Safe Haskell	Safe-Inferred
Language	Haskell2010

Ouroboros.Network.Hashable

Synopsis

class Eq a => Hashable a
data Salt
mkSalt :: RandomGen g => g -> (Salt, g)
mkSaltIO :: IO Salt
mkUnsafeSalt :: Int -> Salt
hashWithSalt :: Hashable a => Salt -> a -> Int

Documentation

class Eq a => Hashable a #

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

Minimal implementation: hashWithSalt.

Hashable is intended exclusively for use in in-memory data structures. . Hashable does not have a fixed standard. This allows it to improve over time. . Because it does not have a fixed standard, different computers or computers on different versions of the code will observe different hash values. As such, Hashable is not recommended for use other than in-memory datastructures. Specifically, Hashable is not intended for network use or in applications which persist hashed values. For stable hashing use named hashes: sha256, crc32, xxhash etc.

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

Instances

Instances details

Hashable Value
Instance details Defined in Data.Aeson.Types.Internal Methods hashWithSalt :: Int -> Value -> Int # hash :: Value -> Int #
Hashable ByteArray	This instance was available since 1.4.1.0 only for GHC-9.4+ Since: hashable-1.4.2.0
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> ByteArray -> Int # hash :: ByteArray -> 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 ShortByteString
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> ShortByteString -> Int # hash :: ShortByteString -> Int #
Hashable IntSet	Since: hashable-1.3.4.0
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> IntSet -> Int # hash :: IntSet -> 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 ThreadId
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> ThreadId -> Int # hash :: ThreadId -> Int #
Hashable SomeTypeRep
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> SomeTypeRep -> Int # hash :: SomeTypeRep -> 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 Fingerprint	Since: hashable-1.3.0.0
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Fingerprint -> Int # hash :: Fingerprint -> Int #
Hashable IntPtr
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> IntPtr -> Int # hash :: IntPtr -> Int #
Hashable WordPtr
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> WordPtr -> Int # hash :: WordPtr -> 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 Int8
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Int8 -> Int # hash :: Int8 -> 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 Word8
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Word8 -> Int # hash :: Word8 -> Int #
Hashable Ordering
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Ordering -> Int # hash :: Ordering -> Int #
Hashable IOSimThreadId
Instance details Defined in Control.Monad.IOSim.CommonTypes Methods hashWithSalt :: Int -> IOSimThreadId -> Int # hash :: IOSimThreadId -> Int #
Hashable SockAddr Source #
Instance details Defined in Ouroboros.Network.Socket Methods hashWithSalt :: Int -> SockAddr -> Int # hash :: SockAddr -> Int #
Hashable OsString	Since: hashable-1.4.2.0
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> OsString -> Int # hash :: OsString -> Int #
Hashable PosixString	Since: hashable-1.4.2.0
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> PosixString -> Int # hash :: PosixString -> Int #
Hashable WindowsString	Since: hashable-1.4.2.0
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> WindowsString -> Int # hash :: WindowsString -> Int #
Hashable LocalAddress Source #
Instance details Defined in Ouroboros.Network.Snocket Methods hashWithSalt :: Int -> LocalAddress -> Int # hash :: LocalAddress -> Int #
Hashable Scientific	A hash can be safely calculated from a `Scientific`. No magnitude `10^e` is calculated so there's no risk of a blowup in space or time when hashing scientific numbers coming from untrusted sources. `>>>` `import Data.Hashable (hash)``>>>` `let x = scientific 1 2``>>>` `let y = scientific 100 0``>>>` `(x == y, hash x == hash y)`(True,True)
Instance details Defined in Data.Scientific Methods hashWithSalt :: Int -> Scientific -> Int # hash :: Scientific -> 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 ShortText
Instance details Defined in Data.Text.Short.Internal Methods hashWithSalt :: Int -> ShortText -> Int # hash :: ShortText -> Int #
Hashable Day
Instance details Defined in Data.Time.Orphans Methods hashWithSalt :: Int -> Day -> Int # hash :: Day -> Int #
Hashable Month
Instance details Defined in Data.Time.Orphans Methods hashWithSalt :: Int -> Month -> Int # hash :: Month -> Int #
Hashable Quarter
Instance details Defined in Data.Time.Orphans Methods hashWithSalt :: Int -> Quarter -> Int # hash :: Quarter -> Int #
Hashable QuarterOfYear
Instance details Defined in Data.Time.Orphans Methods hashWithSalt :: Int -> QuarterOfYear -> Int # hash :: QuarterOfYear -> Int #
Hashable DayOfWeek
Instance details Defined in Data.Time.Orphans Methods hashWithSalt :: Int -> DayOfWeek -> Int # hash :: DayOfWeek -> Int #
Hashable DiffTime
Instance details Defined in Data.Time.Orphans Methods hashWithSalt :: Int -> DiffTime -> Int # hash :: DiffTime -> Int #
Hashable NominalDiffTime
Instance details Defined in Data.Time.Orphans Methods hashWithSalt :: Int -> NominalDiffTime -> Int # hash :: NominalDiffTime -> Int #
Hashable UTCTime
Instance details Defined in Data.Time.Orphans Methods hashWithSalt :: Int -> UTCTime -> Int # hash :: UTCTime -> Int #
Hashable UniversalTime
Instance details Defined in Data.Time.Orphans Methods hashWithSalt :: Int -> UniversalTime -> Int # hash :: UniversalTime -> Int #
Hashable TimeLocale
Instance details Defined in Data.Time.Orphans Methods hashWithSalt :: Int -> TimeLocale -> Int # hash :: TimeLocale -> Int #
Hashable LocalTime
Instance details Defined in Data.Time.Orphans Methods hashWithSalt :: Int -> LocalTime -> Int # hash :: LocalTime -> Int #
Hashable TimeOfDay
Instance details Defined in Data.Time.Orphans Methods hashWithSalt :: Int -> TimeOfDay -> Int # hash :: TimeOfDay -> Int #
Hashable TimeZone
Instance details Defined in Data.Time.Orphans Methods hashWithSalt :: Int -> TimeZone -> Int # hash :: TimeZone -> Int #
Hashable UUID
Instance details Defined in Data.UUID.Types.Internal Methods hashWithSalt :: Int -> UUID -> Int # hash :: UUID -> 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 ()
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> () -> Int # hash :: () -> Int #
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	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 # hash :: Double -> Int #
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 # hash :: Float -> Int #
Hashable Int
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Int -> Int # hash :: Int -> Int #
Hashable Word
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Word -> Int # hash :: Word -> Int #
Hashable v => Hashable (KeyMap v)
Instance details Defined in Data.Aeson.KeyMap Methods hashWithSalt :: Int -> KeyMap v -> Int # hash :: KeyMap v -> Int #
Hashable (Async a)
Instance details Defined in Control.Concurrent.Async.Internal Methods hashWithSalt :: Int -> Async a -> Int # hash :: Async 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 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 (Max a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Max a -> Int # hash :: Max 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 (WrappedMonoid a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> WrappedMonoid a -> Int # hash :: WrappedMonoid a -> Int #
Hashable v => Hashable (IntMap v)	Since: hashable-1.3.4.0
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> IntMap v -> Int # hash :: IntMap v -> Int #
Hashable v => Hashable (Seq v)	Since: hashable-1.3.4.0
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Seq v -> Int # hash :: Seq v -> Int #
Hashable v => Hashable (Set v)	Since: hashable-1.3.4.0
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Set v -> Int # hash :: Set v -> Int #
Hashable v => Hashable (Tree v)	Since: hashable-1.3.4.0
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Tree v -> Int # hash :: Tree v -> Int #
Hashable1 f => Hashable (Fix f)
Instance details Defined in Data.Fix Methods hashWithSalt :: Int -> Fix f -> Int # hash :: Fix f -> Int #
Hashable a => Hashable (NonEmpty a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> NonEmpty a -> Int # hash :: NonEmpty 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 (Down a)
Instance details Defined in Control.Monad.IOSimPOR.Internal Methods hashWithSalt :: Int -> Down a -> Int # hash :: Down a -> Int #
Hashable (FunPtr a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> FunPtr a -> Int # hash :: FunPtr a -> Int #
Hashable (Ptr a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Ptr a -> Int # hash :: Ptr 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 (StableName a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> StableName a -> Int # hash :: StableName a -> Int #
Eq a => Hashable (Hashed a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Hashed a -> Int # hash :: Hashed a -> Int #
Hashable a => Hashable (ConnectionId a) Source #
Instance details Defined in Ouroboros.Network.ConnectionId Methods hashWithSalt :: Int -> ConnectionId a -> Int # hash :: ConnectionId a -> Int #
Hashable addr => Hashable (TestAddress addr) Source #
Instance details Defined in Ouroboros.Network.Snocket Methods hashWithSalt :: Int -> TestAddress addr -> Int # hash :: TestAddress addr -> Int #
Hashable a => Hashable (Maybe a)
Instance details Defined in Data.Strict.Maybe Methods hashWithSalt :: Int -> Maybe a -> Int # hash :: Maybe a -> Int #
Hashable a => Hashable (HashSet a)
Instance details Defined in Data.HashSet.Internal Methods hashWithSalt :: Int -> HashSet a -> Int # hash :: HashSet 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 (Solo a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Solo a -> Int # hash :: Solo a -> Int #
Hashable a => Hashable [a]
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> [a] -> Int # hash :: [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 (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-1.5.0.0`, `hash (Semi.arg a _) = hash a` Since: hashable-1.3.0.0
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Arg a b -> Int # hash :: Arg a b -> Int #
(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 # hash :: Map k v -> 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 (Proxy a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Proxy a -> Int # hash :: Proxy a -> Int #
Hashable (TypeRep a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> TypeRep a -> Int # hash :: TypeRep a -> Int #
(Hashable a, Hashable b) => Hashable (Either a b)
Instance details Defined in Data.Strict.Either Methods hashWithSalt :: Int -> Either a b -> Int # hash :: Either a b -> Int #
(Hashable a, Hashable b) => Hashable (These a b)
Instance details Defined in Data.Strict.These Methods hashWithSalt :: Int -> These a b -> Int # hash :: These a b -> Int #
(Hashable a, Hashable b) => Hashable (Pair a b)
Instance details Defined in Data.Strict.Tuple Methods hashWithSalt :: Int -> Pair a b -> Int # hash :: Pair a b -> Int #
(Hashable a, Hashable b) => Hashable (These a b)
Instance details Defined in Data.These Methods hashWithSalt :: Int -> These a b -> Int # hash :: These a b -> Int #
(Hashable k, Hashable v) => Hashable (HashMap k v)
Instance details Defined in Data.HashMap.Internal Methods hashWithSalt :: Int -> HashMap k v -> Int # hash :: HashMap k v -> 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 (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 (a1, a2, a3)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> (a1, a2, a3) -> Int # hash :: (a1, a2, a3) -> Int #
(Hashable (f a), Hashable (g 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 #
(Hashable (f a), Hashable (g 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 (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 #
Hashable (f (g a)) => Hashable (Compose f g a)
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 (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 #
(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 #

data Salt Source #

Instances

Instances details

Show Salt Source #
Instance details Defined in Ouroboros.Network.Hashable Methods showsPrec :: Int -> Salt -> ShowS # show :: Salt -> String # showList :: [Salt] -> ShowS #

mkSalt :: RandomGen g => g -> (Salt, g) Source #

Salt can be constructed from a random generator.

mkSaltIO :: IO Salt Source #

Generate a new Salt in IO monad.

mkUnsafeSalt :: Int -> Salt Source #

Unsafe constructor, should only be used in tests.

hashWithSalt :: Hashable a => Salt -> a -> Int Source #