using System;

namespace AspClassic.Parser;

/// <summary>
/// A parse tree for a string literal expression.
/// </summary>
public sealed class StringLiteralExpression : LiteralExpression
{
	private readonly string _Literal;

	/// <summary>
	/// The literal value.
	/// </summary>
	public string Literal => _Literal;

	public override object Value => _Literal;

	/// <summary>
	/// Constructs a new string literal expression parse tree.
	/// </summary>
	/// <param name="literal">The literal value.</param>
	/// <param name="span">The location of the parse tree.</param>
	public StringLiteralExpression(string literal, Span span)
		: base(TreeType.StringLiteralExpression, span)
	{
		if (literal == null)
		{
			throw new ArgumentNullException("literal");
		}
		_Literal = literal;
	}
}