On 2014.10.22 at 17:15 +0200, Martin Liška wrote:
> Hello.
>
> I've been playing with following example:
>
> #include <stdlib.h>
>
> class Base
> {
> public:
> virtual ~Base() {}
> };
>
> class Derived: public Base
> {
> };
>
> #define N 1000
>
> int main()
> {
> Base **b = (Base **)malloc (sizeof(Base *) * N);
> for (unsigned i = 0; i < N; i++)
> b[i] = new Derived();
>
> for (unsigned i = 0; i < N; i++)
> delete b[i];
>
> return 0;
> }
>
> Where I would like to somehow give an advice to devirtualize
> machinery. My motivation is to inline destruction in 'delete b[i]'.
> 'final' keyword does not solve my problem:
>
> a.c:9:7: error: virtual function ‘virtual Derived::~Derived()’
> class Derived: public Base
> ^
> a.c:6:11: error: overriding final function ‘virtual Base::~Base()’
> virtual ~Base() final {}
What about:
class Derived final: public Base {};
--
Markus
