type t = ('a, 'b) Core_kernel.Validated.tinclude Ppx_sexp_conv_lib.Sexpable.S with type t := t
val t_of_sexp : Sexplib0.Sexp.t -> tval sexp_of_t : t -> Sexplib0.Sexp.tval create : int -> t Core_kernel.Or_error.tval create_exn : int -> tval raw : t -> int