| // 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 Closure { | 
 |   var x; | 
 |   Closure(val) : this.x = val; | 
 |  | 
 |   foo() { | 
 |     return () { | 
 |       return x; | 
 |     }; | 
 |   } | 
 |  | 
 |   bar() { | 
 |     return () { | 
 |       return toto(); | 
 |     }; | 
 |   } | 
 |  | 
 |   toto() { | 
 |     return x + 1; | 
 |   } | 
 |  | 
 |   nestedClosure() { | 
 |     var f = () { | 
 |       return x; | 
 |     }; | 
 |     return () { | 
 |       return f() + 2; | 
 |     }; | 
 |   } | 
 | } | 
 |  | 
 | main() { | 
 |   var c = new Closure(499); | 
 |   var f = c.foo(); | 
 |   Expect.equals(499, f()); | 
 |   Expect.equals(500, c.bar()()); | 
 |   Expect.equals(501, c.nestedClosure()()); | 
 | } |