+bool
+Simultaneous_music_iterator::ok () const
+{
+ bool run_always_ok = false;
+ for (SCM s = children_list_; gh_pair_p (s); s = gh_cdr(s))
+ {
+ Music_iterator * it = unsmob_iterator (gh_car (s));
+ if (!it->run_always ())
+ return true;
+ else
+ run_always_ok = run_always_ok || it->ok ();
+ }
+ return run_always_ok;
+}