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<const T> cref(reference_wrapper<T> t);
14 
15 #include <functional>
16 #include <cassert>
17 
18 #include "test_macros.h"
19 
20 int main(int, char**)
21 {
22     const int i = 0;
23     std::reference_wrapper<const int> r1 = std::cref(i);
24     std::reference_wrapper<const int> r2 = std::cref(r1);
25     assert(&r2.get() == &i);
26 
27   return 0;
28 }
29