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

namespace Microsoft.CodeAnalysis.CSharp;

internal sealed class BoundConstantPattern : BoundPattern
{
	public BoundExpression Value { get; }

	public ConstantValue ConstantValue { get; }

	public BoundConstantPattern(SyntaxNode syntax, BoundExpression value, ConstantValue constantValue, TypeSymbol inputType, TypeSymbol narrowedType, bool hasErrors = false)
		: base(BoundKind.ConstantPattern, syntax, inputType, narrowedType, hasErrors || value.HasErrors())
	{
		Value = value;
		ConstantValue = constantValue;
	}

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

	public BoundConstantPattern Update(BoundExpression value, ConstantValue constantValue, TypeSymbol inputType, TypeSymbol narrowedType)
	{
		if (value != Value || constantValue != ConstantValue || !TypeSymbol.Equals(inputType, base.InputType, (TypeCompareKind)0) || !TypeSymbol.Equals(narrowedType, base.NarrowedType, (TypeCompareKind)0))
		{
			BoundConstantPattern boundConstantPattern = new BoundConstantPattern(Syntax, value, constantValue, inputType, narrowedType, base.HasErrors);
			boundConstantPattern.CopyAttributes(this);
			return boundConstantPattern;
		}
		return this;
	}
}