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

Ross Paterson ross at soi.city.ac.uk
Wed Apr 29 09:43:32 EDT 2009

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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