On Feb 11, 2008 10:18 PM, Uwe Hollerbach <[EMAIL PROTECTED]> wrote: > If I fire up ghci, import > Data.Ratio and GHC.Real, and then ask about the type of "infinity", it > tells me Rational, which as far as I can tell is Ratio Integer...?
Yes, Rational is Ratio Integer. It might not be a good idea to import GHC.Real, since it doesn't seem to be documented at http://www.haskell.org/ghc/docs/latest/html/libraries/. If you just import Data.Ratio, and define > pinf :: Integer > pinf = 1 % 0 > ninf :: Integer > ninf = (-1) % 0 Then things fail the way you expect (basically, Data.Ratio isn't written to support infinity). But it's really odd the way the infinity from GHC.Real works. Anyone have an explanation? -- I'm doing Science and I'm still alive. _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
