Safe Haskell	Safe
Language	Haskell2010

Data.Monoid.Instances.Stateful

Description

This module defines the monoid transformer data type Stateful.

> let s = setState [4] $ pure "data" :: Stateful [Int] String
> s
Stateful ("data",[4])
> factors s
[Stateful ("d",[]),Stateful ("a",[]),Stateful ("t",[]),Stateful ("a",[]),Stateful ("",[4])]

Synopsis

newtype Stateful a b = Stateful (b, a)
extract :: Stateful a b -> b
state :: Stateful a b -> a
setState :: a -> Stateful a b -> Stateful a b

Documentation

newtype Stateful a b Source #

Stateful a b is a wrapper around the Monoid b that carries the state a along. The state type a must be a monoid as well if Stateful is to be of any use. In the FactorialMonoid and TextualMonoid class instances, the monoid b has the priority and the state a is left for the end.

Constructors

Stateful (b, a)

Instances

Functor (Stateful a) Source #
Instance details Defined in Data.Monoid.Instances.Stateful Methods fmap :: (a0 -> b) -> Stateful a a0 -> Stateful a b # (<$) :: a0 -> Stateful a b -> Stateful a a0 #
Monoid a => Applicative (Stateful a) Source #
Instance details Defined in Data.Monoid.Instances.Stateful Methods pure :: a0 -> Stateful a a0 # (<>) :: Stateful a (a0 -> b) -> Stateful a a0 -> Stateful a b # liftA2 :: (a0 -> b -> c) -> Stateful a a0 -> Stateful a b -> Stateful a c # (>) :: Stateful a a0 -> Stateful a b -> Stateful a b # (<*) :: Stateful a a0 -> Stateful a b -> Stateful a a0 #
(Eq b, Eq a) => Eq (Stateful a b) Source #
Instance details Defined in Data.Monoid.Instances.Stateful Methods (==) :: Stateful a b -> Stateful a b -> Bool # (/=) :: Stateful a b -> Stateful a b -> Bool #
(Ord b, Ord a) => Ord (Stateful a b) Source #
Instance details Defined in Data.Monoid.Instances.Stateful Methods compare :: Stateful a b -> Stateful a b -> Ordering # (<) :: Stateful a b -> Stateful a b -> Bool # (<=) :: Stateful a b -> Stateful a b -> Bool # (>) :: Stateful a b -> Stateful a b -> Bool # (>=) :: Stateful a b -> Stateful a b -> Bool # max :: Stateful a b -> Stateful a b -> Stateful a b # min :: Stateful a b -> Stateful a b -> Stateful a b #
(Show b, Show a) => Show (Stateful a b) Source #
Instance details Defined in Data.Monoid.Instances.Stateful Methods showsPrec :: Int -> Stateful a b -> ShowS # show :: Stateful a b -> String # showList :: [Stateful a b] -> ShowS #
(Monoid a, IsString b) => IsString (Stateful a b) Source #
Instance details Defined in Data.Monoid.Instances.Stateful Methods fromString :: String -> Stateful a b #
(Semigroup a, Semigroup b) => Semigroup (Stateful a b) Source #
Instance details Defined in Data.Monoid.Instances.Stateful Methods (<>) :: Stateful a b -> Stateful a b -> Stateful a b # sconcat :: NonEmpty (Stateful a b) -> Stateful a b # stimes :: Integral b0 => b0 -> Stateful a b -> Stateful a b #
(Monoid a, Monoid b) => Monoid (Stateful a b) Source #
Instance details Defined in Data.Monoid.Instances.Stateful Methods mempty :: Stateful a b # mappend :: Stateful a b -> Stateful a b -> Stateful a b # mconcat :: [Stateful a b] -> Stateful a b #
(PositiveMonoid a, PositiveMonoid b) => PositiveMonoid (Stateful a b) Source #
Instance details Defined in Data.Monoid.Instances.Stateful
(MonoidNull a, MonoidNull b) => MonoidNull (Stateful a b) Source #
Instance details Defined in Data.Monoid.Instances.Stateful Methods null :: Stateful a b -> Bool Source #
(RightReductive a, RightReductive b) => RightReductive (Stateful a b) Source #
Instance details Defined in Data.Monoid.Instances.Stateful Methods isSuffixOf :: Stateful a b -> Stateful a b -> Bool Source # stripSuffix :: Stateful a b -> Stateful a b -> Maybe (Stateful a b) Source #
(LeftReductive a, LeftReductive b) => LeftReductive (Stateful a b) Source #
Instance details Defined in Data.Monoid.Instances.Stateful Methods isPrefixOf :: Stateful a b -> Stateful a b -> Bool Source # stripPrefix :: Stateful a b -> Stateful a b -> Maybe (Stateful a b) Source #
(RightGCDMonoid a, RightGCDMonoid b) => RightGCDMonoid (Stateful a b) Source #
Instance details Defined in Data.Monoid.Instances.Stateful Methods commonSuffix :: Stateful a b -> Stateful a b -> Stateful a b Source # stripCommonSuffix :: Stateful a b -> Stateful a b -> (Stateful a b, Stateful a b, Stateful a b) Source #
(LeftGCDMonoid a, LeftGCDMonoid b) => LeftGCDMonoid (Stateful a b) Source #
Instance details Defined in Data.Monoid.Instances.Stateful Methods commonPrefix :: Stateful a b -> Stateful a b -> Stateful a b Source # stripCommonPrefix :: Stateful a b -> Stateful a b -> (Stateful a b, Stateful a b, Stateful a b) Source #
(FactorialMonoid a, FactorialMonoid b, StableFactorial a, StableFactorial b) => StableFactorial (Stateful a b) Source #
Instance details Defined in Data.Monoid.Instances.Stateful
(FactorialMonoid a, FactorialMonoid b) => Factorial (Stateful a b) Source #
Instance details Defined in Data.Monoid.Instances.Stateful Methods factors :: Stateful a b -> [Stateful a b] Source # primePrefix :: Stateful a b -> Stateful a b Source # primeSuffix :: Stateful a b -> Stateful a b Source # foldl :: (a0 -> Stateful a b -> a0) -> a0 -> Stateful a b -> a0 Source # foldl' :: (a0 -> Stateful a b -> a0) -> a0 -> Stateful a b -> a0 Source # foldr :: (Stateful a b -> a0 -> a0) -> a0 -> Stateful a b -> a0 Source # length :: Stateful a b -> Int Source # foldMap :: Monoid n => (Stateful a b -> n) -> Stateful a b -> n Source # reverse :: Stateful a b -> Stateful a b Source #
(FactorialMonoid a, FactorialMonoid b) => FactorialMonoid (Stateful a b) Source #
Instance details Defined in Data.Monoid.Instances.Stateful Methods splitPrimePrefix :: Stateful a b -> Maybe (Stateful a b, Stateful a b) Source # splitPrimeSuffix :: Stateful a b -> Maybe (Stateful a b, Stateful a b) Source # inits :: Stateful a b -> [Stateful a b] Source # tails :: Stateful a b -> [Stateful a b] Source # span :: (Stateful a b -> Bool) -> Stateful a b -> (Stateful a b, Stateful a b) Source # break :: (Stateful a b -> Bool) -> Stateful a b -> (Stateful a b, Stateful a b) Source # split :: (Stateful a b -> Bool) -> Stateful a b -> [Stateful a b] Source # takeWhile :: (Stateful a b -> Bool) -> Stateful a b -> Stateful a b Source # dropWhile :: (Stateful a b -> Bool) -> Stateful a b -> Stateful a b Source # spanMaybe :: s -> (s -> Stateful a b -> Maybe s) -> Stateful a b -> (Stateful a b, Stateful a b, s) Source # spanMaybe' :: s -> (s -> Stateful a b -> Maybe s) -> Stateful a b -> (Stateful a b, Stateful a b, s) Source # splitAt :: Int -> Stateful a b -> (Stateful a b, Stateful a b) Source # drop :: Int -> Stateful a b -> Stateful a b Source # take :: Int -> Stateful a b -> Stateful a b Source #
(LeftGCDMonoid a, FactorialMonoid a, TextualMonoid b) => TextualMonoid (Stateful a b) Source #
Instance details Defined in Data.Monoid.Instances.Stateful Methods fromText :: Text -> Stateful a b Source # singleton :: Char -> Stateful a b Source # splitCharacterPrefix :: Stateful a b -> Maybe (Char, Stateful a b) Source # characterPrefix :: Stateful a b -> Maybe Char Source # map :: (Char -> Char) -> Stateful a b -> Stateful a b Source # concatMap :: (Char -> Stateful a b) -> Stateful a b -> Stateful a b Source # toString :: (Stateful a b -> String) -> Stateful a b -> String Source # any :: (Char -> Bool) -> Stateful a b -> Bool Source # all :: (Char -> Bool) -> Stateful a b -> Bool Source # foldl :: (a0 -> Stateful a b -> a0) -> (a0 -> Char -> a0) -> a0 -> Stateful a b -> a0 Source # foldl' :: (a0 -> Stateful a b -> a0) -> (a0 -> Char -> a0) -> a0 -> Stateful a b -> a0 Source # foldr :: (Stateful a b -> a0 -> a0) -> (Char -> a0 -> a0) -> a0 -> Stateful a b -> a0 Source # scanl :: (Char -> Char -> Char) -> Char -> Stateful a b -> Stateful a b Source # scanl1 :: (Char -> Char -> Char) -> Stateful a b -> Stateful a b Source # scanr :: (Char -> Char -> Char) -> Char -> Stateful a b -> Stateful a b Source # scanr1 :: (Char -> Char -> Char) -> Stateful a b -> Stateful a b Source # mapAccumL :: (a0 -> Char -> (a0, Char)) -> a0 -> Stateful a b -> (a0, Stateful a b) Source # mapAccumR :: (a0 -> Char -> (a0, Char)) -> a0 -> Stateful a b -> (a0, Stateful a b) Source # takeWhile :: (Stateful a b -> Bool) -> (Char -> Bool) -> Stateful a b -> Stateful a b Source # dropWhile :: (Stateful a b -> Bool) -> (Char -> Bool) -> Stateful a b -> Stateful a b Source # break :: (Stateful a b -> Bool) -> (Char -> Bool) -> Stateful a b -> (Stateful a b, Stateful a b) Source # span :: (Stateful a b -> Bool) -> (Char -> Bool) -> Stateful a b -> (Stateful a b, Stateful a b) Source # spanMaybe :: s -> (s -> Stateful a b -> Maybe s) -> (s -> Char -> Maybe s) -> Stateful a b -> (Stateful a b, Stateful a b, s) Source # spanMaybe' :: s -> (s -> Stateful a b -> Maybe s) -> (s -> Char -> Maybe s) -> Stateful a b -> (Stateful a b, Stateful a b, s) Source # split :: (Char -> Bool) -> Stateful a b -> [Stateful a b] Source # find :: (Char -> Bool) -> Stateful a b -> Maybe Char Source # elem :: Char -> Stateful a b -> Bool Source # foldl_ :: (a0 -> Char -> a0) -> a0 -> Stateful a b -> a0 Source # foldl_' :: (a0 -> Char -> a0) -> a0 -> Stateful a b -> a0 Source # foldr_ :: (Char -> a0 -> a0) -> a0 -> Stateful a b -> a0 Source # takeWhile_ :: Bool -> (Char -> Bool) -> Stateful a b -> Stateful a b Source # dropWhile_ :: Bool -> (Char -> Bool) -> Stateful a b -> Stateful a b Source # break_ :: Bool -> (Char -> Bool) -> Stateful a b -> (Stateful a b, Stateful a b) Source # span_ :: Bool -> (Char -> Bool) -> Stateful a b -> (Stateful a b, Stateful a b) Source # spanMaybe_ :: s -> (s -> Char -> Maybe s) -> Stateful a b -> (Stateful a b, Stateful a b, s) Source # spanMaybe_' :: s -> (s -> Char -> Maybe s) -> Stateful a b -> (Stateful a b, Stateful a b, s) Source #

extract :: Stateful a b -> b Source #

state :: Stateful a b -> a Source #

setState :: a -> Stateful a b -> Stateful a b Source #