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 // $Id$ 14 // $Date$ 15 // $Revision$ 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 21 namespace boost { namespace mpl { 22 23 BOOST_MPL_AUX_COMMON_NAME_WKND(next) 24 BOOST_MPL_AUX_COMMON_NAME_WKND(prior) 25 26 template< 27 typename BOOST_MPL_AUX_NA_PARAM(T) 28 > 29 struct next 30 { 31 typedef typename T::next type; 32 BOOST_MPL_AUX_LAMBDA_SUPPORT(1,next,(T)) 33 }; 34 35 template< 36 typename BOOST_MPL_AUX_NA_PARAM(T) 37 > 38 struct prior 39 { 40 typedef typename T::prior type; 41 BOOST_MPL_AUX_LAMBDA_SUPPORT(1,prior,(T)) 42 }; 43 44 BOOST_MPL_AUX_NA_SPEC(1, next) 45 BOOST_MPL_AUX_NA_SPEC(1, prior) 46 47 }} 48 49 #endif // BOOST_MPL_NEXT_PRIOR_HPP_INCLUDED 50