/*=============================================================================
    Copyright (c) 2006-2007 Tobias Schwinger
  
    Use modification and distribution are 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).
==============================================================================*/

#if !defined(BOOST_FUSION_FUNCTIONAL_ADAPTER_UNFUSED_LVALUE_ARGS_HPP_INCLUDED)
#if !defined(BOOST_PP_IS_ITERATING)

#include <boost/preprocessor/cat.hpp>
#include <boost/preprocessor/iteration/iterate.hpp>
#include <boost/preprocessor/repetition/enum_params.hpp>
#include <boost/preprocessor/repetition/enum_binary_params.hpp>
#include <boost/preprocessor/facilities/intercept.hpp>

#include <boost/type_traits/remove_reference.hpp>

#include <boost/fusion/sequence/container/vector/vector.hpp>

#include <boost/fusion/functional/adapter/limits.hpp>
#include <boost/fusion/functional/adapter/detail/access.hpp>
#include <boost/fusion/functional/adapter/detail/nullary_call_base.hpp>

namespace boost { namespace fusion
{
    template <class Function> class unfused_lvalue_args;

    //----- ---- --- -- - -  -   -

    struct void_;

    template <class Function> class unfused_lvalue_args
        : public detail::nullary_call_base
              <unfused_lvalue_args<Function>, Function>
    {
        Function fnc_transformed;

        template <class D, class F, bool E>
        friend struct detail::nullary_call_base;

        typedef detail::nullary_call_base<
            fusion::unfused_lvalue_args<Function>, Function > base;

        typedef typename boost::remove_reference<Function>::type function;
        typedef typename detail::call_param<Function>::type func_const_fwd_t;

      public:

        inline explicit unfused_lvalue_args(func_const_fwd_t f = function())
            : fnc_transformed(f)
        { }

        using base::operator();

        template <
            BOOST_PP_ENUM_BINARY_PARAMS(
                BOOST_FUSION_UNFUSED_LVALUE_ARGS_MAX_ARITY,
                typename T, = fusion::void_ BOOST_PP_INTERCEPT ), 
            class _ = fusion::void_ >
        struct result;

        template <typename _>
        struct result<BOOST_PP_ENUM_PARAMS(
                BOOST_FUSION_UNFUSED_LVALUE_ARGS_MAX_ARITY,
                fusion::void_ BOOST_PP_INTERCEPT ), _ >
            : base::r0
        { };

        #define  BOOST_PP_FILENAME_1 \
            <boost/fusion/functional/adapter/unfused_lvalue_args.hpp>
        #define  BOOST_PP_ITERATION_LIMITS \
            (1,BOOST_FUSION_UNFUSED_LVALUE_ARGS_MAX_ARITY)
        #include BOOST_PP_ITERATE()
    };
}}

#define  BOOST_FUSION_CLASS_TPL_PARAMS class F
#define  BOOST_FUSION_CLASS_TPL_SPEC fusion::unfused_lvalue_args<F>
#define  BOOST_FUSION_FUNC_OBJ_ARITY BOOST_FUSION_UNFUSED_LVALUE_ARGS_MAX_ARITY
#include <boost/fusion/functional/adapter/detail/gen_result_of_spec.hpp>

#define BOOST_FUSION_FUNCTIONAL_ADAPTER_UNFUSED_LVALUE_ARGS_HPP_INCLUDED
#else // defined(BOOST_PP_IS_ITERATING)
////////////////////////////////////////////////////////////////////////////////
//
//  Preprocessor vertical repetition code
//
////////////////////////////////////////////////////////////////////////////////
#define N BOOST_PP_ITERATION()

        template <BOOST_PP_ENUM_PARAMS(N,typename T), class _>
        struct result
#if N < BOOST_FUSION_UNFUSED_LVALUE_ARGS_MAX_ARITY
            < BOOST_PP_ENUM_PARAMS(N,T),
            BOOST_PP_ENUM_PARAMS(
                BOOST_PP_SUB(BOOST_FUSION_UNFUSED_LVALUE_ARGS_MAX_ARITY,N),
                fusion::void_ BOOST_PP_INTERCEPT), _ >
#endif
            : function::template result< BOOST_PP_CAT(fusion::vector,N)<
                BOOST_PP_ENUM_BINARY_PARAMS(N,typename detail::mref<T,>::type
                    BOOST_PP_INTERCEPT) > >
        { };

        template <BOOST_PP_ENUM_PARAMS(N,typename T)>
        inline typename function::template result<BOOST_PP_CAT(fusion::vector,N)
            <BOOST_PP_ENUM_BINARY_PARAMS(N,T,& BOOST_PP_INTERCEPT)> >::type
        operator()(BOOST_PP_ENUM_BINARY_PARAMS(N,T,& a)) const
        {
            BOOST_PP_CAT(fusion::vector,N)<
                  BOOST_PP_ENUM_BINARY_PARAMS(N,T,& BOOST_PP_INTERCEPT) >
                arg(BOOST_PP_ENUM_PARAMS(N,a));
            return this->fnc_transformed(arg);
        }

        template <BOOST_PP_ENUM_PARAMS(N,typename T)>
        inline typename function::template result<BOOST_PP_CAT(fusion::vector,N)
            <BOOST_PP_ENUM_BINARY_PARAMS(N,T,& BOOST_PP_INTERCEPT)> >::type
        operator()(BOOST_PP_ENUM_BINARY_PARAMS(N,T,& a)) 
        {
            BOOST_PP_CAT(fusion::vector,N)<
                  BOOST_PP_ENUM_BINARY_PARAMS(N,T,& BOOST_PP_INTERCEPT) >
                arg(BOOST_PP_ENUM_PARAMS(N,a));
            return this->fnc_transformed(arg);
        }
#undef N
#endif // defined(BOOST_PP_IS_ITERATING)
#endif