Changelog for hashable-1.4.7.0

Version 1.4.7.0

Make arch-native disabled by default.

Version 1.4.6.0

Use GND&DerivingVia to derive newtype intances (Data.Semigroup, Data.Monoid, Identity etc).

Version 1.4.5.0

Drop support for GHCs prior 8.6.5
Use xxhash for hashing bytestrings and bytearrays. Note: when compiling binaries for distribution, you may need to disable arch-native flag.

Version 1.4.4.0

Depend on os-string-2 for GHC-9.2+
Support filepath-1.5

Version 1.4.3.0

Export defaultHashWithSalt and defaultHash.
Fix issue of tuples with 0 first component causing all-zero state.
Change hashInt to mix bits more.

Version 1.4.2.0

Fix the foreign signature of getThreadId https://github.com/haskell-unordered-containers/hashable/pull/263
Drop support for GHCs prior GHC-8.2 The recent unordered-containers releases support only GHC-8.2+
Add instance for OsString, PosixString, WindowsString from filepath-1.4.100.1
Add Hashable ByteArray instance using data-array-byte compat package

Version 1.4.1.0

Add instance for Data.Array.Byte.ByteArray.

Version 1.4.0.2

Restore older GHC support
Support GHC-9.0.2

Version 1.4.0.1

text-2.0 compatibility

Version 1.4.0.0

Eq is now a superclass of Hashable. Also Eq1 is a superclass of Hashable1 and Eq2 is a superclass of Hashable2 when exists.
Remove Hashable1 Fixed instance
Remove Hashable1 Semi.Min/Max/... instances as they don't have Eq1 instance.

Version 1.3.5.0

Add Solo instance (base-4.15+, GHC-9+)

Version 1.3.4.1

Fix compilation on 32 bit platforms
Fix Tree instance

Version 1.3.4.0

Text and ByteString hashes include length. This fixes a variant of https://github.com/haskell-unordered-containers/hashable/issues/74 for texts and bytestrings. https://github.com/haskell-unordered-containers/hashable/pull/223
Use correct prime in combine. This should improve the hash quality of compound structures on 64bit systems. https://github.com/haskell-unordered-containers/hashable/pull/224
Add instance for types in containers package https://github.com/haskell-unordered-containers/hashable/pull/226
Change Int, Int64 and Word64 hashWithSalt slightly. https://github.com/haskell-unordered-containers/hashable/pull/227

Version 1.3.3.0

Text hashing uses 64-bit FNV prime
Don't truncate Text hashvalues on 64bit Windows: https://github.com/haskell-unordered-containers/hashable/pull/211

Version 1.3.2.0

Add Hashable (Fixed a) for base <4.7 versions.
Add documentation:
- hashable is not a stable hash
- hashWithSalt may return negative values
- there is time-compat with Hashable instances for time types.
Add random-initial-seed flag causing the initial seed to be randomized on each start of an executable using hashable.

Version 1.3.1.0

Add Hashable1 instances to semigroups types.
Use ghc-bignum with GHC-9.0
Use FNV-1 constants.
Make hashable-examples a test-suite

Version 1.3.0.0

Semantic change of Hashable Arg instance to not hash the second argument of Arg in order to be consistent with Eq Arg (#171)
Semantic change of Hashable Float and Hashable Double instances to hash -0.0 and 0.0 to the same value (#173)
Add Hashable instance for Fingerprint (#156)
Add new Data.Hashable.Generic module providing the default implementations genericHashWithSalt and genericLiftHashWithSalt together with other Generics support helpers (#148, #178)
Bump minimum version requirement of base to base-4.5 (i.e. GHC >= 7.4)

Version 1.2.7.0

Add Hashable and Hashable1 instances for Complex
Fix undefined behavior in hashable_fn_hash() implementation due to signed integer overflow (#152)
Mark Data.Hashable.Lifted as Trustworthy (re SafeHaskell)
Support GHC 8.4

Version 1.2.6.1

Use typeRepFingerprint from Type.Reflection.Unsafe
Bump minimum version of base to 4.4.

Version 1.2.6.0

Add support for type-indexed Typeable.
Rework the Generic hashable for sums.

Version 1.2.5.0

Add Hashable1 and Hashable2
Add instances for: Eq1, Ord1, Show1, Ptr, FunPtr, IntPtr, WordPtr
Add Hashed type for caching the hash function result.

Version 1.2.4.0

Add instances for: Unique, Version, Fixed, NonEmpty, Min, Max, Arg, First, Last, WrappedMonoid, Option
Support GHC 8.0

Version 1.2.3.3

Support integer-simple.

Version 1.2.3.2

Add support for GHC 7.10 typeRepFingerprint

Version 1.2.3.1

Added support for random 1.1.*.

Version 1.2.3.0

Silence integer literal overflow warning
Add support for GHC 7.10 integer-gmp2 & Natural
Add instance for Data.Void
Make the SSE .cabal flags manual
Add an upper bound on bytestring

Version 1.2.2.0

Add instances for Data.ByteString.Short
Use a 32-bit default salt on 32-bit archs.

Version 1.2.1.0

Revert instances to their 1.1 implementations to regain the performance we had then.
Remove use of random salt altogether. Without using SipHash the benefit is unclear (i.e. collision attacks still work) and the complexity is no longer worth it.
Documentation improvements.

Version 1.2.0.10

Fix for GHC 7.0.

Version 1.2.0.9

Stop using SipHash. The current implementation still has segfault causing bugs that we won't be able to fix soon.
Stop using Wang hash. It degrades performance of fixed-size integer hashing too much.

Version 1.2.0.8

Fix linking issue when SSE was disabled.
Hash small signed Integers correctly.

Version 1.2.0.7

Add flags to control usage of SSE.

Version 1.2.0.6

Fix another segfault caused by SSE2 code.

Version 1.2.0.5

More portability fixes.
Force stack alignment to 16 bytes everywhere. Fixes a segfault.
Fix bug where code relied on rewrite rules firing for correctness.

Version 1.2.0.4

Update docs to match code.
Work around bug in GHCi runtime linker, which never call static initializers.

Version 1.2.0.3

Make building of SSE 4.1 code conditional, as it doesn't work on all platforms.
Use a fixed salt, but allow random salting. Random salting by default broke people's code.

Version 1.2.0.2

Work around ghci linker bug on Windows.

Version 1.2.0.1

Fix performance bug in SSE implementation of SipHash.
Fix segfault due to incorrect stack alignment on Windows.

Version 1.2.0.0

Switch string hashing from FNV-1 to SipHash, in an effort to prevent collision attacks.
Switch fixed-size integer hashing to Wang hash.
The default salt now switched on every program run, in an effort to prevent collision attacks.
Move hash method out of Hashable type class.
Add support for generic instance deriving.
Add instance for Ordering.

Version 1.1.2.5

Bug fix for bytestring < 0.10.0.

Version 1.1.2.4

Switch string hashing from Bernstein to FNV-1
Faster instance for Integer.
Update dependency on base, ghc-prim
Now works with GHC 7.6.

Version 1.1.2.3

Add instance for TypeRep.
Update dependency on test-framework.

Version 1.1.2.2

Bug fix for GHC 7.4

Version 1.1.2.1

Update dependency on test-framework.
Improve documentation of combine.

Version 1.1.2.0

Fix hash collision issues for lists and tuples when using a user-specified salt.
Add instances for Integer, Ratio, Float, Double, and StableName.
Improved instances for tuples and lists.

Version 1.1.1.0

Add hashWithSalt, which allows the user to create different hash values for the same input by providing different seeds. This is useful for application like Cuckoo hashing which need a family of hash functions.
Fix a bug in the Hashable instance for Int64/Word64 on 32-bit platforms.
Improved resilience to leading zero in the input being hashed.

Version 1.1.0.0

Add instance for: strict and lazy Texts, ThreadId
Add hashPtrWithSalt and hashByteArrayWithSalt.
Faster ByteArray# hashing.
Fix a signedness bug that affected ByteString.
Fix ByteString hashing to work correctly on both 32 and 64-bit platforms.

Version 1.0.1.1

Fix bug in Hashable instance for lazy ByteStrings where differences in the internal structure of the ByteString could cause different hash values for ByteStrings that are equal according to ==.

Version 1.0.1.0

Add two helpers for creating Hashable instances: hashPtr and hashByteArray.

Version 1.0.0

Separate Hashable class to its own package from hashmap 1.0.0.3.