[Boost-users] Boost.Spirit Karma: how to store generator?

Hello, After reading Karma tutorial, I still don't understand whether there a way to store generator except auto my_generator = ... I would like to generate text representation for many similar objects and I think that it is worth to use single generate object and pass it to generate_delimited() by const reference. Are there such things like qi::rule<> and qi::grammar for Karma?