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17.2.6.2 ¥½¡¼¥¹¾å¤Î¥Ö¥ì¡¼¥¯¥Ý¥¤¥ó¥È

ÄêµÁÆâ¤Î¤¹¤Ù¤Æ¤Î¥Ö¥ì¡¼¥¯¥Ý¥¤¥ó¥È¤Ï¡¢ÄêµÁ¤ò½èÃÖ¤·Ä¾¤¹¤¿¤Ó¤Ë¼º¤ï¤ì¤Þ¤¹¡£ ¥Ö¥ì¡¼¥¯¥Ý¥¤¥ó¥È¤ò¼º¤¤¤¿¤¯¤Ê¤¤¾ì¹ç¤Ë¤Ï¡¢ ¥½¡¼¥¹¾å¤Î¥Ö¥ì¡¼¥¯¥Ý¥¤¥ó¥È¡Êsource breakpoint¡Ë¤ò»ØÄê¤Ç¤­¤Þ¤¹¡£ ¤³¤ì¤Ï¥½¡¼¥¹¥³¡¼¥É¾å¤Ç´Ø¿ôedebug¤ò¸Æ¤Ó½Ð¤¹¤À¤±¤Ç¤¹¡£ ¤â¤Á¤í¤ó¡¢¾ò·ïÉÕ¤±¤·¤Æ¸Æ¤Ó½Ð¤»¤Þ¤¹¡£ ¤¿¤È¤¨¤Ð¡¢´Ø¿ôfac¤Ë¤ª¤¤¤Æ¡¢°ú¿ô¤¬¥¼¥í¤Î¾ì¹ç¤ËÄä»ß¤¹¤ë¤Ë¤Ï¡¢ °Ê²¼¤Ë¼¨¤¹¤è¤¦¤ËºÇ½é¤Î¹Ô¤òÁÞÆþ¤·¤Þ¤¹¡£

(defun fac (n)
  (if (= n 0) (edebug))
  (if (< 0 n)
      (* n (fac (1- n)))
    1))

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edebug¤ò¸Æ¤Ó½Ð¤·¤¿¥³¡¼¥É¤¬½èÃֺѤߤǤʤ±¤ì¤Ð¡¢ ¤³¤Î´Ø¿ô¤Ïdebug¤ò¸Æ¤Ó½Ð¤·¤Þ¤¹¡£