#define DEBUG
using System.Collections.Generic;
using System.Diagnostics;

namespace AspClassic.Parser;

/// <summary>
/// A parse tree for an expression statement.
/// </summary>
public abstract class ExpressionStatement : Statement
{
	private readonly Expression _Expression;

	/// <summary>
	/// The expression.
	/// </summary>
	public Expression Expression => _Expression;

	/// <summary>
	/// Constructs a new parse tree for an expression statement.
	/// </summary>
	/// <param name="type">The type of the parse tree.</param>
	/// <param name="expression">The expression.</param>
	/// <param name="span">The location of the parse tree.</param>
	/// <param name="comments">The comments for the parse tree.</param>
	protected ExpressionStatement(TreeType type, Expression expression, Span span, IList<Comment> comments)
		: base(type, span, comments)
	{
		Debug.Assert(type == TreeType.ReturnStatement || type == TreeType.ErrorStatement || type == TreeType.ThrowStatement);
		SetParent(expression);
		_Expression = expression;
	}

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