X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Fng_paramodulation%2Fterms.ml;h=9a225fd27b2807f3a3ea37d57276eb93332e384a;hb=4244a4d70b9ab2fece0ff5b63506f6d323cbfbe2;hp=1d1465f9e6d7cfe5525792835ddafed373f44706;hpb=f7bfbdc706a75256c0e9b15ecc242175f562eb71;p=helm.git

diff --git a/helm/software/components/ng_paramodulation/terms.ml b/helm/software/components/ng_paramodulation/terms.ml
index 1d1465f9e..9a225fd27 100644
--- a/helm/software/components/ng_paramodulation/terms.ml
+++ b/helm/software/components/ng_paramodulation/terms.ml
@@ -47,6 +47,14 @@ type 'a unit_clause =
 type 'a passive_clause = int * 'a unit_clause (* weight * equation *)
 
 
+let vars_of_term t =
+  let rec aux acc = function
+    | Leaf _ -> acc
+    | Var i -> if (List.mem i acc) then acc else i::acc
+    | Node l -> List.fold_left aux acc l
+  in aux [] t
+;;
+
 module OT =
  struct
    type t = int 
@@ -56,7 +64,26 @@ module OT =
 module M : Map.S with type key = int 
   = Map.Make(OT) 
 
-type 'a bag = ('a unit_clause * bool) M.t
+type 'a bag = int
+              * (('a unit_clause * bool * int) M.t)
+
+  let add_to_bag (_,lit,vl,proof) (id,bag) =
+    let id = id+1 in
+    let clause = (id, lit, vl, proof) in
+    let bag = M.add id (clause,false,0) bag in
+    (id,bag), clause 
+   ;;
+
+  let replace_in_bag ((id,_,_,_),_,_ as cl) (max_id,bag) =
+    let bag = M.add id cl bag in
+      (max_id,bag)
+  ;;
+
+  let get_from_bag id (_,bag) =
+    M.find id bag
+  ;;
+    
+  let empty_bag = (0,M.empty);;
 
 module type Blob =
   sig