public Statement(StatementType type, string label, List<string> arguments, int length)
 {
     _type = type;
     _label = label;
     _arguments = arguments;
     _length = length;
     Location = 0;
 }
 public Instruction(StatementType type, string label, List<string> arguments, int length)
     : base(type, label, arguments, length)
 {
 }
 public Directive(StatementType type, string label, List<string> arguments, int length)
     : base(type, label, arguments, length)
 {
 }