SPLAY_NEXT
(x) = SPLAY_NEXT(name, head, x))
next_con = SPLAY_NEXT(session_tree,
curr = SPLAY_NEXT(_dict, &d->dict, curr);
curr = SPLAY_NEXT(_dict, &d->dict, &key);
curr = SPLAY_NEXT(_dict, &d->dict, curr);
evp2 = SPLAY_NEXT(prioqtree, &rq->q_priotree, evp);
curr = SPLAY_NEXT(_tree, &t->tree, curr);
curr = SPLAY_NEXT(_tree, &t->tree, &key);
curr = SPLAY_NEXT(_tree, &t->tree, curr);