[GHC] #1777: Refactor the implementation of arrow notation

[GHC]

#1777: Refactor the implementation of arrow notation
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 Reporter:  simonpj   |          Owner:  ross       
     Type:  task      |         Status:  new        
 Priority:  normal    |      Milestone:  6.10 branch
Component:  Compiler  |        Version:  6.6.1      
 Severity:  normal    |     Resolution:             
 Keywords:            |     Difficulty:  Unknown    
 Testcase:            |   Architecture:  Unknown    
       Os:  Unknown   |  
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Changes (by igloo):

  * milestone:  => 6.10 branch

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1777#comment:1>
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