#ifdef __XMLIO_CAverage__
   DECLARE_FUNCTOR(Average  , average)
#endif //__XMLIO_CAverage__

#ifdef __XMLIO_CAccumulate__
   DECLARE_FUNCTOR(Accumulate  , accumulate)
#endif //__XMLIO_CAccumulate__

#ifdef __XMLIO_CInstant__
   DECLARE_FUNCTOR(Instant, instant)
#endif //__XMLIO_CInstant__

#ifdef __XMLIO_COnce__
   DECLARE_FUNCTOR(Once, once)
#endif //__XMLIO_COnce__

#ifdef __XMLIO_CMaximum__
   DECLARE_FUNCTOR(Maximum , maximum)
#endif //__XMLIO_CMaximum__

#ifdef __XMLIO_CMinimum__
   DECLARE_FUNCTOR(Minimum , minimum)
#endif //__XMLIO_CMinimum__


#undef DECLARE_FUNCTOR