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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 <class... ArgTypes>
15 //   requires Callable<T, ArgTypes&&...>
16 //   Callable<T, ArgTypes&&...>::result_type
17 //   operator()(ArgTypes&&... args) const;
18 
19 #include <functional>
20 #include <cassert>
21 
22 // member data pointer:  cv qualifiers should transfer from argument to return type
23 
24 struct A_int_1
25 {
A_int_1A_int_126     A_int_1() : data_(5) {}
27 
28     int data_;
29 };
30 
31 void
test_int_1()32 test_int_1()
33 {
34     // member data pointer
35     {
36     int A_int_1::*fp = &A_int_1::data_;
37     std::reference_wrapper<int A_int_1::*> r1(fp);
38     A_int_1 a;
39     assert(r1(a) == 5);
40     r1(a) = 6;
41     assert(r1(a) == 6);
42     const A_int_1* ap = &a;
43     assert(r1(ap) == 6);
44     r1(ap) = 7;
45     assert(r1(ap) == 7);
46     }
47 }
48 
main()49 int main()
50 {
51     test_int_1();
52 }
53