# Module type Core_hashtbl_intf.Key

    module type Key = sig .. end

    type t

    val hash : t -> int

Values returned by `hash` must be non-negative. An exception will be raised in the case that `hash` returns a negative value.

    val t_of_sexp : Sexplib.Sexp.t -> t

    val sexp_of_t : t -> Sexplib.Sexp.t

    val compare : t -> t -> int

Values returned by `hash` must be non-negative. An exception will be raised in the case that `hash` returns a negative value.