Adrian Neumann wrote:
Now I'd like to get a new StdGen, in case no id was supplied to the script.
>
parse :: Maybe String-> IO StdGen
parse (Just x) = return $ read x
parse Nothing = getStdGen
Obviously this doesn't work because I'm trying to do IO inside CGI
(right?). Is there some incantation I can perform to make this possible?
Abracadabra, the incantation is
liftIO :: IO a -> CGI a
i.e.
parse :: Maybe String-> CGI StdGen
parse (Just x) = return $ read x
parse Nothing = liftIO getStdGen
Regards,
apfelmus
_______________________________________________
Haskell-Cafe mailing list
Haskell-Cafe@haskell.org
http://www.haskell.org/mailman/listinfo/haskell-cafe
