On Sat, Sep 21, 2002 at 02:55:24PM +0200, Frank Atanassow wrote: > > Almost. But then showA and showB are partial. It's better to do this: > > showA s = "A " ++ s > > and similarly for B, and then: > > data D = A String | B String > instance Show D where > show (A s) = showA s > show (B s) = showB s > instance Read D where > readsPrec _ = readsD > readD s = (readsA s) ++ (readsB s)
Thank you for this advice! This solved my quandry quite cleanly. -- David Roundy http://civet.berkeley.edu/droundy/ _______________________________________________ Haskell-Cafe mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell-cafe
