Thomas Hruska a écrit :
> class MyBase
> {
> public:
> MyBase() {}
> virtual ~MyBase() {}
>
> virtual MyBase *Copy() const
> {
> return new MyBase(*this);
> }
> };
>
> class MyBase2
> {
> public:
> MyBase2() {}
> virtual ~MyBase2() {}
>
> virtual MyBase2 *Copy() const
> {
> return new MyBase2(*this);
> }
> };
>
> class MyDerived : public MyBase, public MyBase2
> {
> public:
> MyDerived() {}
> virtual ~MyDerived() {}
>
> virtual MyDerived *Copy() const
> {
> return new MyDerived(*this);
> }
> };
>
> Without the ', public MyBase2' above, it compiles just fine. With it, I
> get (using VS.NET 2003 SP1):
>
> error C2511: 'MyBase2 *MyDerived::Copy(void)' : overloaded member
> function not found in 'MyDerived'
>
> Point me at the right section in the Standard that says this is correct
> behavior. It seems like a bug to me. Then again, I don't generally
> derive from more than one class. (This is a simplified case of
> something much more complex - and I tested the above code before posting).
>
>
Look for "covariant return".
If I am right, it come late in the standard so some compilers don't
support it.
David
