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Potential false negative in CA1047 #5025

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Youssef1313 opened this issue Apr 16, 2021 · 1 comment · Fixed by #5093
Closed

Potential false negative in CA1047 #5025

Youssef1313 opened this issue Apr 16, 2021 · 1 comment · Fixed by #5093
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Bug The product is not behaving according to its current intended design False_Negative No diagnostic is reported for a problematic case help wanted The issue is up-for-grabs, and can be claimed by commenting

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@Youssef1313
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Analyzer

Diagnostic ID: CA1047: CA1047: Do not declare protected members in sealed types

Describe the bug

roslyn-analyzers/src/NetAnalyzers/Core/Microsoft.CodeQuality.Analyzers/ApiDesignGuidelines/DoNotDeclareProtectedMembersInSealedTypes.cs

Line 52 in a0522af

if (!symbol.IsProtected() ||

roslyn-analyzers/src/Utilities/Compiler/Extensions/ISymbolExtensions.cs

Lines 78 to 81 in a0522af

public static bool IsProtected(this ISymbol symbol)
{
return symbol.DeclaredAccessibility == Accessibility.Protected;
}

This doesn't check for protected internal.

Also the following check feels redundant since this rule is specific to protected members only?

roslyn-analyzers/src/NetAnalyzers/Core/Microsoft.CodeQuality.Analyzers/ApiDesignGuidelines/DoNotDeclareProtectedMembersInSealedTypes.cs

Lines 46 to 50 in a0522af

// FxCop compat: only analyze externally visible symbols by default.
if (!context.Options.MatchesConfiguredVisibility(Rule, symbol, context.Compilation, context.CancellationToken))
{
return;
}

@mavasani mavasani added Area-Microsoft.CodeQuality.Analyzers Bug The product is not behaving according to its current intended design False_Negative No diagnostic is reported for a problematic case help wanted The issue is up-for-grabs, and can be claimed by commenting labels Apr 22, 2021
@mavasani
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We need to handle both the case below:

  1. private protected
  2. protected internal

@NewellClark NewellClark mentioned this issue May 10, 2021
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NewellClark added a commit to NewellClark/roslyn-analyzers that referenced this issue May 17, 2021
@NewellClark
Fix dotnet#5025
a4a206a 
- Add unit tests for C#
- Add unit tests for 'protected internal' and 'private protected'
- Fix analyzer to also flag 'protected internal' and 'private protected' members
mavasani added a commit that referenced this issue May 18, 2021
@mavasani
Merge pull request #5093 from NewellClark/#5025-false-negative-CA1047
1fa83fe 
Fix #5025
@jmarolf jmarolf mentioned this issue Jan 31, 2022
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Bug The product is not behaving according to its current intended design False_Negative No diagnostic is reported for a problematic case help wanted The issue is up-for-grabs, and can be claimed by commenting
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@mavasani @Youssef1313