#ifndef BOOST_MPL_FOLD_HPP_INCLUDED

 #define BOOST_MPL_FOLD_HPP_INCLUDED

 // Copyright Aleksey Gurtovoy 2001-2004

 // Copyright David Abrahams 2001-2002

 //

 // 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/fold.hpp,v $

 // $Date: 2004/09/02 15:40:41 $

 // $Revision: 1.4 $

 #include <boost/mpl/begin_end.hpp>

 #include <boost/mpl/O1_size.hpp>

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

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

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

 namespace boost { namespace mpl {

 template<

       typename BOOST_MPL_AUX_NA_PARAM(Sequence)

     , typename BOOST_MPL_AUX_NA_PARAM(State)

     , typename BOOST_MPL_AUX_NA_PARAM(ForwardOp)

     >

 struct fold

 {

     typedef typename aux::fold_impl<

           ::boost::mpl::O1_size<Sequence>::value

         , typename begin<Sequence>::type

         , typename end<Sequence>::type

         , State

         , ForwardOp

         >::state type;

     BOOST_MPL_AUX_LAMBDA_SUPPORT(3,fold,(Sequence,State,ForwardOp))

 };

 BOOST_MPL_AUX_NA_SPEC(3, fold)

 }}

 #endif // BOOST_MPL_FOLD_HPP_INCLUDED