[GHC] #12708: RFC: Representation polymorphic Num

[GHC]

#12708: RFC: Representation polymorphic Num
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        Reporter:  Iceland_jack      |                Owner:
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Core Libraries    |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by goldfire):

 I think your first '''Edit:''' in comment:13 is orthogonal to the overall
 ticket and could be accomplished by generalizing `Eq` along similar lines
 to what you've done but without representation polymorphism.

 And we must be careful: while this is a new sword that slays many beasts,
 it doesn't slay ''all'' beasts, nor should we expect it to. Your '''Edit
 2''' looks like a beast it doesn't slay.

 Some smart design will be needed for us to learn how to wield this sword,
 and I would favor implementing this all in a library for a cycle before
 thinking about moving anything into `base`.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12708#comment:14>
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