/* Initializes |trav| to have the same current node as |src|. */
void *
tbst_t_copy (struct tbst_traverser *trav, const struct tbst_traverser *src)
{
  assert (trav != NULL && src != NULL);

  trav->tbst_table = src->tbst_table;
  trav->tbst_node = src->tbst_node;

  return trav->tbst_node != NULL ? trav->tbst_node->tbst_data : NULL;
}