[GHC] #9163: Ptr should have a phantom role

[GHC]

#9163: Ptr should have a phantom role
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        Reporter:  simonpj           |            Owner:
            Type:  bug               |           Status:  new
        Priority:  normal            |        Milestone:
       Component:  Compiler          |          Version:  7.8.2
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by rwbarton):

 Replying to [comment:11 goldfire]:
 > Helpful comments, rwbarton. Is the same true for `FunPtr`? I would
 assume so.
 My knee-jerk reaction is "not sure"; I am thinking that while the normal
 way to consume a `Ptr` is to `peek` and `poke` it, the normal way to
 consume a `FunPtr` is with a `foreign import ccall "dynamic"` wrapper, and
 I'm not sure they are obviously analogous situations.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9163#comment:12>
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