Will a base destructor always be called when a derived object is deleted?

Question

say I have the following:

class Foo {
public:
void destroy();
~Foo()
{
   destroy();
}
};

class Bar : public Foo {
public:
~Bar() {}
};

If I have a Bar object, will Foo's destructor be called when the Bar objected is deleted?

Thanks

Answer 1

Yes.

But the above code is dangerous; if you don't declare ~Foo() as virtual, then ~Bar() won't be called if you invoke delete on a Bar object via a Foo *.