How about POE:NFA?

POE::NFA combines a runtime context with an event driven nondeterministic finite state machine. Its main difference from POE::Session is that it can embody many different states, and each state has a separate group of event handlers. Events are delivered to the appropriate handlers in the current state only, and moving to a new state is an inexpensive way to change what happens when an event arrives.

In reply to Re: Are state machines just for parsing? by fglock
in thread Are state machines just for parsing? by samtregar

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