Chris,
Yes, I do derive Show for MyData. I was surprised it did not work.
Mike
-----Original Message-----
From: Chris Angus [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, May 09, 2000 12:57 AM
To: 'Mike Jones'; [EMAIL PROTECTED]
Subject: RE: Showing tuples
Do you derive Show for MyData?
> -----Original Message-----
> From: Mike Jones [mailto:[EMAIL PROTECTED]]
> Sent: 09 May 2000 05:58
> To: [EMAIL PROTECTED]
> Subject: Showing tuples
>
>
> Hi,
>
> I am having trouble with Show and tuples.
>
> I have a data structure, say:
>
> data MyData = ...
>
> And a value, say:
>
> value = (MyData..., MyData..., MyData)
>
> Then try to:
>
> show value
>
> I get a compiler message from ghc 4.05 that says:
>
> No instance for `Show (MyData, MyData, MyData)...
>
> What is the best way to deal with this problem?
>
> Thanks,
>
> Mike
>
>
