Re: [GHC] #15592: Type families without CUSKs cannot be given visible kind variable binders

3 Sep 2018

      #15592: Type families without CUSKs cannot be given visible kind variable binders
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        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.4.3
      Resolution:                    |             Keywords:
                                     |  TypeApplications, TypeFamilies,
                                     |  CUSKs
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 simonpj):

 Yes, I would expect

 * In T1
   * a is `Specified`

 * In T2
   * k is `Inferred`
   * a is `Specified`

 See `Note [TyVarBndrs, TyVarBinders, TyConBinders, and visibility]` in
 `TyCoRep`.

 Richard, what do you say?

 (This will start to bite when we get visible kind application.)

-- 
Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15592#comment:1
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