[GHC] #13115: missing data instances for IntPtr and WordPtr in base

[GHC]

#13115: missing data instances for IntPtr and WordPtr in base
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        Reporter:  carter            |                Owner:  sighingnow
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:  newcomer
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 bgamari):

 I actually don't know that you need `GeneralizedNewtypeDeriving` here. The
 usual `DeriveDataTypeable` should do just fine I believe.

 Otherwise, yes. It looks like you have the right idea. Do make sure to add
 `@since` annotations in the Haddock documentation for the new instances.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13115#comment:6>
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