treenode.cs

c--解释器

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

namespace compiler
{
    class TreeNode
    {
        //child
        ArrayList child = new ArrayList();

        //用户数字表示不同种类的构造函数
        int type;

       //拥有孩子的个数
        int numberOfChildren=0;
       
        
        //constructor
        public TreeNode(int typefrom) 
        {
            this.type = typefrom;
        
        }

        //语义分析时候使用的
        public void action() 
        {
           

        }

      
        //添加节点孩子
        public bool addChildren(TreeNode oneChild) 
        {
            try {

                this.child.Add(oneChild);
                this.numberOfChildren++;
                return true;
            }
            catch (Exception e) 
            {

                Console.WriteLine(e.ToString());
                return false;
            
            }
                }

        //添加token孩子
        public bool addChildren(Token oneChild) 
        {
            try
            {

                this.child.Add(oneChild);
                this.numberOfChildren++;
                return true;
            }
            catch (Exception e)
            {

                Console.WriteLine(e.ToString());
                return false;

            }
        
        
        }

        
        
        //返回非终结符的名字

        public string getName() 
        {
            switch (this.type) 
            {
                case -1: return "树顶";
                
                case 0: return "程序";
                    
                case 1: return "分程序";
                    
                case 2: return "全局声明";
                    
                case 3: return "常量声明";
                    
                case 4 : return "常量定义";
                      
                case 5: return "数组声明";
                     
                case 6: return "数组定义";
                
                case 7: return "变量声明";
                
                case 8: return "变量定义";
                
                case 9: return "方法部分";
                
                case 10: return "参数说明";
                
                case 11: return "参数定义";

                case 12: return "返回类型";

                case 13: return "方法体";
                
                case 14: return "方法体内容";
                
                case 15: return "方法调用";
                
                case 16: return "传参数";
              
                case 17: return "数组元素赋值";
                
                case 18: return "表达式";
               
                case 19: return "项";
                
                case 20: return "因子";
                
                case 21: return "数组元素";
                
                case 22: return "变量赋值语句";
                
                case 23: return "条件语句";
               
                case 24: return "条件";
                case 25: return "循环语句";
                case 26: return "读语句";
                case 27: return "写语句";
                case 28: return "返回语句";
                
                default: return "wrong";
                      
            }
        
        }

        //返回孩子的个数
        public int getChildCount() 
        {
            return this.numberOfChildren;
        }

        //选中一个孩子
        public Object getAChild(int index) 
        {
            return (this.child[index]);
        }

        //返回当前节点的类型
        public int getType() 
        {
            return this.type;
        }
    }
}