closure calls (just the invocation part).

frog/leg/typechecker.dart

Index: frog/leg/typechecker.dart
diff --git a/frog/leg/typechecker.dart b/frog/leg/typechecker.dart
index eb66109af2e1a7039636b0a498533df5155f2755..d8eb06d1cb83c77d70600e9c4ff9a8786f279c6e 100644
--- a/frog/leg/typechecker.dart
+++ b/frog/leg/typechecker.dart
@@ -307,7 +307,15 @@ class TypeCheckerVisitor implements Visitor<Type> {
   }
 
   Type visitSend(Send node) {
-    Identifier selector = node.selector;
+    if (Elements.isClosureSend(node, elements)) {
+      print(new Unparser(true).unparse(node));
+      print(node.receiver);
+      print(node.selector);
+      // TODO(karlklose): Finish implementation.
+      return types.dynamicType;      
+    }
+
+    Identifier selector = node.selector.asIdentifier();
     String name = selector.source.stringValue;
 
     if (node.isOperator) {