// Copyright David Abrahams, Daniel Wallin 2003. Use, modification and 

// distribution is subject to 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)

#ifndef BOOST_PARAMETER_MACROS_050412_HPP

#define BOOST_PARAMETER_MACROS_050412_HPP

#include <boost/preprocessor/tuple/elem.hpp>

#include <boost/preprocessor/repetition/repeat_from_to.hpp>

#include <boost/preprocessor/arithmetic/inc.hpp>

#include <boost/preprocessor/logical/bool.hpp>

#include <boost/preprocessor/punctuation/comma_if.hpp>

#include <boost/preprocessor/control/expr_if.hpp>

#include <boost/preprocessor/repetition/enum_params.hpp>

#include <boost/preprocessor/repetition/enum_binary_params.hpp>

#include <boost/preprocessor/cat.hpp>

#define BOOST_PARAMETER_FUN_TEMPLATE_HEAD1(n) \

    template<BOOST_PP_ENUM_PARAMS(n, class T)>

#define BOOST_PARAMETER_FUN_TEMPLATE_HEAD0(n)

#ifndef BOOST_NO_SFINAE

# define BOOST_PARAMETER_MATCH_TYPE(n, param)           \

            BOOST_PP_EXPR_IF(n, typename) param::match  \

            <                                           \

                BOOST_PP_ENUM_PARAMS(n, T)              \

            >::type 

#else

# define BOOST_PARAMETER_MATCH_TYPE(n, param) param

#endif

#define BOOST_PARAMETER_FUN_DECL(z, n, params)                                      \

                                                                                    \

    BOOST_PP_CAT(BOOST_PARAMETER_FUN_TEMPLATE_HEAD, BOOST_PP_BOOL(n))(n)            \

                                                                                    \

    BOOST_PP_TUPLE_ELEM(3, 0, params)                                               \

        BOOST_PP_TUPLE_ELEM(3, 1, params)(                                          \

            BOOST_PP_ENUM_BINARY_PARAMS(n, T, const& p)                             \

            BOOST_PP_COMMA_IF(n)                                                    \

            BOOST_PARAMETER_MATCH_TYPE(n,BOOST_PP_TUPLE_ELEM(3, 2, params))         \

            kw = BOOST_PP_TUPLE_ELEM(3, 2, params)()                                \

        )                                                                           \

    {                                                                               \

        return BOOST_PP_CAT(BOOST_PP_TUPLE_ELEM(3, 1, params), _with_named_params)( \

            kw(BOOST_PP_ENUM_PARAMS(n, p))                                          \

        );                                                                          \

    }

// Generates:

//

// template<class Params>

// ret name ## _with_named_params(Params const&);

//

// template<class T0>

// ret name(T0 const& p0, typename parameters::match<T0>::type kw = parameters())

// {

//     return name ## _with_named_params(kw(p0));

// }

//

// template<class T0, ..., class TN>

// ret name(T0 const& p0, ..., TN const& PN

//    , typename parameters::match<T0, ..., TN>::type kw = parameters())

// {

//     return name ## _with_named_params(kw(p0, ..., pN));

// }

//

// template<class Params>

// ret name ## _with_named_params(Params const&)

//

// lo and hi determines the min and max arity of the generated functions.

#define BOOST_PARAMETER_FUN(ret, name, lo, hi, parameters)                          \

                                                                                    \

    template<class Params>                                                          \

    ret BOOST_PP_CAT(name, _with_named_params)(Params const& p);                    \

                                                                                    \

    BOOST_PP_REPEAT_FROM_TO(                                                        \

        lo, BOOST_PP_INC(hi), BOOST_PARAMETER_FUN_DECL, (ret, name, parameters))    \

                                                                                    \

    template<class Params>                                                          \

    ret BOOST_PP_CAT(name, _with_named_params)(Params const& p)

#define BOOST_PARAMETER_MEMFUN(ret, name, lo, hi, parameters)                       \

                                                                                    \

    BOOST_PP_REPEAT_FROM_TO(                                                        \

        lo, BOOST_PP_INC(hi), BOOST_PARAMETER_FUN_DECL, (ret, name, parameters))    \

                                                                                    \

    template<class Params>                                                          \

    ret BOOST_PP_CAT(name, _with_named_params)(Params const& p)

#endif // BOOST_PARAMETER_MACROS_050412_HPP