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// <functional>
10
11// reference_wrapper
12
13// template <ObjectType T> reference_wrapper<T> ref(T& t);
14
15#include <functional>
16#include <cassert>
17
18#include "test_macros.h"
19
20TEST_CONSTEXPR_CXX20 bool test()
21{
22 int i = 0;
23 std::reference_wrapper<int> r = std::ref(i);
24 assert(&r.get() == &i);
25 return true;
26}
27
28int main(int, char**)
29{
30 test();
31#if TEST_STD_VER > 17
32 static_assert(test());
33#endif
34
35 return 0;
36}
37

source code of libcxx/test/std/utilities/function.objects/refwrap/refwrap.helpers/ref_1.pass.cpp