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 // reference_wrapper(T& t);
15 
16 #include <functional>
17 #include <cassert>
18 
19 class functor1
20     : public std::unary_function<int, char>
21 {
22 };
23 
24 template <class T>
25 void
test(T & t)26 test(T& t)
27 {
28     std::reference_wrapper<T> r(t);
29     assert(&r.get() == &t);
30 }
31 
f()32 void f() {}
33 
main()34 int main()
35 {
36     void (*fp)() = f;
37     test(fp);
38     test(f);
39     functor1 f1;
40     test(f1);
41     int i = 0;
42     test(i);
43     const int j = 0;
44     test(j);
45 }
46