[GHC] #13211: NegativeLiterals -0.0 :: Double

[GHC]

#13211: NegativeLiterals -0.0 :: Double
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        Reporter:  rwbarton          |                Owner:  Nolan
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.1
      Resolution:                    |             Keywords:  newcomer
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 rwbarton):

 I see.

 I guess we could continue to parse `-0b0` and `-0.0` as single lexemes,
 but record that they have the form of negative zero. Then convert them to
 `negate (fromInteger 0)` or `negate (fromRational 0)` during desugaring.
 However when I took a quick look earlier that didn't look particularly
 convenient to do.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13211#comment:9>
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