Add a test for operator[] unparse.

lib/compiler/implementation/tree/unparser.dart

Index: lib/compiler/implementation/tree/unparser.dart
diff --git a/lib/compiler/implementation/tree/unparser.dart b/lib/compiler/implementation/tree/unparser.dart
index 67df031e46cd78c9fe67c3c20cac0b7aaf25dcf6..1f44f4d39cb325276594c2396c0a61b139c453c9 100644
--- a/lib/compiler/implementation/tree/unparser.dart
+++ b/lib/compiler/implementation/tree/unparser.dart
@@ -87,6 +87,11 @@ class Unparser implements Visitor {
       sb.add(' ');
     }
     visit(node.name);
+    // TODO(antonm): that's a workaround as currently FunctionExpression
+    // names are modelled with Send and it emits operator[] as only
+    // operator, without [] which are expected to be emitted with
+    // arguments.
+    if (node.name is Send && node.name.isIndex) sb.add('[]');

[ahe, 2012/06/19 16:42:45]

Actually, I think this would be slightly cleaner:

Send send = node.name.asSend();
if (send !== null) {
  assert(send is !SendSet);
  visit(send.receiver);
  visit(send.selector);
} else {
  visit(node.name);
}

WDYT?

[Anton Muhin, 2012/06/19 18:02:05]

Done.

     visit(node.parameters);
     visit(node.body);
   }