Deprecate constructing QFlags from a pointer

This was used to support QFlags f = 0 initialization, but with 0 used
as a pointer literal now considered bad form, it had been changed many
places to QFlags f = nullptr, which is meaningless and confusing.

Change-Id: I4bc592151c255dc5cab1a232615caecc520f02e8
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

25 files changed, 37 insertions, 38 deletions

diff --git a/src/widgets/widgets/qabstractbutton.cpp b/src/widgets/widgets/qabstractbutton.cpp
index d956d2ba23..19528d61d2 100644
--- a/src/widgets/widgets/qabstractbutton.cpp
+++ b/src/widgets/widgets/qabstractbutton.cpp
@@ -468,7 +468,7 @@ void QAbstractButtonPrivate::emitToggled(bool checked)
     Constructs an abstract button with a \a parent.
 */
 QAbstractButton::QAbstractButton(QWidget *parent)
-    : QWidget(*new QAbstractButtonPrivate, parent, 0)
+    : QWidget(*new QAbstractButtonPrivate, parent, { })
 {
     Q_D(QAbstractButton);
     d->init();
@@ -490,7 +490,7 @@ QAbstractButton::QAbstractButton(QWidget *parent)
 /*! \internal
  */
 QAbstractButton::QAbstractButton(QAbstractButtonPrivate &dd, QWidget *parent)
-    : QWidget(dd, parent, 0)
+    : QWidget(dd, parent, { })
 {
     Q_D(QAbstractButton);
     d->init();
diff --git a/src/widgets/widgets/qabstractslider.cpp b/src/widgets/widgets/qabstractslider.cpp
index dc325ab871..a0611565b8 100644
--- a/src/widgets/widgets/qabstractslider.cpp
+++ b/src/widgets/widgets/qabstractslider.cpp
@@ -273,13 +273,13 @@ void QAbstractSliderPrivate::setSteps(int single, int page)
     \l value of 0.
 */
 QAbstractSlider::QAbstractSlider(QWidget *parent)
-    :QWidget(*new QAbstractSliderPrivate, parent, 0)
+    :QWidget(*new QAbstractSliderPrivate, parent, { })
 {
 }
 
 /*! \internal */
 QAbstractSlider::QAbstractSlider(QAbstractSliderPrivate &dd, QWidget *parent)
-    :QWidget(dd, parent, 0)
+    :QWidget(dd, parent, { })
 {
 }
 
diff --git a/src/widgets/widgets/qabstractspinbox.cpp b/src/widgets/widgets/qabstractspinbox.cpp
index fc19e0793e..b1e1c9bc1b 100644
--- a/src/widgets/widgets/qabstractspinbox.cpp
+++ b/src/widgets/widgets/qabstractspinbox.cpp
@@ -147,7 +147,7 @@ QT_BEGIN_NAMESPACE
 */
 
 QAbstractSpinBox::QAbstractSpinBox(QWidget *parent)
-    : QWidget(*new QAbstractSpinBoxPrivate, parent, 0)
+    : QWidget(*new QAbstractSpinBoxPrivate, parent, { })
 {
     Q_D(QAbstractSpinBox);
     d->init();
@@ -157,7 +157,7 @@ QAbstractSpinBox::QAbstractSpinBox(QWidget *parent)
     \internal
 */
 QAbstractSpinBox::QAbstractSpinBox(QAbstractSpinBoxPrivate &dd, QWidget *parent)
-    : QWidget(dd, parent, 0)
+    : QWidget(dd, parent, { })
 {
     Q_D(QAbstractSpinBox);
     d->init();
diff --git a/src/widgets/widgets/qcalendarwidget.cpp b/src/widgets/widgets/qcalendarwidget.cpp
index 8593001f8b..749ae96df2 100644
--- a/src/widgets/widgets/qcalendarwidget.cpp
+++ b/src/widgets/widgets/qcalendarwidget.cpp
@@ -1207,9 +1207,9 @@ Qt::ItemFlags QCalendarModel::flags(const QModelIndex &index) const
     if (!date.isValid())
         return QAbstractTableModel::flags(index);
     if (date < m_minimumDate)
-        return 0;
+        return { };
     if (date > m_maximumDate)
-        return 0;
+        return { };
     return QAbstractTableModel::flags(index);
 }
 
@@ -2135,7 +2135,7 @@ void QCalendarWidgetPrivate::_q_editingFinished()
     \sa setCurrentPage()
 */
 QCalendarWidget::QCalendarWidget(QWidget *parent)
-    : QWidget(*new QCalendarWidgetPrivate, parent, 0)
+    : QWidget(*new QCalendarWidgetPrivate, parent, { })
 {
     Q_D(QCalendarWidget);
 
diff --git a/src/widgets/widgets/qcombobox.cpp b/src/widgets/widgets/qcombobox.cpp
index 2d21187317..03dcde0a58 100644
--- a/src/widgets/widgets/qcombobox.cpp
+++ b/src/widgets/widgets/qcombobox.cpp
@@ -931,7 +931,7 @@ QStyleOptionComboBox QComboBoxPrivateContainer::comboStyleOption() const
     model QStandardItemModel.
 */
 QComboBox::QComboBox(QWidget *parent)
-    : QWidget(*new QComboBoxPrivate(), parent, 0)
+    : QWidget(*new QComboBoxPrivate(), parent, { })
 {
     Q_D(QComboBox);
     d->init();
@@ -941,7 +941,7 @@ QComboBox::QComboBox(QWidget *parent)
   \internal
 */
 QComboBox::QComboBox(QComboBoxPrivate &dd, QWidget *parent)
-    : QWidget(dd, parent, 0)
+    : QWidget(dd, parent, { })
 {
     Q_D(QComboBox);
     d->init();
diff --git a/src/widgets/widgets/qdatetimeedit.cpp b/src/widgets/widgets/qdatetimeedit.cpp
index e26993fb23..f7763ce27b 100644
--- a/src/widgets/widgets/qdatetimeedit.cpp
+++ b/src/widgets/widgets/qdatetimeedit.cpp
@@ -1421,7 +1421,7 @@ QDateTimeEdit::StepEnabled QDateTimeEdit::stepEnabled() const
         return (d->minimum == d->maximum ? StepEnabled(0) : StepEnabled(StepUpEnabled));
     }
 
-    QAbstractSpinBox::StepEnabled ret = 0;
+    QAbstractSpinBox::StepEnabled ret = { };
 
 #ifdef QT_KEYPAD_NAVIGATION
     if (QApplicationPrivate::keypadNavigationEnabled() && !hasEditFocus()) {
@@ -1456,7 +1456,7 @@ QDateTimeEdit::StepEnabled QDateTimeEdit::stepEnabled() const
     switch (d->sectionType(d->currentSectionIndex)) {
     case QDateTimeParser::NoSection:
     case QDateTimeParser::FirstSection:
-    case QDateTimeParser::LastSection: return 0;
+    case QDateTimeParser::LastSection: return { };
     default: break;
     }
     if (d->wrapping)
@@ -1659,12 +1659,11 @@ QDateTimeEditPrivate::QDateTimeEditPrivate()
     cacheGuard = false;
     fixday = true;
     type = QVariant::DateTime;
-    sections = 0;
+    sections = { };
     cachedDay = -1;
     currentSectionIndex = FirstSectionIndex;
 
     first.pos = 0;
-    sections = 0;
     calendarPopup = false;
     minimum = QDATETIMEEDIT_COMPAT_DATE_MIN.startOfDay();
     maximum = QDATETIMEEDIT_DATE_MAX.endOfDay();
@@ -2256,7 +2255,7 @@ QDateTimeEdit::Section QDateTimeEditPrivate::convertToPublic(QDateTimeParser::Se
 
 QDateTimeEdit::Sections QDateTimeEditPrivate::convertSections(QDateTimeParser::Sections s)
 {
-    QDateTimeEdit::Sections ret = 0;
+    QDateTimeEdit::Sections ret;
     if (s & QDateTimeParser::MSecSection)
         ret |= QDateTimeEdit::MSecSection;
     if (s & QDateTimeParser::SecondSection)
diff --git a/src/widgets/widgets/qdialogbuttonbox.cpp b/src/widgets/widgets/qdialogbuttonbox.cpp
index 28f6cdc7bd..9096ee82f6 100644
--- a/src/widgets/widgets/qdialogbuttonbox.cpp
+++ b/src/widgets/widgets/qdialogbuttonbox.cpp
@@ -482,7 +482,7 @@ QDialogButtonBox::QDialogButtonBox(QWidget *parent)
     \sa orientation, addButton()
 */
 QDialogButtonBox::QDialogButtonBox(Qt::Orientation orientation, QWidget *parent)
-    : QWidget(*new QDialogButtonBoxPrivate(orientation), parent, 0)
+    : QWidget(*new QDialogButtonBoxPrivate(orientation), parent, { })
 {
     d_func()->initLayout();
 }
diff --git a/src/widgets/widgets/qdockwidget.cpp b/src/widgets/widgets/qdockwidget.cpp
index 05ec3aface..687ef8ba29 100644
--- a/src/widgets/widgets/qdockwidget.cpp
+++ b/src/widgets/widgets/qdockwidget.cpp
@@ -238,8 +238,8 @@ void QDockWidgetTitleButton::paintEvent(QPaintEvent *)
     }
 
     opt.icon = icon();
-    opt.subControls = 0;
-    opt.activeSubControls = 0;
+    opt.subControls = { };
+    opt.activeSubControls = { };
     opt.features = QStyleOptionToolButton::None;
     opt.arrowType = Qt::NoArrow;
     opt.iconSize = dockButtonIconSize();
diff --git a/src/widgets/widgets/qeffects.cpp b/src/widgets/widgets/qeffects.cpp
index 7069ef0368..e69366d7c8 100644
--- a/src/widgets/widgets/qeffects.cpp
+++ b/src/widgets/widgets/qeffects.cpp
@@ -65,7 +65,7 @@ class QAlphaWidget: public QWidget, private QEffects
 {
     Q_OBJECT
 public:
-    QAlphaWidget(QWidget* w, Qt::WindowFlags f = 0);
+    QAlphaWidget(QWidget* w, Qt::WindowFlags f = { });
     ~QAlphaWidget();
 
     void run(int time);
diff --git a/src/widgets/widgets/qfocusframe.cpp b/src/widgets/widgets/qfocusframe.cpp
index 0992becdf0..ee24e92c7e 100644
--- a/src/widgets/widgets/qfocusframe.cpp
+++ b/src/widgets/widgets/qfocusframe.cpp
@@ -154,7 +154,7 @@ void QFocusFrame::initStyleOption(QStyleOption *option) const
 */
 
 QFocusFrame::QFocusFrame(QWidget *parent)
-    : QWidget(*new QFocusFramePrivate, parent, 0)
+    : QWidget(*new QFocusFramePrivate, parent, { })
 {
     setAttribute(Qt::WA_TransparentForMouseEvents);
     setFocusPolicy(Qt::NoFocus);
diff --git a/src/widgets/widgets/qgroupbox.cpp b/src/widgets/widgets/qgroupbox.cpp
index eec794562a..f7fe072302 100644
--- a/src/widgets/widgets/qgroupbox.cpp
+++ b/src/widgets/widgets/qgroupbox.cpp
@@ -178,7 +178,7 @@ void QGroupBoxPrivate::click()
 */
 
 QGroupBox::QGroupBox(QWidget *parent)
-    : QWidget(*new QGroupBoxPrivate, parent, 0)
+    : QWidget(*new QGroupBoxPrivate, parent, { })
 {
     Q_D(QGroupBox);
     d->init();
diff --git a/src/widgets/widgets/qkeysequenceedit.cpp b/src/widgets/widgets/qkeysequenceedit.cpp
index 6f2a6b2d5a..b63b0b4d72 100644
--- a/src/widgets/widgets/qkeysequenceedit.cpp
+++ b/src/widgets/widgets/qkeysequenceedit.cpp
@@ -131,7 +131,7 @@ void QKeySequenceEditPrivate::finishEditing()
     Constructs a QKeySequenceEdit widget with the given \a parent.
 */
 QKeySequenceEdit::QKeySequenceEdit(QWidget *parent)
-    : QKeySequenceEdit(*new QKeySequenceEditPrivate, parent, 0)
+    : QKeySequenceEdit(*new QKeySequenceEditPrivate, parent, { })
 {
 }
 
diff --git a/src/widgets/widgets/qlineedit.cpp b/src/widgets/widgets/qlineedit.cpp
index fb67936768..92f43a309d 100644
--- a/src/widgets/widgets/qlineedit.cpp
+++ b/src/widgets/widgets/qlineedit.cpp
@@ -274,7 +274,7 @@ QLineEdit::QLineEdit(QWidget* parent)
     \sa text(), setMaxLength()
 */
 QLineEdit::QLineEdit(const QString& contents, QWidget* parent)
-    : QWidget(*new QLineEditPrivate, parent, 0)
+    : QWidget(*new QLineEditPrivate, parent, { })
 {
     Q_D(QLineEdit);
     d->init(contents);
diff --git a/src/widgets/widgets/qmainwindowlayout_p.h b/src/widgets/widgets/qmainwindowlayout_p.h
index 967b713096..ebed47da30 100644
--- a/src/widgets/widgets/qmainwindowlayout_p.h
+++ b/src/widgets/widgets/qmainwindowlayout_p.h
@@ -334,7 +334,7 @@ class QDockWidgetGroupWindow : public QWidget
 {
     Q_OBJECT
 public:
-    explicit QDockWidgetGroupWindow(QWidget* parent = nullptr, Qt::WindowFlags f = nullptr)
+    explicit QDockWidgetGroupWindow(QWidget* parent = nullptr, Qt::WindowFlags f = { })
         : QWidget(parent, f) {}
     QDockAreaLayoutInfo *layoutInfo() const;
 #if QT_CONFIG(tabbar)
diff --git a/src/widgets/widgets/qmdisubwindow.cpp b/src/widgets/widgets/qmdisubwindow.cpp
index d58a1d06db..a0286dfcb1 100644
--- a/src/widgets/widgets/qmdisubwindow.cpp
+++ b/src/widgets/widgets/qmdisubwindow.cpp
@@ -2212,7 +2212,7 @@ void QMdiSubWindowPrivate::updateInternalWindowTitle()
     \sa QMdiArea::addSubWindow()
 */
 QMdiSubWindow::QMdiSubWindow(QWidget *parent, Qt::WindowFlags flags)
-    : QWidget(*new QMdiSubWindowPrivate, parent, 0)
+    : QWidget(*new QMdiSubWindowPrivate, parent, { })
 {
     Q_D(QMdiSubWindow);
 #if QT_CONFIG(menu)
diff --git a/src/widgets/widgets/qmenubar.cpp b/src/widgets/widgets/qmenubar.cpp
index 69b1c5896f..afa5ca7142 100644
--- a/src/widgets/widgets/qmenubar.cpp
+++ b/src/widgets/widgets/qmenubar.cpp
@@ -735,7 +735,7 @@ QAction *QMenuBarPrivate::getNextAction(const int _start, const int increment) c
 /*!
     Constructs a menu bar with parent \a parent.
 */
-QMenuBar::QMenuBar(QWidget *parent) : QWidget(*new QMenuBarPrivate, parent, 0)
+QMenuBar::QMenuBar(QWidget *parent) : QWidget(*new QMenuBarPrivate, parent, { })
 {
     Q_D(QMenuBar);
     d->init();
diff --git a/src/widgets/widgets/qprogressbar.cpp b/src/widgets/widgets/qprogressbar.cpp
index 56253b8e44..04241fda09 100644
--- a/src/widgets/widgets/qprogressbar.cpp
+++ b/src/widgets/widgets/qprogressbar.cpp
@@ -234,7 +234,7 @@ bool QProgressBarPrivate::repaintRequired() const
 */
 
 QProgressBar::QProgressBar(QWidget *parent)
-    : QWidget(*(new QProgressBarPrivate), parent, 0)
+    : QWidget(*(new QProgressBarPrivate), parent, { })
 {
     d_func()->init();
 }
diff --git a/src/widgets/widgets/qscrollarea_p.h b/src/widgets/widgets/qscrollarea_p.h
index 2bdf9ed596..26335285a4 100644
--- a/src/widgets/widgets/qscrollarea_p.h
+++ b/src/widgets/widgets/qscrollarea_p.h
@@ -65,7 +65,7 @@ class QScrollAreaPrivate: public QAbstractScrollAreaPrivate
     Q_DECLARE_PUBLIC(QScrollArea)
 
 public:
-    QScrollAreaPrivate(): resizable(false), alignment(nullptr){}
+    QScrollAreaPrivate(): resizable(false) {}
     void updateScrollBars();
     void updateWidgetPosition();
     QPointer<QWidget> widget;
diff --git a/src/widgets/widgets/qsizegrip.cpp b/src/widgets/widgets/qsizegrip.cpp
index 835af9c7b8..662d4c9e92 100644
--- a/src/widgets/widgets/qsizegrip.cpp
+++ b/src/widgets/widgets/qsizegrip.cpp
@@ -195,7 +195,7 @@ Qt::Corner QSizeGripPrivate::corner() const
     parent.
 */
 QSizeGrip::QSizeGrip(QWidget * parent)
-    : QWidget(*new QSizeGripPrivate, parent, 0)
+    : QWidget(*new QSizeGripPrivate, parent, { })
 {
     Q_D(QSizeGrip);
     d->init();
diff --git a/src/widgets/widgets/qsplitter.cpp b/src/widgets/widgets/qsplitter.cpp
index e7a4889996..1a5fb7f251 100644
--- a/src/widgets/widgets/qsplitter.cpp
+++ b/src/widgets/widgets/qsplitter.cpp
@@ -119,7 +119,7 @@ QSplitterPrivate::~QSplitterPrivate()
     \a parent.
 */
 QSplitterHandle::QSplitterHandle(Qt::Orientation orientation, QSplitter *parent)
-    : QWidget(*new QSplitterHandlePrivate, parent, 0)
+    : QWidget(*new QSplitterHandlePrivate, parent, { })
 {
     Q_D(QSplitterHandle);
     d->s = parent;
diff --git a/src/widgets/widgets/qstatusbar.cpp b/src/widgets/widgets/qstatusbar.cpp
index 39f0f11daf..943b576ee3 100644
--- a/src/widgets/widgets/qstatusbar.cpp
+++ b/src/widgets/widgets/qstatusbar.cpp
@@ -226,7 +226,7 @@ QRect QStatusBarPrivate::messageRect() const
     \sa setSizeGripEnabled()
 */
 QStatusBar::QStatusBar(QWidget * parent)
-    : QWidget(*new QStatusBarPrivate, parent, 0)
+    : QWidget(*new QStatusBarPrivate, parent, { })
 {
     Q_D(QStatusBar);
     d->box = 0;
diff --git a/src/widgets/widgets/qtabbar.cpp b/src/widgets/widgets/qtabbar.cpp
index 7e1794efef..dfe362bdca 100644
--- a/src/widgets/widgets/qtabbar.cpp
+++ b/src/widgets/widgets/qtabbar.cpp
@@ -859,7 +859,7 @@ void QTabBarPrivate::refresh()
     Creates a new tab bar with the given \a parent.
 */
 QTabBar::QTabBar(QWidget* parent)
-    :QWidget(*new QTabBarPrivate, parent, 0)
+    :QWidget(*new QTabBarPrivate, parent, { })
 {
     Q_D(QTabBar);
     d->init();
diff --git a/src/widgets/widgets/qtabwidget.cpp b/src/widgets/widgets/qtabwidget.cpp
index 4d7b39ae01..2b3b8280bb 100644
--- a/src/widgets/widgets/qtabwidget.cpp
+++ b/src/widgets/widgets/qtabwidget.cpp
@@ -359,7 +359,7 @@ void QTabWidget::initStyleOption(QStyleOptionTabWidgetFrame *option) const
     Constructs a tabbed widget with parent \a parent.
 */
 QTabWidget::QTabWidget(QWidget *parent)
-    : QWidget(*new QTabWidgetPrivate, parent, 0)
+    : QWidget(*new QTabWidgetPrivate, parent, { })
 {
     Q_D(QTabWidget);
     d->init();
diff --git a/src/widgets/widgets/qtoolbar.cpp b/src/widgets/widgets/qtoolbar.cpp
index 58e9c4fd87..79182dfa33 100644
--- a/src/widgets/widgets/qtoolbar.cpp
+++ b/src/widgets/widgets/qtoolbar.cpp
@@ -503,7 +503,7 @@ void QToolBarPrivate::plug(const QRect &r)
     Constructs a QToolBar with the given \a parent.
 */
 QToolBar::QToolBar(QWidget *parent)
-    : QWidget(*new QToolBarPrivate, parent, 0)
+    : QWidget(*new QToolBarPrivate, parent, { })
 {
     Q_D(QToolBar);
     d->init();
diff --git a/src/widgets/widgets/qwidgettextcontrol_p.h b/src/widgets/widgets/qwidgettextcontrol_p.h
index 59bf5466e6..1f06aa0b97 100644
--- a/src/widgets/widgets/qwidgettextcontrol_p.h
+++ b/src/widgets/widgets/qwidgettextcontrol_p.h
@@ -116,12 +116,12 @@ public:
     void setCurrentCharFormat(const QTextCharFormat &format);
     QTextCharFormat currentCharFormat() const;
 
-    bool find(const QString &exp, QTextDocument::FindFlags options = nullptr);
+    bool find(const QString &exp, QTextDocument::FindFlags options = { });
 #ifndef QT_NO_REGEXP
-    bool find(const QRegExp &exp, QTextDocument::FindFlags options = nullptr);
+    bool find(const QRegExp &exp, QTextDocument::FindFlags options = { });
 #endif
 #if QT_CONFIG(regularexpression)
-    bool find(const QRegularExpression &exp, QTextDocument::FindFlags options = nullptr);
+    bool find(const QRegularExpression &exp, QTextDocument::FindFlags options = { });
 #endif
 
     QString toPlainText() const;