[GHC] #13175: Documenting what can be derived 'out of the box' by GHC's "deriving"

[GHC]

#13175: Documenting what can be derived 'out of the box' by GHC's "deriving"
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           Reporter:  carette        |             Owner:
               Type:  task           |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Documentation  |           Version:  8.0.1
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  Documentation
  Unknown/Multiple                   |  bug
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 Nowhere in the documentation is it clearly stated which classes can be
 derived (assuming extensions as necessary) by GHC's "deriving" mechanism.
 As determined by reading the sources, this appears to be

   - Bounded, Enum, Eq, Ix, Ord, Read, Show, Functor, Foldable,
 Traversable, Generic, Generic1, Data, Lift.

 This was discussed on haskell-cafe -- see
 https://mail.haskell.org/pipermail/haskell-cafe/2016-October/125379.html.

 PS: I would be willing to fix this myself, if only I knew *where* to
 insert that information so that it is easily ''findable''!

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13175>
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