[GHC] #12426: Allow smart constructors their own types

[GHC]

#12426: Allow smart constructors their own types
-------------------------------------+-------------------------------------
        Reporter:  dfeuer            |                Owner:
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
                                     |  PatternSynonyms
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #8581             |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by mpickering):

 * keywords:   => PatternSynonyms
 * related:   => #8581


Comment:

 This is essentially #8581.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12426#comment:1>
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