Emit declarations for typedefs that are needed by reflection.

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;
 
 typedef ItemCompilationContext ItemCompilationContextCreator();
 
 class EnqueueTask extends CompilerTask {
   final ResolutionEnqueuer resolution;
@@ skipping 302 matching lines @@
       registerStaticUse(ctor.declaration);
     }
   }
 
   /// Enqeue the member [element] if it is required for reflection.
   ///
   /// [enclosingWasIncluded] provides a hint whether the enclosing element was
   /// needed for reflection.
   void enqueueReflectiveMember(Element element, bool enclosingWasIncluded) {
     if (shouldIncludeElementDueToMirrors(element,
-            includedEnclosing: enclosingWasIncluded)
-        // Do not enqueue typedefs.
-        && !element.impliesType) {
+            includedEnclosing: enclosingWasIncluded)) {
       logEnqueueReflectiveAction(element);
-      if (Elements.isStaticOrTopLevel(element)) {
+      if (element.isTypedef) {
+        compiler.resolver.resolve(element);

[herhut, 2014/07/02 12:26:12]

This code runs both during resolution enqueueing and codegen enqueueing. While
it is probably a noop in the latter case, it still breaks abstractions. How
about

element.ensureResolved(compiler);

which as a sideeffect will resolve it.

[karlklose, 2014/07/02 12:30:31]

Done.

+        compiler.world.allTypedefs.add(element);
+      } else if (Elements.isStaticOrTopLevel(element)) {
         registerStaticUse(element.declaration);
       } else if (element.isInstanceMember) {
         // We need to enqueue all members matching this one in subclasses, as
         // well.
         // TODO(herhut): Use TypedSelector.subtype for enqueueing
         Selector selector = new Selector.fromElement(element, compiler);
         registerSelectorUse(selector);
         if (element.isField) {
           Selector selector =
               new Selector.setter(element.name, element.library);
@@ skipping 511 matching lines @@
     }
     CodegenWorkItem workItem = new CodegenWorkItem(
         element, itemCompilationContextCreator());
     queue.add(workItem);
   }
 
   void _logSpecificSummary(log(message)) {
     log('Compiled ${generatedCode.length} methods.');
   }
 }