[Haskell-cafe] Re: Fwd: Is () a 0-length tuple?
ketil at malde.org
Sun Nov 8 06:44:06 EST 2009
Jon Fairbairn <jon.fairbairn at cl.cam.ac.uk> writes:
> The "empty" type in Haskell would be (forall a.a) which has no
> non-bottom values.
With an extension, you can also define:
data Void -- without any constructors
which is perhaps closer to null types in other languages?
If I haven't seen further, it is by standing in the footprints of giants
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