[GHC] #10828: TH could do a better job of representing GADTs

[GHC]

#10828: TH could do a better job of representing GADTs
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        Reporter:  spinda            |                   Owner:
            Type:  feature request   |                  Status:  new
        Priority:  normal            |               Milestone:  7.12.1
       Component:  Template Haskell  |                 Version:  7.10.2
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Comment (by simonpj):

 > The one tiny caveat is the new feature for deriving Foldable for GADTs,
 which distinguishes among the two forms above. (I can't find a reference
 to this change. Can you? It was described at Haskell Implementors'
 Workshop a few days ago. You, the reader, if you know the reference,
 please add it!)

 See [wiki:Commentary/Compiler/DeriveFunctor] and #10447.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10828#comment:5>
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