Copyright | (c) Paolo Martini 2007 |
---|---|
License | BSD-style (see the file libraries/parsec/LICENSE) |
Maintainer | derek.a.elkins@gmail.com |
Stability | provisional |
Portability | portable |
Safe Haskell | Safe |
Language | Haskell2010 |
Text.Parsec.String
Documentation
parseFromFile :: Parser a -> FilePath -> 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) }