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KTUG FAQ

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FrontPage › LittleTree/ReadingTeXbook/2006-08
Aug 26, 2006
\aftergroup
Submitted by ÀÛÀº³ª¹« @ 08-26 [11:08 pm]
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\aftergroup<ÅäÅ«>
\aftergroupÀº ±× ´ÙÀ½¿¡ ³ª¿À´Â <ÅäÅ«>À» ÀÏ´Ü ÀúÀåÇØ µÎ¾ú´Ù°¡ ÇöÀç »ç¿ëµÇ°í ÀÖ´Â ±×·ìÀÌ ³¡³­ ´ÙÀ½¿¡ <ÅäÅ«>ÀÌ »ç¿ëµË´Ï´Ù. ¿¹¸¦ µé¸é,
\def\abc{\catcode... \xyz}
\def\xyz#1{...}
...
\abc{argument}
À§ÀÇ ¿¹¿¡¼­ ¾Ë ¼ö ÀÖµíÀÌ argument´Â \catcode¿¡ ÀÇÇؼ­ ¾î¶² catcodeµéÀÌ º¯°æ µÈ ´ÙÀ½¿¡ \xyzÀÇ ÀÎÀÚ·Î »ç¿ëµË´Ï´Ù. À§ÀÇ ¿¹´Â \aftergroupÀ» »ç¿ëÇÏ¸é ´ÙÀ½°ú °°ÀÌ µË´Ï´Ù.
\def\abc{\catcode... \bgroup\aftergroup\xyz\let\dummy=}
...
\abc{...}
\bgroupÀ¸·Î ÀÏ´Ü ±×·ìÀÌ ½ÃÀ۵ǰí, \aftergroup¿¡ ÀÇÇؼ­ \xyz°¡ ÀúÀåµË´Ï´Ù. ±×¸®°í \bgroup¿¡ ÀÇÇؼ­ ½ÃÀÛµÈ ±×·ìÀÌ ³¡³­ ´ÙÀ½¿¡ \xyz°¡ »ç¿ëµË´Ï´Ù. Àß »ìÆ캼 °ÍÀº \let¿¡ ÀÇÇؼ­ \abcÀÇ ¿ÞÂÊ °ýÈ£ "{"°¡ Èí¼öµÈ´Ù´Â °ÍÀÔ´Ï´Ù. µû¶ó¼­ \abc°¡ ÇÏ´Â ÀÏÀº ¸ÕÀú catcodeµéÀ» º¯°æ ½ÃÅ°°í, ±×·ìÀ» ½ÃÀÛÇÏ°í, \xyz¸¦ ÀúÀåÇÏ°í "{"¸¦ Èí¼öÇÏ°í ÀÎÀÚµéÀ» ÀÐ¾î µéÀÌ°í ¸¶Áö¸·À¸·Î ±×·ìÀ» ´Ý½À´Ï´Ù. ±×¸®°í ³ª¼­ ¸ÅÅ©·Î \xyz°¡ Àü°³µÇ´Â °ÍÀÔ´Ï´Ù.
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