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 main(int,char **)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