[Boost-users] [MSM] Is there an elegant way to get the outermost FSM?

30 Aug 2011

      Hi, 

I am having a statemachine with a submachine. In the internal submachine I need to check if there is a flag active in the outer statemachine.
Currently I solve this with a const pointer to the outermost FSM passed to the submachine's constructor:
	backEnd.set_states(msm::back::states_ <<
			StOk(msm::back::states_ <<
					StSlave(&backEnd)));
StSlave is the internal submachine in which I need to check whether a flag in StOk is active or not.

Then I check the flag activity status e.g in a guard of StSlave like this:
	struct GrdBladeUp {
		template<class EVT, class FSM, class SourceState, class TargetState>
		bool operator()(EVT const& event, FSM& fsm, SourceState&, TargetState&) {
			if(fsm.getOutermostFSM()->template is_flag_active<FlagBladeUp>()) {
				return true;
			}
			return false;
		}
	};

Is there an easier way to get somehow the parent fsm or the outermost fsm of a submachine?

Thanks,
Gabor

[Boost-users] [MSM] Is there an elegant way to get the outermost FSM?

Gábor Márton