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
main()16 int main()
17 {
18 #if _LIBCPP_STD_VER > 11
19 using std::experimental::optional;
20
21 optional<void> opt;
22 #else
23 #error
24 #endif // _LIBCPP_STD_VER > 11
25 }
26