boost/mpl/next_prior.hpp

0001
0002 #ifndef BOOST_MPL_NEXT_PRIOR_HPP_INCLUDED
0003 #define BOOST_MPL_NEXT_PRIOR_HPP_INCLUDED
0004
0005 // Copyright Aleksey Gurtovoy 2000-2004
0006 //
0007 // Distributed under the Boost Software License, Version 1.0.
0008 // (See accompanying file LICENSE_1_0.txt or copy at
0009 // http://www.boost.org/LICENSE_1_0.txt)
0010 //
0011 // See http://www.boost.org/libs/mpl for documentation.
0012
0013 // $Id$
0014 // $Date$
0015 // $Revision$
0016
0017 #include <boost/mpl/aux_/common_name_wknd.hpp>
0018 #include <boost/mpl/aux_/na_spec.hpp>
0019 #include <boost/mpl/aux_/lambda_support.hpp>
0020
0021 namespace boost { namespace mpl {
0022
0023 BOOST_MPL_AUX_COMMON_NAME_WKND(next)
0024 BOOST_MPL_AUX_COMMON_NAME_WKND(prior)
0025
0026 template<
0027       typename BOOST_MPL_AUX_NA_PARAM(T)
0028     >
0029 struct next
0030 {
0031     typedef typename T::next type;
0032     BOOST_MPL_AUX_LAMBDA_SUPPORT(1,next,(T))
0033 };
0034
0035 template<
0036       typename BOOST_MPL_AUX_NA_PARAM(T)
0037     >
0038 struct prior
0039 {
0040     typedef typename T::prior type;
0041     BOOST_MPL_AUX_LAMBDA_SUPPORT(1,prior,(T))
0042 };
0043
0044 BOOST_MPL_AUX_NA_SPEC(1, next)
0045 BOOST_MPL_AUX_NA_SPEC(1, prior)
0046
0047 }}
0048
0049 #endif // BOOST_MPL_NEXT_PRIOR_HPP_INCLUDED