symbol.cs

c--解释器

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

namespace compiler
{
    class Symbol
    {
        //名字
        string name;

        //类型
        int type;

        //int 值
        int valueInt;

        //real 值
        double valueReal;

        //数组元素个数
        int count;

        //是否数组
        bool isArray;

        //是否方法
        bool isFunction;

        //是否形式参数
        bool isReference;

        //方法节点
        TreeNode the_function;

        //关于 int  常量 变量的构造函数
        public Symbol(string namefrom, int typefrom, int valueIntfrom)
        {
            this.name = namefrom;
            this.type = typefrom;
            this.valueInt = valueIntfrom;
        }


        //关于 real 常量 变量的构造函数
        public Symbol(string namefrom, int typefrom, double valueRealfrom)
        {
            this.name = namefrom;
            this.type = typefrom;
            this.valueReal = valueRealfrom;
        }


        //关于 数组 的构造函数
        public Symbol(string namefrom, int typefrom, int countfrom, bool isArrayfrom)
        {
            this.name = namefrom;
            this.type = typefrom;
            this.count = countfrom;
            this.isArray = isArrayfrom;
        }


        //关于 函数 的构造函数
        public Symbol(string namefrom,  bool isFunctionfrom, TreeNode the_function_from)
        {
            this.name = namefrom;
            
            this.isFunction = isFunctionfrom;
            this.the_function = the_function_from;
        }


        //关于 形式参数 的构造函数
        public Symbol(string namefrom, int typefrom, bool isFunctionfrom, bool isReferencefrom)
        {
            this.name = namefrom;
            this.type = typefrom;
            this.isFunction = isFunctionfrom;
            this.isReference = isReferencefrom;
        }


        //返回方法节点
        public TreeNode getFunction()
        {
            return this.the_function;
        }


        //返回名字
        public string getName()
        {
            return this.name;
        }

        //是否方法
        public bool isTheFunction()
        {
            return this.isFunction;
        }

        // 返回类型
        public int getType()
        {
            return this.type;
        }
        //返回int值 只有 int型才能返回int
        public int getIntValue()
        {
            if (this.type == 1)
            { return this.valueInt; }
            else { throw new Exception("数值类型错误"); }
        }
        //返回real值 不论 int real 都能返回int
        public double getRealValue()
        {
            if (this.type == 1)
            { return (double)this.valueInt; }
            else { return this.valueReal; }

        }

        //是否数组
        public bool isTheArray()
        {
            return this.isArray;
        }

        //返回数组元素个数
        public int getElemCount()
        {
            return this.count;
        }

        //返回数组类型
        public int getArrayType()
        {
            return this.type;
        }
        //更改 int 值
        public bool changeInt(int newValue) 
        {
            if (this.type == 1)
            {
                this.valueInt = newValue;
                return true;
            }
            else { return false; }
        }
        //更改 real 值
        public bool changeReal(double newValue)
        {
            if (this.type == 2)
            {
                this.valueReal = newValue;
                return true;
            }
            else 
            {
                return false;
            }
        }

        //是否int变量
        public bool isIntVar() 
        {
            return (!this.isTheArray()) && (!this.isFunction) && (this.type == 1);
        }
        //是否real变量
        public bool isRealVar() 
        {
            return (!this.isTheArray()) && (!this.isFunction) && (this.type == 2);
        }
    }
}