1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // <functional>
11 
12 // reference_wrapper
13 
14 // template <ObjectType T> reference_wrapper<const T> cref(reference_wrapper<T> t);
15 
16 #include <functional>
17 #include <cassert>
18 
main()19 int main()
20 {
21     const int i = 0;
22     std::reference_wrapper<const int> r1 = std::cref(i);
23     std::reference_wrapper<const int> r2 = std::cref(r1);
24     assert(&r2.get() == &i);
25 }
26