// 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 Microsoft.CodeAnalysis.CSharp.Extensions;
using Microsoft.CodeAnalysis.CSharp.LanguageService;
using Microsoft.CodeAnalysis.Diagnostics;
using Microsoft.CodeAnalysis.LanguageService;
using Microsoft.CodeAnalysis.UseIsNullCheck;
 
namespace Microsoft.CodeAnalysis.CSharp.UseIsNullCheck;
 
[DiagnosticAnalyzer(LanguageNames.CSharp)]
internal class CSharpUseIsNullCheckForReferenceEqualsDiagnosticAnalyzer : AbstractUseIsNullCheckForReferenceEqualsDiagnosticAnalyzer<SyntaxKind>
{
    public CSharpUseIsNullCheckForReferenceEqualsDiagnosticAnalyzer()
        : base(CSharpAnalyzersResources.Use_is_null_check)
    {
    }
 
    protected override bool IsLanguageVersionSupported(Compilation compilation)
        => compilation.LanguageVersion() >= LanguageVersion.CSharp7;
 
    protected override bool IsUnconstrainedGenericSupported(Compilation compilation)
        => compilation.LanguageVersion() >= LanguageVersion.CSharp8;
 
    protected override ISyntaxFacts GetSyntaxFacts()
        => CSharpSyntaxFacts.Instance;
}