using System.Diagnostics;
using Microsoft.CodeAnalysis.CSharp.Symbols;

namespace Microsoft.CodeAnalysis.CSharp;

internal sealed class BoundSwitchLabel : BoundNode
{
	public LabelSymbol Label { get; }

	public BoundPattern Pattern { get; }

	public BoundExpression? WhenClause { get; }

	public BoundSwitchLabel(SyntaxNode syntax, LabelSymbol label, BoundPattern pattern, BoundExpression? whenClause, bool hasErrors = false)
		: base(BoundKind.SwitchLabel, syntax, hasErrors || pattern.HasErrors() || whenClause.HasErrors())
	{
		Label = label;
		Pattern = pattern;
		WhenClause = whenClause;
	}

	[DebuggerStepThrough]
	public override BoundNode? Accept(BoundTreeVisitor visitor)
	{
		return visitor.VisitSwitchLabel(this);
	}

	public BoundSwitchLabel Update(LabelSymbol label, BoundPattern pattern, BoundExpression? whenClause)
	{
		if (!SymbolEqualityComparer.ConsiderEverything.Equals(label, Label) || pattern != Pattern || whenClause != WhenClause)
		{
			BoundSwitchLabel boundSwitchLabel = new BoundSwitchLabel(Syntax, label, pattern, whenClause, base.HasErrors);
			boundSwitchLabel.CopyAttributes(this);
			return boundSwitchLabel;
		}
		return this;
	}
}