Create a new element for generic function types

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 412 matching lines @@
     _currentHolder.addTypeAlias(element);
     aliasName.staticElement = element;
     holder.validate();
     return null;
   }
 
   @override
   Object visitGenericFunctionType(GenericFunctionType node) {
     ElementHolder holder = new ElementHolder();
     _visitChildren(holder, node);
-    FunctionElementImpl element =
-        new FunctionElementImpl.forOffset(node.beginToken.offset);
+    GenericFunctionTypeElementImpl element =
+        new GenericFunctionTypeElementImpl.forOffset(node.beginToken.offset);
     _setCodeRange(element, node);
     element.parameters = holder.parameters;
     element.typeParameters = holder.typeParameters;
     FunctionType type = new FunctionTypeImpl(element);
     element.type = type;
-    if (node.returnType == null) {
-      element.hasImplicitReturnType = true;
-    }
-    _currentHolder.addFunction(element);
     (node as GenericFunctionTypeImpl).type = type;
     holder.validate();
     return null;
   }
 
   @override
   Object visitGenericTypeAlias(GenericTypeAlias node) {
     ElementHolder holder = new ElementHolder();
     _visitChildren(holder, node);
     SimpleIdentifier aliasName = node.name;
@@ skipping 1218 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();
   }
 }