10 Jan
2006
10 Jan
'06
7:48 p.m.
Am Montag, 9. Januar 2006 19:42 schrieb Twan van Laarhoven:
[...]
But why is not every instance of MonadPlus also an instance of Monoid?
instance MonadPlus m => Monoid (m a) where mempty = mzero mappend = mplus
I think that this is not legal Haskell 98.
[...]
Best wishes, Wolfgang