Text.Parsec.ByteString.Lazy

Make lazy ByteStrings an instance of Stream with Char token type.

Documentation

type Parser = Parsec ByteString ()

type GenParser t st = Parsec ByteString st

parseFromFile :: Parser a -> String -> IO (Either ParseError a)

parseFromFile p filePath runs a lazy bytestring parser p on the input read from filePath using ByteString.Lazy.Char8.readFile. Returns either a ParseError (Left) or a value of type a (Right).

  main    = do{ result <- parseFromFile numbers "digits.txt"
              ; case result of
                  Left err  -> print err
                  Right xs  -> print (sum xs)
              }