QT GUI

class ui_Dlg;
class Dlg : 
{
Q_OBJECT
public:
explicit Dlg(QObject *parent=nullptr);
~Dlg();
signals:
public slots:
private:
    void initVariables();
    void initSignalSlots();
private:
     QScopedPointer<ui_Dlg> ui;
     QScopedPointer<privateStruct> d;
};

struct Dlg::privateStruct
{
    QScopedPointer<> aaa;
};

Dlg::Dlg(), d(new privateStruct)
{
}