| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <experimental/optional> |
| |
| #ifdef __GNUC__ |
| #pragma GCC diagnostic ignored "-W#warnings" |
| #endif |
| #include <experimental/optional> |
| |
| #ifndef _LIBCPP_VERSION |
| #error _LIBCPP_VERSION not defined |
| #endif |
| |
| int main() {} |