Version 1.2.0-dev.3.1

sdk/lib/_internal/lib/isolate_helper.dart

 // Copyright (c) 2012, 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 _isolate_helper;
 
 import 'dart:async';
 import 'dart:collection' show Queue, HashMap;
 import 'dart:isolate';
 import 'dart:_js_helper' show
@@ skipping 1025 matching lines @@
 
   operator[](var object) => null;
   void operator[]=(var object, var info) { }
 
   void reset() { }
   void cleanup() { }
 
 }
 
 /** Abstract visitor for dart objects that can be sent as isolate messages. */
-class _MessageTraverser {
+abstract class _MessageTraverser {
 
   _MessageTraverserVisitedMap _visited;
   _MessageTraverser() : _visited = new _MessageTraverserVisitedMap();
 
   /** Visitor's entry point. */
   traverse(var x) {
     if (isPrimitive(x)) return visitPrimitive(x);
     _visited.reset();
     var result;
     try {
@@ skipping 103 matching lines @@
     for (int i = 0; i < len; i++) {
       result[i] = _dispatch(list[i]);
     }
     return result;
   }
 
   visitSendPort(SendPort x) => throw new UnimplementedError();
 }
 
 /** Deserializes arrays created with [_Serializer]. */
-class _Deserializer {
+abstract class _Deserializer {
   Map<int, dynamic> _deserialized;
 
   _Deserializer();
 
   static bool isPrimitive(x) {
     return (x == null) || (x is String) || (x is num) || (x is bool);
   }
 
   deserialize(x) {
     if (isPrimitive(x)) return x;
@@ skipping 131 matching lines @@
       _handle = null;
     } else {
       throw new UnsupportedError("Canceling a timer.");
     }
   }
 
   bool get isActive => _handle != null;
 }
 
 bool hasTimer() => JS('', '#.setTimeout', globalThis) != null;