#ifndef	PARSER_H
#define PARSER_H
#define PARSER_DEBUG
#include"scanner.h"

typedef double(*FuncPtr)(double);
struct ExprNode       //語法樹結點類型
{
	enum Token_Type OpCode; //PLUS,MINUS,MUL,DIV,POWER,FUNC,CONST_ID等
	union
	{
		struct{ExprNode *Left,*Right;} CaseOperator;
		struct{ExprNode *Child;FuncPtr MathFuncPtr;} CaseFunc;
		double CaseConst;
		double *CaseParmPtr;
	}Content;
};

extern void Parser(char *SrcFilePtr)  ;//語法分析器對外的接口

#endif