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{-# LANGUAGE Safe #-}
-----------------------------------------------------------------------------
-- |
-- Module : Data.STRef.Lazy
-- Copyright : (c) The University of Glasgow 2001
-- License : BSD-style (see the file libraries/base/LICENSE)
--
-- Maintainer : libraries@haskell.org
-- Stability : experimental
-- Portability : non-portable (uses Control.Monad.ST.Lazy)
--
-- Mutable references in the lazy ST monad.
--
-----------------------------------------------------------------------------
module Data.STRef.Lazy (
-- * STRefs
ST.STRef, -- abstract, instance Eq
newSTRef, -- :: a -> ST s (STRef s a)
readSTRef, -- :: STRef s a -> ST s a
writeSTRef, -- :: STRef s a -> a -> ST s ()
modifySTRef -- :: STRef s a -> (a -> a) -> ST s ()
) where
import Control.Monad.ST.Lazy.Safe
import qualified Data.STRef as ST
import Prelude
newSTRef :: a -> ST s (ST.STRef s a)
readSTRef :: ST.STRef s a -> ST s a
writeSTRef :: ST.STRef s a -> a -> ST s ()
modifySTRef :: ST.STRef s a -> (a -> a) -> ST s ()
newSTRef = strictToLazyST . ST.newSTRef
readSTRef = strictToLazyST . ST.readSTRef
writeSTRef r a = strictToLazyST (ST.writeSTRef r a)
modifySTRef r f = strictToLazyST (ST.modifySTRef r f)
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