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dart/frog/leg/scanner/class_element_parser.dart

 // Copyright (c) 2011, 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 ClassElementParser extends PartialParser {
   ClassElementParser(Listener listener) : super(listener);
 
   Token parseClassBody(Token token) => fullParseClassBody(token);
 }
 
 class PartialClassElement extends ClassElement {
   final Token beginToken;
   final Token endToken;
   Node cachedNode;
 
   PartialClassElement(SourceString name,
                       Token this.beginToken,
                       Token this.endToken,
                       CompilationUnitElement enclosing)
     : super(name, enclosing);
 
   ClassNode parseNode(Canceler canceler, Logger logger) {
     if (cachedNode != null) return cachedNode;
     MemberListener listener = new MemberListener(canceler, logger, this);
     Parser parser = new ClassElementParser(listener);
     Token token = parser.parseClass(beginToken);
     assert(token === endToken.next);
     cachedNode = listener.popNode();
     assert(listener.nodes.isEmpty());
-    assert(listener.topLevelElements.isEmpty());
     return cachedNode;
   }
 
   Token position() => beginToken;
 }
 
 class MemberListener extends NodeListener {
   final ClassElement enclosingElement;
 
   MemberListener(Canceler canceler, Logger logger,
@@ skipping 39 matching lines @@
         recoverableError('illegal modifier', token: getOrSet);
       }
       kind = ElementKind.GENERATIVE_CONSTRUCTOR;
     } else if (getOrSet !== null) {
       kind = (getOrSet.stringValue === 'get')
              ? ElementKind.GETTER : ElementKind.SETTER;
     }
     Element memberElement =
         new PartialFunctionElement(name, beginToken, endToken,
                                    kind, method.modifiers, enclosingElement);
-    enclosingElement.addMember(memberElement);
+    enclosingElement.addMember(memberElement, canceler);
   }
 
   void endFactoryMethod(Token factoryKeyword, Token periodBeforeName,
                         Token endToken) {
     super.endFactoryMethod(factoryKeyword, periodBeforeName, endToken);
     FunctionExpression method = popNode();
     pushNode(null);
     // TODO(ahe): Named constructors.
     if (method.name.asIdentifier() == null) {
       canceler.cancel('Qualified factory names not implemented', node: method);
     }
     Identifier name = method.name;
     ElementKind kind = ElementKind.FUNCTION;
     Element memberElement =
         new PartialFunctionElement(name.source, factoryKeyword, endToken, kind,
                                    method.modifiers, enclosingElement);
-    enclosingElement.addMember(memberElement);
+    enclosingElement.addMember(memberElement, canceler);
   }
 
   void endFields(int count, Token beginToken, Token endToken) {
     super.endFields(count, beginToken, endToken);
     VariableDefinitions variableDefinitions = popNode();
     Modifiers modifiers = variableDefinitions.modifiers;
     pushNode(null);
     void buildFieldElement(SourceString name, Element fields) {
       Element element = new VariableElement(
           name, fields, ElementKind.FIELD, enclosingElement);
-      enclosingElement.addMember(element);
+      enclosingElement.addMember(element, canceler);
     }
     buildFieldElements(modifiers, variableDefinitions.definitions,
                        buildFieldElement, beginToken, endToken);
   }
 
   void endInitializer(Token assignmentOperator) {
     pushNode(null); // Super expects an expression, but
                     // ClassElementParser just skips expressions.
     super.endInitializer(assignmentOperator);
   }
 
   void endInitializers(int count, Token beginToken, Token endToken) {
     pushNode(null);
   }
 }