protected void generateBindableImpl() {
    if (classDefinition.needsEventDispatcher(classScope.getProject())) {
      // Generate a EventDispatcher member, equivalent to:
      //   private var _bindingEventDispatcher : flash.events.EventDispatcher;
      //
      // Note that it is in a separate private namespace, so it won't conflict with user defined
      // private members

      // Add init code for the _bindingEventDispatcher to the ctor
      // this is the equivalent of:
      //   _bindingEventDispatcher = new flash.events.EventDispatcher(this);

      iinitInsns.addAll(BindableHelper.generateBindingEventDispatcherInit(itraits, false));
      BindableHelper.generateAddEventListener(classScope);
      BindableHelper.generateDispatchEvent(classScope);
      BindableHelper.generateHasEventListener(classScope);
      BindableHelper.generateRemoveEventListener(classScope);
      BindableHelper.generateWillTrigger(classScope);
    }

    if (classDefinition.needsStaticEventDispatcher(classScope.getProject())) {
      cinitInsns.addAll(BindableHelper.generateBindingEventDispatcherInit(ctraits, true));
      BindableHelper.generateStaticEventDispatcherGetter(classStaticScope);
    }
  }
  private void addAnyEmbeddedAsset() {
    ICompilerProject project = classScope.getProject();
    if (!(project instanceof CompilerProject)) return;

    EmbedData embedData =
        classDefinition.getEmbeddedAsset((CompilerProject) project, classScope.getProblems());
    if (embedData != null) classScope.getGlobalScope().getEmbeds().add(embedData);
  }
  /**
   * Check the class definition for various errors related to implemented interfaces, such as making
   * sure that all interface methods are implemented
   *
   * @param cls the class definition to check
   */
  void implementedInterfaceSemanticChecks(ClassDefinition cls) {
    Iterator<IInterfaceDefinition> it = cls.interfaceIterator(classScope.getProject());
    while (it.hasNext()) {
      IInterfaceDefinition interf = it.next();

      if (interf instanceof InterfaceDefinition) {
        ((InterfaceDefinition) interf)
            .validateClassImplementsAllMethods(
                classScope.getProject(), cls, classScope.getProblems());
      }
    }
  }
  protected void generateRequiredContingentDefinitions() {
    List<IDefinition> definitons = classDefinition.getContingentDefinitions();
    for (IDefinition definition : definitons) {
      if (!definition.isContingentNeeded(classScope.getProject())) continue;

      assert (definition instanceof VariableDefinition)
          : "The code generator only supports contigent variable definitions";

      final IDefinitionNode node = definition.getNode();
      declareVariable(
          (VariableNode) node,
          (VariableDefinition) definition,
          definition.isStatic(),
          definition instanceof IConstantDefinition,
          LexicalScope.noInitializer);
    }
  }
  /** Finish the class' definition. */
  void finishClassDefinition() {
    // the generation of instructions for variable initialization is delayed
    // until now, so we can add that initialization to the front of
    // the cinit instruction list.
    if (!staticVariableInitializers.isEmpty()) {
      InstructionList exisitingCinitInsns = null;
      if (!this.cinitInsns.isEmpty()) {
        exisitingCinitInsns = new InstructionList();
        exisitingCinitInsns.addAll(this.cinitInsns);
        this.cinitInsns = new InstructionList();
      }

      for (VariableNode var : staticVariableInitializers) generateInstructions(var, true);

      if (exisitingCinitInsns != null) this.cinitInsns.addAll(exisitingCinitInsns);
    }

    // add "goto_definition_help" metadata to user defined metadata.
    ITraitVisitor tv =
        classScope.getGlobalScope().traitsVisitor.visitClassTrait(TRAIT_Class, className, 0, cinfo);
    IMetaInfo[] metaTags = getAllMetaTags(classDefinition);

    // Add "goto definition help" metadata for the constructor.
    if (this.ctorFunction != null) {
      FunctionDefinition ctorDef = this.ctorFunction.getDefinition();
      MetaTag metaTag =
          MetaTag.createGotoDefinitionHelp(
              classDefinition,
              classDefinition.getContainingFilePath(),
              Integer.toString(ctorDef.getNameStart()),
              true);
      if (metaTag != null) metaTags = MetaTag.addMetaTag(metaTags, metaTag);
    }

    this.classScope.processMetadata(tv, metaTags);
    tv.visitEnd();

    // Need to do this before generating the CTOR as the generated code may result in insns that
    // need to be added to the ctor.
    generateBindableImpl();

    generateRequiredContingentDefinitions();

    addAnyEmbeddedAsset();

    // Make any vistEnd method calls
    // that were deferred.
    // callVisitEnds must be called on the same thread
    // that started code generation.  Since we don't generate
    // classes in parallel yet, we know that we are on the thread
    // that started code generation here.
    classScope.callVisitEnds();
    classStaticScope.callVisitEnds();

    //  Create the class' constructor function.
    if (this.ctorFunction != null) {
      MethodInfo mi =
          classScope
              .getGenerator()
              .generateFunction(this.ctorFunction, classScope, this.iinitInsns);

      if (mi != null) this.iinfo.iInit = mi;
    } else if (!this.iinitInsns.isEmpty()) {
      //  Synthesize a constructor.

      this.iinfo.iInit = new MethodInfo();
      MethodBodyInfo iinit = new MethodBodyInfo();
      iinit.setMethodInfo(this.iinfo.iInit);

      IMethodVisitor mv = emitter.visitMethod(this.iinfo.iInit);
      mv.visit();
      IMethodBodyVisitor mbv = mv.visitBody(iinit);
      InstructionList ctor_insns = new InstructionList();
      ctor_insns.addInstruction(OP_getlocal0);
      ctor_insns.addInstruction(OP_pushscope);

      ctor_insns.addAll(this.iinitInsns);

      //  Call the superclass' constructor after the instance
      //  init instructions; this doesn't seem like an abstractly
      //  correct sequence, but it's what ASC does.
      ctor_insns.addInstruction(OP_getlocal0);
      ctor_insns.addInstruction(OP_constructsuper, 0);

      ctor_insns.addInstruction(OP_returnvoid);
      mbv.visit();
      mbv.visitInstructionList(ctor_insns);
      mbv.visitEnd();
      mv.visitEnd();
    }

    //  If the class has static initialization
    //  logic, emit a cinit routine.
    if (!this.cinitInsns.isEmpty()) {
      InstructionList cinit_insns = new InstructionList();
      cinit_insns.addInstruction(OP_getlocal0);
      cinit_insns.addInstruction(OP_pushscope);

      //  TODO: Examine other end-of-function processing
      //  and ensure it's completed.
      this.classStaticScope.finishClassStaticInitializer(this.cinitInsns);
      cinit_insns.addAll(this.cinitInsns);

      cinit_insns.addInstruction(OP_returnvoid);

      this.classStaticScope.methodBodyVisitor.visitInstructionList(cinit_insns);
      this.classStaticScope.methodBodyVisitor.visitEnd();
      this.classStaticScope.methodVisitor.visitEnd();
    } else {
      //  Ensure nothing got dropped.
      assert (this.classStaticScope.methodBodyVisitor == null);
    }

    itraits.visitEnd();
    ctraits.visitEnd();

    cv.visitEnd();
  }
  /**
   * Constructor. Initializes the ClassDirectiveProcessor and its associated AET data structures.
   *
   * @param node - the AST that starts the class' definition in source; used for diagnostics.
   * @param class_definition - the class' definition
   * @param enclosing_scope - the immediately enclosing lexical scope.
   * @param emitter - the active ABC emitter.
   */
  ClassDirectiveProcessor(
      ICommonClassNode node,
      ClassDefinition class_definition,
      LexicalScope enclosing_scope,
      IABCVisitor emitter) {
    super(enclosing_scope.getProblems());

    this.emitter = emitter;
    this.definitionSource = node;
    assert (this.definitionSource != null) : "Class definition AST must be provided.";

    this.classScope = enclosing_scope.pushFrame();
    this.classStaticScope = enclosing_scope.pushFrame();

    if (node.getNodeID() == ASTNodeID.ClassID) {
      classScope.setInitialControlFlowRegionNode(((ClassNode) node).getScopedNode());
      classStaticScope.setInitialControlFlowRegionNode(((ClassNode) node).getScopedNode());
    }

    ICompilerProject project = classScope.getProject();

    // Set the class Name.
    this.classDefinition = class_definition;
    this.className = classDefinition.getMName(project);
    iinfo.name = className;

    // Check for a duplicate class name.
    switch (SemanticUtils.getMultiDefinitionType(this.classDefinition, project)) {
      case AMBIGUOUS:
        classScope.addProblem(
            new DuplicateClassDefinitionProblem(node, class_definition.getBaseName()));
        break;
      case NONE:
        break;
      default:
        assert false; // I don't think classes can have other type of multiple definitions
    }

    if (node instanceof BaseDefinitionNode) // test doesn't work for MXML, which is OK.
    {
      BaseDefinitionNode n = (BaseDefinitionNode) node;
      SemanticUtils.checkScopedToDefaultNamespaceProblem(classScope, n, classDefinition, null);
    }
    // Resolve the super class, checking that it exists,
    // that it is a class rather than an interface,
    // that it isn't final, and that it isn't the same as this class.
    ClassDefinition superclassDefinition =
        SemanticUtils.resolveBaseClass(node, class_definition, project, classScope.getProblems());

    // Check that the superclass isn't a forward reference, but only need to do this if both
    // definitions come from the same containing source.  getContainingFilePath() returns the file
    // from the ASFileScope, so no need to worry about included files.
    if (!classDefinition.isGeneratedEmbedClass()
        && classDefinition
            .getContainingFilePath()
            .equals(superclassDefinition.getContainingFilePath())) {
      // If the absolute offset in the class is less than the
      // offset of the super class, it must be a forward reference in the file
      int classOffset = classDefinition.getAbsoluteStart();
      int superClassOffset = superclassDefinition.getAbsoluteEnd();
      if (classOffset < superClassOffset)
        classScope.addProblem(
            new ForwardReferenceToBaseClassProblem(node, superclassDefinition.getQualifiedName()));
    }

    // Set the superclass Name.
    this.superclassName = superclassDefinition.getMName(project);
    iinfo.superName = superclassName;

    // Resolve the interfaces.
    IInterfaceDefinition[] interfaces =
        classDefinition.resolveImplementedInterfaces(project, classScope.getProblems());

    // Set the interface Names.
    int n_interfaces = interfaces.length;
    ArrayList<Name> interface_names = new ArrayList<Name>(n_interfaces);
    for (int i = 0; i < n_interfaces; i++) {
      InterfaceDefinition idef = (InterfaceDefinition) interfaces[i];
      if (idef != null) {
        Name interfaceName = ((InterfaceDefinition) interfaces[i]).getMName(project);
        interface_names.add(interfaceName);
      }
    }
    iinfo.interfaceNames = interface_names.toArray(new Name[interface_names.size()]);

    // Set the flags corresponding to 'final' and 'dynamic'.
    if (classDefinition.isFinal()) iinfo.flags |= ABCConstants.CLASS_FLAG_final;
    if (!classDefinition.isDynamic()) iinfo.flags |= ABCConstants.CLASS_FLAG_sealed;

    iinfo.protectedNs =
        ((NamespaceDefinition) classDefinition.getProtectedNamespaceReference()).getAETNamespace();

    this.cv = emitter.visitClass(iinfo, cinfo);
    cv.visit();

    this.itraits = cv.visitInstanceTraits();
    this.ctraits = cv.visitClassTraits();

    this.classScope.traitsVisitor = this.itraits;
    this.classStaticScope.traitsVisitor = this.ctraits;

    // Build an array of the names of all the ancestor classes.
    ArrayList<Name> ancestorClassNames = new ArrayList<Name>();

    // Walk the superclass chain, starting with this class
    // and (unless there are problems) ending with Object.
    // This will accomplish three things:
    // - find loops;
    // - build the array of names of ancestor classes;
    // - set the needsProtected flag if this class or any of its ancestor classes needs it.

    boolean needsProtected = false;

    //  Remember the most recently examined class in case there's a cycle in the superclass
    //  chain, in which case we'll need it to issue a diagnostic.
    ClassDefinition c = null;

    IClassDefinition.IClassIterator classIterator = classDefinition.classIterator(project, true);

    while (classIterator.hasNext()) {
      c = (ClassDefinition) classIterator.next();
      needsProtected |= c.getOwnNeedsProtected();
      if (c != classDefinition) ancestorClassNames.add(c.getMName(project));
    }

    // Report a loop in the superclass chain, such as A extends B and B extends A.
    // Note: A extends A was found previously by SemanticUtils.resolveBaseClass().
    if (classIterator.foundLoop())
      classScope.addProblem(new CircularTypeReferenceProblem(c, c.getQualifiedName()));

    // In the case of class A extends A, ancestorClassNames will be empty at this point.
    // Change it to be Object to prevent "Warning: Stack underflow" in the script init code below.
    if (ancestorClassNames.isEmpty()) {
      ClassDefinition objectDefinition =
          (ClassDefinition) project.getBuiltinType(IASLanguageConstants.BuiltinType.OBJECT);
      ancestorClassNames.add(objectDefinition.getMName(project));
    }

    // If this class or any of its ancestor classes needs the protected flag set, set it.
    if (needsProtected) iinfo.flags |= ABCConstants.CLASS_FLAG_protected;

    // Add the class initialization logic to the script init.
    // For class B extends A, where class A extends Object, this looks like
    // getscopeobject
    // findpropstrict Object
    // getproperty Object
    // pushscope
    // findpropstrict A
    // getproperty A
    // dup
    // pushscope
    // newclass
    // popscope
    // popscope
    // initproperty B
    InstructionList initInstructions = this.classScope.getInitInstructions();
    initInstructions.addInstruction(OP_getscopeobject, 0);

    // Push ancestor classes onto the scope stack.
    for (int i = ancestorClassNames.size() - 1; i >= 0; i--) {
      Name ancestorClassName = ancestorClassNames.get(i);
      initInstructions.addInstruction(OP_getlex, ancestorClassName);
      // The newclass instruction below also needs the superclass on the stack, so dup it
      if (i == 0) initInstructions.addInstruction(OP_dup);
      initInstructions.addInstruction(OP_pushscope);
    }

    initInstructions.addInstruction(OP_newclass, cinfo);

    for (int i = 0; i < ancestorClassNames.size(); i++)
      initInstructions.addInstruction(OP_popscope);

    initInstructions.addInstruction(OP_initproperty, className);

    implementedInterfaceSemanticChecks(class_definition);

    processResourceBundles(class_definition, project, classScope.getProblems());
  }