typedef union {
	grammar*							pGrammar;
	production*						pProduction;
	lhs*								pLhs;
	std::vector<std::vector<expression*>*>*	pExpressionListList;
	std::vector<expression*>*			pExpressionList;
	expression*						pExpression;
	base*								pBase;
	alternation*					pAlternation;
	std::string*					pString;
} YYSTYPE;
#define	IDENT	257
#define	LITERAL	258
#define	SEPARATOR	259
#define	TERMINATOR	260
#define	OR	261
#define	OPT	262
#define	STAR	263
#define	PLUS	264
#define	LPAREN	265
#define	RPAREN	266
#define	COMMENT	267


extern YYSTYPE yylval;