[fpc-pascal] why constructor of TObject is NOT virtual but destructor is?

[Marco van de Voort]

In our previous episode, Xiangrong Fang said:
> I would like to know the benefit of making constructor / destructor
> virtual.  As described here:
> 
> http://c2.com/cgi/wiki?VirtualConstructor
> 
> The benefit of virtual constructor seems related to "class reference". As
> far as I understand, it is related to how LCL works, like:
> 
> CreateComponent(AComponent: TComponentClass);
> 
> My questions are:
> 
> 1) if the above understanding is correct AND COMPLETE, why the constructor
> of TObject is not virtual? What problem will appear IF we make it virtual?

> 2) What is the purpose of making destructor of TObject virtual?

I think you are thinking in the right direction, parameters is the reason.
This means that a framework that wants two or differently typed parameters
to the constructor can introduce its own deepest level constructor.