[GHC] #7688: :kind should do kind generalisation

[GHC]

#7688: :kind should do kind generalisation
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    Reporter:  simonpj           |       Owner:                  
        Type:  bug               |      Status:  new             
    Priority:  normal            |   Milestone:  7.8.1           
   Component:  Compiler          |     Version:  7.6.2           
    Keywords:                    |          Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |     Failure:  None/Unknown    
  Difficulty:  Unknown           |    Testcase:                  
   Blockedby:                    |    Blocking:                  
     Related:                    |  
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Comment(by dreixel):

 Replying to [comment:5 simonpj]:
 > I do wonder whether, at least for `:kind`, we could temporarily switch
 on `PolyKinds`, precisely to get the type generalised.  That would be
 easy; would have no effect if the types mentioned were not themselves
 polykinded; and would probably lead to fewer surprises.

 I think this is a good idea, and I couldn't come up with an example where
 a user might be possibly surprised at seeing unexpected polykinded stuff
 (since we default kinds to `*` when `PolyKinds` is off).

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7688#comment:6>
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