CristalCaveGem » LustreC

  (* this file is no longer used. It contains the code that enable the use of

     the CPS to build an evaluator.

     Three pieces of code:

     - excerpt from the main that instanciate the functor to the evaluator and run the provided trace 

     - run_trace function

     - Evaluator module

 *)

  let _main_ _ = 

    | Eval ->

     let module Model = (val model) in

     let module T = CPS_transformer.Evaluator in

     let module Sem = CPS.Semantics (T) (Model) in

     let nb_traces = List.length Model.traces in

     if nb_traces = 0 then

       failwith ("no available traces for model " ^ Model.name);

     if !trace_id >= 0 && !trace_id < nb_traces then

       let eval_func = 

	 match !eval_mode with

	 | CPSEval -> 

	    fun (evt, env) ->

	      let _, env', actions_performed = Sem.compute modularmode (evt, env, []) in

	      env', actions_performed

       in

       run_trace Model.model eval_func (List.nth Model.traces !trace_id)

     else

       failwith (string_of_int !trace_id ^

		   " is not a valid trace index in [0.." ^ string_of_int nb_traces ^ "]")

let run_trace model func t =

  let init_env = Datatype.SF.init_env model in

  let _ = Format.printf "Model definitions@.%a@.Initial state: %s @.####" Datatype.SF.pp_src (snd model) (fst model) in 

  let final_env, cpt =

    List.fold_left (fun (env, cpt) event ->

      Format.printf "#### %i@.%a@." cpt ActiveStates.Env.pp_env env;

      Format.printf "-- Event %a --@." Basetypes.pp_event event;

      let env', actions_performed = func (event, env) in

      let _ =

	match actions_performed with

      | [] -> Format.printf "-- no action performed --@."

      | _ -> (

	Format.printf "@[<v 2>-- action performed --@ ";

	List.iter (fun a -> Format.printf "%s@ " a) actions_performed;

	Format.printf "@]@."

      ) in

      (* we do not consider produced events *)

      env', cpt+1

    ) (init_env, 1) t

  in

  Format.printf "#### %i@.%a@." cpt ActiveStates.Env.pp_env final_env;

  ()

    type truc = A of base_action_t | C of base_condition_t

module Evaluator : TransformerType with type t = (event_t * bool ActiveStates.Env.t * truc list) -> (event_t * bool ActiveStates.Env.t * truc list ) =

struct

  include TransformerStub

  type env_t = event_t * bool ActiveStates.Env.t * truc list (* Don't care for values yet *)

  type t = env_t -> env_t

  let null rho = rho

  let add_action a (evt, rho, al) = (evt, rho, al@[A a]) (* not very efficient but

							  avoid to keep track of

							  action order *)

  let add_condition c (evt, rho, al) = (evt, rho, al@[C c]) (* not very efficient but

							  avoid to keep track of

							  action order *)

  let bot _ = assert false

  let ( >> ) tr1 tr2 = fun rho -> rho |> tr1 |> tr2

  let ( ?? ) b tr = if b then tr else null

  let eval_open p (evt, rho, al)  = (evt, ActiveStates.Env.add p true rho, al)

  let eval_close p (evt, rho, al) = (evt, ActiveStates.Env.add p false rho, al)

  let eval_call : type c. (module ThetaType with type t = t) -> c call_t -> c -> t =

    fun kenv ->

    let module Theta = (val kenv : ThetaType with type t = t) in	      

    fun call -> match call with

    | Ecall -> (fun (p, p', f) -> Theta.theta E p p' f)

    | Dcall -> (fun p          -> Theta.theta D p)

    | Xcall -> (fun (p, f)     -> Theta.theta X p f)

  let eval_act kenv action =

    (* Format.printf "----- action = %a@." Action.pp_act action; *)

    match action with

    | Action.Call (c, a)      -> eval_call kenv c a

    | Action.Quote a          -> add_action a

    | Action.Open p           -> eval_open p

    | Action.Close p          -> eval_close p

    | Action.Nil              -> null

  (*if (match trans.event with None -> true | _ -> e = trans.event) && trans.condition rho*)

  let rec eval_cond condition ok ko : t =

    (* Format.printf "----- cond = %a@." Condition.pp_cond condition; *)

    match condition with

    | Condition.True               -> ok

    | Condition.Active p           -> (fun ((evt, env, al) as rho) -> if ActiveStates.Env.find p env then ok rho else ko rho)

    | Condition.Event e            -> (fun ((evt, env, al) as rho) -> match evt with None -> ko rho | Some e' -> if e=e' then ok rho else ko rho)

    | Condition.Neg cond           -> eval_cond cond ko ok

    | Condition.And (cond1, cond2) -> eval_cond cond1 (eval_cond cond2 ok ko) ko

    | Condition.Quote c            -> add_condition c >> ok (* invalid behavior but similar to the other: should evaluate condition *)

  let pp_transformer fmt tr =

    Format.fprintf fmt "<transformer>"

  let pp_principal fmt tr =

    Format.fprintf fmt "principal =@.%a" pp_transformer tr

  let pp_component : type c. Format.formatter -> c call_t -> c -> t -> unit =

    fun fmt call -> match call with

    | Ecall -> (fun (p, p', f) tr ->

      Format.fprintf fmt "component %a(%a, %a, %a) =@.%a" pp_call call pp_path p pp_path p' pp_frontier f pp_transformer tr)

    | Dcall -> (fun p tr ->

      Format.fprintf fmt "component %a(%a) =@.%a" pp_call call pp_path p pp_transformer tr)

    | Xcall -> (fun (p, f) tr ->

      Format.fprintf fmt "component %a(%a, %a) =@.%a" pp_call call pp_path p pp_frontier f pp_transformer tr)

end