...

You can make a circular buffer of, say, boost::function<void()>, this allows you to anonymize functors, for example this can be assigned into this boost::function: template<class Fsm, class Event> struct process_some_event { process_some_event(Fsm* fsm): fsm_(fsm){} void operator()() { fsm_->process_event(Event()); } Fsm* fsm_; };

Or as a variant, you can make a boost::function<void(my_fsm&)> with the corresponding operator(). Whatever fits better in your case.

Yes, that could be a good solution. I haven't had time to try that way yet but I will as soon as I can.

This discussion and similar stuff should go into the docs or some examples file. Perhaps it would help more people? It has certainly been of great help to me.

Actually I plan to do even better and offer a more general library solution for this. It's one of the big items on my list, and a pretty high one. Cheers, Christophe