// Copyright (c) 2013, 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 = 2.9

import "package:expect/expect.dart";

class S {}

class M1 {}

class M2 {}

class M3 {}

class C = S with M1, M2, M3;

class D extends S with M1, M2, M3 {}

class S_M1 {}

class S_M1_M2 {}

main() {
  var c = new C();
  Expect.isTrue(c is C);
  Expect.isFalse(c is D);
  Expect.isTrue(c is S);
  Expect.isFalse(c is S_M1);
  Expect.isFalse(c is S_M1_M2);

  var d = new D();
  Expect.isFalse(d is C);
  Expect.isTrue(d is D);
  Expect.isTrue(d is S);
  Expect.isFalse(d is S_M1);
  Expect.isFalse(d is S_M1_M2);

  var sm = new S_M1();
  Expect.isFalse(sm is C);
  Expect.isFalse(sm is D);
  Expect.isFalse(sm is S);
  Expect.isTrue(sm is S_M1);
  Expect.isFalse(sm is S_M1_M2);

  var smm = new S_M1_M2();
  Expect.isFalse(smm is C);
  Expect.isFalse(smm is D);
  Expect.isFalse(smm is S);
  Expect.isFalse(smm is S_M1);
  Expect.isTrue(smm is S_M1_M2);
}