package octez-libs

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Source file seq_s.ml

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(*****************************************************************************)
(*                                                                           *)
(* Open Source License                                                       *)
(* Copyright (c) 2020 Nomadic Labs <contact@nomadic-labs.com>                *)
(*                                                                           *)
(* Permission is hereby granted, free of charge, to any person obtaining a   *)
(* copy of this software and associated documentation files (the "Software"),*)
(* to deal in the Software without restriction, including without limitation *)
(* the rights to use, copy, modify, merge, publish, distribute, sublicense,  *)
(* and/or sell copies of the Software, and to permit persons to whom the     *)
(* Software is furnished to do so, subject to the following conditions:      *)
(*                                                                           *)
(* The above copyright notice and this permission notice shall be included   *)
(* in all copies or substantial portions of the Software.                    *)
(*                                                                           *)
(* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR*)
(* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,  *)
(* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL   *)
(* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER*)
(* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING   *)
(* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER       *)
(* DEALINGS IN THE SOFTWARE.                                                 *)
(*                                                                           *)
(*****************************************************************************)

(** The [S] signature is similar to [Seq.S] except that suspended nodes are
    wrapped in a promise.

    This allows some additional traversors to be applied lazily.

    The functions [of_seq] and [of_seq_s] allow conversion from vanilla
    sequences. *)
module type S = sig
  include
    Bare_sigs.Seq_s.S
      with type 'a node = 'a Bare_structs.Seq_s.node
       and type 'a t = 'a Bare_structs.Seq_s.t

  (** ['error trace] is intended to be substituted by a type provided by a
      [Trace] module ([with type 'error trace := 'error Trace.trace]) *)
  type 'error trace

  (** Similar to {!iter} but wraps the iteration in [result Lwt.t]. All the
      steps of the iteration are started concurrently. The promise [iter_ep]
      resolves once all the promises of the traversal resolve. At this point it
      is either:
      - rejected if at least one of the promises is, or
      - fulfilled with [Error _] if at least one of the promises is, or
      - fulfilled with [Ok ()] if all the promises are. *)
  val iter_ep :
    ('a -> (unit, 'error trace) result Lwt.t) ->
    'a t ->
    (unit, 'error trace) result Lwt.t
end
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