[GHC] #9123: Need for higher kinded roles

[GHC]

#9123: Need for higher kinded roles
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        Reporter:  simonpj           |            Owner:
            Type:  bug               |           Status:  new
        Priority:  normal            |        Milestone:
       Component:  Compiler          |          Version:  7.8.2
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by goldfire):

 Just wrote up [wiki:Roles2 this wiki page] describing the design and
 laying out some challenges. The page includes a pie-in-the-sky idea for a
 new design for roles that might fix this problem, at the cost of quite a
 bit more complexity.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9123#comment:10>
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