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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: Ada platforms and pricing, was: Re: a new language,
 designed for safety !
Date: Tue, 24 Jun 2014 17:48:24 +0100
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Date: 2014-06-24T17:48:24+01:00
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"Dan'l Miller" <optikos@verizon.net> writes:

> On Tuesday, June 24, 2014 5:24:03 AM UTC-5, Simon Wright wrote:
>> Shark8 writes:

>> > Type State is ([...]);
>> > Type Event is ([...]);
>> > -- Here it is!
>> > FSM : Array(State, Event) of State:= ([...]);
>> > ...and that's Ada-83.
>>
>> You'd need the Action (access procedure (...)) to be executed on the
>> transition, too.
>
>   Moore FSM: actions only on the entry of states
> http://en.wikipedia.org/wiki/Moore_machine
>   He was representing a Moore machine, which tends to increase the
> quantity of states to discern context in the real-world.
>
>   Mealy FSM: actions upon transition to next state
> http://en.wikipedia.org/wiki/Mealy_machine
>   You are representing a Mealy machine, which is the more-mainstream
> modern FSM, because pairs of states (i.e., the origin & destination of
> each transition) provide a more natural (i.e., more expressive & more
> compact) way to discern context.

My state machine processor[1] allows both, whichever the analyst feels
more natural. I have no evidence as to whether this helps the reader at
all (or hinders tham, come to that).

[1] http://coldframe.sourceforge.net/coldframe/event-modelling.html