[Hugs-users] newbie problem help pliz

[Jon Fairbairn]

On 2006-05-14 at 14:38+0330 Arash wrote:

> ERROR "RN_Comp.hugs":18 - Type error in application
> *** Expression     : fromInteger . fromEnum
> *** Term           : fromInteger
> *** Type           : Integer -> a
> *** Does not match : Int -> a
> 
> which is for this function:
> 
> {--------------------------------------------}
> {- moving to traditional signed-digit       -}
> {--------------------------------------------}
> fromDigit :: Digit -> Integer
> fromDigit =(\n -> n - 1).fromInteger.fromEnum
> 
> Could anyone help me please fix this problem?

   Prelude> :t fromInteger
   fromInteger :: (Num a) => Integer -> a
   Prelude> :t fromIntegral
   fromIntegral :: (Num b, Integral a) => a -> b

so you just need to use fromIntegral instead of fromInteger

 Jón

-- 
Jón Fairbairn                              Jon.Fairbairn at cl.cam.ac.uk