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? [SNIP] > 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