/// <summary>
/// Creates a Node containing the specified Operator and argument.
/// This will automatically mark this Node as a TYPE_EXPRESSION
/// </summary>
/// <param name="parser"></param>
/// <param name="op">the string representing an operator</param>
/// <param name="arg1">the argument to the specified operator</param>
internal OperatorNode(Operator op, Node arg1)
{
_arg1 = arg1;
_operator = op;
}
/// <summary>
/// Creates a Node containing the specified Operator and arguments.
/// This will automatically mark this Node as a TYPE_EXPRESSION
/// </summary>
/// <param name="parser"></param>
/// <param name="op">the string representing an operator</param>
/// <param name="arg1">the first argument to the specified operator</param>
/// <param name="arg2">the second argument to the specified operator</param>
internal OperatorNode(Operator op, Node arg1, Node arg2)
{
_arg1 = arg1;
_arg2 = arg2;
_operator = op;
}