Generative constructors in the new dart backend.

pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.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 dart2js.ir_nodes_sexpr;
 
 import '../util/util.dart';
 import 'cps_ir_nodes.dart';
 
 /// A [Decorator] is a function used by [SExpressionStringifier] to augment the
@@ skipping 22 matching lines @@
 
   /// Main entry point for creating a [String] from a [Node].  All recursive
   /// calls must go through this method.
   String visit(Node node) {
     String s = super.visit(node);
     return (decorator == null) ? s : decorator(node, s);
   }
 
   String visitFunctionDefinition(FunctionDefinition node) {
     String name = node.element.name;
-    namer.useReturnName(node.returnContinuation);
+    namer.useReturnName(node.body.returnContinuation);
     String closureVariables = node.closureVariables.isEmpty
         ? ''
         : '{${node.closureVariables.map(namer.defineClosureName).join(' ')}} ';
     String parameters = node.parameters.map(visit).join(' ');
     String body = indentBlock(() => visit(node.body));
     return '$indentation(FunctionDefinition $name $closureVariables'
            '($parameters return)\n$body)';
   }
 
   String visitFieldDefinition(FieldDefinition node) {
     String name = node.element.name;
     if (node.hasInitializer) {
-      namer.useReturnName(node.returnContinuation);
+      namer.useReturnName(node.body.returnContinuation);
       String body = indentBlock(() => visit(node.body));
       return '$indentation(FieldDefinition $name (return)\n'
              '$body)';
     } else {
       return '$indentation(FieldDefinition $name)';
     }
   }
 
   String visitLetPrim(LetPrim node) {
     String name = newValueName(node.primitive);
@@ skipping 186 matching lines @@
   String useReturnName(Continuation node) {
     assert(!_names.containsKey(node) || _names[node] == 'return');
     return _names[node] = 'return';
   }
 
   String getName(Node node) {
     assert(_names.containsKey(node));
     return _names[node];
   }
 }