X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Fng_refiner%2FnCicCoercion.ml;h=29fe0fd540d48924dd06a8b52c319cc9497848bb;hb=c22f39a5d5afc0ef55beb221e00e2e6703b13d90;hp=e62d4eed324d7489226e77fda3e7d86f27e7f9ec;hpb=dcdbb979433a61e2ef2842d96604098728824416;p=helm.git

diff --git a/helm/software/components/ng_refiner/nCicCoercion.ml b/helm/software/components/ng_refiner/nCicCoercion.ml
index e62d4eed3..29fe0fd54 100644
--- a/helm/software/components/ng_refiner/nCicCoercion.ml
+++ b/helm/software/components/ng_refiner/nCicCoercion.ml
@@ -24,7 +24,20 @@ module DB =
 
 type db = DB.t * DB.t
 
-let index_coercion (db_src,db_tgt) c src tgt arity arg =
+let empty_db = DB.empty,DB.empty
+
+class status =
+ object
+  val db = empty_db
+  method coerc_db = db
+  method set_coerc_db v = {< db = v >}
+  method set_coercion_status
+   : 'status. < coerc_db : db; .. > as 'status -> 'self
+   = fun o -> {< db = o#coerc_db >}
+ end
+
+let index_coercion status c src tgt arity arg =
+  let db_src,db_tgt = status#coerc_db in
   let data = (c,arity,arg) in
 (*
   prerr_endline ("INDEX:" ^ 
@@ -34,14 +47,14 @@ let index_coercion (db_src,db_tgt) c src tgt arity arg =
 *)
   let db_src = DB.index db_src src data in
   let db_tgt = DB.index db_tgt tgt data in
-  db_src, db_tgt
+  status#set_coerc_db (db_src, db_tgt)
 ;;
 
-let index_old_db odb db =
+let index_old_db odb (status : #status) =
   List.fold_left 
-    (fun db (_,tgt,clist) -> 
+    (fun status (_,tgt,clist) -> 
        List.fold_left 
-         (fun db (uri,_,arg) ->
+         (fun status (uri,_,arg) ->
            try
             let c=fst (OCic2NCic.convert_term uri (CicUtil.term_of_uri uri)) in
             let arity = match tgt with | CoercDb.Fun i -> i | _ -> 0 in
@@ -67,18 +80,16 @@ let index_old_db odb db =
                     NCicPp.ppterm ~metasenv ~subst:[] ~context:[] t);
                   assert false
             in
-            index_coercion db c src tgt arity arg
+            index_coercion status c src tgt arity arg
            with 
            | NCicEnvironment.BadDependency _ 
-           | NCicTypeChecker.TypeCheckerFailure _ -> db)
-         db clist)
-    db (CoercDb.to_list odb)
+           | NCicTypeChecker.TypeCheckerFailure _ -> status)
+         status clist)
+    status (CoercDb.to_list odb)
 ;;
 
-let empty_db = (DB.empty,DB.empty) ;;
-
-
-let look_for_coercion (db_src,db_tgt) metasenv subst context infty expty =
+let look_for_coercion status metasenv subst context infty expty =
+ let db_src,db_tgt = status#coerc_db in
   match infty, expty with
   | (NCic.Meta _ | NCic.Appl (NCic.Meta _::_)), 
     (NCic.Meta _ | NCic.Appl (NCic.Meta _::_)) -> []