[GHC] #14859: Allow explicit impredicativity

[GHC]

#14859: Allow explicit impredicativity
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        Reporter:  simonpj           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.2
      Resolution:                    |             Keywords:
                                     |  ImpredicativeTypes
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):

 I think it's at least ''plausible'' that explicit type application to
 polytypes would be OK.  It would take a little work make ''sure'' it was
 OK, but it is, as you say, much less ambitious than "Guarded impredicative
 polymorphism".

 A good project for someone.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14859#comment:5>
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