haskell-hashable (A class for types that can be converted to a hash)

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

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.

https://hackage.haskell.org/package/hashable