/// <summary>
 ///向字典中加入一个变量的状态
 /// </summary>
 /// <param name="item"></param>
 public void Add(RuntimeItem item)
 {
     if (!isExists(item.VarName))
     {
         dic.Add(item.VarName, item);
     }
 }
        /// <summary>
        /// IdentityGroup
        /// </summary>
        private void IdentityGroupGram()
        {
            if (this.varTable.GetItem(this.matchIndex).varType == ConstTable.VariableType.Identity)
            {
                this.matchIndex++;
            }
            RuntimeItem item1 = new RuntimeItem(this.varTable.GetItem(this.matchIndex - 1).varValue, 0, false);

            this.RuntimeVarTb.Add(item1);
            IdentityGroup_Gram();
        }