parsec-3.1.3: Monadic parser combinators

Portabilityportable
Stabilityprovisional
Maintainer[email protected]
Safe HaskellSafe-Inferred

Text.Parsec.String

Description

Make Strings an instance of Stream with Char token type.

Synopsis

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)
              }