[boost] [function] how to create function objects from bind expr automatically

Hi! What I want to achieve: automatically build a boost::function from a bind expression without having to specifiy the signature.

From what I understand in the boost::bind code it is not possible to extract the signature, arity or return type information from an object returned by boost::bind.

So I have no idea, how to write code that allows the registration of arbitrary function pointers as boost::function objects depending on the argument list. Any hint to possible solutions appreciated. I need more than 3 arguments, so boost::lambda::bind does not help here. Markus