[Haskell-cafe] Arrow preprocessor and *** combinator

Peter Verswyvelen bugfact at gmail.com
Thu Apr 30 13:42:36 EDT 2009

Thanks Ross.
Does anyone know how to tackle this? Combining GHC's builtin arrow processor
and rewrite rules?

On Wed, Apr 29, 2009 at 3:43 PM, Ross Paterson <ross at soi.city.ac.uk> wrote:

> On Wed, Apr 29, 2009 at 03:07:25PM +0200, Peter Verswyvelen wrote:
> > After doing some pragmatic tests, it seems that neither the arrow
> preprocessor
> > nor GHC's builtin one generate / optimize to the (***) combinator.
> Right, neither of them do that.  It might be possible to do that using
> GHC rules, but it isn't done at the moment.
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