Generate tear-off closures dynamically.

dart/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
+    Closure,
     Null,
     Primitives,
     convertDartClosureToJS;
 import 'dart:_foreign_helper' show DART_CLOSURE_TO_JS,
                                    JS,
                                    JS_CREATE_ISOLATE,
                                    JS_CURRENT_ISOLATE_CONTEXT,
                                    JS_CURRENT_ISOLATE,
                                    JS_SET_CURRENT_ISOLATE,
                                    IsolateContext;
@@ skipping 520 matching lines @@
         throw new Exception(trace);
       }
     }
   }
 
   static void _consoleLog(msg) {
     JS("void", r"#.console.log(#)", globalThis, msg);
   }
 
   static _getJSFunctionFromName(String functionName) {
-    return JS("", "init.globalFunctions[#]", functionName);
+    return JS("", "init.globalFunctions[#]()", functionName);
   }
 
   /**
    * Get a string name for the function, if possible.  The result for
    * anonymous functions is browser-dependent -- it may be "" or "anonymous"
    * but you should probably not count on this.
    */
   static String _getJSFunctionName(Function f) {
-    return JS("String|Null", r"(#['$name'] || #)", f, null);
+    if (f is! Closure) return null;

[kasperl, 2013/11/29 10:10:55]

?:

[ahe, 2013/12/06 15:57:53]

Done.

+    return JS("String|Null", r'#.$name', f);
   }
 
   /** Create a new JavaScript object instance given its constructor. */
   static dynamic _allocate(var ctor) {
     return JS("", "new #()", ctor);
   }
 
   static SendPort spawnFunction(void topLevelFunction(message), message) {
     final name = _getJSFunctionName(topLevelFunction);
     if (name == null) {
@@ skipping 803 matching lines @@
       _handle = null;
     } else {
       throw new UnsupportedError("Canceling a timer.");
     }
   }
 
   bool get isActive => _handle != null;
 }
 
 bool hasTimer() => JS('', '#.setTimeout', globalThis) != null;