ghc-hashable

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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