+ (define (analyse-apart-silence result-idx)
+ "Analyse 'apart-silence starting at RESULT-IDX. Return next index."
+ (let* ((now-state (vector-ref result result-idx))
+ (vs1 (current-voice-state now-state 1))
+ (vs2 (current-voice-state now-state 2))
+ (rests1 (if vs1 (rest-and-skip-events vs1) '()))
+ (rests2 (if vs2 (rest-and-skip-events vs2) '()))
+ (prev-state (if (> result-idx 0)
+ (vector-ref result (- result-idx 1))
+ #f))
+ (prev-config (if prev-state
+ (configuration prev-state)
+ 'apart-silence)))
+ (cond
+ ;; rest with multi-measure rest: choose the rest
+ ((and (synced? now-state)
+ (= 1 (length rests1))
+ (ly:in-event-class? (car rests1) 'rest-event)
+ (= 0 (length rests2))) ; probably mmrest
+ (put 'silence1))
+
+ ;; as above with parts swapped
+ ((and (synced? now-state)
+ (= 1 (length rests2))
+ (ly:in-event-class? (car rests2) 'rest-event)
+ (= 0 (length rests1))) ; probably mmrest
+ (put 'silence2))
+
+ ((synced? now-state)
+ (put 'apart-silence))
+
+ ;; remain in the silence1/2 states until resync
+ ((equal? prev-config 'silence1)
+ (put 'silence1))
+
+ ((equal? prev-config 'silence2)
+ (put 'silence2))
+
+ (else
+ (put 'apart-silence)))
+
+ (1+ result-idx)))
+
+ (define (analyse-apart result-idx)