boost/mpl/reverse_fold.hpp

0001
0002 #ifndef BOOST_MPL_REVERSE_FOLD_HPP_INCLUDED
0003 #define BOOST_MPL_REVERSE_FOLD_HPP_INCLUDED
0004
0005 // Copyright Aleksey Gurtovoy 2001-2004
0006 // Copyright David Abrahams 2001-2002
0007 //
0008 // Distributed under the Boost Software License, Version 1.0.
0009 // (See accompanying file LICENSE_1_0.txt or copy at
0010 // http://www.boost.org/LICENSE_1_0.txt)
0011 //
0012 // See http://www.boost.org/libs/mpl for documentation.
0013
0014 // $Id$
0015 // $Date$
0016 // $Revision$
0017
0018 #include <boost/mpl/begin_end.hpp>
0019 #include <boost/mpl/O1_size.hpp>
0020 #include <boost/mpl/arg.hpp>
0021 #include <boost/mpl/aux_/reverse_fold_impl.hpp>
0022 #include <boost/mpl/aux_/na_spec.hpp>
0023
0024 namespace boost { namespace mpl {
0025
0026 template<
0027       typename BOOST_MPL_AUX_NA_PARAM(Sequence)
0028     , typename BOOST_MPL_AUX_NA_PARAM(State)
0029     , typename BOOST_MPL_AUX_NA_PARAM(BackwardOp)
0030     , typename ForwardOp = arg<1>
0031     >
0032 struct reverse_fold
0033 {
0034     typedef typename aux::reverse_fold_impl<
0035           ::boost::mpl::O1_size<Sequence>::value
0036         , typename begin<Sequence>::type
0037         , typename end<Sequence>::type
0038         , State
0039         , BackwardOp
0040         , ForwardOp
0041         >::state type;
0042
0043     BOOST_MPL_AUX_LAMBDA_SUPPORT(3,reverse_fold,(Sequence,State,BackwardOp))
0044 };
0045
0046 BOOST_MPL_AUX_NA_SPEC(3, reverse_fold)
0047
0048 }}
0049
0050 #endif // BOOST_MPL_REVERSE_FOLD_HPP_INCLUDED