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>

4 files changed, 15 insertions, 15 deletions

diff --git a/src/qml/jsapi/qjsengine.cpp b/src/qml/jsapi/qjsengine.cpp
index 1c1314f05d..c483af638b 100644
--- a/src/qml/jsapi/qjsengine.cpp
+++ b/src/qml/jsapi/qjsengine.cpp
@@ -783,7 +783,7 @@ QJSEngine *qjsEngine(const QObject *object)
 {
     QQmlData *data = QQmlData::get(object, false);
     if (!data || data->jsWrapper.isNullOrUndefined())
-        return 0;
+        return nullptr;
     return data->jsWrapper.engine()->jsEngine();
 }
 
diff --git a/src/qml/jsapi/qjsengine_p.h b/src/qml/jsapi/qjsengine_p.h
index cbfe0f14a3..1ea1d77851 100644
--- a/src/qml/jsapi/qjsengine_p.h
+++ b/src/qml/jsapi/qjsengine_p.h
@@ -163,7 +163,7 @@ QQmlPropertyCache until the QQmlEngine is destroyed.
 QQmlPropertyCache *QJSEnginePrivate::cache(QObject *obj)
 {
     if (!obj || QObjectPrivate::get(obj)->metaObject || QObjectPrivate::get(obj)->wasDeleted)
-        return 0;
+        return nullptr;
 
     Locker locker(this);
     const QMetaObject *mo = obj->metaObject();
diff --git a/src/qml/jsapi/qjsvalue.cpp b/src/qml/jsapi/qjsvalue.cpp
index c4090ac482..b97468ab7b 100644
--- a/src/qml/jsapi/qjsvalue.cpp
+++ b/src/qml/jsapi/qjsvalue.cpp
@@ -662,7 +662,7 @@ QVariant QJSValue::toVariant() const
         return QVariant(val->asDouble());
     }
     if (val->isNull())
-        return QVariant(QMetaType::Nullptr, 0);
+        return QVariant(QMetaType::Nullptr, nullptr);
     Q_ASSERT(val->isUndefined());
     return QVariant();
 }
@@ -831,7 +831,7 @@ QJSEngine* QJSValue::engine() const
     QV4::ExecutionEngine *engine = QJSValuePrivate::engine(this);
     if (engine)
         return engine->jsEngine();
-    return 0;
+    return nullptr;
 }
 
 #endif // QT_DEPRECATED
@@ -884,7 +884,7 @@ void QJSValue::setPrototype(const QJSValue& prototype)
     if (!val)
         return;
     if (val->isNull()) {
-        o->setPrototype(0);
+        o->setPrototype(nullptr);
         return;
     }
 
@@ -1308,11 +1308,11 @@ QObject *QJSValue::toQObject() const
 {
     QV4::ExecutionEngine *engine = QJSValuePrivate::engine(this);
     if (!engine)
-        return 0;
+        return nullptr;
     QV4::Scope scope(engine);
     QV4::Scoped<QV4::QObjectWrapper> wrapper(scope, QJSValuePrivate::getValue(this));
     if (!wrapper)
-        return 0;
+        return nullptr;
 
     return wrapper->object();
 }
@@ -1329,11 +1329,11 @@ const QMetaObject *QJSValue::toQMetaObject() const
 {
     QV4::ExecutionEngine *engine = QJSValuePrivate::engine(this);
     if (!engine)
-        return 0;
+        return nullptr;
     QV4::Scope scope(engine);
     QV4::Scoped<QV4::QMetaObjectWrapper> wrapper(scope, QJSValuePrivate::getValue(this));
     if (!wrapper)
-        return 0;
+        return nullptr;
 
     return wrapper->metaObject();
 }
@@ -1389,7 +1389,7 @@ bool QJSValue::isRegExp() const
 bool QJSValue::isQObject() const
 {
     QV4::Value *val = QJSValuePrivate::getValue(this);
-    return val && val->as<QV4::QObjectWrapper>() != 0;
+    return val && val->as<QV4::QObjectWrapper>() != nullptr;
 }
 
 /*!
@@ -1403,7 +1403,7 @@ bool QJSValue::isQObject() const
 bool QJSValue::isQMetaObject() const
 {
     QV4::Value *val = QJSValuePrivate::getValue(this);
-    return val && val->as<QV4::QMetaObjectWrapper>() != 0;
+    return val && val->as<QV4::QMetaObjectWrapper>() != nullptr;
 }
 
 QT_END_NAMESPACE
diff --git a/src/qml/jsapi/qjsvalue_p.h b/src/qml/jsapi/qjsvalue_p.h
index c4761ad6ea..62e09f72be 100644
--- a/src/qml/jsapi/qjsvalue_p.h
+++ b/src/qml/jsapi/qjsvalue_p.h
@@ -68,7 +68,7 @@ public:
     static inline QV4::Value *getValue(const QJSValue *jsval)
     {
         if (jsval->d & 3)
-            return 0;
+            return nullptr;
         return reinterpret_cast<QV4::Value *>(jsval->d);
     }
 
@@ -76,7 +76,7 @@ public:
     {
         if (jsval->d & 1)
             return reinterpret_cast<QVariant *>(jsval->d & ~3);
-        return 0;
+        return nullptr;
     }
 
     static inline void setVariant(QJSValue *jsval, const QVariant &v) {
@@ -153,14 +153,14 @@ public:
             *v = QV4::Encode(variant->toUInt());
             break;
         default:
-            return 0;
+            return nullptr;
         }
         return v;
     }
 
     static QV4::ExecutionEngine *engine(const QJSValue *jsval) {
         QV4::Value *v = getValue(jsval);
-        return v ? QV4::PersistentValueStorage::getEngine(v) : 0;
+        return v ? QV4::PersistentValueStorage::getEngine(v) : nullptr;
     }
 
     static inline bool checkEngine(QV4::ExecutionEngine *e, const QJSValue &jsval) {