expressatom.cs

编译原理语法分析和词法分析综合实验： 源程序、可执行程序、测试程序文件、程序运行说明文件、实验报告。

using System;
using System.Collections.Generic;
using System.Text;

namespace syn
{
    public class ExpressAtom
    {
        private Operand _operand = null;
        private Operator _operator = null;
        private ExpressAtomEnum atomType;

        public ExpressAtom(Operand operand)
        {
            this._operand = operand;
            atomType = ExpressAtomEnum.Operand;
        }

        public ExpressAtom(Operator operater)
        {
            this._operator = operater;
            atomType = ExpressAtomEnum.Operator;
        }

        public Operand Operand
        {
            get { return this._operand; }            
        }

        public Operator Operator
        {
            get { return this._operator; }
        }

        public ExpressAtomEnum AtomType
        {
            get
            {
                return this.atomType;
            }
        }

        public override string ToString()
        {
            return atomType == ExpressAtomEnum.Operand ?_operand.ToString(): _operator.ToString()  ;
        }

    }
}