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

[Ross Paterson]

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.