License	BSD3
Maintainer	Alexey Karakulov <ankarakulov@gmail.com>
Safe Haskell	Safe
Language	Haskell2010

Data.Hashable.Time

Contents

Orphan instances

Description

Synopsis

class Hashable a where

Documentation

class Hashable a where #

The class of types that can be converted to a hash value.

Minimal implementation: hashWithSalt.

Methods

hashWithSalt :: Int -> a -> Int infixl 0 #

Return a hash value for the argument, using the given salt.

The general contract of hashWithSalt is:

If two values are equal according to the == method, then applying the hashWithSalt method on each of the two values must produce the same integer result if the same salt is used in each case.
It is not required that if two values are unequal according to the == method, then applying the hashWithSalt method on each of the two values must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal values may improve the performance of hashing-based data structures.
This method can be used to compute different hash values for the same input by providing a different salt in each application of the method. This implies that any instance that defines hashWithSalt must make use of the salt in its implementation.

hash :: a -> Int #

Like hashWithSalt, but no salt is used. The default implementation uses hashWithSalt with some default salt. Instances might want to implement this method to provide a more efficient implementation than the default implementation.

Instances

Hashable Bool
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Bool -> Int # hash :: Bool -> Int #
Hashable Char
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Char -> Int # hash :: Char -> Int #
Hashable Double
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Double -> Int # hash :: Double -> Int #
Hashable Float
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Float -> Int # hash :: Float -> Int #
Hashable Int
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Int -> Int # hash :: Int -> Int #
Hashable Int8
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Int8 -> Int # hash :: Int8 -> Int #
Hashable Int16
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Int16 -> Int # hash :: Int16 -> Int #
Hashable Int32
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Int32 -> Int # hash :: Int32 -> Int #
Hashable Int64
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Int64 -> Int # hash :: Int64 -> Int #
Hashable Integer
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Integer -> Int # hash :: Integer -> Int #
Hashable Natural
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Natural -> Int # hash :: Natural -> Int #
Hashable Ordering
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Ordering -> Int # hash :: Ordering -> Int #
Hashable Word
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Word -> Int # hash :: Word -> Int #
Hashable Word8
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Word8 -> Int # hash :: Word8 -> Int #
Hashable Word16
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Word16 -> Int # hash :: Word16 -> Int #
Hashable Word32
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Word32 -> Int # hash :: Word32 -> Int #
Hashable Word64
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Word64 -> Int # hash :: Word64 -> Int #
Hashable SomeTypeRep
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> SomeTypeRep -> Int # hash :: SomeTypeRep -> Int #
Hashable ()
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> () -> Int # hash :: () -> Int #
Hashable BigNat
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> BigNat -> Int # hash :: BigNat -> Int #
Hashable Void
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Void -> Int # hash :: Void -> Int #
Hashable Unique
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Unique -> Int # hash :: Unique -> Int #
Hashable Version
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Version -> Int # hash :: Version -> Int #
Hashable ThreadId
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> ThreadId -> Int # hash :: ThreadId -> Int #
Hashable WordPtr
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> WordPtr -> Int # hash :: WordPtr -> Int #
Hashable IntPtr
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> IntPtr -> Int # hash :: IntPtr -> Int #
Hashable ShortByteString
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> ShortByteString -> Int # hash :: ShortByteString -> Int #
Hashable ByteString
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> ByteString -> Int # hash :: ByteString -> Int #
Hashable ByteString
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> ByteString -> Int # hash :: ByteString -> Int #
Hashable Text
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Text -> Int # hash :: Text -> Int #
Hashable Text
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Text -> Int # hash :: Text -> Int #
Hashable ZonedTime #
Instance details Defined in Data.Hashable.Time Methods hashWithSalt :: Int -> ZonedTime -> Int # hash :: ZonedTime -> Int #
Hashable TimeLocale #
Instance details Defined in Data.Hashable.Time Methods hashWithSalt :: Int -> TimeLocale -> Int # hash :: TimeLocale -> Int #
Hashable LocalTime #
Instance details Defined in Data.Hashable.Time Methods hashWithSalt :: Int -> LocalTime -> Int # hash :: LocalTime -> Int #
Hashable TimeOfDay #
Instance details Defined in Data.Hashable.Time Methods hashWithSalt :: Int -> TimeOfDay -> Int # hash :: TimeOfDay -> Int #
Hashable TimeZone #
Instance details Defined in Data.Hashable.Time Methods hashWithSalt :: Int -> TimeZone -> Int # hash :: TimeZone -> Int #
Hashable UniversalTime #
Instance details Defined in Data.Hashable.Time Methods hashWithSalt :: Int -> UniversalTime -> Int # hash :: UniversalTime -> Int #
Hashable UTCTime #
Instance details Defined in Data.Hashable.Time Methods hashWithSalt :: Int -> UTCTime -> Int # hash :: UTCTime -> Int #
Hashable NominalDiffTime #
Instance details Defined in Data.Hashable.Time Methods hashWithSalt :: Int -> NominalDiffTime -> Int # hash :: NominalDiffTime -> Int #
Hashable DiffTime #
Instance details Defined in Data.Hashable.Time Methods hashWithSalt :: Int -> DiffTime -> Int # hash :: DiffTime -> Int #
Hashable Day #
Instance details Defined in Data.Hashable.Time Methods hashWithSalt :: Int -> Day -> Int # hash :: Day -> Int #
Hashable a => Hashable [a]
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> [a] -> Int # hash :: [a] -> Int #
Hashable a => Hashable (Maybe a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Maybe a -> Int # hash :: Maybe a -> Int #
Hashable a => Hashable (Ratio a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Ratio a -> Int # hash :: Ratio a -> Int #
Hashable (Ptr a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Ptr a -> Int # hash :: Ptr a -> Int #
Hashable (FunPtr a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> FunPtr a -> Int # hash :: FunPtr a -> Int #
Hashable a => Hashable (Complex a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Complex a -> Int # hash :: Complex a -> Int #
Hashable (Fixed a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Fixed a -> Int # hash :: Fixed a -> Int #
Hashable a => Hashable (Min a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Min a -> Int # hash :: Min a -> Int #
Hashable a => Hashable (Max a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Max a -> Int # hash :: Max a -> Int #
Hashable a => Hashable (First a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> First a -> Int # hash :: First a -> Int #
Hashable a => Hashable (Last a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Last a -> Int # hash :: Last a -> Int #
Hashable a => Hashable (WrappedMonoid a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> WrappedMonoid a -> Int # hash :: WrappedMonoid a -> Int #
Hashable a => Hashable (Option a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Option a -> Int # hash :: Option a -> Int #
Hashable (StableName a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> StableName a -> Int # hash :: StableName a -> Int #
Hashable a => Hashable (Identity a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Identity a -> Int # hash :: Identity a -> Int #
Hashable a => Hashable (NonEmpty a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> NonEmpty a -> Int # hash :: NonEmpty a -> Int #
Hashable (Hashed a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Hashed a -> Int # hash :: Hashed a -> Int #
(Hashable a, Hashable b) => Hashable (Either a b)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Either a b -> Int # hash :: Either a b -> Int #
Hashable (TypeRep a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> TypeRep a -> Int # hash :: TypeRep a -> Int #
(Hashable a1, Hashable a2) => Hashable (a1, a2)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> (a1, a2) -> Int # hash :: (a1, a2) -> Int #
(Hashable a, Hashable b) => Hashable (Arg a b)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Arg a b -> Int # hash :: Arg a b -> Int #
Hashable (Proxy a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Proxy a -> Int # hash :: Proxy a -> Int #
(Hashable a1, Hashable a2, Hashable a3) => Hashable (a1, a2, a3)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> (a1, a2, a3) -> Int # hash :: (a1, a2, a3) -> Int #
Hashable a => Hashable (Const a b)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Const a b -> Int # hash :: Const a b -> Int #
(Hashable a1, Hashable a2, Hashable a3, Hashable a4) => Hashable (a1, a2, a3, a4)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> (a1, a2, a3, a4) -> Int # hash :: (a1, a2, a3, a4) -> Int #
(Hashable1 f, Hashable1 g, Hashable a) => Hashable (Product f g a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Product f g a -> Int # hash :: Product f g a -> Int #
(Hashable1 f, Hashable1 g, Hashable a) => Hashable (Sum f g a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Sum f g a -> Int # hash :: Sum f g a -> Int #
(Hashable a1, Hashable a2, Hashable a3, Hashable a4, Hashable a5) => Hashable (a1, a2, a3, a4, a5)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> (a1, a2, a3, a4, a5) -> Int # hash :: (a1, a2, a3, a4, a5) -> Int #
(Hashable1 f, Hashable1 g, Hashable a) => Hashable (Compose f g a)	In general, `hash (Compose x) ≠ hash x`. However, `hashWithSalt` satisfies its variant of this equivalence.
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Compose f g a -> Int # hash :: Compose f g a -> Int #
(Hashable a1, Hashable a2, Hashable a3, Hashable a4, Hashable a5, Hashable a6) => Hashable (a1, a2, a3, a4, a5, a6)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> (a1, a2, a3, a4, a5, a6) -> Int # hash :: (a1, a2, a3, a4, a5, a6) -> Int #
(Hashable a1, Hashable a2, Hashable a3, Hashable a4, Hashable a5, Hashable a6, Hashable a7) => Hashable (a1, a2, a3, a4, a5, a6, a7)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> (a1, a2, a3, a4, a5, a6, a7) -> Int # hash :: (a1, a2, a3, a4, a5, a6, a7) -> Int #

Orphan instances

Hashable ZonedTime Source #
Instance details Methods hashWithSalt :: Int -> ZonedTime -> Int # hash :: ZonedTime -> Int #
Hashable TimeLocale Source #
Instance details Methods hashWithSalt :: Int -> TimeLocale -> Int # hash :: TimeLocale -> Int #
Hashable LocalTime Source #
Instance details Methods hashWithSalt :: Int -> LocalTime -> Int # hash :: LocalTime -> Int #
Hashable TimeOfDay Source #
Instance details Methods hashWithSalt :: Int -> TimeOfDay -> Int # hash :: TimeOfDay -> Int #
Hashable TimeZone Source #
Instance details Methods hashWithSalt :: Int -> TimeZone -> Int # hash :: TimeZone -> Int #
Hashable UniversalTime Source #
Instance details Methods hashWithSalt :: Int -> UniversalTime -> Int # hash :: UniversalTime -> Int #
Hashable UTCTime Source #
Instance details Methods hashWithSalt :: Int -> UTCTime -> Int # hash :: UTCTime -> Int #
Hashable NominalDiffTime Source #
Instance details Methods hashWithSalt :: Int -> NominalDiffTime -> Int # hash :: NominalDiffTime -> Int #
Hashable DiffTime Source #
Instance details Methods hashWithSalt :: Int -> DiffTime -> Int # hash :: DiffTime -> Int #
Hashable Day Source #
Instance details Methods hashWithSalt :: Int -> Day -> Int # hash :: Day -> Int #