[PATCH] D97361: [clang-tidy] Add misc-redundant-using check

[Yang Fan via Phabricator via cfe-commits]

nullptr.cpp created this revision.
nullptr.cpp added reviewers: alexfh, aaron.ballman, njames93, balazske.
Herald added subscribers: xazax.hun, mgorny.
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Finds redundant `using` declarations and directives.

Example:

  namespace n {
  void func();
  }
  
  namespace  {
  using n::func; // redundant using declaration, already in namespace 'n'.
  }



  namespace n {
  using namespace n; // redundant using directive, already in namespace 'n'.
  }


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D97361

Files:
  clang-tools-extra/clang-tidy/misc/CMakeLists.txt
  clang-tools-extra/clang-tidy/misc/MiscTidyModule.cpp
  clang-tools-extra/clang-tidy/misc/RedundantUsingCheck.cpp
  clang-tools-extra/clang-tidy/misc/RedundantUsingCheck.h
  clang-tools-extra/docs/ReleaseNotes.rst
  clang-tools-extra/docs/clang-tidy/checks/list.rst
  clang-tools-extra/docs/clang-tidy/checks/misc-redundant-using.rst
  clang-tools-extra/test/clang-tidy/checkers/misc-redundant-using.cpp

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