Manuel M T Chakravarty
chak at cse.unsw.edu.au
Wed Sep 11 02:42:55 EDT 2002
Malcolm Wallace <Malcolm.Wallace at cs.york.ac.uk> wrote,
> > Wolfram Kahl suggested to add functions isNullPtr and
> > isNullFunPtr (with the expected semantics) to the Ptr
> > module. Opinions?
> Ptr and FunPtr are already instances of Eq, so which is easier to type?
> isNullPtr x
> So I don't see the motivation for the new predicates, but I don't have
> any objections either.
Sure, but there is also
null = (== )
in the Prelude and `Maybe.isNothing'. So, the reasoning for
adding these two functions would be that Haskell has a
tradition of providing predicates like this as alternatives
to the explicit use of (==).
Personally, I also don't care much in either direction. Any
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