(** $x \ge 0$ *)
type t = private float

(** Conversions *)

val of_float        : float -> t
(** Checks that the float is non-negative. *)

val unsafe_of_float : float -> t
(** Fast conversion without checking that the float is non-negative. *)

val to_float        : t -> float
val of_string       : string -> t
val to_string       : t -> string