Marcin 'Qrczak' Kowalczyk
Wed, 23 Jan 2002 11:20:18 +0000 (UTC)
Fri, 18 Jan 2002 05:18:07 -0500, Feuer <email@example.com> pisze:
> Why is mzero in MonadPlus rather than a separate MonadZero class?
It used to be in MonadZero. In Haskell98 these two classes were merged
I guess it was to simplify the library and programs using these
classes: they are usually defined together and used together.
Can you give an example of a useful MonadZero instance without
MonadPlus which would be used by some function working on an arbitrary
__("< Marcin Kowalczyk * firstname.lastname@example.org http://qrczak.ids.net.pl/