[Haskell-cafe] Higher Kinded Void

[Tom Ellis]

On Thu, Jun 25, 2015 at 07:50:38PM +0530, Anupam Jain wrote:
> data VoidF a
> instance Functor VoidF where
>   fmap = undefined
> 
> Is there a reason something like this is not in the package void?
> Perhaps we could even have Void1 with kind * -> *, Void2 with kind *
> -> * -> * etc.

You could use 'Const Void', 'Const (Const Void)' etc..

(Const is in Control.Applicative)