Next: Token Positions, Previous: Calling Convention, Up: Lexical [Contents][Index]
Ä̾ï¤ÎºÆÆþ²Äǽ¤Ç¤Ê¤¤¹½Ê¸²òÀÏ´ï¤Ç¤Ï¡¢
¥È¡¼¥¯¥ó¤Î°ÕÌ£Ãͤ¬¹°èÊÑ¿ôyylval¤ËÂåÆþ¤µ¤ì¤ëɬÍפ¬¤¢¤ê¤Þ¤¹¡£
°ÕÌ£ÃͤËÂФ·¤Æ¤¿¤À1¤Ä¤Î¥Ç¡¼¥¿·¿¤ò»È¤Ã¤Æ¤¤¤ë¾ì¹ç¤Ë¤Ï¡¢
yylval¤Î·¿¤â¤½¤¦¤Ç¤¹¡£
¤·¤¿¤¬¤Ã¤Æ¡¢¤¿¤È¤¨¤Ð¡¢Àë¸À¤ò¾Êά¤·¤Æ·¿¤¬int¤Ê¤é¤Ð¡¢
¼¡¤Î¤è¤¦¤Ë½ñ¤±¤Þ¤¹¡£
… yylval = value; /* ÃͤòBison¥¹¥¿¥Ã¥¯¤ËÀѤࡣ */ return INT; /* ¥È¡¼¥¯¥ó·¿¤òÊÖ¤¹¡£ */ …
Ê£¿ô¤Î¥Ç¡¼¥¿·¿¤ò»È¤Ã¤Æ¤¤¤ë¾ì¹ç¤Ë¤Ï¡¢
%unionÀë¸À¤Çºî¤é¤ì¤¿¶¦ÍÑÂΤ¬yylval¤Î·¿¤Ë¤Ê¤ê¤Þ¤¹
¡Êsee The Collection of Value Types¡Ë¡£
¤½¤³¤Ç¡¢¥È¡¼¥¯¥ó¤ÎÃͤòÂåÆþ¤¹¤ë¤Ë¤Ï¡¢
¶¦ÍÑÂΤΥá¥ó¥Ð¤Î̾Á°¤ò»ØÄꤹ¤ëɬÍפ¬¤¢¤ê¤Þ¤¹¡£
%unionÀë¸À¤ÎÎã¤ò¼¨¤·¤Þ¤¹¡£
%union {
int intval;
double val;
symrec *tptr;
}
¤¹¤ë¤È¡¢yylex¤ÎÃæ¤Î¥×¥í¥°¥é¥à¤Ï¼¡¤Î¤è¤¦¤Ë¤Ê¤ê¤Þ¤¹¡£
… yylval.intval = value; /* ÃͤòBison¥¹¥¿¥Ã¥¯¤ËÀѤࡣ */ return INT; /* ¥È¡¼¥¯¥ó·¿¤òÊÖ¤¹¡£ */ …