[GHC] #9838: PatternSynonyms and ConstraintKinds should not be required at the use site.

[GHC]

#9838: PatternSynonyms and ConstraintKinds should not be required at the use site.
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              Reporter:  ekmett      |            Owner:
                  Type:  feature     |           Status:  new
  request                            |        Milestone:
              Priority:  normal      |          Version:  7.8.3
             Component:  Compiler    |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Unknown
  Unknown/Multiple                   |       Blocked By:
       Type of failure:              |  Related Tickets:
  None/Unknown                       |
             Test Case:              |
  patsyn/should_compile/ImpExp_Imp,  |
  polykinds/T9838                    |
              Blocking:              |
Differential Revisions:              |
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Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:"417b8746b9d3759a102160c4db882b18ac658a0e/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="417b8746b9d3759a102160c4db882b18ac658a0e"
 Don't require ConstraintKinds at usage sites (Trac #9838)
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9838#comment:9>
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