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9.4 ½ÐÎÏÀÚÂØ¤¨Àè¤Î¥Æ¥­¥¹¥È¤òÇË´þ¤¹¤ë

½ÐÎϤòÀÚÂØ¤¨¤Æ¤¤¤ë¤È¤­¤ÏÀÚÂØ¤¨Àè¤Î¥Æ¥­¥¹¥È¤¬¼ÂºÝ¤Ë ɬÍפȤʤ뤫¤É¤¦¤«¤Ïʬ¤«¤é¤Ê¤¤¤³¤È¤¬¤è¤¯¤¢¤ê¤Þ¤¹¡£ ¥Æ¥­¥¹¥È¤¬Î¯¤Ã¤Æ¤¤¤ëÀÚÂØ¤¨Àè¤ÏÆþÎϤ¬½ª¤ê¤Ë㤷¤¿Ãʳ¬¤Ç ¥á¥¤¥ó¤Î½ÐÎÏ¥¹¥È¥ê¡¼¥à¤Ë¤¹¤Ù¤Æ½ÐÎϤµ¤ì¤ë¤Î¤Ç¡¢ ÀÚÂØ¤¨Àè¤Ë¤¿¤Þ¤Ã¤Æ¤¤¤ë¥Æ¥­¥¹¥È¤òÇË´þ¤¹¤ë¤¿¤á¤Î¤Ê¤ó¤é¤«¤Î¼êÃʤ¬É¬ÍפǤ¹¡£ ¤¹¤Ù¤Æ¤ÎÀÚÂØ¤¨Àè¤Î¥Æ¥­¥¹¥È¤òÇË´þ¤·¤¿¤¤¤È¤­¤Ï m4¤Ø¤ÎÆþÎϤò‘divert(-1)’¤È¤½¤ì¤Ë³¤¯ÌÀ¼¨Åª¤Ê‘undivert’ ¤Ç½ª¤¨¤ë¤Î¤¬ºÇ¤â´Êñ¤Ç¤·¤ç¤¦¡£

divert(1)
Diversion one: divnum
divert(2)
Diversion two: divnum
divert(-1)
undivert
^D

¤³¤Î¤È¤­½ÐÎϤϤ¤¤Ã¤µ¤¤¤¢¤ê¤Þ¤»¤ó¡£

ÆÃÄê¤ÎÀÚÂØ¤¨Àè¤Î¥Æ¥­¥¹¥È¤Ï¼¡¤Î¥Þ¥¯¥í¤Ç¾Ãµî¤Ç¤­¤Þ¤¹¡£

define(`cleardivert',
`pushdef(`_num', divnum)divert(-1)undivert($@)divert(_num)popdef(`_num')')
⇒

undivert¤ÈƱ¤¸¤è¤¦¤Ë¸Æ¤Ó½Ð¤·¤Þ¤¹¤¬¡¢ ¤½¤Î¸ú²Ì¤Ï°ú¿ô¤È¤·¤ÆÍ¿¤¨¤é¤ì¤¿ÀÚÂØ¤¨Àè¤Î¥Æ¥­¥¹¥È¤ò¾Ãµî¤¹¤ë¤³¤È¤Ç¤¹¡£ (¤³¤Î¥Þ¥¯¥í¤Ë¤Ï¤Ò¤É¤¤¥Ð¥°¤¬¤¢¤ê¤Þ¤¹! ¤½¤ì¤ò¸«¤Ä¤±¤ÆÄ¾¤»¤ë¤«Ä©À路¤Æ¤ß¤Æ¤¯¤À¤µ¤¤¡£)