Use the typedef arity to know how to invoke a closure given by the dom.

dart/lib/compiler/implementation/elements/elements.dart

Index: dart/lib/compiler/implementation/elements/elements.dart
===================================================================
--- dart/lib/compiler/implementation/elements/elements.dart	(revision 8049)
+++ dart/lib/compiler/implementation/elements/elements.dart	(working copy)
@@ -356,12 +356,23 @@
 class TypedefElement extends Element {
   final Token token;
   Type cachedType;
+  Node cachedNode;

[ahe, 2012/05/29 12:32:08]

The type should be Typedef.

[ngeoffray, 2012/05/29 13:06:28]

Done.

 
   TypedefElement(SourceString name, Element enclosing, this.token)
       : super(name, ElementKind.TYPEDEF, enclosing) {
     cachedType = new InterfaceType(this);
   }
 
+  Node parseNode(Compiler compiler) {

[ahe, 2012/05/29 12:32:08]

I would prefer if this followed the "PartialFunctionElement" approach and kept
the parseNode method in the parser, that is, scanner/listener.dart.

[ngeoffray, 2012/05/29 13:06:28]

Done.

+    if (cachedNode !== null) return cachedNode;
+    NodeListener listener = new NodeListener(compiler, enclosingElement);
+    Parser parser = new Parser(listener);
+    Token token = parser.parseTopLevelDeclaration(token);
+    cachedNode = listener.popNode();
+    assert(listener.nodes.isEmpty());

[kasperl, 2012/05/29 12:16:24]

Maybe cancel with an internal error instead?

[ahe, 2012/05/29 12:32:08]

This is consistent with other code.

+    return cachedNode;
+  }
+
   position() => findMyName(token);
 
   Type computeType(Compiler compiler) => cachedType;