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GHC 9.10.3 · lts/ghc-9.10.x · 248f8f0 · 2026-10-05

Moduleparsec-3.1.18.0Haskell2010

Text.Parsec.ByteString.Lazy

Convenience definitions for working with lazy ByteStrings.

  • 2 types
  • 1 value
  • Packageparsec-3.1.18.0
  • Exports3
  • LanguageHaskell2010
  • LicenceBSD-2-Clause
  • SourceLazy.hs

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)
             }