[GHC] #7730: :info and polykinds

[GHC]

#7730: :info and polykinds
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        Reporter:  monoidal                 |            Owner:  archblob
            Type:  bug                      |           Status:  new
        Priority:  normal                   |        Milestone:  7.8.1
       Component:  Compiler (Type checker)  |          Version:  7.6.2
      Resolution:                           |         Keywords:
Operating System:  Unknown/Multiple         |     Architecture:
 Type of failure:  None/Unknown             |  Unknown/Multiple
       Test Case:                           |       Difficulty:  Unknown
        Blocking:                           |       Blocked By:
                                            |  Related Tickets:  #8776
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Comment (by archblob):

 I have managed to fix this (not yet for kind!) using the tidying machinery
 from {{{ MkIface}}}.

 I first tried going through {{{IfaceDecl}}} as Simon suggested here and in
 #8776, but this gets really messy because as Gergo observed
 {{{tyThingToIfaceDecl}}} doesn't work for {{{RealDataCon}}}, and I also
 observed the same story for {{{ClassOpId}}} and this will require us keep
 {{{TyThing}}} in certain cases. I thing this will lead to code that is
 more complex and harder to understand in the long run.

 I also haven't looked into how this relates to #8776 but I thing we can
 also go without conversion to {{{IfaceDecl}}} in that case.

 I will have a patch ready in a couple of days(some other things came up)
 and after we further discuss the right aproach.

 Andrei

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7730#comment:10>
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