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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Threading;
using Roslyn.Utilities;
namespace Microsoft.CodeAnalysis.CSharp.Symbols.PublicModel
{
internal sealed class DiscardSymbol : Symbol, IDiscardSymbol
{
private readonly Symbols.DiscardSymbol _underlying;
private ITypeSymbol? _lazyType;
public DiscardSymbol(Symbols.DiscardSymbol underlying)
{
RoslynDebug.Assert(underlying != null);
_underlying = underlying;
}
internal override CSharp.Symbol UnderlyingSymbol => _underlying;
ITypeSymbol IDiscardSymbol.Type
{
get
{
if (_lazyType is null)
{
Interlocked.CompareExchange(ref _lazyType, _underlying.TypeWithAnnotations.GetPublicSymbol(), null);
}
return _lazyType;
}
}
CodeAnalysis.NullableAnnotation IDiscardSymbol.NullableAnnotation => _underlying.TypeWithAnnotations.ToPublicAnnotation();
protected override void Accept(SymbolVisitor visitor) => visitor.VisitDiscard(this);
protected override TResult? Accept<TResult>(SymbolVisitor<TResult> visitor) where TResult : default => visitor.VisitDiscard(this);
protected override TResult Accept<TArgument, TResult>(SymbolVisitor<TArgument, TResult> visitor, TArgument argument) => visitor.VisitDiscard(this, argument);
}
}
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