Dear all,
I have the following structure in my project:
class A
{
public:
A() { };
}
class B : virtual public A
{
}
class C : virtual public A
{
}
class D : public B, public C
{
public:
D() {};
}
class E : public D
{
public:
E(Something *s) : smth(s) {};
private:
Something *smth;
}
and this seems to work fine. However, as soon as I add another level
and rework the structure as follows:
class E : public D
{
public:
E() {};
}
class F : public E
{
public:
F(Something *s) : smth(s) {};
private:
Something *smth;
}
I begin getting cryptic error messages on the link phase like
general/lib.o(.gnu.linkonce.t._ZN15FC1EP14Something+0x16): In function
`F::F[in-charge](Something*)':
/usr/include/c++/3.3/bits/stl_algobase.h:538: undefined reference to `VTT for F'
Could somebody please explain what I'm doing wrong? Online manuals
don't seem to help as their chapters on virtual inheritance usually
end with the D class and do not go into F and E classes.
Thank you!
With best regards,
Sergey Nikolenko.
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