[GHC] #10607: Auto derive from top to bottom

[GHC]

#10607: Auto derive from top to bottom
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        Reporter:  songzh            |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.11
      Resolution:                    |             Keywords:  deriving,
                                     |  typeclass, auto
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #13324            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by songzh):

 Replying to [comment:25 RyanGlScott]:
 > Great! Do you consider this issue to be resolved, then?
 Yes, please close it. I will update `derive-topdown` a bit when I have
 time. After that I will have a look
 [https://ghc.haskell.org/trac/ghc/ticket/13368] and try to make it
 possible with `derive-topdown`. I suppose that we could write an essay or
 paper to summarize all this deriving stuffs.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10607#comment:26>
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