From 449295993c1fb0732fd5b14a570f8c5260653164 Mon Sep 17 00:00:00 2001
From: Andrea Asperti <andrea.asperti@unibo.it>
Date: Wed, 2 Dec 2009 09:48:37 +0000
Subject: [PATCH] Added a function remove_unit_clause

---
 .../components/ng_paramodulation/index.ml     | 26 +++++++++----------
 .../components/ng_paramodulation/index.mli    |  7 +++--
 2 files changed, 18 insertions(+), 15 deletions(-)

diff --git a/helm/software/components/ng_paramodulation/index.ml b/helm/software/components/ng_paramodulation/index.ml
index 4db4584a4..b6ca890b2 100644
--- a/helm/software/components/ng_paramodulation/index.ml
+++ b/helm/software/components/ng_paramodulation/index.ml
@@ -81,27 +81,27 @@ module Index(B : Orderings.Blob) = struct
       type dataset = ClauseSet.t
     = Make(FotermIndexable)(ClauseSet)
   
-  let index_unit_clause maxvar t = function
+  let process op t = function
     | (_,Terms.Equation (l,_,_,Terms.Gt),_,_) as c -> 
-          DT.index t l (Terms.Left2Right, c)
+        op t l (Terms.Left2Right, c)
     | (_,Terms.Equation (_,r,_,Terms.Lt),_,_) as c -> 
-          DT.index t r (Terms.Right2Left, c)
+        op t r (Terms.Right2Left, c)
     | (_,Terms.Equation (l,r,_,Terms.Incomparable),vl,_) as c ->
-(*	if are_invertible maxvar vl l r then
-	  (prerr_endline ("Invertible " ^ (Pp.pp_foterm l) ^ "=" ^
-	     (Pp.pp_foterm r));
-           DT.index t l (Terms.Left2Right, c))
-	   else *)
-          DT.index  
-           (DT.index t l (Terms.Left2Right, c))
-           r (Terms.Right2Left, c)
+        op (op t l (Terms.Left2Right, c))
+          r (Terms.Right2Left, c)
     | (_,Terms.Equation (l,r,_,Terms.Invertible),vl,_) as c ->
-	DT.index t l (Terms.Left2Right, c)
+	op t l (Terms.Left2Right, c)
     | (_,Terms.Equation (_,r,_,Terms.Eq),_,_)  -> assert false
     | (_,Terms.Predicate p,_,_) as c ->
-          DT.index t p (Terms.Nodir, c)
+        op t p (Terms.Nodir, c)
   ;;
 
+  let index_unit_clause = 
+    process DT.index 
+ 
+  let remove_unit_clause =
+    process DT.remove_index 
+
   type active_set = B.t Terms.unit_clause list * DT.t
 
 end
diff --git a/helm/software/components/ng_paramodulation/index.mli b/helm/software/components/ng_paramodulation/index.mli
index bfed8d533..2fc8ec1e8 100644
--- a/helm/software/components/ng_paramodulation/index.mli
+++ b/helm/software/components/ng_paramodulation/index.mli
@@ -26,8 +26,11 @@ module Index (B : Orderings.Blob) :
       type data = ClauseSet.elt and 
       type dataset = ClauseSet.t
     
-    val index_unit_clause :
-          int -> DT.t -> B.t Terms.unit_clause -> DT.t 
+    val index_unit_clause : 
+      DT.t -> B.t Terms.unit_clause -> DT.t 
+
+    val remove_unit_clause :
+      DT.t -> B.t Terms.unit_clause -> DT.t 
 
     type active_set = B.t Terms.unit_clause list * DT.t
 
-- 
2.39.2