[GHC] #4488: Warn about unnecessary fromIntegral and other conversions

[GHC]

#4488: Warn about unnecessary fromIntegral and other conversions
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    Reporter:  mitar             |        Owner:              
        Type:  feature request   |       Status:  new         
    Priority:  normal            |    Milestone:              
   Component:  Compiler          |      Version:  6.12.3      
    Keywords:                    |     Testcase:              
   Blockedby:                    |   Difficulty:              
          Os:  Unknown/Multiple  |     Blocking:              
Architecture:  Unknown/Multiple  |      Failure:  None/Unknown
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Comment(by simonpj):

 Can you be precise?  Which other conversion functions do you have in mind?

 I don't think this would be too hard to implement.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4488#comment:3>
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