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 18 using std::experimental::optional; 19 20 struct X 21 { 22 private: 23 ~X() {} 24 }; 25 26 #endif // _LIBCPP_STD_VER > 11 27 28 int main() 29 { 30 #if _LIBCPP_STD_VER > 11 31 optional<X> opt; 32 #else 33 #error 34 #endif // _LIBCPP_STD_VER > 11 35 } 36
