Re: [boost] [msm] eUML guard/action location

Are all those parentheses used for optional arguments, or could we consider eliminating them?

I'd love to eliminate them but don't see how. They actually are constructors. The complete expression would be something like: typedef BOOST_TYPEOF(build_stt(( DestState() = CurrentState() + cool_event()[guard()]/action(), DestState2() = CurrentState() + cool_event()[guard2()]/action2() ) ) ) transition_table; So I'm really just pretending to pass on-the-fly instances of arguments from types DestState, CurrentState, etc. to evaluate the result with typeof after proto is done.