[GHC] #5676: Typeclass instance function type declarations

[GHC]

#5676: Typeclass instance function type declarations
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    Reporter:  drb226            |       Owner:                                              
        Type:  feature request   |      Status:  new                                         
    Priority:  normal            |   Component:  Compiler (Type checker)                     
     Version:                    |    Keywords:  typeclass instance function type declaration
    Testcase:                    |   Blockedby:                                              
          Os:  Unknown/Multiple  |    Blocking:                                              
Architecture:  Unknown/Multiple  |     Failure:  GHC rejects valid program                   
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Changes (by FUZxxl):

 * cc: fuzxxl@… (added)
  * component:  Compiler => Compiler (Type checker)


Comment:

 Please implement this! This feature is great for new users and educative
 purposes as it allows to visualize the types of instance functions.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5676#comment:1>
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