CristalCaveGem » LustreC

let expr_of_vars loc vl = 

  Corelang.expr_of_expr_list loc

    (List.map Corelang.expr_of_vdecl vl)

  (* TODO: check that nd1 and nd2 have the same signature *)

  in

  let input_e = expr_of_vars loc check_nd.node_inputs in

  let mk_stmt nd out_vars =

    let call_e = Corelang.mkexpr loc (Expr_appl (nd.node_id, input_e , None)) in

    Eq (

        Corelang.mkeq loc

          (List.map (fun v -> v.var_id) out_vars, call_e)) in

  let copy_vars vl post =

    let f v = { (Corelang.copy_var_decl v) with var_id = v.var_id ^ "_" ^ post } in

    List.map f vl

  in

  let out_vars1 = copy_vars nd1.node_outputs "1" in

  let out_vars2 = copy_vars nd1.node_outputs "2" in

  let call_n1 = mk_stmt nd1 out_vars1 in

  let call_n2 = mk_stmt nd2 out_vars2 in

  let build_eq v1 v2 =

    let pair = expr_of_vars loc [v1;v2] in

    Corelang.mkexpr loc (Expr_appl ("=", pair, None))

  in

  let rec build_ok vl1 vl2 =

    match vl1, vl2 with

    | [v1], [v2] -> build_eq v1 v2

    | hd1::tl1, hd2::tl2 -> 

       let e1 = (build_eq hd1 hd2) in

       let e2 = build_ok tl1 tl2 in

       let e = Corelang.mkexpr loc (Expr_tuple [e1; e2]) in

       Corelang.mkexpr loc (Expr_appl ("&&", e, None))

    | _ -> assert false

  in

  let ok_expr  = build_ok out_vars1 out_vars2 in 

  let ok_stmt = Eq (Corelang.mkeq loc ([ok_var.var_id], ok_expr)) in

  (* Building contract *)

    let ok_e = Corelang.expr_of_vdecl ok_var in

  let contract = {

        consts = [];

        locals = [];

       stmts = [];

        assume = [];

        guarantees = [Corelang.mkeexpr loc ok_e];

       modes = [];

        imports = [];

        spec_loc = loc;              

      }

  in

                   node_outputs = [ok_var];

                   node_locals = out_vars1 @ out_vars2;

                   node_stmts = [call_n1; call_n2; ok_stmt];

                   node_spec = Some (Contract contract);

  Global.type_env := Typing.type_node !Global.type_env check_nd loc;

  Global.clock_env := Clock_calculus.clock_node !Global.clock_env loc check_nd;

  check_nd

   *