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 // class function<R(ArgTypes...)>
13 
14 // R operator()(ArgTypes... args) const
15 
16 #include <functional>
17 #include <new>
18 #include <cstdlib>
19 #include <cassert>
20 
21 // 0 args, return void
22 
23 int count = 0;
24 
25 void f_void_0()
26 {
27     ++count;
28 }
29 
30 struct A_void_0
31 {
32     void operator()() {++count;}
33 };
34 
35 void
36 test_void_0()
37 {
38     int save_count = count;
39     // function
40     {
41     std::function<void ()> r1(f_void_0);
42     r1();
43     assert(count == save_count+1);
44     save_count = count;
45     }
46     // function pointer
47     {
48     void (*fp)() = f_void_0;
49     std::function<void ()> r1(fp);
50     r1();
51     assert(count == save_count+1);
52     save_count = count;
53     }
54     // functor
55     {
56     A_void_0 a0;
57     std::function<void ()> r1(a0);
58     r1();
59     assert(count == save_count+1);
60     save_count = count;
61     }
62 }
63 
64 int main()
65 {
66     test_void_0();
67 }
68