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// explicit priority_queue(const Compare& x = Compare(), Container&& = Container()); // before C++20
12// priority_queue() : priority_queue(Compare()) {} // C++20
13// explicit priority_queue(const Compare& x) : priority_queue(x, Container()) {} // C++20
14
15#include <queue>
16#include <cassert>
17
18#include "test_macros.h"
19#include "test_allocator.h"
20#if TEST_STD_VER >= 11
21# include "test_convertible.h"
22#endif
23
24TEST_CONSTEXPR_CXX26 bool test() {
25 typedef std::vector<int, limited_allocator<int, 10> > Container;
26 typedef std::priority_queue<int, Container> Q;
27 Q q;
28 assert(q.size() == 0);
29 q.push(1);
30 q.push(2);
31 assert(q.size() == 2);
32 assert(q.top() == 2);
33
34#if TEST_STD_VER >= 11
35 // It should be explicit, so not convertible before C++20.
36 static_assert(test_convertible<Q>(), "");
37#endif
38
39 return true;
40}
41
42int main(int, char**) {
43 assert(test());
44#if TEST_STD_VER >= 26
45 static_assert(test());
46#endif
47
48 return 0;
49}
50

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