It's hard to say exactly, but assuming you have your file new line delimited and you have a function signature like

moveParser :: String -> YOUR_TYPE

you can try something like this:

main = do

handle <- openFile "test.txt"

contents <- hGetContents handle

processedLines <- return (fmap moveParser $ lines contents)

hClose handle

Does this help?

Dennis

On Sat, May 16, 2015 at 3:58 PM, Mike Houghton <mike_k_houghton@yahoo.co.uk> wrote:

Hi,

I’me writing a simple parser and can test it in GHCI

parseTest moveParser "(1,2)->(3,3)”

and I get what I expect i.e.
Move {from = Location 1 2, to = Location 3 3}

I now have a text file (test.txt) with lots of (1,2)->(3,3) (3,6)->(3,9) etc etc and
I really can’t see how I get the contents of the text file into the parser!!

I have
main = do
handle <- openFile "test.txt" ReadMode
contents <- hGetContents handle
!! what goes here!!! - how do I invoke moveParser with contents ??

Thanks

Mike

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