Add JavaScript AST.

lib/compiler/implementation/namer.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.
 
 /**
  * Assigns JavaScript identifiers to Dart variables, class-names and members.
  */
 class Namer {
   final Compiler compiler;
 
@@ skipping 24 matching lines @@
   final String STATIC_CLOSURE_NAME_NAME = @'$name';
   final SourceString CLOSURE_INVOCATION_NAME = const SourceString(@'$call');
 
 
   String closureInvocationName(Selector selector) {
     // TODO(floitsch): mangle, while not conflicting with instance names.
     return instanceMethodInvocationName(null, CLOSURE_INVOCATION_NAME,
                                         selector);
   }
 
+  String breakLabelName(LabelElement label) {
+    return '\$${label.labelName}\$${label.target.nestingLevel}';
+  }
+
+  String implicitBreakLabelName(TargetElement target) {
+    return '\$${target.nestingLevel}';
+  }
+
+  // We sometimes handle continue targets differently from break targets,
+  // so we have special continue-only labels.
+  String continueLabelName(LabelElement label) {
+    return 'c\$${label.labelName}\$${label.target.nestingLevel}';
+  }
+
+  String implicitContinueLabelName(TargetElement target) {
+    return 'c\$${target.nestingLevel}';
+  }
+
   /** Returns a non-unique name for the given closure element. */
   String closureName(Element element) {
     List<String> parts = <String>[];
     SourceString ownName = element.name;
     if (ownName == null || ownName.stringValue == "") {
       parts.add("anon");
     } else {
       parts.add(ownName.slowToString());
     }
     for (Element enclosingElement = element.enclosingElement;
@@ skipping 219 matching lines @@
   }
 
   String safeName(String name) {
     if (jsReserved.contains(name) || name.startsWith('\$')) {
       name = "\$$name";
       assert(!jsReserved.contains(name));
     }
     return name;
   }
 }