Re: [boost] Meta State Machine (MSM) review

Subject: Re: [boost] Meta State Machine (MSM) review
From: Stewart, Robert (Robert.Stewart_at_[hidden])
Date: 2009-12-07 09:52:29

Barend Gehrels wrote:
>
> (Of course) I forgot some state transitions and had to include
> the no_transition function, to avoid assertions.  This is all
> working well.  I wondered if non-possible transitions could be
> catched compile-time, but apparently this is not possible
> (because of triggers and guards).

I wonder if the library can provide a debugging mode that would provide a helpful default implementation of no_transition that could help identify the unknown transition rather than requiring the user to write something?  Such a function might access internal details, perhaps only provided in the said debugging mode, that would be clearer about the source state and event for which no transition was provided than would user-level code.

_____
Rob Stewart                           robert.stewart_at_[hidden]
Software Engineer, Core Software      using std::disclaimer;
Susquehanna International Group, LLP  http://www.sig.com

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