Module type Hashtbl.M_of_sexp

type t
val t_of_sexp : Sexp.t -> t
include Base__.Hashtbl_intf.Key with type t := t
type t
val compare : t -> t -> int
val sexp_of_t : t -> Sexp.t
val hash : t -> int

Two ts that compare equal must have equal hashes for the hashtable to behave properly.