[GHC] #727: Write a generic Trie.

[GHC]

#727: Write a generic Trie.
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    Reporter:  jpbernardy       |        Owner:             
        Type:  feature request  |       Status:  new        
    Priority:  normal           |    Milestone:             
   Component:  libraries/base   |      Version:  6.4.1      
    Severity:  normal           |     Keywords:  collections
          Os:  Unknown          |   Difficulty:  Unknown    
Architecture:  Unknown          |  
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Write a generic Trie, for example based on
 http://www.informatik.uni-bonn.de/~ralf/publications/Masses.pdf

 See also http://www.eyrie.org/~zednenem/2006/gentrie/

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/727>
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