// 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.

// Test that type variables are available in closures.

class A<T> {
  A();

  A.bar() {
    g() {
      new A<T>();
    }
    g();
  }

  foo() {
    g() {
      return new A<T>();
    }
    return g();
  }
}

main() {
  Expect.isTrue(new A<int>().foo() is A<int>);
  Expect.isTrue(new A<int>.bar().foo() is A<int>);
}
