add Foldable and Traversable instances for Either a and (,) a
authorRoss Paterson <ross@soi.city.ac.uk>
Fri, 31 May 2013 01:25:57 +0000 (02:25 +0100)
committerRoss Paterson <ross@soi.city.ac.uk>
Fri, 31 May 2013 01:25:57 +0000 (02:25 +0100)
commita9a9ce679e0c57437a17824cd6366d085248d217
tree7545655d7ae8a40cb7c11e3774be91e9e73bd760
parent216d59079cf33647d677b1314e693a49f9e515a8
add Foldable and Traversable instances for Either a and (,) a

Agreed in January 2011, but not implemented:

http://thread.gmane.org/gmane.comp.lang.haskell.libraries/15196
http://thread.gmane.org/gmane.comp.lang.haskell.libraries/17686
http://thread.gmane.org/gmane.comp.lang.haskell.libraries/19594
Data/Foldable.hs
Data/Traversable.hs