enabled and mitigated `modernize-use-equals-default` clang-tidy warnings / removed unnecessary default destructors (#5335)

.clang-tidy

@@ -45,7 +45,6 @@ Checks: >
         -modernize-replace-auto-ptr,
         -modernize-return-braced-init-list,
         -modernize-use-auto,
-        -modernize-use-equals-default,
         -modernize-use-trailing-return-type,
         -performance-avoid-endl,
         -performance-inefficient-string-concatenation,

clang-tidy.md

@@ -63,7 +63,6 @@ This does not appear to be useful as it is reported on very common code.
 
 It was decided not to apply these.
 
-`modernize-use-equals-default`<br/>
 `modernize-loop-convert`<br/>
 
 These might change the behavior of code which might not be intended (need to file an upstream issue)

cli/executor.cpp

@@ -31,9 +31,6 @@ Executor::Executor(const std::map<std::string, std::size_t> &files, const Settin
     : mFiles(files), mSettings(settings), mSuppressions(suppressions), mErrorLogger(errorLogger)
 {}
 
-Executor::~Executor()
-{}
-
 bool Executor::hasToLog(const ErrorMessage &msg)
 {
     if (!mSuppressions.isSuppressed(msg))

cli/executor.h

@@ -40,7 +40,7 @@ class Suppressions;
 class Executor {
 public:
     Executor(const std::map<std::string, std::size_t> &files, const Settings &settings, Suppressions &suppressions, ErrorLogger &errorLogger);
-    virtual ~Executor();
+    virtual ~Executor() = default;
 
     Executor(const Executor &) = delete;
     void operator=(const Executor &) = delete;

cli/processexecutor.cpp

@@ -67,9 +67,6 @@ ProcessExecutor::ProcessExecutor(const std::map<std::string, std::size_t> &files
     assert(mSettings.jobs > 1);
 }
 
-ProcessExecutor::~ProcessExecutor()
-{}
-
 class PipeWriter : public ErrorLogger {
 public:
     enum PipeSignal {REPORT_OUT='1',REPORT_ERROR='2', CHILD_END='5'};

cli/processexecutor.h

@@ -40,7 +40,6 @@ class ProcessExecutor : public Executor {
 public:
     ProcessExecutor(const std::map<std::string, std::size_t> &files, const Settings &settings, Suppressions &suppressions, ErrorLogger &errorLogger);
     ProcessExecutor(const ProcessExecutor &) = delete;
-    ~ProcessExecutor() override;
     void operator=(const ProcessExecutor &) = delete;
 
     unsigned int check() override;

cli/singleexecutor.cpp

@@ -37,9 +37,6 @@ SingleExecutor::SingleExecutor(CppCheck &cppcheck, const std::map<std::string, s
     assert(mSettings.jobs == 1);
 }
 
-SingleExecutor::~SingleExecutor()
-{}
-
 // TODO: markup handling is not performed with multiple jobs
 unsigned int SingleExecutor::check()
 {

cli/singleexecutor.h

@@ -35,7 +35,6 @@ class SingleExecutor : public Executor
 public:
     SingleExecutor(CppCheck &cppcheck, const std::map<std::string, std::size_t> &files, const Settings &settings, Suppressions &suppressions, ErrorLogger &errorLogger);
     SingleExecutor(const SingleExecutor &) = delete;
-    ~SingleExecutor() override;
     void operator=(const SingleExecutor &) = delete;
 
     unsigned int check() override;

cli/threadexecutor.cpp

@@ -46,9 +46,6 @@ ThreadExecutor::ThreadExecutor(const std::map<std::string, std::size_t> &files,
     assert(mSettings.jobs > 1);
 }
 
-ThreadExecutor::~ThreadExecutor()
-{}
-
 class SyncLogForwarder : public ErrorLogger
 {
 public:

cli/threadexecutor.h

@@ -40,7 +40,6 @@ class ThreadExecutor : public Executor {
 public:
     ThreadExecutor(const std::map<std::string, std::size_t> &files, const Settings &settings, Suppressions &suppressions, ErrorLogger &errorLogger);
     ThreadExecutor(const ThreadExecutor &) = delete;
-    ~ThreadExecutor() override;
     void operator=(const ThreadExecutor &) = delete;
 
     unsigned int check() override;

gui/application.h

@@ -42,7 +42,7 @@
  */
 class Application {
 public:
-    Application() {}
+    Application() = default;
     Application(QString name, QString path, QString params);
 
     /**

gui/checkthread.cpp

@@ -86,14 +86,7 @@ static bool executeCommand(std::string exe, std::vector<std::string> args, std::
 CheckThread::CheckThread(ThreadResult &result) :
     mResult(result),
     mCppcheck(result, true, executeCommand)
-{
+{}
-    //ctor
-}
-
-CheckThread::~CheckThread()
-{
-    //dtor
-}
 
 void CheckThread::check(const Settings &settings)
 {

gui/checkthread.h

@@ -46,7 +46,6 @@ class CheckThread : public QThread {
     Q_OBJECT
 public:
     explicit CheckThread(ThreadResult &result);
-    ~CheckThread() override;
 
     /**
      * @brief Set settings for cppcheck

gui/codeeditstylecontrols.h

@@ -35,7 +35,6 @@ class SelectColorButton : public QPushButton {
     Q_OBJECT
 public:
     explicit SelectColorButton(QWidget* parent);
-    ~SelectColorButton() override {}
 
     void setColor(const QColor& color);
     const QColor& getColor();
@@ -57,7 +56,6 @@ class SelectFontWeightCombo : public QComboBox {
     Q_OBJECT
 public:
     explicit SelectFontWeightCombo(QWidget* parent);
-    ~SelectFontWeightCombo() override {}
 
     void setWeight(const QFont::Weight& weight);
     const QFont::Weight& getWeight();

gui/codeeditstyledialog.h

@@ -42,7 +42,6 @@ class StyleEditDialog : public QDialog {
 public:
     explicit StyleEditDialog(const CodeEditorStyle& newStyle,
                              QWidget *parent = nullptr);
-    ~StyleEditDialog() override {}
 
     CodeEditorStyle getStyle();
 

gui/cppchecklibrarydata.cpp

@@ -35,9 +35,6 @@
 const unsigned int CppcheckLibraryData::Function::Arg::ANY = ~0U;
 const unsigned int CppcheckLibraryData::Function::Arg::VARIADIC = ~1U;
 
-CppcheckLibraryData::CppcheckLibraryData()
-{}
-
 static std::string unhandledElement(const QXmlStreamReader &xmlReader)
 {
     throw std::runtime_error(QObject::tr("line %1: Unhandled element %2").arg(xmlReader.lineNumber()).arg(xmlReader.name().toString()).toStdString());

gui/cppchecklibrarydata.h

@@ -30,7 +30,7 @@ class QIODevice;
 
 class CppcheckLibraryData {
 public:
-    CppcheckLibraryData();
+    CppcheckLibraryData() = default;
 
     struct Container {
         QString id;

gui/csvreport.cpp

@@ -30,9 +30,6 @@ CsvReport::CsvReport(const QString &filename) :
     Report(filename)
 {}
 
-CsvReport::~CsvReport()
-{}
-
 bool CsvReport::create()
 {
     if (Report::create()) {

gui/csvreport.h

@@ -39,7 +39,6 @@ class ErrorItem;
 class CsvReport : public Report {
 public:
     explicit CsvReport(const QString &filename);
-    ~CsvReport() override;
 
     /**
      * @brief Create the report (file).

gui/printablereport.cpp

@@ -27,9 +27,6 @@ PrintableReport::PrintableReport() :
     Report(QString())
 {}
 
-PrintableReport::~PrintableReport()
-{}
-
 bool PrintableReport::create()
 {
     return true;

gui/printablereport.h

@@ -36,7 +36,6 @@ class ErrorItem;
 class PrintableReport : public Report {
 public:
     PrintableReport();
-    ~PrintableReport() override;
 
     /**
      * @brief Create the report (file).

gui/resultstree.cpp

@@ -91,9 +91,6 @@ ResultsTree::ResultsTree(QWidget * parent) :
     connect(this, &ResultsTree::doubleClicked, this, &ResultsTree::quickStartApplication);
 }
 
-ResultsTree::~ResultsTree()
-{}
-
 void ResultsTree::keyPressEvent(QKeyEvent *event)
 {
     if (event->key() == Qt::Key_Enter || event->key() == Qt::Key_Return) {

gui/resultstree.h

@@ -53,7 +53,7 @@ class ResultsTree : public QTreeView {
     Q_OBJECT
 public:
     explicit ResultsTree(QWidget * parent = nullptr);
-    ~ResultsTree() override;
+
     void initialize(QSettings *settings, ApplicationList *list, ThreadHandler *checkThreadHandler);
 
     /**

gui/test/projectfile/testprojectfile.cpp

@@ -40,8 +40,8 @@ const char Settings::SafeChecks::XmlExternalFunctions[] = "external-functions";
 const char Settings::SafeChecks::XmlInternalFunctions[] = "internal-functions";
 const char Settings::SafeChecks::XmlExternalVariables[] = "external-variables";
 Settings::Settings() : maxCtuDepth(10) {}
-cppcheck::Platform::Platform() {}
+cppcheck::Platform::Platform() = default;
-ImportProject::ImportProject() {}
+ImportProject::ImportProject() = default;
 bool ImportProject::sourceFileExists(const std::string & /*file*/) {
     return true;
 }

gui/threadresult.cpp

@@ -28,11 +28,6 @@
 #include <QFile>
 #include <QMutexLocker>
 
-ThreadResult::~ThreadResult()
-{
-    //dtor
-}
-
 void ThreadResult::reportOut(const std::string &outmsg, Color /*c*/)
 {
     emit log(QString::fromStdString(outmsg));

gui/threadresult.h

@@ -46,7 +46,6 @@ class ThreadResult : public QObject, public ErrorLogger {
     Q_OBJECT
 public:
     ThreadResult() = default;
-    ~ThreadResult() override;
 
     /**
      * @brief Get next unprocessed file

gui/translationhandler.cpp

@@ -62,9 +62,6 @@ TranslationHandler::TranslationHandler(QObject *parent) :
     addTranslation("Swedish", "cppcheck_sv");
 }
 
-TranslationHandler::~TranslationHandler()
-{}
-
 bool TranslationHandler::setLanguage(const QString &code)
 {
     bool failure = false;

gui/translationhandler.h

@@ -63,7 +63,6 @@ class TranslationHandler : QObject {
     Q_OBJECT
 public:
     explicit TranslationHandler(QObject *parent = nullptr);
-    ~TranslationHandler() override;
 
     /**
      * @brief Get a list of available translations.

gui/txtreport.cpp

@@ -29,9 +29,6 @@ TxtReport::TxtReport(const QString &filename) :
     Report(filename)
 {}
 
-TxtReport::~TxtReport()
-{}
-
 bool TxtReport::create()
 {
     if (Report::create()) {

gui/txtreport.h

@@ -40,7 +40,6 @@ class TxtReport : public Report {
 
 public:
     explicit TxtReport(const QString &filename);
-    ~TxtReport() override;
 
     /**
      * @brief Create the report (file).

lib/analyzer.h

@@ -184,7 +184,7 @@ struct Analyzer {
     virtual bool invalid() const {
         return false;
     }
-    virtual ~Analyzer() {}
+    virtual ~Analyzer() = default;
     Analyzer(const Analyzer&) = default;
 protected:
     Analyzer() = default;

lib/check.h

@@ -100,8 +100,8 @@ public:
     /** Base class used for whole-program analysis */
     class CPPCHECKLIB FileInfo {
     public:
-        FileInfo() {}
+        FileInfo() = default;
-        virtual ~FileInfo() {}
+        virtual ~FileInfo() = default;
         virtual std::string toString() const {
             return std::string();
         }

lib/ctu.h

@@ -82,7 +82,7 @@ namespace CTU {
                 : callId(std::move(callId)), callArgNr(callArgNr), callFunctionName(std::move(callFunctionName)), location(std::move(loc))
             {}
             CallBase(const Tokenizer *tokenizer, const Token *callToken);
-            virtual ~CallBase() {}
+            virtual ~CallBase() = default;
             CallBase(const CallBase&) = default;
             std::string callId;
             int callArgNr{};

lib/errorlogger.h

@@ -219,8 +219,8 @@ private:
  */
 class CPPCHECKLIB ErrorLogger {
 public:
-    ErrorLogger() {}
+    ErrorLogger() = default;
-    virtual ~ErrorLogger() {}
+    virtual ~ErrorLogger() = default;
 
     /**
      * Information about progress is directed here.

lib/infer.h

@@ -33,7 +33,7 @@ template<class T> class ValuePtr;
 struct InferModel {
     virtual bool match(const ValueFlow::Value& value) const = 0;
     virtual ValueFlow::Value yield(MathLib::bigint value) const = 0;
-    virtual ~InferModel() {}
+    virtual ~InferModel() = default;
     InferModel(const InferModel&) = default;
 protected:
     InferModel() = default;

lib/templatesimplifier.cpp

@@ -284,9 +284,6 @@ TemplateSimplifier::TemplateSimplifier(Tokenizer &tokenizer)
     mErrorLogger(mTokenizer.mErrorLogger)
 {}
 
-TemplateSimplifier::~TemplateSimplifier()
-{}
-
 void TemplateSimplifier::checkComplicatedSyntaxErrorsInTemplates()
 {
     // check for more complicated syntax errors when using templates..

lib/templatesimplifier.h

@@ -48,7 +48,6 @@ class CPPCHECKLIB TemplateSimplifier {
 
 public:
     explicit TemplateSimplifier(Tokenizer &tokenizer);
-    ~TemplateSimplifier();
 
     std::string dump() const {
         return mDump;

lib/timer.h

@@ -37,7 +37,7 @@ enum class SHOWTIME_MODES {
 
 class CPPCHECKLIB TimerResultsIntf {
 public:
-    virtual ~TimerResultsIntf() {}
+    virtual ~TimerResultsIntf() = default;
 
     virtual void addResults(const std::string& str, std::clock_t clocks) = 0;
 };
@@ -54,7 +54,7 @@ struct TimerResultsData {
 
 class CPPCHECKLIB TimerResults : public TimerResultsIntf {
 public:
-    TimerResults() {}
+    TimerResults() = default;
 
     void showResults(SHOWTIME_MODES mode) const;
     void addResults(const std::string& str, std::clock_t clocks) override;

lib/valueflow.cpp

@@ -6676,7 +6676,7 @@ struct ConditionHandler {
             }
         });
     }
-    virtual ~ConditionHandler() {}
+    virtual ~ConditionHandler() = default;
     ConditionHandler(const ConditionHandler&) = default;
 protected:
     ConditionHandler() = default;
@@ -9291,7 +9291,7 @@ struct ValueFlowPass {
     virtual void run(const ValueFlowState& state) const = 0;
     // Returns true if pass needs C++
     virtual bool cpp() const = 0;
-    virtual ~ValueFlowPass() noexcept {}
+    virtual ~ValueFlowPass() noexcept = default;
 };
 
 struct ValueFlowPassRunner {

lib/valueptr.h

@@ -97,7 +97,6 @@ public:
     operator bool() const NOEXCEPT {
         return !!mPtr;
     }
-    ~ValuePtr() {}
 
 private:
     std::shared_ptr<T> mPtr;

test/fixture.h

@@ -241,7 +241,6 @@ public:
     const std::string classname;
 
     explicit TestFixture(const char * const _name);
-    ~TestFixture() override {}
 
     static std::size_t runTests(const options& args);
 };