using System.Collections.Immutable;
using Roslyn.Utilities;

namespace Microsoft.CodeAnalysis.CSharp.Symbols;

internal sealed class TupleVirtualElementFieldSymbol : TupleElementFieldSymbol
{
	private readonly string _name;

	private readonly bool _cannotUse;

	public override string Name => _name;

	internal override int? TypeLayoutOffset => null;

	public override FieldSymbol OriginalDefinition => this;

	public override bool IsVirtualTupleField => true;

	public TupleVirtualElementFieldSymbol(NamedTypeSymbol container, FieldSymbol underlyingField, string name, int tupleElementIndex, ImmutableArray<Location> locations, bool cannotUse, bool isImplicitlyDeclared, FieldSymbol? correspondingDefaultFieldOpt)
		: base(container, underlyingField, tupleElementIndex, locations, isImplicitlyDeclared, correspondingDefaultFieldOpt)
	{
		_name = name;
		_cannotUse = cannotUse;
	}

	internal override UseSiteInfo<AssemblySymbol> GetUseSiteInfo()
	{
		//IL_003a: Unknown result type (might be due to invalid IL or missing references)
		//IL_0033: Unknown result type (might be due to invalid IL or missing references)
		if (_cannotUse)
		{
			return new UseSiteInfo<AssemblySymbol>((DiagnosticInfo)(object)new CSDiagnosticInfo(ErrorCode.ERR_TupleInferredNamesNotAvailable, _name, new CSharpRequiredLanguageVersion(MessageID.IDS_FeatureInferredTupleNames.RequiredVersion())));
		}
		return base.GetUseSiteInfo();
	}

	internal override TypeWithAnnotations GetFieldType(ConsList<FieldSymbol> fieldsBeingBound)
	{
		return _underlyingField.GetFieldType(fieldsBeingBound);
	}

	public override ImmutableArray<CSharpAttributeData> GetAttributes()
	{
		return _underlyingField.GetAttributes();
	}

	internal override FieldSymbol AsMember(NamedTypeSymbol newOwner)
	{
		NamedTypeSymbol newUnderlyingOwner = GetNewUnderlyingOwner(newOwner);
		FieldSymbol correspondingDefaultFieldOpt = null;
		if ((object)_correspondingDefaultField != this)
		{
			correspondingDefaultFieldOpt = _correspondingDefaultField.OriginalDefinition.AsMember(newOwner);
		}
		return new TupleVirtualElementFieldSymbol(newOwner, _underlyingField.OriginalDefinition.AsMember(newUnderlyingOwner), _name, TupleElementIndex, Locations, _cannotUse, IsImplicitlyDeclared, correspondingDefaultFieldOpt);
	}
}