using System;
using System.Collections.Generic;

namespace AspClassic.Parser;

/// <summary>
/// A parse tree for a qualified name expression.
/// </summary>
public sealed class GenericQualifiedExpression : Expression
{
	private readonly Expression _Base;

	private readonly TypeArgumentCollection _TypeArguments;

	/// <summary>
	/// The base expression.
	/// </summary>
	public Expression Base => _Base;

	/// <summary>
	/// The qualifying type arguments.
	/// </summary>
	public TypeArgumentCollection TypeArguments => _TypeArguments;

	/// <summary>
	/// Constructs a new parse tree for a generic qualified expression.
	/// </summary>
	/// <param name="base">The base expression.</param>
	/// <param name="typeArguments">The qualifying type arguments.</param>
	/// <param name="span">The location of the parse tree.</param>
	public GenericQualifiedExpression(Expression @base, TypeArgumentCollection typeArguments, Span span)
		: base(TreeType.GenericQualifiedExpression, span)
	{
		if (@base == null)
		{
			throw new ArgumentNullException("base");
		}
		if (typeArguments == null)
		{
			throw new ArgumentNullException("typeArguments");
		}
		SetParent(@base);
		SetParent(typeArguments);
		_Base = @base;
		_TypeArguments = typeArguments;
	}

	protected override void GetChildTrees(IList<Tree> childList)
	{
		Tree.AddChild(childList, Base);
		Tree.AddChild(childList, TypeArguments);
	}
}