Dnia pon 14. lipca 2003 10:18, Graham Klyne napisał: > I must be missing something... isn't the effect achieved by: > class (Add a, Subtract a, FromInteger a, Eq a, Multiply a, ...) => Num a > ?
It doesn't provide instances of Num for anything which is already an instance of the other classes. And in Haskell 98 they must be defined separately for each type, instance (...) => Num a doesn't work. -- __("< Marcin Kowalczyk \__/ [EMAIL PROTECTED] ^^ http://qrnik.knm.org.pl/~qrczak/ _______________________________________________ Haskell-Cafe mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell-cafe