typedef union {
	Inst *inst;    /* 指令 */
	symrec *tptr;  /* 符號表指針 */
	int narg;      /* 參數 */
	int delim;     /* 分界符(不存入符號表中) */
	int op;		   /* 操作符(不存入符號表中) */
	char *str;	   /* 字符串(不存入符號表中) */
} YYSTYPE;
#define	NL	258
#define	COMMA	259
#define	LP	260
#define	RP	261
#define	LB	262
#define	RB	263
#define	MINUSMINUS	264
#define	PLUSPLUS	265
#define	PLUSMINUS	266
#define	MINUSPLUS	267
#define	NUMBER	268
#define	CONST	269
#define	VAR	270
#define	BLTIN	271
#define	UNDEF	272
#define	PRINT	273
#define	WHILE	274
#define	IF	275
#define	ELSE	276
#define	FUNCTION	277
#define	PROCEDURE	278
#define	RETURN	279
#define	FUNC	280
#define	PROC	281
#define	READ	282
#define	ARG	283
#define	STRING	284
#define	AS	285
#define	OR	286
#define	AND	287
#define	GT	288
#define	GE	289
#define	LT	290
#define	LE	291
#define	EQ	292
#define	NE	293
#define	PLUS	294
#define	MINUS	295
#define	MUL	296
#define	DIV	297
#define	NEG	298
#define	POS	299
#define	NOT	300
#define	POW	301


extern YYSTYPE yylval;