[Hugs-users] A New Notation for Arrows

Ross Paterson ross at soi.city.ac.uk
Thu May 31 10:08:15 EDT 2007

On Thu, May 31, 2007 at 02:55:49PM +0100, bft wrote:
> Is there any version of Haskell (Hugs or Ghc) which includes the new
> notation of arrows introduced by Ross Paterson ?  Instead, where can I get
> it ? The Control.Arrow.hs file did not include the new notation of
> arrows.

It's supported by GHC 6.2 and later, with the -farrows option
(see the GHC User's Guide).  To use arrow notation with Hugs or
any other Haskell implementation, you need the arrows preprocessor

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