[GHC] #11519: Inferring non-tau kinds

[GHC]

#11519: Inferring non-tau kinds
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        Reporter:  goldfire          |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.1
      Resolution:                    |             Keywords:  TypeInType
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 think that using `ExpType`s is exactly the right thing here.
 Interestingly we used to have a variant of `ExpType`, called `ExpKind`:
 {{{
 data ExpKind = EK TcKind (TcKind -> SDoc)
 }}}
 but that has gone now.  I'm not sure how you managed to keep the error
 messages good without that `SDoc` argument, but I'm all for the
 simplification.

 So now perhaps `ExpType` will do just fine.

 I also agree with Adam about explicit quantification.  (Both are
 independently useful.)  And in fact I think that the declaration he give
 is accepted already -- an entirely un-documented feature.   Adding some
 docs for it would be good.

 Simon

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11519#comment:2>
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