Inline QPropertyBindingDataPointer

The only non-inline function of that class was observerCount() which
would use two of the inline functions defined in the header file, so
we can safely inline observerCount() and make the whole class contain
only inline methods

Consequently, inline class doesn't have to be exported in Windows

Change-Id: I41d144d9a50420bbc0091992b36cc36ac2567704
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

Author: andrey-golubev

src/corelib/kernel/qproperty.cpp

@@ -608,13 +608,6 @@ QPropertyBindingData::NotificationResult QPropertyBindingData::notifyObserver_he
     return Evaluated;
 }
 
-int QPropertyBindingDataPointer::observerCount() const
-{
-    int count = 0;
-    for (auto observer = firstObserver(); observer; observer = observer.nextObserver())
-        ++count;
-    return count;
-}
 
 QPropertyObserver::QPropertyObserver(ChangeHandler changeHandler)
 {

src/corelib/kernel/qproperty_p.h

@@ -68,7 +68,7 @@ namespace QtPrivate {
 // we need to allow the compiler to inline where it makes sense.
 
 // This is a helper "namespace"
-struct Q_AUTOTEST_EXPORT QPropertyBindingDataPointer
+struct QPropertyBindingDataPointer
 {
     const QtPrivate::QPropertyBindingData *ptr = nullptr;
 
@@ -85,10 +85,10 @@ struct Q_AUTOTEST_EXPORT QPropertyBindingDataPointer
     }
     static void fixupAfterMove(QtPrivate::QPropertyBindingData *ptr);
     void Q_ALWAYS_INLINE addObserver(QPropertyObserver *observer);
-    void setFirstObserver(QPropertyObserver *observer);
-    QPropertyObserverPointer firstObserver() const;
+    inline void setFirstObserver(QPropertyObserver *observer);
+    inline QPropertyObserverPointer firstObserver() const;
 
-    int observerCount() const;
+    inline int observerCount() const;
 
     template <typename T>
     static QPropertyBindingDataPointer get(QProperty<T> &property)
@@ -442,6 +442,14 @@ inline QPropertyObserverPointer QPropertyBindingDataPointer::firstObserver() con
     return { reinterpret_cast<QPropertyObserver *>(ptr->d()) };
 }
 
+inline int QPropertyBindingDataPointer::observerCount() const
+{
+    int count = 0;
+    for (auto observer = firstObserver(); observer; observer = observer.nextObserver())
+        ++count;
+    return count;
+}
+
 namespace QtPrivate {
     Q_CORE_EXPORT bool isPropertyInBindingWrapper(const QUntypedPropertyData *property);
     void Q_CORE_EXPORT initBindingStatusThreadId();