Using Set: Hypergraph type
Marcin 'Qrczak' Kowalczyk
4 Sep 2001 18:06:10 GMT
Tue, 4 Sep 2001 20:28:55 +0300, Eray Ozkural <firstname.lastname@example.org> pisze:
> Okay, I guess I got it now. The (types of) elements of a Set ought
> to be instances of Ord. So I presume Edison supports only flat sets.
You can add an inefficient implementation of Ord (Set a) yourself:
instance Ord a => Ord (Set a) where
compare s1 s2 = compare (toOrdList s1) (toOrdList s2)
toOrdList seems to be exported only module Collection.
If more than one module does this, they can't be used together.
__("< Marcin Kowalczyk * email@example.com http://qrczak.ids.net.pl/
^^ SYGNATURA ZASTĘPCZA