[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:  jstolarek
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:  8.0.1
       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 Rev(s):
       Wiki Page:                    |
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Comment (by jstolarek):

 > Your `GadtC` is missing a place for a `[TyVarBndr]` (to store the
 quantified type variables, both universals and existentials) and a `Cxt`
 to store any extra constraints.
 My intention was to nest `GadtC` inside `ForallC`. Is there any reason why
 this wouldn't work?

 > It also forbids record syntax, but maybe we can live without GADT record
 syntax.
 Ok, I haven't thought about that one. TBH I think I have never used (or
 seen) GADTs with record syntax.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10828#comment:11>
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