Subject: Re: [boost] [msm] Nested submachines and explicit state entry
From: Richard Szabo (sz.richard_at_[hidden])
Date: 2010-06-08 13:12:48
Now I try to attach files with out zipping.
On 8 June 2010 19:05, Richard Szabo <sz.richard_at_[hidden]> wrote:
> Hi Christophe
> I have made an example which implements the UML state chart provided by Michael.
> well it does not compiles with VC9 :(.
> it compiles as fare as the explicit entry target state is a simple
> state but does not if it is a composite sate (e.g.: a sub state
> The example compiles and runs if you uncomment:
> please find in attachment the examle cpp and the compiler output.
> On 8 June 2010 12:58, Christophe Henry
> <christophe.j.henry_at_[hidden]> wrote:
>> Hi Michael,
>>>As already stated in the documentation it is possible to have explicit
>>>state entry into another submachine within a state machine.
>>>Is there a possibility to have a state machine, which has another
>>>submachine with explicit state entry and that submachine has another
>>>submachine with an initial transition.
>>>I put that together in a picture and attached it. I hope then it gets
>>>clearer what I want to do.
>>>The picture shows just a simplified version of the overall state machine
>>>and I discarded some other states, transitions and orthogonal regions.
>> Starts becoming an interesting case ;-)
>> Yes it should work. I tested with the same depth-level without any
>> problem. What is not supported yet would be if your explicit entry was
>> going into a substate of a submachine of a submachine, meaning you can
>> only "cross" one submachine boundary. So your example is ok.
>>>How do I have to declare the transition table and states in that case?
>> A transition table is always declared inside a state machine, after
>> the states have been declared. In my examples I always declare states
>> inside the front-end but it is only for readability. In your case, you
>> could declare the SM1 front-end, then inside its declaration add the
>> one for RunningStateMachine, then inside RunningStateMachine the one
>> for Inner1 and Inner2. After Inner1 and Inner2, the table for
>> RunningStateMachine, then the table for SM1. something like:
>> struct SM1_...
>> struct RunningStateMachine_...
>> struct Inner1_...;
>> typedef msm::back::state_machine<Inner1_> Inner1;
>> // add RunningStateMachine table
>> typedef msm::back::state_machine<RunningStateMachine_> RunningStateMachine;
>> // add SM1 table
>> typedef msm::back::state_machine<SM1_> SM1;
>>>Are there any restrictions regarding nested depth?
>> Not in the library. I see just 2:
>> - your patience while compiling
>> - your compiler. At some point, it will probably get pissed off ;-)
>> Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
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