[GHC] #666: Collection hierarchy proposal

[GHC]

#666: Collection hierarchy proposal
------------------------------+---------------------------------------------
 Reporter:  jpbernardy        |          Owner:  jpbernardy
     Type:  feature request   |         Status:  new       
 Priority:  normal            |      Milestone:  _|_       
Component:  libraries/base    |        Version:  6.4.1     
 Severity:  normal            |     Resolution:            
 Keywords:  Data collections  |     Difficulty:  Unknown   
 Testcase:  N/A               |   Architecture:  Unknown   
       Os:  Unknown           |  
------------------------------+---------------------------------------------
Changes (by igloo):

  * milestone:  => _|_
  * testcase:  => N/A

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/666>
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