Implement spawnFunction from the new isolate api.

lib/isolate/isolate_api.dart

Index: lib/isolate/isolate_api.dart
===================================================================
--- lib/isolate/isolate_api.dart	(revision 5367)
+++ lib/isolate/isolate_api.dart	(working copy)
@@ -2,6 +2,12 @@
 // 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 IsolateSpawnException implements Exception {
+  const IsolateSpawnException(String this._s);
+  String toString() => "IsolateSpawnException: '$_s'";
+  final String _s;
+}

[siva, 2012/03/13 19:45:21]

By defining it here are you making IsolateSpawnException a first class type and
part of the Isolate API?

I don't know what the consensus is on making Exception types part of the library
API...

[turnidge, 2012/03/13 21:23:37]

No idea what the consensus is.  Is it okay to add it for now and hide it later?

+
 /**
  * The initial [ReceivePort] available by default for this isolate. This
  * [ReceivePort] is created automatically and it is commonly used to establish