[GHC] #13841: ADOPT pragma for silencing orphan instances warnings per instance

[GHC]

#13841: ADOPT pragma for silencing orphan instances warnings per instance
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        Reporter:  cocreature        |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #602, #10150      |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 > If we are in the business of suppressing warnings, we really should have
 a general mechanism that could work for any warning by delimiting regions
 of code that should have the warning disabled

 There is much to be said for that, thank you.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13841#comment:3>
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