blob: e6c8e8cfdcfdf3c6c5d4ccc0843ddc827de18c4e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
{-# LANGUAGE Trustworthy #-}
-----------------------------------------------------------------------------
-- |
-- Module : Control.Monad.ST.Safe
-- 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 (requires universal quantification for runST)
--
-- This library provides support for /strict/ state threads, as
-- described in the PLDI \'94 paper by John Launchbury and Simon Peyton
-- Jones /Lazy Functional State Threads/.
--
-- Safe API Only.
--
-----------------------------------------------------------------------------
module Control.Monad.ST.Safe (
-- * The 'ST' Monad
ST, -- abstract, instance of Functor, Monad, Typeable.
runST, -- :: (forall s. ST s a) -> a
fixST, -- :: (a -> ST s a) -> ST s a
-- * Converting 'ST' to 'IO'
RealWorld, -- abstract
stToIO, -- :: ST RealWorld a -> IO a
) where
import Control.Monad.ST.Imp
|
