1 2#ifndef BOOST_MPL_NEXT_PRIOR_HPP_INCLUDED 3#define BOOST_MPL_NEXT_PRIOR_HPP_INCLUDED 4 5// Copyright Aleksey Gurtovoy 2000-2004 6// 7// Distributed under the Boost Software License, Version 1.0. 8// (See accompanying file LICENSE_1_0.txt or copy at 9// http://www.boost.org/LICENSE_1_0.txt) 10// 11// See http://www.boost.org/libs/mpl for documentation. 12 13// $Id: next_prior.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ 14// $Date: 2008-10-10 23:19:02 -0700 (Fri, 10 Oct 2008) $ 15// $Revision: 49267 $ 16 17#include <boost/mpl/aux_/common_name_wknd.hpp> 18#include <boost/mpl/aux_/na_spec.hpp> 19#include <boost/mpl/aux_/lambda_support.hpp> 20 21namespace boost { namespace mpl { 22 23BOOST_MPL_AUX_COMMON_NAME_WKND(next) 24BOOST_MPL_AUX_COMMON_NAME_WKND(prior) 25 26template< 27 typename BOOST_MPL_AUX_NA_PARAM(T) 28 > 29struct next 30{ 31 typedef typename T::next type; 32 BOOST_MPL_AUX_LAMBDA_SUPPORT(1,next,(T)) 33}; 34 35template< 36 typename BOOST_MPL_AUX_NA_PARAM(T) 37 > 38struct prior 39{ 40 typedef typename T::prior type; 41 BOOST_MPL_AUX_LAMBDA_SUPPORT(1,prior,(T)) 42}; 43 44BOOST_MPL_AUX_NA_SPEC(1, next) 45BOOST_MPL_AUX_NA_SPEC(1, prior) 46 47}} 48 49#endif // BOOST_MPL_NEXT_PRIOR_HPP_INCLUDED 50