Source file `seq.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.                                                 *)
(*                                                                           *)
(*****************************************************************************)

module Make (Monad : Traced_sigs.Monad.S) :
  Traced_sigs.Seq.S with type 'error trace := 'error Monad.trace = struct
  include Bare_structs.Seq

  let iter_ep f seq =
    let rec iter_ep f seq acc =
      match seq () with
      | Nil -> Monad.Lwt_traced_result_syntax.join acc
      | Cons (item, seq) -> iter_ep f seq (Lwt.apply f item :: acc)
    in
    iter_ep f seq []

  let iteri_ep f seq =
    let rec iteri_ep f i seq (acc : (unit, 'error) result Lwt.t list) =
      match seq () with
      | Nil -> Monad.Lwt_traced_result_syntax.join acc
      | Cons (item, seq) ->
          iteri_ep f (i + 1) seq (Bare_structs.Monad.lwt_apply2 f i item :: acc)
    in
    iteri_ep f 0 seq []

  let iter2_ep f seqa seqb =
    let rec iter2_ep f seqa seqb (acc : (unit, 'error) result Lwt.t list) =
      let a = seqa () in
      let b = seqb () in
      match (a, b) with
      | Nil, Nil | Nil, Cons _ | Cons _, Nil ->
          Monad.Lwt_traced_result_syntax.join acc
      | Cons (itema, seqa), Cons (itemb, seqb) ->
          iter2_ep
            f
            seqa
            seqb
            (Bare_structs.Monad.lwt_apply2 f itema itemb :: acc)
    in
    iter2_ep f seqa seqb []
end