Using the type definition:
data Term a = T a [Term a]
I run the precomplied Hugs version on a Mac and another one under Sun OS.
The first accepts the instance definition:
instance Show (Term String) where ..
The second reports
syntax error in instance head (variable expected)
and accepts if I write:
instance Show a => Show (Term a) where ..
Why do the systems react differently???
Best regards,
Peter
---
Peter Padawitz
Informatik 5
University of Dortmund
D-44221 Dortmund
Germany
phone +49-231-755-5108
fax +49-231-755-4851 or -5802
secretary +49-231-755-5801
email [EMAIL PROTECTED]
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