--- a/clang-tools-extra/clang-tidy/readability/NamedParameterCheck.h	Wed Nov 09 17:47:54 2022 +0900
+++ b/clang-tools-extra/clang-tidy/readability/NamedParameterCheck.h	Fri Aug 18 09:04:13 2023 +0900
@@ -11,9 +11,7 @@
 
 #include "../ClangTidyCheck.h"
 
-namespace clang {
-namespace tidy {
-namespace readability {
+namespace clang::tidy::readability {
 
 /// Find functions with unnamed arguments.
 ///
@@ -32,13 +30,11 @@
       : ClangTidyCheck(Name, Context) {}
   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
-  llvm::Optional<TraversalKind> getCheckTraversalKind() const override {
+  std::optional<TraversalKind> getCheckTraversalKind() const override {
     return TK_IgnoreUnlessSpelledInSource;
   }
 };
 
-} // namespace readability
-} // namespace tidy
-} // namespace clang
+} // namespace clang::tidy::readability
 
 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_READABILITY_NAMEDPARAMETERCHECK_H