

#ifndef BOOST_MPL_TRANSFORM_HPP_INCLUDED

#define BOOST_MPL_TRANSFORM_HPP_INCLUDED



// Copyright Aleksey Gurtovoy 2000-2004

// Copyright David Abrahams 2003-2004

//

// 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.



// $Source$

// $Date: 2004-12-20 12:18:17 -0500 (Mon, 20 Dec 2004) $

// $Revision: 26557 $



#include <boost/mpl/fold.hpp>

#include <boost/mpl/reverse_fold.hpp>

#include <boost/mpl/pair_view.hpp>

#include <boost/mpl/is_sequence.hpp>

#include <boost/mpl/eval_if.hpp>

#include <boost/mpl/lambda.hpp>

#include <boost/mpl/bind.hpp>

#include <boost/mpl/or.hpp>

#include <boost/mpl/not.hpp>

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

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



namespace boost { namespace mpl {



namespace aux { 



template< 

      typename Seq

    , typename Op

    , typename In

    >

struct transform1_impl

    : fold< 

          Seq

        , typename In::state

        , bind2< typename lambda< typename In::operation >::type

            , _1

            , bind1< typename lambda<Op>::type, _2>

            > 

        >

{

};



template< 

      typename Seq

    , typename Op

    , typename In

    >

struct reverse_transform1_impl

    : reverse_fold< 

          Seq

        , typename In::state

        , bind2< typename lambda< typename In::operation >::type

            , _1

            , bind1< typename lambda<Op>::type, _2>

            > 

        >

{

};



template< 

      typename Seq1

    , typename Seq2

    , typename Op

    , typename In

    >

struct transform2_impl

    : fold< 

          pair_view<Seq1,Seq2>

        , typename In::state

        , bind2< typename lambda< typename In::operation >::type

            , _1

            , bind2<

                  typename lambda<Op>::type

                , bind1<first<>,_2>

                , bind1<second<>,_2>

                >

            > 

        >

{

};



template< 

      typename Seq1

    , typename Seq2

    , typename Op

    , typename In

    >

struct reverse_transform2_impl

    : reverse_fold< 

          pair_view<Seq1,Seq2>

        , typename In::state

        , bind2< typename lambda< typename In::operation >::type

            , _1

            , bind2< typename lambda< Op >::type

                , bind1<first<>,_2>

                , bind1<second<>,_2>

                >

            > 

        >

{

};



} // namespace aux 



BOOST_MPL_AUX_INSERTER_ALGORITHM_DEF(3, transform1)                    

BOOST_MPL_AUX_INSERTER_ALGORITHM_DEF(4, transform2)

    

#define AUX778076_TRANSFORM_DEF(name)                                   \

template<                                                               \

      typename BOOST_MPL_AUX_NA_PARAM(Seq1)                             \

    , typename BOOST_MPL_AUX_NA_PARAM(Seq2OrOperation)                  \

    , typename BOOST_MPL_AUX_NA_PARAM(OperationOrInserter)              \

    , typename BOOST_MPL_AUX_NA_PARAM(Inserter)                         \

    >                                                                   \

struct name                                                             \

{                                                                       \

    typedef typename eval_if<                                           \

          or_<                                                          \

              is_na<OperationOrInserter>                                \

            , is_lambda_expression< Seq2OrOperation >                   \

            , not_< is_sequence<Seq2OrOperation> >                      \

            >                                                           \

        , name##1<Seq1,Seq2OrOperation,OperationOrInserter>             \

        , name##2<Seq1,Seq2OrOperation,OperationOrInserter,Inserter>    \

        >::type type;                                                   \

};                                                                      \

BOOST_MPL_AUX_NA_SPEC(4, name)                                          \

/**/



AUX778076_TRANSFORM_DEF(transform)

AUX778076_TRANSFORM_DEF(reverse_transform)



#undef AUX778076_TRANSFORM_DEF



}}



#endif // BOOST_MPL_TRANSFORM_HPP_INCLUDED

