[GHC] #8961: Require PatternSynonyms language extension to *use* pattern synonyms

[GHC]

#8961: Require PatternSynonyms language extension to *use* pattern synonyms
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        Reporter:  cactus            |            Owner:
            Type:  bug               |           Status:  closed
        Priority:  normal            |        Milestone:  7.8.1
       Component:  Compiler (Type    |          Version:  7.8.1-rc2
  checker)                           |         Keywords:
      Resolution:  fixed             |     Architecture:  Unknown/Multiple
Operating System:  Unknown/Multiple  |       Difficulty:  Easy (less than 1
 Type of failure:  None/Unknown      |  hour)
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by simonpj):

 Is this documented in the user manual?

 If not, could it be, please?

 Simon

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8961#comment:5>
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