[GHC] #4180: do not consider associativity for unary minus for fixity resolution

[GHC]

#4180: do not consider associativity for unary minus for fixity resolution
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    Reporter:  maeder             |        Owner:              
        Type:  proposal           |       Status:  new         
    Priority:  normal             |    Milestone:              
   Component:  Compiler           |      Version:  6.12.3      
    Keywords:  fixity resolution  |   Difficulty:              
          Os:  Unknown/Multiple   |     Testcase:              
Architecture:  Unknown/Multiple   |      Failure:  None/Unknown
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Comment(by simonmar):

 If we made it the default then we would not be implementing Haskell 2010.
 That's ok, but we have to document very carefully the ways in which we
 diverge from the standard, which we do in the User's Guide:
 [http://www.haskell.org/ghc/docs/6.12.2/html/users_guide/bugs-and-
 infelicities.html#vs-Haskell-defn].

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4180#comment:5>
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