Yes, there are several reasons for having UNSAFE in the name. :-)
-- Lennart
Ashley Yakeley wrote:
>At 2002-11-18 11:05, Sven Panne wrote:
>
>
>
>>global :: a -> IORef a
>>global a = unsafePerformIO (newIORef a)
>>
>>
>
>This is useful, you can do this with it:
>
> ref = global Nothing
>
> convert :: a -> IO b
> convert a = do
> writeIORef ref (Just a)
> Just b <- readIORef ref
> return b
>
>
>
>