnnotations(node.metadata);
     element.abstract = node.abstractKeyword != null;
     element.mixinApplication = true;
     List<TypeParameterElement> typeParameters = holder.typeParameters;
     element.typeParameters = typeParameters;
     List<DartType> typeArguments = _createTypeParameterTypes(typeParameters);
     InterfaceTypeImpl interfaceType = new InterfaceTypeImpl(element);
     interfaceType.typeArguments = typeArguments;
     element.type = interfaceType;
@@ skipping 128 matching lines @@
     _currentHolder.addParameter(parameter);
     parameterName.staticElement = parameter;
     normalParameter.accept(this);
     holder.validate();
     return null;
   }
 
   @override
   Object visitEnumDeclaration(EnumDeclaration node) {
     SimpleIdentifier enumName = node.name;
-    ClassElementImpl enumElement = new ClassElementImpl.forNode(enumName);
+    ClassElementImpl enumElement = new ClassElementImpl_Enum.forNode(enumName);
     _setCodeRange(enumElement, node);
     enumElement.metadata = _createElementAnnotations(node.metadata);
-    enumElement.enum2 = true;
     setElementDocumentationComment(enumElement, node);
     InterfaceTypeImpl enumType = new InterfaceTypeImpl(enumElement);
     enumElement.type = enumType;
     // The equivalent code for enums in the spec shows a single constructor,
     // but that constructor is not callable (since it is a compile-time error
     // to subclass, mix-in, implement, or explicitly instantiate an enum).  So
     // we represent this as having no constructors.
     enumElement.constructors = ConstructorElement.EMPTY_LIST;
     //
     // Build the elements for the constants. These are minimal elements; the
@@ skipping 848 matching lines @@
     return null;
   }
 
   /**
    * Return the lexical identifiers associated with the given [identifiers].
    */
   static List<String> _getIdentifiers(NodeList<SimpleIdentifier> identifiers) {
     return identifiers.map((identifier) => identifier.name).toList();
   }
 }