The signature for a type that can be compared and hashed
type t
val equal : t ‑> t ‑> Ppx_deriving_runtime.bool
include sig ... end
val t_of_sexp : Ppx_sexp_conv_lib.Sexp.t ‑> t
val sexp_of_t : t ‑> Ppx_sexp_conv_lib.Sexp.t
val compare : t ‑> t ‑> int
val hash_fold_t : Ppx_hash_lib.Std.Hash.state ‑> t ‑> Ppx_hash_lib.Std.Hash.state
val hash : t ‑> Ppx_hash_lib.Std.Hash.hash_value
val to_string : t ‑> string