[Boost-users] spirit's functor_parser<functor>

Hi, I'm using a lot of functor parsers and combine them in one grammar. Now, my grammar explodes at the time. Therefore I want to split/compile the functor parsers into separate files. This requires a forward declaration. Well, how to perform this?? spirit::functor_parser<functor> functor_p; is an instance. Thanks, Olaf