Which wrapper are you using? I just recently did this for the monad wrapper. It looks a little like this: data Token = EOF | .... alexEOF = return EOF lexAll :: Alex [Token] lexAll = do x <- alexMonadScan case x of EOF -> [] _ -> lexAll >>= return . (:) x lexString :: String -> [Token] lexString str = runAlex str lexAll The basic and posn wrappers have the "alexScanTokens" function which does essentially the same thing. Just slap on hGetContents and show and you're done. Creighton Hogg wrote:
Hi, I've read through the documentation on Alex abit, but since I'm not the sharpest tool in the shed I'm not really seeing the obvious way to take the output file of Alex and make a program that will print out the list of tokens scanned from an input file. I had to do something like this this past week for a class, but that was in Java so I wanted to try it in Haskell as well but I'm stuck at the moment. _______________________________________________ Haskell mailing list Haskell@haskell.org http://www.haskell.org/mailman/listinfo/haskell