using System;
using System.Collections.Generic;

namespace AspClassic.Parser;

/// <summary>
/// A parse tree for a New expression.
/// </summary>
public sealed class NewExpression : Expression
{
	private readonly TypeName _Target;

	private readonly ArgumentCollection _Arguments;

	/// <summary>
	/// The target type to create.
	/// </summary>
	public TypeName Target => _Target;

	/// <summary>
	/// The arguments to the constructor.
	/// </summary>
	public ArgumentCollection Arguments => _Arguments;

	/// <summary>
	/// Constructs a new parse tree for a New expression.
	/// </summary>
	/// <param name="target">The target type to create.</param>
	/// <param name="arguments">The arguments to the constructor.</param>
	/// <param name="span">The location of the parse tree.</param>
	public NewExpression(TypeName target, ArgumentCollection arguments, Span span)
		: base(TreeType.NewExpression, span)
	{
		if (target == null)
		{
			throw new ArgumentNullException("target");
		}
		SetParent(target);
		SetParent(arguments);
		_Target = target;
		_Arguments = arguments;
	}

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