Re: [Haskell-cafe] Shortening if-then-else

Is there a shorter way to write the if-then-else part below?

-- tryTakeSeat :: [Word8] -> Word8 -> ScriptState (Maybe Word8) tryTakeSeat _ _ = do ... if (cmdType cmd) /= (CmdSitError Server) then return $ Just seat_num else return Nothing --

tryTakeSeat _ _ = runMaybeT $ do ... guard $ cmdType cmd /= CmdSitError Server return seat_num -Yitz