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 // <experimental/type_traits> 12 13 // template<class B> struct negation; 14 // template<class B> 15 // constexpr bool negation_v = negation<B>::value; 16 17 #include <experimental/type_traits> 18 #include <cassert> 19 20 namespace ex = std::experimental; 21 22 struct True { static constexpr bool value = true; }; 23 struct False { static constexpr bool value = false; }; 24 25 int main() 26 { 27 static_assert (!ex::negation<std::true_type >::value, "" ); 28 static_assert ( ex::negation<std::false_type>::value, "" ); 29 30 static_assert (!ex::negation_v<std::true_type >, "" ); 31 static_assert ( ex::negation_v<std::false_type>, "" ); 32 33 static_assert (!ex::negation<True >::value, "" ); 34 static_assert ( ex::negation<False>::value, "" ); 35 36 static_assert (!ex::negation_v<True >, "" ); 37 static_assert ( ex::negation_v<False>, "" ); 38 39 static_assert ( ex::negation<ex::negation<std::true_type >>::value, "" ); 40 static_assert (!ex::negation<ex::negation<std::false_type>>::value, "" ); 41 } 42
