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(* Open Source License                                                       *)
(* Copyright (c) 2022 Nomadic Labs <contact@nomadic-labs.com>                *)
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(** A bitset is a compact structure to store a set of integers. *)
type t

type error += Invalid_position of int

val encoding : t Data_encoding.t

(** A bitset encoding the empty set. *)
val empty : t

(** [mem field i] returns [true] iff [i] has been added in [field].

    This functions returns [Invalid_input i] if [i] is negative. *)
val mem : t -> int -> bool tzresult

(** [add field i] returns a new bitset which contains [i] in
    addition to the previous integers of [field].

    This functions returns [Invalid_input i] if [i] is negative. *)
val add : t -> int -> t tzresult