content: {-# 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
  import qualified Data.STRef as ST
  
  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)
  