(* Time-stamp: <modified the 08/03/2019 (at 13:54) by Erwan Jahier> *)

(* This is algo 5.3 in the book *)

open Algo

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

let init_vars = function _ -> I (Random.int d)

let enable_f nl e = if  (e "d") <> I 0 then ["CD"] else []
  
let step_f 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;
  ()