parser.h

简单绘图语言

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

typedef double(*FuncPtr)(double);
struct ExprNode                 //语法树节点类型
{
	enum Token_Type OpCode;
	union
	{
		struct {ExprNode *Left, *Right;}CaseOperator;
		struct {ExprNode *Child;FuncPtr MathFuncPtr;}CaseFunc;
		double CaseConst;
		double *CaseParmPtr;
	}Content;
};
extern void Parser(char *SrcFilePtr);   //语法分析器对外的接口
#endif