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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.
namespace Microsoft.CodeAnalysis;
internal partial struct SymbolKey
{
private sealed class PointerTypeSymbolKey : AbstractSymbolKey<IPointerTypeSymbol>
{
public static readonly PointerTypeSymbolKey Instance = new();
public sealed override void Create(IPointerTypeSymbol symbol, SymbolKeyWriter visitor)
=> visitor.WriteSymbolKey(symbol.PointedAtType);
protected sealed override SymbolKeyResolution Resolve(
SymbolKeyReader reader, IPointerTypeSymbol? contextualSymbol, out string? failureReason)
{
var pointedAtTypeResolution = reader.ReadSymbolKey(contextualSymbol?.PointedAtType, out var pointedAtTypeFailureReason);
if (pointedAtTypeFailureReason != null)
{
failureReason = $"({nameof(PointerTypeSymbolKey)} {nameof(pointedAtTypeResolution)} failed -> {pointedAtTypeFailureReason})";
return default;
}
if (reader.Compilation.Language == LanguageNames.VisualBasic)
{
failureReason = $"({nameof(PointerTypeSymbolKey)} is not supported in {LanguageNames.VisualBasic})";
return default;
}
using var result = PooledArrayBuilder<IPointerTypeSymbol>.GetInstance(pointedAtTypeResolution.SymbolCount);
foreach (var typeSymbol in pointedAtTypeResolution.OfType<ITypeSymbol>())
result.AddIfNotNull(reader.Compilation.CreatePointerTypeSymbol(typeSymbol));
return CreateResolution(result, $"({nameof(PointerTypeSymbolKey)} could not resolve)", out failureReason);
}
}
}
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