val print_metasenv: Cic.metasenv -> string
-val print_subst: Cic.substitution -> string
+val print_subst: ?prefix:string -> Cic.substitution -> string
val string_of_weight: weight -> string
(** term-ordering function settable by the user *)
val compare_terms: (Cic.term -> Cic.term -> comparison) ref
+
+type equality_sign = Negative | Positive
+
+val string_of_sign: equality_sign -> string
+
+type pos = Left | Right
+
+val string_of_pos: pos -> string
+
+val compute_equality_weight: Cic.term -> Cic.term -> Cic.term -> int
+
+val debug_print: string -> unit