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 // struct is_placeholder
13 
14 #include <functional>
15 
16 template <int Expected, class T>
17 void
test(const T &)18 test(const T&)
19 {
20     static_assert(std::is_placeholder<T>::value == Expected, "");
21 }
22 
23 struct C {};
24 
main()25 int main()
26 {
27     test<1>(std::placeholders::_1);
28     test<2>(std::placeholders::_2);
29     test<3>(std::placeholders::_3);
30     test<4>(std::placeholders::_4);
31     test<5>(std::placeholders::_5);
32     test<6>(std::placeholders::_6);
33     test<7>(std::placeholders::_7);
34     test<8>(std::placeholders::_8);
35     test<9>(std::placeholders::_9);
36     test<10>(std::placeholders::_10);
37     test<0>(4);
38     test<0>(5.5);
39     test<0>('a');
40     test<0>(C());
41 }
42