[GHC] #14478: Abstract pattern synonyms (for hsig and hs-boot)

[GHC]

#14478: Abstract pattern synonyms (for hsig and hs-boot)
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        Reporter:  ezyang            |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.2.1
  checker)                           |
      Resolution:                    |             Keywords:  backpack
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 goldfire):

 I actually like the proposed syntax with the ellipsis. I would just vote
 for `..` (two dots), because that's already a lexeme (and is what closed
 type families use).

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14478#comment:3>
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