+
+LY_DEFINE (ly_event_deep_copy, "ly:event-deep-copy",
+ 1, 0, 0, (SCM m),
+ "Copy @var{m} and all sub expressions of @var{m}")
+{
+ SCM copy = m;
+ if (Stream_event *ev = unsmob_stream_event (m))
+ {
+ ev = ev->clone ();
+ copy = ev->unprotect ();
+ }
+ else if (scm_is_pair (m))
+ copy = scm_cons (ly_event_deep_copy (scm_car (m)),
+ ly_event_deep_copy (scm_cdr (m)));
+
+ return copy;
+}