From: Alexander Nasonov (alnsn_at_[hidden])
Date: 2005-02-14 00:57:05
David Abrahams wrote:
> Okay, but what's the value of modeling an is-a relationship between
> states? In a FSM, states are distinct. One state is-not-a nother
> state.
Dog is-a Animal at modelling state. At runtime
Dog dog;
is not-a
Animal animal;
Likewise, Running state is-a Active state at modelling stage.
> AFAICT it seems to be a way of grouping states, or perhaps of
> emulating substates, so you can avoid writing the transitions
> that a group of states has in common (?)
Yep.
-- Alexander