[GHC] #5144: Pattern synonyms

[GHC]

#5144: Pattern synonyms
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        Reporter:  simonpj           |            Owner:  cactus
            Type:  feature request   |           Status:  new
        Priority:  normal            |        Milestone:  _|_
       Component:  Compiler          |          Version:
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by igloo):

 Ah, I see, I had expected that something defined with "pattern" (e.g.
 `pattern Arrow t1 t2 = App "->" [t1, t2]`) could only be used as a
 pattern. I think a different keyword, e.g. "synonym" (or perhaps "view",
 as Simon suggested) would be better in that case.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/5144#comment:28>
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