1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// <queue>
11
12// priority_queue();
13
14// void swap(priority_queue& q);
15
16#include <queue>
17#include <cassert>
18
19int main()
20{
21    std::priority_queue<int> q1;
22    std::priority_queue<int> q2;
23    q1.push(1);
24    q1.push(3);
25    q1.push(2);
26    q1.swap(q2);
27    assert(q1.empty());
28    assert(q2.size() == 3);
29    assert(q2.top() == 3);
30}
31