[GHC] #5677: Allow the definition of extra functions in typeclass instances

[GHC]

#5677: Allow the definition of extra functions in typeclass instances
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    Reporter:  FUZxxl                        |       Owner:                           
        Type:  feature request               |      Status:  infoneeded               
    Priority:  normal                        |   Milestone:  _|_                      
   Component:  Compiler                      |     Version:  7.2.1                    
    Keywords:  instance typeclass extension  |          Os:  Unknown/Multiple         
Architecture:  Unknown/Multiple              |     Failure:  GHC rejects valid program
  Difficulty:  Unknown                       |    Testcase:                           
   Blockedby:                                |    Blocking:                           
     Related:                                |  
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Changes (by igloo):

  * status:  new => infoneeded
  * difficulty:  => Unknown
  * milestone:  => _|_


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5677#comment:2>
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