more push/pop to avoid confusion with imperative data structures employed by

[helm.git] / helm / software / components / content_pres / termContentPres.ml

diff --git a/helm/software/components/content_pres/termContentPres.ml b/helm/software/components/content_pres/termContentPres.ml
index 0c83dd0bbb602334227444f8b0788811adb76e9f..378708bce764e9e0e8010ff5b64e696f9e52f7eb 100644 (file)
--- a/helm/software/components/content_pres/termContentPres.ml
+++ b/helm/software/components/content_pres/termContentPres.ml
@@ -281,11 +281,32 @@ let pp_ast0 t k =
 
   (* persistent state *)
 
-let level1_patterns21 = Hashtbl.create 211
-
+let initial_level1_patterns21 () = Hashtbl.create 211
+let level1_patterns21 = ref (initial_level1_patterns21 ())
 let compiled21 = ref None
-
 let pattern21_matrix = ref []
+let counter = ref ~-1 
+
+let stack = ref [];;
+
+let push () =
+  stack := (!counter,!level1_patterns21,!compiled21,!pattern21_matrix)::!stack;
+  counter := ~-1;
+  level1_patterns21 := initial_level1_patterns21 ();
+  compiled21 := None;
+  pattern21_matrix := []
+;;
+
+let pop () =
+ match !stack with
+    [] -> assert false
+  | (ocounter,olevel1_patterns21,ocompiled21,opatterns21_matrix)::old ->
+     stack := old;
+     counter := ocounter;
+     level1_patterns21 := olevel1_patterns21;
+     compiled21 := ocompiled21;
+     pattern21_matrix := opatterns21_matrix
+;;
 
 let get_compiled21 () =
   match !compiled21 with
@@ -342,21 +363,16 @@ let instantiate21 idrefs env l1 =
   and subst_magic pos env = function
     | Ast.List0 (p, sep_opt)
     | Ast.List1 (p, sep_opt) ->
-        prerr_endline "1";
         let rec_decls = CicNotationEnv.declarations_of_term p in
-        prerr_endline "2";
         let rec_values =
           List.map (fun (n, _) -> CicNotationEnv.lookup_list env n) rec_decls
         in
-        prerr_endline "3";
         let values = CicNotationUtil.ncombine rec_values in
-        prerr_endline "4";
         let sep =
           match sep_opt with
             | None -> []
             | Some l -> [ Ast.Literal l; break; space ]
        in
-        prerr_endline "5";
         let rec instantiate_list acc = function
           | [] -> List.rev acc
          | value_set :: [] ->
@@ -446,7 +462,7 @@ let rec pp_ast1 term =
           in
           let l1 =
             try
-              Hashtbl.find level1_patterns21 pid
+              Hashtbl.find !level1_patterns21 pid
             with Not_found -> assert false
           in
           instantiate21 idrefs (ast_env_of_env env) l1)
@@ -475,11 +491,6 @@ let fill_pos_info l1_pattern = l1_pattern
   in
   aux true l1_pattern *)
 
-let counter = ref ~-1 
-let reset () =
-  counter := ~-1;
-  Hashtbl.clear level1_patterns21
-;;
 let fresh_id =
   fun () ->
     incr counter;
@@ -489,14 +500,14 @@ let add_pretty_printer l2 (CicNotationParser.CL1P (l1,precedence)) =
   let id = fresh_id () in
   let l1' = add_level_info precedence (fill_pos_info l1) in
   let l2' = CicNotationUtil.strip_attributes l2 in
-  Hashtbl.add level1_patterns21 id l1';
+  Hashtbl.add !level1_patterns21 id l1';
   pattern21_matrix := (l2', id) :: !pattern21_matrix;
   load_patterns21 !pattern21_matrix;
   id
 
 let remove_pretty_printer id =
   (try
-    Hashtbl.remove level1_patterns21 id;
+    Hashtbl.remove !level1_patterns21 id;
   with Not_found -> raise Pretty_printer_not_found);
   pattern21_matrix := List.filter (fun (_, id') -> id <> id') !pattern21_matrix;
   load_patterns21 !pattern21_matrix