You forgot to process the tail part of the scanned string. Do something with the tl binding in the scan function. Note that the scan function returns Token and not [Token]. On Mon, 2011-10-17 at 20:17 -0600, kolli kolli wrote:
I am new to haskell plz dnt mind
scan :: [Char] -> Token scan ('i':'f':tl) = IfKeyword scan ('t':'h':'e':'n':tl) = ThenKeyword scanp :: [Char] -> [Token] scanp t = sequence (map scan t)
when I call scan on my file which has "if then" then its just printing if as IfKeyword ..its nt talking the then word
I tried using sequence but its nt working..Can you please help me out..
I have to get the output as a list of tokens
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