On 10/10/07, Dan Weston <[EMAIL PROTECTED]> wrote: > Actually, it is a constant: piDecimalExpansion :: String.
Where is this constant defined? > A translation from piDecimalExpansion :: String to pi :: Floating a => a > is already well defined via read :: Read a => String -> a > > Any definition of pi in the Floating class that differs from (read > piDecimalExpansion) is erroneous. I propose the above as the default > definition of pi. piDecimalExpansion, if defined, would be an infinite length string. The expression read $ "0." ++ repeat '1' :: Double is Bottom. So even if you had piDecimalExpansion, it isn't clear how to use that to define pi. _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
