ReturnBase.hpp

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/***************************************************************************
  tag: The SourceWorks  Tue Sep 7 00:55:18 CEST 2010  ReturnBase.hpp

                        ReturnBase.hpp -  description
                           -------------------
    begin                : Tue September 07 2010
    copyright            : (C) 2010 The SourceWorks
    email                : peter@thesourceworks.com

 ***************************************************************************
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 *   software library without restriction.  Specifically, if other files   *
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#ifndef ORO_RETURN_BASE_HPP
#define ORO_RETURN_BASE_HPP

#include <boost/type_traits.hpp>

namespace RTT
{
    namespace internal
    {
        template<int, class F>
        struct ReturnBaseImpl;

        template<class F>
        struct ReturnBase
            : public ReturnBaseImpl<boost::function_traits<F>::arity, F>
        {};


        template<class F>
        struct ReturnBaseImpl<0,F>
        {
            typedef typename boost::function_traits<F>::result_type result_type;
            virtual ~ReturnBaseImpl() {}

            virtual result_type ret() = 0;
        };

        template<class F>
        struct ReturnBaseImpl<1,F>
        {
            typedef typename boost::function_traits<F>::result_type result_type;
            typedef typename boost::function_traits<F>::arg1_type arg1_type;
            virtual ~ReturnBaseImpl() {}

            virtual result_type ret(arg1_type a1) = 0;
            virtual result_type ret() = 0;
        };

        template<class F>
        struct ReturnBaseImpl<2,F>
        {
            typedef typename boost::function_traits<F>::result_type result_type;
            typedef typename boost::function_traits<F>::arg1_type arg1_type;
            typedef typename boost::function_traits<F>::arg2_type arg2_type;
            virtual ~ReturnBaseImpl() {}

            virtual result_type ret(arg1_type a1, arg2_type a2) = 0;
            virtual result_type ret() = 0;
        };

        template<class F>
        struct ReturnBaseImpl<3,F>
        {
            typedef typename boost::function_traits<F>::result_type result_type;
            typedef typename boost::function_traits<F>::arg1_type arg1_type;
            typedef typename boost::function_traits<F>::arg2_type arg2_type;
            typedef typename boost::function_traits<F>::arg3_type arg3_type;
            virtual ~ReturnBaseImpl() {}

            virtual result_type ret(arg1_type a1, arg2_type a2, arg3_type a3) = 0;
            virtual result_type ret() = 0;
        };

        template<class F>
        struct ReturnBaseImpl<4,F>
        {
            typedef typename boost::function_traits<F>::result_type result_type;
            typedef typename boost::function_traits<F>::arg1_type arg1_type;
            typedef typename boost::function_traits<F>::arg2_type arg2_type;
            typedef typename boost::function_traits<F>::arg3_type arg3_type;
            typedef typename boost::function_traits<F>::arg4_type arg4_type;
            virtual ~ReturnBaseImpl() {}

            virtual result_type ret(arg1_type a1, arg2_type a2, arg3_type a3, arg4_type a4) = 0;
            virtual result_type ret() = 0;
        };

        template<class F>
        struct ReturnBaseImpl<5,F>
        {
            typedef typename boost::function_traits<F>::result_type result_type;
            typedef typename boost::function_traits<F>::arg1_type arg1_type;
            typedef typename boost::function_traits<F>::arg2_type arg2_type;
            typedef typename boost::function_traits<F>::arg3_type arg3_type;
            typedef typename boost::function_traits<F>::arg4_type arg4_type;
            typedef typename boost::function_traits<F>::arg5_type arg5_type;
            virtual ~ReturnBaseImpl() {}

            virtual result_type ret(arg1_type a1, arg2_type a2, arg3_type a3, arg4_type a4, arg5_type a5) = 0;
            virtual result_type ret() = 0;
        };

        template<class F>
        struct ReturnBaseImpl<6,F>
        {
            typedef typename boost::function_traits<F>::result_type result_type;
            typedef typename boost::function_traits<F>::arg1_type arg1_type;
            typedef typename boost::function_traits<F>::arg2_type arg2_type;
            typedef typename boost::function_traits<F>::arg3_type arg3_type;
            typedef typename boost::function_traits<F>::arg4_type arg4_type;
            typedef typename boost::function_traits<F>::arg5_type arg5_type;
            typedef typename boost::function_traits<F>::arg6_type arg6_type;
            virtual ~ReturnBaseImpl() {}

            virtual result_type ret(arg1_type a1, arg2_type a2, arg3_type a3, arg4_type a4, arg5_type a5, arg6_type a6) = 0;
            virtual result_type ret() = 0;
        };

        template<class F>
        struct ReturnBaseImpl<7,F>
        {
            typedef typename boost::function_traits<F>::result_type result_type;
            typedef typename boost::function_traits<F>::arg1_type arg1_type;
            typedef typename boost::function_traits<F>::arg2_type arg2_type;
            typedef typename boost::function_traits<F>::arg3_type arg3_type;
            typedef typename boost::function_traits<F>::arg4_type arg4_type;
            typedef typename boost::function_traits<F>::arg5_type arg5_type;
            typedef typename boost::function_traits<F>::arg6_type arg6_type;
            typedef typename boost::function_traits<F>::arg7_type arg7_type;
            virtual ~ReturnBaseImpl() {}

            virtual result_type ret(arg1_type a1, arg2_type a2, arg3_type a3, arg4_type a4, arg5_type a5, arg6_type a6, arg7_type a7) = 0;
            virtual result_type ret() = 0;
        };
    }
}
#endif