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Support GeneratedRegex diagnostics on partial properties#1173

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meziantou merged 2 commits into
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meziantou/generatedregex-properties
May 28, 2026
Merged

Support GeneratedRegex diagnostics on partial properties#1173
meziantou merged 2 commits into
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meziantou/generatedregex-properties

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GeneratedRegex-specific diagnostics (MA0009 and MA0023) previously only analyzed methods. With C# 13 partial properties, [GeneratedRegex] can be applied to properties too, so those cases were silently missed.

What changed

  • Updated GeneratedRegexAttributeUsageAnalyzer to analyze both SymbolKind.Method and SymbolKind.Property.
  • Refactored shared logic in RegexUsageAnalyzerBase to handle GeneratedRegex analysis for both symbols while preserving method-specific checks.
  • Added a declaration filter so diagnostics are only reported from the declaration that contains the attribute syntax, avoiding duplicate reports on partial members.
  • Extended tests in UseRegexTimeoutAnalyzerTests and UseRegexOptionsAnalyzerTests with GeneratedRegex property scenarios, including code-fix coverage.
  • Updated MA0009 and MA0023 documentation examples to include GeneratedRegex property usage.

Validation

  • Ran targeted analyzer tests for regex timeout/options on default, roslyn4.2, and roslyn4.14.
  • Ran dotnet build.
  • Ran dotnet run --project src/DocumentationGenerator and kept generated markdown changes in sync.

meziantou and others added 2 commits May 27, 2026 21:01
Analyze [GeneratedRegex] attributes on partial properties in MA0009/MA0023, add property coverage tests, and update rule docs examples.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@meziantou meziantou merged commit a096ce8 into main May 28, 2026
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@meziantou meziantou deleted the meziantou/generatedregex-properties branch May 28, 2026 01:36
This was referenced May 28, 2026
IhateTrains pushed a commit to ParadoxGameConverters/ImperatorToCK3 that referenced this pull request May 28, 2026
Updated
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<details>
<summary>Release notes</summary>

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## 3.0.97

NuGet package:
<https://www.nuget.org/packages/Meziantou.Analyzer/3.0.97>

## What's Changed
* Support GeneratedRegex diagnostics on partial properties by
@​meziantou in meziantou/Meziantou.Analyzer#1173


**Full Changelog**:
meziantou/Meziantou.Analyzer@3.0.96...3.0.97

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This was referenced May 28, 2026
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