ExFSM

Simple elixir library to define composable FSM as function (not related at all with :gen_fsm, no state/process management).

define FSM with handler modules defining each transition as a simple function but using a macro deftrans which creates a function fsm returning the fsm transition map for this handler module.
deftrans has the same semantic as erlang in memory FSM gen_fsm
combine together multiple fsm handlers to create a “meta” FSM.
send event with the function event which simply find the right handler, execute the handler function.

Usage