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// UNSUPPORTED: c++03, c++11, c++14
10
11// <functional>
12
13// template <class T>
14// reference_wrapper(T&) -> reference_wrapper<T>;
15
16#include <functional>
17
18int main(int, char**) {
19 int i = 0;
20 std::reference_wrapper ri(i);
21 static_assert(std::is_same_v<decltype(ri), std::reference_wrapper<int>>);
22 std::reference_wrapper ri2(ri);
23 static_assert(std::is_same_v<decltype(ri2), std::reference_wrapper<int>>);
24 const int j = 0;
25 std::reference_wrapper rj(j);
26 static_assert(std::is_same_v<decltype(rj), std::reference_wrapper<const int>>);
27 std::reference_wrapper rj2(rj);
28 static_assert(std::is_same_v<decltype(rj2), std::reference_wrapper<const int>>);
29
30 return 0;
31}
32

source code of libcxx/test/std/utilities/function.objects/refwrap/refwrap.const/deduct.pass.cpp