[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):

 Most of the Data.Functor.* suite is amenable to this treatment, yes.

 I've been programming with rather excessively generalized kinds on a large
 chunk of code for a couple of years now with surprisingly few problems.

 However, as we don't currently have those instances in `base` this is
 definitely a concern for future `base` efforts, not so much for now.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10039#comment:10>
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