boost/none.hpp

// Copyright (C) 2003, Fernando Luis Cacciola Carballal.
//
// Distributed under 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/optional for documentation.
//
// You are welcome to contact the author at:
//  fernando_cacciola@hotmail.com
//
#ifndef BOOST_NONE_17SEP2003_HPP
#define BOOST_NONE_17SEP2003_HPP

#include "boost/none_t.hpp"

// NOTE: Borland users have to include this header outside any precompiled headers
// (bcc<=5.64 cannot include instance data in a precompiled header)
//  -- * To be verified, now that there's no unnamed namespace

namespace boost {

none_t const none = (static_cast<none_t>(0)) ;

} // namespace boost

#endif

Boost C++ Libraries

boost/none.hpp