Another round of replacing 0 with nullptr

This time based on grepping to also include documentation, tests and
examples previously missed by the automatic tool.

Change-Id: Ied1703f4bcc470fbc275f759ed5b7c588a5c4e9f
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

26 files changed, 39 insertions, 39 deletions

diff --git a/src/corelib/doc/snippets/code/doc_src_properties.cpp b/src/corelib/doc/snippets/code/doc_src_properties.cpp
index 47dff630f8..5a5627abfd 100644
--- a/src/corelib/doc/snippets/code/doc_src_properties.cpp
+++ b/src/corelib/doc/snippets/code/doc_src_properties.cpp
@@ -106,7 +106,7 @@ class MyClass : public QObject
     Q_PROPERTY(Priority priority READ priority WRITE setPriority NOTIFY priorityChanged)
 
 public:
-    MyClass(QObject *parent = 0);
+    MyClass(QObject *parent = nullptr);
     ~MyClass();
 
     enum Priority { High, Low, VeryHigh, VeryLow };
diff --git a/src/corelib/doc/snippets/eventfilters/filterobject.h b/src/corelib/doc/snippets/eventfilters/filterobject.h
index 354aa4ff5c..d249743a15 100644
--- a/src/corelib/doc/snippets/eventfilters/filterobject.h
+++ b/src/corelib/doc/snippets/eventfilters/filterobject.h
@@ -58,7 +58,7 @@ class FilterObject : public QObject
     Q_OBJECT
 
 public:
-    FilterObject(QObject *parent = 0);
+    FilterObject(QObject *parent = nullptr);
     bool eventFilter(QObject *object, QEvent *event) override;
     void setFilteredObject(QObject *object);
 
diff --git a/src/corelib/doc/snippets/qsortfilterproxymodel-details/main.cpp b/src/corelib/doc/snippets/qsortfilterproxymodel-details/main.cpp
index 2a7b310716..a79f07c3ae 100644
--- a/src/corelib/doc/snippets/qsortfilterproxymodel-details/main.cpp
+++ b/src/corelib/doc/snippets/qsortfilterproxymodel-details/main.cpp
@@ -55,7 +55,7 @@
 class MyItemModel : public QStandardItemModel
 {
 public:
-    MyItemModel(QWidget *parent = 0);
+    MyItemModel(QWidget *parent = nullptr);
 };
 
 MyItemModel::MyItemModel(QWidget *parent)
@@ -65,7 +65,7 @@ MyItemModel::MyItemModel(QWidget *parent)
 class Widget : public QWidget
 {
 public:
-    Widget(QWidget *parent = 0);
+    Widget(QWidget *parent = nullptr);
 };
 
 Widget::Widget(QWidget *parent)
diff --git a/src/corelib/doc/snippets/qstring/main.cpp b/src/corelib/doc/snippets/qstring/main.cpp
index cb557ac023..419b98366d 100644
--- a/src/corelib/doc/snippets/qstring/main.cpp
+++ b/src/corelib/doc/snippets/qstring/main.cpp
@@ -55,7 +55,7 @@
 class Widget : public QWidget
 {
 public:
-    Widget(QWidget *parent = 0);
+    Widget(QWidget *parent = nullptr);
 
     void constCharPointer();
     void constCharArray();
diff --git a/src/corelib/doc/snippets/qstringlist/main.cpp b/src/corelib/doc/snippets/qstringlist/main.cpp
index 5284a5fb78..fceadc4e99 100644
--- a/src/corelib/doc/snippets/qstringlist/main.cpp
+++ b/src/corelib/doc/snippets/qstringlist/main.cpp
@@ -55,7 +55,7 @@ using namespace std;
 class Widget : public QWidget
 {
 public:
-    Widget(QWidget *parent = 0);
+    Widget(QWidget *parent = nullptr);
 };
 
 Widget::Widget(QWidget *parent)
diff --git a/src/corelib/doc/snippets/qstringlistmodel/main.cpp b/src/corelib/doc/snippets/qstringlistmodel/main.cpp
index 4c9519d2b2..fa7f414526 100644
--- a/src/corelib/doc/snippets/qstringlistmodel/main.cpp
+++ b/src/corelib/doc/snippets/qstringlistmodel/main.cpp
@@ -53,7 +53,7 @@
 class Widget : public QWidget
 {
 public:
-    Widget(QWidget *parent = 0);
+    Widget(QWidget *parent = nullptr);
 };
 
 Widget::Widget(QWidget *parent)
diff --git a/src/corelib/global/qglobal.h b/src/corelib/global/qglobal.h
index 25c31e4067..deb3dfe454 100644
--- a/src/corelib/global/qglobal.h
+++ b/src/corelib/global/qglobal.h
@@ -1184,7 +1184,7 @@ Q_CORE_EXPORT QString qtTrId(const char *id, int n = -1);
 #  define dynamic_cast QT_PREPEND_NAMESPACE(qt_dynamic_cast_check)
 
   template<typename T, typename X>
-  T qt_dynamic_cast_check(X, T* = 0)
+  T qt_dynamic_cast_check(X, T* = nullptr)
   { return T::dynamic_cast_will_always_fail_because_rtti_is_disabled; }
 #endif
 
diff --git a/src/corelib/io/qfilesystemengine_win.cpp b/src/corelib/io/qfilesystemengine_win.cpp
index b3d7ecfed8..d876fdf4ae 100644
--- a/src/corelib/io/qfilesystemengine_win.cpp
+++ b/src/corelib/io/qfilesystemengine_win.cpp
@@ -567,7 +567,7 @@ QString QFileSystemEngine::nativeAbsoluteFilePath(const QString &path)
     // can be //server or //server/share
     QString absPath;
     QVarLengthArray<wchar_t, MAX_PATH> buf(qMax(MAX_PATH, path.size() + 1));
-    wchar_t *fileName = 0;
+    wchar_t *fileName = nullptr;
     DWORD retLen = GetFullPathName((wchar_t*)path.utf16(), buf.size(), buf.data(), &fileName);
     if (retLen > (DWORD)buf.size()) {
         buf.resize(retLen);
diff --git a/src/corelib/io/qfilesystemwatcher_win.cpp b/src/corelib/io/qfilesystemwatcher_win.cpp
index b131524614..29dd78030b 100644
--- a/src/corelib/io/qfilesystemwatcher_win.cpp
+++ b/src/corelib/io/qfilesystemwatcher_win.cpp
@@ -406,7 +406,7 @@ QStringList QWindowsFileSystemWatcherEngine::addPaths(const QStringList &paths,
         pathInfo = fileInfo;
 
         // Look for a thread
-        QWindowsFileSystemWatcherEngineThread *thread = 0;
+        QWindowsFileSystemWatcherEngineThread *thread = nullptr;
         QWindowsFileSystemWatcherEngine::Handle handle;
         QList<QWindowsFileSystemWatcherEngineThread *>::const_iterator jt, end;
         end = threads.constEnd();
diff --git a/src/corelib/io/qstandardpaths_android.cpp b/src/corelib/io/qstandardpaths_android.cpp
index 1f4e0de1e7..f4a2a8f121 100644
--- a/src/corelib/io/qstandardpaths_android.cpp
+++ b/src/corelib/io/qstandardpaths_android.cpp
@@ -134,7 +134,7 @@ static QString getExternalStoragePublicDirectory(const char *directoryField)
  * Locations where applications can place persistent files it owns.
  * E.g., /storage/org.app/Music
  */
-static QString getExternalFilesDir(const char *directoryField = 0)
+static QString getExternalFilesDir(const char *directoryField = nullptr)
 {
     QString &path = (*androidDirCache)[QLatin1String("APPNAME_%1").arg(QLatin1String(directoryField))];
     if (!path.isEmpty())
diff --git a/src/corelib/io/qwindowspipereader_p.h b/src/corelib/io/qwindowspipereader_p.h
index 5ec9dc379c..2842343597 100644
--- a/src/corelib/io/qwindowspipereader_p.h
+++ b/src/corelib/io/qwindowspipereader_p.h
@@ -62,7 +62,7 @@ class Q_CORE_EXPORT QWindowsPipeReader : public QObject
 {
     Q_OBJECT
 public:
-    explicit QWindowsPipeReader(QObject *parent = 0);
+    explicit QWindowsPipeReader(QObject *parent = nullptr);
     ~QWindowsPipeReader();
 
     void setHandle(HANDLE hPipeReadEnd);
diff --git a/src/corelib/io/qwindowspipewriter_p.h b/src/corelib/io/qwindowspipewriter_p.h
index f7f68b688c..39e8ffe40a 100644
--- a/src/corelib/io/qwindowspipewriter_p.h
+++ b/src/corelib/io/qwindowspipewriter_p.h
@@ -111,7 +111,7 @@ class Q_CORE_EXPORT QWindowsPipeWriter : public QObject
 {
     Q_OBJECT
 public:
-    explicit QWindowsPipeWriter(HANDLE pipeWriteEnd, QObject *parent = 0);
+    explicit QWindowsPipeWriter(HANDLE pipeWriteEnd, QObject *parent = nullptr);
     ~QWindowsPipeWriter();
 
     bool write(const QByteArray &ba);
diff --git a/src/corelib/kernel/qeventdispatcher_cf_p.h b/src/corelib/kernel/qeventdispatcher_cf_p.h
index eb84b0a64c..2d76bf53da 100644
--- a/src/corelib/kernel/qeventdispatcher_cf_p.h
+++ b/src/corelib/kernel/qeventdispatcher_cf_p.h
@@ -209,7 +209,7 @@ class Q_CORE_EXPORT QEventDispatcherCoreFoundation : public QAbstractEventDispat
     Q_OBJECT
 
 public:
-    explicit QEventDispatcherCoreFoundation(QObject *parent = 0);
+    explicit QEventDispatcherCoreFoundation(QObject *parent = nullptr);
     void startingUp() override;
     ~QEventDispatcherCoreFoundation();
 
diff --git a/src/corelib/kernel/qeventdispatcher_win.cpp b/src/corelib/kernel/qeventdispatcher_win.cpp
index 03d003bb0f..44487d57e2 100644
--- a/src/corelib/kernel/qeventdispatcher_win.cpp
+++ b/src/corelib/kernel/qeventdispatcher_win.cpp
@@ -162,8 +162,8 @@ LRESULT QT_WIN_CALLBACK qt_internal_proc(HWND hwnd, UINT message, WPARAM wp, LPA
 #else
     auto q = reinterpret_cast<QEventDispatcherWin32 *>(GetWindowLong(hwnd, GWL_USERDATA));
 #endif
-    QEventDispatcherWin32Private *d = 0;
-    if (q != 0)
+    QEventDispatcherWin32Private *d = nullptr;
+    if (q != nullptr)
         d = q->d_func();
 
     switch (message) {
@@ -187,7 +187,7 @@ LRESULT QT_WIN_CALLBACK qt_internal_proc(HWND hwnd, UINT message, WPARAM wp, LPA
             break;
         }
         if (type >= 0) {
-            Q_ASSERT(d != 0);
+            Q_ASSERT(d != nullptr);
             QSNDict *sn_vec[4] = { &d->sn_read, &d->sn_write, &d->sn_except, &d->sn_read };
             QSNDict *dict = sn_vec[type];
 
@@ -217,7 +217,7 @@ LRESULT QT_WIN_CALLBACK qt_internal_proc(HWND hwnd, UINT message, WPARAM wp, LPA
         return 0;
     }
     case WM_QT_ACTIVATENOTIFIERS: {
-        Q_ASSERT(d != 0);
+        Q_ASSERT(d != nullptr);
 
         // Postpone activation if we have unhandled socket notifier messages
         // in the queue. WM_QT_ACTIVATENOTIFIERS will be posted again as a result of
@@ -242,7 +242,7 @@ LRESULT QT_WIN_CALLBACK qt_internal_proc(HWND hwnd, UINT message, WPARAM wp, LPA
         return 0;
     }
     case WM_TIMER:
-        Q_ASSERT(d != 0);
+        Q_ASSERT(d != nullptr);
 
         if (wp == d->sendPostedEventsTimerId)
             q->sendPostedEvents();
@@ -250,7 +250,7 @@ LRESULT QT_WIN_CALLBACK qt_internal_proc(HWND hwnd, UINT message, WPARAM wp, LPA
             d->sendTimerEvent(wp);
         return 0;
     case WM_QT_SENDPOSTEDEVENTS:
-        Q_ASSERT(d != 0);
+        Q_ASSERT(d != nullptr);
 
         // We send posted events manually, if the window procedure was invoked
         // by the foreign event loop (e.g. from the native modal dialog).
@@ -268,7 +268,7 @@ LRESULT QT_WIN_CALLBACK qt_internal_proc(HWND hwnd, UINT message, WPARAM wp, LPA
 LRESULT QT_WIN_CALLBACK qt_GetMessageHook(int code, WPARAM wp, LPARAM lp)
 {
     QEventDispatcherWin32 *q = qobject_cast<QEventDispatcherWin32 *>(QAbstractEventDispatcher::instance());
-    Q_ASSERT(q != 0);
+    Q_ASSERT(q != nullptr);
     QEventDispatcherWin32Private *d = q->d_func();
     MSG *msg = reinterpret_cast<MSG *>(lp);
     // Windows unexpectedly passes PM_NOYIELD flag to the hook procedure,
diff --git a/src/corelib/kernel/qeventdispatcher_win_p.h b/src/corelib/kernel/qeventdispatcher_win_p.h
index 9ee4eb725d..a5c063e062 100644
--- a/src/corelib/kernel/qeventdispatcher_win_p.h
+++ b/src/corelib/kernel/qeventdispatcher_win_p.h
@@ -73,7 +73,7 @@ class Q_CORE_EXPORT QEventDispatcherWin32 : public QAbstractEventDispatcher
     Q_DECLARE_PRIVATE(QEventDispatcherWin32)
 
 public:
-    explicit QEventDispatcherWin32(QObject *parent = 0);
+    explicit QEventDispatcherWin32(QObject *parent = nullptr);
     ~QEventDispatcherWin32();
 
     bool QT_ENSURE_STACK_ALIGNED_FOR_SSE processEvents(QEventLoop::ProcessEventsFlags flags) override;
@@ -103,7 +103,7 @@ public:
     HWND internalHwnd();
 
 protected:
-    QEventDispatcherWin32(QEventDispatcherWin32Private &dd, QObject *parent = 0);
+    QEventDispatcherWin32(QEventDispatcherWin32Private &dd, QObject *parent = nullptr);
     virtual void sendPostedEvents();
     void doUnregisterSocketNotifier(QSocketNotifier *notifier);
     void doUnregisterEventNotifier(QWinEventNotifier *notifier);
diff --git a/src/corelib/kernel/qjni.cpp b/src/corelib/kernel/qjni.cpp
index 5f652d70e3..b593483e59 100644
--- a/src/corelib/kernel/qjni.cpp
+++ b/src/corelib/kernel/qjni.cpp
@@ -81,7 +81,7 @@ static QByteArray toBinaryEncClassName(const QByteArray &className)
     return QByteArray(className).replace('/', '.');
 }
 
-static jclass getCachedClass(const QByteArray &classBinEnc, bool *isCached = 0)
+static jclass getCachedClass(const QByteArray &classBinEnc, bool *isCached = nullptr)
 {
     QReadLocker locker(cachedClassesLock);
     const QHash<QString, jclass>::const_iterator &it = cachedClasses->constFind(QString::fromLatin1(classBinEnc));
diff --git a/src/corelib/kernel/qjni_p.h b/src/corelib/kernel/qjni_p.h
index ec8525e6e1..b5139d404b 100644
--- a/src/corelib/kernel/qjni_p.h
+++ b/src/corelib/kernel/qjni_p.h
@@ -72,7 +72,7 @@ public:
     ~QJNIEnvironmentPrivate();
     JNIEnv *operator->();
     operator JNIEnv*() const;
-    static jclass findClass(const char *className, JNIEnv *env = 0);
+    static jclass findClass(const char *className, JNIEnv *env = nullptr);
 
 private:
     friend class QAndroidJniEnvironment;
diff --git a/src/corelib/kernel/qmetatype.cpp b/src/corelib/kernel/qmetatype.cpp
index b3807b145d..60588e9329 100644
--- a/src/corelib/kernel/qmetatype.cpp
+++ b/src/corelib/kernel/qmetatype.cpp
@@ -579,7 +579,7 @@ const QMetaObject *QMetaType::metaObject() const
 }
 
 /*!
-    \fn void *QMetaType::create(const void *copy = 0) const
+    \fn void *QMetaType::create(const void *copy = nullptr) const
     \since 5.0
 
     Returns a copy of \a copy, assuming it is of the type that this
@@ -624,7 +624,7 @@ void QMetaType::destroy(void *data) const
 }
 
 /*!
-    \fn void *QMetaType::construct(void *where, const void *copy = 0) const
+    \fn void *QMetaType::construct(void *where, const void *copy = nullptr) const
     \since 5.0
 
     Constructs a value of the type that this QMetaType instance
diff --git a/src/corelib/kernel/qpoll.cpp b/src/corelib/kernel/qpoll.cpp
index 8b87bfe79d..f41c413db6 100644
--- a/src/corelib/kernel/qpoll.cpp
+++ b/src/corelib/kernel/qpoll.cpp
@@ -177,7 +177,7 @@ int qt_poll(struct pollfd *fds, nfds_t nfds, const struct timespec *timeout_ts)
     }
 
     fd_set read_fds, write_fds, except_fds;
-    struct timeval tv, *ptv = 0;
+    struct timeval tv, *ptv = nullptr;
 
     if (timeout_ts) {
         tv = timespecToTimeval(*timeout_ts);
diff --git a/src/corelib/kernel/qproperty.h b/src/corelib/kernel/qproperty.h
index 156696dace..ab93cdccc6 100644
--- a/src/corelib/kernel/qproperty.h
+++ b/src/corelib/kernel/qproperty.h
@@ -207,7 +207,7 @@ public:
 namespace Qt {
     template <typename Functor>
     auto makePropertyBinding(Functor &&f, const QPropertyBindingSourceLocation &location = QT_PROPERTY_DEFAULT_BINDING_LOCATION,
-                             std::enable_if_t<std::is_invocable_v<Functor>> * = 0)
+                             std::enable_if_t<std::is_invocable_v<Functor>> * = nullptr)
     {
         return QPropertyBinding<std::invoke_result_t<Functor>>(std::forward<Functor>(f), location);
     }
@@ -321,7 +321,7 @@ public:
 #ifndef Q_CLANG_QDOC
     template <typename Functor>
     explicit QProperty(Functor &&f, const QPropertyBindingSourceLocation &location = QT_PROPERTY_DEFAULT_BINDING_LOCATION,
-                       typename std::enable_if_t<std::is_invocable_r_v<T, Functor&>> * = 0)
+                       typename std::enable_if_t<std::is_invocable_r_v<T, Functor&>> * = nullptr)
         : QProperty(QPropertyBinding<T>(std::forward<Functor>(f), location))
     {}
 #else
@@ -821,7 +821,7 @@ public:
 #ifndef Q_CLANG_QDOC
     template <typename Functor>
     explicit QObjectBindableProperty(Functor &&f, const QPropertyBindingSourceLocation &location = QT_PROPERTY_DEFAULT_BINDING_LOCATION,
-                       typename std::enable_if_t<std::is_invocable_r_v<T, Functor&>> * = 0)
+                       typename std::enable_if_t<std::is_invocable_r_v<T, Functor&>> * = nullptr)
         : QObjectBindableProperty(QPropertyBinding<T>(std::forward<Functor>(f), location))
     {}
 #else
diff --git a/src/corelib/kernel/qsystemerror.cpp b/src/corelib/kernel/qsystemerror.cpp
index a2df9dee93..030c38e045 100644
--- a/src/corelib/kernel/qsystemerror.cpp
+++ b/src/corelib/kernel/qsystemerror.cpp
@@ -76,7 +76,7 @@ namespace {
 static QString windowsErrorString(int errorCode)
 {
     QString ret;
-    wchar_t *string = 0;
+    wchar_t *string = nullptr;
     FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM,
                   NULL,
                   errorCode,
diff --git a/src/corelib/plugin/qmachparser.cpp b/src/corelib/plugin/qmachparser.cpp
index 11670cafe9..9d0b4de4f5 100644
--- a/src/corelib/plugin/qmachparser.cpp
+++ b/src/corelib/plugin/qmachparser.cpp
@@ -103,7 +103,7 @@ int QMachOParser::parse(const char *m_s, ulong fdlen, const QString &library, QS
         return ns(QLibrary::tr("file too small"), library, errorString);
 
     // find out if this is a fat Mach-O binary first
-    const my_mach_header *header = 0;
+    const my_mach_header *header = nullptr;
     const fat_header *fat = reinterpret_cast<const fat_header *>(m_s);
     if (fat->magic == qToBigEndian(FAT_MAGIC)) {
         // find our architecture in the binary
diff --git a/src/corelib/thread/qthread.cpp b/src/corelib/thread/qthread.cpp
index e0d252b8ee..2f6a7a18ba 100644
--- a/src/corelib/thread/qthread.cpp
+++ b/src/corelib/thread/qthread.cpp
@@ -895,7 +895,7 @@ bool QThread::isRunning() const
 }
 
 // No threads: so we can just use static variables
-static QThreadData *data = 0;
+static QThreadData *data = nullptr;
 
 QThreadData *QThreadData::current(bool createIfNecessary)
 {
diff --git a/src/corelib/thread/qthread_p.h b/src/corelib/thread/qthread_p.h
index c853bd1de4..0a73bf8a36 100644
--- a/src/corelib/thread/qthread_p.h
+++ b/src/corelib/thread/qthread_p.h
@@ -208,7 +208,7 @@ public:
 class QThreadPrivate : public QObjectPrivate
 {
 public:
-    QThreadPrivate(QThreadData *d = 0);
+    QThreadPrivate(QThreadData *d = nullptr);
     ~QThreadPrivate();
 
     mutable QMutex mutex;
diff --git a/src/corelib/tools/qscopedpointer.cpp b/src/corelib/tools/qscopedpointer.cpp
index eb08bdba62..7647916e99 100644
--- a/src/corelib/tools/qscopedpointer.cpp
+++ b/src/corelib/tools/qscopedpointer.cpp
@@ -126,7 +126,7 @@ QT_BEGIN_NAMESPACE
  */
 
 /*!
-    \fn template <typename T, typename Cleanup> QScopedPointer<T, Cleanup>::QScopedPointer(T *p = 0)
+    \fn template <typename T, typename Cleanup> QScopedPointer<T, Cleanup>::QScopedPointer(T *p = nullptr)
 
     Constructs this QScopedPointer instance and sets its pointer to \a p.
 */
@@ -242,7 +242,7 @@ QT_BEGIN_NAMESPACE
 */
 
 /*!
-    \fn template <typename T, typename Cleanup> void QScopedPointer<T, Cleanup>::reset(T *other = 0)
+    \fn template <typename T, typename Cleanup> void QScopedPointer<T, Cleanup>::reset(T *other = nullptr)
 
     Deletes the existing object it is pointing to (if any), and sets its pointer to
     \a other. QScopedPointer now owns \a other and will delete it in its
diff --git a/src/corelib/tools/qscopedpointer_p.h b/src/corelib/tools/qscopedpointer_p.h
index c1c44e7695..233c2201dc 100644
--- a/src/corelib/tools/qscopedpointer_p.h
+++ b/src/corelib/tools/qscopedpointer_p.h
@@ -64,7 +64,7 @@ template <typename T, typename Cleanup = QScopedPointerDeleter<T> >
 class QCustomScopedPointer : public QScopedPointer<T, Cleanup>
 {
 public:
-    explicit inline QCustomScopedPointer(T *p = 0)
+    explicit inline QCustomScopedPointer(T *p = nullptr)
         : QScopedPointer<T, Cleanup>(p)
     {
     }
@@ -107,7 +107,7 @@ template <typename T>
 class QScopedSharedPointer : public QCustomScopedPointer<T, QScopedPointerSharedDeleter<T> >
 {
 public:
-    explicit inline QScopedSharedPointer(T *p = 0)
+    explicit inline QScopedSharedPointer(T *p = nullptr)
         : QCustomScopedPointer<T, QScopedPointerSharedDeleter<T> >(p)
     {
     }