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 
main()19 int 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