|  | // 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"; | 
|  |  | 
|  | int inscrutable(int x) => x == 0 ? 0 : x | inscrutable(x & (x - 1)); | 
|  |  | 
|  | main() { | 
|  | var things = [0, double.infinity, double.negativeInfinity]; | 
|  | var first = things[1]; | 
|  | var second = things[2]; | 
|  | Expect.isFalse(first is int); | 
|  | Expect.isFalse(second is int); | 
|  | Expect.isTrue(first is double); | 
|  | Expect.isTrue(second is double); | 
|  | } |