class virtual[['i, 'o]]
next :object
..end
Use inherit ['i, 'o] next
to derive a class that implements an
intermediate state in a machine.
method private virtual guard : (('i, 'o) #next, 'i, 'o, unit) Cf_state_gadget.guard
The guard evaluated by this state of the machine.
method next : 'a. (('i, 'o) #next as 'b, 'i, 'o, 'a) Cf_state_gadget.t
Use obj#next
to transition the state of the machine by storing
obj
in the state of the gadget and applying
Cf_state_gadget.guard
self#guard
.