[clang-tidy] make getLangOpts return a const ref

llvm-svn: 357468

diff --git a/clang-tools-extra/clang-tidy/ClangTidyCheck.h b/clang-tools-extra/clang-tidy/ClangTidyCheck.h
index bfb57e3..db1b270 100644 (file)
--- a/clang-tools-extra/clang-tidy/ClangTidyCheck.h
+++ b/clang-tools-extra/clang-tidy/ClangTidyCheck.h
@@ -188,7 +188,7 @@ protected:
   /// \brief Returns the main file name of the current translation unit.
   StringRef getCurrentMainFile() const { return Context->getCurrentFile(); }
   /// \brief Returns the language options from the context.
-  LangOptions getLangOpts() const { return Context->getLangOpts(); }
+  const LangOptions &getLangOpts() const { return Context->getLangOpts(); }
 };
 
 } // namespace tidy