Hi, I've got a problem with parser primitives using Hugs. I have the standard code to define parsers for digits etc sat :: (Char -> Bool) -> Parser Char sat p = do x <- item if p x then return x else failure digit :: Parser Char digit = sat isDigit but when I try to run it I get the error Undefined variable "isDigit" It does the same for any of the isXXXX predicates. I´m completely flummoxed, so any help would be greatly appreciated. :( Thanks, Nik Dr Nik Freydís Whitehead University of Akureyri, Iceland ********************************************************************* Having the moral high ground is good. Having the moral high ground and an FGMP-15 is better. *********************************************************************