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 queue(Container&& = Container()); // before C++20
12// queue() : queue(Container()) {} // C++20
13// explicit queue(Container&&); // before 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
24int main(int, char**)
25{
26 typedef std::vector<int, limited_allocator<int, 10> > Container;
27 typedef std::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.front() == 1);
34 assert(q.back() == 2);
35
36#if TEST_STD_VER >= 11
37 // It should be explicit, so not convertible before C++20.
38 static_assert(test_convertible<Q>(), "");
39#endif
40
41 return 0;
42}
43

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