Subject: Re: [boost] New library in Vault: Msm (Meta State Machine)
From: Aleksey Gurtovoy (agurtovoy_at_[hidden])
Date: 2008-10-17 17:50:47
On Fri, 17 Oct 2008 11:15:48 -0500, Christophe Henry
> I admit the UML standard is not too clear in its description of
> submachines but states the goal clearly (UML Superstructurespecification
> v2.1.2 p549), as: "Submachine state is a decompositionmechanism that
> allows factoring of common behaviors and their reuse".
> And this is a main design point for Msm. Submachines in Msm intend to
> be reusable blocks, like classes and functions. They have entrypoints
> (entry conditions and initial states), can be defined indifferent files
> and reused in different state machines. What definesa FSM with Msm is
> its transition table, not the inside of submachines.
> Submachines can be reused in different main state machines and thelink
> between all is the transition table.
FWIW, the above completely resonates with my experience of decomposing
complex FSMs and is one of the reasons I'm excited about Msm.
-- Aleksey Gurtovoy MetaCommunications Engineering
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