Temporary workaround to process default clauses.

lib/compiler/implementation/dart_backend/backend.dart

 // Copyright (c) 2012, 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 DartBackend extends Backend {
   final List<CompilerTask> tasks;
   final UnparseValidator unparseValidator;
 
   Map<Element, TreeElements> get resolvedElements() =>
       compiler.enqueuer.resolution.resolvedElements;
@@ skipping 129 matching lines @@
       this.compiler,
       this.rootElement, this.treeElements,
       this.typedefs, this.classes);
 
   void collectElement(Element element) {
     new ReferencedElementCollector(
         compiler, element, new TreeElementMapping(), typedefs, classes)
     .collect();
   }
 
+  visitClassNode(ClassNode node) {
+    super.visitClassNode(node);
+    // Temporary hack which should go away once interfaces
+    // and default clauses are out.
+    if (node.defaultClause !== null) {
+      // Resolver cannot resolve parameterized default clauses.
+      TypeAnnotation evilCousine = new TypeAnnotation(

[Roman, 2012/08/15 14:52:22]

What a hack!

[Anton Muhin, 2012/08/15 15:11:35]

Yes, we can!

On 2012/08/15 14:52:22, Roman wrote:

+          node.defaultClause.typeName, null);
+      evilCousine.accept(this);
+    }
+  }
+
   visitNode(Node node) { node.visitChildren(this); }
 
   visitTypeAnnotation(TypeAnnotation typeAnnotation) {
     final type = compiler.resolveTypeAnnotation(rootElement, typeAnnotation);
     Element typeElement = type.element;
     if (typeElement.isTypedef() && !typedefs.contains(typeElement)) {
       typedefs.add(typeElement);
       collectElement(typeElement);
     }
     if (typeElement.isClass() && !classes.contains(typeElement)) {
       classes.add(typeElement);
       collectElement(typeElement);
     }
     typeAnnotation.visitChildren(this);
   }
 
   void collect() {
     compiler.withCurrentElement(rootElement, () {
       rootElement.parseNode(compiler).accept(this);
     });
   }
 }