1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // <queue>
10 
11 // void swap(queue& q);
12 
13 #include <queue>
14 #include <cassert>
15 
16 template <class C>
17 C
18 make(int n)
19 {
20     C c;
21     for (int i = 0; i < n; ++i)
22         c.push(i);
23     return c;
24 }
25 
26 int main(int, char**)
27 {
28     std::queue<int> q1 = make<std::queue<int> >(5);
29     std::queue<int> q2 = make<std::queue<int> >(10);
30     std::queue<int> q1_save = q1;
31     std::queue<int> q2_save = q2;
32     q1.swap(q2);
33     assert(q1 == q2_save);
34     assert(q2 == q1_save);
35 
36   return 0;
37 }
38