Text.Parsec.String

Make Strings an instance of Stream with Char token type.

Documentation

type Parser = Parsec String ()

type GenParser tok st = Parsec [tok] st

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

parseFromFile p filePath runs a string parser p on the input read from filePath using 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)
              }