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);
    }
  }
  /**
   * 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());
      }
    }
  }
  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);
  }
  /** Declare a function. TODO: static vs. instance. */
  @Override
  void declareFunction(FunctionNode func) {
    func.parseFunctionBody(classScope.getProblems());

    final FunctionDefinition funcDef = func.getDefinition();

    final boolean is_constructor = func.isConstructor();

    functionSemanticChecks(func);

    //  Save the constructor function until
    //  we've seen all the instance variables
    //  that might need initialization.
    if (is_constructor) {
      if (this.ctorFunction == null) this.ctorFunction = func;
      else {
        // If we already have a ctor, must be multiply defined. Ignore it and generate problem
        String name = this.className.getBaseName();
        classScope.addProblem(new MultipleContructorDefinitionsProblem(func, name));
      }
    } else {
      LexicalScope ls = funcDef.isStatic() ? classStaticScope : classScope;

      MethodInfo mi = classScope.getGenerator().generateFunction(func, ls, null);

      if (mi != null) {
        Name funcName = funcDef.getMName(classScope.getProject());
        ITraitVisitor tv =
            ls.traitsVisitor.visitMethodTrait(
                functionTraitKind(func, TRAIT_Method), funcName, 0, mi);

        if (funcName != null)
          classScope
              .getMethodBodySemanticChecker()
              .checkFunctionForConflictingDefinitions(func, funcDef);

        if (!funcDef.isStatic())
          if (funcDef.getNamespaceReference()
              instanceof NamespaceDefinition.IProtectedNamespaceDefinition)
            this.iinfo.flags |= ABCConstants.CLASS_FLAG_protected;

        ls.processMetadata(tv, getAllMetaTags(funcDef));

        if (func.hasModifier(ASModifier.FINAL)) tv.visitAttribute(Trait.TRAIT_FINAL, Boolean.TRUE);
        if (func.hasModifier(ASModifier.OVERRIDE))
          tv.visitAttribute(Trait.TRAIT_OVERRIDE, Boolean.TRUE);
        tv.visitEnd();
      }
    }
  }
  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);
    }
  }
  /** Declare a variable. */
  @Override
  void declareVariable(VariableNode var) {
    verifyVariableModifiers(var);

    VariableDefinition varDef = (VariableDefinition) var.getDefinition();

    boolean is_static = var.hasModifier(ASModifier.STATIC);
    boolean is_const = SemanticUtils.isConst(var, classScope.getProject());

    final ICompilerProject project = this.classScope.getProject();

    ICodeGenerator codeGenerator = classScope.getGenerator();
    IExpressionNode assignedValueNode = var.getAssignedValueNode();
    IConstantValue constantValue = codeGenerator.generateConstantValue(assignedValueNode, project);

    //  initializer is null if no constant value
    //  can be generated, and null is the correct value for "no value."
    Object initializer = constantValue != null ? constantValue.getValue() : null;

    // Reducing the constant value may have produced problems in the
    // LexicalScope used for constant reduction. Transfer them over
    // to the LexicalScope for this class.
    Collection<ICompilerProblem> problems =
        constantValue != null ? constantValue.getProblems() : null;
    if (problems != null) classScope.addProblems(problems);

    final MethodBodySemanticChecker checker =
        MethodBodySemanticCheckerFactory.getChecker(this.classScope); // CO-5148

    DefinitionBase varType = (DefinitionBase) varDef.resolveType(project);

    Object transformed_initializer = null;

    if ((initializer != null) && (varType != null)) {
      transformed_initializer =
          checker
              .checkInitialValue(
                  var,
                  new Binding(null, varType.getMName(this.classScope.getProject()), varType),
                  new PooledValue(initializer))
              .getValue();
    } else {
      transformed_initializer = initializer;
    }

    ITraitVisitor tv = declareVariable(var, varDef, is_static, is_const, transformed_initializer);
    if (is_static) this.classStaticScope.processMetadata(tv, getAllMetaTags(varDef));
    else this.classScope.processMetadata(tv, getAllMetaTags(varDef));
    tv.visitEnd();

    //  Generate variable initializers and append them to the
    //  proper initialization list.
    if (transformed_initializer == null && var.getAssignedValueNode() != null) {
      // Emit initialization instructions for non-static vars.  Static var
      // instructions will be emitted during finishClassDefinition()
      if (is_static) staticVariableInitializers.add(var);
      else generateInstructions(var, false);
    } else {
      checker.checkClassField(var, is_static);
      //  Massive kludge -- grovel over chained variable decls and add them one by one
      for (int i = 0; i < var.getChildCount(); i++) {
        IASNode candidate = var.getChild(i);

        if (candidate instanceof VariableNode) {
          declareVariable((VariableNode) candidate);
        }
      }
    }
  }
  /**
   * This method performs the semantic analysis of a function declared in a class.
   *
   * @param node the FunctionNode to semantically analyze
   */
  void functionSemanticChecks(FunctionNode node) {
    verifyFunctionModifiers(node);

    FunctionDefinition func = node.getDefinition();

    Collection<ICompilerProblem> problems = classScope.getProblems();

    // code model has some peculiar ideas about what makes a function a constructor or not
    boolean looks_like_ctor = func.isConstructor();
    looks_like_ctor |=
        func.getBaseName() != null
            && this.className != null
            && func.getBaseName().equals(this.className.getBaseName());

    if (!looks_like_ctor && (func.getBaseName() != null)) {
      SemanticUtils.checkScopedToDefaultNamespaceProblem(
          classScope, node, func, this.classDefinition.getQualifiedName());
    }
    if (looks_like_ctor) {
      // If a constructor has a namespace as part of it's declaration, it must be declared public.
      // It is ok to omit the namespace
      // We must check the AST, as CM treats all ctors as public no matter what the user typed in
      // so the FunctionDefinition will always be in the public namespace
      if (node.getActualNamespaceNode() != null
          && node.getActualNamespaceNode().getName() != IASKeywordConstants.PUBLIC)
        problems.add(new ConstructorMustBePublicProblem(node.getActualNamespaceNode()));

      // A constructor cannot be static
      if (func.isStatic()) problems.add(new ConstructorIsStaticProblem(node));

      // A constructor cannot declare a return type, other than void.
      IExpressionNode returnTypeExpression = node.getReturnTypeNode();
      if (returnTypeExpression != null) {
        // We cannot check whether node.resolveReturnType() returns the definition
        // for the void type, because  the return type of a constructor is considered
        // to be the class of the object being constructed, rather than void.
        // So instead we simply check whether the type annotation was void.
        boolean returnTypeIsVoid = false;
        if (returnTypeExpression instanceof ILanguageIdentifierNode) {
          LanguageIdentifierKind kind = ((ILanguageIdentifierNode) returnTypeExpression).getKind();
          if (kind == LanguageIdentifierKind.VOID) returnTypeIsVoid = true;
        }
        if (!returnTypeIsVoid) {
          ICompilerProblem problem =
              new ConstructorCannotHaveReturnTypeProblem(returnTypeExpression);
          problems.add(problem);
        }
      }

      // Is it a getter or setter that appears to be the constructor?
      if (func instanceof IAccessorDefinition)
        problems.add(new ConstructorIsGetterSetterProblem(node.getNameExpressionNode()));
    } else if (!func.isStatic()) {
      // We have to find the (potentially) overriden function whether we are an override or
      // not/
      FunctionDefinition override = func.resolveOverriddenFunction(classScope.getProject());
      if (func.isOverride()) {
        if (override == null) {
          // Didn't find the function we are supposed to be overriding
          problems.add(new OverrideNotFoundProblem(node.getNameExpressionNode()));
        } else {
          if (!func.hasCompatibleSignature(override, classScope.getProject())) {
            // Signatures didn't match
            problems.add(new IncompatibleOverrideProblem(node.getNameExpressionNode()));
          }
          if (override.isFinal()) {
            // overriding final
            problems.add(new OverrideFinalProblem(node.getNameExpressionNode()));
          }
        }
      } else if (override != null) {
        // found overriden function, but function not marked as override
        problems.add(new FunctionNotMarkedOverrideProblem(node.getNameExpressionNode()));
      }
    }
  }
  /**
   * 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());
  }