hashable: A class for types that can be converted to a hash value

[ bsd3, data, library ] [ Propose Tags ]

This package defines a class, Hashable, for types that can be converted to a hash value. This class exists for the benefit of hashing-based data structures. The package provides instances for basic types and a way to combine hash values.

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.


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Flags

Manual Flags

NameDescriptionDefault
arch-native

Use -march=native when compiling C sources. You may need to disable this flag if you are building distributable binaries

Enabled
random-initial-seed

Randomly initialize the initial seed on each final executable invocation This is useful for catching cases when you rely on (non-existent) stability of hashable's hash functions. This is not a security feature.

Disabled
Automatic Flags
NameDescriptionDefault
integer-gmp

Are we using integer-gmp to provide fast Integer instances? No effect on GHC-9.0 or later.

Enabled

Use -f <flag> to enable a flag, or -f -<flag> to disable that flag. More info

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For package maintainers and hackage trustees

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Versions [RSS] 1.0.0, 1.0.1.0, 1.0.1.1, 1.1.0.0, 1.1.1.0, 1.1.2.0, 1.1.2.1, 1.1.2.2, 1.1.2.3, 1.1.2.4, 1.1.2.5, 1.2.0.0, 1.2.0.1, 1.2.0.2, 1.2.0.3, 1.2.0.4, 1.2.0.5, 1.2.0.6, 1.2.0.7, 1.2.0.8, 1.2.0.9, 1.2.0.10, 1.2.1.0, 1.2.2.0, 1.2.3.0, 1.2.3.1, 1.2.3.2, 1.2.3.3, 1.2.4.0, 1.2.5.0, 1.2.6.0, 1.2.6.1, 1.2.7.0, 1.3.0.0, 1.3.1.0, 1.3.2.0, 1.3.3.0, 1.3.4.0, 1.3.4.1, 1.3.5.0, 1.4.0.0, 1.4.0.1, 1.4.0.2, 1.4.1.0, 1.4.2.0, 1.4.3.0, 1.4.4.0, 1.4.5.0, 1.4.6.0, 1.4.7.0, 1.5.0.0
Change log CHANGES.md
Dependencies base (>=4.12.0.0 && <4.21), base-orphans (>=0.8.6 && <0.10), bytestring (>=0.10.8.2 && <0.13), containers (>=0.6.0.1 && <0.8), data-array-byte (>=0.1.0.1 && <0.2), deepseq (>=1.4.4.0 && <1.6), filepath (>=1.4.1.2 && <1.6), ghc-bignum (>=1.0 && <1.4), ghc-bignum-orphans (>=0.1 && <0.2), ghc-prim, integer-gmp (>=0.4 && <1.1), integer-simple, os-string (>=2.0.2), text (>=1.2.3.0 && <1.3 || >=2.0 && <2.2) [details]
License BSD-3-Clause
Author Milan Straka <fox@ucw.cz> Johan Tibell <johan.tibell@gmail.com>
Maintainer Oleg Grenrus <oleg.grenrus@iki.fi>
Category Data
Home page http://github.com/haskell-unordered-containers/hashable
Bug tracker https://github.com/haskell-unordered-containers/hashable/issues
Source repo head: git clone https://github.com/haskell-unordered-containers/hashable.git
Uploaded by phadej at 2024-06-09T19:43:26Z
Distributions Arch:1.4.3.0, Debian:1.3.0.0, Fedora:1.4.2.0, FreeBSD:1.2.3.3, LTSHaskell:1.4.4.0, NixOS:1.4.4.0, Stackage:1.4.7.0, openSUSE:1.4.3.0
Reverse Dependencies 1071 direct, 13662 indirect [details]
Downloads 508669 total (1174 in the last 30 days)
Rating 1.5 (votes: 5) [estimated by Bayesian average]
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Status Docs uploaded by user
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Readme for hashable-1.4.6.0

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The hashable package

This package defines a class, Hashable, for types that can be converted to a hash value. This class exists for the benefit of hashing-based data structures. The package provides instances for basic types and a way to combine hash values.