X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2FmatitaEngine.ml;h=133893f0d1e8cf77155f33de2b3d1fa6a0f4db47;hb=81ca7521b39937cf79056465e18b4666ce1f34ff;hp=40480995971d22f3cb14a1933382427718f25f7f;hpb=cbcd34fe15122eb9835a5226b98be1050b097d6a;p=helm.git

diff --git a/matita/matitaEngine.ml b/matita/matitaEngine.ml
index 404809959..133893f0d 100644
--- a/matita/matitaEngine.ml
+++ b/matita/matitaEngine.ml
@@ -98,39 +98,63 @@ let eval_ast ?do_heavy_checks ?clean_baseuri lexicon_status
  in
   ((new_grafite_status,new_lexicon_status),None)::intermediate_states
 
+exception TryingToAdd of string
+
+let out = ref ignore 
+
+let set_callback f = out := f
+
 let eval_from_stream ~first_statement_only ~include_paths ?(prompt=false)
- ?do_heavy_checks ?clean_baseuri lexicon_status grafite_status
- str cb 
+ ?do_heavy_checks ?clean_baseuri ?(enforce_no_new_aliases=true)
+ ?(watch_statuses=fun _ _ -> ()) lexicon_status grafite_status str cb 
 =
  let rec loop lexicon_status grafite_status statuses =
   let loop =
    if first_statement_only then
-    fun _ _ _ -> raise End_of_file
+    fun _ _ statuses -> statuses
    else
     loop
   in
    if prompt then (print_string "matita> "; flush stdout);
-   try
-    let lexicon_status,ast =
-     GrafiteParser.parse_statement ~include_paths str lexicon_status
-    in
+   let cont =
+     try
+       Some (GrafiteParser.parse_statement ~include_paths str lexicon_status)
+     with
+       End_of_file -> None
+   in
+   match cont with
+   | None -> statuses
+   | Some (lexicon_status,ast) ->
      (match ast with
          GrafiteParser.LNone _ ->
+          watch_statuses lexicon_status grafite_status ;
           loop lexicon_status grafite_status
            (((grafite_status,lexicon_status),None)::statuses)
        | GrafiteParser.LSome ast ->
+          !out ast;
           cb grafite_status ast;
           let new_statuses =
            eval_ast ?do_heavy_checks ?clean_baseuri lexicon_status
             grafite_status ("",0,ast) in
+          if enforce_no_new_aliases then
+           List.iter 
+            (fun (_,alias) ->
+              match alias with
+                None -> ()
+              | Some (k,((v,_) as value)) ->
+                 let newtxt =
+                  DisambiguatePp.pp_environment
+                   (DisambiguateTypes.Environment.add k value
+                     DisambiguateTypes.Environment.empty)
+                 in
+                  raise (TryingToAdd newtxt)) new_statuses;
           let grafite_status,lexicon_status =
            match new_statuses with
               [] -> assert false
             | (s,_)::_ -> s
           in
+           watch_statuses lexicon_status grafite_status ;
            loop lexicon_status grafite_status (new_statuses @ statuses))
-   with
-    End_of_file -> statuses
  in
   loop lexicon_status grafite_status []
 ;;