-- Hoogle documentation, generated by Haddock
-- See Hoogle, http://www.haskell.org/hoogle/


-- | A class for references in Haskell
--   
--   Reference is class which generalizes references and monads they exists
--   in. It means that IORef, STRef and others can be accessed by common
--   interface.
@package reference
@version 0.1


-- | Reference is class which generalizes references and monads they exists
--   in. It means that IORef, STRef and others can be accessed by common
--   interface.
module Data.Reference

-- | Class connecting mutable variable and monad it exists in.
class Monad m => Reference r m
newRef :: Reference r m => a -> m (r a)
readRef :: Reference r m => r a -> m a
writeRef :: Reference r m => r a -> a -> m ()
modifyRef :: Reference r m => r a -> (a -> m (a, b)) -> m b
instance Reference TVar STM
instance Reference MVar IO
instance Reference (STRef s) (ST s)
instance Reference IORef IO