Empty Datatypes in GHC 5?
Alastair David Reid
07 Jun 2001 18:55:21 -0600
Ashley Yakeley <firstname.lastname@example.org> writes:
> data Zero; data Succ n;
> Unfortunately this is contrary to the Haskell
> Report. Nevertheless, Hugs allows it. But GHC, apparently,
> does not.
Note that Hugs allows it principally so that we can write the following
in the Prelude:
That it's useful for other things is pretty much incidental.
Alastair Reid email@example.com http://www.cs.utah.edu/~reid/