patch applied (packages/base): add alternative functors and extra instances

Ross Paterson ross at soi.city.ac.uk
Mon Aug 21 11:24:27 EDT 2006


Mon Aug 21 08:21:51 PDT 2006  Ross Paterson <ross at soi.city.ac.uk>
  * add alternative functors and extra instances
  
  * Alternative class, for functors with a monoid
  * instances for Const
  * instances for arrows

    M ./Control/Applicative.hs -9 +64


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