Enable for Objective-C/C++

Author: localspook

clang-tools-extra/clang-tidy/readability/UseConcisePreprocessorDirectivesCheck.cpp

@@ -30,9 +30,8 @@ class IfPreprocessorCallbacks final : public PPCallbacks {
 
   void Elif(SourceLocation Loc, SourceRange ConditionRange, ConditionValueKind,
             SourceLocation) override {
-    if (PP.getLangOpts().C23 || PP.getLangOpts().CPlusPlus23) {
+    if (PP.getLangOpts().C23 || PP.getLangOpts().CPlusPlus23)
       impl(Loc, ConditionRange, {"elifdef", "elifndef"});
-    }
   }
 
 private:

clang-tools-extra/clang-tidy/readability/UseConcisePreprocessorDirectivesCheck.h

@@ -25,7 +25,7 @@ class UseConcisePreprocessorDirectivesCheck : public ClangTidyCheck {
   void registerPPCallbacks(const SourceManager &SM, Preprocessor *PP,
                            Preprocessor *ModuleExpanderPP) override;
   bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
-    return LangOpts.CPlusPlus || LangOpts.C99;
+    return true;
   }
 };
 

clang-tools-extra/test/clang-tidy/checkers/readability/use-concise-preprocessor-directives.cpp

@@ -1,7 +1,7 @@
 // RUN: %check_clang_tidy -std=c++98,c++11,c++14,c++17,c++20 -check-suffixes=,CXX %s readability-use-concise-preprocessor-directives %t
 // RUN: %check_clang_tidy -std=c++23-or-later -check-suffixes=,23,CXX,CXX23 %s readability-use-concise-preprocessor-directives %t
 
-// RUN: %check_clang_tidy -std=c99,c17,c11 %s readability-use-concise-preprocessor-directives %t -- -- -x c
+// RUN: %check_clang_tidy -std=c99,c11,c17 %s readability-use-concise-preprocessor-directives %t -- -- -x c
 // RUN: %check_clang_tidy -std=c23-or-later -check-suffixes=,23 %s readability-use-concise-preprocessor-directives %t -- -- -x c
 
 // CHECK-MESSAGES: :[[@LINE+2]]:2: warning: preprocessor condition can be written more concisely using '#ifdef' [readability-use-concise-preprocessor-directives]