public ConstStringContext(string param_, int no_)
            : base(param_, no_)
        {
            this.Parse();

            ProgramNodefactory fac = new ProgramNodefactory();
            this.node = fac.Create(this);
        }
        public RandomMySQLTableContext(string param_, int no_)
            : base(param_,no_)
        {
            this.Parse();

            ProgramNodefactory fac = new ProgramNodefactory();
            this.node = fac.Create(this);
        }