[fpc-devel] Considerations about observer [was: Free Pascal 2.6.2 rc1]

[Marco van de Voort]

In our previous episode, michael.vancanneyt at wisa.be said:
> >> At some point, there must be an object, and at some point, there is a
> >> typecast,
> >
> > You often can't reroot external components, but if they support tcomponent
> 
> What does "reroot external components" mean ?

(Change the root of their inheritance tree. e.g. something that doesn't
inherit from interfacedobject to inherit from it)
 
> > (and thus Tinterfacedobject), you can add an interface in a child class.
> 
> The interfaces are CORBA, so there is no need for TInterfacedObject.

Ok. I assumed they also had to be COM compatible because of tiopf.

> That the interface is CORBA was a conscious decision so reference counting 
> and all the overhead associated with it was avoided. As far as I know, this
> rules out COM provided interfaces (if this is what you refer to by external
> components). That is a tradeoff I find acceptable.

For me personally that is unacceptable. But that is not with just an FPC hat
on.