class ButtonRendererObj: virtual public x::obj { // ... }; class InputInterfaceObj: virtual public x::obj { // ... }; class ButtonObj : public ButtonRenderObj, public InputInterfaceObj { // ... }; x::ptr<ButtonRendererObj>> button; x::ptr<InputInterfaceObj>> inputp; // ... inputp=button;
Multiple inheritance works as expected. Virtual inheritance of the
x::obj superclass results in the derived
object virtually inheriting a single instance of it, and references
to any member of the inheritance hierarchy are convertible to any
other member of the inheritance hierarchy.