I'm trying to do a simple lex analyser in haskell I defined the function lexi that is intended to break a string into tokens returning them as a list but I received the following error: ERROR "TesteEval.hs":20 - Syntax error in input (unexpected symbol "restante") isLetter:: Char -> Bool isLetter c = or [isLower (c), isUpper (c)] isLetterorDigit:: Char -> Bool isLetterorDigit c = or [isLetter (c), isDigit (c)] main = lexi lexi " "= [] lexi (a:x) | isLetter a = token: lexi restante where S = takeWhile isLetterorDigit x line 20 ------> restante = dropWhile isLetterorDigit x token = 'Id' ++ S _________________________________________________________________ Chat with friends online, try MSN Messenger: http://messenger.msn.com