X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Fng_paramodulation%2Fterms.mli;h=93f106a4f1c9e8c8464a1582a13d6d0a4c79d6c8;hb=f9abd21eb0d26cf9b632af4df819225be4d091e3;hp=e0576d1f3e95dea87cd8d3955b125ac41e4f9588;hpb=f7bfbdc706a75256c0e9b15ecc242175f562eb71;p=helm.git

diff --git a/helm/software/components/ng_paramodulation/terms.mli b/helm/software/components/ng_paramodulation/terms.mli
index e0576d1f3..93f106a4f 100644
--- a/helm/software/components/ng_paramodulation/terms.mli
+++ b/helm/software/components/ng_paramodulation/terms.mli
@@ -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
 
@@ -52,9 +52,27 @@ type 'a unit_clause =
 
 type 'a passive_clause = int * 'a unit_clause (* weight * equation *)
 
+val is_eq_clause : 'a unit_clause -> bool
+val vars_of_term : 'a foterm -> int list
+
 module M : Map.S with type key = int 
 
-type 'a bag = ('a unit_clause * bool) M.t
+type 'a bag = int (* max ID  *)
+              * (('a unit_clause * bool * int) M.t)
+
+(* also gives a fresh ID to the clause *)
+    val add_to_bag : 
+          'a unit_clause -> 'a bag ->
+            'a bag * 'a unit_clause
+
+    val replace_in_bag : 
+          'a unit_clause * bool * int -> 'a bag ->
+            'a bag
+
+    val get_from_bag : 
+          int -> 'a bag -> 'a unit_clause * bool * int
+
+    val empty_bag : 'a bag
 
 module type Blob =
   sig
@@ -69,6 +87,7 @@ module type Blob =
     (* TODO: consider taking in input an imperative buffer for Format 
      *  val pp : Format.formatter -> t -> unit
      * *)
+    val is_eq : t foterm -> (t foterm * t foterm * t foterm) option
     val pp : t -> string
 
     type input