[GHC] #996: Add ranged sets

[GHC]

#996: Add ranged sets
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 Reporter:  pauljohnson     |          Owner:         
     Type:  proposal        |         Status:  new    
 Priority:  normal          |      Milestone:         
Component:  libraries/base  |        Version:  6.6    
 Severity:  normal          |     Resolution:         
 Keywords:                  |     Difficulty:  Unknown
 Testcase:                  |   Architecture:  Unknown
       Os:  Unknown         |  
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Comment (by simonmar):

 Is there a good reason this has to be in base rather than in a separate
 package?

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/996>
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