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, c++14
11// type_traits
12
13// template<class... B> struct disjunction;                           // C++17
14// template<class... B>
15//   constexpr bool disjunction_v = disjunction<B...>::value;         // C++17
16
17#include <type_traits>
18#include <cassert>
19
20struct True  { static constexpr bool value = true; };
21struct False { static constexpr bool value = false; };
22
23int main()
24{
25    static_assert (!std::disjunction<>::value, "" );
26    static_assert ( std::disjunction<std::true_type >::value, "" );
27    static_assert (!std::disjunction<std::false_type>::value, "" );
28
29    static_assert (!std::disjunction_v<>, "" );
30    static_assert ( std::disjunction_v<std::true_type >, "" );
31    static_assert (!std::disjunction_v<std::false_type>, "" );
32
33    static_assert ( std::disjunction<std::true_type,  std::true_type >::value, "" );
34    static_assert ( std::disjunction<std::true_type,  std::false_type>::value, "" );
35    static_assert ( std::disjunction<std::false_type, std::true_type >::value, "" );
36    static_assert (!std::disjunction<std::false_type, std::false_type>::value, "" );
37
38    static_assert ( std::disjunction_v<std::true_type,  std::true_type >, "" );
39    static_assert ( std::disjunction_v<std::true_type,  std::false_type>, "" );
40    static_assert ( std::disjunction_v<std::false_type, std::true_type >, "" );
41    static_assert (!std::disjunction_v<std::false_type, std::false_type>, "" );
42
43    static_assert ( std::disjunction<std::true_type,  std::true_type,  std::true_type >::value, "" );
44    static_assert ( std::disjunction<std::true_type,  std::false_type, std::true_type >::value, "" );
45    static_assert ( std::disjunction<std::false_type, std::true_type,  std::true_type >::value, "" );
46    static_assert ( std::disjunction<std::false_type, std::false_type, std::true_type >::value, "" );
47    static_assert ( std::disjunction<std::true_type,  std::true_type,  std::false_type>::value, "" );
48    static_assert ( std::disjunction<std::true_type,  std::false_type, std::false_type>::value, "" );
49    static_assert ( std::disjunction<std::false_type, std::true_type,  std::false_type>::value, "" );
50    static_assert (!std::disjunction<std::false_type, std::false_type, std::false_type>::value, "" );
51
52    static_assert ( std::disjunction_v<std::true_type,  std::true_type,  std::true_type >, "" );
53    static_assert ( std::disjunction_v<std::true_type,  std::false_type, std::true_type >, "" );
54    static_assert ( std::disjunction_v<std::false_type, std::true_type,  std::true_type >, "" );
55    static_assert ( std::disjunction_v<std::false_type, std::false_type, std::true_type >, "" );
56    static_assert ( std::disjunction_v<std::true_type,  std::true_type,  std::false_type>, "" );
57    static_assert ( std::disjunction_v<std::true_type,  std::false_type, std::false_type>, "" );
58    static_assert ( std::disjunction_v<std::false_type, std::true_type,  std::false_type>, "" );
59    static_assert (!std::disjunction_v<std::false_type, std::false_type, std::false_type>, "" );
60
61    static_assert ( std::disjunction<True >::value, "" );
62    static_assert (!std::disjunction<False>::value, "" );
63
64    static_assert ( std::disjunction_v<True >, "" );
65    static_assert (!std::disjunction_v<False>, "" );
66}
67