#if !defined(BOOST_PP_IS_ITERATING)

///// header body

#ifndef BOOST_MPL_ARG_HPP_INCLUDED

#define BOOST_MPL_ARG_HPP_INCLUDED

// Copyright Peter Dimov 2001-2002

// Copyright Aleksey Gurtovoy 2001-2004

//

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

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

// $Revision: 49267 $

#if !defined(BOOST_MPL_PREPROCESSING_MODE)

#   include <boost/mpl/arg_fwd.hpp>

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

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

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

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

#endif

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

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

#if !defined(BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS) \

    && !defined(BOOST_MPL_PREPROCESSING_MODE)

#   define BOOST_MPL_PREPROCESSED_HEADER arg.hpp

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

#else

#   include <boost/mpl/limits/arity.hpp>

#   include <boost/mpl/aux_/preprocessor/default_params.hpp>

#   include <boost/mpl/aux_/preprocessor/params.hpp>

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

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

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

#   include <boost/preprocessor/iterate.hpp>

#   include <boost/preprocessor/inc.hpp>

#   include <boost/preprocessor/cat.hpp>

BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_OPEN

// local macro, #undef-ined at the end of the header

#if !defined(BOOST_MPL_CFG_NO_DEFAULT_PARAMETERS_IN_NESTED_TEMPLATES)

#   define AUX778076_ARG_N_DEFAULT_PARAMS(param,value) \

    BOOST_MPL_PP_DEFAULT_PARAMS( \

          BOOST_MPL_LIMIT_METAFUNCTION_ARITY \

        , param \

        , value \

        ) \

    /**/

#else

#   define AUX778076_ARG_N_DEFAULT_PARAMS(param,value) \

    BOOST_MPL_PP_PARAMS( \

          BOOST_MPL_LIMIT_METAFUNCTION_ARITY \

        , param \

        ) \

    /**/

#endif

#define BOOST_PP_ITERATION_PARAMS_1 \

    (3,(0, BOOST_MPL_LIMIT_METAFUNCTION_ARITY, <boost/mpl/arg.hpp>))

#include BOOST_PP_ITERATE()

#   undef AUX778076_ARG_N_DEFAULT_PARAMS

BOOST_MPL_AUX_NONTYPE_ARITY_SPEC(1,int,arg)

BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_CLOSE

#endif // BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS

#endif // BOOST_MPL_ARG_HPP_INCLUDED

///// iteration

#else

#define i_ BOOST_PP_FRAME_ITERATION(1)

#if i_ > 0

template<> struct arg<i_>

{

    BOOST_STATIC_CONSTANT(int, value = i_);

    typedef arg<BOOST_PP_INC(i_)> next;

    BOOST_MPL_AUX_ARG_TYPEDEF(na, tag)

    BOOST_MPL_AUX_ARG_TYPEDEF(na, type)

    template<

          AUX778076_ARG_N_DEFAULT_PARAMS(typename U, na)

        >

    struct apply

    {

        typedef BOOST_PP_CAT(U,i_) type;

        BOOST_MPL_AUX_ASSERT_NOT_NA(type);

    };

};

#else

template<> struct arg<-1>

{

    BOOST_STATIC_CONSTANT(int, value = -1);

    BOOST_MPL_AUX_ARG_TYPEDEF(na, tag)

    BOOST_MPL_AUX_ARG_TYPEDEF(na, type)

    template<

          AUX778076_ARG_N_DEFAULT_PARAMS(typename U, na)

        >

    struct apply

    {

        typedef U1 type;

        BOOST_MPL_AUX_ASSERT_NOT_NA(type);

    };

};

#endif // i_ > 0

#undef i_

#endif // BOOST_PP_IS_ITERATING