First compiling version

[helm.git] / helm / software / components / ng_paramodulation / terms.ml

diff --git a/helm/software/components/ng_paramodulation/terms.ml b/helm/software/components/ng_paramodulation/terms.ml
index 9a225fd27b2807f3a3ea37d57276eb93332e384a..0e69cace91c57189aad37d6a50247d5a7dfb18ba 100644 (file)
--- a/helm/software/components/ng_paramodulation/terms.ml
+++ b/helm/software/components/ng_paramodulation/terms.ml
@@ -18,7 +18,7 @@ type 'a foterm =
 
 type 'a substitution = (int * 'a foterm) list
 
-type comparison = Lt | Eq | Gt | Incomparable
+type comparison = Lt | Eq | Gt | Incomparable | Invertible
 
 type rule = Superposition | Demodulation
 type direction = Left2Right | Right2Left | Nodir
@@ -44,15 +44,24 @@ type 'a unit_clause =
  * varlist       (* variable list *)
  * 'a proof      (* proof *)
 
-type 'a passive_clause = int * 'a unit_clause (* weight * equation *)
+type 'a clause =
+    int
+    * ('a literal * bool) list (* left hand side of the arrow,
+                                 with flag for selection *)
+    * ('a literal * bool) list (* right hand side of the arrow,
+                                 with flag for selection *)
+    * varlist
+    * 'a proof
 
+type 'a passive_clause = int * 'a clause (* weight * equation *)
 
-let vars_of_term t =
+
+let vars_of_term ?(start_acc=[]) 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
+  in aux start_acc t
 ;;
 
 module OT =
@@ -65,16 +74,16 @@ module M : Map.S with type key = int
   = Map.Make(OT) 
 
 type 'a bag = int
-              * (('a unit_clause * bool * int) M.t)
+              * (('a clause * bool * int) M.t)
 
-  let add_to_bag (_,lit,vl,proof) (id,bag) =
+  let add_to_bag (_,nlit,plit,vl,proof) (id,bag) =
     let id = id+1 in
-    let clause = (id, lit, vl, proof) in
+    let clause = (id, nlit, plit, 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 replace_in_bag ((id,_,_,_,_),_,_ as cl) (max_id,bag) =
     let bag = M.add id cl bag in
       (max_id,bag)
   ;;