+ object_t () = default;
+
+#ifdef HB_EXPERIMENTAL_API
+ object_t (const hb_object_t &o)
+ {
+ head = o.head;
+ tail = o.tail;
+ next = nullptr;
+ real_links.alloc (o.num_real_links, true);
+ for (unsigned i = 0 ; i < o.num_real_links; i++)
+ real_links.push (o.real_links[i]);
+
+ virtual_links.alloc (o.num_virtual_links, true);
+ for (unsigned i = 0; i < o.num_virtual_links; i++)
+ virtual_links.push (o.virtual_links[i]);
+ }
+#endif
+
+ friend void swap (object_t& a, object_t& b)
+ {
+ hb_swap (a.head, b.head);
+ hb_swap (a.tail, b.tail);
+ hb_swap (a.next, b.next);
+ hb_swap (a.real_links, b.real_links);
+ hb_swap (a.virtual_links, b.virtual_links);
+ }
+