{-
    Copyright 2013-2019 Mario Blazevic

    License: BSD3 (see BSD3-LICENSE.txt file)
-}

-- | 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])]

{-# LANGUAGE Haskell2010 #-}

module Data.Monoid.Instances.Stateful (
   Stateful(Stateful), extract, state, setState
   )
where

import Control.Applicative -- (Applicative(..))
import Data.Functor -- ((<$>))
import qualified Data.List as List
import Data.String (IsString(..))
import Data.Semigroup (Semigroup(..))
import Data.Monoid (Monoid(..))
import Data.Semigroup.Cancellative (LeftReductive(..), RightReductive(..))
import Data.Semigroup.Factorial (Factorial(..), StableFactorial)
import Data.Monoid.GCD (LeftGCDMonoid(..), RightGCDMonoid(..))
import Data.Monoid.Null (MonoidNull(null), PositiveMonoid)
import Data.Monoid.Factorial (FactorialMonoid(..))
import Data.Monoid.Textual (TextualMonoid(..))
import qualified Data.Semigroup.Factorial as Factorial
import qualified Data.Monoid.Factorial as Factorial
import qualified Data.Monoid.Textual as Textual

import Prelude hiding (all, any, break, elem, drop, filter, foldl, foldl1, foldr, foldr1, gcd, map, concatMap,
                       length, null, reverse, scanl, scanr, scanl1, scanr1, span, splitAt, take)

-- | @'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.
newtype Stateful a b = Stateful (b, a) deriving (Stateful a b -> Stateful a b -> Bool
(Stateful a b -> Stateful a b -> Bool)
-> (Stateful a b -> Stateful a b -> Bool) -> Eq (Stateful a b)
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
forall a b. (Eq b, Eq a) => Stateful a b -> Stateful a b -> Bool
/= :: Stateful a b -> Stateful a b -> Bool
$c/= :: forall a b. (Eq b, Eq a) => Stateful a b -> Stateful a b -> Bool
== :: Stateful a b -> Stateful a b -> Bool
$c== :: forall a b. (Eq b, Eq a) => Stateful a b -> Stateful a b -> Bool
Eq, Eq (Stateful a b)
Eq (Stateful a b)
-> (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)
-> (Stateful a b -> Stateful a b -> Stateful a b)
-> (Stateful a b -> Stateful a b -> Stateful a b)
-> Ord (Stateful a b)
Stateful a b -> Stateful a b -> Bool
Stateful a b -> Stateful a b -> Ordering
Stateful a b -> Stateful a b -> Stateful a b
forall a.
Eq a
-> (a -> a -> Ordering)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> a)
-> (a -> a -> a)
-> Ord a
forall a b. (Ord b, Ord a) => Eq (Stateful a b)
forall a b. (Ord b, Ord a) => Stateful a b -> Stateful a b -> Bool
forall a b.
(Ord b, Ord a) =>
Stateful a b -> Stateful a b -> Ordering
forall a b.
(Ord b, Ord a) =>
Stateful a b -> Stateful a b -> Stateful a b
min :: Stateful a b -> Stateful a b -> Stateful a b
$cmin :: forall a b.
(Ord b, Ord a) =>
Stateful a b -> Stateful a b -> Stateful a b
max :: Stateful a b -> Stateful a b -> Stateful a b
$cmax :: forall a b.
(Ord b, Ord a) =>
Stateful a b -> Stateful a b -> Stateful a b
>= :: Stateful a b -> Stateful a b -> Bool
$c>= :: forall a b. (Ord b, Ord a) => Stateful a b -> Stateful a b -> Bool
> :: Stateful a b -> Stateful a b -> Bool
$c> :: forall a b. (Ord b, Ord a) => Stateful a b -> Stateful a b -> Bool
<= :: Stateful a b -> Stateful a b -> Bool
$c<= :: forall a b. (Ord b, Ord a) => Stateful a b -> Stateful a b -> Bool
< :: Stateful a b -> Stateful a b -> Bool
$c< :: forall a b. (Ord b, Ord a) => Stateful a b -> Stateful a b -> Bool
compare :: Stateful a b -> Stateful a b -> Ordering
$ccompare :: forall a b.
(Ord b, Ord a) =>
Stateful a b -> Stateful a b -> Ordering
$cp1Ord :: forall a b. (Ord b, Ord a) => Eq (Stateful a b)
Ord, Int -> Stateful a b -> ShowS
[Stateful a b] -> ShowS
Stateful a b -> String
(Int -> Stateful a b -> ShowS)
-> (Stateful a b -> String)
-> ([Stateful a b] -> ShowS)
-> Show (Stateful a b)
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
forall a b. (Show b, Show a) => Int -> Stateful a b -> ShowS
forall a b. (Show b, Show a) => [Stateful a b] -> ShowS
forall a b. (Show b, Show a) => Stateful a b -> String
showList :: [Stateful a b] -> ShowS
$cshowList :: forall a b. (Show b, Show a) => [Stateful a b] -> ShowS
show :: Stateful a b -> String
$cshow :: forall a b. (Show b, Show a) => Stateful a b -> String
showsPrec :: Int -> Stateful a b -> ShowS
$cshowsPrec :: forall a b. (Show b, Show a) => Int -> Stateful a b -> ShowS
Show)

extract :: Stateful a b -> b
extract :: Stateful a b -> b
extract (Stateful (b
t, a
_)) = b
t

state :: Stateful a b -> a
state :: Stateful a b -> a
state (Stateful (b
_, a
x)) = a
x

setState :: a -> Stateful a b -> Stateful a b
setState :: a -> Stateful a b -> Stateful a b
setState a
s (Stateful (b
t, a
_)) = (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b
t, a
s)

instance Functor (Stateful a) where
   fmap :: (a -> b) -> Stateful a a -> Stateful a b
fmap a -> b
f (Stateful (a
x, a
s)) = (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (a -> b
f a
x, a
s)

instance Monoid a => Applicative (Stateful a) where
   pure :: a -> Stateful a a
pure a
m = (a, a) -> Stateful a a
forall a b. (b, a) -> Stateful a b
Stateful (a
m, a
forall a. Monoid a => a
mempty)
   Stateful (a -> b
f, a
s1) <*> :: Stateful a (a -> b) -> Stateful a a -> Stateful a b
<*> Stateful (a
x, a
s2) = (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (a -> b
f a
x, a -> a -> a
forall a. Monoid a => a -> a -> a
mappend a
s1 a
s2)

instance (Semigroup a, Semigroup b) => Semigroup (Stateful a b) where
   Stateful (b, a)
x <> :: Stateful a b -> Stateful a b -> Stateful a b
<> Stateful (b, a)
y = (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful ((b, a)
x (b, a) -> (b, a) -> (b, a)
forall a. Semigroup a => a -> a -> a
<> (b, a)
y)
   {-# INLINE (<>) #-}

instance (Monoid a, Monoid b) => Monoid (Stateful a b) where
   mempty :: Stateful a b
mempty = (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b, a)
forall a. Monoid a => a
mempty
   Stateful (b, a)
x mappend :: Stateful a b -> Stateful a b -> Stateful a b
`mappend` Stateful (b, a)
y = (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful ((b, a) -> (b, a) -> (b, a)
forall a. Monoid a => a -> a -> a
mappend (b, a)
x (b, a)
y)
   {-# INLINE mempty #-}
   {-# INLINE mappend #-}

instance (MonoidNull a, MonoidNull b) => MonoidNull (Stateful a b) where
   null :: Stateful a b -> Bool
null (Stateful (b, a)
x) = (b, a) -> Bool
forall m. MonoidNull m => m -> Bool
null (b, a)
x
   {-# INLINE null #-}

instance (PositiveMonoid a, PositiveMonoid b) => PositiveMonoid (Stateful a b)

instance (LeftReductive a, LeftReductive b) => LeftReductive (Stateful a b) where
   isPrefixOf :: Stateful a b -> Stateful a b -> Bool
isPrefixOf (Stateful (b, a)
x) (Stateful (b, a)
x') = (b, a) -> (b, a) -> Bool
forall m. LeftReductive m => m -> m -> Bool
isPrefixOf (b, a)
x (b, a)
x'
   stripPrefix :: Stateful a b -> Stateful a b -> Maybe (Stateful a b)
stripPrefix (Stateful (b, a)
x) (Stateful (b, a)
x') = (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful ((b, a) -> Stateful a b) -> Maybe (b, a) -> Maybe (Stateful a b)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> (b, a) -> (b, a) -> Maybe (b, a)
forall m. LeftReductive m => m -> m -> Maybe m
stripPrefix (b, a)
x (b, a)
x'
   {-# INLINE isPrefixOf #-}
   {-# INLINE stripPrefix #-}

instance (RightReductive a, RightReductive b) => RightReductive (Stateful a b) where
   isSuffixOf :: Stateful a b -> Stateful a b -> Bool
isSuffixOf (Stateful (b, a)
x) (Stateful (b, a)
x') = (b, a) -> (b, a) -> Bool
forall m. RightReductive m => m -> m -> Bool
isSuffixOf (b, a)
x (b, a)
x'
   stripSuffix :: Stateful a b -> Stateful a b -> Maybe (Stateful a b)
stripSuffix (Stateful (b, a)
x) (Stateful (b, a)
x') = (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful ((b, a) -> Stateful a b) -> Maybe (b, a) -> Maybe (Stateful a b)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> (b, a) -> (b, a) -> Maybe (b, a)
forall m. RightReductive m => m -> m -> Maybe m
stripSuffix (b, a)
x (b, a)
x'
   {-# INLINE stripSuffix #-}
   {-# INLINE isSuffixOf #-}

instance (LeftGCDMonoid a, LeftGCDMonoid b) => LeftGCDMonoid (Stateful a b) where
   commonPrefix :: Stateful a b -> Stateful a b -> Stateful a b
commonPrefix (Stateful (b, a)
x) (Stateful (b, a)
x') = (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful ((b, a) -> (b, a) -> (b, a)
forall m. LeftGCDMonoid m => m -> m -> m
commonPrefix (b, a)
x (b, a)
x')
   stripCommonPrefix :: Stateful a b
-> Stateful a b -> (Stateful a b, Stateful a b, Stateful a b)
stripCommonPrefix (Stateful (b, a)
x) (Stateful (b, a)
x') = ((b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b, a)
prefix, (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b, a)
suffix1, (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b, a)
suffix2)
      where ((b, a)
prefix, (b, a)
suffix1, (b, a)
suffix2) = (b, a) -> (b, a) -> ((b, a), (b, a), (b, a))
forall m. LeftGCDMonoid m => m -> m -> (m, m, m)
stripCommonPrefix (b, a)
x (b, a)
x'
   {-# INLINE commonPrefix #-}
   {-# INLINE stripCommonPrefix #-}

instance (RightGCDMonoid a, RightGCDMonoid b) => RightGCDMonoid (Stateful a b) where
   commonSuffix :: Stateful a b -> Stateful a b -> Stateful a b
commonSuffix (Stateful (b, a)
x) (Stateful (b, a)
x') = (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful ((b, a) -> (b, a) -> (b, a)
forall m. RightGCDMonoid m => m -> m -> m
commonSuffix (b, a)
x (b, a)
x')
   {-# INLINE commonSuffix #-}

instance (FactorialMonoid a, FactorialMonoid b) => Factorial (Stateful a b) where
   factors :: Stateful a b -> [Stateful a b]
factors (Stateful (b, a)
x) = ((b, a) -> Stateful a b) -> [(b, a)] -> [Stateful a b]
forall a b. (a -> b) -> [a] -> [b]
List.map (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful ((b, a) -> [(b, a)]
forall m. Factorial m => m -> [m]
factors (b, a)
x)
   length :: Stateful a b -> Int
length (Stateful (b, a)
x) = (b, a) -> Int
forall m. Factorial m => m -> Int
length (b, a)
x
   reverse :: Stateful a b -> Stateful a b
reverse (Stateful (b, a)
x) = (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful ((b, a) -> (b, a)
forall m. Factorial m => m -> m
reverse (b, a)
x)
   primePrefix :: Stateful a b -> Stateful a b
primePrefix (Stateful (b, a)
x) = (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful ((b, a) -> (b, a)
forall m. Factorial m => m -> m
primePrefix (b, a)
x)
   primeSuffix :: Stateful a b -> Stateful a b
primeSuffix (Stateful (b, a)
x) = (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful ((b, a) -> (b, a)
forall m. Factorial m => m -> m
primeSuffix (b, a)
x)
   foldl :: (a -> Stateful a b -> a) -> a -> Stateful a b -> a
foldl a -> Stateful a b -> a
f a
a0 (Stateful (b, a)
x) = (a -> (b, a) -> a) -> a -> (b, a) -> a
forall m a. Factorial m => (a -> m -> a) -> a -> m -> a
Factorial.foldl a -> (b, a) -> a
f' a
a0 (b, a)
x
      where f' :: a -> (b, a) -> a
f' a
a (b, a)
x1 = a -> Stateful a b -> a
f a
a ((b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b, a)
x1)
   foldl' :: (a -> Stateful a b -> a) -> a -> Stateful a b -> a
foldl' a -> Stateful a b -> a
f a
a0 (Stateful (b, a)
x) = (a -> (b, a) -> a) -> a -> (b, a) -> a
forall m a. Factorial m => (a -> m -> a) -> a -> m -> a
Factorial.foldl' a -> (b, a) -> a
f' a
a0 (b, a)
x
      where f' :: a -> (b, a) -> a
f' a
a (b, a)
x1 = a -> Stateful a b -> a
f a
a ((b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b, a)
x1)
   foldr :: (Stateful a b -> a -> a) -> a -> Stateful a b -> a
foldr Stateful a b -> a -> a
f a
a (Stateful (b, a)
x) = ((b, a) -> a -> a) -> a -> (b, a) -> a
forall m a. Factorial m => (m -> a -> a) -> a -> m -> a
Factorial.foldr (Stateful a b -> a -> a
f (Stateful a b -> a -> a)
-> ((b, a) -> Stateful a b) -> (b, a) -> a -> a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful) a
a (b, a)
x
   foldMap :: (Stateful a b -> n) -> Stateful a b -> n
foldMap Stateful a b -> n
f (Stateful (b, a)
x) = ((b, a) -> n) -> (b, a) -> n
forall m n. (Factorial m, Monoid n) => (m -> n) -> m -> n
Factorial.foldMap (Stateful a b -> n
f (Stateful a b -> n) -> ((b, a) -> Stateful a b) -> (b, a) -> n
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful) (b, a)
x
   {-# INLINE primePrefix #-}
   {-# INLINE primeSuffix #-}
   {-# INLINE foldl' #-}
   {-# INLINE foldr #-}
   {-# INLINE foldMap #-}
   {-# INLINE length #-}

instance (FactorialMonoid a, FactorialMonoid b) => FactorialMonoid (Stateful a b) where
   splitPrimePrefix :: Stateful a b -> Maybe (Stateful a b, Stateful a b)
splitPrimePrefix (Stateful (b, a)
x) = do ((b, a)
xp, (b, a)
xs) <- (b, a) -> Maybe ((b, a), (b, a))
forall m. FactorialMonoid m => m -> Maybe (m, m)
splitPrimePrefix (b, a)
x
                                      (Stateful a b, Stateful a b) -> Maybe (Stateful a b, Stateful a b)
forall (m :: * -> *) a. Monad m => a -> m a
return ((b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b, a)
xp, (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b, a)
xs)
   splitPrimeSuffix :: Stateful a b -> Maybe (Stateful a b, Stateful a b)
splitPrimeSuffix (Stateful (b, a)
x) = do ((b, a)
xp, (b, a)
xs) <- (b, a) -> Maybe ((b, a), (b, a))
forall m. FactorialMonoid m => m -> Maybe (m, m)
splitPrimeSuffix (b, a)
x
                                      (Stateful a b, Stateful a b) -> Maybe (Stateful a b, Stateful a b)
forall (m :: * -> *) a. Monad m => a -> m a
return ((b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b, a)
xp, (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b, a)
xs)
   span :: (Stateful a b -> Bool)
-> Stateful a b -> (Stateful a b, Stateful a b)
span Stateful a b -> Bool
p (Stateful (b, a)
x) = ((b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b, a)
xp, (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b, a)
xs)
      where ((b, a)
xp, (b, a)
xs) = ((b, a) -> Bool) -> (b, a) -> ((b, a), (b, a))
forall m. FactorialMonoid m => (m -> Bool) -> m -> (m, m)
Factorial.span (Stateful a b -> Bool
p (Stateful a b -> Bool)
-> ((b, a) -> Stateful a b) -> (b, a) -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful) (b, a)
x
   spanMaybe :: s
-> (s -> Stateful a b -> Maybe s)
-> Stateful a b
-> (Stateful a b, Stateful a b, s)
spanMaybe s
s0 s -> Stateful a b -> Maybe s
f (Stateful (b, a)
x) = ((b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b, a)
xp, (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b, a)
xs, s
s')
      where ((b, a)
xp, (b, a)
xs, s
s') = s -> (s -> (b, a) -> Maybe s) -> (b, a) -> ((b, a), (b, a), s)
forall m s.
FactorialMonoid m =>
s -> (s -> m -> Maybe s) -> m -> (m, m, s)
Factorial.spanMaybe s
s0 s -> (b, a) -> Maybe s
f' (b, a)
x
            f' :: s -> (b, a) -> Maybe s
f' s
s (b, a)
x1 = s -> Stateful a b -> Maybe s
f s
s ((b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b, a)
x1)
   spanMaybe' :: s
-> (s -> Stateful a b -> Maybe s)
-> Stateful a b
-> (Stateful a b, Stateful a b, s)
spanMaybe' s
s0 s -> Stateful a b -> Maybe s
f (Stateful (b, a)
x) = ((b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b, a)
xp, (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b, a)
xs, s
s')
      where ((b, a)
xp, (b, a)
xs, s
s') = s -> (s -> (b, a) -> Maybe s) -> (b, a) -> ((b, a), (b, a), s)
forall m s.
FactorialMonoid m =>
s -> (s -> m -> Maybe s) -> m -> (m, m, s)
Factorial.spanMaybe' s
s0 s -> (b, a) -> Maybe s
f' (b, a)
x
            f' :: s -> (b, a) -> Maybe s
f' s
s (b, a)
x1 = s -> Stateful a b -> Maybe s
f s
s ((b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b, a)
x1)
   split :: (Stateful a b -> Bool) -> Stateful a b -> [Stateful a b]
split Stateful a b -> Bool
p (Stateful (b, a)
x) = ((b, a) -> Stateful a b) -> [(b, a)] -> [Stateful a b]
forall a b. (a -> b) -> [a] -> [b]
List.map (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (((b, a) -> Bool) -> (b, a) -> [(b, a)]
forall m. FactorialMonoid m => (m -> Bool) -> m -> [m]
Factorial.split (Stateful a b -> Bool
p (Stateful a b -> Bool)
-> ((b, a) -> Stateful a b) -> (b, a) -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful) (b, a)
x)
   splitAt :: Int -> Stateful a b -> (Stateful a b, Stateful a b)
splitAt Int
n (Stateful (b, a)
x) = ((b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b, a)
xp, (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b, a)
xs)
      where ((b, a)
xp, (b, a)
xs) = Int -> (b, a) -> ((b, a), (b, a))
forall m. FactorialMonoid m => Int -> m -> (m, m)
splitAt Int
n (b, a)
x
   take :: Int -> Stateful a b -> Stateful a b
take Int
n (Stateful (b, a)
x) = (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (Int -> (b, a) -> (b, a)
forall m. FactorialMonoid m => Int -> m -> m
take Int
n (b, a)
x)
   drop :: Int -> Stateful a b -> Stateful a b
drop Int
n (Stateful (b, a)
x) = (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (Int -> (b, a) -> (b, a)
forall m. FactorialMonoid m => Int -> m -> m
drop Int
n (b, a)
x)
   {-# INLINE splitPrimePrefix #-}
   {-# INLINE splitPrimeSuffix #-}
   {-# INLINE span #-}
   {-# INLINE spanMaybe #-}
   {-# INLINE spanMaybe' #-}
   {-# INLINE splitAt #-}
   {-# INLINE take #-}
   {-# INLINE drop #-}

instance (FactorialMonoid a, FactorialMonoid b, StableFactorial a, StableFactorial b) => StableFactorial (Stateful a b)

instance (Monoid a, IsString b) => IsString (Stateful a b) where
   fromString :: String -> Stateful a b
fromString = b -> Stateful a b
forall (f :: * -> *) a. Applicative f => a -> f a
pure (b -> Stateful a b) -> (String -> b) -> String -> Stateful a b
forall b c a. (b -> c) -> (a -> b) -> a -> c
. String -> b
forall a. IsString a => String -> a
fromString

instance (LeftGCDMonoid a, FactorialMonoid a, TextualMonoid b) => TextualMonoid (Stateful a b) where
   fromText :: Text -> Stateful a b
fromText Text
t = (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (Text -> b
forall t. TextualMonoid t => Text -> t
fromText Text
t, a
forall a. Monoid a => a
mempty)
   singleton :: Char -> Stateful a b
singleton Char
c = (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (Char -> b
forall t. TextualMonoid t => Char -> t
singleton Char
c, a
forall a. Monoid a => a
mempty)

   characterPrefix :: Stateful a b -> Maybe Char
characterPrefix = b -> Maybe Char
forall t. TextualMonoid t => t -> Maybe Char
characterPrefix (b -> Maybe Char)
-> (Stateful a b -> b) -> Stateful a b -> Maybe Char
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Stateful a b -> b
forall a b. Stateful a b -> b
extract
   splitCharacterPrefix :: Stateful a b -> Maybe (Char, Stateful a b)
splitCharacterPrefix (Stateful (b
t, a
x)) = do (Char
c, b
t') <- b -> Maybe (Char, b)
forall t. TextualMonoid t => t -> Maybe (Char, t)
splitCharacterPrefix b
t
                                               (Char, Stateful a b) -> Maybe (Char, Stateful a b)
forall (m :: * -> *) a. Monad m => a -> m a
return (Char
c, (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b
t', a
x))

   map :: (Char -> Char) -> Stateful a b -> Stateful a b
map Char -> Char
f (Stateful (b
t, a
x)) = (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful ((Char -> Char) -> b -> b
forall t. TextualMonoid t => (Char -> Char) -> t -> t
Textual.map Char -> Char
f b
t, a
x)
   all :: (Char -> Bool) -> Stateful a b -> Bool
all Char -> Bool
p = (Char -> Bool) -> b -> Bool
forall t. TextualMonoid t => (Char -> Bool) -> t -> Bool
all Char -> Bool
p (b -> Bool) -> (Stateful a b -> b) -> Stateful a b -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Stateful a b -> b
forall a b. Stateful a b -> b
extract
   any :: (Char -> Bool) -> Stateful a b -> Bool
any Char -> Bool
p = (Char -> Bool) -> b -> Bool
forall t. TextualMonoid t => (Char -> Bool) -> t -> Bool
any Char -> Bool
p (b -> Bool) -> (Stateful a b -> b) -> Stateful a b -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Stateful a b -> b
forall a b. Stateful a b -> b
extract

   foldl :: (a -> Stateful a b -> a)
-> (a -> Char -> a) -> a -> Stateful a b -> a
foldl a -> Stateful a b -> a
fx a -> Char -> a
fc a
a0 (Stateful (b
t, a
x)) = (a -> a -> a) -> a -> a -> a
forall m a. Factorial m => (a -> m -> a) -> a -> m -> a
Factorial.foldl a -> a -> a
f2 ((a -> b -> a) -> (a -> Char -> a) -> a -> b -> a
forall t a.
TextualMonoid t =>
(a -> t -> a) -> (a -> Char -> a) -> a -> t -> a
Textual.foldl a -> b -> a
f1 a -> Char -> a
fc a
a0 b
t) a
x
      where f1 :: a -> b -> a
f1 a
a = a -> Stateful a b -> a
fx a
a (Stateful a b -> a) -> (b -> Stateful a b) -> b -> a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. b -> Stateful a b
forall b a. Monoid b => a -> Stateful b a
fromFst
            f2 :: a -> a -> a
f2 a
a = a -> Stateful a b -> a
fx a
a (Stateful a b -> a) -> (a -> Stateful a b) -> a -> a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. a -> Stateful a b
forall a b. Monoid a => b -> Stateful b a
fromSnd
   foldr :: (Stateful a b -> a -> a)
-> (Char -> a -> a) -> a -> Stateful a b -> a
foldr Stateful a b -> a -> a
fx Char -> a -> a
fc a
a (Stateful (b
t, a
x)) = (b -> a -> a) -> (Char -> a -> a) -> a -> b -> a
forall t a.
TextualMonoid t =>
(t -> a -> a) -> (Char -> a -> a) -> a -> t -> a
Textual.foldr (Stateful a b -> a -> a
fx (Stateful a b -> a -> a) -> (b -> Stateful a b) -> b -> a -> a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. b -> Stateful a b
forall b a. Monoid b => a -> Stateful b a
fromFst) Char -> a -> a
fc ((a -> a -> a) -> a -> a -> a
forall m a. Factorial m => (m -> a -> a) -> a -> m -> a
Factorial.foldr (Stateful a b -> a -> a
fx (Stateful a b -> a -> a) -> (a -> Stateful a b) -> a -> a -> a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. a -> Stateful a b
forall a b. Monoid a => b -> Stateful b a
fromSnd) a
a a
x) b
t
   foldl' :: (a -> Stateful a b -> a)
-> (a -> Char -> a) -> a -> Stateful a b -> a
foldl' a -> Stateful a b -> a
fx a -> Char -> a
fc a
a0 (Stateful (b
t, a
x)) = a
a' a -> a -> a
`seq` (a -> a -> a) -> a -> a -> a
forall m a. Factorial m => (a -> m -> a) -> a -> m -> a
Factorial.foldl' a -> a -> a
f2 a
a' a
x
      where a' :: a
a' = (a -> b -> a) -> (a -> Char -> a) -> a -> b -> a
forall t a.
TextualMonoid t =>
(a -> t -> a) -> (a -> Char -> a) -> a -> t -> a
Textual.foldl' a -> b -> a
f1 a -> Char -> a
fc a
a0 b
t
            f1 :: a -> b -> a
f1 a
a = a -> Stateful a b -> a
fx a
a (Stateful a b -> a) -> (b -> Stateful a b) -> b -> a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. b -> Stateful a b
forall b a. Monoid b => a -> Stateful b a
fromFst
            f2 :: a -> a -> a
f2 a
a = a -> Stateful a b -> a
fx a
a (Stateful a b -> a) -> (a -> Stateful a b) -> a -> a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. a -> Stateful a b
forall a b. Monoid a => b -> Stateful b a
fromSnd
   foldl_' :: (a -> Char -> a) -> a -> Stateful a b -> a
foldl_' a -> Char -> a
fc a
a (Stateful (b
t, a
_)) = (a -> Char -> a) -> a -> b -> a
forall t a. TextualMonoid t => (a -> Char -> a) -> a -> t -> a
foldl_' a -> Char -> a
fc a
a b
t
   foldr_ :: (Char -> a -> a) -> a -> Stateful a b -> a
foldr_ Char -> a -> a
fc a
a (Stateful (b
t, a
_)) = (Char -> a -> a) -> a -> b -> a
forall t a. TextualMonoid t => (Char -> a -> a) -> a -> t -> a
Textual.foldr_ Char -> a -> a
fc a
a b
t
   toString :: (Stateful a b -> String) -> Stateful a b -> String
toString Stateful a b -> String
fx (Stateful (b
t, a
x)) = (b -> String) -> b -> String
forall t. TextualMonoid t => (t -> String) -> t -> String
toString (Stateful a b -> String
fx (Stateful a b -> String) -> (b -> Stateful a b) -> b -> String
forall b c a. (b -> c) -> (a -> b) -> a -> c
. b -> Stateful a b
forall b a. Monoid b => a -> Stateful b a
fromFst) b
t String -> ShowS
forall a. [a] -> [a] -> [a]
++ (a -> String) -> a -> String
forall m n. (Factorial m, Monoid n) => (m -> n) -> m -> n
Factorial.foldMap (Stateful a b -> String
fx (Stateful a b -> String) -> (a -> Stateful a b) -> a -> String
forall b c a. (b -> c) -> (a -> b) -> a -> c
. a -> Stateful a b
forall a b. Monoid a => b -> Stateful b a
fromSnd) a
x

   scanl :: (Char -> Char -> Char) -> Char -> Stateful a b -> Stateful a b
scanl Char -> Char -> Char
f Char
c (Stateful (b
t, a
x)) = (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful ((Char -> Char -> Char) -> Char -> b -> b
forall t.
TextualMonoid t =>
(Char -> Char -> Char) -> Char -> t -> t
Textual.scanl Char -> Char -> Char
f Char
c b
t, a
x)
   scanl1 :: (Char -> Char -> Char) -> Stateful a b -> Stateful a b
scanl1 Char -> Char -> Char
f (Stateful (b
t, a
x)) = (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful ((Char -> Char -> Char) -> b -> b
forall t. TextualMonoid t => (Char -> Char -> Char) -> t -> t
Textual.scanl1 Char -> Char -> Char
f b
t, a
x)
   scanr :: (Char -> Char -> Char) -> Char -> Stateful a b -> Stateful a b
scanr Char -> Char -> Char
f Char
c (Stateful (b
t, a
x)) = (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful ((Char -> Char -> Char) -> Char -> b -> b
forall t.
TextualMonoid t =>
(Char -> Char -> Char) -> Char -> t -> t
Textual.scanr Char -> Char -> Char
f Char
c b
t, a
x)
   scanr1 :: (Char -> Char -> Char) -> Stateful a b -> Stateful a b
scanr1 Char -> Char -> Char
f (Stateful (b
t, a
x)) = (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful ((Char -> Char -> Char) -> b -> b
forall t. TextualMonoid t => (Char -> Char -> Char) -> t -> t
Textual.scanr1 Char -> Char -> Char
f b
t, a
x)
   mapAccumL :: (a -> Char -> (a, Char)) -> a -> Stateful a b -> (a, Stateful a b)
mapAccumL a -> Char -> (a, Char)
f a
a (Stateful (b
t, a
x)) = (a
a', (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b
t', a
x))
      where (a
a', b
t') = (a -> Char -> (a, Char)) -> a -> b -> (a, b)
forall t a.
TextualMonoid t =>
(a -> Char -> (a, Char)) -> a -> t -> (a, t)
Textual.mapAccumL a -> Char -> (a, Char)
f a
a b
t
   mapAccumR :: (a -> Char -> (a, Char)) -> a -> Stateful a b -> (a, Stateful a b)
mapAccumR a -> Char -> (a, Char)
f a
a (Stateful (b
t, a
x)) = (a
a', (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b
t', a
x))
      where (a
a', b
t') = (a -> Char -> (a, Char)) -> a -> b -> (a, b)
forall t a.
TextualMonoid t =>
(a -> Char -> (a, Char)) -> a -> t -> (a, t)
Textual.mapAccumR a -> Char -> (a, Char)
f a
a b
t

   span :: (Stateful a b -> Bool)
-> (Char -> Bool) -> Stateful a b -> (Stateful a b, Stateful a b)
span Stateful a b -> Bool
pt Char -> Bool
pc (Stateful (b
t, a
x)) = ((b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b
tp, a
xp), (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b
ts, a
xs))
      where (b
tp, b
ts) = (b -> Bool) -> (Char -> Bool) -> b -> (b, b)
forall t.
TextualMonoid t =>
(t -> Bool) -> (Char -> Bool) -> t -> (t, t)
Textual.span (Stateful a b -> Bool
pt (Stateful a b -> Bool) -> (b -> Stateful a b) -> b -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. b -> Stateful a b
forall b a. Monoid b => a -> Stateful b a
fromFst) Char -> Bool
pc b
t
            (a
xp, a
xs) | b -> Bool
forall m. MonoidNull m => m -> Bool
null b
ts = (a -> Bool) -> a -> (a, a)
forall m. FactorialMonoid m => (m -> Bool) -> m -> (m, m)
Factorial.span (Stateful a b -> Bool
pt (Stateful a b -> Bool) -> (a -> Stateful a b) -> a -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. a -> Stateful a b
forall a b. Monoid a => b -> Stateful b a
fromSnd) a
x
                     | Bool
otherwise = (a
forall a. Monoid a => a
mempty, a
x)
   span_ :: Bool
-> (Char -> Bool) -> Stateful a b -> (Stateful a b, Stateful a b)
span_ Bool
bt Char -> Bool
pc (Stateful (b
t, a
x)) = ((b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b
tp, a
xp), (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b
ts, a
xs))
      where (b
tp, b
ts) = Bool -> (Char -> Bool) -> b -> (b, b)
forall t. TextualMonoid t => Bool -> (Char -> Bool) -> t -> (t, t)
Textual.span_ Bool
bt Char -> Bool
pc b
t
            (a
xp, a
xs) | b -> Bool
forall m. MonoidNull m => m -> Bool
null b
ts Bool -> Bool -> Bool
&& Bool
bt = (a
x, a
forall a. Monoid a => a
mempty)
                     | Bool
otherwise = (a
forall a. Monoid a => a
mempty, a
x)
   break :: (Stateful a b -> Bool)
-> (Char -> Bool) -> Stateful a b -> (Stateful a b, Stateful a b)
break Stateful a b -> Bool
pt Char -> Bool
pc (Stateful (b
t, a
x)) = ((b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b
tp, a
xp), (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b
ts, a
xs))
      where (b
tp, b
ts) = (b -> Bool) -> (Char -> Bool) -> b -> (b, b)
forall t.
TextualMonoid t =>
(t -> Bool) -> (Char -> Bool) -> t -> (t, t)
Textual.break (Stateful a b -> Bool
pt (Stateful a b -> Bool) -> (b -> Stateful a b) -> b -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. b -> Stateful a b
forall b a. Monoid b => a -> Stateful b a
fromFst) Char -> Bool
pc b
t
            (a
xp, a
xs) | b -> Bool
forall m. MonoidNull m => m -> Bool
null b
ts = (a -> Bool) -> a -> (a, a)
forall m. FactorialMonoid m => (m -> Bool) -> m -> (m, m)
Factorial.break (Stateful a b -> Bool
pt (Stateful a b -> Bool) -> (a -> Stateful a b) -> a -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. a -> Stateful a b
forall a b. Monoid a => b -> Stateful b a
fromSnd) a
x
                     | Bool
otherwise = (a
forall a. Monoid a => a
mempty, a
x)
   spanMaybe :: s
-> (s -> Stateful a b -> Maybe s)
-> (s -> Char -> Maybe s)
-> Stateful a b
-> (Stateful a b, Stateful a b, s)
spanMaybe s
s0 s -> Stateful a b -> Maybe s
ft s -> Char -> Maybe s
fc (Stateful (b
t, a
x)) = ((b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b
tp, a
xp), (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b
ts, a
xs), s
s'')
      where (b
tp, b
ts, s
s') = s
-> (s -> b -> Maybe s) -> (s -> Char -> Maybe s) -> b -> (b, b, s)
forall t s.
TextualMonoid t =>
s
-> (s -> t -> Maybe s) -> (s -> Char -> Maybe s) -> t -> (t, t, s)
Textual.spanMaybe s
s0 s -> b -> Maybe s
ft' s -> Char -> Maybe s
fc b
t
            (a
xp, a
xs, s
s'') | b -> Bool
forall m. MonoidNull m => m -> Bool
null b
ts = s -> (s -> a -> Maybe s) -> a -> (a, a, s)
forall m s.
FactorialMonoid m =>
s -> (s -> m -> Maybe s) -> m -> (m, m, s)
Factorial.spanMaybe s
s' s -> a -> Maybe s
ft'' a
x
                          | Bool
otherwise = (a
forall a. Monoid a => a
mempty, a
x, s
s')
            ft' :: s -> b -> Maybe s
ft' s
s b
t1 = s -> Stateful a b -> Maybe s
ft s
s ((b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b
t1, a
forall a. Monoid a => a
mempty))
            ft'' :: s -> a -> Maybe s
ft'' s
s a
x1 = s -> Stateful a b -> Maybe s
ft s
s ((b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b
forall a. Monoid a => a
mempty, a
x1))
   spanMaybe' :: s
-> (s -> Stateful a b -> Maybe s)
-> (s -> Char -> Maybe s)
-> Stateful a b
-> (Stateful a b, Stateful a b, s)
spanMaybe' s
s0 s -> Stateful a b -> Maybe s
ft s -> Char -> Maybe s
fc (Stateful (b
t, a
x)) = ((b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b
tp, a
xp), (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b
ts, a
xs), s
s'')
      where (b
tp, b
ts, s
s') = s
-> (s -> b -> Maybe s) -> (s -> Char -> Maybe s) -> b -> (b, b, s)
forall t s.
TextualMonoid t =>
s
-> (s -> t -> Maybe s) -> (s -> Char -> Maybe s) -> t -> (t, t, s)
Textual.spanMaybe' s
s0 s -> b -> Maybe s
ft' s -> Char -> Maybe s
fc b
t
            (a
xp, a
xs, s
s'') | b -> Bool
forall m. MonoidNull m => m -> Bool
null b
ts = s -> (s -> a -> Maybe s) -> a -> (a, a, s)
forall m s.
FactorialMonoid m =>
s -> (s -> m -> Maybe s) -> m -> (m, m, s)
Factorial.spanMaybe' s
s' s -> a -> Maybe s
ft'' a
x
                          | Bool
otherwise = (a
forall a. Monoid a => a
mempty, a
x, s
s')
            ft' :: s -> b -> Maybe s
ft' s
s b
t1 = s -> Stateful a b -> Maybe s
ft s
s ((b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b
t1, a
forall a. Monoid a => a
mempty))
            ft'' :: s -> a -> Maybe s
ft'' s
s a
x1 = s -> Stateful a b -> Maybe s
ft s
s ((b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b
forall a. Monoid a => a
mempty, a
x1))
   spanMaybe_' :: s
-> (s -> Char -> Maybe s)
-> Stateful a b
-> (Stateful a b, Stateful a b, s)
spanMaybe_' s
s0 s -> Char -> Maybe s
fc (Stateful (b
t, a
x)) = ((b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b
tp, a
xp), (b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b
ts, a
xs), s
s')
      where (b
tp, b
ts, s
s') = s -> (s -> Char -> Maybe s) -> b -> (b, b, s)
forall t s.
TextualMonoid t =>
s -> (s -> Char -> Maybe s) -> t -> (t, t, s)
Textual.spanMaybe_' s
s0 s -> Char -> Maybe s
fc b
t
            (a
xp, a
xs) | b -> Bool
forall m. MonoidNull m => m -> Bool
null b
ts = (a
x, a
forall a. Monoid a => a
mempty)
                     | Bool
otherwise = (a
forall a. Monoid a => a
mempty, a
x)
   split :: (Char -> Bool) -> Stateful a b -> [Stateful a b]
split Char -> Bool
p (Stateful (b
t, a
x)) = ([Stateful a b] -> [Stateful a b]) -> [b] -> [Stateful a b]
forall b c. ([Stateful a b] -> c) -> [b] -> c
restore [Stateful a b] -> [Stateful a b]
forall a. a -> a
id [b]
ts
      where ts :: [b]
ts = (Char -> Bool) -> b -> [b]
forall t. TextualMonoid t => (Char -> Bool) -> t -> [t]
Textual.split Char -> Bool
p b
t
            restore :: ([Stateful a b] -> c) -> [b] -> c
restore [Stateful a b] -> c
f [b
t1] = [Stateful a b] -> c
f [(b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b
t1, a
x)]
            restore [Stateful a b] -> c
f ~(b
hd:[b]
tl) = ([Stateful a b] -> c) -> [b] -> c
restore ([Stateful a b] -> c
f ([Stateful a b] -> c)
-> ([Stateful a b] -> [Stateful a b]) -> [Stateful a b] -> c
forall b c a. (b -> c) -> (a -> b) -> a -> c
. ((b, a) -> Stateful a b
forall a b. (b, a) -> Stateful a b
Stateful (b
hd, a
forall a. Monoid a => a
mempty)Stateful a b -> [Stateful a b] -> [Stateful a b]
forall a. a -> [a] -> [a]
:)) [b]
tl
   find :: (Char -> Bool) -> Stateful a b -> Maybe Char
find Char -> Bool
p = (Char -> Bool) -> b -> Maybe Char
forall t. TextualMonoid t => (Char -> Bool) -> t -> Maybe Char
find Char -> Bool
p (b -> Maybe Char)
-> (Stateful a b -> b) -> Stateful a b -> Maybe Char
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Stateful a b -> b
forall a b. Stateful a b -> b
extract
   elem :: Char -> Stateful a b -> Bool
elem Char
c = Char -> b -> Bool
forall t. TextualMonoid t => Char -> t -> Bool
elem Char
c (b -> Bool) -> (Stateful a b -> b) -> Stateful a b -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Stateful a b -> b
forall a b. Stateful a b -> b
extract

   {-# INLINE characterPrefix #-}
   {-# INLINE splitCharacterPrefix #-}
   {-# INLINE map #-}
   {-# INLINE foldl' #-}
   {-# INLINE foldr #-}
   {-# INLINE spanMaybe' #-}
   {-# INLINE span #-}
   {-# INLINE spanMaybe_' #-}
   {-# INLINE span_ #-}
   {-# INLINE any #-}
   {-# INLINE all #-}
   {-# INLINE split #-}
   {-# INLINE find #-}
   {-# INLINE elem #-}

{-# INLINE fromFst #-}
fromFst :: Monoid b => a -> Stateful b a
fromFst :: a -> Stateful b a
fromFst a
a = (a, b) -> Stateful b a
forall a b. (b, a) -> Stateful a b
Stateful (a
a, b
forall a. Monoid a => a
mempty)

{-# INLINE fromSnd #-}
fromSnd :: Monoid a => b -> Stateful b a
fromSnd :: b -> Stateful b a
fromSnd b
b = (a, b) -> Stateful b a
forall a b. (b, a) -> Stateful a b
Stateful (a
forall a. Monoid a => a
mempty, b
b)