More nullptr usage in headers

Diff generated by running clang-tidy's modernize-use-nullptr checker on
the CMake-based Qt version.

Skipping src/3rdparty, examples/, tests/

Change-Id: Ib182074e2e2fd52f63093f73b3e2e4c0cb7af188
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

src/concurrent/qtconcurrentcompilertest.h

@@ -52,7 +52,7 @@ template<class T>
 class HasResultType {
     typedef char Yes;
     typedef void *No;
-    template<typename U> static Yes test(int, const typename U::result_type * = 0);
+    template<typename U> static Yes test(int, const typename U::result_type * = nullptr);
     template<typename U> static No test(double);
 public:
     enum { Value = (sizeof(test<T>(0)) == sizeof(Yes)) };

src/concurrent/qtconcurrentfilterkernel.h

@@ -266,7 +266,7 @@ public:
         if (keep(*it))
             this->reportResult(&(*it), index);
         else
-            this->reportResult(0, index);
+            this->reportResult(nullptr, index);
         return false;
     }
 

src/concurrent/qtconcurrentmapkernel.h

@@ -74,7 +74,7 @@ public:
         Iterator it = sequenceBeginIterator;
         std::advance(it, beginIndex);
         for (int i = beginIndex; i < endIndex; ++i) {
-            runIteration(it, i, 0);
+            runIteration(it, i, nullptr);
             std::advance(it, 1);
         }
 

src/corelib/animation/qabstractanimation_p.h

@@ -78,7 +78,7 @@ public:
           hasRegisteredTimer(false),
           isPause(false),
           isGroup(false),
-          group(0)
+          group(nullptr)
     {
     }
 

src/corelib/animation/qanimationgroup_p.h

@@ -76,7 +76,7 @@ public:
     void disconnectUncontrolledAnimation(QAbstractAnimation *anim)
     {
         //0 for the signal here because we might be called from the animation destructor
-        QObject::disconnect(anim, 0, q_func(), SLOT(_q_uncontrolledAnimationFinished()));
+        QObject::disconnect(anim, nullptr, q_func(), SLOT(_q_uncontrolledAnimationFinished()));
     }
 
     void connectUncontrolledAnimation(QAbstractAnimation *anim)

src/corelib/animation/qpropertyanimation_p.h

@@ -64,7 +64,7 @@ class QPropertyAnimationPrivate : public QVariantAnimationPrivate
    Q_DECLARE_PUBLIC(QPropertyAnimation)
 public:
     QPropertyAnimationPrivate()
-        : targetValue(0), propertyType(0), propertyIndex(-1)
+        : targetValue(nullptr), propertyType(0), propertyIndex(-1)
     {
     }
 

src/corelib/animation/qsequentialanimationgroup_p.h

@@ -63,7 +63,7 @@ class QSequentialAnimationGroupPrivate : public QAnimationGroupPrivate
     Q_DECLARE_PUBLIC(QSequentialAnimationGroup)
 public:
     QSequentialAnimationGroupPrivate()
-        : currentAnimation(0), currentAnimationIndex(-1), lastLoop(0)
+        : currentAnimation(nullptr), currentAnimationIndex(-1), lastLoop(0)
     { }
 
 

src/corelib/codecs/qtextcodec_p.h

@@ -98,7 +98,7 @@ public:
 
     struct ConverterState {
         ConverterState(ConversionFlags f = DefaultConversion)
-            : flags(f), remainingChars(0), invalidChars(0), d(0) { state_data[0] = state_data[1] = state_data[2] = 0; }
+            : flags(f), remainingChars(0), invalidChars(0), d(nullptr) { state_data[0] = state_data[1] = state_data[2] = 0; }
         ~ConverterState() { }
         ConversionFlags flags;
         int remainingChars;

src/corelib/global/qglobalstatic.h

@@ -131,8 +131,8 @@ struct QGlobalStatic
 
     bool isDestroyed() const { return guard.load() <= QtGlobalStatic::Destroyed; }
     bool exists() const { return guard.load() == QtGlobalStatic::Initialized; }
-    operator Type *() { if (isDestroyed()) return 0; return innerFunction(); }
-    Type *operator()() { if (isDestroyed()) return 0; return innerFunction(); }
+    operator Type *() { if (isDestroyed()) return nullptr; return innerFunction(); }
+    Type *operator()() { if (isDestroyed()) return nullptr; return innerFunction(); }
     Type *operator->()
     {
       Q_ASSERT_X(!isDestroyed(), "Q_GLOBAL_STATIC", "The global static was used after being destroyed");

src/corelib/io/qabstractfileengine_p.h

@@ -193,7 +193,7 @@ public:
         uchar *address;
     };
 
-    virtual bool extension(Extension extension, const ExtensionOption *option = 0, ExtensionReturn *output = 0);
+    virtual bool extension(Extension extension, const ExtensionOption *option = nullptr, ExtensionReturn *output = nullptr);
     virtual bool supportsExtension(Extension extension) const;
 
     // Factory

src/corelib/io/qfileinfo_p.h

@@ -80,7 +80,7 @@ public:
     };
 
     inline QFileInfoPrivate()
-        : QSharedData(), fileEngine(0),
+        : QSharedData(), fileEngine(nullptr),
         cachedFlags(0),
         isDefaultConstructed(true),
         cache_enabled(true), fileFlags(0), fileSize(0)

src/corelib/io/qfilesystemengine_p.h

@@ -130,7 +130,7 @@ public:
     static bool removeFile(const QFileSystemEntry &entry, QSystemError &error);
 
     static bool setPermissions(const QFileSystemEntry &entry, QFile::Permissions permissions, QSystemError &error,
-                               QFileSystemMetaData *data = 0);
+                               QFileSystemMetaData *data = nullptr);
 
     // unused, therefore not implemented
     static bool setFileTime(const QFileSystemEntry &entry, const QDateTime &newDate,

src/corelib/io/qfilesystemmetadata_p.h

@@ -76,7 +76,7 @@ class Q_AUTOTEST_EXPORT QFileSystemMetaData
 {
 public:
     QFileSystemMetaData()
-        : knownFlagsMask(0),
+        : knownFlagsMask(nullptr),
           size_(-1)
     {
     }
@@ -184,7 +184,7 @@ public:
 
     void clear()
     {
-        knownFlagsMask = 0;
+        knownFlagsMask = nullptr;
     }
 
     void clearFlags(MetaDataFlags flags = AllMetaDataFlags)

src/corelib/io/qfsfileengine_p.h

@@ -115,7 +115,7 @@ public:
     virtual bool isUnnamedFile() const
     { return false; }
 
-    bool extension(Extension extension, const ExtensionOption *option = 0, ExtensionReturn *output = 0) override;
+    bool extension(Extension extension, const ExtensionOption *option = nullptr, ExtensionReturn *output = nullptr) override;
     bool supportsExtension(Extension extension) const override;
 
     //FS only!!

src/corelib/io/qprocess_p.h

@@ -247,7 +247,7 @@ public:
             // if you add "= 4" here, increase the number of bits below
         };
 
-        Channel() : process(0), notifier(0), type(Normal), closed(false), append(false)
+        Channel() : process(nullptr), notifier(nullptr), type(Normal), closed(false), append(false)
         {
             pipe[0] = INVALID_Q_PIPE;
             pipe[1] = INVALID_Q_PIPE;

src/corelib/io/qresource_p.h

@@ -108,7 +108,7 @@ public:
     Iterator *beginEntryList(QDir::Filters filters, const QStringList &filterNames) override;
     Iterator *endEntryList() override;
 
-    bool extension(Extension extension, const ExtensionOption *option = 0, ExtensionReturn *output = 0) override;
+    bool extension(Extension extension, const ExtensionOption *option = nullptr, ExtensionReturn *output = nullptr) override;
     bool supportsExtension(Extension extension) const override;
 };
 

src/corelib/io/qurl_p.h

@@ -59,7 +59,7 @@ QT_BEGIN_NAMESPACE
 
 // in qurlrecode.cpp
 extern Q_AUTOTEST_EXPORT int qt_urlRecode(QString &appendTo, const QChar *begin, const QChar *end,
-                                          QUrl::ComponentFormattingOptions encoding, const ushort *tableModifications = 0);
+                                          QUrl::ComponentFormattingOptions encoding, const ushort *tableModifications = nullptr);
 
 // in qurlidna.cpp
 enum AceLeadingDot { AllowLeadingDot, ForbidLeadingDot };

src/corelib/itemmodels/qabstractitemmodel_p.h

@@ -98,7 +98,7 @@ public:
     void itemsMoved(const QModelIndex &srcParent, int srcFirst, int srcLast, const QModelIndex &destinationParent, int destinationChild, Qt::Orientation orientation);
     bool allowMove(const QModelIndex &srcParent, int srcFirst, int srcLast, const QModelIndex &destinationParent, int destinationChild, Qt::Orientation orientation);
 
-    inline QModelIndex createIndex(int row, int column, void *data = 0) const {
+    inline QModelIndex createIndex(int row, int column, void *data = nullptr) const {
         return q_func()->createIndex(row, column, data);
     }
 

src/corelib/itemmodels/qabstractproxymodel_p.h

@@ -62,7 +62,7 @@ class Q_CORE_EXPORT QAbstractProxyModelPrivate : public QAbstractItemModelPrivat
 {
     Q_DECLARE_PUBLIC(QAbstractProxyModel)
 public:
-    QAbstractProxyModelPrivate() : QAbstractItemModelPrivate(), model(0) {}
+    QAbstractProxyModelPrivate() : QAbstractItemModelPrivate(), model(nullptr) {}
     QAbstractItemModel *model;
     virtual void _q_sourceModelDestroyed();
     void mapDropCoordinatesToSource(int row, int column, const QModelIndex &parent,

src/corelib/itemmodels/qitemselectionmodel_p.h

@@ -62,7 +62,7 @@ class QItemSelectionModelPrivate: public QObjectPrivate
     Q_DECLARE_PUBLIC(QItemSelectionModel)
 public:
     QItemSelectionModelPrivate()
-      : model(0),
+      : model(nullptr),
         currentCommand(QItemSelectionModel::NoUpdate),
         tableSelected(false), tableColCount(0), tableRowCount(0) {}
 

src/corelib/kernel/qcore_unix_p.h

@@ -171,7 +171,7 @@ inline void qt_ignore_sigpipe()
         struct sigaction noaction;
         memset(&noaction, 0, sizeof(noaction));
         noaction.sa_handler = SIG_IGN;
-        ::sigaction(SIGPIPE, &noaction, 0);
+        ::sigaction(SIGPIPE, &noaction, nullptr);
         atom.store(1);
     }
 }

src/corelib/kernel/qcoreapplication_p.h

@@ -149,7 +149,7 @@ public:
     QString cachedApplicationDirPath;
     static QString *cachedApplicationFilePath;
     static void setApplicationFilePath(const QString &path);
-    static inline void clearApplicationFilePath() { delete cachedApplicationFilePath; cachedApplicationFilePath = 0; }
+    static inline void clearApplicationFilePath() { delete cachedApplicationFilePath; cachedApplicationFilePath = nullptr; }
 
 #ifndef QT_NO_QOBJECT
     void execCleanup();

src/corelib/kernel/qeventdispatcher_glib_p.h

@@ -66,8 +66,8 @@ class Q_CORE_EXPORT QEventDispatcherGlib : public QAbstractEventDispatcher
     Q_DECLARE_PRIVATE(QEventDispatcherGlib)
 
 public:
-    explicit QEventDispatcherGlib(QObject *parent = 0);
-    explicit QEventDispatcherGlib(GMainContext *context, QObject *parent = 0);
+    explicit QEventDispatcherGlib(QObject *parent = nullptr);
+    explicit QEventDispatcherGlib(GMainContext *context, QObject *parent = nullptr);
     ~QEventDispatcherGlib();
 
     bool processEvents(QEventLoop::ProcessEventsFlags flags) override;
@@ -102,7 +102,7 @@ class Q_CORE_EXPORT QEventDispatcherGlibPrivate : public QAbstractEventDispatche
 {
 
 public:
-    QEventDispatcherGlibPrivate(GMainContext *context = 0);
+    QEventDispatcherGlibPrivate(GMainContext *context = nullptr);
     GMainContext *mainContext;
     GPostEventSource *postEventSource;
     GSocketNotifierSource *socketNotifierSource;

src/corelib/kernel/qeventdispatcher_unix_p.h

@@ -102,7 +102,7 @@ class Q_CORE_EXPORT QEventDispatcherUNIX : public QAbstractEventDispatcher
     Q_DECLARE_PRIVATE(QEventDispatcherUNIX)
 
 public:
-    explicit QEventDispatcherUNIX(QObject *parent = 0);
+    explicit QEventDispatcherUNIX(QObject *parent = nullptr);
     ~QEventDispatcherUNIX();
 
     bool processEvents(QEventLoop::ProcessEventsFlags flags) override;
@@ -123,7 +123,7 @@ public:
     void flush() override;
 
 protected:
-    QEventDispatcherUNIX(QEventDispatcherUNIXPrivate &dd, QObject *parent = 0);
+    QEventDispatcherUNIX(QEventDispatcherUNIXPrivate &dd, QObject *parent = nullptr);
 };
 
 class Q_CORE_EXPORT QEventDispatcherUNIXPrivate : public QAbstractEventDispatcherPrivate
@@ -152,9 +152,9 @@ public:
 
 inline QSocketNotifierSetUNIX::QSocketNotifierSetUNIX() Q_DECL_NOTHROW
 {
-    notifiers[0] = 0;
-    notifiers[1] = 0;
-    notifiers[2] = 0;
+    notifiers[0] = nullptr;
+    notifiers[1] = nullptr;
+    notifiers[2] = nullptr;
 }
 
 inline bool QSocketNotifierSetUNIX::isEmpty() const Q_DECL_NOTHROW

src/corelib/kernel/qmetaobject_moc_p.h

@@ -138,7 +138,7 @@ static QByteArray normalizeTypeInternal(const char *t, const char *e, bool fixSc
             { "struct ", 7 },
             { "class ", 6 },
             { "enum ", 5 },
-            { 0, 0 }
+            { nullptr, 0 }
         };
         int i = 0;
         do {
@@ -146,7 +146,7 @@ static QByteArray normalizeTypeInternal(const char *t, const char *e, bool fixSc
                 t += optional[i].len;
                 break;
             }
-        } while (optional[++i].keyword != 0);
+        } while (optional[++i].keyword != nullptr);
     }
 
     bool star = false;

src/corelib/kernel/qmetaobject_p.h

@@ -226,8 +226,8 @@ struct QMetaObjectPrivate
     static QObjectPrivate::Connection *connect(const QObject *sender, int signal_index,
                         const QMetaObject *smeta,
                         const QObject *receiver, int method_index_relative,
-                        const QMetaObject *rmeta = 0,
-                        int type = 0, int *types = 0);
+                        const QMetaObject *rmeta = nullptr,
+                        int type = 0, int *types = nullptr);
     static bool disconnect(const QObject *sender, int signal_index,
                            const QMetaObject *smeta,
                            const QObject *receiver, int method_index, void **slot,

src/corelib/kernel/qmetaobjectbuilder_p.h

@@ -173,7 +173,7 @@ public:
     void setStaticMetacallFunction(QMetaObjectBuilder::StaticMetacallFunction value);
 
     QMetaObject *toMetaObject() const;
-    QByteArray toRelocatableData(bool * = 0) const;
+    QByteArray toRelocatableData(bool * = nullptr) const;
     static void fromRelocatableData(QMetaObject *, const QMetaObject *, const QByteArray &);
 
 #ifndef QT_NO_DATASTREAM
@@ -196,7 +196,7 @@ private:
 class Q_CORE_EXPORT QMetaMethodBuilder
 {
 public:
-    QMetaMethodBuilder() : _mobj(0), _index(0) {}
+    QMetaMethodBuilder() : _mobj(nullptr), _index(0) {}
 
     int index() const;
 
@@ -238,7 +238,7 @@ private:
 class Q_CORE_EXPORT QMetaPropertyBuilder
 {
 public:
-    QMetaPropertyBuilder() : _mobj(0), _index(0) {}
+    QMetaPropertyBuilder() : _mobj(nullptr), _index(0) {}
 
     int index() const { return _index; }
 
@@ -294,7 +294,7 @@ private:
 class Q_CORE_EXPORT QMetaEnumBuilder
 {
 public:
-    QMetaEnumBuilder() : _mobj(0), _index(0) {}
+    QMetaEnumBuilder() : _mobj(nullptr), _index(0) {}
 
     int index() const { return _index; }
 

src/corelib/kernel/qsharedmemory_p.h

@@ -98,7 +98,7 @@ public:
     {
         if (q_sm && q_sm->lock())
             return true;
-        q_sm = 0;
+        q_sm = nullptr;
         return false;
     }
 

src/corelib/kernel/qvariant_p.h

@@ -88,7 +88,7 @@ inline T *v_cast(const QVariant::Private *nd, T * = 0)
 #else // every other compiler in this world
 
 template <typename T>
-inline const T *v_cast(const QVariant::Private *d, T * = 0)
+inline const T *v_cast(const QVariant::Private *d, T * = nullptr)
 {
     return !QVariantIntegrator<T>::CanUseInternalSpace
             ? static_cast<const T *>(d->data.shared->ptr)
@@ -96,7 +96,7 @@ inline const T *v_cast(const QVariant::Private *d, T * = 0)
 }
 
 template <typename T>
-inline T *v_cast(QVariant::Private *d, T * = 0)
+inline T *v_cast(QVariant::Private *d, T * = nullptr)
 {
     return !QVariantIntegrator<T>::CanUseInternalSpace
             ? static_cast<T *>(d->data.shared->ptr)
@@ -154,7 +154,7 @@ inline void v_construct(QVariant::Private *x, const T &t)
 
 // constructs a new variant if copy is 0, otherwise copy-constructs
 template <class T>
-inline void v_construct(QVariant::Private *x, const void *copy, T * = 0)
+inline void v_construct(QVariant::Private *x, const void *copy, T * = nullptr)
 {
     if (copy)
         v_construct<T>(x, *static_cast<const T *>(copy));
@@ -164,7 +164,7 @@ inline void v_construct(QVariant::Private *x, const void *copy, T * = 0)
 
 // deletes the internal structures
 template <class T>
-inline void v_clear(QVariant::Private *d, T* = 0)
+inline void v_clear(QVariant::Private *d, T* = nullptr)
 {
 
     if (!QVariantIntegrator<T>::CanUseInternalSpace) {
@@ -264,7 +264,7 @@ class QVariantIsNull
         struct No { char unused[2]; };
         Q_STATIC_ASSERT(sizeof(Yes) != sizeof(No));
 
-        template<class C> static decltype(static_cast<const C*>(0)->isNull(), Yes()) test(int);
+        template<class C> static decltype(static_cast<const C*>(nullptr)->isNull(), Yes()) test(int);
         template<class C> static No test(...);
     public:
         static const bool Value = (sizeof(test<T>(0)) == sizeof(Yes));

src/corelib/plugin/qlibrary_p.h

@@ -96,7 +96,7 @@ public:
     void setLoadHints(QLibrary::LoadHints lh);
 
     static QLibraryPrivate *findOrCreate(const QString &fileName, const QString &version = QString(),
-                                         QLibrary::LoadHints loadHints = 0);
+                                         QLibrary::LoadHints loadHints = nullptr);
     static QStringList suffixes_sys(const QString &fullVersion);
     static QStringList prefixes_sys();
 

src/corelib/serialization/qjson_p.h

@@ -686,7 +686,7 @@ public:
     {
     }
     inline Data(int reserved, QJsonValue::Type valueType)
-        : rawData(0), compactionCounter(0), ownsData(true)
+        : rawData(nullptr), compactionCounter(0), ownsData(true)
     {
         Q_ASSERT(valueType == QJsonValue::Array || valueType == QJsonValue::Object);
 
@@ -728,7 +728,7 @@ public:
             size = qMax(size + reserve, qMin(size *2, (int)Value::MaxSize));
             if (size > Value::MaxSize) {
                 qWarning("QJson: Document too large to store in data structure");
-                return 0;
+                return nullptr;
             }
         }
         char *raw = (char *)malloc(size);

src/corelib/serialization/qxmlstream_p.h

@@ -162,12 +162,12 @@ public:
 
 
 const char *const QXmlStreamReader_Table::spell [] = {
-  "end of file", 0, " ", "<", ">", "&", "#", "\'", "\"", "[", 
+  "end of file", nullptr, " ", "<", ">", "&", "#", "\'", "\"", "[",
   "]", "(", ")", "|", "=", "%", "/", ":", ";", ",", 
   "-", "+", "*", ".", "?", "!", "[a-zA-Z]", "[0-9]", "[CDATA[", "DOCTYPE", 
   "ELEMENT", "ATTLIST", "ENTITY", "NOTATION", "SYSTEM", "PUBLIC", "NDATA", "REQUIRED", "IMPLIED", "FIXED", 
-  "EMPTY", "ANY", "PCDATA", 0, 0, 0, 0, "CDATA", "ID", "IDREF", 
-  "IDREFS", "ENTITIES", "NMTOKEN", "NMTOKENS", "<?xml", "version", 0};
+  "EMPTY", "ANY", "PCDATA", nullptr, nullptr, nullptr, nullptr, "CDATA", "ID", "IDREF",
+  "IDREFS", "ENTITIES", "NMTOKEN", "NMTOKENS", "<?xml", "version", nullptr};
 
 const short QXmlStreamReader_Table::lhs [] = {
   57, 57, 59, 59, 59, 59, 59, 59, 59, 59, 
@@ -645,7 +645,7 @@ template <typename T> class QXmlStreamSimpleStack {
     T *data;
     int tos, cap;
 public:
-    inline QXmlStreamSimpleStack():data(0), tos(-1), cap(0){}
+    inline QXmlStreamSimpleStack():data(nullptr), tos(-1), cap(0){}
     inline ~QXmlStreamSimpleStack(){ if (data) free(data); }
 
     inline void reserve(int extraCapacity) {
@@ -995,7 +995,7 @@ public:
     int fastScanLiteralContent();
     int fastScanSpace();
     int fastScanContentCharList();
-    int fastScanName(int *prefix = 0);
+    int fastScanName(int *prefix = nullptr);
     inline int fastScanNMTOKEN();
 
 

src/corelib/statemachine/qstate_p.h

@@ -68,14 +68,14 @@ QT_BEGIN_NAMESPACE
 struct QPropertyAssignment
 {
     QPropertyAssignment()
-        : object(0), explicitlySet(true) {}
+        : object(nullptr), explicitlySet(true) {}
     QPropertyAssignment(QObject *o, const QByteArray &n,
                         const QVariant &v, bool es = true)
         : object(o), propertyName(n), value(v), explicitlySet(es)
         {}
 
     bool objectDeleted() const { return !object; }
-    void write() const { Q_ASSERT(object != 0); object->setProperty(propertyName, value); }
+    void write() const { Q_ASSERT(object != nullptr); object->setProperty(propertyName, value); }
     bool hasTarget(QObject *o, const QByteArray &pn) const
     { return object == o && propertyName == pn; }
 
@@ -99,8 +99,8 @@ public:
     QStatePrivate();
     ~QStatePrivate();
 
-    static QStatePrivate *get(QState *q) { return q ? q->d_func() : 0; }
-    static const QStatePrivate *get(const QState *q) { return q? q->d_func() : 0; }
+    static QStatePrivate *get(QState *q) { return q ? q->d_func() : nullptr; }
+    static const QStatePrivate *get(const QState *q) { return q? q->d_func() : nullptr; }
 
     QList<QAbstractState*> childStates() const;
     QList<QHistoryState*> historyStates() const;

src/corelib/statemachine/qstatemachine_p.h

@@ -108,7 +108,7 @@ public:
     ~QStateMachinePrivate();
 
     static QStateMachinePrivate *get(QStateMachine *q)
-    { return q ? q->d_func() : 0; }
+    { return q ? q->d_func() : nullptr; }
 
     QState *findLCA(const QList<QAbstractState*> &states, bool onlyCompound = false) const;
     QState *findLCCA(const QList<QAbstractState*> &states) const;
@@ -313,7 +313,7 @@ public:
         DelayedEvent(QEvent *e, int tid)
             : event(e), timerId(tid) {}
         DelayedEvent()
-            : event(0), timerId(0) {}
+            : event(nullptr), timerId(0) {}
     };
     QHash<int, DelayedEvent> delayedEvents;
     QHash<int, int> timerIdToDelayedEventId;

src/corelib/thread/qatomic_bootstrap.h

@@ -65,7 +65,7 @@ template <typename T> struct QAtomicOps: QGenericAtomicOps<QAtomicOps<T> >
         return --_q_value != 0;
     }
 
-    static bool testAndSetRelaxed(T &_q_value, T expectedValue, T newValue, T *currentValue = 0) Q_DECL_NOTHROW
+    static bool testAndSetRelaxed(T &_q_value, T expectedValue, T newValue, T *currentValue = nullptr) Q_DECL_NOTHROW
     {
         if (currentValue)
             *currentValue = _q_value;

src/corelib/thread/qresultstore.h

@@ -142,7 +142,7 @@ public:
     template <typename T>
     int addResult(int index, const T *result)
     {
-        if (result == 0)
+        if (result == nullptr)
             return addResult(index, static_cast<void *>(nullptr));
         else
             return addResult(index, static_cast<void *>(new T(*result)));
@@ -158,7 +158,7 @@ public:
     int addResults(int index, const QVector<T> *results, int totalCount)
     {
         if (m_filterMode == true && results->count() != totalCount && 0 == results->count())
-            return addResults(index, 0, 0, totalCount);
+            return addResults(index, nullptr, 0, totalCount);
         else
             return addResults(index, new QVector<T>(*results), results->count(), totalCount);
     }

src/corelib/thread/qthread_p.h

@@ -89,7 +89,7 @@ public:
     QEvent *event;
     int priority;
     inline QPostEvent()
-        : receiver(0), event(0), priority(0)
+        : receiver(nullptr), event(nullptr), priority(0)
     { }
     inline QPostEvent(QObject *r, QEvent *e, int p)
         : receiver(r), event(e), priority(p)
@@ -148,7 +148,7 @@ private:
 class Q_CORE_EXPORT QDaemonThread : public QThread
 {
 public:
-    QDaemonThread(QObject *parent = 0);
+    QDaemonThread(QObject *parent = nullptr);
     ~QDaemonThread();
 };
 
@@ -157,7 +157,7 @@ class QThreadPrivate : public QObjectPrivate
     Q_DECLARE_PUBLIC(QThread)
 
 public:
-    QThreadPrivate(QThreadData *d = 0);
+    QThreadPrivate(QThreadData *d = nullptr);
     ~QThreadPrivate();
 
     void setPriority(QThread::Priority prio);
@@ -248,7 +248,7 @@ public:
 #endif
     static void clearCurrentThreadData();
     static QThreadData *get2(QThread *thread)
-    { Q_ASSERT_X(thread != 0, "QThread", "internal error"); return thread->d_func()->data; }
+    { Q_ASSERT_X(thread != nullptr, "QThread", "internal error"); return thread->d_func()->data; }
 
 
     void ref();
@@ -281,7 +281,7 @@ public:
 
     public:
         FlaggedDebugSignatures() : idx(0)
-        { std::fill_n(locations, Count, static_cast<char*>(0)); }
+        { std::fill_n(locations, Count, static_cast<char*>(nullptr)); }
 
         void store(const char* method)
         { locations[idx++ % Count] = method; }
@@ -328,7 +328,7 @@ class QAdoptedThread : public QThread
     Q_DECLARE_PRIVATE(QThread)
 
 public:
-    QAdoptedThread(QThreadData *data = 0);
+    QAdoptedThread(QThreadData *data = nullptr);
     ~QAdoptedThread();
     void init();
 

src/corelib/thread/qthreadpool_p.h

@@ -162,7 +162,7 @@ public:
     void tryToStartMoreThreads();
     bool tooManyThreadsActive() const;
 
-    void startThread(QRunnable *runnable = 0);
+    void startThread(QRunnable *runnable = nullptr);
     void reset();
     bool waitForDone(int msecs);
     bool waitForDone(const QDeadlineTimer &timer);

src/corelib/thread/qthreadstorage.h

@@ -69,7 +69,7 @@ inline
 T *&qThreadStorage_localData(QThreadStorageData &d, T **)
 {
     void **v = d.get();
-    if (!v) v = d.set(0);
+    if (!v) v = d.set(nullptr);
     return *(reinterpret_cast<T**>(v));
 }
 
@@ -139,7 +139,7 @@ public:
     inline ~QThreadStorage() { }
 
     inline bool hasLocalData() const
-    { return d.get() != 0; }
+    { return d.get() != nullptr; }
 
     inline T& localData()
     { return qThreadStorage_localData(d, reinterpret_cast<T*>(0)); }

src/corelib/tools/qcache.h

@@ -51,7 +51,7 @@ class QCache
     struct Node {
         inline Node() : keyPtr(0) {}
         inline Node(T *data, int cost)
-            : keyPtr(0), t(data), c(cost), p(0), n(0) {}
+            : keyPtr(nullptr), t(data), c(cost), p(nullptr), n(nullptr) {}
         const Key *keyPtr; T *t; int c; Node *p,*n;
     };
     Node *f, *l;
@@ -71,14 +71,14 @@ class QCache
     inline T *relink(const Key &key) {
         typename QHash<Key, Node>::iterator i = hash.find(key);
         if (typename QHash<Key, Node>::const_iterator(i) == hash.constEnd())
-            return 0;
+            return nullptr;
 
         Node &n = *i;
         if (f != &n) {
             if (n.p) n.p->n = n.n;
             if (n.n) n.n->p = n.p;
             if (l == &n) l = n.p;
-            n.p = 0;
+            n.p = nullptr;
             n.n = f;
             f->p = &n;
             f = &n;
@@ -117,12 +117,12 @@ private:
 
 template <class Key, class T>
 inline QCache<Key, T>::QCache(int amaxCost) Q_DECL_NOTHROW
-    : f(0), l(0), mx(amaxCost), total(0) {}
+    : f(nullptr), l(nullptr), mx(amaxCost), total(0) {}
 
 template <class Key, class T>
 inline void QCache<Key,T>::clear()
 { while (f) { delete f->t; f = f->n; }
- hash.clear(); l = 0; total = 0; }
+ hash.clear(); l = nullptr; total = 0; }
 
 template <class Key, class T>
 inline void QCache<Key,T>::setMaxCost(int m)
@@ -153,11 +153,11 @@ inline T *QCache<Key,T>::take(const Key &key)
 {
     typename QHash<Key, Node>::iterator i = hash.find(key);
     if (i == hash.end())
-        return 0;
+        return nullptr;
 
     Node &n = *i;
     T *t = n.t;
-    n.t = 0;
+    n.t = nullptr;
     unlink(n);
     return t;
 }

src/corelib/tools/qdatetime_p.h

@@ -135,7 +135,7 @@ public:
 #if QT_CONFIG(timezone)
     static qint64 zoneMSecsToEpochMSecs(qint64 msecs, const QTimeZone &zone,
                                         DaylightStatus hint = UnknownDaylightTime,
-                                        QDate *localDate = 0, QTime *localTime = 0);
+                                        QDate *localDate = nullptr, QTime *localTime = nullptr);
 
     // Inlined for its one caller in qdatetime.cpp
     inline void setUtcOffsetByTZ(qint64 atMSecsSinceEpoch);

src/corelib/tools/qdatetimeparser_p.h

@@ -86,7 +86,7 @@ public:
         DateTimeEdit
     };
     QDateTimeParser(QVariant::Type t, Context ctx)
-        : currentSectionIndex(-1), display(0), cachedDay(-1), parserType(t),
+        : currentSectionIndex(-1), display(nullptr), cachedDay(-1), parserType(t),
         fixday(false), spec(Qt::LocalTime), context(ctx)
     {
         defaultLocale = QLocale::system();
@@ -218,9 +218,9 @@ private:
     ParsedSection parseSection(const QDateTime &currentValue, int sectionIndex,
                                int offset, QString *text) const;
     int findMonth(const QString &str1, int monthstart, int sectionIndex,
-                  QString *monthName = 0, int *used = 0) const;
+                  QString *monthName = nullptr, int *used = nullptr) const;
     int findDay(const QString &str1, int intDaystart, int sectionIndex,
-                QString *dayName = 0, int *used = 0) const;
+                QString *dayName = nullptr, int *used = nullptr) const;
     ParsedSection findTimeZone(QStringRef str, const QDateTime &when,
                                int maxVal, int minVal) const;
 #if QT_CONFIG(timezone)
@@ -236,7 +236,7 @@ private:
         PossiblePM = 3,
         PossibleBoth = 4
     };
-    AmPmFinder findAmPm(QString &str, int index, int *used = 0) const;
+    AmPmFinder findAmPm(QString &str, int index, int *used = nullptr) const;
 #endif // datestring
 
     bool potentialValue(const QStringRef &str, int min, int max, int index,

src/corelib/tools/qfreelist_p.h

@@ -249,11 +249,11 @@ inline int QFreeList<T, ConstantsType>::next()
 
         if (!v) {
             v = allocate((id & ConstantsType::IndexMask) - at, ConstantsType::Sizes[block]);
-            if (!_v[block].testAndSetRelease(0, v)) {
+            if (!_v[block].testAndSetRelease(nullptr, v)) {
                 // race with another thread lost
                 delete [] v;
                 v = _v[block].loadAcquire();
-                Q_ASSERT(v != 0);
+                Q_ASSERT(v != nullptr);
             }
         }
 

src/corelib/tools/qlist.h

@@ -526,7 +526,7 @@ inline typename QList<T>::iterator QList<T>::insert(iterator before, const T &t)
     Q_ASSERT_X(isValidIterator(before), "QList::insert", "The specified iterator argument 'before' is invalid");
 
     int iBefore = int(before.i - reinterpret_cast<Node *>(p.begin()));
-    Node *n = 0;
+    Node *n = nullptr;
     if (d->ref.isShared())
         n = detach_helper_grow(iBefore, 1);
     else

src/corelib/tools/qlocale_p.h

@@ -249,7 +249,7 @@ public:
         if (qIsInf(d))
             return float(d);
         if (std::fabs(d) > std::numeric_limits<float>::max()) {
-            if (ok != 0)
+            if (ok != nullptr)
                 *ok = false;
             const float huge = std::numeric_limits<float>::infinity();
             return d < 0 ? -huge : huge;

src/dbus/qdbusargument_p.h

@@ -71,7 +71,7 @@ class QDBusArgumentPrivate
 {
 public:
     inline QDBusArgumentPrivate(int flags = 0)
-        : message(0), ref(1), capabilities(flags)
+        : message(nullptr), ref(1), capabilities(flags)
     { }
     virtual ~QDBusArgumentPrivate();
 
@@ -104,7 +104,7 @@ public:
 class QDBusMarshaller: public QDBusArgumentPrivate
 {
 public:
-    QDBusMarshaller(int flags) : QDBusArgumentPrivate(flags), parent(0), ba(0), closeCode(0), ok(true), skipSignature(false)
+    QDBusMarshaller(int flags) : QDBusArgumentPrivate(flags), parent(nullptr), ba(nullptr), closeCode(0), ok(true), skipSignature(false)
     { direction = Marshalling; }
     ~QDBusMarshaller();
 
@@ -161,7 +161,7 @@ private:
 class QDBusDemarshaller: public QDBusArgumentPrivate
 {
 public:
-    inline QDBusDemarshaller(int flags) : QDBusArgumentPrivate(flags), parent(0)
+    inline QDBusDemarshaller(int flags) : QDBusArgumentPrivate(flags), parent(nullptr)
     { direction = Demarshalling; }
     ~QDBusDemarshaller();
 

src/dbus/qdbusconnection_p.h

@@ -115,7 +115,7 @@ public:
 
     struct Watcher
     {
-        Watcher(): watch(0), read(0), write(0) {}
+        Watcher(): watch(nullptr), read(nullptr), write(nullptr) {}
         DBusWatch *watch;
         QSocketNotifier *read;
         QSocketNotifier *write;
@@ -132,7 +132,7 @@ public:
 
     struct SignalHook
     {
-        inline SignalHook() : obj(0), midx(-1) { }
+        inline SignalHook() : obj(nullptr), midx(-1) { }
         QString service, path, signature;
         QObject* obj;
         int midx;
@@ -150,9 +150,9 @@ public:
     {
         typedef QVector<ObjectTreeNode> DataList;
 
-        inline ObjectTreeNode() : obj(0), flags(0) { }
+        inline ObjectTreeNode() : obj(nullptr), flags(0) { }
         inline ObjectTreeNode(const QString &n) // intentionally implicit
-            : name(n), obj(0), flags(0) { }
+            : name(n), obj(nullptr), flags(0) { }
         inline bool operator<(const QString &other) const
             { return name < other; }
         inline bool operator<(const QStringRef &other) const
@@ -194,7 +194,7 @@ public:
 
 public:
     // public methods are entry points from other objects
-    explicit QDBusConnectionPrivate(QObject *parent = 0);
+    explicit QDBusConnectionPrivate(QObject *parent = nullptr);
     ~QDBusConnectionPrivate();
 
     void createBusService();

src/dbus/qdbusintegrator_p.h

@@ -106,7 +106,7 @@ class QDBusCallDeliveryEvent: public QMetaCallEvent
 public:
     QDBusCallDeliveryEvent(const QDBusConnection &c, int id, QObject *sender,
                            const QDBusMessage &msg, const QVector<int> &types, int f = 0)
-        : QMetaCallEvent(0, id, 0, sender, -1), connection(c), message(msg), metaTypes(types), flags(f)
+        : QMetaCallEvent(0, id, nullptr, sender, -1), connection(c), message(msg), metaTypes(types), flags(f)
         { }
 
     void placeMetaCall(QObject *object) override
@@ -126,8 +126,8 @@ class QDBusActivateObjectEvent: public QMetaCallEvent
 public:
     QDBusActivateObjectEvent(const QDBusConnection &c, QObject *sender,
                              const QDBusConnectionPrivate::ObjectTreeNode &n,
-                             int p, const QDBusMessage &m, QSemaphore *s = 0)
-        : QMetaCallEvent(0, ushort(-1), 0, sender, -1, 0, 0, 0, s), connection(c), node(n),
+                             int p, const QDBusMessage &m, QSemaphore *s = nullptr)
+        : QMetaCallEvent(0, ushort(-1), nullptr, sender, -1, 0, nullptr, nullptr, s), connection(c), node(n),
           pathStartPos(p), message(m), handled(false)
         { }
     ~QDBusActivateObjectEvent();

src/dbus/qdbuspendingcall_p.h

@@ -99,7 +99,7 @@ public:
     // }
 
     QDBusPendingCallPrivate(const QDBusMessage &sent, QDBusConnectionPrivate *connection)
-        : sentMessage(sent), connection(connection), watcherHelper(0), pending(0)
+        : sentMessage(sent), connection(connection), watcherHelper(nullptr), pending(nullptr)
     { }
     ~QDBusPendingCallPrivate();
     bool setReplyCallback(QObject *target, const char *member);

src/dbus/qdbuspendingreply.h

@@ -156,7 +156,7 @@ public:
     {
         Q_STATIC_ASSERT_X(Index >= 0 && Index < Count, "Index out of bounds");
         typedef typename Select<Index>::Type ResultType;
-        return qdbus_cast<ResultType>(argumentAt(Index), 0);
+        return qdbus_cast<ResultType>(argumentAt(Index), nullptr);
     }
 #endif
 

src/dbus/qdbusutil_p.h

@@ -134,7 +134,7 @@ namespace Q_DBUS_NO_EXPORT QDBusUtil
         return false;
     }
 
-    inline bool checkMemberName(const QString &name, AllowEmptyFlag empty, QDBusError *error, const char *nameType = 0)
+    inline bool checkMemberName(const QString &name, AllowEmptyFlag empty, QDBusError *error, const char *nameType = nullptr)
     {
         if (!nameType) nameType = "member";
         if (name.isEmpty()) {

src/gui/accessible/qaccessiblecache_p.h

@@ -73,7 +73,7 @@ public:
     QAccessibleInterface *interfaceForId(QAccessible::Id id) const;
     QAccessible::Id idForInterface(QAccessibleInterface *iface) const;
     QAccessible::Id insert(QObject *object, QAccessibleInterface *iface) const;
-    void deleteInterface(QAccessible::Id id, QObject *obj = 0);
+    void deleteInterface(QAccessible::Id id, QObject *obj = nullptr);
 
 #ifdef Q_OS_MAC
     QT_MANGLE_NAMESPACE(QMacAccessibilityElement) *elementForId(QAccessible::Id axid) const;

src/gui/image/qimage_p.h

@@ -67,7 +67,7 @@ struct Q_GUI_EXPORT QImageData {        // internal image data
     QImageData();
     ~QImageData();
     static QImageData *create(const QSize &size, QImage::Format format);
-    static QImageData *create(uchar *data, int w, int h,  int bpl, QImage::Format format, bool readOnly, QImageCleanupFunction cleanupFunction = 0, void *cleanupInfo = 0);
+    static QImageData *create(uchar *data, int w, int h,  int bpl, QImage::Format format, bool readOnly, QImageCleanupFunction cleanupFunction = nullptr, void *cleanupInfo = nullptr);
 
     QAtomicInt ref;
 

src/gui/image/qpixmapcache_p.h

@@ -87,7 +87,7 @@ public:
                 && !d->image.d->paintEngine->isActive())
             {
                 delete d->image.d->paintEngine;
-                d->image.d->paintEngine = 0;
+                d->image.d->paintEngine = nullptr;
             }
         }
     }

src/gui/image/qppmhandler_p.h

@@ -71,7 +71,7 @@ public:
     QByteArray name() const override;
 #endif
 
-    static bool canRead(QIODevice *device, QByteArray *subType = 0);
+    static bool canRead(QIODevice *device, QByteArray *subType = nullptr);
 
     QVariant option(ImageOption option) const override;
     void setOption(ImageOption option, const QVariant &value) override;

src/gui/itemmodels/qstandarditemmodel_p.h

@@ -109,11 +109,11 @@ class QStandardItemPrivate
     Q_DECLARE_PUBLIC(QStandardItem)
 public:
     inline QStandardItemPrivate()
-        : model(0),
-          parent(0),
+        : model(nullptr),
+          parent(nullptr),
           rows(0),
           columns(0),
-          q_ptr(0),
+          q_ptr(nullptr),
           lastKnownIndex(-1)
         { }
 
@@ -220,10 +220,10 @@ public:
         if (!index.isValid())
             return root.data();
         if (index.model() != q)
-            return 0;
+            return nullptr;
         QStandardItem *parent = static_cast<QStandardItem*>(index.internalPointer());
-        if (parent == 0)
-            return 0;
+        if (parent == nullptr)
+            return nullptr;
         return parent->child(index.row(), index.column());
     }
 

src/gui/kernel/qdnd_p.h

@@ -73,9 +73,9 @@ class QDragPrivate : public QObjectPrivate
 {
 public:
     QDragPrivate()
-        : source(0)
-        , target(0)
-        , data(0)
+        : source(nullptr)
+        , target(nullptr)
+        , data(nullptr)
     { }
     QObject *source;
     QObject *target;

src/gui/kernel/qguiapplication_p.h

@@ -115,7 +115,7 @@ public:
         if (QCoreApplication::instance())
             return QCoreApplication::instance()->d_func()->threadData->eventDispatcher.load();
         else
-            return 0;
+            return nullptr;
     }
 
     static void processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent *e);
@@ -205,7 +205,7 @@ public:
     static void showModalWindow(QWindow *window);
     static void hideModalWindow(QWindow *window);
     static void updateBlockedStatus(QWindow *window);
-    virtual bool isWindowBlocked(QWindow *window, QWindow **blockingWindow = 0) const;
+    virtual bool isWindowBlocked(QWindow *window, QWindow **blockingWindow = nullptr) const;
     virtual bool popupActive() { return false; }
 
     static ulong mousePressTime;

src/gui/kernel/qinputmethod_p.h

@@ -67,7 +67,7 @@ class QInputMethodPrivate : public QObjectPrivate
     Q_DECLARE_PUBLIC(QInputMethod)
 
 public:
-    inline QInputMethodPrivate() : testContext(0)
+    inline QInputMethodPrivate() : testContext(nullptr)
     {}
     QPlatformInputContext *platformInputContext() const
     {

src/gui/kernel/qopenglcontext_p.h

@@ -131,7 +131,7 @@ class Q_GUI_EXPORT QOpenGLContextGroupPrivate : public QObjectPrivate
     Q_DECLARE_PUBLIC(QOpenGLContextGroup)
 public:
     QOpenGLContextGroupPrivate()
-        : m_context(0)
+        : m_context(nullptr)
         , m_mutex(QMutex::Recursive)
         , m_refs(0)
     {
@@ -198,20 +198,20 @@ class Q_GUI_EXPORT QOpenGLContextPrivate : public QObjectPrivate
     Q_DECLARE_PUBLIC(QOpenGLContext)
 public:
     QOpenGLContextPrivate()
-        : qGLContextHandle(0)
-        , qGLContextDeleteFunction(0)
-        , platformGLContext(0)
-        , shareContext(0)
-        , shareGroup(0)
-        , screen(0)
-        , surface(0)
-        , functions(0)
-        , textureFunctions(0)
+        : qGLContextHandle(nullptr)
+        , qGLContextDeleteFunction(nullptr)
+        , platformGLContext(nullptr)
+        , shareContext(nullptr)
+        , shareGroup(nullptr)
+        , screen(nullptr)
+        , surface(nullptr)
+        , functions(nullptr)
+        , textureFunctions(nullptr)
         , max_texture_size(-1)
         , workaround_brokenFBOReadBack(false)
         , workaround_brokenTexSubImage(false)
         , workaround_missingPrecisionQualifiers(false)
-        , active_engine(0)
+        , active_engine(nullptr)
         , qgl_current_fbo_invalid(false)
         , qgl_current_fbo(nullptr)
         , defaultFboRedirect(0)

src/gui/kernel/qplatformintegration.h

@@ -114,7 +114,7 @@ public:
 
     virtual QPlatformPixmap *createPlatformPixmap(QPlatformPixmap::PixelType type) const;
     virtual QPlatformWindow *createPlatformWindow(QWindow *window) const = 0;
-    virtual QPlatformWindow *createForeignWindow(QWindow *, WId) const { return 0; }
+    virtual QPlatformWindow *createForeignWindow(QWindow *, WId) const { return nullptr; }
     virtual QPlatformBackingStore *createPlatformBackingStore(QWindow *window) const = 0;
 #ifndef QT_NO_OPENGL
     virtual QPlatformOpenGLContext *createPlatformOpenGLContext(QOpenGLContext *context) const;

src/gui/kernel/qplatformtheme.h

@@ -309,7 +309,7 @@ public:
 
     virtual QPixmap standardPixmap(StandardPixmap sp, const QSizeF &size) const;
     virtual QIcon fileIcon(const QFileInfo &fileInfo,
-                           QPlatformTheme::IconOptions iconOptions = 0) const;
+                           QPlatformTheme::IconOptions iconOptions = nullptr) const;
     virtual QIconEngine *createIconEngine(const QString &iconName) const;
 
 #ifndef QT_NO_SHORTCUT

src/gui/kernel/qscreen_p.h

@@ -65,8 +65,8 @@ class QScreenPrivate : public QObjectPrivate
     Q_DECLARE_PUBLIC(QScreen)
 public:
     QScreenPrivate()
-        : platformScreen(0)
-        , orientationUpdateMask(0)
+        : platformScreen(nullptr)
+        , orientationUpdateMask(nullptr)
     {
     }
 

src/gui/kernel/qshapedpixmapdndwindow_p.h

@@ -63,7 +63,7 @@ class QShapedPixmapWindow : public QRasterWindow
 {
     Q_OBJECT
 public:
-    explicit QShapedPixmapWindow(QScreen *screen = 0);
+    explicit QShapedPixmapWindow(QScreen *screen = nullptr);
     ~QShapedPixmapWindow();
 
     void setUseCompositing(bool on) { m_useCompositing = on; }

src/gui/kernel/qwindow_p.h

@@ -79,8 +79,8 @@ public:
         : QObjectPrivate()
         , surfaceType(QWindow::RasterSurface)
         , windowFlags(Qt::Window)
-        , parentWindow(0)
-        , platformWindow(0)
+        , parentWindow(nullptr)
+        , platformWindow(nullptr)
         , visible(false)
         , visibilityOnDestroy(false)
         , exposed(false)
@@ -97,8 +97,8 @@ public:
         , modality(Qt::NonModal)
         , blockedByModalWindow(false)
         , updateRequestPending(false)
-        , transientParent(0)
-        , topLevelScreen(0)
+        , transientParent(nullptr)
+        , topLevelScreen(nullptr)
 #ifndef QT_NO_CURSOR
         , cursor(Qt::ArrowCursor)
         , hasCursor(false)
@@ -119,7 +119,7 @@ public:
 
     void maybeQuitOnLastWindowClosed();
 #ifndef QT_NO_CURSOR
-    void setCursor(const QCursor *c = 0);
+    void setCursor(const QCursor *c = nullptr);
     bool applyCursor();
 #endif
 

src/gui/kernel/qwindowsysteminterface_p.h

@@ -123,7 +123,7 @@ public:
 
     class CloseEvent : public WindowSystemEvent {
     public:
-        explicit CloseEvent(QWindow *w, bool *a = 0)
+        explicit CloseEvent(QWindow *w, bool *a = nullptr)
             : WindowSystemEvent(Close), window(w), accepted(a)
             { }
         QPointer<QWindow> window;
@@ -398,7 +398,7 @@ public:
     class TabletEnterProximityEvent : public InputEvent {
     public:
         TabletEnterProximityEvent(ulong time, int device, int pointerType, qint64 uid)
-            : InputEvent(0, time, TabletEnterProximity, Qt::NoModifier),
+            : InputEvent(nullptr, time, TabletEnterProximity, Qt::NoModifier),
               device(device), pointerType(pointerType), uid(uid) { }
         int device;
         int pointerType;
@@ -408,7 +408,7 @@ public:
     class TabletLeaveProximityEvent : public InputEvent {
     public:
         TabletLeaveProximityEvent(ulong time, int device, int pointerType, qint64 uid)
-            : InputEvent(0, time, TabletLeaveProximity, Qt::NoModifier),
+            : InputEvent(nullptr, time, TabletLeaveProximity, Qt::NoModifier),
               device(device), pointerType(pointerType), uid(uid) { }
         int device;
         int pointerType;
@@ -474,7 +474,7 @@ public:
             for (int i = 0; i < impl.size(); ++i)
                 if (!(impl.at(i)->type & QWindowSystemInterfacePrivate::UserInputEvent))
                     return impl.takeAt(i);
-            return 0;
+            return nullptr;
         }
         bool nonUserInputEventsQueued()
         {
@@ -495,7 +495,7 @@ public:
                 if (impl.at(i)->type == t)
                     return impl.at(i);
             }
-            return 0;
+            return nullptr;
         }
         void remove(const WindowSystemEvent *e)
         {

src/gui/opengl/qopenglengineshadermanager_p.h

@@ -370,7 +370,7 @@ private:
 class QOpenGLEngineShaderProg
 {
 public:
-    QOpenGLEngineShaderProg() : program(0) {}
+    QOpenGLEngineShaderProg() : program(nullptr) {}
 
     ~QOpenGLEngineShaderProg() {
         if (program)

src/gui/opengl/qopenglextensions_p.h

@@ -107,7 +107,7 @@ public:
     QOpenGLExtensionsPrivate *d() const;
 
 private:
-    static bool isInitialized(const QOpenGLFunctionsPrivate *d) { return d != 0; }
+    static bool isInitialized(const QOpenGLFunctionsPrivate *d) { return d != nullptr; }
 };
 
 Q_DECLARE_OPERATORS_FOR_FLAGS(QOpenGLExtensions::OpenGLExtensions)

src/gui/opengl/qopenglframebufferobject_p.h

@@ -109,8 +109,8 @@ public:
 class QOpenGLFramebufferObjectPrivate
 {
 public:
-    QOpenGLFramebufferObjectPrivate() : fbo_guard(0), depth_buffer_guard(0)
-                                  , stencil_buffer_guard(0)
+    QOpenGLFramebufferObjectPrivate() : fbo_guard(nullptr), depth_buffer_guard(nullptr)
+                                  , stencil_buffer_guard(nullptr)
                                   , valid(false) {}
     ~QOpenGLFramebufferObjectPrivate() {}
 
@@ -135,9 +135,9 @@ public:
     QOpenGLExtensions funcs;
 
     struct ColorAttachment {
-        ColorAttachment() : internalFormat(0), guard(0) { }
+        ColorAttachment() : internalFormat(0), guard(nullptr) { }
         ColorAttachment(const QSize &size, GLenum internalFormat)
-            : size(size), internalFormat(internalFormat), guard(0) { }
+            : size(size), internalFormat(internalFormat), guard(nullptr) { }
         QSize size;
         GLenum internalFormat;
         QOpenGLSharedResourceGuard *guard;

src/gui/opengl/qopenglpaintengine_p.h

@@ -187,9 +187,9 @@ public:
 
     QOpenGL2PaintEngineExPrivate(QOpenGL2PaintEngineEx *q_ptr) :
             q(q_ptr),
-            shaderManager(0),
+            shaderManager(nullptr),
             width(0), height(0),
-            ctx(0),
+            ctx(nullptr),
             useSystemClip(true),
             elementIndicesVBOId(0),
             opacityArray(0),
@@ -361,9 +361,9 @@ void QOpenGL2PaintEngineExPrivate::uploadData(unsigned int arrayIndex, const GLf
             opacityBuffer.allocate(data, count * sizeof(float));
         }
         if (arrayIndex == QT_OPACITY_ATTR)
-            funcs.glVertexAttribPointer(arrayIndex, 1, GL_FLOAT, GL_FALSE, 0, 0);
+            funcs.glVertexAttribPointer(arrayIndex, 1, GL_FLOAT, GL_FALSE, 0, nullptr);
         else
-            funcs.glVertexAttribPointer(arrayIndex, 2, GL_FLOAT, GL_FALSE, 0, 0);
+            funcs.glVertexAttribPointer(arrayIndex, 2, GL_FLOAT, GL_FALSE, 0, nullptr);
     } else {
         // If we already uploaded the data we don't have to do it again
         if (data == vertexAttribPointers[arrayIndex])

src/gui/opengl/qopenglqueryhelper_p.h

@@ -65,18 +65,18 @@ class QOpenGLQueryHelper
 {
 public:
     QOpenGLQueryHelper(QOpenGLContext *context)
-        : GetQueryObjectuiv(0),
-          GetQueryObjectiv(0),
-          GetQueryiv(0),
-          EndQuery(0),
-          BeginQuery(0),
-          IsQuery(0),
-          DeleteQueries(0),
-          GenQueries(0),
-          GetInteger64v(0),
-          GetQueryObjectui64v(0),
-          GetQueryObjecti64v(0),
-          QueryCounter(0)
+        : GetQueryObjectuiv(nullptr),
+          GetQueryObjectiv(nullptr),
+          GetQueryiv(nullptr),
+          EndQuery(nullptr),
+          BeginQuery(nullptr),
+          IsQuery(nullptr),
+          DeleteQueries(nullptr),
+          GenQueries(nullptr),
+          GetInteger64v(nullptr),
+          GetQueryObjectui64v(nullptr),
+          GetQueryObjecti64v(nullptr),
+          QueryCounter(nullptr)
     {
         Q_ASSERT(context);
 

src/gui/opengl/qopengltextureglyphcache_p.h

@@ -139,7 +139,7 @@ public:
 
     inline void setPaintEnginePrivate(QOpenGL2PaintEngineExPrivate *p) { pex = p; }
 
-    inline const QOpenGLContextGroup *contextGroup() const { return m_textureResource ? m_textureResource->group() : 0; }
+    inline const QOpenGLContextGroup *contextGroup() const { return m_textureResource ? m_textureResource->group() : nullptr; }
 
     inline int serialNumber() const { return m_serialNumber; }
 

src/gui/opengl/qopengltexturehelper_p.h

@@ -167,7 +167,7 @@ public:
 
     inline void glTextureSubImage3D(GLuint texture, GLenum target, GLenum bindingTarget, GLint level, GLint xoffset, GLint yoffset, GLint zoffset,
                                     GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type,
-                                    const GLvoid *pixels, const QOpenGLPixelTransferOptions * const options = 0)
+                                    const GLvoid *pixels, const QOpenGLPixelTransferOptions * const options = nullptr)
     {
         if (options) {
             QOpenGLPixelTransferOptions oldOptions = savePixelUploadOptions();
@@ -181,7 +181,7 @@ public:
 
     inline void glTextureSubImage2D(GLuint texture, GLenum target, GLenum bindingTarget, GLint level, GLint xoffset, GLint yoffset,
                                     GLsizei width, GLsizei height, GLenum format, GLenum type,
-                                    const GLvoid *pixels, const QOpenGLPixelTransferOptions * const options = 0)
+                                    const GLvoid *pixels, const QOpenGLPixelTransferOptions * const options = nullptr)
     {
         if (options) {
             QOpenGLPixelTransferOptions oldOptions = savePixelUploadOptions();
@@ -195,7 +195,7 @@ public:
 
     inline void glTextureSubImage1D(GLuint texture, GLenum target, GLenum bindingTarget, GLint level, GLint xoffset,
                                     GLsizei width, GLenum format, GLenum type,
-                                    const GLvoid *pixels, const QOpenGLPixelTransferOptions * const options = 0)
+                                    const GLvoid *pixels, const QOpenGLPixelTransferOptions * const options = nullptr)
     {
         if (options) {
             QOpenGLPixelTransferOptions oldOptions = savePixelUploadOptions();
@@ -222,7 +222,7 @@ public:
     inline void glCompressedTextureSubImage1D(GLuint texture, GLenum target, GLenum bindingTarget, GLint level,
                                               GLint xoffset, GLsizei width,
                                               GLenum format, GLsizei imageSize, const GLvoid *bits,
-                                              const QOpenGLPixelTransferOptions * const options = 0)
+                                              const QOpenGLPixelTransferOptions * const options = nullptr)
     {
         if (options) {
             QOpenGLPixelTransferOptions oldOptions = savePixelUploadOptions();
@@ -238,7 +238,7 @@ public:
                                               GLint xoffset, GLint yoffset,
                                               GLsizei width, GLsizei height,
                                               GLenum format, GLsizei imageSize, const GLvoid *bits,
-                                              const QOpenGLPixelTransferOptions * const options = 0)
+                                              const QOpenGLPixelTransferOptions * const options = nullptr)
     {
         if (options) {
             QOpenGLPixelTransferOptions oldOptions = savePixelUploadOptions();
@@ -254,7 +254,7 @@ public:
                                               GLint xoffset, GLint yoffset, GLint zoffset,
                                               GLsizei width, GLsizei height, GLsizei depth,
                                               GLenum format, GLsizei imageSize, const GLvoid *bits,
-                                              const QOpenGLPixelTransferOptions * const options = 0)
+                                              const QOpenGLPixelTransferOptions * const options = nullptr)
     {
         if (options) {
             QOpenGLPixelTransferOptions oldOptions = savePixelUploadOptions();
@@ -269,7 +269,7 @@ public:
     inline void glCompressedTextureImage1D(GLuint texture, GLenum target, GLenum bindingTarget, GLint level,
                                            GLenum internalFormat, GLsizei width,
                                            GLint border, GLsizei imageSize, const GLvoid *bits,
-                                           const QOpenGLPixelTransferOptions * const options = 0)
+                                           const QOpenGLPixelTransferOptions * const options = nullptr)
     {
         if (options) {
             QOpenGLPixelTransferOptions oldOptions = savePixelUploadOptions();
@@ -284,7 +284,7 @@ public:
     inline void glCompressedTextureImage2D(GLuint texture, GLenum target, GLenum bindingTarget, GLint level,
                                            GLenum internalFormat, GLsizei width, GLsizei height,
                                            GLint border, GLsizei imageSize, const GLvoid *bits,
-                                           const QOpenGLPixelTransferOptions * const options = 0)
+                                           const QOpenGLPixelTransferOptions * const options = nullptr)
 
     {
         if (options) {
@@ -300,7 +300,7 @@ public:
     inline void glCompressedTextureImage3D(GLuint texture, GLenum target, GLenum bindingTarget, GLint level,
                                            GLenum internalFormat, GLsizei width, GLsizei height, GLsizei depth,
                                            GLint border, GLsizei imageSize, const GLvoid *bits,
-                                           const QOpenGLPixelTransferOptions * const options = 0)
+                                           const QOpenGLPixelTransferOptions * const options = nullptr)
     {
         if (options) {
             QOpenGLPixelTransferOptions oldOptions = savePixelUploadOptions();

src/gui/painting/qcosmeticstroker_p.h

@@ -98,8 +98,8 @@ public:
         : state(s),
           deviceRect(dr_unclipped),
           clip(dr),
-          pattern(0),
-          reversePattern(0),
+          pattern(nullptr),
+          reversePattern(nullptr),
           patternSize(0),
           patternLength(0),
           patternOffset(0),

src/gui/painting/qdatabuffer_p.h

@@ -69,7 +69,7 @@ public:
             buffer = (Type*) malloc(capacity * sizeof(Type));
             Q_CHECK_PTR(buffer);
         } else {
-            buffer = 0;
+            buffer = nullptr;
         }
         siz = 0;
     }
@@ -128,7 +128,7 @@ public:
             Q_CHECK_PTR(buffer);
         } else {
             free(buffer);
-            buffer = 0;
+            buffer = nullptr;
         }
     }
 

src/gui/painting/qdrawhelper_p.h

@@ -328,7 +328,7 @@ struct QTextureData
 
 struct QSpanData
 {
-    QSpanData() : tempImage(0) {}
+    QSpanData() : tempImage(nullptr) {}
     ~QSpanData() { delete tempImage; }
 
     QRasterBuffer *rasterBuffer;

src/gui/painting/qoutlinemapper_p.h

@@ -180,13 +180,13 @@ public:
     QT_FT_Outline *outline() {
         if (m_valid)
             return &m_outline;
-        return 0;
+        return nullptr;
     }
 
     QT_FT_Outline *convertPath(const QPainterPath &path);
     QT_FT_Outline *convertPath(const QVectorPath &path);
 
-    inline QPainterPath::ElementType *elementTypes() const { return m_element_types.size() == 0 ? 0 : m_element_types.data(); }
+    inline QPainterPath::ElementType *elementTypes() const { return m_element_types.size() == 0 ? nullptr : m_element_types.data(); }
 
 public:
     QDataBuffer<QPainterPath::ElementType> m_element_types;

src/gui/painting/qpaintengine_p.h

@@ -65,7 +65,7 @@ class Q_GUI_EXPORT QPaintEnginePrivate
 {
     Q_DECLARE_PUBLIC(QPaintEngine)
 public:
-    QPaintEnginePrivate() : pdev(0), q_ptr(0), currentClipDevice(0), hasSystemTransform(0),
+    QPaintEnginePrivate() : pdev(nullptr), q_ptr(nullptr), currentClipDevice(nullptr), hasSystemTransform(0),
                             hasSystemViewport(0) {}
     virtual ~QPaintEnginePrivate();
 
@@ -138,8 +138,8 @@ public:
 
     static QPaintEnginePrivate *get(QPaintEngine *paintEngine) { return paintEngine->d_func(); }
 
-    virtual QPaintEngine *aggregateEngine() { return 0; }
-    virtual Qt::HANDLE nativeHandle() { return 0; }
+    virtual QPaintEngine *aggregateEngine() { return nullptr; }
+    virtual Qt::HANDLE nativeHandle() { return nullptr; }
 };
 
 QT_END_NAMESPACE

src/gui/painting/qpaintengine_raster_p.h

@@ -426,7 +426,7 @@ inline void QClipData::appendSpans(const QSpan *s, int num)
 class QRasterBuffer
 {
 public:
-    QRasterBuffer() : m_width(0), m_height(0), m_buffer(0) { init(); }
+    QRasterBuffer() : m_width(0), m_height(0), m_buffer(nullptr) { init(); }
 
     ~QRasterBuffer();
 

src/gui/painting/qpainter_p.h

@@ -193,9 +193,9 @@ class QPainterPrivate
     Q_DECLARE_PUBLIC(QPainter)
 public:
     QPainterPrivate(QPainter *painter)
-    : q_ptr(painter), d_ptrs(0), state(0), dummyState(0), txinv(0), inDestructor(false), d_ptrs_size(0),
-        refcount(1), device(0), original_device(0), helper_device(0), engine(0), emulationEngine(0),
-        extended(0)
+    : q_ptr(painter), d_ptrs(nullptr), state(nullptr), dummyState(nullptr), txinv(0), inDestructor(false), d_ptrs_size(0),
+        refcount(1), device(nullptr), original_device(nullptr), helper_device(nullptr), engine(nullptr), emulationEngine(nullptr),
+        extended(nullptr)
     {
     }
 

src/gui/painting/qpainterpath_p.h

@@ -168,7 +168,7 @@ public:
         fillRule(Qt::OddEvenFill),
         dirtyBounds(false),
         dirtyControlBounds(false),
-        pathConverter(0)
+        pathConverter(nullptr)
     {
         require_moveTo = false;
         convex = false;
@@ -181,7 +181,7 @@ public:
         dirtyBounds(other.dirtyBounds),
         dirtyControlBounds(other.dirtyControlBounds),
         convex(other.convex),
-        pathConverter(0)
+        pathConverter(nullptr)
     {
         require_moveTo = false;
         elements = other.elements;

src/gui/painting/qpathclipper_p.h

@@ -82,7 +82,7 @@ public:
     bool intersect();
     bool contains();
 
-    static bool pathToRect(const QPainterPath &path, QRectF *rect = 0);
+    static bool pathToRect(const QPainterPath &path, QRectF *rect = nullptr);
     static QPainterPath intersect(const QPainterPath &path, const QRectF &rect);
 
 private:
@@ -394,7 +394,7 @@ inline const QPathSegments::Intersection *QPathSegments::intersectionAt(int inde
 {
     const int intersection = m_segments.at(index).intersection;
     if (intersection < 0)
-        return 0;
+        return nullptr;
     else
         return &m_intersections.at(intersection);
 }
@@ -428,12 +428,12 @@ inline int QWingedEdge::edgeCount() const
 
 inline QPathEdge *QWingedEdge::edge(int edge)
 {
-    return edge < 0 ? 0 : &m_edges.at(edge);
+    return edge < 0 ? nullptr : &m_edges.at(edge);
 }
 
 inline const QPathEdge *QWingedEdge::edge(int edge) const
 {
-    return edge < 0 ? 0 : &m_edges.at(edge);
+    return edge < 0 ? nullptr : &m_edges.at(edge);
 }
 
 inline int QWingedEdge::vertexCount() const
@@ -449,12 +449,12 @@ inline int QWingedEdge::addVertex(const QPointF &p)
 
 inline QPathVertex *QWingedEdge::vertex(int vertex)
 {
-    return vertex < 0 ? 0 : &m_vertices.at(vertex);
+    return vertex < 0 ? nullptr : &m_vertices.at(vertex);
 }
 
 inline const QPathVertex *QWingedEdge::vertex(int vertex) const
 {
-    return vertex < 0 ? 0 : &m_vertices.at(vertex);
+    return vertex < 0 ? nullptr : &m_vertices.at(vertex);
 }
 
 inline QPathEdge::Traversal QWingedEdge::flip(QPathEdge::Traversal traversal)

src/gui/painting/qplatformbackingstore.h

@@ -85,7 +85,7 @@ public:
     };
     Q_DECLARE_FLAGS(Flags, Flag)
 
-    explicit QPlatformTextureList(QObject *parent = 0);
+    explicit QPlatformTextureList(QObject *parent = nullptr);
     ~QPlatformTextureList();
 
     int count() const;
@@ -99,7 +99,7 @@ public:
     bool isLocked() const;
 
     void appendTexture(void *source, GLuint textureId, const QRect &geometry,
-                       const QRect &clipRect = QRect(), Flags flags = 0);
+                       const QRect &clipRect = QRect(), Flags flags = nullptr);
     void clear();
 
  Q_SIGNALS:

src/gui/painting/qrbtree_p.h

@@ -60,7 +60,7 @@ struct QRBTree
 {
     struct Node
     {
-        inline Node() : parent(0), left(0), right(0), red(true) { }
+        inline Node() : parent(nullptr), left(nullptr), right(nullptr), red(true) { }
         inline ~Node() {if (left) delete left; if (right) delete right;}
         T data;
         Node *parent;
@@ -69,7 +69,7 @@ struct QRBTree
         bool red;
     };
 
-    inline QRBTree() : root(0), freeList(0) { }
+    inline QRBTree() : root(nullptr), freeList(nullptr) { }
     inline ~QRBTree();
 
     inline void clear();
@@ -120,7 +120,7 @@ inline QRBTree<T>::~QRBTree()
     while (freeList) {
         // Avoid recursively calling the destructor, as this list may become large.
         Node *next = freeList->right;
-        freeList->right = 0;
+        freeList->right = nullptr;
         delete freeList;
         freeList = next;
     }
@@ -131,7 +131,7 @@ inline void QRBTree<T>::clear()
 {
     if (root)
         delete root;
-    root = 0;
+    root = nullptr;
 }
 
 template <class T>
@@ -359,7 +359,7 @@ void QRBTree<T>::detach(Node *node) // call this before removing a node.
     ref = child;
     if (child)
         child->parent = node->parent;
-    node->left = node->right = node->parent = 0;
+    node->left = node->right = node->parent = nullptr;
 }
 
 // 'node' must be black. rebalance will reduce the depth of black nodes by one in the sibling tree.
@@ -513,7 +513,7 @@ inline void QRBTree<T>::deleteNode(Node *&node)
     detach(node);
     node->right = freeList;
     freeList = node;
-    node = 0;
+    node = nullptr;
 }
 
 template <class T>
@@ -522,7 +522,7 @@ inline typename QRBTree<T>::Node *QRBTree<T>::newNode()
     if (freeList) {
         Node *node = freeList;
         freeList = freeList->right;
-        node->parent = node->left = node->right = 0;
+        node->parent = node->left = node->right = nullptr;
         node->red = true;
         return node;
     }

src/gui/painting/qtextureglyphcache_p.h

@@ -75,7 +75,7 @@ class Q_GUI_EXPORT QTextureGlyphCache : public QFontEngineGlyphCache
 {
 public:
     QTextureGlyphCache(QFontEngine::GlyphFormat format, const QTransform &matrix)
-        : QFontEngineGlyphCache(format, matrix), m_current_fontengine(0),
+        : QFontEngineGlyphCache(format, matrix), m_current_fontengine(nullptr),
                                                m_w(0), m_h(0), m_cx(0), m_cy(0), m_currentRowHeight(0)
         { }
 

src/gui/painting/qvectorpath_p.h

@@ -106,7 +106,7 @@ public:
     // ### Falcon: introduca a struct XY for points so lars is not so confused...
     QVectorPath(const qreal *points,
                 int count,
-                const QPainterPath::ElementType *elements = 0,
+                const QPainterPath::ElementType *elements = nullptr,
                 uint hints = ArbitraryShapeHint)
         : m_elements(elements),
           m_points(points),
@@ -128,12 +128,12 @@ public:
     inline bool hasExplicitOpen() const { return m_hints & ExplicitOpen; }
     inline bool hasWindingFill() const { return m_hints & WindingFill; }
 
-    inline void makeCacheable() const { m_hints |= ShouldUseCacheHint; m_cache = 0; }
+    inline void makeCacheable() const { m_hints |= ShouldUseCacheHint; m_cache = nullptr; }
     inline uint hints() const { return m_hints; }
 
     inline const QPainterPath::ElementType *elements() const { return m_elements; }
     inline const qreal *points() const { return m_points; }
-    inline bool isEmpty() const { return m_points == 0; }
+    inline bool isEmpty() const { return m_points == nullptr; }
 
     inline int elementCount() const { return m_count; }
     inline const QPainterPath convertToPainterPath() const;
@@ -165,7 +165,7 @@ public:
                 return e;
             e = e->next;
         }
-        return 0;
+        return nullptr;
     }
 
     template <typename T> static inline bool isRect(const T *pts, int elementCount) {

src/gui/text/qabstracttextdocumentlayout_p.h

@@ -59,7 +59,7 @@ QT_BEGIN_NAMESPACE
 
 struct QTextObjectHandler
 {
-    QTextObjectHandler() : iface(0) {}
+    QTextObjectHandler() : iface(nullptr) {}
     QTextObjectInterface *iface;
     QPointer<QObject> component;
 };
@@ -71,12 +71,12 @@ public:
     Q_DECLARE_PUBLIC(QAbstractTextDocumentLayout)
 
     inline QAbstractTextDocumentLayoutPrivate()
-        : paintDevice(0) {}
+        : paintDevice(nullptr) {}
     ~QAbstractTextDocumentLayoutPrivate();
 
     inline void setDocument(QTextDocument *doc) {
         document = doc;
-        docPrivate = 0;
+        docPrivate = nullptr;
         if (doc)
             docPrivate = doc->docHandle();
     }

src/gui/text/qcssparser_p.h

@@ -467,8 +467,8 @@ struct Q_GUI_EXPORT Declaration
     Attachment attachmentValue() const;
     int  styleFeaturesValue() const;
 
-    bool intValue(int *i, const char *unit = 0) const;
-    bool realValue(qreal *r, const char *unit = 0) const;
+    bool intValue(int *i, const char *unit = nullptr) const;
+    bool realValue(qreal *r, const char *unit = nullptr) const;
 
     QSize sizeValue() const;
     QRect rectValue() const;
@@ -584,7 +584,7 @@ struct Q_GUI_EXPORT Selector
 {
     QVector<BasicSelector> basicSelectors;
     int specificity() const;
-    quint64 pseudoClass(quint64 *negated = 0) const;
+    quint64 pseudoClass(quint64 *negated = nullptr) const;
     QString pseudoElement() const;
 };
 QT_CSS_DECLARE_TYPEINFO(Selector, Q_MOVABLE_TYPE)
@@ -656,7 +656,7 @@ public:
     };
 
     QVector<StyleRule> styleRulesForNode(NodePtr node);
-    QVector<Declaration> declarationsForNode(NodePtr node, const char *extraPseudo = 0);
+    QVector<Declaration> declarationsForNode(NodePtr node, const char *extraPseudo = nullptr);
 
     virtual bool nodeNameEquals(NodePtr node, const QString& nodeName) const;
     virtual QString attribute(NodePtr node, const QString &name) const = 0;
@@ -744,7 +744,7 @@ QT_CSS_DECLARE_TYPEINFO(Symbol, Q_MOVABLE_TYPE)
 class Q_GUI_EXPORT Scanner
 {
 public:
-    static QString preprocess(const QString &input, bool *hasEscapeSequences = 0);
+    static QString preprocess(const QString &input, bool *hasEscapeSequences = nullptr);
     static void scan(const QString &preprocessedInput, QVector<Symbol> *symbols);
 };
 
@@ -845,7 +845,7 @@ struct Q_GUI_EXPORT ValueExtractor
     bool extractGeometry(int *w, int *h, int *minw, int *minh, int *maxw, int *maxh);
     bool extractPosition(int *l, int *t, int *r, int *b, QCss::Origin *, Qt::Alignment *,
                          QCss::PositionMode *, Qt::Alignment *);
-    bool extractBox(int *margins, int *paddings, int *spacing = 0);
+    bool extractBox(int *margins, int *paddings, int *spacing = nullptr);
     bool extractBorder(int *borders, QBrush *colors, BorderStyle *Styles, QSize *radii);
     bool extractOutline(int *borders, QBrush *colors, BorderStyle *Styles, QSize *radii, int *offsets);
     bool extractPalette(QBrush *fg, QBrush *sfg, QBrush *sbg, QBrush *abg);

src/gui/text/qdistancefield_p.h

@@ -72,7 +72,7 @@ int Q_GUI_EXPORT QT_DISTANCEFIELD_HIGHGLYPHCOUNT();
 class Q_GUI_EXPORT QDistanceFieldData : public QSharedData
 {
 public:
-    QDistanceFieldData() : glyph(0), width(0), height(0), nbytes(0), data(0) {}
+    QDistanceFieldData() : glyph(0), width(0), height(0), nbytes(0), data(nullptr) {}
     QDistanceFieldData(const QDistanceFieldData &other);
     ~QDistanceFieldData();
 

src/gui/text/qfont_p.h

@@ -266,7 +266,7 @@ public:
 
     // QFontEngine cache
     struct Engine {
-        Engine() : data(0), timestamp(0), hits(0) { }
+        Engine() : data(nullptr), timestamp(0), hits(0) { }
         Engine(QFontEngine *d) : data(d), timestamp(0), hits(0) { }
 
         QFontEngine *data;

src/gui/text/qfontengine_p.h

@@ -194,7 +194,7 @@ public:
     virtual QImage *lockedAlphaMapForGlyph(glyph_t glyph, QFixed subPixelPosition,
                                            GlyphFormat neededFormat,
                                            const QTransform &t = QTransform(),
-                                           QPoint *offset = 0);
+                                           QPoint *offset = nullptr);
     virtual void unlockAlphaMapForGlyph();
     virtual bool hasInternalCaching() const { return false; }
 
@@ -224,7 +224,7 @@ public:
     virtual qreal minLeftBearing() const;
     virtual qreal minRightBearing() const;
 
-    virtual void getGlyphBearings(glyph_t glyph, qreal *leftBearing = 0, qreal *rightBearing = 0);
+    virtual void getGlyphBearings(glyph_t glyph, qreal *leftBearing = nullptr, qreal *rightBearing = nullptr);
 
     inline bool canRender(uint ucs4) const { return glyphIndex(ucs4) != 0; }
     virtual bool canRender(const QChar *str, int len) const;
@@ -234,7 +234,7 @@ public:
     virtual int glyphCount() const;
     virtual int glyphMargin(GlyphFormat format) { return format == Format_A32 ? 2 : 0; }
 
-    virtual QFontEngine *cloneWithSize(qreal /*pixelSize*/) const { return 0; }
+    virtual QFontEngine *cloneWithSize(qreal /*pixelSize*/) const { return nullptr; }
 
     virtual Qt::HANDLE handle() const;
 
@@ -458,7 +458,7 @@ public:
     virtual void recalcAdvances(QGlyphLayout *, ShaperFlags) const override;
     virtual void doKerning(QGlyphLayout *, ShaperFlags) const override;
     virtual void addOutlineToPath(qreal, qreal, const QGlyphLayout &, QPainterPath *, QTextItem::RenderFlags flags) override;
-    virtual void getGlyphBearings(glyph_t glyph, qreal *leftBearing = 0, qreal *rightBearing = 0) override;
+    virtual void getGlyphBearings(glyph_t glyph, qreal *leftBearing = nullptr, qreal *rightBearing = nullptr) override;
 
     virtual QFixed ascent() const override;
     virtual QFixed capHeight() const override;

src/gui/text/qfragmentmap_p.h

@@ -216,7 +216,7 @@ private:
 
 template <class Fragment>
 QFragmentMapData<Fragment>::QFragmentMapData()
-    : fragments(0)
+    : fragments(nullptr)
 {
     init();
 }

src/gui/text/qglyphrun_p.h

@@ -65,7 +65,7 @@ class QGlyphRunPrivate: public QSharedData
 {
 public:
     QGlyphRunPrivate()
-        : flags(0)
+        : flags(nullptr)
         , glyphIndexData(glyphIndexes.constData())
         , glyphIndexDataSize(0)
         , glyphPositionData(glyphPositions.constData())

src/gui/text/qrawfont_p.h

@@ -67,9 +67,9 @@ class Q_GUI_EXPORT QRawFontPrivate
 {
 public:
     QRawFontPrivate()
-        : fontEngine(0)
+        : fontEngine(nullptr)
         , hintingPreference(QFont::PreferDefaultHinting)
-        , thread(0)
+        , thread(nullptr)
     {}
 
     QRawFontPrivate(const QRawFontPrivate &other)
@@ -78,9 +78,9 @@ public:
         , thread(other.thread)
     {
 #ifndef QT_NO_DEBUG
-        Q_ASSERT(fontEngine == 0 || thread == QThread::currentThread());
+        Q_ASSERT(fontEngine == nullptr || thread == QThread::currentThread());
 #endif
-        if (fontEngine != 0)
+        if (fontEngine != nullptr)
             fontEngine->ref.ref();
     }
 
@@ -94,37 +94,37 @@ public:
 
     inline void cleanUp()
     {
-        setFontEngine(0);
+        setFontEngine(nullptr);
         hintingPreference = QFont::PreferDefaultHinting;
     }
 
     inline bool isValid() const
     {
 #ifndef QT_NO_DEBUG
-        Q_ASSERT(fontEngine == 0 || thread == QThread::currentThread());
+        Q_ASSERT(fontEngine == nullptr || thread == QThread::currentThread());
 #endif
-        return fontEngine != 0;
+        return fontEngine != nullptr;
     }
 
     inline void setFontEngine(QFontEngine *engine)
     {
 #ifndef QT_NO_DEBUG
-        Q_ASSERT(fontEngine == 0 || thread == QThread::currentThread());
+        Q_ASSERT(fontEngine == nullptr || thread == QThread::currentThread());
 #endif
         if (fontEngine == engine)
             return;
 
-        if (fontEngine != 0) {
+        if (fontEngine != nullptr) {
             if (!fontEngine->ref.deref())
                 delete fontEngine;
 #ifndef QT_NO_DEBUG
-            thread = 0;
+            thread = nullptr;
 #endif
         }
 
         fontEngine = engine;
 
-        if (fontEngine != 0) {
+        if (fontEngine != nullptr) {
             fontEngine->ref.ref();
 #ifndef QT_NO_DEBUG
             thread = QThread::currentThread();

src/gui/text/qstatictext_p.h

@@ -80,7 +80,7 @@ class Q_GUI_EXPORT QStaticTextItem
 public:
     QStaticTextItem() : useBackendOptimizations(false),
                         userDataNeedsUpdate(0), usesRawFont(0),
-                        m_fontEngine(0), m_userData(0) {}
+                        m_fontEngine(nullptr), m_userData(nullptr) {}
 
     void setUserData(QStaticTextUserData *newUserData)
     {

src/gui/text/qtextdocument_p.h

@@ -101,10 +101,10 @@ class QTextBlockData : public QFragment<3>
 {
 public:
     inline void initialize()
-        { layout = 0; userData = 0; userState = -1; revision = 0; hidden = 0; }
+        { layout = nullptr; userData = nullptr; userState = -1; revision = 0; hidden = 0; }
     void invalidate() const;
     inline void free()
-    { delete layout; layout = 0; delete userData; userData = 0; }
+    { delete layout; layout = nullptr; delete userData; userData = nullptr; }
 
     mutable int format;
     // ##### probably store a QTextEngine * here!

src/gui/text/qtextdocumentfragment_p.h

@@ -125,7 +125,7 @@ public:
 
     QTextHtmlImporter(QTextDocument *_doc, const QString &html,
                       ImportMode mode,
-                      const QTextDocument *resourceProvider = 0);
+                      const QTextDocument *resourceProvider = nullptr);
 
     void import();
 
@@ -163,7 +163,7 @@ private:
 #endif
     struct TableCellIterator
     {
-        inline TableCellIterator(QTextTable *t = 0) : table(t), row(0), column(0) {}
+        inline TableCellIterator(QTextTable *t = nullptr) : table(t), row(0), column(0) {}
 
         inline TableCellIterator &operator++() {
             if (atEnd())
@@ -182,7 +182,7 @@ private:
             return *this;
         }
 
-        inline bool atEnd() const { return table == 0 || row >= table->rows(); }
+        inline bool atEnd() const { return table == nullptr || row >= table->rows(); }
 
         QTextTableCell cell() const { return table->cellAt(row, column); }
 

src/gui/text/qtextengine_p.h

@@ -304,8 +304,8 @@ class QTextItemInt : public QTextItem
 {
 public:
     inline QTextItemInt()
-        : justified(false), underlineStyle(QTextCharFormat::NoUnderline), num_chars(0), chars(0),
-          logClusters(0), f(0), fontEngine(0)
+        : justified(false), underlineStyle(QTextCharFormat::NoUnderline), num_chars(0), chars(nullptr),
+          logClusters(nullptr), f(nullptr), fontEngine(nullptr)
     {}
     QTextItemInt(const QScriptItem &si, QFont *font, const QTextCharFormat &format = QTextCharFormat());
     QTextItemInt(const QGlyphLayout &g, QFont *font, const QChar *chars, int numChars, QFontEngine *fe,
@@ -484,7 +484,7 @@ public:
         return end - si->position;
     }
 
-    QFontEngine *fontEngine(const QScriptItem &si, QFixed *ascent = 0, QFixed *descent = 0, QFixed *leading = 0) const;
+    QFontEngine *fontEngine(const QScriptItem &si, QFixed *ascent = nullptr, QFixed *descent = nullptr, QFixed *leading = nullptr) const;
     QFont font(const QScriptItem &si) const;
     inline QFont font() const { return fnt; }
 
@@ -530,7 +530,7 @@ public:
     inline QTextFormatCollection *formatCollection() const {
         if (block.docHandle())
             return block.docHandle()->formatCollection();
-        return specialData ? specialData->formatCollection.data() : 0;
+        return specialData ? specialData->formatCollection.data() : nullptr;
     }
     QTextCharFormat format(const QScriptItem *si) const;
     inline QAbstractTextDocumentLayout *docLayout() const {
@@ -553,8 +553,8 @@ private:
         mutable int prevPosition;
         mutable int prevLength;
         inline void reset() {
-            prevFontEngine = 0;
-            prevScaledFontEngine = 0;
+            prevFontEngine = nullptr;
+            prevScaledFontEngine = nullptr;
             prevScript = -1;
             prevPosition = -1;
             prevLength = -1;
@@ -684,7 +684,7 @@ Q_DECLARE_TYPEINFO(QTextEngine::ItemDecoration, Q_MOVABLE_TYPE);
 struct QTextLineItemIterator
 {
     QTextLineItemIterator(QTextEngine *eng, int lineNum, const QPointF &pos = QPointF(),
-                          const QTextLayout::FormatRange *_selection = 0);
+                          const QTextLayout::FormatRange *_selection = nullptr);
 
     inline bool atEnd() const { return logicalItem >= nItems - 1; }
     inline bool atBeginning() const { return logicalItem <= 0; }

src/gui/text/qtextimagehandler_p.h

@@ -65,7 +65,7 @@ class Q_GUI_EXPORT QTextImageHandler : public QObject,
     Q_OBJECT
     Q_INTERFACES(QTextObjectInterface)
 public:
-    explicit QTextImageHandler(QObject *parent = 0);
+    explicit QTextImageHandler(QObject *parent = nullptr);
 
     virtual QSizeF intrinsicSize(QTextDocument *doc, int posInDocument, const QTextFormat &format) override;
     virtual void drawObject(QPainter *p, const QRectF &rect, QTextDocument *doc, int posInDocument, const QTextFormat &format) override;

src/gui/text/qtextobject_p.h

@@ -93,7 +93,7 @@ class QTextFramePrivate : public QTextObjectPrivate
     Q_DECLARE_PUBLIC(QTextFrame)
 public:
     QTextFramePrivate(QTextDocument *doc)
-        : QTextObjectPrivate(doc), fragment_start(0), fragment_end(0), parentFrame(0), layoutData(0)
+        : QTextObjectPrivate(doc), fragment_start(0), fragment_end(0), parentFrame(nullptr), layoutData(nullptr)
     {
     }
     virtual void fragmentAdded(QChar type, uint fragment);