#ifndef BOOST_MPL_SWITCH_HPP_INCLUDED

#define BOOST_MPL_SWITCH_HPP_INCLUDED

// Copyright Aleksey Gurtovoy 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.

// $Id: switch.hpp 49267 2008-10-11 06:19:02Z agurtovoy $

// $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $

// $Revision: 49267 $

#include <boost/mpl/find_if.hpp>

#include <boost/mpl/deref.hpp>

#include <boost/mpl/lambda.hpp>

#include <boost/mpl/apply.hpp>

#include <boost/mpl/pair.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(Body)

    , typename BOOST_MPL_AUX_NA_PARAM(T)

    >

struct switch_

{

    typedef typename find_if<

          Body

        , apply1< lambda< first<_1> >, T >

        >::type iter_;

    typedef typename deref<iter_>::type pair_;

    typedef typename lambda< typename second<pair_>::type >::type f_;

    typedef typename apply1<f_,T>::type type;

    BOOST_MPL_AUX_LAMBDA_SUPPORT(2,switch_,(Body,T))

};

BOOST_MPL_AUX_NA_SPEC(2, switch_)

}}

#endif // BOOST_MPL_SWITCH_HPP_INCLUDED