Strange and fault behaviour when creating slots by the gui from custom signals.

When creating a slot by the gui by selecting 'goto slot...', the created slots sometimes use a reference parameter and sometimes not.

For example

clicked(int)

creates

on_widget_clicked(int )

and

doubleClicked(Qt::MouseButton, int, int)

creates

on_widget_doubleClicked(const Qt::MouseButton &, const  int &, const  int &)

For some signals the created code is incorrect:

mouseWheel(Qt::KeyboardModifiers, int, const QPoint, bool)

creates

on_widget_mouseWheel(const Qt::KeyboardModifiers &, const  int &, const  const QPoint &, const  bool &)

The '&' character is not allowed when adding a signal. So there is no way to force (or prevent) from creating a reference parameter.