[GHC] #14060: TH-reified types can suffer from kind signature oversaturation

[GHC]

#14060: TH-reified types can suffer from kind signature oversaturation
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        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Template Haskell  |              Version:  8.2.1
      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 goldfire):

 Yes, a dependent quantifier would be in `K`.

 Yes about your initial understanding about "`ty` itself": I was saying
 that the tyvar `a` is in an injective position within the type `a`.

 Actually, GHC's pure unifier is easy enough to invoke, but I think that
 route is likely to be harder to reason about than my algorithm above. Yes,
 it's a bit long to state, but I think just a few lines of Haskell code
 will implement it nicely.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14060#comment:4>
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