+val av_empty : unit -> av
+(** Create an empty [AV] (array). *)
+val av_of_sv_list : sv list -> av
+(** Create an array from a list of [SVs]. *)
+val av_push : av -> sv -> unit
+(** Append the [SV] to the end of the array. Same as Perl
+ * [push \@av, $sv]. *)
+val av_pop : av -> sv
+(** Remove the [SV] at the end of the array and return it. Same as
+ * Perl [$sv = pop \@av]. *)
+val av_shift : av -> sv
+(** Remove the [SV] at the beginning of the array and return it. Same as
+ * Perl [$sv = shift \@av]. *)
+val av_unshift : av -> sv -> unit
+(** Prepend the [SV] to the start of the array. Same as Perl
+ * [unshift \@av, $sv]. *)
+val av_length : av -> int
+(** Return the length of the [AV]. *)
+val av_set : av -> int -> sv -> unit
+(** Replace the i'th element of the [AV] with [SV]. *)
+val av_get : av -> int -> sv
+(** Get the i'th element of the [AV]. *)
+val av_clear : av -> unit
+(** Remove all elements from the [AV]. Same as Perl [\@av = ()]. *)
+val av_undef : av -> unit
+(** Delete the [AV] (and all elements in it). Same as Perl [undef \@av]. *)
+val av_extend : av -> int -> unit
+(** Extend the [AV] so it contains at least [n+1] elements. *)
+val av_map : (sv -> 'a) -> av -> 'a list
+(** Map a function over the elements in the [AV], return a list of the
+ * results. *)
+val list_of_av : av -> sv list
+(** Convert an [AV] into a simple list of [SV]s. *)
+val av_of_string_list : string list -> av
+(** Build an [AV] from a list of strings. *)
+
+val hv_empty : unit -> hv
+(** Create an empty [HV] (hash). *)
+val hv_set : hv -> string -> sv -> unit
+(** Store the given [SV] in the named key in the hash. *)
+val hv_get : hv -> string -> sv
+(** Return the [SV] at the key in the hash. Throws [Not_found] if no key. *)
+val hv_exists : hv -> string -> bool
+(** Return true if the hash contains the given key. Same as Perl [exists]. *)
+val hv_delete : hv -> string -> unit
+(** Delete the given key from the hash. Same as Perl [delete]. *)
+val hv_clear : hv -> unit
+(** Remove all elements from the [HV]. Same as Perl [%av = ()]. *)
+val hv_undef : hv -> unit
+(** Delete the [HV] (and all elements in it). Same as Perl [undef %hv]. *)
+
+val get_sv : ?create:bool -> string -> sv