method returning child, doesn't overrides declared method returning parent

[Timon Gehr]

On 08/30/2011 06:00 PM, Steven Schveighoffer wrote:
> On Tue, 30 Aug 2011 11:58:43 -0400, Timon Gehr <timon.gehr at gmx.ch> wrote:
>
>> On 08/30/2011 05:49 PM, Christophe wrote:
>>> The fact that the code compile only if all interface methods are
>>> implemented does not imply that the programmer knows which method he
>>> implemented hooks and which does not.
>>
>> interface I{
>> void method();
>> }
>>
>> class C: I{
>> void method() {} // not a hook.
>> }
>
> Why not? All a "hook" is is adding an entry into a base class' vtable.
> This is no different, it's just the base "class" is an interface.
>
> -Steve

As far as I can tell, a hook is overwriting an existing entry.