Chris@16: // Copyright (C) 2003, Fernando Luis Cacciola Carballal.
Chris@101: // Copyright (C) 2014 Andrzej Krzemienski.
Chris@16: //
Chris@16: // Use, modification, and distribution is subject to the Boost Software
Chris@16: // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: //
Chris@16: // See http://www.boost.org/libs/optional for documentation.
Chris@16: //
Chris@16: // You are welcome to contact the author at:
Chris@16: //  fernando_cacciola@hotmail.com
Chris@16: //
Chris@16: #ifndef BOOST_NONE_T_17SEP2003_HPP
Chris@16: #define BOOST_NONE_T_17SEP2003_HPP
Chris@16: 
Chris@16: namespace boost {
Chris@16: 
Chris@101: #ifdef BOOST_OPTIONAL_USE_OLD_DEFINITION_OF_NONE
Chris@16: namespace detail { struct none_helper{}; }
Chris@16: typedef int detail::none_helper::*none_t ;
Chris@101: #else
Chris@101: class none_t {};
Chris@101: #endif
Chris@16: 
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #endif
Chris@16: