base-4.10.1.0: Basic libraries

Data.Semigroup

Description

In mathematics, a semigroup is an algebraic structure consisting of a set together with an associative binary operation. A semigroup generalizes a monoid in that there might not exist an identity element. It also (originally) generalized a group (a monoid with all inverses) to a type where every element did not have to have an inverse, thus the name semigroup.

The use of (<>) in this module conflicts with an operator with the same name that is being exported by Data.Monoid. However, this package re-exports (most of) the contents of Data.Monoid, so to use semigroups and monoids in the same package just

import Data.Semigroup

Since: 4.9.0.0

Synopsis

# Documentation

class Semigroup a where Source #

The class of semigroups (types with an associative binary operation).

Since: 4.9.0.0

Methods

(<>) :: a -> a -> a infixr 6 Source #

An associative operation.

(a <> b) <> c = a <> (b <> c)


If a is also a Monoid we further require

(<>) = mappend


(<>) :: Monoid a => a -> a -> a infixr 6 Source #

An associative operation.

(a <> b) <> c = a <> (b <> c)


If a is also a Monoid we further require

(<>) = mappend


sconcat :: NonEmpty a -> a Source #

Reduce a non-empty list with <>

The default definition should be sufficient, but this can be overridden for efficiency.

stimes :: Integral b => b -> a -> a Source #

Repeat a value n times.

Given that this works on a Semigroup it is allowed to fail if you request 0 or fewer repetitions, and the default definition will do so.

By making this a member of the class, idempotent semigroups and monoids can upgrade this to execute in O(1) by picking stimes = stimesIdempotent or stimes = stimesIdempotentMonoid respectively.

Instances

 # Since: 4.9.0.0 Methodsstimes :: Integral b => b -> Ordering -> Ordering Source # # Since: 4.9.0.0 Methods(<>) :: () -> () -> () Source #sconcat :: NonEmpty () -> () Source #stimes :: Integral b => b -> () -> () Source # # Since: 4.9.0.0 Methods(<>) :: Any -> Any -> Any Source #stimes :: Integral b => b -> Any -> Any Source # # Since: 4.9.0.0 Methods(<>) :: All -> All -> All Source #stimes :: Integral b => b -> All -> All Source # # Since: 4.10.0.0 Methodsstimes :: Integral b => b -> Lifetime -> Lifetime Source # # Since: 4.10.0.0 Methodsstimes :: Integral b => b -> Event -> Event Source # # Since: 4.9.0.0 Methods(<>) :: Void -> Void -> Void Source #stimes :: Integral b => b -> Void -> Void Source # Semigroup [a] # Since: 4.9.0.0 Methods(<>) :: [a] -> [a] -> [a] Source #sconcat :: NonEmpty [a] -> [a] Source #stimes :: Integral b => b -> [a] -> [a] Source # Semigroup a => Semigroup (Maybe a) # Since: 4.9.0.0 Methods(<>) :: Maybe a -> Maybe a -> Maybe a Source #sconcat :: NonEmpty (Maybe a) -> Maybe a Source #stimes :: Integral b => b -> Maybe a -> Maybe a Source # Semigroup a => Semigroup (IO a) # Since: 4.10.0.0 Methods(<>) :: IO a -> IO a -> IO a Source #sconcat :: NonEmpty (IO a) -> IO a Source #stimes :: Integral b => b -> IO a -> IO a Source # # Since: 4.9.0.0 Methods(<>) :: Last a -> Last a -> Last a Source #sconcat :: NonEmpty (Last a) -> Last a Source #stimes :: Integral b => b -> Last a -> Last a Source # # Since: 4.9.0.0 Methods(<>) :: First a -> First a -> First a Source #sconcat :: NonEmpty (First a) -> First a Source #stimes :: Integral b => b -> First a -> First a Source # Num a => Semigroup (Product a) # Since: 4.9.0.0 Methods(<>) :: Product a -> Product a -> Product a Source #sconcat :: NonEmpty (Product a) -> Product a Source #stimes :: Integral b => b -> Product a -> Product a Source # Num a => Semigroup (Sum a) # Since: 4.9.0.0 Methods(<>) :: Sum a -> Sum a -> Sum a Source #sconcat :: NonEmpty (Sum a) -> Sum a Source #stimes :: Integral b => b -> Sum a -> Sum a Source # # Since: 4.9.0.0 Methods(<>) :: Endo a -> Endo a -> Endo a Source #sconcat :: NonEmpty (Endo a) -> Endo a Source #stimes :: Integral b => b -> Endo a -> Endo a Source # Semigroup a => Semigroup (Dual a) # Since: 4.9.0.0 Methods(<>) :: Dual a -> Dual a -> Dual a Source #sconcat :: NonEmpty (Dual a) -> Dual a Source #stimes :: Integral b => b -> Dual a -> Dual a Source # Semigroup a => Semigroup (Identity a) # Since: 4.9.0.0 Methods(<>) :: Identity a -> Identity a -> Identity a Source #stimes :: Integral b => b -> Identity a -> Identity a Source # # Since: 4.9.0.0 Methods(<>) :: NonEmpty a -> NonEmpty a -> NonEmpty a Source #stimes :: Integral b => b -> NonEmpty a -> NonEmpty a Source # Semigroup a => Semigroup (Option a) # Since: 4.9.0.0 Methods(<>) :: Option a -> Option a -> Option a Source #sconcat :: NonEmpty (Option a) -> Option a Source #stimes :: Integral b => b -> Option a -> Option a Source # Monoid m => Semigroup (WrappedMonoid m) # Since: 4.9.0.0 Methodsstimes :: Integral b => b -> WrappedMonoid m -> WrappedMonoid m Source # # Since: 4.9.0.0 Methods(<>) :: Last a -> Last a -> Last a Source #sconcat :: NonEmpty (Last a) -> Last a Source #stimes :: Integral b => b -> Last a -> Last a Source # # Since: 4.9.0.0 Methods(<>) :: First a -> First a -> First a Source #sconcat :: NonEmpty (First a) -> First a Source #stimes :: Integral b => b -> First a -> First a Source # Ord a => Semigroup (Max a) # Since: 4.9.0.0 Methods(<>) :: Max a -> Max a -> Max a Source #sconcat :: NonEmpty (Max a) -> Max a Source #stimes :: Integral b => b -> Max a -> Max a Source # Ord a => Semigroup (Min a) # Since: 4.9.0.0 Methods(<>) :: Min a -> Min a -> Min a Source #sconcat :: NonEmpty (Min a) -> Min a Source #stimes :: Integral b => b -> Min a -> Min a Source # Semigroup b => Semigroup (a -> b) # Since: 4.9.0.0 Methods(<>) :: (a -> b) -> (a -> b) -> a -> b Source #sconcat :: NonEmpty (a -> b) -> a -> b Source #stimes :: Integral b => b -> (a -> b) -> a -> b Source # Semigroup (Either a b) # Since: 4.9.0.0 Methods(<>) :: Either a b -> Either a b -> Either a b Source #sconcat :: NonEmpty (Either a b) -> Either a b Source #stimes :: Integral b => b -> Either a b -> Either a b Source # (Semigroup a, Semigroup b) => Semigroup (a, b) # Since: 4.9.0.0 Methods(<>) :: (a, b) -> (a, b) -> (a, b) Source #sconcat :: NonEmpty (a, b) -> (a, b) Source #stimes :: Integral b => b -> (a, b) -> (a, b) Source # Semigroup (Proxy k s) # Since: 4.9.0.0 Methods(<>) :: Proxy k s -> Proxy k s -> Proxy k s Source #sconcat :: NonEmpty (Proxy k s) -> Proxy k s Source #stimes :: Integral b => b -> Proxy k s -> Proxy k s Source # (Semigroup a, Semigroup b, Semigroup c) => Semigroup (a, b, c) # Since: 4.9.0.0 Methods(<>) :: (a, b, c) -> (a, b, c) -> (a, b, c) Source #sconcat :: NonEmpty (a, b, c) -> (a, b, c) Source #stimes :: Integral b => b -> (a, b, c) -> (a, b, c) Source # Alternative f => Semigroup (Alt * f a) # Since: 4.9.0.0 Methods(<>) :: Alt * f a -> Alt * f a -> Alt * f a Source #sconcat :: NonEmpty (Alt * f a) -> Alt * f a Source #stimes :: Integral b => b -> Alt * f a -> Alt * f a Source # Semigroup a => Semigroup (Const k a b) # Since: 4.9.0.0 Methods(<>) :: Const k a b -> Const k a b -> Const k a b Source #sconcat :: NonEmpty (Const k a b) -> Const k a b Source #stimes :: Integral b => b -> Const k a b -> Const k a b Source # (Semigroup a, Semigroup b, Semigroup c, Semigroup d) => Semigroup (a, b, c, d) # Since: 4.9.0.0 Methods(<>) :: (a, b, c, d) -> (a, b, c, d) -> (a, b, c, d) Source #sconcat :: NonEmpty (a, b, c, d) -> (a, b, c, d) Source #stimes :: Integral b => b -> (a, b, c, d) -> (a, b, c, d) Source # (Semigroup a, Semigroup b, Semigroup c, Semigroup d, Semigroup e) => Semigroup (a, b, c, d, e) # Since: 4.9.0.0 Methods(<>) :: (a, b, c, d, e) -> (a, b, c, d, e) -> (a, b, c, d, e) Source #sconcat :: NonEmpty (a, b, c, d, e) -> (a, b, c, d, e) Source #stimes :: Integral b => b -> (a, b, c, d, e) -> (a, b, c, d, e) Source #

stimesMonoid :: (Integral b, Monoid a) => b -> a -> a Source #

This is a valid definition of stimes for a Monoid.

Unlike the default definition of stimes, it is defined for 0 and so it should be preferred where possible.

stimesIdempotent :: Integral b => b -> a -> a Source #

This is a valid definition of stimes for an idempotent Semigroup.

When x <> x = x, this definition should be preferred, because it works in O(1) rather than O(log n).

stimesIdempotentMonoid :: (Integral b, Monoid a) => b -> a -> a Source #

This is a valid definition of stimes for an idempotent Monoid.

When mappend x x = x, this definition should be preferred, because it works in O(1) rather than O(log n)

mtimesDefault :: (Integral b, Monoid a) => b -> a -> a Source #

Repeat a value n times.

mtimesDefault n a = a <> a <> ... <> a  -- using <> (n-1) times

Implemented using stimes and mempty.

This is a suitable definition for an mtimes member of Monoid.

# Semigroups

newtype Min a Source #

Constructors

 Min FieldsgetMin :: a

Instances

 # Since: 4.9.0.0 Methods(>>=) :: Min a -> (a -> Min b) -> Min b Source #(>>) :: Min a -> Min b -> Min b Source #return :: a -> Min a Source #fail :: String -> Min a Source # # Since: 4.9.0.0 Methodsfmap :: (a -> b) -> Min a -> Min b Source #(<$) :: a -> Min b -> Min a Source # # Since: 4.9.0.0 Methodsmfix :: (a -> Min a) -> Min a Source # # Since: 4.9.0.0 Methodspure :: a -> Min a Source #(<*>) :: Min (a -> b) -> Min a -> Min b Source #liftA2 :: (a -> b -> c) -> Min a -> Min b -> Min c Source #(*>) :: Min a -> Min b -> Min b Source #(<*) :: Min a -> Min b -> Min a Source # # Since: 4.9.0.0 Methodsfold :: Monoid m => Min m -> m Source #foldMap :: Monoid m => (a -> m) -> Min a -> m Source #foldr :: (a -> b -> b) -> b -> Min a -> b Source #foldr' :: (a -> b -> b) -> b -> Min a -> b Source #foldl :: (b -> a -> b) -> b -> Min a -> b Source #foldl' :: (b -> a -> b) -> b -> Min a -> b Source #foldr1 :: (a -> a -> a) -> Min a -> a Source #foldl1 :: (a -> a -> a) -> Min a -> a Source #toList :: Min a -> [a] Source #null :: Min a -> Bool Source #length :: Min a -> Int Source #elem :: Eq a => a -> Min a -> Bool Source #maximum :: Ord a => Min a -> a Source #minimum :: Ord a => Min a -> a Source #sum :: Num a => Min a -> a Source #product :: Num a => Min a -> a Source # # Since: 4.9.0.0 Methodstraverse :: Applicative f => (a -> f b) -> Min a -> f (Min b) Source #sequenceA :: Applicative f => Min (f a) -> f (Min a) Source #mapM :: Monad m => (a -> m b) -> Min a -> m (Min b) Source #sequence :: Monad m => Min (m a) -> m (Min a) Source # Bounded a => Bounded (Min a) # Methods Enum a => Enum (Min a) # Since: 4.9.0.0 Methodssucc :: Min a -> Min a Source #pred :: Min a -> Min a Source #toEnum :: Int -> Min a Source #fromEnum :: Min a -> Int Source #enumFrom :: Min a -> [Min a] Source #enumFromThen :: Min a -> Min a -> [Min a] Source #enumFromTo :: Min a -> Min a -> [Min a] Source #enumFromThenTo :: Min a -> Min a -> Min a -> [Min a] Source # Eq a => Eq (Min a) # Methods(==) :: Min a -> Min a -> Bool Source #(/=) :: Min a -> Min a -> Bool Source # Data a => Data (Min a) # Methodsgfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Min a -> c (Min a) Source #gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Min a) Source #toConstr :: Min a -> Constr Source #dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c (Min a)) Source #dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Min a)) Source #gmapT :: (forall b. Data b => b -> b) -> Min a -> Min a Source #gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Min a -> r Source #gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Min a -> r Source #gmapQ :: (forall d. Data d => d -> u) -> Min a -> [u] Source #gmapQi :: Int -> (forall d. Data d => d -> u) -> Min a -> u Source #gmapM :: Monad m => (forall d. Data d => d -> m d) -> Min a -> m (Min a) Source #gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Min a -> m (Min a) Source #gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Min a -> m (Min a) Source # Num a => Num (Min a) # Since: 4.9.0.0 Methods(+) :: Min a -> Min a -> Min a Source #(-) :: Min a -> Min a -> Min a Source #(*) :: Min a -> Min a -> Min a Source #negate :: Min a -> Min a Source #abs :: Min a -> Min a Source #signum :: Min a -> Min a Source # Ord a => Ord (Min a) # Methodscompare :: Min a -> Min a -> Ordering Source #(<) :: Min a -> Min a -> Bool Source #(<=) :: Min a -> Min a -> Bool Source #(>) :: Min a -> Min a -> Bool Source #(>=) :: Min a -> Min a -> Bool Source #max :: Min a -> Min a -> Min a Source #min :: Min a -> Min a -> Min a Source # Read a => Read (Min a) # MethodsreadsPrec :: Int -> ReadS (Min a) Source # Show a => Show (Min a) # MethodsshowsPrec :: Int -> Min a -> ShowS Source #show :: Min a -> String Source #showList :: [Min a] -> ShowS Source # Generic (Min a) # Associated Typestype Rep (Min a) :: * -> * Source # Methodsfrom :: Min a -> Rep (Min a) x Source #to :: Rep (Min a) x -> Min a Source # Ord a => Semigroup (Min a) # Since: 4.9.0.0 Methods(<>) :: Min a -> Min a -> Min a Source #sconcat :: NonEmpty (Min a) -> Min a Source #stimes :: Integral b => b -> Min a -> Min a Source # (Ord a, Bounded a) => Monoid (Min a) # Since: 4.9.0.0 Methodsmappend :: Min a -> Min a -> Min a Source #mconcat :: [Min a] -> Min a Source # # Associated Typestype Rep1 Min (f :: Min -> *) :: k -> * Source # Methodsfrom1 :: f a -> Rep1 Min f a Source #to1 :: Rep1 Min f a -> f a Source # type Rep (Min a) # type Rep (Min a) = D1 * (MetaData "Min" "Data.Semigroup" "base" True) (C1 * (MetaCons "Min" PrefixI True) (S1 * (MetaSel (Just Symbol "getMin") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 * a))) type Rep1 * Min # type Rep1 * Min = D1 * (MetaData "Min" "Data.Semigroup" "base" True) (C1 * (MetaCons "Min" PrefixI True) (S1 * (MetaSel (Just Symbol "getMin") NoSourceUnpackedness NoSourceStrictness DecidedLazy) Par1)) newtype Max a Source # Constructors  Max FieldsgetMax :: a Instances  # Since: 4.9.0.0 Methods(>>=) :: Max a -> (a -> Max b) -> Max b Source #(>>) :: Max a -> Max b -> Max b Source #return :: a -> Max a Source #fail :: String -> Max a Source # # Since: 4.9.0.0 Methodsfmap :: (a -> b) -> Max a -> Max b Source #(<$) :: a -> Max b -> Max a Source # # Since: 4.9.0.0 Methodsmfix :: (a -> Max a) -> Max a Source # # Since: 4.9.0.0 Methodspure :: a -> Max a Source #(<*>) :: Max (a -> b) -> Max a -> Max b Source #liftA2 :: (a -> b -> c) -> Max a -> Max b -> Max c Source #(*>) :: Max a -> Max b -> Max b Source #(<*) :: Max a -> Max b -> Max a Source # # Since: 4.9.0.0 Methodsfold :: Monoid m => Max m -> m Source #foldMap :: Monoid m => (a -> m) -> Max a -> m Source #foldr :: (a -> b -> b) -> b -> Max a -> b Source #foldr' :: (a -> b -> b) -> b -> Max a -> b Source #foldl :: (b -> a -> b) -> b -> Max a -> b Source #foldl' :: (b -> a -> b) -> b -> Max a -> b Source #foldr1 :: (a -> a -> a) -> Max a -> a Source #foldl1 :: (a -> a -> a) -> Max a -> a Source #toList :: Max a -> [a] Source #null :: Max a -> Bool Source #length :: Max a -> Int Source #elem :: Eq a => a -> Max a -> Bool Source #maximum :: Ord a => Max a -> a Source #minimum :: Ord a => Max a -> a Source #sum :: Num a => Max a -> a Source #product :: Num a => Max a -> a Source # # Since: 4.9.0.0 Methodstraverse :: Applicative f => (a -> f b) -> Max a -> f (Max b) Source #sequenceA :: Applicative f => Max (f a) -> f (Max a) Source #mapM :: Monad m => (a -> m b) -> Max a -> m (Max b) Source #sequence :: Monad m => Max (m a) -> m (Max a) Source # Bounded a => Bounded (Max a) # Methods Enum a => Enum (Max a) # Since: 4.9.0.0 Methodssucc :: Max a -> Max a Source #pred :: Max a -> Max a Source #toEnum :: Int -> Max a Source #fromEnum :: Max a -> Int Source #enumFrom :: Max a -> [Max a] Source #enumFromThen :: Max a -> Max a -> [Max a] Source #enumFromTo :: Max a -> Max a -> [Max a] Source #enumFromThenTo :: Max a -> Max a -> Max a -> [Max a] Source # Eq a => Eq (Max a) # Methods(==) :: Max a -> Max a -> Bool Source #(/=) :: Max a -> Max a -> Bool Source # Data a => Data (Max a) # Methodsgfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Max a -> c (Max a) Source #gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Max a) Source #toConstr :: Max a -> Constr Source #dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c (Max a)) Source #dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Max a)) Source #gmapT :: (forall b. Data b => b -> b) -> Max a -> Max a Source #gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Max a -> r Source #gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Max a -> r Source #gmapQ :: (forall d. Data d => d -> u) -> Max a -> [u] Source #gmapQi :: Int -> (forall d. Data d => d -> u) -> Max a -> u Source #gmapM :: Monad m => (forall d. Data d => d -> m d) -> Max a -> m (Max a) Source #gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Max a -> m (Max a) Source #gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Max a -> m (Max a) Source # Num a => Num (Max a) # Since: 4.9.0.0 Methods(+) :: Max a -> Max a -> Max a Source #(-) :: Max a -> Max a -> Max a Source #(*) :: Max a -> Max a -> Max a Source #negate :: Max a -> Max a Source #abs :: Max a -> Max a Source #signum :: Max a -> Max a Source # Ord a => Ord (Max a) # Methodscompare :: Max a -> Max a -> Ordering Source #(<) :: Max a -> Max a -> Bool Source #(<=) :: Max a -> Max a -> Bool Source #(>) :: Max a -> Max a -> Bool Source #(>=) :: Max a -> Max a -> Bool Source #max :: Max a -> Max a -> Max a Source #min :: Max a -> Max a -> Max a Source # Read a => Read (Max a) # MethodsreadsPrec :: Int -> ReadS (Max a) Source # Show a => Show (Max a) # MethodsshowsPrec :: Int -> Max a -> ShowS Source #show :: Max a -> String Source #showList :: [Max a] -> ShowS Source # Generic (Max a) # Associated Typestype Rep (Max a) :: * -> * Source # Methodsfrom :: Max a -> Rep (Max a) x Source #to :: Rep (Max a) x -> Max a Source # Ord a => Semigroup (Max a) # Since: 4.9.0.0 Methods(<>) :: Max a -> Max a -> Max a Source #sconcat :: NonEmpty (Max a) -> Max a Source #stimes :: Integral b => b -> Max a -> Max a Source # (Ord a, Bounded a) => Monoid (Max a) # Since: 4.9.0.0 Methodsmappend :: Max a -> Max a -> Max a Source #mconcat :: [Max a] -> Max a Source # # Associated Typestype Rep1 Max (f :: Max -> *) :: k -> * Source # Methodsfrom1 :: f a -> Rep1 Max f a Source #to1 :: Rep1 Max f a -> f a Source # type Rep (Max a) # type Rep (Max a) = D1 * (MetaData "Max" "Data.Semigroup" "base" True) (C1 * (MetaCons "Max" PrefixI True) (S1 * (MetaSel (Just Symbol "getMax") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 * a))) type Rep1 * Max # type Rep1 * Max = D1 * (MetaData "Max" "Data.Semigroup" "base" True) (C1 * (MetaCons "Max" PrefixI True) (S1 * (MetaSel (Just Symbol "getMax") NoSourceUnpackedness NoSourceStrictness DecidedLazy) Par1))

newtype First a Source #

Use Option (First a) to get the behavior of First from Data.Monoid.

Constructors

 First FieldsgetFirst :: a

Instances

 # Since: 4.9.0.0 Methods(>>=) :: First a -> (a -> First b) -> First b Source #(>>) :: First a -> First b -> First b Source #return :: a -> First a Source # # Since: 4.9.0.0 Methodsfmap :: (a -> b) -> First a -> First b Source #(<$) :: a -> First b -> First a Source # # Since: 4.9.0.0 Methodsmfix :: (a -> First a) -> First a Source # # Since: 4.9.0.0 Methodspure :: a -> First a Source #(<*>) :: First (a -> b) -> First a -> First b Source #liftA2 :: (a -> b -> c) -> First a -> First b -> First c Source #(*>) :: First a -> First b -> First b Source #(<*) :: First a -> First b -> First a Source # # Since: 4.9.0.0 Methodsfold :: Monoid m => First m -> m Source #foldMap :: Monoid m => (a -> m) -> First a -> m Source #foldr :: (a -> b -> b) -> b -> First a -> b Source #foldr' :: (a -> b -> b) -> b -> First a -> b Source #foldl :: (b -> a -> b) -> b -> First a -> b Source #foldl' :: (b -> a -> b) -> b -> First a -> b Source #foldr1 :: (a -> a -> a) -> First a -> a Source #foldl1 :: (a -> a -> a) -> First a -> a Source #toList :: First a -> [a] Source #null :: First a -> Bool Source #length :: First a -> Int Source #elem :: Eq a => a -> First a -> Bool Source #maximum :: Ord a => First a -> a Source #minimum :: Ord a => First a -> a Source #sum :: Num a => First a -> a Source #product :: Num a => First a -> a Source # # Since: 4.9.0.0 Methodstraverse :: Applicative f => (a -> f b) -> First a -> f (First b) Source #sequenceA :: Applicative f => First (f a) -> f (First a) Source #mapM :: Monad m => (a -> m b) -> First a -> m (First b) Source #sequence :: Monad m => First (m a) -> m (First a) Source # Bounded a => Bounded (First a) # Methods Enum a => Enum (First a) # Since: 4.9.0.0 Methodssucc :: First a -> First a Source #pred :: First a -> First a Source #fromEnum :: First a -> Int Source #enumFrom :: First a -> [First a] Source #enumFromThen :: First a -> First a -> [First a] Source #enumFromTo :: First a -> First a -> [First a] Source #enumFromThenTo :: First a -> First a -> First a -> [First a] Source # Eq a => Eq (First a) # Methods(==) :: First a -> First a -> Bool Source #(/=) :: First a -> First a -> Bool Source # Data a => Data (First a) # Methodsgfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> First a -> c (First a) Source #gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (First a) Source #dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c (First a)) Source #dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (First a)) Source #gmapT :: (forall b. Data b => b -> b) -> First a -> First a Source #gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> First a -> r Source #gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> First a -> r Source #gmapQ :: (forall d. Data d => d -> u) -> First a -> [u] Source #gmapQi :: Int -> (forall d. Data d => d -> u) -> First a -> u Source #gmapM :: Monad m => (forall d. Data d => d -> m d) -> First a -> m (First a) Source #gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> First a -> m (First a) Source #gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> First a -> m (First a) Source # Ord a => Ord (First a) # Methodscompare :: First a -> First a -> Ordering Source #(<) :: First a -> First a -> Bool Source #(<=) :: First a -> First a -> Bool Source #(>) :: First a -> First a -> Bool Source #(>=) :: First a -> First a -> Bool Source #max :: First a -> First a -> First a Source #min :: First a -> First a -> First a Source # Read a => Read (First a) # Methods Show a => Show (First a) # MethodsshowsPrec :: Int -> First a -> ShowS Source #show :: First a -> String Source #showList :: [First a] -> ShowS Source # Generic (First a) # Associated Typestype Rep (First a) :: * -> * Source # Methodsfrom :: First a -> Rep (First a) x Source #to :: Rep (First a) x -> First a Source # # Since: 4.9.0.0 Methods(<>) :: First a -> First a -> First a Source #sconcat :: NonEmpty (First a) -> First a Source #stimes :: Integral b => b -> First a -> First a Source # # Associated Typestype Rep1 First (f :: First -> *) :: k -> * Source # Methodsfrom1 :: f a -> Rep1 First f a Source #to1 :: Rep1 First f a -> f a Source # type Rep (First a) # type Rep (First a) = D1 * (MetaData "First" "Data.Semigroup" "base" True) (C1 * (MetaCons "First" PrefixI True) (S1 * (MetaSel (Just Symbol "getFirst") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 * a))) type Rep1 * First # type Rep1 * First = D1 * (MetaData "First" "Data.Semigroup" "base" True) (C1 * (MetaCons "First" PrefixI True) (S1 * (MetaSel (Just Symbol "getFirst") NoSourceUnpackedness NoSourceStrictness DecidedLazy) Par1)) newtype Last a Source # Use Option (Last a) to get the behavior of Last from Data.Monoid Constructors  Last FieldsgetLast :: a Instances  # Since: 4.9.0.0 Methods(>>=) :: Last a -> (a -> Last b) -> Last b Source #(>>) :: Last a -> Last b -> Last b Source #return :: a -> Last a Source # # Since: 4.9.0.0 Methodsfmap :: (a -> b) -> Last a -> Last b Source #(<$) :: a -> Last b -> Last a Source # # Since: 4.9.0.0 Methodsmfix :: (a -> Last a) -> Last a Source # # Since: 4.9.0.0 Methodspure :: a -> Last a Source #(<*>) :: Last (a -> b) -> Last a -> Last b Source #liftA2 :: (a -> b -> c) -> Last a -> Last b -> Last c Source #(*>) :: Last a -> Last b -> Last b Source #(<*) :: Last a -> Last b -> Last a Source # # Since: 4.9.0.0 Methodsfold :: Monoid m => Last m -> m Source #foldMap :: Monoid m => (a -> m) -> Last a -> m Source #foldr :: (a -> b -> b) -> b -> Last a -> b Source #foldr' :: (a -> b -> b) -> b -> Last a -> b Source #foldl :: (b -> a -> b) -> b -> Last a -> b Source #foldl' :: (b -> a -> b) -> b -> Last a -> b Source #foldr1 :: (a -> a -> a) -> Last a -> a Source #foldl1 :: (a -> a -> a) -> Last a -> a Source #toList :: Last a -> [a] Source #null :: Last a -> Bool Source #length :: Last a -> Int Source #elem :: Eq a => a -> Last a -> Bool Source #maximum :: Ord a => Last a -> a Source #minimum :: Ord a => Last a -> a Source #sum :: Num a => Last a -> a Source #product :: Num a => Last a -> a Source # # Since: 4.9.0.0 Methodstraverse :: Applicative f => (a -> f b) -> Last a -> f (Last b) Source #sequenceA :: Applicative f => Last (f a) -> f (Last a) Source #mapM :: Monad m => (a -> m b) -> Last a -> m (Last b) Source #sequence :: Monad m => Last (m a) -> m (Last a) Source # Bounded a => Bounded (Last a) # Methods Enum a => Enum (Last a) # Since: 4.9.0.0 Methodssucc :: Last a -> Last a Source #pred :: Last a -> Last a Source #toEnum :: Int -> Last a Source #fromEnum :: Last a -> Int Source #enumFrom :: Last a -> [Last a] Source #enumFromThen :: Last a -> Last a -> [Last a] Source #enumFromTo :: Last a -> Last a -> [Last a] Source #enumFromThenTo :: Last a -> Last a -> Last a -> [Last a] Source # Eq a => Eq (Last a) # Methods(==) :: Last a -> Last a -> Bool Source #(/=) :: Last a -> Last a -> Bool Source # Data a => Data (Last a) # Methodsgfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Last a -> c (Last a) Source #gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Last a) Source #dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c (Last a)) Source #dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Last a)) Source #gmapT :: (forall b. Data b => b -> b) -> Last a -> Last a Source #gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Last a -> r Source #gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Last a -> r Source #gmapQ :: (forall d. Data d => d -> u) -> Last a -> [u] Source #gmapQi :: Int -> (forall d. Data d => d -> u) -> Last a -> u Source #gmapM :: Monad m => (forall d. Data d => d -> m d) -> Last a -> m (Last a) Source #gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Last a -> m (Last a) Source #gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Last a -> m (Last a) Source # Ord a => Ord (Last a) # Methodscompare :: Last a -> Last a -> Ordering Source #(<) :: Last a -> Last a -> Bool Source #(<=) :: Last a -> Last a -> Bool Source #(>) :: Last a -> Last a -> Bool Source #(>=) :: Last a -> Last a -> Bool Source #max :: Last a -> Last a -> Last a Source #min :: Last a -> Last a -> Last a Source # Read a => Read (Last a) # MethodsreadsPrec :: Int -> ReadS (Last a) Source # Show a => Show (Last a) # MethodsshowsPrec :: Int -> Last a -> ShowS Source #show :: Last a -> String Source #showList :: [Last a] -> ShowS Source # Generic (Last a) # Associated Typestype Rep (Last a) :: * -> * Source # Methodsfrom :: Last a -> Rep (Last a) x Source #to :: Rep (Last a) x -> Last a Source # # Since: 4.9.0.0 Methods(<>) :: Last a -> Last a -> Last a Source #sconcat :: NonEmpty (Last a) -> Last a Source #stimes :: Integral b => b -> Last a -> Last a Source # # Associated Typestype Rep1 Last (f :: Last -> *) :: k -> * Source # Methodsfrom1 :: f a -> Rep1 Last f a Source #to1 :: Rep1 Last f a -> f a Source # type Rep (Last a) # type Rep (Last a) = D1 * (MetaData "Last" "Data.Semigroup" "base" True) (C1 * (MetaCons "Last" PrefixI True) (S1 * (MetaSel (Just Symbol "getLast") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 * a))) type Rep1 * Last # type Rep1 * Last = D1 * (MetaData "Last" "Data.Semigroup" "base" True) (C1 * (MetaCons "Last" PrefixI True) (S1 * (MetaSel (Just Symbol "getLast") NoSourceUnpackedness NoSourceStrictness DecidedLazy) Par1))

newtype WrappedMonoid m Source #

Provide a Semigroup for an arbitrary Monoid.

Constructors

 WrapMonoid FieldsunwrapMonoid :: m

Instances

 Bounded m => Bounded (WrappedMonoid m) # Methods Enum a => Enum (WrappedMonoid a) # Since: 4.9.0.0 MethodsenumFromTo :: WrappedMonoid a -> WrappedMonoid a -> [WrappedMonoid a] Source # Eq m => Eq (WrappedMonoid m) # Methods Data m => Data (WrappedMonoid m) # Methodsgfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> WrappedMonoid m -> c (WrappedMonoid m) Source #gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (WrappedMonoid m) Source #dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c (WrappedMonoid m)) Source #dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (WrappedMonoid m)) Source #gmapT :: (forall b. Data b => b -> b) -> WrappedMonoid m -> WrappedMonoid m Source #gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> WrappedMonoid m -> r Source #gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> WrappedMonoid m -> r Source #gmapQ :: (forall d. Data d => d -> u) -> WrappedMonoid m -> [u] Source #gmapQi :: Int -> (forall d. Data d => d -> u) -> WrappedMonoid m -> u Source #gmapM :: Monad m => (forall d. Data d => d -> m d) -> WrappedMonoid m -> m (WrappedMonoid m) Source #gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> WrappedMonoid m -> m (WrappedMonoid m) Source #gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> WrappedMonoid m -> m (WrappedMonoid m) Source # Ord m => Ord (WrappedMonoid m) # Methods(<) :: WrappedMonoid m -> WrappedMonoid m -> Bool Source #(>) :: WrappedMonoid m -> WrappedMonoid m -> Bool Source # Read m => Read (WrappedMonoid m) # Methods Show m => Show (WrappedMonoid m) # MethodsshowList :: [WrappedMonoid m] -> ShowS Source # # Associated Typestype Rep (WrappedMonoid m) :: * -> * Source # Methodsfrom :: WrappedMonoid m -> Rep (WrappedMonoid m) x Source #to :: Rep (WrappedMonoid m) x -> WrappedMonoid m Source # Monoid m => Semigroup (WrappedMonoid m) # Since: 4.9.0.0 Methodsstimes :: Integral b => b -> WrappedMonoid m -> WrappedMonoid m Source # Monoid m => Monoid (WrappedMonoid m) # Since: 4.9.0.0 Methodsmconcat :: [WrappedMonoid m] -> WrappedMonoid m Source # # Associated Typestype Rep1 WrappedMonoid (f :: WrappedMonoid -> *) :: k -> * Source # Methodsfrom1 :: f a -> Rep1 WrappedMonoid f a Source #to1 :: Rep1 WrappedMonoid f a -> f a Source # type Rep (WrappedMonoid m) # type Rep (WrappedMonoid m) = D1 * (MetaData "WrappedMonoid" "Data.Semigroup" "base" True) (C1 * (MetaCons "WrapMonoid" PrefixI True) (S1 * (MetaSel (Just Symbol "unwrapMonoid") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 * m))) # type Rep1 * WrappedMonoid = D1 * (MetaData "WrappedMonoid" "Data.Semigroup" "base" True) (C1 * (MetaCons "WrapMonoid" PrefixI True) (S1 * (MetaSel (Just Symbol "unwrapMonoid") NoSourceUnpackedness NoSourceStrictness DecidedLazy) Par1))

# Re-exported monoids from Data.Monoid

class Monoid a where Source #

The class of monoids (types with an associative binary operation that has an identity). Instances should satisfy the following laws:

• mappend mempty x = x
• mappend x mempty = x
• mappend x (mappend y z) = mappend (mappend x y) z
• mconcat = foldr mappend mempty

The method names refer to the monoid of lists under concatenation, but there are many other instances.

Some types can be viewed as a monoid in more than one way, e.g. both addition and multiplication on numbers. In such cases we often define newtypes and make those instances of Monoid, e.g. Sum and Product.

Minimal complete definition

Methods

mempty :: a Source #

Identity of mappend

mappend :: a -> a -> a Source #

An associative operation

mconcat :: [a] -> a Source #

Fold a list using the monoid. For most types, the default definition for mconcat will be used, but the function is included in the class definition so that an optimized version can be provided for specific types.

Instances

 # Since: 2.1 Methodsmconcat :: [Ordering] -> Ordering Source # Monoid () # Since: 2.1 Methodsmempty :: () Source #mappend :: () -> () -> () Source #mconcat :: [()] -> () Source # # Since: 2.1 Methodsmappend :: Any -> Any -> Any Source #mconcat :: [Any] -> Any Source # # Since: 2.1 Methodsmappend :: All -> All -> All Source #mconcat :: [All] -> All Source # # mappend takes the longer of two lifetimes.Since: 4.8.0.0 Methodsmconcat :: [Lifetime] -> Lifetime Source # # Since: 4.3.1.0 Methodsmconcat :: [Event] -> Event Source # Monoid [a] # Since: 2.1 Methodsmempty :: [a] Source #mappend :: [a] -> [a] -> [a] Source #mconcat :: [[a]] -> [a] Source # Monoid a => Monoid (Maybe a) # Lift a semigroup into Maybe forming a Monoid according to http://en.wikipedia.org/wiki/Monoid: "Any semigroup S may be turned into a monoid simply by adjoining an element e not in S and defining e*e = e and e*s = s = s*e for all s ∈ S." Since there used to be no "Semigroup" typeclass providing just mappend, we use Monoid instead.Since: 2.1 Methodsmappend :: Maybe a -> Maybe a -> Maybe a Source #mconcat :: [Maybe a] -> Maybe a Source # Monoid a => Monoid (IO a) # Since: 4.9.0.0 Methodsmappend :: IO a -> IO a -> IO a Source #mconcat :: [IO a] -> IO a Source # Monoid (Last a) # Since: 2.1 Methodsmappend :: Last a -> Last a -> Last a Source #mconcat :: [Last a] -> Last a Source # Monoid (First a) # Since: 2.1 Methodsmappend :: First a -> First a -> First a Source #mconcat :: [First a] -> First a Source # Num a => Monoid (Product a) # Since: 2.1 Methodsmappend :: Product a -> Product a -> Product a Source #mconcat :: [Product a] -> Product a Source # Num a => Monoid (Sum a) # Since: 2.1 Methodsmappend :: Sum a -> Sum a -> Sum a Source #mconcat :: [Sum a] -> Sum a Source # Monoid (Endo a) # Since: 2.1 Methodsmappend :: Endo a -> Endo a -> Endo a Source #mconcat :: [Endo a] -> Endo a Source # Monoid a => Monoid (Dual a) # Since: 2.1 Methodsmappend :: Dual a -> Dual a -> Dual a Source #mconcat :: [Dual a] -> Dual a Source # Monoid a => Monoid (Identity a) # Methodsmappend :: Identity a -> Identity a -> Identity a Source #mconcat :: [Identity a] -> Identity a Source # Semigroup a => Monoid (Option a) # Since: 4.9.0.0 Methodsmappend :: Option a -> Option a -> Option a Source #mconcat :: [Option a] -> Option a Source # Monoid m => Monoid (WrappedMonoid m) # Since: 4.9.0.0 Methodsmconcat :: [WrappedMonoid m] -> WrappedMonoid m Source # (Ord a, Bounded a) => Monoid (Max a) # Since: 4.9.0.0 Methodsmappend :: Max a -> Max a -> Max a Source #mconcat :: [Max a] -> Max a Source # (Ord a, Bounded a) => Monoid (Min a) # Since: 4.9.0.0 Methodsmappend :: Min a -> Min a -> Min a Source #mconcat :: [Min a] -> Min a Source # Monoid b => Monoid (a -> b) # Since: 2.1 Methodsmempty :: a -> b Source #mappend :: (a -> b) -> (a -> b) -> a -> b Source #mconcat :: [a -> b] -> a -> b Source # (Monoid a, Monoid b) => Monoid (a, b) # Since: 2.1 Methodsmempty :: (a, b) Source #mappend :: (a, b) -> (a, b) -> (a, b) Source #mconcat :: [(a, b)] -> (a, b) Source # Monoid (Proxy k s) # Since: 4.7.0.0 Methodsmempty :: Proxy k s Source #mappend :: Proxy k s -> Proxy k s -> Proxy k s Source #mconcat :: [Proxy k s] -> Proxy k s Source # (Monoid a, Monoid b, Monoid c) => Monoid (a, b, c) # Since: 2.1 Methodsmempty :: (a, b, c) Source #mappend :: (a, b, c) -> (a, b, c) -> (a, b, c) Source #mconcat :: [(a, b, c)] -> (a, b, c) Source # Alternative f => Monoid (Alt * f a) # Since: 4.8.0.0 Methodsmempty :: Alt * f a Source #mappend :: Alt * f a -> Alt * f a -> Alt * f a Source #mconcat :: [Alt * f a] -> Alt * f a Source # Monoid a => Monoid (Const k a b) # Methodsmempty :: Const k a b Source #mappend :: Const k a b -> Const k a b -> Const k a b Source #mconcat :: [Const k a b] -> Const k a b Source # (Monoid a, Monoid b, Monoid c, Monoid d) => Monoid (a, b, c, d) # Since: 2.1 Methodsmempty :: (a, b, c, d) Source #mappend :: (a, b, c, d) -> (a, b, c, d) -> (a, b, c, d) Source #mconcat :: [(a, b, c, d)] -> (a, b, c, d) Source # (Monoid a, Monoid b, Monoid c, Monoid d, Monoid e) => Monoid (a, b, c, d, e) # Since: 2.1 Methodsmempty :: (a, b, c, d, e) Source #mappend :: (a, b, c, d, e) -> (a, b, c, d, e) -> (a, b, c, d, e) Source #mconcat :: [(a, b, c, d, e)] -> (a, b, c, d, e) Source #

newtype Dual a Source #

The dual of a Monoid, obtained by swapping the arguments of mappend.

Constructors

 Dual FieldsgetDual :: a

Instances

 # Since: 4.8.0.0 Methods(>>=) :: Dual a -> (a -> Dual b) -> Dual b Source #(>>) :: Dual a -> Dual b -> Dual b Source #return :: a -> Dual a Source # # Since: 4.8.0.0 Methodsfmap :: (a -> b) -> Dual a -> Dual b Source #(<$) :: a -> Dual b -> Dual a Source # # Since: 4.8.0.0 Methodsmfix :: (a -> Dual a) -> Dual a Source # # Since: 4.8.0.0 Methodspure :: a -> Dual a Source #(<*>) :: Dual (a -> b) -> Dual a -> Dual b Source #liftA2 :: (a -> b -> c) -> Dual a -> Dual b -> Dual c Source #(*>) :: Dual a -> Dual b -> Dual b Source #(<*) :: Dual a -> Dual b -> Dual a Source # # Since: 4.8.0.0 Methodsfold :: Monoid m => Dual m -> m Source #foldMap :: Monoid m => (a -> m) -> Dual a -> m Source #foldr :: (a -> b -> b) -> b -> Dual a -> b Source #foldr' :: (a -> b -> b) -> b -> Dual a -> b Source #foldl :: (b -> a -> b) -> b -> Dual a -> b Source #foldl' :: (b -> a -> b) -> b -> Dual a -> b Source #foldr1 :: (a -> a -> a) -> Dual a -> a Source #foldl1 :: (a -> a -> a) -> Dual a -> a Source #toList :: Dual a -> [a] Source #null :: Dual a -> Bool Source #length :: Dual a -> Int Source #elem :: Eq a => a -> Dual a -> Bool Source #maximum :: Ord a => Dual a -> a Source #minimum :: Ord a => Dual a -> a Source #sum :: Num a => Dual a -> a Source #product :: Num a => Dual a -> a Source # # Since: 4.8.0.0 Methodstraverse :: Applicative f => (a -> f b) -> Dual a -> f (Dual b) Source #sequenceA :: Applicative f => Dual (f a) -> f (Dual a) Source #mapM :: Monad m => (a -> m b) -> Dual a -> m (Dual b) Source #sequence :: Monad m => Dual (m a) -> m (Dual a) Source # # Since: 4.8.0.0 Methodsmzip :: Dual a -> Dual b -> Dual (a, b) Source #mzipWith :: (a -> b -> c) -> Dual a -> Dual b -> Dual c Source #munzip :: Dual (a, b) -> (Dual a, Dual b) Source # Bounded a => Bounded (Dual a) # Methods Eq a => Eq (Dual a) # Methods(==) :: Dual a -> Dual a -> Bool Source #(/=) :: Dual a -> Dual a -> Bool Source # Data a => Data (Dual a) # Since: 4.8.0.0 Methodsgfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Dual a -> c (Dual a) Source #gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Dual a) Source #dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c (Dual a)) Source #dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Dual a)) Source #gmapT :: (forall b. Data b => b -> b) -> Dual a -> Dual a Source #gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Dual a -> r Source #gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Dual a -> r Source #gmapQ :: (forall d. Data d => d -> u) -> Dual a -> [u] Source #gmapQi :: Int -> (forall d. Data d => d -> u) -> Dual a -> u Source #gmapM :: Monad m => (forall d. Data d => d -> m d) -> Dual a -> m (Dual a) Source #gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Dual a -> m (Dual a) Source #gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Dual a -> m (Dual a) Source # Ord a => Ord (Dual a) # Methodscompare :: Dual a -> Dual a -> Ordering Source #(<) :: Dual a -> Dual a -> Bool Source #(<=) :: Dual a -> Dual a -> Bool Source #(>) :: Dual a -> Dual a -> Bool Source #(>=) :: Dual a -> Dual a -> Bool Source #max :: Dual a -> Dual a -> Dual a Source #min :: Dual a -> Dual a -> Dual a Source # Read a => Read (Dual a) # MethodsreadsPrec :: Int -> ReadS (Dual a) Source # Show a => Show (Dual a) # MethodsshowsPrec :: Int -> Dual a -> ShowS Source #show :: Dual a -> String Source #showList :: [Dual a] -> ShowS Source # Generic (Dual a) # Associated Typestype Rep (Dual a) :: * -> * Source # Methodsfrom :: Dual a -> Rep (Dual a) x Source #to :: Rep (Dual a) x -> Dual a Source # Semigroup a => Semigroup (Dual a) # Since: 4.9.0.0 Methods(<>) :: Dual a -> Dual a -> Dual a Source #sconcat :: NonEmpty (Dual a) -> Dual a Source #stimes :: Integral b => b -> Dual a -> Dual a Source # Monoid a => Monoid (Dual a) # Since: 2.1 Methodsmappend :: Dual a -> Dual a -> Dual a Source #mconcat :: [Dual a] -> Dual a Source # # Associated Typestype Rep1 Dual (f :: Dual -> *) :: k -> * Source # Methodsfrom1 :: f a -> Rep1 Dual f a Source #to1 :: Rep1 Dual f a -> f a Source # type Rep (Dual a) # type Rep (Dual a) = D1 * (MetaData "Dual" "Data.Monoid" "base" True) (C1 * (MetaCons "Dual" PrefixI True) (S1 * (MetaSel (Just Symbol "getDual") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 * a))) type Rep1 * Dual # type Rep1 * Dual = D1 * (MetaData "Dual" "Data.Monoid" "base" True) (C1 * (MetaCons "Dual" PrefixI True) (S1 * (MetaSel (Just Symbol "getDual") NoSourceUnpackedness NoSourceStrictness DecidedLazy) Par1)) newtype Endo a Source # The monoid of endomorphisms under composition. Constructors  Endo FieldsappEndo :: a -> a Instances  Generic (Endo a) # Associated Typestype Rep (Endo a) :: * -> * Source # Methodsfrom :: Endo a -> Rep (Endo a) x Source #to :: Rep (Endo a) x -> Endo a Source # # Since: 4.9.0.0 Methods(<>) :: Endo a -> Endo a -> Endo a Source #sconcat :: NonEmpty (Endo a) -> Endo a Source #stimes :: Integral b => b -> Endo a -> Endo a Source # Monoid (Endo a) # Since: 2.1 Methodsmappend :: Endo a -> Endo a -> Endo a Source #mconcat :: [Endo a] -> Endo a Source # type Rep (Endo a) # type Rep (Endo a) = D1 * (MetaData "Endo" "Data.Monoid" "base" True) (C1 * (MetaCons "Endo" PrefixI True) (S1 * (MetaSel (Just Symbol "appEndo") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 * (a -> a)))) newtype All Source # Boolean monoid under conjunction (&&). Constructors  All FieldsgetAll :: Bool Instances  # Methods # Methods(==) :: All -> All -> Bool Source #(/=) :: All -> All -> Bool Source # # Since: 4.8.0.0 Methodsgfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> All -> c All Source #gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c All Source #dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c All) Source #dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c All) Source #gmapT :: (forall b. Data b => b -> b) -> All -> All Source #gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> All -> r Source #gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> All -> r Source #gmapQ :: (forall d. Data d => d -> u) -> All -> [u] Source #gmapQi :: Int -> (forall d. Data d => d -> u) -> All -> u Source #gmapM :: Monad m => (forall d. Data d => d -> m d) -> All -> m All Source #gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> All -> m All Source #gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> All -> m All Source # # Methods(<) :: All -> All -> Bool Source #(<=) :: All -> All -> Bool Source #(>) :: All -> All -> Bool Source #(>=) :: All -> All -> Bool Source #max :: All -> All -> All Source #min :: All -> All -> All Source # # Methods # MethodsshowList :: [All] -> ShowS Source # # Associated Typestype Rep All :: * -> * Source # Methodsfrom :: All -> Rep All x Source #to :: Rep All x -> All Source # # Since: 4.9.0.0 Methods(<>) :: All -> All -> All Source #stimes :: Integral b => b -> All -> All Source # # Since: 2.1 Methodsmappend :: All -> All -> All Source #mconcat :: [All] -> All Source # type Rep All # type Rep All = D1 * (MetaData "All" "Data.Monoid" "base" True) (C1 * (MetaCons "All" PrefixI True) (S1 * (MetaSel (Just Symbol "getAll") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 * Bool))) newtype Any Source # Boolean monoid under disjunction (||). Constructors  Any FieldsgetAny :: Bool Instances  # Methods # Methods(==) :: Any -> Any -> Bool Source #(/=) :: Any -> Any -> Bool Source # # Since: 4.8.0.0 Methodsgfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Any -> c Any Source #gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Any Source #dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c Any) Source #dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Any) Source #gmapT :: (forall b. Data b => b -> b) -> Any -> Any Source #gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Any -> r Source #gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Any -> r Source #gmapQ :: (forall d. Data d => d -> u) -> Any -> [u] Source #gmapQi :: Int -> (forall d. Data d => d -> u) -> Any -> u Source #gmapM :: Monad m => (forall d. Data d => d -> m d) -> Any -> m Any Source #gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Any -> m Any Source #gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Any -> m Any Source # # Methods(<) :: Any -> Any -> Bool Source #(<=) :: Any -> Any -> Bool Source #(>) :: Any -> Any -> Bool Source #(>=) :: Any -> Any -> Bool Source #max :: Any -> Any -> Any Source #min :: Any -> Any -> Any Source # # Methods # MethodsshowList :: [Any] -> ShowS Source # # Associated Typestype Rep Any :: * -> * Source # Methodsfrom :: Any -> Rep Any x Source #to :: Rep Any x -> Any Source # # Since: 4.9.0.0 Methods(<>) :: Any -> Any -> Any Source #stimes :: Integral b => b -> Any -> Any Source # # Since: 2.1 Methodsmappend :: Any -> Any -> Any Source #mconcat :: [Any] -> Any Source # type Rep Any # type Rep Any = D1 * (MetaData "Any" "Data.Monoid" "base" True) (C1 * (MetaCons "Any" PrefixI True) (S1 * (MetaSel (Just Symbol "getAny") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 * Bool))) newtype Sum a Source # Monoid under addition. Constructors  Sum FieldsgetSum :: a Instances  # Since: 4.8.0.0 Methods(>>=) :: Sum a -> (a -> Sum b) -> Sum b Source #(>>) :: Sum a -> Sum b -> Sum b Source #return :: a -> Sum a Source #fail :: String -> Sum a Source # # Since: 4.8.0.0 Methodsfmap :: (a -> b) -> Sum a -> Sum b Source #(<$) :: a -> Sum b -> Sum a Source # # Since: 4.8.0.0 Methodsmfix :: (a -> Sum a) -> Sum a Source # # Since: 4.8.0.0 Methodspure :: a -> Sum a Source #(<*>) :: Sum (a -> b) -> Sum a -> Sum b Source #liftA2 :: (a -> b -> c) -> Sum a -> Sum b -> Sum c Source #(*>) :: Sum a -> Sum b -> Sum b Source #(<*) :: Sum a -> Sum b -> Sum a Source # # Since: 4.8.0.0 Methodsfold :: Monoid m => Sum m -> m Source #foldMap :: Monoid m => (a -> m) -> Sum a -> m Source #foldr :: (a -> b -> b) -> b -> Sum a -> b Source #foldr' :: (a -> b -> b) -> b -> Sum a -> b Source #foldl :: (b -> a -> b) -> b -> Sum a -> b Source #foldl' :: (b -> a -> b) -> b -> Sum a -> b Source #foldr1 :: (a -> a -> a) -> Sum a -> a Source #foldl1 :: (a -> a -> a) -> Sum a -> a Source #toList :: Sum a -> [a] Source #null :: Sum a -> Bool Source #length :: Sum a -> Int Source #elem :: Eq a => a -> Sum a -> Bool Source #maximum :: Ord a => Sum a -> a Source #minimum :: Ord a => Sum a -> a Source #sum :: Num a => Sum a -> a Source #product :: Num a => Sum a -> a Source # # Since: 4.8.0.0 Methodstraverse :: Applicative f => (a -> f b) -> Sum a -> f (Sum b) Source #sequenceA :: Applicative f => Sum (f a) -> f (Sum a) Source #mapM :: Monad m => (a -> m b) -> Sum a -> m (Sum b) Source #sequence :: Monad m => Sum (m a) -> m (Sum a) Source # # Since: 4.8.0.0 Methodsmzip :: Sum a -> Sum b -> Sum (a, b) Source #mzipWith :: (a -> b -> c) -> Sum a -> Sum b -> Sum c Source #munzip :: Sum (a, b) -> (Sum a, Sum b) Source # Bounded a => Bounded (Sum a) # Methods Eq a => Eq (Sum a) # Methods(==) :: Sum a -> Sum a -> Bool Source #(/=) :: Sum a -> Sum a -> Bool Source # Data a => Data (Sum a) # Since: 4.8.0.0 Methodsgfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Sum a -> c (Sum a) Source #gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Sum a) Source #toConstr :: Sum a -> Constr Source #dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c (Sum a)) Source #dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Sum a)) Source #gmapT :: (forall b. Data b => b -> b) -> Sum a -> Sum a Source #gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Sum a -> r Source #gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Sum a -> r Source #gmapQ :: (forall d. Data d => d -> u) -> Sum a -> [u] Source #gmapQi :: Int -> (forall d. Data d => d -> u) -> Sum a -> u Source #gmapM :: Monad m => (forall d. Data d => d -> m d) -> Sum a -> m (Sum a) Source #gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Sum a -> m (Sum a) Source #gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Sum a -> m (Sum a) Source # Num a => Num (Sum a) # Methods(+) :: Sum a -> Sum a -> Sum a Source #(-) :: Sum a -> Sum a -> Sum a Source #(*) :: Sum a -> Sum a -> Sum a Source #negate :: Sum a -> Sum a Source #abs :: Sum a -> Sum a Source #signum :: Sum a -> Sum a Source # Ord a => Ord (Sum a) # Methodscompare :: Sum a -> Sum a -> Ordering Source #(<) :: Sum a -> Sum a -> Bool Source #(<=) :: Sum a -> Sum a -> Bool Source #(>) :: Sum a -> Sum a -> Bool Source #(>=) :: Sum a -> Sum a -> Bool Source #max :: Sum a -> Sum a -> Sum a Source #min :: Sum a -> Sum a -> Sum a Source # Read a => Read (Sum a) # MethodsreadsPrec :: Int -> ReadS (Sum a) Source # Show a => Show (Sum a) # MethodsshowsPrec :: Int -> Sum a -> ShowS Source #show :: Sum a -> String Source #showList :: [Sum a] -> ShowS Source # Generic (Sum a) # Associated Typestype Rep (Sum a) :: * -> * Source # Methodsfrom :: Sum a -> Rep (Sum a) x Source #to :: Rep (Sum a) x -> Sum a Source # Num a => Semigroup (Sum a) # Since: 4.9.0.0 Methods(<>) :: Sum a -> Sum a -> Sum a Source #sconcat :: NonEmpty (Sum a) -> Sum a Source #stimes :: Integral b => b -> Sum a -> Sum a Source # Num a => Monoid (Sum a) # Since: 2.1 Methodsmappend :: Sum a -> Sum a -> Sum a Source #mconcat :: [Sum a] -> Sum a Source # # Associated Typestype Rep1 Sum (f :: Sum -> *) :: k -> * Source # Methodsfrom1 :: f a -> Rep1 Sum f a Source #to1 :: Rep1 Sum f a -> f a Source # type Rep (Sum a) # type Rep (Sum a) = D1 * (MetaData "Sum" "Data.Monoid" "base" True) (C1 * (MetaCons "Sum" PrefixI True) (S1 * (MetaSel (Just Symbol "getSum") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 * a))) type Rep1 * Sum # type Rep1 * Sum = D1 * (MetaData "Sum" "Data.Monoid" "base" True) (C1 * (MetaCons "Sum" PrefixI True) (S1 * (MetaSel (Just Symbol "getSum") NoSourceUnpackedness NoSourceStrictness DecidedLazy) Par1))

newtype Product a Source #

Monoid under multiplication.

Constructors

 Product FieldsgetProduct :: a

Instances

 # Since: 4.8.0.0 Methods(>>=) :: Product a -> (a -> Product b) -> Product b Source #(>>) :: Product a -> Product b -> Product b Source #return :: a -> Product a Source # # Since: 4.8.0.0 Methodsfmap :: (a -> b) -> Product a -> Product b Source #(<$) :: a -> Product b -> Product a Source # # Since: 4.8.0.0 Methodsmfix :: (a -> Product a) -> Product a Source # # Since: 4.8.0.0 Methodspure :: a -> Product a Source #(<*>) :: Product (a -> b) -> Product a -> Product b Source #liftA2 :: (a -> b -> c) -> Product a -> Product b -> Product c Source #(*>) :: Product a -> Product b -> Product b Source #(<*) :: Product a -> Product b -> Product a Source # # Since: 4.8.0.0 Methodsfold :: Monoid m => Product m -> m Source #foldMap :: Monoid m => (a -> m) -> Product a -> m Source #foldr :: (a -> b -> b) -> b -> Product a -> b Source #foldr' :: (a -> b -> b) -> b -> Product a -> b Source #foldl :: (b -> a -> b) -> b -> Product a -> b Source #foldl' :: (b -> a -> b) -> b -> Product a -> b Source #foldr1 :: (a -> a -> a) -> Product a -> a Source #foldl1 :: (a -> a -> a) -> Product a -> a Source #toList :: Product a -> [a] Source #null :: Product a -> Bool Source #length :: Product a -> Int Source #elem :: Eq a => a -> Product a -> Bool Source #maximum :: Ord a => Product a -> a Source #minimum :: Ord a => Product a -> a Source #sum :: Num a => Product a -> a Source #product :: Num a => Product a -> a Source # # Since: 4.8.0.0 Methodstraverse :: Applicative f => (a -> f b) -> Product a -> f (Product b) Source #sequenceA :: Applicative f => Product (f a) -> f (Product a) Source #mapM :: Monad m => (a -> m b) -> Product a -> m (Product b) Source #sequence :: Monad m => Product (m a) -> m (Product a) Source # # Since: 4.8.0.0 Methodsmzip :: Product a -> Product b -> Product (a, b) Source #mzipWith :: (a -> b -> c) -> Product a -> Product b -> Product c Source #munzip :: Product (a, b) -> (Product a, Product b) Source # Bounded a => Bounded (Product a) # Methods Eq a => Eq (Product a) # Methods(==) :: Product a -> Product a -> Bool Source #(/=) :: Product a -> Product a -> Bool Source # Data a => Data (Product a) # Since: 4.8.0.0 Methodsgfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Product a -> c (Product a) Source #gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Product a) Source #dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c (Product a)) Source #dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Product a)) Source #gmapT :: (forall b. Data b => b -> b) -> Product a -> Product a Source #gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Product a -> r Source #gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Product a -> r Source #gmapQ :: (forall d. Data d => d -> u) -> Product a -> [u] Source #gmapQi :: Int -> (forall d. Data d => d -> u) -> Product a -> u Source #gmapM :: Monad m => (forall d. Data d => d -> m d) -> Product a -> m (Product a) Source #gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Product a -> m (Product a) Source #gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Product a -> m (Product a) Source # Num a => Num (Product a) # Methods(+) :: Product a -> Product a -> Product a Source #(-) :: Product a -> Product a -> Product a Source #(*) :: Product a -> Product a -> Product a Source #negate :: Product a -> Product a Source #abs :: Product a -> Product a Source #signum :: Product a -> Product a Source # Ord a => Ord (Product a) # Methodscompare :: Product a -> Product a -> Ordering Source #(<) :: Product a -> Product a -> Bool Source #(<=) :: Product a -> Product a -> Bool Source #(>) :: Product a -> Product a -> Bool Source #(>=) :: Product a -> Product a -> Bool Source #max :: Product a -> Product a -> Product a Source #min :: Product a -> Product a -> Product a Source # Read a => Read (Product a) # Methods Show a => Show (Product a) # MethodsshowsPrec :: Int -> Product a -> ShowS Source #show :: Product a -> String Source #showList :: [Product a] -> ShowS Source # # Associated Typestype Rep (Product a) :: * -> * Source # Methodsfrom :: Product a -> Rep (Product a) x Source #to :: Rep (Product a) x -> Product a Source # Num a => Semigroup (Product a) # Since: 4.9.0.0 Methods(<>) :: Product a -> Product a -> Product a Source #sconcat :: NonEmpty (Product a) -> Product a Source #stimes :: Integral b => b -> Product a -> Product a Source # Num a => Monoid (Product a) # Since: 2.1 Methodsmappend :: Product a -> Product a -> Product a Source #mconcat :: [Product a] -> Product a Source # # Associated Typestype Rep1 Product (f :: Product -> *) :: k -> * Source # Methodsfrom1 :: f a -> Rep1 Product f a Source #to1 :: Rep1 Product f a -> f a Source # type Rep (Product a) # type Rep (Product a) = D1 * (MetaData "Product" "Data.Monoid" "base" True) (C1 * (MetaCons "Product" PrefixI True) (S1 * (MetaSel (Just Symbol "getProduct") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 * a))) type Rep1 * Product # type Rep1 * Product = D1 * (MetaData "Product" "Data.Monoid" "base" True) (C1 * (MetaCons "Product" PrefixI True) (S1 * (MetaSel (Just Symbol "getProduct") NoSourceUnpackedness NoSourceStrictness DecidedLazy) Par1)) # A better monoid for Maybe newtype Option a Source # Option is effectively Maybe with a better instance of Monoid, built off of an underlying Semigroup instead of an underlying Monoid. Ideally, this type would not exist at all and we would just fix the Monoid instance of Maybe Constructors  Option FieldsgetOption :: Maybe a Instances  # Since: 4.9.0.0 Methods(>>=) :: Option a -> (a -> Option b) -> Option b Source #(>>) :: Option a -> Option b -> Option b Source #return :: a -> Option a Source # # Since: 4.9.0.0 Methodsfmap :: (a -> b) -> Option a -> Option b Source #(<$) :: a -> Option b -> Option a Source # # Since: 4.9.0.0 Methodsmfix :: (a -> Option a) -> Option a Source # # Since: 4.9.0.0 Methodspure :: a -> Option a Source #(<*>) :: Option (a -> b) -> Option a -> Option b Source #liftA2 :: (a -> b -> c) -> Option a -> Option b -> Option c Source #(*>) :: Option a -> Option b -> Option b Source #(<*) :: Option a -> Option b -> Option a Source # # Since: 4.9.0.0 Methodsfold :: Monoid m => Option m -> m Source #foldMap :: Monoid m => (a -> m) -> Option a -> m Source #foldr :: (a -> b -> b) -> b -> Option a -> b Source #foldr' :: (a -> b -> b) -> b -> Option a -> b Source #foldl :: (b -> a -> b) -> b -> Option a -> b Source #foldl' :: (b -> a -> b) -> b -> Option a -> b Source #foldr1 :: (a -> a -> a) -> Option a -> a Source #foldl1 :: (a -> a -> a) -> Option a -> a Source #toList :: Option a -> [a] Source #null :: Option a -> Bool Source #length :: Option a -> Int Source #elem :: Eq a => a -> Option a -> Bool Source #maximum :: Ord a => Option a -> a Source #minimum :: Ord a => Option a -> a Source #sum :: Num a => Option a -> a Source #product :: Num a => Option a -> a Source # # Since: 4.9.0.0 Methodstraverse :: Applicative f => (a -> f b) -> Option a -> f (Option b) Source #sequenceA :: Applicative f => Option (f a) -> f (Option a) Source #mapM :: Monad m => (a -> m b) -> Option a -> m (Option b) Source #sequence :: Monad m => Option (m a) -> m (Option a) Source # # Since: 4.9.0.0 Methodsmplus :: Option a -> Option a -> Option a Source # # Since: 4.9.0.0 Methods(<|>) :: Option a -> Option a -> Option a Source #some :: Option a -> Option [a] Source #many :: Option a -> Option [a] Source # Eq a => Eq (Option a) # Methods(==) :: Option a -> Option a -> Bool Source #(/=) :: Option a -> Option a -> Bool Source # Data a => Data (Option a) # Methodsgfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Option a -> c (Option a) Source #gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Option a) Source #dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c (Option a)) Source #dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Option a)) Source #gmapT :: (forall b. Data b => b -> b) -> Option a -> Option a Source #gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Option a -> r Source #gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Option a -> r Source #gmapQ :: (forall d. Data d => d -> u) -> Option a -> [u] Source #gmapQi :: Int -> (forall d. Data d => d -> u) -> Option a -> u Source #gmapM :: Monad m => (forall d. Data d => d -> m d) -> Option a -> m (Option a) Source #gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Option a -> m (Option a) Source #gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Option a -> m (Option a) Source # Ord a => Ord (Option a) # Methodscompare :: Option a -> Option a -> Ordering Source #(<) :: Option a -> Option a -> Bool Source #(<=) :: Option a -> Option a -> Bool Source #(>) :: Option a -> Option a -> Bool Source #(>=) :: Option a -> Option a -> Bool Source #max :: Option a -> Option a -> Option a Source #min :: Option a -> Option a -> Option a Source # Read a => Read (Option a) # Methods Show a => Show (Option a) # MethodsshowsPrec :: Int -> Option a -> ShowS Source #show :: Option a -> String Source #showList :: [Option a] -> ShowS Source # # Associated Typestype Rep (Option a) :: * -> * Source # Methodsfrom :: Option a -> Rep (Option a) x Source #to :: Rep (Option a) x -> Option a Source # Semigroup a => Semigroup (Option a) # Since: 4.9.0.0 Methods(<>) :: Option a -> Option a -> Option a Source #sconcat :: NonEmpty (Option a) -> Option a Source #stimes :: Integral b => b -> Option a -> Option a Source # Semigroup a => Monoid (Option a) # Since: 4.9.0.0 Methodsmappend :: Option a -> Option a -> Option a Source #mconcat :: [Option a] -> Option a Source # # Associated Typestype Rep1 Option (f :: Option -> *) :: k -> * Source # Methodsfrom1 :: f a -> Rep1 Option f a Source #to1 :: Rep1 Option f a -> f a Source # type Rep (Option a) # type Rep (Option a) = D1 * (MetaData "Option" "Data.Semigroup" "base" True) (C1 * (MetaCons "Option" PrefixI True) (S1 * (MetaSel (Just Symbol "getOption") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 * (Maybe a)))) type Rep1 * Option # type Rep1 * Option = D1 * (MetaData "Option" "Data.Semigroup" "base" True) (C1 * (MetaCons "Option" PrefixI True) (S1 * (MetaSel (Just Symbol "getOption") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec1 * Maybe)))

option :: b -> (a -> b) -> Option a -> b Source #

Fold an Option case-wise, just like maybe.

# Difference lists of a semigroup

diff :: Semigroup m => m -> Endo m Source #

This lets you use a difference list of a Semigroup as a Monoid.

cycle1 :: Semigroup m => m -> m Source #

A generalization of cycle to an arbitrary Semigroup. May fail to terminate for some values in some semigroups.

# ArgMin, ArgMax

data Arg a b Source #

Arg isn't itself a Semigroup in its own right, but it can be placed inside Min and Max to compute an arg min or arg max.

Constructors

 Arg a b

Instances