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// <optional> 11 12// T shall be an object type and shall satisfy the requirements of Destructible 13 14#include <experimental/optional> 15 16#if _LIBCPP_STD_VER > 11 17 18using std::experimental::optional; 19 20struct X 21{ 22 ~X() noexcept(false) {} 23}; 24 25#endif // _LIBCPP_STD_VER > 11 26 27int main() 28{ 29#if _LIBCPP_STD_VER > 11 30 optional<X> opt; 31#else 32#error 33#endif // _LIBCPP_STD_VER > 11 34} 35