Hi

I'm struggling to get my own class registered in the Meta-Object system. Here is my class:

Qt Code: 
  1. namespace MyNamespace{
  2.     class ObserverProperty : public QObject
  3.     {
  4.         Q_OBJECT
  5.  
  6.     public:
  7.         ObserverProperty(const QString& property_name = QString(), QObject* parent = 0) : QObject(parent)  {
  8.             observer_map = new QMap<QString,QVariant>;
  9.             setObjectName(property_name);
  10.         }       
  11.  
  12.         ObserverProperty(const ObserverProperty& observer_property) {
  13.             observer_map = new QMap<QString,QVariant>(observer_property.observerMap());
  14.             setObjectName(observer_property.objectName());
  15.             setParent(observer_property.parent());
  16.         }
  17.         ~ObserverProperty() {}
  18.  
  19.         inline QMap<QString,QVariant> observerMap() const { return *observer_map; }
  20.  
  21.     protected:
  22.         QMap<QString,QVariant>* observer_map;
  23.     };
  24.  
  25. }
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And I register the class using the following call, at the bottom of the header file:

Qt Code: 
  1. Q_DECLARE_METATYPE(MyNamespace::ObserverProperty);
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I want to set this class as a property on a QObject, and the following piece of code works:

Qt Code: 
  1. QVariant prop;
  2.         prop = obj->property(property_name.toStdString().data());
  3.         if (prop.isValid() && prop.canConvert<ObserverProperty>()) {
  4.             // Ok it exists.
  5.         }
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But If I understand correctly, I need to call the following to be able to create a QVariant with my class in it:

Qt Code: 
  1. qRegisterMetaType<MyNamespace::ObserverProperty>("ObserverProperty");
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And then create a QVariant with my class in it in the following way:

Qt Code: 
  1. ObserverProperty observer_property("My Property");
  2. QVariant property= qVariantFromValue(observer_property);
  3. obj->setProperty(observer_property.objectName().toStdString().data(),property)
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Now the problem is, I get the following error when compiling the qRegisterMetaType() call.

Qt Code: 
  1. error: expected constructor, destructor, or type conversion before '(' token
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I can't figure out why this is. Is is perhaps because of something wrong in my class? Or perhaps something to do with namespaces.

Any help will be much appreciated.

Thanks,
Jaco