[PATCH] D147889: [clang-tidy] Improve bugprone-branch-clone with support for fallthrough attribute

[Piotr Zegar via Phabricator via cfe-commits]

PiotrZSL created this revision.
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Ignore duplicated switch cases with [[fallthrough]] attribute to reduce false positives.

Fixes: #47588


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D147889

Files:
  clang-tools-extra/clang-tidy/bugprone/BranchCloneCheck.cpp
  clang-tools-extra/docs/ReleaseNotes.rst
  clang-tools-extra/docs/clang-tidy/checks/bugprone/branch-clone.rst
  clang-tools-extra/test/clang-tidy/checkers/bugprone/branch-clone-fallthrough.cpp

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