[Haskell-cafe] "datakind" declaration

[Daniel Peebles]

It's not quite what you're asking for, but a very similar idea is the SHE
preprocessor: http://personal.cis.strath.ac.uk/~conor/pub/she/

Dan

On Mon, Feb 22, 2010 at 8:08 PM, Paul Brauner <paul.brauner at loria.fr> wrote:

> Hello,
>
> I remember seeing something like
>
> > typedata T = A | B
>
> somewhere, where A and B are type constructors, but I can't find it in
> the ghc doc. Have I been dreaming or is it some hidden feature ?
>
> Paul
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