using Microsoft.CodeAnalysis.CSharp.Syntax.InternalSyntax;

namespace Microsoft.CodeAnalysis.CSharp.Syntax;

public sealed class IsPatternExpressionSyntax : ExpressionSyntax
{
	private ExpressionSyntax? expression;

	private PatternSyntax? pattern;

	public ExpressionSyntax Expression => ((SyntaxNode)this).GetRedAtZero<ExpressionSyntax>(ref expression);

	public SyntaxToken IsKeyword => new SyntaxToken((SyntaxNode)(object)this, (GreenNode)(object)((Microsoft.CodeAnalysis.CSharp.Syntax.InternalSyntax.IsPatternExpressionSyntax)(object)((SyntaxNode)this).Green).isKeyword, ((SyntaxNode)this).GetChildPosition(1), ((SyntaxNode)this).GetChildIndex(1));

	public PatternSyntax Pattern => ((SyntaxNode)this).GetRed<PatternSyntax>(ref pattern, 2);

	internal IsPatternExpressionSyntax(Microsoft.CodeAnalysis.CSharp.Syntax.InternalSyntax.CSharpSyntaxNode green, SyntaxNode? parent, int position)
		: base(green, parent, position)
	{
	}

	internal override SyntaxNode? GetNodeSlot(int index)
	{
		return (SyntaxNode?)(index switch
		{
			0 => ((SyntaxNode)this).GetRedAtZero<ExpressionSyntax>(ref expression), 
			2 => ((SyntaxNode)this).GetRed<PatternSyntax>(ref pattern, 2), 
			_ => null, 
		});
	}

	internal override SyntaxNode? GetCachedSlot(int index)
	{
		return (SyntaxNode?)(index switch
		{
			0 => expression, 
			2 => pattern, 
			_ => null, 
		});
	}

	public override void Accept(CSharpSyntaxVisitor visitor)
	{
		visitor.VisitIsPatternExpression(this);
	}

	public override TResult? Accept<TResult>(CSharpSyntaxVisitor<TResult> visitor)
	{
		return visitor.VisitIsPatternExpression(this);
	}

	public IsPatternExpressionSyntax Update(ExpressionSyntax expression, SyntaxToken isKeyword, PatternSyntax pattern)
	{
		//IL_0021: Unknown result type (might be due to invalid IL or missing references)
		//IL_0009: Unknown result type (might be due to invalid IL or missing references)
		//IL_000b: Unknown result type (might be due to invalid IL or missing references)
		if (expression != Expression || isKeyword != IsKeyword || pattern != Pattern)
		{
			IsPatternExpressionSyntax isPatternExpressionSyntax = SyntaxFactory.IsPatternExpression(expression, isKeyword, pattern);
			SyntaxAnnotation[] annotations = ((SyntaxNode)this).GetAnnotations();
			if (annotations == null || annotations.Length == 0)
			{
				return isPatternExpressionSyntax;
			}
			return isPatternExpressionSyntax.WithAnnotations(annotations);
		}
		return this;
	}

	public IsPatternExpressionSyntax WithExpression(ExpressionSyntax expression)
	{
		//IL_0003: Unknown result type (might be due to invalid IL or missing references)
		return Update(expression, IsKeyword, Pattern);
	}

	public IsPatternExpressionSyntax WithIsKeyword(SyntaxToken isKeyword)
	{
		//IL_0007: Unknown result type (might be due to invalid IL or missing references)
		return Update(Expression, isKeyword, Pattern);
	}

	public IsPatternExpressionSyntax WithPattern(PatternSyntax pattern)
	{
		//IL_0008: Unknown result type (might be due to invalid IL or missing references)
		return Update(Expression, IsKeyword, pattern);
	}
}