| // 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 program testing closures. | 
 |  | 
 | import "package:expect/expect.dart"; | 
 |  | 
 | class A { | 
 |   operator -() => this; | 
 |  | 
 |   foo(x) { | 
 |     -a; | 
 |     if (x) return true; | 
 |     return false; | 
 |   } | 
 |  | 
 |   loop1(x) { | 
 |     -a; | 
 |     while (x) return true; | 
 |     return false; | 
 |   } | 
 |  | 
 |   loop2(x) { | 
 |     -a; | 
 |     for (; x;) return true; | 
 |     return false; | 
 |   } | 
 |  | 
 |   loop3(x) { | 
 |     -a; | 
 |     var i = 0; | 
 |     do { | 
 |       if (i++ == 1) return false; | 
 |     } while (!x); | 
 |     return true; | 
 |   } | 
 | } | 
 |  | 
 | var a; | 
 |  | 
 | main() { | 
 |   a = new A(); | 
 |   Expect.isTrue(a.foo(true)); | 
 |   Expect.isTrue(a.loop1(true)); | 
 |   Expect.isTrue(a.loop2(true)); | 
 |   Expect.isTrue(a.loop3(true)); | 
 | } |