úÎ*\'!   None !"&)246=BMT PContains information about what went wrong during an unsuccessful options parse. Contains (error-message) (begin-args-index) (end-args-index)(A monad transformer for parsing options.An option keyword, such as "--help"mNB: In the future, this will become a proper data type that contains a list of aliases and help descriptions.;The callback to be called for a successfully parsed option.UThis function (or value) can have any arity and ultimately returns a value with type Monad m => m ()2Each of the callback's arguments must have a type t which implements  and  .2Think of this as the following constraint synonym: etype OptionCallback m f = (Monad m, f ~ (Parseable t*, Typeable t*) => t0 -> t1 -> ... -> tN -> m ())Example callbacks: äputStrLn "Option parsed!" :: IO () put :: String -> State String () \n -> liftIO (print n) :: (MonadIO m) => Int -> m () \name year ratio -> lift (print (name, year, ratio)) :: (MonadTrans m) => String -> Int -> Float -> m IO ()1Class describing parseable values. Much like the   class.%Given a sequence of strings, returns  L and the number of strings consumed if the parse failed. Otherwise, return š the parsed value and the number of strings consumed. Element-wise, an entire string must be parsed in the sequence to be considered a successful parse.A simple wrapper over [a]*. Used to avoid overlapping instances for  Parseable [a] and Parseable String ~Tries to parse the supplied options against input arguments. If successful, parsed option callbacks are executed. Otherwise none of the callbacks are executed.Example: žoptions :: Options IO () options = do addOption "--help" $ do putStrLn "--user NAME [AGE]" addOption "--user" $ name -> do putStrLn $ Name:D ++ name addOption "--user" $ name age -> do putStrLn $ Name:Þ ++ name ++ " Age:" ++ show (age :: Int) main :: IO () main = do args <- getArgs mError <- runOptions options args case mError of Just (ParseFailed _ _ _) -> exitFailure Nothing -> exitSuccess  Adds the supplied option to the  Options m () context.“If the keyword is matched and the types of the callback's parameters can successfully be parsed, the callback is called with the parsed arguments.; !"#$%&'()* +, -./0123456789:;<=>    ( !"#$%&'()* +, -./0123456789:;<=>?        !"#$%&&'()*+,-./0123456789:;<=>?@lambda-options-0.2.0.0Text.LambdaOptions OptionsError ParseFailedOptionsKeywordOptionCallback ParseableparseList runOptions addOptionbaseData.Typeable.InternalTypeableGHC.ReadRead Data.MaybeNothingJust OptionsStatestateOpaqueParsersstateOptionsByAritystateCollectedActions stateCurrMark stateHighMark stateArgs unOptions OptionInfo optionKeywordoptionTypeRepsoptionCallback WrapCallbackwrapGetOpaqueParsersgetOpaqueParsers OpaqueParserOpaqueCallbackOpaque internalError simpleParse parseOpaque mkParseFailedmkParseFailed' runOptions' addByArityfirstM' tryParseAlltryParsetryParseByAritytryParseByOptionstryParseByOption matchKeywordsequenceParsers$fMonadTransOptions$fWrapCallbackm(->)$fWrapCallbackmm$fGetOpaqueParsersm$fGetOpaqueParsers(->)$fParseableList$fParseableMaybe$fParseableFloat $fParseable[]$fParseableInt