> > Is there a better way than IORefs
> >
> The state Monad.
Do you mean one state shared among all actors, like this?
type MGame = State GameState
newtype GameState = GameState { <shared state> }
That gets part of the way, but I'm thinking of a situation where each
instance of a particular type of actor can have its own reference to
some other actor:
newtype Watcher = Watcher {
otherActor :: IORef ActorWrapper
}
(Here, ActorWrapper is an existential type that hides a specific actor
type.)
I started writing a game using IORefs that way, allowing actors to see
and cause changes in each other, but in the back of my mind I wonder if
this is a symptom of a C++ background.
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