1 // Copyright (C) 2003, Fernando Luis Cacciola Carballal. 2 // 3 // Use, modification, and distribution is subject to the Boost Software 4 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at 5 // http://www.boost.org/LICENSE_1_0.txt) 6 // 7 // See http://www.boost.org/libs/optional for documentation. 8 // 9 // You are welcome to contact the author at: 10 // fernando_cacciola@hotmail.com 11 // 12 #ifndef BOOST_NONE_T_17SEP2003_HPP 13 #define BOOST_NONE_T_17SEP2003_HPP 14 15 namespace boost { 16 17 namespace detail { struct none_helper{}; } 18 19 typedef int detail::none_helper::*none_t ; 20 21 } // namespace boost 22 23 #endif 24 25