Îõ³h&1t0B1      !"#$%&'()*+,-./0„(c) 2014 Chris Allen (c) 2014 Edward Kmett (c) 2018-2023 Kowainik (c) 2023 Marco Zocca, UnfoldML BSD-3-Clauseoss@unfoldml.comStablePortable Safe-Inferred6;=?ã0(validation-microØ is a sum type for storing either all validation failures or validation success. Unlike 1&, which returns only the first error, " accumulates all errors using the 2 typeclass.Usually type variables in  e a are used as follows:eÉ: is a list or set of failure messages or values of some error data type.a<: is some domain type denoting successful validation result.Some typical use-cases:  [3] UserEither list of 33 error messages or a validated value of a custom User type.  (4 UserValidationError) UserŸSimilar to previous example, but list of failures guaranteed to be non-empty in case of validation failure, and it stores values of some custom error type.validation-microValidation failure. The e# type is supposed to implement the 2 instance.validation-micro%Successful validation result of type a.validation-micro#NB Validation is not a monad thoughvalidation-micro CombinatorsÃWe are providing several functions for better integration with the 1 related code in this section. Transform a  into an 1.$validationToEither (Success "whoop") Right "whoop"#validationToEither (Failure "nahh") Left "nahh"validation-micro Transform an 1 into a ."eitherToValidation (Right "whoop")Success "whoop" eitherToValidation (Left "nahh")Failure "nahh"validation-microPredicate on if the given  is .isFailure (Failure 'e')TrueisFailure (Success 'a')Falsevalidation-microPredicate on if the given  is .isSuccess (Success 'a')TrueisSuccess (Failure 'e')Falsevalidation-micro"Transforms the value of the given  into x- using provided functions that can transform  and , value into the resulting type respectively. " world!") (show . (* 10))myValidation (Success 100)"1000"myValidation (Failure "Hello")"Hello world!" validation-microFilters out all  values into the new list of es from the given list of s.!Note that the order is preserved.Ïfailures [Failure "Hello", Success 1, Failure "world", Success 2, Failure "!" ]["Hello","world","!"] validation-microFilters out all  values into the new list of as from the given list of s.!Note that the order is preserved.Ðsuccesses [Failure "Hello", Success 1, Failure "world", Success 2, Failure "!" ][1,2] validation-micro Redistributes the given list of s into two lists of es and e/s, where the first list contains all values of s and the second one ”@ es correspondingly.!Note that the order is preserved.ÛpartitionValidations [Failure "Hello", Success 1, Failure "world", Success 2, Failure "!" ](["Hello","world","!"],[1,2]) validation-microReturns the contents of a $-value or a default value otherwise.)fromFailure "default" (Failure "failure") "failure"!fromFailure "default" (Success 1) "default" validation-microReturns the contents of a $-value or a default value otherwise.fromSuccess 42 (Success 1)1"fromSuccess 42 (Failure "failure")42validation-micro Create a  of 4 list with a single given error.failure "I am a failure" Failure ("I am a failure" :| [])validation-micro Returns a # in case of the given predicate is 5 . Returns  () otherwise.&let shouldFail = (==) "I am a failure"7failureIf (shouldFail "I am a failure") "I told you so"Failure ("I told you so" :| [])2failureIf (shouldFail "I am NOT a failure") "okay" Success ()validation-micro Returns a  unless the given predicate is 5 . Returns  ()' in case of the predicate is satisfied. Similar to  with the reversed predicate.  p áD  (not p) &let shouldFail = (==) "I am a failure" let validatePassword = Î [ validateEmptyPassword , validateShortPassword ] >  "VeryStrongPassword"  "VeryStrongPassword" >  "" $ (EmptyPassword :| [ShortPassword]) validation-microApplies the given action to  if it is $ and returns the result. In case of  the default value is returned.7whenFailure "bar" (Failure 42) (\a -> "foo" <$ print a)42"foo"7whenFailure "bar" (Success 42) (\a -> "foo" <$ print a)"bar"validation-microApplies given action to the  content if it is . Similar to  but the default value is ()."whenFailure_ (Success 42) putStrLn%whenFailure_ (Failure "foo") putStrLnfoovalidation-microMonadic version of &. Applies monadic action to the given  in case of 3. Returns the resulting value, or provided default.?whenFailureM "bar" (pure $ Failure 42) (\a -> "foo" <$ print a)42"foo"?whenFailureM "bar" (pure $ Success 42) (\a -> "foo" <$ print a)"bar"validation-microMonadic version of &. Applies monadic action to the given  in case of  . Similar to  but the default is ().*whenFailureM_ (pure $ Success 42) putStrLn-whenFailureM_ (pure $ Failure "foo") putStrLnfoovalidation-microApplies the given action to  if it is $ and returns the result. In case of  the default value is returned.?whenSuccess "bar" (Failure "foo") (\a -> "success!" <$ print a)"bar" "success!" <$ print a)42 "success!"validation-microApplies given action to the  content if it is . Similar to  but the default value is ()."whenSuccess_ (Failure "foo") printwhenSuccess_ (Success 42) print42validation-microMonadic version of &. Applies monadic action to the given  in case of 3. Returns the resulting value, or provided default.ÇwhenSuccessM "bar" (pure $ Failure "foo") (\a -> "success!" <$ print a)"bar"ÄwhenSuccessM "bar" (pure $ Success 42) (\a -> "success!" <$ print a)42 "success!"validation-microMonadic version of &. Applies monadic action to the given  in case of  . Similar to  but the default is ().*whenSuccessM_ (pure $ Failure "foo") print'whenSuccessM_ (pure $ Success 42) print42validation-microMaps  of  to 7.failureToMaybe (Failure True) Just TruefailureToMaybe (Success "aba")Nothingvalidation-microMaps  of  to 7.successToMaybe (Failure True)NothingsuccessToMaybe (Success "aba") Just "aba"validation-microMaps 7 to  In case of 8' it wraps the given default value into . maybeToFailure True (Just "aba") Failure "aba"maybeToFailure True Nothing Success Truevalidation-microMaps 7 to  . In case of 8' it wraps the given default value into  maybeToSuccess True (Just "aba") Success "aba"maybeToSuccess True Nothing Failure Truevalidation-micro Similar to 9 but traverses both  and # with given effectful computations.Examples+parseInt = readMaybe :: String -> Maybe Int.bitraverse listToMaybe parseInt (Success "42")Just (Success 42)/bitraverse listToMaybe parseInt (Success "int")Nothing.bitraverse listToMaybe parseInt (Failure [15])Just (Failure 15),bitraverse listToMaybe parseInt (Failure [])Nothing validation-micro Similar to 6 but allows folding both  and 9 to the same monoidal value according to given functions.Examples one x = [x]&bifoldMap id (one . show) (Success 15)["15"]5bifoldMap id (one . show) (Failure ["Wrong", "Fail"])["Wrong","Fail"]!validation-micro Similar to :* but allows mapping of values inside both  and .Examplesbimap length show (Success 50) Success "50"'bimap length show (Failure ["15", "9"]) Failure 2"validation-microTraverse values inside ! with some effectful computation.Examples+parseInt = readMaybe :: String -> Maybe Int traverse parseInt (Success "42")Just (Success 42)!traverse parseInt (Success "int")Nothing"traverse parseInt (Failure ["42"])Just (Failure ["42"])#validation-micro6 for  allows folding values inside .Examplesfold (Success [16])[16]2fold (Failure "WRONG!" :: Validation String [Int])[]$validation-micro6This instance implements the behaviour when the first  is returned. Otherwise all s are combined.Examples3success1 = Success [9] :: Validation [String] [Int]4success2 = Success [15] :: Validation [String] [Int]9failure1 = Failure ["WRONG"] :: Validation [String] [Int]9failure2 = Failure ["FAIL"] :: Validation [String] [Int]success1 <|> success2 Success [9]failure1 <|> failure2Failure ["WRONG","FAIL"]failure2 <|> success2 Success [15]%validation-micro5This instance is the most important instance for the ¬ data type. It's responsible for the many implementations. And it allows to accumulate errors while performing validation or combining the results in the applicative style.Examples/success1 = Success 9 :: Validation [String] Int0success2 = Success 15 :: Validation [String] Int Int)7failure1 = Failure ["WRONG"] :: Validation [String] Int7failure2 = Failure ["FAIL"] :: Validation [String] IntsuccessF <*> success1 Success 18successF <*> failure1Failure ["WRONG"](+) <$> success1 <*> success2 Success 24(+) <$> failure1 <*> failure2Failure ["WRONG","FAIL"]liftA2 (+) success1 failure1Failure ["WRONG"]&liftA3 (,,) failure1 success1 failure2Failure ["WRONG","FAIL"]ìImplementations of all functions are lazy and they correctly work if some arguments are not fully evaluated.failure1 *> failure2Failure ["WRONG","FAIL"] isFailure $ failure1 *> failure2TrueÃepicFail = error "Impossible validation" :: Validation [String] Int isFailure $ failure1 *> epicFailTrue&validation-micro; ::  e a is Success which stores ; :: a to be consistent with the 2 instance.Examples"mempty :: Validation String [Bool] Success []'validation-micro2 allows merging multiple 2s into single one by combining values inside both  and . The < operator merges two s following the below rules: If both values are s, returns a new  with accumulated errors.If both values are ful, returns a new  with combined success using 2 for values inside .If one value is  and another one is , then  is returned.Examples3success1 = Success [9] :: Validation [String] [Int]4success2 = Success [15] :: Validation [String] [Int]9failure1 = Failure ["WRONG"] :: Validation [String] [Int]9failure2 = Failure ["FAIL"] :: Validation [String] [Int]success1 <> success2Success [9,15]failure1 <> failure2Failure ["WRONG","FAIL"]success1 <> failure1Failure ["WRONG"],failure2 <> success1 <> success2 <> failure1Failure ["FAIL","WRONG"](validation-micro!Allows changing the value inside  with a given function.Examplesfmap (+1) (Success 9) Success 10fmap (+1) (Failure ["wrong"])Failure ["wrong"]  =      !"#$%&'()*+,-./012345367368369:;<3=>3?@3?A3BC36D36E36FÇ.validation-micro-0.1.0.0-dJWQv7FrEHK8XlS8NSuXwValidation.Micro ValidationFailureSuccessbindValidationvalidationToEithereitherToValidation isFailure isSuccess validationfailures successespartitionValidations fromFailure fromSuccessfailure failureIf failureUnless validateAll whenFailure whenFailure_ whenFailureM whenFailureM_ whenSuccess whenSuccess_ whenSuccessM whenSuccessM_failureToMaybesuccessToMaybemaybeToFailuremaybeToSuccess$fNFData2Validation$fBitraversableValidation$fBifoldableValidation$fBifunctorValidation$fTraversableValidation$fFoldableValidation$fAlternativeValidation$fApplicativeValidation$fMonoidValidation$fSemigroupValidation$fFunctorValidation$fEqValidation$fOrdValidation$fShowValidation$fGenericValidation$fGeneric1TYPEValidation$fDataValidation$fNFDataValidation$fNFData1Validationbase Data.EitherEitherGHC.Base SemigroupStringNonEmptyghc-prim GHC.TypesTrue Data.FoldableFoldable GHC.MaybeJustNothingData.Traversable TraversableFunctormempty<>