parsec-3.1.0: Monadic parser combinatorsSource codeContentsIndex
Text.Parsec.String
Portabilityportable
Stabilityprovisional
Maintainerderek.a.elkins@gmail.com
Description
Make Strings an instance of Stream with Char token type.
Synopsis
type Parser = Parsec String ()
type GenParser tok st = Parsec [tok] st
parseFromFile :: Parser a -> String -> IO (Either ParseError a)
Documentation
type Parser = Parsec String ()Source
type GenParser tok st = Parsec [tok] stSource
parseFromFile :: Parser a -> String -> IO (Either ParseError a)Source

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)
              }
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