>Double already has +Inf and -Inf; it's just that Haskell doesn't have
>(AFAIK) syntax to write them as constants.
In the source for the GHC libraries it uses 1/0 for +Infinity
and -1/0 for -Infinity, so I assume these are the "official" way to do it.
Personally I would define nicer names:
positiveInfinity :: Double
positiveInfinity = 1/0
negativeInfinity :: Double
negativeInfinity = -1/0
Keean.
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