Add MA0200 for empty property patterns on non-nullable value types#1160
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Report redundant empty property patterns on non-nullable value types and skip Nullable<T>. Adds rule documentation, tests, and generated configuration/documentation updates. Co-authored-by: Copilot <[email protected]>
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Updated [Meziantou.Analyzer](https://github.com/meziantou/Meziantou.Analyzer) from 3.0.84 to 3.0.85. <details> <summary>Release notes</summary> _Sourced from [Meziantou.Analyzer's releases](https://github.com/meziantou/Meziantou.Analyzer/releases)._ ## 3.0.85 NuGet package: <https://www.nuget.org/packages/Meziantou.Analyzer/3.0.85> ## What's Changed * Add MA0200 for empty property patterns on non-nullable value types by @meziantou in meziantou/Meziantou.Analyzer#1160 **Full Changelog**: meziantou/Meziantou.Analyzer@3.0.84...3.0.85 Commits viewable in [compare view](meziantou/Meziantou.Analyzer@3.0.84...3.0.85). </details> [](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores) Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`. [//]: # (dependabot-automerge-start) [//]: # (dependabot-automerge-end) --- <details> <summary>Dependabot commands and options</summary> <br /> You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot show <dependency name> ignore conditions` will show all of the ignore conditions of the specified dependency - `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself) </details> Signed-off-by: dependabot[bot] <[email protected]> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
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Why
Empty property patterns are null checks. When used on non-nullable value types (
value is { }), the condition is redundant and can hide intent. This rule adds a targeted diagnostic while preserving valid nullable scenarios.What changed
MA0200(DoNotUseEmptyPropertyPatternOnNonNullableValueType).IIsPatternOperationand detects empty recursive property patterns ({ }, including negated form handling).Nullable<T>.where T : struct) -> diagnosticNullable<T>, reference types, and unconstrained generics -> no diagnosticdocs/Rules/MA0200.md) and regenerated rule listings/config docs (README.md,docs/README.md, analyzer pack editorconfig files).docs/comparison-with-other-analyzers.md.Notes