feat(bv): add equal

src/data/CCBV.ml

@@ -228,6 +228,18 @@ let clear bv =
   assert_bool "must be empty" (CCBV.is_empty bv);
 *)
 
+let equal x y : bool =
+  x.size = y.size &&
+  x.a = y.a
+
+(*$T
+  equal (of_list [1; 3; 4]) (of_list [1; 3; 4])
+  equal (empty()) (empty())
+  not (equal (empty ()) (of_list [1]))
+  not (equal (empty ()) (of_list [2; 5]))
+  not (equal (of_list [1;3]) (of_list [2; 3]))
+*)
+
 let iter bv f =
   let len = array_length_of_size bv.size in
   assert (len <= Array.length bv.a);

src/data/CCBV.mli

@@ -135,6 +135,10 @@ val select : t -> 'a array -> 'a list
 val selecti : t -> 'a array -> ('a * int) list
 (** Same as {!select}, but selected elements are paired with their indexes. *)
 
+val equal : t -> t -> bool
+(** Bitwise comparison, including the size ([equal a b] implies [length a=length b]).
+    @since NEXT_RELEASE *)
+
 type 'a iter = ('a -> unit) -> unit
 
 val to_iter : t -> int iter