Am Dienstag, 13. April 2004 16:07 schrieb Paul Cosby:

Hi,

I am very new to haskell and the program hugs and I am having problems using the wildcard operator _

Every time I try to use it in an definition it says something like the symbol /017 is not recognised.

Are you sure that it says "/017"? Maybe, it says "\017" or "\17". If this is the case, it is because of a control character in your source file.

I am sure my defintions are correct as I tested it with an example defintion from Alan Thompsons craft of functional programming book.

Could you post an example to this list?

I am guessing that all the relevant modules have not been loaded properly.

I doubt that this is the reason.

I have reinstalled hugs with full implementation and this has not helped. I am using a windows 98 PC.

Any help suggestions? Or has anyone just got the wildcard definition which are could just paste into my scripts

Try, for example, the following: isZero :: Integer -> Bool isZero 0 = True isZero _ = False It works with my installation of Hugs.

Many thanks

Your welcome. Wolfgang