HGamer3D.Util.Variable

:-) I'm fundamentally convinced this is missing in Haskell, urs of the backwoods

Documentation

data Var a

makeVar :: a -> IO (Var a)

readVar :: Var a -> IO a

writeVar :: Var a -> a -> IO a

writeVar' :: Var a -> a -> IO a

updateVar :: Var a -> (a -> (a, b)) -> IO b

updateVar' :: Var a -> (a -> (a, b)) -> IO b