On Fri, Jun 17, 2011 at 12:00 PM, Dmitri O.Kondratiev
Hi, I try to parse csv file with Text.CSV, like this:
import Text.CSV import System
main = do [inpFileName] <- getArgs putStrLn ("Parsing "++inpFileName++"...") let result = parseCSVFromFile inpFileName print result
=== As a result I get:
No instance for (Show (IO (Either Text.Parsec.Error.ParseError CSV))) arising from a use of `print' Possible fix: add an instance declaration for (Show (IO (Either Text.Parsec.Error.ParseError CSV)))
=== Question: How to add a Show instance for "(IO (Either Text.Parsec.Error.ParseError CSV)))" ?
Thanks!
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I think what you want is:
main = do [inpFileName] <- getArgs putStrLn ("Parsing "++inpFileName++"...") result <- parseCSVFromFile inpFileName print result
Michael