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Improved performance of CA1041 #6671
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98 changes: 98 additions & 0 deletions
98
...rosoft.CodeQuality.Analyzers/ApiDesignGuidelines/CSharpProvideObsoleteAttributeMessage.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,98 @@ | ||
| // Copyright (c) Microsoft. All Rights Reserved. Licensed under the MIT license. See License.txt in the project root for license information. | ||
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| using Analyzer.Utilities.Extensions; | ||
| using Microsoft.CodeAnalysis; | ||
| using Microsoft.CodeAnalysis.CSharp; | ||
| using Microsoft.CodeAnalysis.CSharp.Syntax; | ||
| using Microsoft.CodeAnalysis.Diagnostics; | ||
| using Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines; | ||
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| namespace Microsoft.CodeQuality.CSharp.Analyzers.ApiDesignGuidelines | ||
| { | ||
| [DiagnosticAnalyzer(LanguageNames.CSharp)] | ||
| public sealed class CSharpProvideObsoleteAttributeMessageAnalyzer : ProvideObsoleteAttributeMessageAnalyzer | ||
| { | ||
| public override void Initialize(AnalysisContext context) | ||
| { | ||
| context.EnableConcurrentExecution(); | ||
| context.ConfigureGeneratedCodeAnalysis(GeneratedCodeAnalysisFlags.None); | ||
| context.RegisterSyntaxNodeAction(AnalyzeSyntaxNode, SyntaxKind.Attribute); | ||
| } | ||
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| private static void AnalyzeSyntaxNode(SyntaxNodeAnalysisContext context) | ||
| { | ||
| var attribute = (AttributeSyntax)context.Node; | ||
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| if (!IsObsoleteAttributeName(StripOffNamespace(attribute.Name).Identifier.Text)) | ||
| return; | ||
|
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| // We bail if the attribute has arguments, unless the first argument is null or empty. | ||
| if (attribute.ArgumentList is not null && attribute.ArgumentList.Arguments.Count > 0) | ||
| { | ||
| if (attribute.ArgumentList.Arguments[0].Expression is not LiteralExpressionSyntax literalExpression) | ||
| return; | ||
| if (!string.IsNullOrEmpty(literalExpression.Token.Value.ToString())) | ||
| return; | ||
| } | ||
|
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| string identifierName = string.Empty; | ||
| ISymbol? attributedSymbol = null; | ||
|
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| switch (attribute.Parent.Parent) | ||
| { | ||
| case TypeDeclarationSyntax typeDeclaration: | ||
| identifierName = typeDeclaration.Identifier.Text; | ||
| attributedSymbol = context.SemanticModel.GetDeclaredSymbol(typeDeclaration, context.CancellationToken); | ||
| break; | ||
| case ConstructorDeclarationSyntax constructorDeclaration: | ||
| identifierName = constructorDeclaration.Identifier.Text; | ||
| attributedSymbol = context.SemanticModel.GetDeclaredSymbol(constructorDeclaration, context.CancellationToken); | ||
| break; | ||
| case FieldDeclarationSyntax fieldDeclaration: | ||
| identifierName = fieldDeclaration.Declaration.Variables.ToString(); | ||
| attributedSymbol = context.SemanticModel.GetDeclaredSymbol(fieldDeclaration.Declaration.Variables[0], context.CancellationToken); | ||
| break; | ||
| case PropertyDeclarationSyntax propertyDeclaration: | ||
| identifierName = propertyDeclaration.Identifier.Text; | ||
| attributedSymbol = context.SemanticModel.GetDeclaredSymbol(propertyDeclaration, context.CancellationToken); | ||
| break; | ||
| case MethodDeclarationSyntax methodDeclaration: | ||
| identifierName = methodDeclaration.Identifier.Text; | ||
| attributedSymbol = context.SemanticModel.GetDeclaredSymbol(methodDeclaration, context.CancellationToken); | ||
| break; | ||
| case EventFieldDeclarationSyntax eventFieldDeclaration: | ||
| identifierName = eventFieldDeclaration.Declaration.Variables.ToString(); | ||
| attributedSymbol = context.SemanticModel.GetDeclaredSymbol(eventFieldDeclaration.Declaration.Variables[0], context.CancellationToken); | ||
| break; | ||
| case EventDeclarationSyntax eventDeclaration: | ||
| identifierName = eventDeclaration.Identifier.Text; | ||
| attributedSymbol = context.SemanticModel.GetDeclaredSymbol(eventDeclaration, context.CancellationToken); | ||
| break; | ||
| case DelegateDeclarationSyntax delegateDeclaration: | ||
| identifierName = delegateDeclaration.Identifier.Text; | ||
| attributedSymbol = context.SemanticModel.GetDeclaredSymbol(delegateDeclaration, context.CancellationToken); | ||
| break; | ||
| } | ||
|
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||
| if (attributedSymbol is not null && attributedSymbol.DeclaredAccessibility is Accessibility.Public) | ||
| { | ||
| if (attributedSymbol.ContainingType is not null && attributedSymbol.ContainingType.DeclaredAccessibility is not Accessibility.Public) | ||
| return; | ||
|
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| context.ReportDiagnostic(attribute.CreateDiagnostic(Rule, identifierName)); | ||
| } | ||
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| return; | ||
|
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| // Local functions | ||
|
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| static IdentifierNameSyntax StripOffNamespace(NameSyntax name) | ||
| { | ||
| while (name is QualifiedNameSyntax qualifiedName) | ||
| name = qualifiedName.Right; | ||
|
|
||
| return (IdentifierNameSyntax)name; | ||
| } | ||
| } | ||
| } | ||
| } | ||
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This might crash for AliasQualifiedNameSyntax or GenericNameSyntax