[GHC] #9816: Add function for size-checked conversion of Integral types

[GHC]

#9816: Add function for size-checked conversion of Integral types
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              Reporter:  spl         |            Owner:
                  Type:  feature     |           Status:  new
  request                            |        Milestone:
              Priority:  normal      |          Version:  7.9
             Component:              |         Keywords:
  libraries/base                     |     Architecture:  Unknown/Multiple
            Resolution:              |       Difficulty:  Unknown
      Operating System:              |       Blocked By:
  Unknown/Multiple                   |  Related Tickets:
       Type of failure:              |
  None/Unknown                       |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by spl):

 Phab diff coming momentarily, I hope.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9816#comment:1>
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