[Haskell-cafe] Re: Is there anyone out there who can translate C# generics into Haskell?

[Jules Bean]

Achim Schneider wrote:
> things like
> 
> 
> data State = State 
>     { winSize   :: IORef Size
>     , t         :: IORef Int
>     , fps       :: IORef Float
>     , showFPS   :: IORef Bool
>     , showHelp  :: IORef Bool
>     , grabMouse :: IORef Bool
>     , mousePos  :: IORef (Maybe Position)
>     , mouseDelta :: IORef Position
>     , viewRot   :: IORef Vec3
>     , angle'    :: IORef GLfloat
>     , ballPos   :: IORef Vec2
>     , ballVel   :: IORef Vec2
>     }


Yuck!

I'm not sure whether this is a real example or not, but if it's real, 
get rid of all those IORefs. Make State a simple type, and use (IORef 
State) as needed for callbacks, and hide that fact in other code.

Jules