Re: [boost] New library in Vault: Msm (Meta State Machine)

Subject: Re: [boost] New library in Vault: Msm (Meta State Machine)
From: christophe henry (henry_christophe_at_[hidden])
Date: 2008-10-16 11:35:45

Hi Andreas,
 
> What do t & D stand for (they do not appear in Figure 2)? They don't seem to be necessary to implement the chart?You should also read the mini doc I included. I added them to make the problem a bit more interesting and show how to solve it with flags.
 
> 1) Is it possible to implement the transitions exactly as shown in the chart?
It is not, again as explained in the mini doc. I see this as an UML goto and decided to implement superior tools instead.
> 2) If no, is this why you introduced two self-transitions to C, one with a guard to prevent transition from B?I didn't. They were there before, I just made them cleaner by using state flagging and a guard condition instead of crossing state boundaries. The UML diagram of the doc looks, in my opinion, cleaner now, less like spaghetti.
Of course I could implement these entry and exit goto-like pseudo states if users want them. I just strongly doubt they are needed.
 
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