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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;
using System.Collections.Immutable;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.Diagnostics;
using Microsoft.CodeAnalysis.Operations;
namespace Roslyn.Diagnostics.Analyzers
{
using static RoslynDiagnosticsAnalyzersResources;
[DiagnosticAnalyzer(LanguageNames.CSharp, LanguageNames.VisualBasic)]
public sealed class NamedTypeFullNameNotNullSuppressor : DiagnosticSuppressor
{
private const string Id = RoslynDiagnosticIds.NamedTypeFullNameNotNullSuppressionRuleId;
// CS8600: Converting null literal or possible null value to non-nullable type
private const string CS8600 = nameof(CS8600);
// CS8603: Possible null reference return
private const string CS8603 = nameof(CS8603);
// CS8604: Possible null reference argument for parameter 'name' in 'method'
private const string CS8604 = nameof(CS8604);
private static readonly LocalizableString s_localizableJustification = CreateLocalizableResourceString(nameof(NamedTypeFullNameNotNullSuppressorJustification));
internal static readonly SuppressionDescriptor CS8600Rule = new(Id, CS8600, s_localizableJustification);
internal static readonly SuppressionDescriptor CS8603Rule = new(Id, CS8603, s_localizableJustification);
internal static readonly SuppressionDescriptor CS8604Rule = new(Id, CS8604, s_localizableJustification);
public override ImmutableArray<SuppressionDescriptor> SupportedSuppressions { get; } = ImmutableArray.Create(CS8600Rule, CS8603Rule, CS8604Rule);
public override void ReportSuppressions(SuppressionAnalysisContext context)
{
foreach (var diagnostic in context.ReportedDiagnostics)
{
if (diagnostic.Location.SourceTree is not { } tree)
{
continue;
}
var root = tree.GetRoot(context.CancellationToken);
var node = root.FindNode(diagnostic.Location.SourceSpan, getInnermostNodeForTie: true);
var semanticModel = context.GetSemanticModel(tree);
var operation = semanticModel.GetOperation(node, context.CancellationToken);
if (operation is IPropertyReferenceOperation { Property.Name: nameof(Type.FullName), Instance: ITypeOfOperation { } })
{
context.ReportSuppression(Suppression.Create(GetDescriptor(diagnostic), diagnostic));
}
}
}
private static SuppressionDescriptor GetDescriptor(Diagnostic diagnostic)
{
return diagnostic.Id switch
{
CS8600 => CS8600Rule,
CS8603 => CS8603Rule,
CS8604 => CS8604Rule,
_ => throw new NotSupportedException(),
};
}
}
}
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