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 // template<Returnable R, class T, CopyConstructible... Args>
12 // unspecified mem_fn(R (T::* pm)(Args...) volatile);
13
14 #include <functional>
15 #include <cassert>
16
17 #include "test_macros.h"
18
19 struct A
20 {
test0A21 char test0() volatile {return 'a';}
test1A22 char test1(int) volatile {return 'b';}
test2A23 char test2(int, double) volatile {return 'c';}
24 };
25
26 template <class F>
27 void
test0(F f)28 test0(F f)
29 {
30 {
31 A a;
32 assert(f(a) == 'a');
33 A* ap = &a;
34 assert(f(ap) == 'a');
35 volatile A* cap = &a;
36 assert(f(cap) == 'a');
37 const F& cf = f;
38 assert(cf(ap) == 'a');
39 }
40 }
41
42 template <class F>
43 void
test1(F f)44 test1(F f)
45 {
46 {
47 A a;
48 assert(f(a, 1) == 'b');
49 A* ap = &a;
50 assert(f(ap, 2) == 'b');
51 volatile A* cap = &a;
52 assert(f(cap, 2) == 'b');
53 const F& cf = f;
54 assert(cf(ap, 2) == 'b');
55 }
56 }
57
58 template <class F>
59 void
test2(F f)60 test2(F f)
61 {
62 {
63 A a;
64 assert(f(a, 1, 2) == 'c');
65 A* ap = &a;
66 assert(f(ap, 2, 3.5) == 'c');
67 volatile A* cap = &a;
68 assert(f(cap, 2, 3.5) == 'c');
69 const F& cf = f;
70 assert(cf(ap, 2, 3.5) == 'c');
71 }
72 }
73
main(int,char **)74 int main(int, char**)
75 {
76 test0(std::mem_fn(&A::test0));
77 test1(std::mem_fn(&A::test1));
78 test2(std::mem_fn(&A::test2));
79
80 return 0;
81 }
82