{-# 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 newSTRef, readSTRef, writeSTRef, modifySTRef ) 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)