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 // template<Returnable R, class T, CopyConstructible... Args>
13 // unspecified mem_fn(R (T::* pm)(Args...));
14
15 #include <functional>
16 #include <cassert>
17
18 struct A
19 {
test0A20 char test0() {return 'a';}
test1A21 char test1(int) {return 'b';}
test2A22 char test2(int, double) {return 'c';}
23 };
24
25 template <class F>
26 void
test0(F f)27 test0(F f)
28 {
29 {
30 A a;
31 assert(f(a) == 'a');
32 A* ap = &a;
33 assert(f(ap) == 'a');
34 const F& cf = f;
35 assert(cf(ap) == 'a');
36 }
37 }
38
39 template <class F>
40 void
test1(F f)41 test1(F f)
42 {
43 {
44 A a;
45 assert(f(a, 1) == 'b');
46 A* ap = &a;
47 assert(f(ap, 2) == 'b');
48 const F& cf = f;
49 assert(cf(ap, 2) == 'b');
50 }
51 }
52
53 template <class F>
54 void
test2(F f)55 test2(F f)
56 {
57 {
58 A a;
59 assert(f(a, 1, 2) == 'c');
60 A* ap = &a;
61 assert(f(ap, 2, 3.5) == 'c');
62 const F& cf = f;
63 assert(cf(ap, 2, 3.5) == 'c');
64 }
65 }
66
main()67 int main()
68 {
69 test0(std::mem_fn(&A::test0));
70 test1(std::mem_fn(&A::test1));
71 test2(std::mem_fn(&A::test2));
72 }
73