[GHC] #5682: Properly parse promoted data constructor operators

[GHC]

#5682: Properly parse promoted data constructor operators
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        Reporter:  lunaris           |            Owner:
            Type:  bug               |           Status:  new
        Priority:  normal            |        Milestone:  7.8.1
       Component:  Compiler          |          Version:  7.8.1-rc1
  (Parser)                           |         Keywords:  PolyKinds, ghc-
      Resolution:                    |  kinds
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  GHC rejects       |       Difficulty:  Unknown
  valid program                      |       Blocked By:
       Test Case:                    |  Related Tickets:  #8486
  parser/should_compile/T5682        |
        Blocking:                    |
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Comment (by simonpj):

 I have not reviewed in detail, but what you say sounds good.

 Would someone like to update the user-manual documentation (if necessary),
 validate, and commit?

 Simon

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/5682#comment:17>
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