[GHC] #1816: Add Data.Set.mapMaybe

[GHC]

#1816: Add Data.Set.mapMaybe
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    Reporter:  guest           |        Owner:         
        Type:  proposal        |       Status:  new    
    Priority:  normal          |    Milestone:  Not GHC
   Component:  libraries/base  |      Version:  6.8    
    Severity:  normal          |   Resolution:         
    Keywords:                  |   Difficulty:  Unknown
          Os:  Unknown         |     Testcase:         
Architecture:  Unknown         |  
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Changes (by guest):

 * cc: nominolo at gmail.com (added)

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1816#comment:1>
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