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
main(int,char **)24 int main(int, char**)
25 {
26 typedef std::vector<int, limited_allocator<int, 10> > Container;
27 typedef std::priority_queue<int, Container> Q;
28 Q q;
29 assert(q.size() == 0);
30 q.push(1);
31 q.push(2);
32 assert(q.size() == 2);
33 assert(q.top() == 2);
34
35 #if TEST_STD_VER >= 11
36 // It should be explicit, so not convertible before C++20.
37 static_assert(test_convertible<Q>(), "");
38 #endif
39
40 return 0;
41 }
42