// 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.Collections.Immutable;
 
namespace Microsoft.CodeAnalysis.Diagnostics;
 
/// <summary>
/// A placeholder singleton analyzer. Its only purpose is to represent generator-produced diagnostics in maps that are keyed by <see cref="DiagnosticAnalyzer"/>.
/// </summary>
internal sealed class GeneratorDiagnosticsPlaceholderAnalyzer : DiagnosticAnalyzer
{
    internal static readonly GeneratorDiagnosticsPlaceholderAnalyzer Instance = new();
 
    private GeneratorDiagnosticsPlaceholderAnalyzer()
    {
    }
 
    // We don't have any diagnostics to directly state here, since it could be any underlying type.
    public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics => [];
 
#pragma warning disable RS1026 // Enable concurrent execution
#pragma warning disable RS1025 // Configure generated code analysis
    public sealed override void Initialize(AnalysisContext context) { }
#pragma warning restore RS1025 // Configure generated code analysis
#pragma warning restore RS1026 // Enable concurrent execution
}