(*****************************************************************************)
(*                                                                           *)
(* Open Source License                                                       *)
(* Copyright (c) 2022 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,  *)
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(* Software is furnished to do so, subject to the following conditions:      *)
(*                                                                           *)
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(* in all copies or substantial portions of the Software.                    *)
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(* DEALINGS IN THE SOFTWARE.                                                 *)
(*                                                                           *)
(*****************************************************************************)

type ('a, 'b) t = {value : 'a; run : 'a -> 'b Lwt.t}

let run {value; run} = run value

let map f {value; run} =
  let run x =
    let* output = run x in
    return (f output)
  in
  {value; run}

type 'a process = (Process.t, 'a) t

module Syntax = struct
  type nonrec ('a, 'b) t = ('a, 'b) t = {value : 'a; run : 'a -> 'b Lwt.t}

  let ( let*! ) x f =
    let* res = run x in
    f res

  let ( let*? ) x f = f x.value
end