Handle implicit closure of toString.

dart/frog/leg/lib/js_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('js_helper');
 
 #import('coreimpl.dart');
 
 #source('constant_map.dart');
 #source('date_helper.dart');
@@ skipping 1342 matching lines @@
  * Represents the type Dynamic. The compiler treats this specially.
  */
 interface Dynamic {
 }
 
 /**
  * Represents the type of Null. The compiler treats this specially.
  */
 class Null {
   factory Null() {
-    throw UnsupportedOperationException('new Null()');
+    throw new UnsupportedOperationException('new Null()');
   }
 }
+
+// TODO(ahe): We should automatically generate these.

[ngeoffray, 2012/03/26 08:47:32]

Just talked with Lasse about this. It's not so trivial to automatically generate
those. Right now, we have a very simple scheme to recognize if something must be
intercepted. Doing something more elegant requires either:

a) Build a table before starting compiling that contains all methods that must
be intercepted (eg methods on List,String,num interfaces), or

b) Have a tool that generates the dart file containing the getters.

Since we already write the interceptors, as well as the ones that have default
values, it doesn't seem that bad to manually write a getter just after the
interceptor. It will make things very easy, including optional arguments:

builtin$get$indexOf(receiver) {
 return (value, [int startIndex]) => builtin$indexOf(receiver, value,
startIndex);
}

[ahe, 2012/03/26 09:24:57]

I have removed the TODO for now and continued the discussion in a new thread.

+builtin$get$toString(receiver) => () => builtin$toString$0(receiver);