Only generate assert in checked mode.

lib/compiler/implementation/tree/nodes.dart

Index: lib/compiler/implementation/tree/nodes.dart
===================================================================
--- lib/compiler/implementation/tree/nodes.dart	(revision 8394)
+++ lib/compiler/implementation/tree/nodes.dart	(working copy)
@@ -270,6 +270,10 @@
   bool get isPostfix() => argumentsNode is Postfix;
   bool get isIndex() =>
       isOperator && selector.asOperator().source.stringValue === '[]';
+  bool get isCall() {
+    Token end = getEndToken();

[ahe, 2012/06/08 06:56:16]

I don't like calling getEndToken to determine this. Isn't this essentially
"!isPropertyAccess"?

[ngeoffray, 2012/06/08 09:40:58]

As discussed, changed the code to !isPropertyAccess && !isOperator

+    return end !== null && end.stringValue === ')';
+  }
 
   Token getBeginToken() {
     if (isPrefix && !isIndex) return selector.getBeginToken();