using System;

namespace AspClassic.Parser;

/// <summary>
/// A parse tree for an unary operator expression.
/// </summary>
public sealed class UnaryOperatorExpression : UnaryExpression
{
	private OperatorType _Operator;

	/// <summary>
	/// The operator.
	/// </summary>
	public OperatorType Operator => _Operator;

	/// <summary>
	/// Constructs a new unary operator expression parse tree.
	/// </summary>
	/// <param name="operator">The type of the unary operator.</param>
	/// <param name="operand">The operand of the operator.</param>
	/// <param name="span">The location of the parse tree.</param>
	public UnaryOperatorExpression(OperatorType @operator, Expression operand, Span span)
		: base(TreeType.UnaryOperatorExpression, operand, span)
	{
		if (@operator < OperatorType.UnaryPlus || @operator > OperatorType.Not)
		{
			throw new ArgumentOutOfRangeException("operator");
		}
		_Operator = @operator;
	}
}