AST nodes for function-typed parameters.

dart/frog/leg/resolver.dart

 // Copyright (c) 2011, 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.
 
 class TreeElements {
   Map<Node, Element> map;
   TreeElements() : map = new LinkedHashMap<Node, Element>();
   operator []=(Node node, Element element) => map[node] = element;
   operator [](Node node) => map[node];
 }
@@ skipping 566 matching lines @@
     variables = new VariableListElement.node(
         definitions, ElementKind.VARIABLE_LIST, resolver.context.element);
   }
 
   SourceString visitSendSet(SendSet node) {
     assert(node.arguments.tail.isEmpty()); // Sanity check
     if (node.receiver !== null) {
       resolver.cancel(node,
           "receiver on a variable definition not implemented");
     }
-    Identifier selector = node.selector;
     resolver.visit(node.arguments.head);
-
     return visit(node.selector);
   }
 
   SourceString visitIdentifier(Identifier node) => node.source;
 
   visitNodeList(NodeList node) {
     for (Link<Node> link = node.nodes; !link.isEmpty(); link = link.tail) {
       SourceString name = visit(link.head);
       Element element = new VariableElement(
           name, variables, kind, resolver.context.element);
@@ skipping 105 matching lines @@
 class TopScope extends Scope {
   Universe universe;
 
   TopScope(Universe this.universe) : super(null, null);
   Element lookup(SourceString name) => universe.find(name);
 
   Element add(Element element) {
     throw "Cannot add an element in the top scope";
   }
 }