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// UNSUPPORTED: c++98, c++03, c++11
11#include <functional>
12#include <string>
13
14template <class _Tp>
15struct is_transparent
16{
17private:
18    struct __two {char __lx; char __lxx;};
19    template <class _Up> static __two __test(...);
20    template <class _Up> static char __test(typename _Up::is_transparent* = 0);
21public:
22    static const bool value = sizeof(__test<_Tp>(0)) == 1;
23};
24
25
26int main () {
27    static_assert ( !is_transparent<std::bit_and<int>>::value, "" );
28    static_assert ( !is_transparent<std::bit_and<std::string>>::value, "" );
29    static_assert (  is_transparent<std::bit_and<void>>::value, "" );
30    static_assert (  is_transparent<std::bit_and<>>::value, "" );
31
32    static_assert ( !is_transparent<std::bit_or<int>>::value, "" );
33    static_assert ( !is_transparent<std::bit_or<std::string>>::value, "" );
34    static_assert (  is_transparent<std::bit_or<void>>::value, "" );
35    static_assert (  is_transparent<std::bit_or<>>::value, "" );
36
37    static_assert ( !is_transparent<std::bit_xor<int>>::value, "" );
38    static_assert ( !is_transparent<std::bit_xor<std::string>>::value, "" );
39    static_assert (  is_transparent<std::bit_xor<void>>::value, "" );
40    static_assert (  is_transparent<std::bit_xor<>>::value, "" );
41
42    static_assert ( !is_transparent<std::bit_not<int>>::value, "" );
43    static_assert ( !is_transparent<std::bit_not<std::string>>::value, "" );
44    static_assert (  is_transparent<std::bit_not<void>>::value, "" );
45    static_assert (  is_transparent<std::bit_not<>>::value, "" );
46
47    return 0;
48}
49