[Boost-users] [statechart] Pass event data to state constructor?

I'd like to be able to communicate the data from an event to the state(s) that get constructed as a result of a transition. I don't see an obvious way to do that, since the constructors of a state object either take only a context parameter (this is in an asychronous_state_machine), or also take a transition action plus an event. I can save the event data within the context object and then retrieve it post-construction, but that seems error-prone. Is there a better way to do this? Thanks, Bill