[GHC] #12389: Limit duplicate export warnings for datatypes

[GHC]

#12389: Limit duplicate export warnings for datatypes
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        Reporter:  dfeuer            |                Owner:  parsonsmatt
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:  8.4.1
       Component:  Compiler          |              Version:  7.10.3
      Resolution:                    |             Keywords:  newcomer
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Incorrect         |  Unknown/Multiple
  warning at compile-time            |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #11959            |  Differential Rev(s):  Phab:D4134
       Wiki Page:                    |
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Comment (by parsonsmatt):

 You're correct -- that is what I meant :)

 I've collected the notes into a [https://github.com/ghc-proposals/ghc-
 proposals/pull/87 GHC Proposal #87]. I'll submit the proposal to the wider
 community and see what comes of that.

 Thanks!

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12389#comment:15>
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