[Haskell-cafe] Re: nested maybes

[Bulat Ziganshin]

Hello Martin,

Monday, February 5, 2007, 2:47:33 AM, you wrote:

> main = do
>    minput <- getInput
>    case minput of
>      Nothing -> printError
>      Just input -> do
>        mresult <- processInput input
>        case mresult of
>          Nothing -> printError
>          Just result -> printResult result

main = do
  getInput >>= maybe printError $ \input -> do
  ...

  


-- 
Best regards,
 Bulat                            mailto:Bulat.Ziganshin at gmail.com