[GHC] #667: Efficient Map <-> Set conversions

[GHC]

#667: Efficient Map <-> Set conversions
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  Reporter:  jpbernardy                |          Owner:  jpbernardy
      Type:  feature request           |         Status:  assigned  
  Priority:  normal                    |      Milestone:            
 Component:  libraries/base            |        Version:  6.4.1     
  Severity:  normal                    |     Resolution:            
  Keywords:  Data Map Set collections  |             Os:  Unknown   
Difficulty:  Unknown                   |   Architecture:  Unknown   
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Changes (by jpbernardy):

  * status:  new => assigned
  * owner:  => jpbernardy

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/667>
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