[GHC] #12766: Allow runtime-representation polymorphic data families

[GHC]

#12766: Allow runtime-representation polymorphic data families
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        Reporter:  Iceland_jack      |                Owner:
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:  TypeInType
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #12369            |  Differential Rev(s):
       Wiki Page:                    |
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Description changed by Iceland_jack:

@@ -1,1 +1,1 @@
- This is an offshoot of #12369 (‘ data families shouldn't be required to
+ This is an offshoot of #12369 (‘data families shouldn't be required to

New description:

 This is an offshoot of #12369 (‘data families shouldn't be required to
 have return kind *, data instances should’), allowing family declarations
 something like:

 {{{#!hs
 data family Array a :: TYPE rep
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12766#comment:1>
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