|  | // 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. | 
|  |  | 
|  | import "package:expect/expect.dart"; | 
|  |  | 
|  | class S<T> { | 
|  | s() { | 
|  | return T; | 
|  | } | 
|  | } | 
|  |  | 
|  | mixin M<T> { | 
|  | m() { | 
|  | return T; | 
|  | } | 
|  | } | 
|  |  | 
|  | mixin N<T> { | 
|  | n() { | 
|  | return T; | 
|  | } | 
|  | } | 
|  |  | 
|  | class C<U, V> extends S<Map<U, V>> with M<List<U>>, N<Set<V>> {} | 
|  |  | 
|  | main() { | 
|  | var c = new C<int, bool>(); | 
|  | Expect.isTrue(c is S<Map<int, bool>>); | 
|  | Expect.equals(Map<int, bool>, c.s()); | 
|  | Expect.isTrue(c is M<List<int>>); | 
|  | Expect.equals(List<int>, c.m()); | 
|  | Expect.isTrue(c is N<Set<bool>>); | 
|  | Expect.equals(Set<bool>, c.n()); | 
|  | } |