parser.h

一个采用面向对象实现编译解释器,自己验证过绝对能用.

#ifndef PARSER_H
#define PARSER_H
#include "scanner.h"
typedef double(*FuncPtr)(double);
struct ExprNode
{
	enum Token_Type OpCode;
	//PLUS,MINUS,MUL,DIV
	union 
	{
		struct{ExprNode *Left,*Right;}CaseOperator;
		struct{ExprNode *Child;FuncPtr MathFuncPtr;}CaseFunc;
		double CaseConst;
		double *CaseParmPtr;
	}Content;
};
extern void Parser(char *SrcFilePtr);
#endif