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 // type_traits 11 12 // bool_constant 13 14 #include <type_traits> 15 #include <cassert> 16 17 int main() 18 { 19 #if __cplusplus > 201402L 20 typedef std::bool_constant<true> _t; 21 static_assert(_t::value, ""); 22 static_assert((std::is_same<_t::value_type, bool>::value), ""); 23 static_assert((std::is_same<_t::type, _t>::value), ""); 24 static_assert((_t() == true), ""); 25 26 typedef std::bool_constant<false> _f; 27 static_assert(!_f::value, ""); 28 static_assert((std::is_same<_f::value_type, bool>::value), ""); 29 static_assert((std::is_same<_f::type, _f>::value), ""); 30 static_assert((_f() == false), ""); 31 #endif 32 } 33
