blob: a71319abe27165c080da3642e06faf3e0d31777d [file] [log] [blame]
// 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.
import "package:expect/expect.dart";
class A {}
class B extends A {}
class C implements B {}
int inscrutable(int x) => x == 0 ? 0 : x | inscrutable(x & (x - 1));
main() {
var things = [new A(), new B(), new C()];
var a = things[inscrutable(0)];
Expect.isTrue(a is A);
Expect.isFalse(a is B);
Expect.isFalse(a is C);
var b = things[inscrutable(1)];
Expect.isTrue(b is A);
Expect.isTrue(b is B);
Expect.isFalse(b is C);
var c = things[inscrutable(2)];
Expect.isTrue(c is A);
Expect.isTrue(c is B);
Expect.isTrue(c is C);