use nullptr consistently (clang-tidy)

From now on we prefer nullptr instead of 0 to clarify cases where
we are assigning or testing a pointer rather than a numeric zero.

Also, replaced cases where 0 was passed as Qt::KeyboardModifiers
with Qt::NoModifier (clang-tidy replaced them with nullptr, which
waas wrong, so it was just as well to make the tests more readable
rather than to revert those lines).

Change-Id: I4735d35e4d9f42db5216862ce091429eadc6e65d
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

14 files changed, 15 insertions, 15 deletions

diff --git a/examples/qml/qmlextensionplugins/plugin.cpp b/examples/qml/qmlextensionplugins/plugin.cpp
index c00c7bc015..3ef7f04f95 100644
--- a/examples/qml/qmlextensionplugins/plugin.cpp
+++ b/examples/qml/qmlextensionplugins/plugin.cpp
@@ -115,7 +115,7 @@ class TimeModel : public QObject
 //![0]
 
 public:
-    TimeModel(QObject *parent=0) : QObject(parent)
+    TimeModel(QObject *parent=nullptr) : QObject(parent)
     {
         if (++instances == 1) {
             if (!timer)
@@ -145,7 +145,7 @@ private:
 };
 
 int TimeModel::instances=0;
-MinuteTimer *TimeModel::timer=0;
+MinuteTimer *TimeModel::timer=nullptr;
 
 //![plugin]
 class QExampleQmlPlugin : public QQmlExtensionPlugin
diff --git a/examples/qml/referenceexamples/attached/birthdayparty.cpp b/examples/qml/referenceexamples/attached/birthdayparty.cpp
index 2594fea641..26aa56e86c 100644
--- a/examples/qml/referenceexamples/attached/birthdayparty.cpp
+++ b/examples/qml/referenceexamples/attached/birthdayparty.cpp
@@ -65,7 +65,7 @@ void BirthdayPartyAttached::setRsvp(const QDate &d)
 }
 
 BirthdayParty::BirthdayParty(QObject *parent)
-: QObject(parent), m_host(0)
+: QObject(parent), m_host(nullptr)
 {
 }
 
diff --git a/examples/qml/referenceexamples/binding/birthdayparty.cpp b/examples/qml/referenceexamples/binding/birthdayparty.cpp
index d30674a92d..866c1f6968 100644
--- a/examples/qml/referenceexamples/binding/birthdayparty.cpp
+++ b/examples/qml/referenceexamples/binding/birthdayparty.cpp
@@ -69,7 +69,7 @@ void BirthdayPartyAttached::setRsvp(const QDate &d)
 
 
 BirthdayParty::BirthdayParty(QObject *parent)
-: QObject(parent), m_host(0)
+: QObject(parent), m_host(nullptr)
 {
 }
 
diff --git a/examples/qml/referenceexamples/coercion/birthdayparty.cpp b/examples/qml/referenceexamples/coercion/birthdayparty.cpp
index fd6995597b..e729c42bb5 100644
--- a/examples/qml/referenceexamples/coercion/birthdayparty.cpp
+++ b/examples/qml/referenceexamples/coercion/birthdayparty.cpp
@@ -50,7 +50,7 @@
 #include "birthdayparty.h"
 
 BirthdayParty::BirthdayParty(QObject *parent)
-: QObject(parent), m_host(0)
+: QObject(parent), m_host(nullptr)
 {
 }
 
diff --git a/examples/qml/referenceexamples/default/birthdayparty.cpp b/examples/qml/referenceexamples/default/birthdayparty.cpp
index fd6995597b..e729c42bb5 100644
--- a/examples/qml/referenceexamples/default/birthdayparty.cpp
+++ b/examples/qml/referenceexamples/default/birthdayparty.cpp
@@ -50,7 +50,7 @@
 #include "birthdayparty.h"
 
 BirthdayParty::BirthdayParty(QObject *parent)
-: QObject(parent), m_host(0)
+: QObject(parent), m_host(nullptr)
 {
 }
 
diff --git a/examples/qml/referenceexamples/grouped/birthdayparty.cpp b/examples/qml/referenceexamples/grouped/birthdayparty.cpp
index fd6995597b..e729c42bb5 100644
--- a/examples/qml/referenceexamples/grouped/birthdayparty.cpp
+++ b/examples/qml/referenceexamples/grouped/birthdayparty.cpp
@@ -50,7 +50,7 @@
 #include "birthdayparty.h"
 
 BirthdayParty::BirthdayParty(QObject *parent)
-: QObject(parent), m_host(0)
+: QObject(parent), m_host(nullptr)
 {
 }
 
diff --git a/examples/qml/referenceexamples/grouped/main.cpp b/examples/qml/referenceexamples/grouped/main.cpp
index 8a137b0380..17dcd09c34 100644
--- a/examples/qml/referenceexamples/grouped/main.cpp
+++ b/examples/qml/referenceexamples/grouped/main.cpp
@@ -76,7 +76,7 @@ int main(int argc, char ** argv)
         else
             qWarning() << "She is inviting:";
 
-        Person *bestShoe = 0;
+        Person *bestShoe = nullptr;
         for (int ii = 0; ii < party->guestCount(); ++ii) {
             Person *guest = party->guest(ii);
             qWarning() << "   " << guest->name();
diff --git a/examples/qml/referenceexamples/methods/birthdayparty.cpp b/examples/qml/referenceexamples/methods/birthdayparty.cpp
index 7f2a2cc153..dfb36257eb 100644
--- a/examples/qml/referenceexamples/methods/birthdayparty.cpp
+++ b/examples/qml/referenceexamples/methods/birthdayparty.cpp
@@ -50,7 +50,7 @@
 #include "birthdayparty.h"
 
 BirthdayParty::BirthdayParty(QObject *parent)
-: QObject(parent), m_host(0)
+: QObject(parent), m_host(nullptr)
 {
 }
 
diff --git a/examples/qml/referenceexamples/properties/birthdayparty.cpp b/examples/qml/referenceexamples/properties/birthdayparty.cpp
index 1cb79c8b1b..8a5e9e553e 100644
--- a/examples/qml/referenceexamples/properties/birthdayparty.cpp
+++ b/examples/qml/referenceexamples/properties/birthdayparty.cpp
@@ -50,7 +50,7 @@
 #include "birthdayparty.h"
 
 BirthdayParty::BirthdayParty(QObject *parent)
-: QObject(parent), m_host(0)
+: QObject(parent), m_host(nullptr)
 {
 }
 
diff --git a/examples/qml/referenceexamples/signal/birthdayparty.cpp b/examples/qml/referenceexamples/signal/birthdayparty.cpp
index c0e4f177e5..a5fbb742a5 100644
--- a/examples/qml/referenceexamples/signal/birthdayparty.cpp
+++ b/examples/qml/referenceexamples/signal/birthdayparty.cpp
@@ -66,7 +66,7 @@ void BirthdayPartyAttached::setRsvp(const QDate &d)
 
 
 BirthdayParty::BirthdayParty(QObject *parent)
-: QObject(parent), m_host(0)
+: QObject(parent), m_host(nullptr)
 {
 }
 
diff --git a/examples/qml/referenceexamples/valuesource/birthdayparty.cpp b/examples/qml/referenceexamples/valuesource/birthdayparty.cpp
index beb59315ea..b107c61570 100644
--- a/examples/qml/referenceexamples/valuesource/birthdayparty.cpp
+++ b/examples/qml/referenceexamples/valuesource/birthdayparty.cpp
@@ -66,7 +66,7 @@ void BirthdayPartyAttached::setRsvp(const QDate &d)
 
 
 BirthdayParty::BirthdayParty(QObject *parent)
-: QObject(parent), m_host(0)
+: QObject(parent), m_host(nullptr)
 {
 }
 
diff --git a/examples/qml/tutorials/extending-qml/chapter4-customPropertyTypes/piechart.cpp b/examples/qml/tutorials/extending-qml/chapter4-customPropertyTypes/piechart.cpp
index 0107a1fc69..066963cf33 100644
--- a/examples/qml/tutorials/extending-qml/chapter4-customPropertyTypes/piechart.cpp
+++ b/examples/qml/tutorials/extending-qml/chapter4-customPropertyTypes/piechart.cpp
@@ -51,7 +51,7 @@
 #include "pieslice.h"
 
 PieChart::PieChart(QQuickItem *parent)
-    : QQuickItem(parent), m_pieSlice(0)
+    : QQuickItem(parent), m_pieSlice(nullptr)
 {
 }
 
diff --git a/examples/qml/tutorials/extending-qml/chapter5-listproperties/piechart.cpp b/examples/qml/tutorials/extending-qml/chapter5-listproperties/piechart.cpp
index 699fce14ca..ac680bb9c9 100644
--- a/examples/qml/tutorials/extending-qml/chapter5-listproperties/piechart.cpp
+++ b/examples/qml/tutorials/extending-qml/chapter5-listproperties/piechart.cpp
@@ -68,7 +68,7 @@ void PieChart::setName(const QString &name)
 //![0]
 QQmlListProperty<PieSlice> PieChart::slices()
 {
-    return QQmlListProperty<PieSlice>(this, 0, &PieChart::append_slice, 0, 0, 0);
+    return QQmlListProperty<PieSlice>(this, nullptr, &PieChart::append_slice, nullptr, nullptr, nullptr);
 }
 
 void PieChart::append_slice(QQmlListProperty<PieSlice> *list, PieSlice *slice)
diff --git a/examples/qml/tutorials/extending-qml/chapter6-plugins/import/piechart.cpp b/examples/qml/tutorials/extending-qml/chapter6-plugins/import/piechart.cpp
index 40b31b32de..1c712c887a 100644
--- a/examples/qml/tutorials/extending-qml/chapter6-plugins/import/piechart.cpp
+++ b/examples/qml/tutorials/extending-qml/chapter6-plugins/import/piechart.cpp
@@ -67,7 +67,7 @@ void PieChart::setName(const QString &name)
 
 QQmlListProperty<PieSlice> PieChart::slices()
 {
-    return QQmlListProperty<PieSlice>(this, 0, &PieChart::append_slice, 0, 0, 0);
+    return QQmlListProperty<PieSlice>(this, nullptr, &PieChart::append_slice, nullptr, nullptr, nullptr);
 }
 
 void PieChart::append_slice(QQmlListProperty<PieSlice> *list, PieSlice *slice)