Ensure that hashCode and runtimeType work on null.

lib/compiler/implementation/lib/interceptors.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('dart:_interceptors');
 
 #import('coreimpl.dart');
 #import('js_helper.dart');
 
 add$1(var receiver, var value) {
@@ skipping 599 matching lines @@
 
 /**
  * This is the [Jenkins hash function][1] but using masking to keep
  * values in SMI range.
  *
  * [1]: http://en.wikipedia.org/wiki/Jenkins_hash_function
  */
 hashCode(receiver) {
   // TODO(ahe): This method shouldn't have to use JS. Update when our
   // optimizations are smarter.
+  if (receiver === null) return 0;
   if (receiver is num) return JS('int', r'# & 0x1FFFFFFF', receiver);
   if (receiver is !String) return UNINTERCEPTED(receiver.hashCode());

[ngeoffray, 2012/09/27 08:36:54]

Don't forget JS array too.

[Lasse Reichstein Nielsen, 2012/09/27 09:55:37]

And bool. Yey.

   int hash = 0;
   int length = JS('int', r'#.length', receiver);
   for (int i = 0; i < length; i++) {
     hash = 0x1fffffff & (hash + JS('int', r'#.charCodeAt(#)', receiver, i));
     hash = 0x1fffffff & (hash + JS('int', r'# << #', 0x0007ffff & hash, 10));
     hash ^= hash >> 6;
   }
   hash = 0x1fffffff & (hash + JS('int', r'# << #', 0x03ffffff & hash, 3));
   hash ^= hash >> 11;
   return 0x1fffffff & (hash + JS('int', r'# << #', 0x00003fff & hash, 15));
@@ skipping 12 matching lines @@
 isEven(receiver) {
   if (receiver is !int) return UNINTERCEPTED(receiver.isEven());
   return (receiver & 1) === 0;
 }
 
 isOdd(receiver) {
   if (receiver is !int) return UNINTERCEPTED(receiver.isOdd());
   return (receiver & 1) === 1;
 }
 
-get$toString(receiver) => () => toString(receiver);
-
 get$runtimeType(receiver) {
   if (receiver is int) {
     return getOrCreateCachedRuntimeType('int');
   } else if (receiver is String) {
     return getOrCreateCachedRuntimeType('String');
   } else if (receiver is double) {
     return getOrCreateCachedRuntimeType('double');
+  } else if (receiver === null) {
+    return getOrCreateCachedRuntimeType('Null');
   } else if (isJsArray(receiver)) {
     return getOrCreateCachedRuntimeType('List');
   } else {
     return UNINTERCEPTED(receiver.runtimeType);
   }
 }
+
+// TODO(lrn): These getters should be generated added automatically for all

[ngeoffray, 2012/09/27 08:36:54]

remove 'added'

[Lasse Reichstein Nielsen, 2012/09/27 09:55:37]

Done.

+// methods.

[ngeoffray, 2012/09/27 08:36:54]

methods -> interceptors

[Lasse Reichstein Nielsen, 2012/09/27 09:55:37]

"intercepted methods"

+get$toString(receiver) => () => toString(receiver);
+
+get$hashCode(receiver) => () => hashCode(receiver);