+ L.error BagO.specs (L.Warn s :: L.Loc :: msg); flush_all ()
+
+let brg_error s msg =
+ L.error BrgR.specs (L.Warn s :: L.Loc :: msg); flush_all ()
+
+let process_entity f st =
+ let f ast = f {st with ast = ast} in
+ AP.process_entity f st.ast
+
+(* kernel related ***********************************************************)
+
+type kernel = Brg | Bag
+
+type kernel_entity = BrgEntity of Brg.entity
+ | BagEntity of Bag.entity
+ | DrgEntity of Drg.entity
+ | MetaEntity of Meta.entity
+
+let kernel = ref Brg
+
+let print_counters st = match !kernel with
+ | Brg -> BrgO.print_counters C.start st.brgc
+ | Bag -> BagO.print_counters C.start st.bagc
+
+let xlate f st entity = match !kernel, entity with
+ | Brg, DrgEntity e ->
+ let f e = f st (BrgEntity e) in Y.xlate f DBrg.brg_of_drg e
+ | Brg, MetaEntity e ->
+ let f e = f st (BrgEntity e) in Y.xlate f MBrg.brg_of_meta e
+ | Bag, MetaEntity e ->
+ let f e = f st (BagEntity e) in Y.xlate f MBag.bag_of_meta e
+ | _, entity -> f st entity
+
+let pp_progress e =
+ let f a u =
+ let s = U.string_of_uri u in
+ let err () = L.warn (P.sprintf "%s" s) in
+ let f i = L.warn (P.sprintf "[%u] %s" i s) in
+ Y.mark err f a
+ in
+ match e with
+ | DrgEntity e -> Y.common f e
+ | BrgEntity e -> Y.common f e
+ | BagEntity e -> Y.common f e
+ | MetaEntity e -> Y.common f e
+
+let count_entity st = function
+ | MetaEntity e -> {st with mc = count MO.count_entity st.mc e}
+ | BrgEntity e -> {st with brgc = count BrgO.count_entity st.brgc e}
+ | BagEntity e -> {st with bagc = count BagO.count_entity st.bagc e}
+ | _ -> st
+
+let export_entity si g moch = function
+ | DrgEntity e -> X.export_entity DO.export_term si g e
+ | BrgEntity e -> X.old_export_entity BrgO.export_term si g e
+ | MetaEntity e ->
+ begin match moch with
+ | None -> ()
+ | Some och -> ML.write_entity C.start och e
+ end
+ | BagEntity _ -> ()
+
+let type_check f st si g k =
+ let brg_err msg = brg_error "Type Error" msg; failwith "Interrupted" in
+ let ok _ (a, u, _) = f st a u in
+ match k with
+ | BrgEntity entity -> BrgU.type_check brg_err ok ~si g entity
+ | BagEntity entity -> BagU.type_check ok ~si g entity
+ | DrgEntity (a, u, _)
+ | MetaEntity (a, u, _) -> f st a u
+
+(****************************************************************************)
+
+let stage = ref 3
+let moch = ref None
+let meta = ref false
+let progress = ref false
+let preprocess = ref false
+let use_cover = ref true
+let si = ref false
+let cc = ref false
+let export = ref false
+let graph = ref (H.graph_of_string C.err C.start "Z2")
+let old = ref false
+
+let process_3 f st a u =
+ f st
+
+let process_2 f st entity =
+ let st = count_entity st entity in
+ if !export then export_entity !si !graph !moch entity;
+ if !stage > 2 then type_check (process_3 f) st !si !graph entity else f st
+
+let process_1 f st entity =
+ if !progress then pp_progress entity;
+ let st = count_entity st entity in
+ if !export && !stage = 1 then export_entity !si !graph !moch entity;
+ if !stage > 1 then xlate (process_2 f) st entity else f st
+
+let process_0 f st entity =
+ let f st entity =
+ if !stage = 0 then f st else
+ let frr mst = f {st with mst = mst} in
+ let h mst e = process_1 f {st with mst = mst} (MetaEntity e) in
+ let err dst = f {st with dst = dst} in
+ let g dst e = process_1 f {st with dst = dst} (DrgEntity e) in
+ if !old then MA.meta_of_aut frr h st.mst entity else
+ DA.drg_of_aut err g st.dst entity
+ in
+ let st = {st with ac = count AO.count_entity st.ac entity} in
+ if !preprocess then process_entity f st entity else f st entity
+
+let rec process f book st = match book with
+ | [] -> f st
+ | entity :: tl ->
+(* we exploit tail recursion rather than CPS *)
+ process f tl (process_0 C.start st entity)
+
+(****************************************************************************)