%option prefix="expr_"%option reentrant%option bison-bridge %{#include <linux/compiler.h>#include "expr.h"#include "expr-bison.h" char *expr_get_text(yyscan_t yyscanner);YYSTYPE *expr_get_lval(yyscan_t yyscanner); static int __value(YYSTYPE *yylval, char *str, int base, int token){	u64 num; 	errno = 0;	num = strtoull(str, NULL, base);	if (errno)		return EXPR_ERROR; 	yylval->num = num;	return token;} static int value(yyscan_t scanner, int base){	YYSTYPE *yylval = expr_get_lval(scanner);	char *text = expr_get_text(scanner); 	return __value(yylval, text, base, NUMBER);} /* * Allow @ instead of / to be able to specify pmu/event/ without * conflicts with normal division. */static char *normalize(char *str){	char *ret = str;	char *dst = str; 	while (*str) {		if (*str == '@')			*dst++ = '/';		else if (*str == '\\')			*dst++ = *++str;		else			*dst++ = *str;		str++;	} 	*dst = 0x0;	return ret;} static int str(yyscan_t scanner, int token){	YYSTYPE *yylval = expr_get_lval(scanner);	char *text = expr_get_text(scanner); 	yylval->str = normalize(strdup(text));	if (!yylval->str)		return EXPR_ERROR; 	yylval->str = normalize(yylval->str);	return token;}%} number		[0-9]+ sch		[-,=]spec		\\{sch}sym		[0-9a-zA-Z_\.:@]+symbol		{spec}*{sym}*{spec}*{sym}* %%	{		int start_token; 		start_token = expr_get_extra(yyscanner); 		if (start_token) {			expr_set_extra(NULL, yyscanner);			return start_token;		}	} max		{ return MAX; }min		{ return MIN; }if		{ return IF; }else		{ return ELSE; }#smt_on		{ return SMT_ON; }{number}	{ return value(yyscanner, 10); }{symbol}	{ return str(yyscanner, ID); }"|"		{ return '|'; }"^"		{ return '^'; }"&"		{ return '&'; }"-"		{ return '-'; }"+"		{ return '+'; }"*"		{ return '*'; }"/"		{ return '/'; }"%"		{ return '%'; }"("		{ return '('; }")"		{ return ')'; }","		{ return ','; }.		{ }%% int expr_wrap(void *scanner __maybe_unused){	return 1;}