Implement reflecting on mixin applications.

dart/sdk/lib/_internal/compiler/implementation/enqueue.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.
 
 part of dart2js;
 
 class EnqueueTask extends CompilerTask {
   final ResolutionEnqueuer resolution;
   final CodegenEnqueuer codegen;
 
   /// A reverse map from name to *all* elements with that name, not
   /// just instance members of instantiated classes.
   final Map<String, Link<Element>> allElementsByName
       = new Map<String, Link<Element>>();
 
   void ensureAllElementsByName() {
     if (!allElementsByName.isEmpty) return;
 
     void addMemberByName(Element element) {
       element = element.declaration;
       String name = element.name.slowToString();
-      Link<Element> members = const Link<Element>();
+      ScopeContainerElement container = null;
       if (element.isLibrary()) {
-        LibraryElementX library = element;
+        LibraryElement library = element;
         // Don't include private implementation libraries.  These
         // libraries contain special classes that cause problems
         // in other parts of the resolver (in particular Null and Void).
         // TODO(ahe): Consider lifting this restriction.
         if (!library.isInternalLibrary) {
-          members = library.localMembers;
+          container = library;
           // TODO(ahe): Is this right?  Is this necessary?
           name = library.getLibraryOrScriptName();
         }
-      } else if (element.isClass() && !element.isMixinApplication) {
-        // TODO(ahe): Investigate what makes mixin applications crash
-        // this method.
-        ClassElementX cls = element;
+      } else if (element.isClass()) {
+        ClassElement cls = element;
         cls.ensureResolved(compiler);
-        members = cls.localMembers;
+        container = cls;
         for (var link = cls.computeTypeParameters(compiler);
              !link.isEmpty;
              link = link.tail) {
           addMemberByName(link.head.element);
         }
       }
       allElementsByName[name] = allElementsByName.putIfAbsent(
           name, () => const Link<Element>()).prepend(element);
-      for (var link = members; !link.isEmpty; link = link.tail) {
-        addMemberByName(link.head);
+      if (container != null) {
+        container.forEachLocalMember(addMemberByName);
       }
     }
 
     compiler.libraries.values.forEach(addMemberByName);
   }
 
   String get name => 'Enqueue';
 
   EnqueueTask(Compiler compiler)
     : resolution = new ResolutionEnqueuer(
@@ skipping 256 matching lines @@
     if (!compiler.backend.isNeededForReflection(element)) return;
     if (Elements.isUnresolved(element)) {
       // Ignore.
     } else if (element.isSynthesized
                && element.getLibrary().isPlatformLibrary) {
       // TODO(ahe): Work-around for http://dartbug.com/11205.
     } else if (element.isConstructor()) {
       ClassElement cls = element.declaration.getEnclosingClass();
       registerInstantiatedType(cls.rawType, elements);
       registerStaticUse(element.declaration);
-    } else if (element.isMixinApplication) {
-      // Don't enqueue mixin applications.
     } else if (element.isClass()) {
       ClassElement cls = element.declaration;
-      registerInstantiatedType(cls.rawType, elements);
+      registerInstantiatedClass(cls, elements);
       // Make sure that even abstract classes are considered instantiated.
       universe.instantiatedClasses.add(cls);
     } else if (element.impliesType()) {
       // Don't enqueue typedefs, and type variables.
     } else if (Elements.isStaticOrTopLevel(element)) {
       registerStaticUse(element.declaration);
     } else if (element.isInstanceMember()) {
       Selector selector = new Selector.fromElement(element, compiler);
       registerSelectorUse(selector);
       if (element.isField()) {
@@ skipping 392 matching lines @@
     while(!queue.isEmpty) {
       // TODO(johnniwinther): Find an optimal process order for codegen.
       f(queue.removeLast());
     }
   }
 
   void _logSpecificSummary(log(message)) {
     log('Compiled ${generatedCode.length} methods.');
   }
 }