[GHC] #10039: Make Const (Control.Applicative) kind polymorphic in its second argument

[GHC]

#10039: Make Const (Control.Applicative) kind polymorphic in its second argument
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        Reporter:  Iceland_jack      |                   Owner:  ekmett
            Type:  feature request   |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Core Libraries    |                 Version:  7.8.4
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
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Comment (by ekmett):

 I, for one, would support this.

 We already have packages out there that have to define their own kind-
 polymorphic `Const`, e.g. `vinyl`.

 http://hackage.haskell.org/package/vinyl-0.5.1/docs/Data-Vinyl-
 Functor.html#t:Const

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10039#comment:5>
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