[project @ 2002-04-24 16:31:37 by simonmar]
[packages/base.git] / Data / STRef.hs
1 -----------------------------------------------------------------------------
2 -- |
3 -- Module : Data.STRef
4 -- Copyright : (c) The University of Glasgow 2001
5 -- License : BSD-style (see the file libraries/core/LICENSE)
6 --
7 -- Maintainer : libraries@haskell.org
8 -- Stability : experimental
9 -- Portability : non-portable (requires non-portable module ST)
10 --
11 -- $Id: STRef.hs,v 1.4 2002/04/24 16:31:40 simonmar Exp $
12 --
13 -- Mutable references in the ST monad.
14 --
15 -----------------------------------------------------------------------------
16
17 module Data.STRef (
18 STRef, -- abstract, instance Eq
19 newSTRef, -- :: a -> ST s (STRef s a)
20 readSTRef, -- :: STRef s a -> ST s a
21 writeSTRef, -- :: STRef s a -> a -> ST s ()
22 modifySTRef -- :: STRef s a -> (a -> a) -> ST s ()
23 ) where
24
25 import Prelude
26
27 #ifdef __GLASGOW_HASKELL__
28 import GHC.STRef
29 #endif
30
31 import Data.Dynamic
32
33 #include "Dynamic.h"
34 INSTANCE_TYPEABLE2(STRef,stRefTc,"STRef")