#ifndef BOOST_MPL_EVAL_IF_HPP_INCLUDED

#define BOOST_MPL_EVAL_IF_HPP_INCLUDED

// Copyright Aleksey Gurtovoy 2000-2004

//

// 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: /cvsroot/boost/boost/boost/mpl/eval_if.hpp,v $

// $Date: 2004/11/28 01:54:10 $

// $Revision: 1.3 $

#include <boost/mpl/if.hpp>

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

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

#include <boost/mpl/aux_/config/msvc.hpp>

#include <boost/mpl/aux_/config/gcc.hpp>

#include <boost/mpl/aux_/config/workaround.hpp>

namespace boost { namespace mpl {

template<

      typename BOOST_MPL_AUX_NA_PARAM(C)

    , typename BOOST_MPL_AUX_NA_PARAM(F1)

    , typename BOOST_MPL_AUX_NA_PARAM(F2)

    >

struct eval_if

#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) \

     || ( BOOST_WORKAROUND(BOOST_MPL_CFG_GCC, >= 0x0300) \

        && BOOST_WORKAROUND(BOOST_MPL_CFG_GCC, BOOST_TESTED_AT(0x0304)) \

        )

{

    typedef typename if_<C,F1,F2>::type f_;

    typedef typename f_::type type;

#else

    : if_<C,F1,F2>::type

{

#endif

    BOOST_MPL_AUX_LAMBDA_SUPPORT(3,eval_if,(C,F1,F2))

};

// (almost) copy & paste in order to save one more 

// recursively nested template instantiation to user

template<

      bool C

    , typename F1

    , typename F2

    >

struct eval_if_c

#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) \

     || ( BOOST_WORKAROUND(BOOST_MPL_CFG_GCC, >= 0x0300) \

        && BOOST_WORKAROUND(BOOST_MPL_CFG_GCC, BOOST_TESTED_AT(0x0304)) \

        )

{

    typedef typename if_c<C,F1,F2>::type f_;

    typedef typename f_::type type;

#else

    : if_c<C,F1,F2>::type

{

#endif

};

BOOST_MPL_AUX_NA_SPEC(3, eval_if)

}}

#endif // BOOST_MPL_EVAL_IF_HPP_INCLUDED