Andrew Coppin
Wait... "unexpected end of input; expecting [...] end of input [...]"
That's just *wrong*...! ;-)
But don't despaire - show us your parser and what it's supposed to parse, and I'm sure somebody [maybe even me] will be able to tell you what's up.
This is what I came up with while simplifying the parser: import Text.Parsec identifier = do whiteSpace s <- many1 letter whiteSpace return s whiteSpace = do eof <|> ((many $ choice [ char ' ', newline ]) >> return ()) main = do let syn = runParser (do char '\\' many1 identifier char ':' whiteSpace identifier whiteSpace ) () "" "\\a b" print syn Admittedly, this is a quite degenerate case crouching in at least 10 corners simultaneously. Anyway, I get % ./test Left (line 1, column 5): unexpected end of input expecting end of input, letter or ":" and if I change it to whiteSpace = do (many eof >> return ()) <|> ((many $ choice [ char ' ', newline ]) >> return ()) Left (line 1, column 3): unexpected " " expecting letter, end of input or ":" Please, please don't ask me for the rationale of using eof like this, you would get the same answer as if you'd ask me why I cast a stone into the sea. -- (c) this sig last receiving data processing entity. Inspect headers for past copyright information. All rights reserved. Unauthorised copying, hiring, renting, public performance and/or broadcasting of this signature prohibited.