// Copyright (C) 2003, Fernando Luis Cacciola Carballal.

 //

 // Use, modification, and distribution is 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/lib/optional for documentation.

 //

 // You are welcome to contact the author at:

 //  fernando_cacciola@hotmail.com

 //

 #ifndef BOOST_DETAIL_NONE_T_17SEP2003_HPP

 #define BOOST_DETAIL_NONE_T_17SEP2003_HPP

 namespace boost {

 namespace detail {

 struct none_helper{};

 typedef int none_helper::*none_t ;

 } // namespace detail

 } // namespace boost

 #endif