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>

9 files changed, 24 insertions, 24 deletions

diff --git a/src/corelib/kernel/qcore_unix_p.h b/src/corelib/kernel/qcore_unix_p.h
index 5a2a29a327..32ef6408c2 100644
--- a/src/corelib/kernel/qcore_unix_p.h
+++ b/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);
     }
 }
diff --git a/src/corelib/kernel/qcoreapplication_p.h b/src/corelib/kernel/qcoreapplication_p.h
index b3479414ab..14ca3efd7f 100644
--- a/src/corelib/kernel/qcoreapplication_p.h
+++ b/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();
diff --git a/src/corelib/kernel/qeventdispatcher_glib_p.h b/src/corelib/kernel/qeventdispatcher_glib_p.h
index 88ff316ee5..313825d0a7 100644
--- a/src/corelib/kernel/qeventdispatcher_glib_p.h
+++ b/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;
diff --git a/src/corelib/kernel/qeventdispatcher_unix_p.h b/src/corelib/kernel/qeventdispatcher_unix_p.h
index 0fd068b074..8cfa4bbdf7 100644
--- a/src/corelib/kernel/qeventdispatcher_unix_p.h
+++ b/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
diff --git a/src/corelib/kernel/qmetaobject_moc_p.h b/src/corelib/kernel/qmetaobject_moc_p.h
index ad258acfcd..8c7900767b 100644
--- a/src/corelib/kernel/qmetaobject_moc_p.h
+++ b/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;
diff --git a/src/corelib/kernel/qmetaobject_p.h b/src/corelib/kernel/qmetaobject_p.h
index 5b412b5140..26d86fdf14 100644
--- a/src/corelib/kernel/qmetaobject_p.h
+++ b/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,
diff --git a/src/corelib/kernel/qmetaobjectbuilder_p.h b/src/corelib/kernel/qmetaobjectbuilder_p.h
index 6100835bad..6d43be7811 100644
--- a/src/corelib/kernel/qmetaobjectbuilder_p.h
+++ b/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; }
 
diff --git a/src/corelib/kernel/qsharedmemory_p.h b/src/corelib/kernel/qsharedmemory_p.h
index 95fe0d1083..59802eb6ce 100644
--- a/src/corelib/kernel/qsharedmemory_p.h
+++ b/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;
     }
 
diff --git a/src/corelib/kernel/qvariant_p.h b/src/corelib/kernel/qvariant_p.h
index b22b7c231e..3d87beac83 100644
--- a/src/corelib/kernel/qvariant_p.h
+++ b/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));