InvocationMirror implemented in dart2js.

lib/compiler/implementation/compiler.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;
 
 /**
  * If true, print a warning for each method that was resolved, but not
  * compiled.
  */
@@ skipping 114 matching lines @@
   ClassElement dynamicClass;
   ClassElement boolClass;
   ClassElement numClass;
   ClassElement intClass;
   ClassElement doubleClass;
   ClassElement stringClass;
   ClassElement functionClass;
   ClassElement nullClass;
   ClassElement listClass;
   ClassElement mapClass;
+  ClassElement jsInvocationMirrorClass;
   Element assertMethod;
   Element identicalFunction;
   Element functionApplyMethod;
+  Element invokeOnMethod;
 
   Element get currentElement => _currentElement;
   withCurrentElement(Element element, f()) {
     Element old = currentElement;
     _currentElement = element;
     try {
       return f();
     } on CompilerCancelledException catch (ex) {
       throw;
     } on StackOverflowError catch (ex) {
@@ skipping 20 matching lines @@
   LibraryLoader libraryLoader;
   TreeValidatorTask validator;
   ResolverTask resolver;
   closureMapping.ClosureTask closureToClassMapper;
   TypeCheckerTask checker;
   ti.TypesTask typesTask;
   Backend backend;
   ConstantHandler constantHandler;
   EnqueueTask enqueuer;
 
   static const SourceString MAIN = const SourceString('main');

[ahe, 2012/10/29 12:14:05]

How about adding a TODO that these should be selectors?

   static const SourceString CALL_OPERATOR_NAME = const SourceString('call');
   static const SourceString NO_SUCH_METHOD = const SourceString('noSuchMethod');
+  static const int NO_SUCH_METHOD_ARG_COUNT = 1;
+  static const SourceString INVOKE_ON = const SourceString('invokeOn');
   static const SourceString RUNTIME_TYPE = const SourceString('runtimeType');
   static const SourceString START_ROOT_ISOLATE =
       const SourceString('startRootIsolate');
   bool enabledNoSuchMethod = false;
   bool enabledRuntimeType = false;
   bool enabledFunctionApply = false;
+  bool enabledInvokeOn = false;
 
   Stopwatch progress;
 
   static const int PHASE_SCANNING = 0;
   static const int PHASE_RESOLVING = 1;
   static const int PHASE_COMPILING = 2;
   int phase;
 
   bool compilationFailed = false;
 
@@ skipping 121 matching lines @@
     // TODO(ahe): Move this method to Enqueuer.
     if (enabledNoSuchMethod) return;
     if (identical(element.getEnclosingClass(), objectClass)) {
       enqueuer.resolution.registerDynamicInvocationOf(element);
       return;
     }
     enabledNoSuchMethod = true;
     Selector selector = new Selector.noSuchMethod();
     enqueuer.resolution.registerInvocation(NO_SUCH_METHOD, selector);
     enqueuer.codegen.registerInvocation(NO_SUCH_METHOD, selector);
+
+    Element createInvocationMirrorElement =
+        findHelper(const SourceString('createInvocationMirror'));

[ahe, 2012/10/29 12:14:05]

This looks specific to the JS backend.

+    enqueuer.resolution.addToWorkList(createInvocationMirrorElement);
+    enqueuer.codegen.addToWorkList(createInvocationMirrorElement);

[ahe, 2012/10/29 12:14:05]

This should only be added if it is really needed.

   }
 
   void enableIsolateSupport(LibraryElement element) {
     // TODO(ahe): Move this method to Enqueuer.
     isolateLibrary = element.patch;
     enqueuer.resolution.addToWorkList(isolateLibrary.find(START_ROOT_ISOLATE));
     enqueuer.resolution.addToWorkList(
         isolateLibrary.find(const SourceString('_currentIsolate')));
     enqueuer.resolution.addToWorkList(
         isolateLibrary.find(const SourceString('_callInIsolate')));
@@ skipping 31 matching lines @@
     }
     objectClass = lookupSpecialClass(const SourceString('Object'));
     boolClass = lookupSpecialClass(const SourceString('bool'));
     numClass = lookupSpecialClass(const SourceString('num'));
     intClass = lookupSpecialClass(const SourceString('int'));
     doubleClass = lookupSpecialClass(const SourceString('double'));
     stringClass = lookupSpecialClass(const SourceString('String'));
     functionClass = lookupSpecialClass(const SourceString('Function'));
     listClass = lookupSpecialClass(const SourceString('List'));
     mapClass = lookupSpecialClass(const SourceString('Map'));
+    jsInvocationMirrorClass =
+        lookupSpecialClass(const SourceString('JSInvocationMirror'));

[ahe, 2012/10/29 12:14:05]

This looks specific to the JS backend.

     closureClass = lookupSpecialClass(const SourceString('Closure'));
     dynamicClass = lookupSpecialClass(const SourceString('Dynamic_'));
     nullClass = lookupSpecialClass(const SourceString('Null'));
     types = new Types(this, dynamicClass);
     if (!coreLibValid) {
       cancel('core library does not contain required classes');
     }
   }
 
   void scanBuiltinLibraries() {
@@ skipping 12 matching lines @@
     addForeignFunctions(interceptorsLibrary);
 
     assertMethod = jsHelperLibrary.find(const SourceString('assertHelper'));
     identicalFunction = coreLibrary.find(const SourceString('identical'));
 
     initializeSpecialClasses();
 
     functionClass.ensureResolved(this);
     functionApplyMethod =
         functionClass.lookupLocalMember(const SourceString('apply'));
+    jsInvocationMirrorClass.ensureResolved(this);
+    invokeOnMethod = jsInvocationMirrorClass.lookupLocalMember(
+        const SourceString('invokeOn'));

[ahe, 2012/10/29 12:14:05]

This looks specific to the JS backend.

   }
 
   void loadCoreImplLibrary() {
     Uri coreImplUri = new Uri.fromComponents(scheme: 'dart', path: 'coreimpl');
     coreImplLibrary = libraryLoader.loadLibrary(coreImplUri, null, coreImplUri);
   }
 
   void importHelperLibrary(LibraryElement library) {
     if (jsHelperLibrary != null) {
       libraryLoader.importLibrary(library, jsHelperLibrary, null);
@@ skipping 441 matching lines @@
   // TODO(johnniwinther): Use [spannable] and [message] to provide better
   // information on assertion errors.
   if (condition is Function){
     condition = condition();
   }
   if (!condition && message != null) {
     print('assertion failed: $message');
   }
   return spannable != null && condition;
 }