[GHC] #15200: RFC: export WordPtr from Data.Word and IntPtr from Data.Int rather than only from Foreign.Ptr

[GHC]

#15200: RFC: export WordPtr from Data.Word and IntPtr from Data.Int rather than
only from Foreign.Ptr
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           Reporter:  carter         |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:  8.6.1
          Component:  Compiler       |           Version:  8.4.3
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 Currently we have two types (WordPtr and IntPtr) that should live / be
 exposed from Data.Word and Data.Int respectively that currently are not

 reasons for the inclusion

 1) It seems odd to have Word and Int types in base that public types but
 aren't exposed by the name sake modules

 2) more broadly: while GHC and much extent haskell code makes the strong
 assumption systematically that Pointers/memory addresses are the same size
 as Word/Int, this is not guaranteed by haskell 2010 OR the FFI addendum
 https://www.haskell.org/onlinereport/haskell2010/haskellch8.html

 thusly, adding WordPtr and IntPtr to the standard on the haskell side is
 part of a small list of goals i have for inclusion in haskell 2020.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15200>
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