closure calls (just the invocation part).

frog/leg/elements/elements.dart

 // Copyright (c) 2011, 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('elements');
 
 #import('../tree/tree.dart');
 #import('../scanner/scannerlib.dart');
 #import('../leg.dart');  // TODO(karlklose): we only need type.
 #import('../util/util.dart');
@@ skipping 338 matching lines @@
     return (element != null)
            && !element.isInstanceMember()
            && (element.kind === ElementKind.FIELD);
   }
 
   static bool isInstanceMethod(Element element) {
     return (element != null)
            && element.isInstanceMember()
            && (element.kind === ElementKind.FUNCTION);
   }
+
+  static bool isClosureSend(Send send, TreeElements elements) {
+    if (send.isPropertyAccess) return false;
+    if (send.receiver !== null) return false;
+    Element element = elements[send];
+    // (o)() or foo()().
+    if (element === null && send.selector.asIdentifier() === null) return true;
+    // foo() with foo a local or a parameter.
+    if (element.kind === ElementKind.VARIABLE ||

[kasperl, 2012/01/05 12:52:19]

Should we have element.isVariable() and element.isParameter()? Maybe just return
isVar || isParam?

[floitsch, 2012/01/05 13:59:20]

Done.

+        element.kind === ElementKind.PARAMETER) {
+      return true;
+    }
+    return false;
+  }
 }