2008/12/13 Nathan Bloomfield <nblo...@gmail.com>: > I want to be able to parse a string of digits to a type level numeral as > described in the Number parameterized types paper.
Hi, I'm at UA too (bsl04). Here's a quick try. Sorry if I'm not getting what you're doing. import Text.Parsec import Text.Parsec.String data PeanoNumber = Zero | Succ PeanoNumber deriving Show parseP :: Parser PeanoNumber parseP = do char '1' rest <- parseP return $ Succ rest <|> return Zero test = parseTest parseP "111" _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
