| // (C) Copyright John Maddock 2018 |
| |
| // Use, modification and distribution are subject to the |
| // Boost Software License, Version 1.0. (See accompanying file |
| // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| |
| // See http://www.boost.org/libs/config for more information. |
| |
| // MACRO: BOOST_NO_CXX17_HDR_OPTIONAL |
| // TITLE: C++17 header <optional> unavailable |
| // DESCRIPTION: The standard library does not supply C++17 header <optional> |
| |
| #include <optional> |
| |
| namespace boost_no_cxx17_hdr_optional { |
| |
| int test() |
| { |
| using std::optional; |
| return 0; |
| } |
| |
| } |