transparent.pass.cpp revision 98760c18f85bafd98dde7a309e1b0e677abd47d8 
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#include <functional>
11#include <string>
12
13template <class _Tp>
14struct is_transparent
15{
16private:
17    struct __two {char __lx; char __lxx;};
18    template <class _Up> static __two __test(...);
19    template <class _Up> static char __test(typename _Up::is_transparent* = 0);
20public:
21    static const bool value = sizeof(__test<_Tp>(0)) == 1;
22};
23
24
25int main () {
26#if _LIBCPP_STD_VER > 11
27
28    static_assert ( !is_transparent<std::plus<int>>::value, "" );
29    static_assert ( !is_transparent<std::plus<std::string>>::value, "" );
30    static_assert (  is_transparent<std::plus<void>>::value, "" );
31    static_assert (  is_transparent<std::plus<>>::value, "" );
32
33    static_assert ( !is_transparent<std::minus<int>>::value, "" );
34    static_assert ( !is_transparent<std::minus<std::string>>::value, "" );
35    static_assert (  is_transparent<std::minus<void>>::value, "" );
36    static_assert (  is_transparent<std::minus<>>::value, "" );
37
38    static_assert ( !is_transparent<std::multiplies<int>>::value, "" );
39    static_assert ( !is_transparent<std::multiplies<std::string>>::value, "" );
40    static_assert (  is_transparent<std::multiplies<void>>::value, "" );
41    static_assert (  is_transparent<std::multiplies<>>::value, "" );
42
43    static_assert ( !is_transparent<std::divides<int>>::value, "" );
44    static_assert ( !is_transparent<std::divides<std::string>>::value, "" );
45    static_assert (  is_transparent<std::divides<void>>::value, "" );
46    static_assert (  is_transparent<std::divides<>>::value, "" );
47
48    static_assert ( !is_transparent<std::modulus<int>>::value, "" );
49    static_assert ( !is_transparent<std::modulus<std::string>>::value, "" );
50    static_assert (  is_transparent<std::modulus<void>>::value, "" );
51    static_assert (  is_transparent<std::modulus<>>::value, "" );
52
53    static_assert ( !is_transparent<std::negate<int>>::value, "" );
54    static_assert ( !is_transparent<std::negate<std::string>>::value, "" );
55    static_assert (  is_transparent<std::negate<void>>::value, "" );
56    static_assert (  is_transparent<std::negate<>>::value, "" );
57
58#endif
59
60    return 0;
61    }
62