S-expressions contain at most 8 significant digits.
type t
= t
include sig ... end
val t_of_sexp : Base.Sexp.t ‑> t
val sexp_of_t : t ‑> Base.Sexp.t
include Base.Stringable.S with type t := t
val of_string : string ‑> t
val to_string : t ‑> string