(* Time-stamp: <modified the 09/03/2019 (at 12:47) by Erwan Jahier> *)

(* This is algo 5.3 in the book *)

open Algo

let vars = ["d",It]
let d=10

let (init_vars: neighbor list -> local_env) =
  fun _nl ->
    function _ -> I (Random.int d)

let (enable_f:neighbor list -> local_env -> action list) =
  fun nl e ->
    if (e "d") <> I 0 then ["CD"] else []
  
let (step_f : neighbor list -> local_env -> action -> local_env) =
  fun nl e ->
    function  | _ -> (function "d" -> I 0 | _ -> assert false)

let () =
  let algo_id = "root" in
  Algo.reg_vars      algo_id vars;
  Algo.reg_init_vars algo_id init_vars; 
  Algo.reg_enable    algo_id enable_f;
  Algo.reg_step      algo_id step_f;
  ()