[GHC] #15707: More liberally kinded coercions for newtypes

[GHC]

#15707: More liberally kinded coercions for newtypes
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        Reporter:  mniip             |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler (Type    |              Version:  8.6.1
  checker)                           |
      Resolution:                    |             Keywords:  Roles
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #12369            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by goldfire):

 But do you have a concrete program (invent syntax if necessary) that uses
 this feature? It's much easier to understand the implications of it all
 with an example.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15707#comment:5>
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