X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Fng_paramodulation%2Findex.ml;h=3c203d3a7131e7ce1d2411f950975a29c19d9753;hb=1c9b8f3ba2c86446d44160ae494bc85624bc5eaf;hp=d07fba8a44a78b180a5578912e03c1e43c0080f0;hpb=6c4056ea40b96039f24eeda9a1e1900c95bad7c8;p=helm.git

diff --git a/helm/software/components/ng_paramodulation/index.ml b/helm/software/components/ng_paramodulation/index.ml
index d07fba8a4..3c203d3a7 100644
--- a/helm/software/components/ng_paramodulation/index.ml
+++ b/helm/software/components/ng_paramodulation/index.ml
@@ -12,7 +12,7 @@
 (* $Id$ *)
 
 module Index(B : Terms.Blob) = struct
-  module U = Terms.Utils(B)
+  module U = FoUtils.Utils(B)
 
   module ClauseOT =
     struct 
@@ -43,9 +43,11 @@ module Index(B : Terms.Blob) = struct
         let rec aux arity = function
           | Terms.Leaf a -> [Constant (a, arity)]
           | Terms.Var i -> assert (arity = 0); [Variable]
-          | Terms.Node (Terms.Var _::_) -> assert false
+          | Terms.Node (Terms.Var _::_) ->
+	      (* FIXME : should this be allowed or not ? *)
+	      assert false
           | Terms.Node ([] | [ _ ] ) -> assert false
-          | Terms.Node (Terms.Node _::_) -> assert false
+          | Terms.Node (Terms.Node _::_) -> assert false	      
           | Terms.Node (hd::tl) ->
               aux (List.length tl) hd @ List.flatten (List.map (aux 0) tl) 
         in 
@@ -77,4 +79,20 @@ module Index(B : Terms.Blob) = struct
       type dataset = ClauseSet.t
     = Make(FotermIndexable)(ClauseSet)
 
+  let index_unit_clause t = function
+    | (_,Terms.Equation (l,_,_,Terms.Gt),_,_) as c -> 
+          DT.index t l (Terms.Left2Right, c)
+    | (_,Terms.Equation (_,r,_,Terms.Lt),_,_) as c -> 
+          DT.index t r (Terms.Right2Left, c)
+    | (_,Terms.Equation (l,r,_,Terms.Incomparable),_,_) as c ->  
+          DT.index  
+           (DT.index t l (Terms.Left2Right, c))
+           r (Terms.Right2Left, c)
+    | (_,Terms.Equation (_,r,_,Terms.Eq),_,_)  -> assert false
+    | (_,Terms.Predicate p,_,_) as c ->
+          DT.index t p (Terms.Nodir, c)
+  ;;
+
+  type active_set = B.t Terms.unit_clause list * DT.t
+
 end