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