// Copyright (c) 2012, 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.
// Dart test for legally self referencing function type alias.

typedef F(List<F> x);

typedef D C();

class D {
  C foo() { }
  D bar() { }
}

main() {
  var f = (List x) { };
  Expect.isTrue(f is F);
  var g = (List<F> x) { };
  Expect.isTrue(g is F);
  var d = new D();
  Expect.isTrue(d.foo is !C);
  Expect.isTrue(d.bar is C);
}
