1 // -*- C++ -*- 2 //===----------------------------------------------------------------------===// 3 // 4 // The LLVM Compiler Infrastructure 5 // 6 // This file is dual licensed under the MIT and the University of Illinois Open 7 // Source Licenses. See LICENSE.TXT for details. 8 // 9 //===----------------------------------------------------------------------===// 10 11 // UNSUPPORTED: c++98, c++03, c++11, c++14 12 13 // <variant> 14 15 // struct monostate {}; 16 17 #include <type_traits> 18 #include <variant> 19 20 int main() { 21 using M = std::monostate; 22 static_assert(std::is_trivially_default_constructible<M>::value, ""); 23 static_assert(std::is_trivially_copy_constructible<M>::value, ""); 24 static_assert(std::is_trivially_copy_assignable<M>::value, ""); 25 static_assert(std::is_trivially_destructible<M>::value, ""); 26 constexpr M m{}; 27 ((void)m); 28 } 29
