Support top-level field declaration and assignment in analyzer2dart.

pkg/analyzer2dart/lib/src/converted_world.dart

 // Copyright (c) 2014, 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.
 
 library analyzer2dart.convertedWorld;
 
 import 'dart:collection';
 
 import 'package:analyzer/analyzer.dart';
 import 'package:compiler/src/elements/elements.dart' as dart2js;
 import 'package:analyzer/src/generated/element.dart' as analyzer;
 import 'package:compiler/src/cps_ir/cps_ir_nodes.dart' as ir;
 
 import 'closed_world.dart';
 import 'element_converter.dart';
 import 'cps_generator.dart';
+import 'util.dart';
 
 /// A [ClosedWorld] converted to the dart2js element model.
 abstract class ConvertedWorld {
   Iterable<dart2js.LibraryElement> get libraries;
   Iterable<dart2js.AstElement> get resolvedElements;
   Iterable<dart2js.ClassElement> get instantiatedClasses;
   dart2js.FunctionElement get mainFunction;
   ir.Node getIr(dart2js.Element element);
 
 }
@@ skipping 21 matching lines @@
   _ConvertedWorldImpl convertedWorld = new _ConvertedWorldImpl(
       converter.convertElement(closedWorld.mainFunction));
 
   void convert(analyzer.Element analyzerElement, AstNode node) {
     // Skip conversion of SDK sources since we don't generate code for it
     // anyway.
     if (analyzerElement.source.isInSystemLibrary) return;
 
     dart2js.AstElement dart2jsElement =
         converter.convertElement(analyzerElement);
-    CpsGeneratingVisitor visitor =
-        new CpsGeneratingVisitor(converter, analyzerElement);
-    ir.Node cpsNode = node.accept(visitor);
+    CpsElementVisitor visitor = new CpsElementVisitor(converter, node);
+    ir.Node cpsNode = analyzerElement.accept(visitor);
     if (cpsNode != null) {
       convertedWorld.executableElements[dart2jsElement] = cpsNode;
     } else {
-      visitor.giveUp(node,
-          'No CPS node generated for $analyzerElement (${node.runtimeType}).');
+      String message =
+         'No CPS node generated for $analyzerElement (${node.runtimeType}).';
+      reportSourceMessage(analyzerElement.source, node, message);
+      throw new UnimplementedError(message);
     }
   }
 
   closedWorld.executableElements.forEach(convert);
   closedWorld.variables.forEach(convert);
   closedWorld.fields.forEach(convert);
 
   return convertedWorld;
 }
-