broadcast-stream-streams (broadcast-stream-streams stream) ブロードキャストストリームのコンポーネントリスト。書き込み側における concatenated-stream-streams にあたります。 Run(let ((a (make-string-output-stream)) (b (make-string-output-stream))) (let ((s (make-broadcast-stream a b))) (list (length (broadcast-stream-streams s)) (eq (car (broadcast-stream-streams s)) a)))) ; => (2 T)