[GHC] #10635: -fwarn-redundant-constraints should not be part of -Wall

[GHC]

#10635: -fwarn-redundant-constraints should not be part of -Wall
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        Reporter:  Lemming           |                Owner:
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  7.11
  checker)                           |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Incorrect         |  Unknown/Multiple
  warning at compile-time            |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #9939, #9973,     |  Differential Rev(s):
  #10100, #10183                     |
       Wiki Page:                    |
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Comment (by Lemming):

 Replying to [comment:10 simonpj]:
 > I think it might be simpler just to say
 > {{{
 > {-# NO_WARN_REDUNDANT_CONSTRAINTS singleton #-}
 > }}}

 My goal was to somehow mark the redundant constraints, as we do with
 unused identifiers.
 I would not like to let the type checker ignore all redundant constraints
 at once in a signature.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10635#comment:11>
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