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

[GHC]

#667: Efficient Map <-> Set conversions
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  Reporter:  jpbernardy                |          Owner:         
      Type:  feature request           |         Status:  new    
  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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Comment (by jpbernardy):

 This ticket is resolved for the new AVL-based types.

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