using System;
using System.Collections.Generic;

namespace AspClassic.Parser;

/// <summary>
/// A read-only collection of modifiers.
/// </summary>
public sealed class ModifierCollection : TreeCollection<Modifier>
{
	private readonly ModifierTypes _ModifierTypes;

	/// <summary>
	/// All the modifiers in the collection.
	/// </summary>
	public ModifierTypes ModifierTypes => _ModifierTypes;

	/// <summary>
	/// Constructs a collection of modifiers.
	/// </summary>
	/// <param name="modifiers">The modifiers in the collection.</param>
	/// <param name="span">The location of the parse tree.</param>
	public ModifierCollection(IList<Modifier> modifiers, Span span)
		: base(TreeType.ModifierCollection, modifiers, span)
	{
		if (modifiers == null || modifiers.Count == 0)
		{
			throw new ArgumentException("ModifierCollection cannot be empty.");
		}
		foreach (Modifier Modifier in modifiers)
		{
			_ModifierTypes |= Modifier.ModifierType;
		}
	}
}