Re: [Haskell-cafe] elementary Maybe Monad problem .. sigh

Galchin, Vasili wrote:

data Bozo = Bozo { id :: Int }

bonzo :: Maybe Bozo -> IO () bonzo maybe_bozo = do if maybe_bozo == (Just (Bozo x)) then return () else return () ~

I want "x" to be a pattern that matches "id" .... ??

Try: bonzo (Just (Bozo x)) = return () bonzo Nothing = return ()

Kind regards, Vasili

Claude -- http://claudiusmaximus.goto10.org