Re: [Boost-users] [statechart] history not saved

Subject: Re: [Boost-users] [statechart] history not saved
From: Andreas Huber (ahd6974-spamboostorgtrap_at_[hidden])
Date: 2012-11-08 17:10:20

Ilya Orlov <iorlov <at> gmail.com> writes:

> I missed your advice in previous message. I changed transition code to A1 
state and it worked perfectly. But ideally, I'd like to transit from B not to 
A1 but to A state. How I can change this code to get it working with saving all 
history for A-substates?

I guess you are missing the fact that the template argument passed to 
deep_history is actually the *default* *state*. This is the state that is 
entered when no history has ever been saved. If history has been saved (as is 
the case in your example code) then transit< sc::deep_history < StateA1 > >() 
will transit to whatever inner state of A was active before A was exited. This 
is explained in more detail here:

<http://www.boost.org/doc/libs/1_52_0/libs/statechart/doc/tutorial.html#History>

HTH,

Andreas Huber

P.S. In your example you're also specifying sc::deep_history< StateA1 > as 
InnerInitial of A. So you could even transit directly to A, as follows:

return transit < StateA >(); 

and get exactly the same behavior as when you write:

return transit< sc::deep_history < StateA1 > >();