[GHC] #7492: Generic1 deriving: Can we replace Rec1 f with f :.: Par1?

[GHC]

#7492: Generic1 deriving: Can we replace Rec1 f with f :.: Par1?
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        Reporter:  spl               |                Owner:  dreixel
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.7
      Resolution:                    |             Keywords:  Generics
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 RyanGlScott):

 This `Functor` issue might become less important in the future if we
 switch over to using a coercion-based approach to deriving `Generic1`. See
 https://ghc.haskell.org/trac/ghc/ticket/8516#comment:5 for more info.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7492#comment:10>
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