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
- hashWithSalt :: Int -> a -> Int
- hash :: a -> Int

Documentation

class Hashable a where Source #

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

Minimal implementation: hashWithSalt.

Note: the hash is not guaranteed to be stable across library versions, operating systems or architectures. For stable hashing use named hashes: SHA256, CRC32 etc.

If you are looking for Hashable instance in time package, check time-compat

Minimal complete definition

Nothing

Methods

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

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.
hashWithSalt may return negative Int values.

hash :: a -> Int Source #

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

Instances details

Hashable Bool
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Bool -> Int Source # hash :: Bool -> Int Source #
Hashable Char
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Char -> Int Source # hash :: Char -> Int Source #
Hashable Double	Note: prior to `hashable-1.3.0.0`, `hash 0.0 /= hash (-0.0)` The `hash` of NaN is not well defined. Since: hashable-1.3.0.0
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Double -> Int Source # hash :: Double -> Int Source #
Hashable Float	Note: prior to `hashable-1.3.0.0`, `hash 0.0 /= hash (-0.0)` The `hash` of NaN is not well defined. Since: hashable-1.3.0.0
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Float -> Int Source # hash :: Float -> Int Source #
Hashable Int
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Int -> Int Source # hash :: Int -> Int Source #
Hashable Int8
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Int8 -> Int Source # hash :: Int8 -> Int Source #
Hashable Int16
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Int16 -> Int Source # hash :: Int16 -> Int Source #
Hashable Int32
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Int32 -> Int Source # hash :: Int32 -> Int Source #
Hashable Int64
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Int64 -> Int Source # hash :: Int64 -> Int Source #
Hashable Integer
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Integer -> Int Source # hash :: Integer -> Int Source #
Hashable Natural
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Natural -> Int Source # hash :: Natural -> Int Source #
Hashable Ordering
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Ordering -> Int Source # hash :: Ordering -> Int Source #
Hashable Word
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Word -> Int Source # hash :: Word -> Int Source #
Hashable Word8
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Word8 -> Int Source # hash :: Word8 -> Int Source #
Hashable Word16
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Word16 -> Int Source # hash :: Word16 -> Int Source #
Hashable Word32
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Word32 -> Int Source # hash :: Word32 -> Int Source #
Hashable Word64
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Word64 -> Int Source # hash :: Word64 -> Int Source #
Hashable SomeTypeRep
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> SomeTypeRep -> Int Source # hash :: SomeTypeRep -> Int Source #
Hashable ()
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> () -> Int Source # hash :: () -> Int Source #
Hashable BigNat
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> BigNat -> Int Source # hash :: BigNat -> Int Source #
Hashable Void
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Void -> Int Source # hash :: Void -> Int Source #
Hashable Unique
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Unique -> Int Source # hash :: Unique -> Int Source #
Hashable Version
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Version -> Int Source # hash :: Version -> Int Source #
Hashable ThreadId
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> ThreadId -> Int Source # hash :: ThreadId -> Int Source #
Hashable WordPtr
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> WordPtr -> Int Source # hash :: WordPtr -> Int Source #
Hashable IntPtr
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> IntPtr -> Int Source # hash :: IntPtr -> Int Source #
Hashable Fingerprint	Since: hashable-1.3.0.0
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Fingerprint -> Int Source # hash :: Fingerprint -> Int Source #
Hashable ShortByteString
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> ShortByteString -> Int Source # hash :: ShortByteString -> Int Source #
Hashable ByteString
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> ByteString -> Int Source # hash :: ByteString -> Int Source #
Hashable ByteString
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> ByteString -> Int Source # hash :: ByteString -> Int Source #
Hashable IntSet	Since: hashable-1.3.4.0
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> IntSet -> Int Source # hash :: IntSet -> Int Source #
Hashable Text
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Text -> Int Source # hash :: Text -> Int Source #
Hashable Text
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Text -> Int Source # hash :: Text -> Int Source #
Hashable ZonedTime Source #
Instance details Defined in Data.Hashable.Time Methods hashWithSalt :: Int -> ZonedTime -> Int Source # hash :: ZonedTime -> Int Source #
Hashable TimeLocale Source #
Instance details Defined in Data.Hashable.Time Methods hashWithSalt :: Int -> TimeLocale -> Int Source # hash :: TimeLocale -> Int Source #
Hashable LocalTime Source #
Instance details Defined in Data.Hashable.Time Methods hashWithSalt :: Int -> LocalTime -> Int Source # hash :: LocalTime -> Int Source #
Hashable TimeOfDay Source #
Instance details Defined in Data.Hashable.Time Methods hashWithSalt :: Int -> TimeOfDay -> Int Source # hash :: TimeOfDay -> Int Source #
Hashable TimeZone Source #
Instance details Defined in Data.Hashable.Time Methods hashWithSalt :: Int -> TimeZone -> Int Source # hash :: TimeZone -> Int Source #
Hashable UniversalTime Source #
Instance details Defined in Data.Hashable.Time Methods hashWithSalt :: Int -> UniversalTime -> Int Source # hash :: UniversalTime -> Int Source #
Hashable UTCTime Source #
Instance details Defined in Data.Hashable.Time Methods hashWithSalt :: Int -> UTCTime -> Int Source # hash :: UTCTime -> Int Source #
Hashable NominalDiffTime Source #
Instance details Defined in Data.Hashable.Time Methods hashWithSalt :: Int -> NominalDiffTime -> Int Source # hash :: NominalDiffTime -> Int Source #
Hashable DiffTime Source #
Instance details Defined in Data.Hashable.Time Methods hashWithSalt :: Int -> DiffTime -> Int Source # hash :: DiffTime -> Int Source #
Hashable Day Source #
Instance details Defined in Data.Hashable.Time Methods hashWithSalt :: Int -> Day -> Int Source # hash :: Day -> Int Source #
Hashable a => Hashable [a]
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> [a] -> Int Source # hash :: [a] -> Int Source #
Hashable a => Hashable (Maybe a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Maybe a -> Int Source # hash :: Maybe a -> Int Source #
Hashable a => Hashable (Ratio a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Ratio a -> Int Source # hash :: Ratio a -> Int Source #
Hashable (Ptr a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Ptr a -> Int Source # hash :: Ptr a -> Int Source #
Hashable (FunPtr a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> FunPtr a -> Int Source # hash :: FunPtr a -> Int Source #
Hashable a => Hashable (Complex a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Complex a -> Int Source # hash :: Complex a -> Int Source #
Hashable (Fixed a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Fixed a -> Int Source # hash :: Fixed a -> Int Source #
Hashable a => Hashable (Min a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Min a -> Int Source # hash :: Min a -> Int Source #
Hashable a => Hashable (Max a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Max a -> Int Source # hash :: Max a -> Int Source #
Hashable a => Hashable (First a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> First a -> Int Source # hash :: First a -> Int Source #
Hashable a => Hashable (Last a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Last a -> Int Source # hash :: Last a -> Int Source #
Hashable a => Hashable (WrappedMonoid a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> WrappedMonoid a -> Int Source # hash :: WrappedMonoid a -> Int Source #
Hashable a => Hashable (Option a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Option a -> Int Source # hash :: Option a -> Int Source #
Hashable (StableName a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> StableName a -> Int Source # hash :: StableName a -> Int Source #
Hashable a => Hashable (Identity a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Identity a -> Int Source # hash :: Identity a -> Int Source #
Hashable a => Hashable (NonEmpty a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> NonEmpty a -> Int Source # hash :: NonEmpty a -> Int Source #
Hashable v => Hashable (IntMap v)	Since: hashable-1.3.4.0
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> IntMap v -> Int Source # hash :: IntMap v -> Int Source #
Hashable v => Hashable (Tree v)	Since: hashable-1.3.4.0
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Tree v -> Int Source # hash :: Tree v -> Int Source #
Hashable v => Hashable (Seq v)	Since: hashable-1.3.4.0
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Seq v -> Int Source # hash :: Seq v -> Int Source #
Hashable v => Hashable (Set v)	Since: hashable-1.3.4.0
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Set v -> Int Source # hash :: Set v -> Int Source #
Hashable (Hashed a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Hashed a -> Int Source # hash :: Hashed a -> Int Source #
(Hashable a, Hashable b) => Hashable (Either a b)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Either a b -> Int Source # hash :: Either a b -> Int Source #
Hashable (TypeRep a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> TypeRep a -> Int Source # hash :: TypeRep a -> Int Source #
(Hashable a1, Hashable a2) => Hashable (a1, a2)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> (a1, a2) -> Int Source # hash :: (a1, a2) -> Int Source #
Hashable a => Hashable (Arg a b)	Note: Prior to `hashable-1.3.0.0` the hash computation included the second argument of `Arg` which wasn't consistent with its `Eq` instance. Since: hashable-1.3.0.0
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Arg a b -> Int Source # hash :: Arg a b -> Int Source #
Hashable (Proxy a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Proxy a -> Int Source # hash :: Proxy a -> Int Source #
(Hashable k, Hashable v) => Hashable (Map k v)	Since: hashable-1.3.4.0
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Map k v -> Int Source # hash :: Map k v -> Int Source #
(Hashable a1, Hashable a2, Hashable a3) => Hashable (a1, a2, a3)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> (a1, a2, a3) -> Int Source # hash :: (a1, a2, a3) -> Int Source #
Hashable a => Hashable (Const a b)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Const a b -> Int Source # hash :: Const a b -> Int Source #
(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 Source # hash :: (a1, a2, a3, a4) -> Int Source #
(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 Source # hash :: Product f g a -> Int Source #
(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 Source # hash :: Sum f g a -> Int Source #
(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 Source # hash :: (a1, a2, a3, a4, a5) -> Int Source #
(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 Source # hash :: Compose f g a -> Int Source #
(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 Source # hash :: (a1, a2, a3, a4, a5, a6) -> Int Source #
(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 Source # hash :: (a1, a2, a3, a4, a5, a6, a7) -> Int Source #

Orphan instances

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