#ifndef BOOST_MPL_NEXT_PRIOR_HPP_INCLUDED

 #define BOOST_MPL_NEXT_PRIOR_HPP_INCLUDED

 // Copyright Aleksey Gurtovoy 2000-2004

 //

 // 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/mpl for documentation.

 // $Source: /cvsroot/boost/boost/boost/mpl/next_prior.hpp,v $

 // $Date: 2004/09/17 06:09:38 $

 // $Revision: 1.3 $

 #include <boost/mpl/aux_/common_name_wknd.hpp>

 #include <boost/mpl/aux_/na_spec.hpp>

 #include <boost/mpl/aux_/lambda_support.hpp>

 namespace boost { namespace mpl {

 BOOST_MPL_AUX_COMMON_NAME_WKND(next)

 BOOST_MPL_AUX_COMMON_NAME_WKND(prior)

 template<

       typename BOOST_MPL_AUX_NA_PARAM(T)

     >

 struct next

 {

     typedef typename T::next type;

     BOOST_MPL_AUX_LAMBDA_SUPPORT(1,next,(T))

 };

 template<

       typename BOOST_MPL_AUX_NA_PARAM(T)

     >

 struct prior

 {

     typedef typename T::prior type;

     BOOST_MPL_AUX_LAMBDA_SUPPORT(1,prior,(T))

 };

 BOOST_MPL_AUX_NA_SPEC(1, next)

 BOOST_MPL_AUX_NA_SPEC(1, prior)

 }}

 #endif // BOOST_MPL_NEXT_PRIOR_HPP_INCLUDED