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