Control/Monad/ST/Lazy/Safe.hs

{-# LANGUAGE Trustworthy #-}

-----------------------------------------------------------------------------
-- |
-- Module : Control.Monad.ST.Lazy.Safe
-- Copyright : (c) The University of Glasgow 2001
-- License : BSD-style (see the file libraries/base/LICENSE)
--
-- Maintainer : libraries@haskell.org
-- Stability : provisional
-- Portability : non-portable (requires universal quantification for runST)
--
-- This module presents an identical interface to "Control.Monad.ST",
-- except that the monad delays evaluation of state operations until
-- a value depending on them is required.
--
-- Safe API only.
--
-----------------------------------------------------------------------------

module Control.Monad.ST.Lazy.Safe (
 -- * The 'ST' monad
 ST,
 runST,
 fixST,

 -- * Converting between strict and lazy 'ST'
 strictToLazyST, lazyToStrictST,

 -- * Converting 'ST' To 'IO'
 RealWorld,
 stToIO,
 ) where

import Control.Monad.ST.Lazy.Imp