[Haskell-cafe] (Co/Contra)Functor and Comonad

Stephen Tetley stephen.tetley at gmail.com
Thu Dec 23 23:25:35 CET 2010

On 23 December 2010 21:43, Mario Blažević <mblazevic at stilo.com> wrote:
> Why are Cofunctor and Comonad classes not a part of the base library?
> Later on I found that this question has been raised before by Conal Elliott,
> nearly four years ago.
> http://www.haskell.org/pipermail/libraries/2007-January/006740.html

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