[GHC] #12369: data families shouldn't be required to have return kind *, data instances should

[GHC]

#12369: data families shouldn't be required to have return kind *, data instances
should
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        Reporter:  ekmett            |                Owner:
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Compiler (Type    |              Version:  8.0.1
  checker)                           |
      Resolution:                    |             Keywords:
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 simonpj):

 Interesting idea.  I can't see a technical problem with it, so maybe we
 could just allow it.  If someone would like to have a go, I'd be a willing
 reviewer.

 Alternatively, if it becomes Important to a bunch of people, I could have
 a go myself.

 Simon

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12369#comment:1>
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