unfused_lvalue_args.hpp

来自「Boost provides free peer-reviewed portab」· HPP 代码 · 共 137 行

/*=============================================================================
    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/utility/result_of.hpp>

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

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

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

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

    template <class Function> class unfused_lvalue_args
    {
        Function fnc_transformed;

        typedef typename detail::qf_c<Function>::type function_c;
        typedef typename detail::qf<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)
        { }

        template <typename Sig>
        struct result;

        typedef typename boost::result_of<
            function_c(fusion::vector0 &) >::type call_const_0_result;

        inline call_const_0_result operator()() const
        {
            fusion::vector0 arg;
            return this->fnc_transformed(arg);
        }

        typedef typename boost::result_of< 
            function(fusion::vector0 &) >::type call_0_result;

        inline call_0_result operator()() 
        {
            fusion::vector0 arg;
            return this->fnc_transformed(arg);
        }

        #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()
    };
}}

namespace boost 
{
    template<class F>
    struct result_of< boost::fusion::unfused_lvalue_args<F> const () >
    {
        typedef typename boost::fusion::unfused_lvalue_args<F>::call_const_0_result type;
    };
    template<class F>
    struct result_of< boost::fusion::unfused_lvalue_args<F>() >
    {
        typedef typename boost::fusion::unfused_lvalue_args<F>::call_0_result type;
    };
}

#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 <class Self, BOOST_PP_ENUM_PARAMS(N,typename T)>
        struct result< Self const (BOOST_PP_ENUM_PARAMS(N,T)) >
            : boost::result_of< function_c(
                BOOST_PP_CAT(fusion::vector,N)< BOOST_PP_ENUM_BINARY_PARAMS(N,
                    typename detail::mref<T,>::type BOOST_PP_INTERCEPT) > & )>
        { };

        template <class Self, BOOST_PP_ENUM_PARAMS(N,typename T)>
        struct result< Self(BOOST_PP_ENUM_PARAMS(N,T)) >
            : boost::result_of< function(
                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 boost::result_of<function_c(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 boost::result_of<function(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