InvocationMirror implemented in dart2js.

lib/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.
 
 class EnqueueTask extends CompilerTask {
   final Enqueuer codegen;
   final Enqueuer resolution;
 
   String get name => 'Enqueue';
 
@@ skipping 85 matching lines @@
     queue.add(new WorkItem(element, elements, itemCompilationContextCreator()));
 
     // Enable runtime type support if we discover a getter called runtimeType.
     // We have to enable runtime type before hitting the codegen, so
     // that constructors know whether they need to generate code for
     // runtime type.
     if (element.isGetter() && element.name == Compiler.RUNTIME_TYPE) {
       compiler.enabledRuntimeType = true;
     } else if (element == compiler.functionApplyMethod) {
       compiler.enabledFunctionApply = true;
+    } else if (element == compiler.invokeOnMethod) {
+      compiler.enabledInvokeOn = true;
     }
 
     // Enable isolate support if we start using something from the
     // isolate library.
     LibraryElement library = element.getLibrary();
     if (!compiler.hasIsolateSupport()
         && library.uri.toString() == 'dart:isolate') {
       compiler.enableIsolateSupport(library);
     }
   }
@@ skipping 124 matching lines @@
     });
   }
 
   void registerNewSelector(SourceString name,
                            Selector selector,
                            Map<SourceString, Set<Selector>> selectorsMap) {
     if (name != selector.name) {
       String message = "$name != ${selector.name} (${selector.kind})";
       compiler.internalError("Wrong selector name: $message.");
     }
+    /*if (!compiler.enabledInvokeOn && name == Compiler.INVOKE_ON) {

[ngeoffray, 2012/10/26 08:34:55]

Remove comment.

[Johnni Winther, 2012/10/26 10:18:01]

Done.

+      if (selector.applies(compiler.invokeOnMethod, compiler)) {
+        compiler.enabledInvokeOn = true;
+      }
+    }*/
     Set<Selector> selectors =
         selectorsMap.putIfAbsent(name, () => new Set<Selector>());
     if (!selectors.contains(selector)) {
       selectors.add(selector);
       handleUnseenSelector(name, selector);
     }
   }
 
   void registerInvocation(SourceString methodName, Selector selector) {
     task.measure(() {
@@ skipping 102 matching lines @@
 
   String toString() => 'Enqueuer($name)';
 
   registerUsedSelector(Selector selector) {
     Element interceptor = compiler.backend.getInterceptor(selector);
     if (interceptor != null) {
       registerStaticUse(interceptor);
     }
   }
 }