Module type Hashtbl.HashedType

module type HashedType = sig  end
The input signature of the functor Hashtbl.Make.

type t 
The type of the hashtable keys.
val equal : t -> t -> bool
The equality predicate used to compare keys.
val hash : t -> int
A hashing function on keys. It must be such that if two keys are equal according to equal, then they have identical hash values as computed by hash. Examples: suitable (equal, hash) pairs for arbitrary key types include ((=), Hashtbl.hash) for comparing objects by structure, and ((==), Hashtbl.hash) for comparing objects by addresses (e.g. for mutable or cyclic keys).