#if !defined(BOOST_PP_IS_ITERATING)

///// header body

#ifndef BOOST_MPL_AUX_TEMPLATE_ARITY_HPP_INCLUDED

#define BOOST_MPL_AUX_TEMPLATE_ARITY_HPP_INCLUDED

// 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: template_arity.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/aux_/config/ttp.hpp>

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

#if !defined(BOOST_MPL_PREPROCESSING_MODE)

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

#   include <boost/mpl/int.hpp>

#   if !defined(BOOST_MPL_CFG_NO_FULL_LAMBDA_SUPPORT)

#   if defined(BOOST_MPL_CFG_EXTENDED_TEMPLATE_PARAMETERS_MATCHING)

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

#   endif

#   else

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

#   endif

#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 template_arity.hpp

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

#else

#   if !defined(BOOST_MPL_CFG_NO_FULL_LAMBDA_SUPPORT)

#   if defined(BOOST_MPL_CFG_EXTENDED_TEMPLATE_PARAMETERS_MATCHING)

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

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

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

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

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

#   include <boost/preprocessor/seq/fold_left.hpp>

#   include <boost/preprocessor/comma_if.hpp>

#   include <boost/preprocessor/iterate.hpp>

#   include <boost/preprocessor/inc.hpp>

#   include <boost/preprocessor/cat.hpp>

#   define AUX778076_ARITY BOOST_PP_INC(BOOST_MPL_LIMIT_METAFUNCTION_ARITY)

namespace boost { namespace mpl { namespace aux {

template< BOOST_MPL_AUX_NTTP_DECL(int, N) > struct arity_tag

{

    typedef char (&type)[N + 1];

};

#   define AUX778076_MAX_ARITY_OP(unused, state, i_) \

    ( BOOST_PP_CAT(C,i_) > 0 ? BOOST_PP_CAT(C,i_) : state ) \

/**/

template<

      BOOST_MPL_PP_PARAMS(AUX778076_ARITY, BOOST_MPL_AUX_NTTP_DECL(int, C))

    >

struct max_arity

{

    BOOST_STATIC_CONSTANT(int, value = 

          BOOST_PP_SEQ_FOLD_LEFT(

              AUX778076_MAX_ARITY_OP

            , -1

            , BOOST_MPL_PP_RANGE(1, AUX778076_ARITY)

            )

        );

};

#   undef AUX778076_MAX_ARITY_OP

arity_tag<0>::type arity_helper(...);

#   define BOOST_PP_ITERATION_LIMITS (1, AUX778076_ARITY)

#   define BOOST_PP_FILENAME_1 <boost/mpl/aux_/template_arity.hpp>

#   include BOOST_PP_ITERATE()

template< typename F, BOOST_MPL_AUX_NTTP_DECL(int, N) >

struct template_arity_impl

{

    BOOST_STATIC_CONSTANT(int, value = 

          sizeof(arity_helper(type_wrapper<F>(),arity_tag<N>())) - 1

        );

};

#   define AUX778076_TEMPLATE_ARITY_IMPL_INVOCATION(unused, i_, F) \

    BOOST_PP_COMMA_IF(i_) template_arity_impl<F,BOOST_PP_INC(i_)>::value \

/**/

template< typename F >

struct template_arity

{

    BOOST_STATIC_CONSTANT(int, value = (

          max_arity< BOOST_MPL_PP_REPEAT(

              AUX778076_ARITY

            , AUX778076_TEMPLATE_ARITY_IMPL_INVOCATION

            , F

            ) >::value

        ));

    typedef mpl::int_<value> type;

};

#   undef AUX778076_TEMPLATE_ARITY_IMPL_INVOCATION

#   undef AUX778076_ARITY

}}}

#   endif // BOOST_MPL_CFG_EXTENDED_TEMPLATE_PARAMETERS_MATCHING

#   else // BOOST_MPL_CFG_NO_FULL_LAMBDA_SUPPORT

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

namespace boost { namespace mpl { namespace aux {

template< bool >

struct template_arity_impl

{

    template< typename F > struct result_

        : mpl::int_<-1>

    {

    };

};

template<>

struct template_arity_impl<true>

{

    template< typename F > struct result_

        : F::arity

    {

    };

};

template< typename F >

struct template_arity

    : template_arity_impl< ::boost::mpl::aux::has_rebind<F>::value >

        ::template result_<F>

{

};

#if defined(BOOST_MPL_CFG_MSVC_ETI_BUG)

template<>

struct template_arity<int>

    : mpl::int_<-1>

{

};

#endif

}}}

#   endif // BOOST_MPL_CFG_NO_FULL_LAMBDA_SUPPORT

#endif // BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS

#endif // BOOST_MPL_AUX_TEMPLATE_ARITY_HPP_INCLUDED

///// iteration

#else

#define i_ BOOST_PP_FRAME_ITERATION(1)

template<

      template< BOOST_MPL_PP_PARAMS(i_, typename P) > class F

    , BOOST_MPL_PP_PARAMS(i_, typename T)

    >

typename arity_tag<i_>::type

arity_helper(type_wrapper< F<BOOST_MPL_PP_PARAMS(i_, T)> >, arity_tag<i_>);

#undef i_

#endif // BOOST_PP_IS_ITERATING