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 // <optional> 12 13 // struct nullopt_t{see below}; 14 // constexpr nullopt_t nullopt(unspecified); 15 16 // [optional.nullopt]/2: 17 // Type nullopt_t shall not have a default constructor or an initializer-list constructor. 18 // It shall not be an aggregate and shall be a literal type. 19 // Constant nullopt shall be initialized with an argument of literal type. 20 21 #include <optional> 22 #include "test_macros.h" 23 24 int main() 25 { 26 std::nullopt_t n = {}; 27 } 28
