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// priority_queue();
12
13// template <class T, class Container, class Compare>
14// void swap(priority_queue<T, Container, Compare>& x,
15// priority_queue<T, Container, Compare>& y);
16
17#include <queue>
18#include <cassert>
19
20#include "test_macros.h"
21
22TEST_CONSTEXPR_CXX26 bool test() {
23 std::priority_queue<int> q1;
24 std::priority_queue<int> q2;
25 q1.push(1);
26 q1.push(3);
27 q1.push(2);
28 swap(q1, q2);
29 assert(q1.empty());
30 assert(q2.size() == 3);
31 assert(q2.top() == 3);
32
33 return true;
34}
35
36int main(int, char**) {
37 assert(test());
38#if TEST_STD_VER >= 26
39 static_assert(test());
40#endif
41
42 return 0;
43}
44

source code of libcxx/test/std/containers/container.adaptors/priority.queue/priqueue.special/swap.pass.cpp