A problem with GenLinearHierarchy from Alexandrescu's design

[JUANDENT]

Hi,

I am studying Andrei Alexandrescu's Modern C++ Design book and cannot access the OnEvent(Button&, int) implementation of:

using linear = Loki::GenLinearHierarchy<TYPELIST_3(Window, Button, Scrollbar), EventHandler >;
linear lin;

I can access for Window like this:

Window win;
lin.OnEvent(win, 55);

but the other virtual functions generated in the hierarchy are not available...
Why? How can I access them?

Regards