License	BSD-style
Maintainer	Vincent Hanquez <[email protected]>
Stability	experimental
Portability	portable
Safe Haskell	Safe-Inferred
Language	Haskell2010

Basement.Compat.Identity

Description

Identity re-export, with a compat wrapper for older version of base that do not have Data.Functor.Identity

Synopsis

newtype Identity a = Identity {
- runIdentity :: a
}

Documentation

newtype Identity a #

Identity functor and monad. (a non-strict monad)

Examples

Expand

>>> fmap (+1) (Identity 0)
Identity 1

>>> Identity [1, 2, 3] <> Identity [4, 5, 6]
Identity [1,2,3,4,5,6]

>>> do
      x <- Identity 10
      y <- Identity (x + 5)
      pure (x + y)
Identity 25

Since: base-4.8.0.0

Constructors

Identity
Fields runIdentity :: a

Instances

Instances details

MonadZip Identity

Since: base-4.8.0.0

Instance details

Defined in Control.Monad.Zip

Methods

mzip :: Identity a -> Identity b -> Identity (a, b) #

mzipWith :: (a -> b -> c) -> Identity a -> Identity b -> Identity c #

munzip :: Identity (a, b) -> (Identity a, Identity b) #

Foldable1 Identity

Since: base-4.18.0.0

Instance details

Defined in Data.Foldable1

Methods

fold1 :: Semigroup m => Identity m -> m #

foldMap1 :: Semigroup m => (a -> m) -> Identity a -> m #

foldMap1' :: Semigroup m => (a -> m) -> Identity a -> m #

toNonEmpty :: Identity a -> NonEmpty a #

maximum :: Ord a => Identity a -> a #

minimum :: Ord a => Identity a -> a #

head :: Identity a -> a #

last :: Identity a -> a #

foldrMap1 :: (a -> b) -> (a -> b -> b) -> Identity a -> b #

foldlMap1' :: (a -> b) -> (b -> a -> b) -> Identity a -> b #

foldlMap1 :: (a -> b) -> (b -> a -> b) -> Identity a -> b #

foldrMap1' :: (a -> b) -> (a -> b -> b) -> Identity a -> b #

Eq1 Identity

Since: base-4.9.0.0

Instance details

Defined in Data.Functor.Classes

Methods

liftEq :: (a -> b -> Bool) -> Identity a -> Identity b -> Bool #

Ord1 Identity

Since: base-4.9.0.0

Instance details

Defined in Data.Functor.Classes

Methods

liftCompare :: (a -> b -> Ordering) -> Identity a -> Identity b -> Ordering #

Read1 Identity

Since: base-4.9.0.0

Instance details

Defined in Data.Functor.Classes

Methods

liftReadsPrec :: (Int -> ReadS a) -> ReadS [a] -> Int -> ReadS (Identity a) #

liftReadList :: (Int -> ReadS a) -> ReadS [a] -> ReadS [Identity a] #

liftReadPrec :: ReadPrec a -> ReadPrec [a] -> ReadPrec (Identity a) #

liftReadListPrec :: ReadPrec a -> ReadPrec [a] -> ReadPrec [Identity a] #

Show1 Identity

Since: base-4.9.0.0

Instance details

Defined in Data.Functor.Classes

Methods

liftShowsPrec :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> Int -> Identity a -> ShowS #

liftShowList :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> [Identity a] -> ShowS #

Applicative Identity

Since: base-4.8.0.0

Instance details

Defined in GHC.Internal.Data.Functor.Identity

Methods

pure :: a -> Identity a #

(<*>) :: Identity (a -> b) -> Identity a -> Identity b #

liftA2 :: (a -> b -> c) -> Identity a -> Identity b -> Identity c #

(*>) :: Identity a -> Identity b -> Identity b #

(<*) :: Identity a -> Identity b -> Identity a #

Functor Identity

Since: base-4.8.0.0

Instance details

Defined in GHC.Internal.Data.Functor.Identity

Methods

fmap :: (a -> b) -> Identity a -> Identity b #

(<$) :: a -> Identity b -> Identity a #

Monad Identity

Since: base-4.8.0.0

Instance details

Defined in GHC.Internal.Data.Functor.Identity

Methods

(>>=) :: Identity a -> (a -> Identity b) -> Identity b #

(>>) :: Identity a -> Identity b -> Identity b #

return :: a -> Identity a #

MonadFix Identity

Since: base-4.8.0.0

Instance details

Defined in GHC.Internal.Data.Functor.Identity

Methods

mfix :: (a -> Identity a) -> Identity a #

Foldable Identity

Since: base-4.8.0.0

Instance details

Defined in GHC.Internal.Data.Functor.Identity

Methods

fold :: Monoid m => Identity m -> m #

foldMap :: Monoid m => (a -> m) -> Identity a -> m #

foldMap' :: Monoid m => (a -> m) -> Identity a -> m #

foldr :: (a -> b -> b) -> b -> Identity a -> b #

foldr' :: (a -> b -> b) -> b -> Identity a -> b #

foldl :: (b -> a -> b) -> b -> Identity a -> b #

foldl' :: (b -> a -> b) -> b -> Identity a -> b #

foldr1 :: (a -> a -> a) -> Identity a -> a #

foldl1 :: (a -> a -> a) -> Identity a -> a #

toList :: Identity a -> [a] #

null :: Identity a -> Bool #

length :: Identity a -> Int #

elem :: Eq a => a -> Identity a -> Bool #

maximum :: Ord a => Identity a -> a #

minimum :: Ord a => Identity a -> a #

sum :: Num a => Identity a -> a #

product :: Num a => Identity a -> a #

Traversable Identity

Since: base-4.9.0.0

Instance details

Defined in GHC.Internal.Data.Traversable

Methods

traverse :: Applicative f => (a -> f b) -> Identity a -> f (Identity b) #

sequenceA :: Applicative f => Identity (f a) -> f (Identity a) #

mapM :: Monad m => (a -> m b) -> Identity a -> m (Identity b) #

sequence :: Monad m => Identity (m a) -> m (Identity a) #

Generic1 Identity

Instance details

Defined in GHC.Internal.Data.Functor.Identity

Associated Types

type Rep1 Identity	Since: base-4.8.0.0
Instance details Defined in GHC.Internal.Data.Functor.Identity type Rep1 Identity = D1 ('MetaData "Identity" "GHC.Internal.Data.Functor.Identity" "ghc-internal" 'True) (C1 ('MetaCons "Identity" 'PrefixI 'True) (S1 ('MetaSel ('Just "runIdentity") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) Par1))

Methods

from1 :: Identity a -> Rep1 Identity a #

to1 :: Rep1 Identity a -> Identity a #

Monoid a => Monoid (Identity a)

Since: base-4.9.0.0

Instance details

Defined in GHC.Internal.Data.Functor.Identity

Methods

mempty :: Identity a #

mappend :: Identity a -> Identity a -> Identity a #

mconcat :: [Identity a] -> Identity a #

Semigroup a => Semigroup (Identity a)

Since: base-4.9.0.0

Instance details

Defined in GHC.Internal.Data.Functor.Identity

Methods

(<>) :: Identity a -> Identity a -> Identity a #

sconcat :: NonEmpty (Identity a) -> Identity a #

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

Bits a => Bits (Identity a)

Since: base-4.9.0.0

Instance details

Defined in GHC.Internal.Data.Functor.Identity

Methods

(.&.) :: Identity a -> Identity a -> Identity a #

(.|.) :: Identity a -> Identity a -> Identity a #

xor :: Identity a -> Identity a -> Identity a #

complement :: Identity a -> Identity a #

shift :: Identity a -> Int -> Identity a #

rotate :: Identity a -> Int -> Identity a #

zeroBits :: Identity a #

bit :: Int -> Identity a #

setBit :: Identity a -> Int -> Identity a #

clearBit :: Identity a -> Int -> Identity a #

complementBit :: Identity a -> Int -> Identity a #

testBit :: Identity a -> Int -> Bool #

bitSizeMaybe :: Identity a -> Maybe Int #

bitSize :: Identity a -> Int #

isSigned :: Identity a -> Bool #

shiftL :: Identity a -> Int -> Identity a #

unsafeShiftL :: Identity a -> Int -> Identity a #

shiftR :: Identity a -> Int -> Identity a #

unsafeShiftR :: Identity a -> Int -> Identity a #

rotateL :: Identity a -> Int -> Identity a #

rotateR :: Identity a -> Int -> Identity a #

popCount :: Identity a -> Int #

FiniteBits a => FiniteBits (Identity a)

Since: base-4.9.0.0

Instance details

Defined in GHC.Internal.Data.Functor.Identity

Methods

finiteBitSize :: Identity a -> Int #

countLeadingZeros :: Identity a -> Int #

countTrailingZeros :: Identity a -> Int #

Data a => Data (Identity a)

Since: base-4.9.0.0

Instance details

Defined in GHC.Internal.Data.Data

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Identity a -> c (Identity a) #

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Identity a) #

toConstr :: Identity a -> Constr #

dataTypeOf :: Identity a -> DataType #

dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (Identity a)) #

dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Identity a)) #

gmapT :: (forall b. Data b => b -> b) -> Identity a -> Identity a #

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Identity a -> r #

gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Identity a -> r #

gmapQ :: (forall d. Data d => d -> u) -> Identity a -> [u] #

gmapQi :: Int -> (forall d. Data d => d -> u) -> Identity a -> u #

gmapM :: Monad m => (forall d. Data d => d -> m d) -> Identity a -> m (Identity a) #

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Identity a -> m (Identity a) #

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Identity a -> m (Identity a) #

IsString a => IsString (Identity a)

Since: base-4.9.0.0

Instance details

Defined in GHC.Internal.Data.String

Methods

fromString :: String -> Identity a #

Bounded a => Bounded (Identity a)

Since: base-4.9.0.0

Instance details

Defined in GHC.Internal.Data.Functor.Identity

Methods

minBound :: Identity a #

maxBound :: Identity a #

Enum a => Enum (Identity a)

Since: base-4.9.0.0

Instance details

Defined in GHC.Internal.Data.Functor.Identity

Methods

succ :: Identity a -> Identity a #

pred :: Identity a -> Identity a #

toEnum :: Int -> Identity a #

fromEnum :: Identity a -> Int #

enumFrom :: Identity a -> [Identity a] #

enumFromThen :: Identity a -> Identity a -> [Identity a] #

enumFromTo :: Identity a -> Identity a -> [Identity a] #

enumFromThenTo :: Identity a -> Identity a -> Identity a -> [Identity a] #

Floating a => Floating (Identity a)

Since: base-4.9.0.0

Instance details

Defined in GHC.Internal.Data.Functor.Identity

Methods

pi :: Identity a #

exp :: Identity a -> Identity a #

log :: Identity a -> Identity a #

sqrt :: Identity a -> Identity a #

(**) :: Identity a -> Identity a -> Identity a #

logBase :: Identity a -> Identity a -> Identity a #

sin :: Identity a -> Identity a #

cos :: Identity a -> Identity a #

tan :: Identity a -> Identity a #

asin :: Identity a -> Identity a #

acos :: Identity a -> Identity a #

atan :: Identity a -> Identity a #

sinh :: Identity a -> Identity a #

cosh :: Identity a -> Identity a #

tanh :: Identity a -> Identity a #

asinh :: Identity a -> Identity a #

acosh :: Identity a -> Identity a #

atanh :: Identity a -> Identity a #

log1p :: Identity a -> Identity a #

expm1 :: Identity a -> Identity a #

log1pexp :: Identity a -> Identity a #

log1mexp :: Identity a -> Identity a #

RealFloat a => RealFloat (Identity a)

Since: base-4.9.0.0

Instance details

Defined in GHC.Internal.Data.Functor.Identity

Methods

floatRadix :: Identity a -> Integer #

floatDigits :: Identity a -> Int #

floatRange :: Identity a -> (Int, Int) #

decodeFloat :: Identity a -> (Integer, Int) #

encodeFloat :: Integer -> Int -> Identity a #

exponent :: Identity a -> Int #

significand :: Identity a -> Identity a #

scaleFloat :: Int -> Identity a -> Identity a #

isNaN :: Identity a -> Bool #

isInfinite :: Identity a -> Bool #

isDenormalized :: Identity a -> Bool #

isNegativeZero :: Identity a -> Bool #

isIEEE :: Identity a -> Bool #

atan2 :: Identity a -> Identity a -> Identity a #

Storable a => Storable (Identity a)

Since: base-4.9.0.0

Instance details

Defined in GHC.Internal.Data.Functor.Identity

Methods

sizeOf :: Identity a -> Int #

alignment :: Identity a -> Int #

peekElemOff :: Ptr (Identity a) -> Int -> IO (Identity a) #

pokeElemOff :: Ptr (Identity a) -> Int -> Identity a -> IO () #

peekByteOff :: Ptr b -> Int -> IO (Identity a) #

pokeByteOff :: Ptr b -> Int -> Identity a -> IO () #

peek :: Ptr (Identity a) -> IO (Identity a) #

poke :: Ptr (Identity a) -> Identity a -> IO () #

Generic (Identity a)

Instance details

Defined in GHC.Internal.Data.Functor.Identity

Associated Types

type Rep (Identity a)	Since: base-4.8.0.0
Instance details Defined in GHC.Internal.Data.Functor.Identity type Rep (Identity a) = D1 ('MetaData "Identity" "GHC.Internal.Data.Functor.Identity" "ghc-internal" 'True) (C1 ('MetaCons "Identity" 'PrefixI 'True) (S1 ('MetaSel ('Just "runIdentity") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 a)))