On Mon, 7 Jan 2019 19:24:53 +0100
Jonas Maebe <jo...@freepascal.org> wrote:
> On 07/01/19 17:32, Mattias Gaertner via fpc-devel wrote:
> > True, reason is that *non* static means there is a Self.
> > But since there is no "object of objecttype" and no "record of
> > recordtype", there is no type for Self in class methods of
> > objects/record.
>
> Object class methods do have a self parameter. If an object has a
> vmt, the object class methods get this vmt pointer passed as self
> parameter. Otherwise they get nil as self parameter. Kylix does not
> support calling object class methods through tobjecttype.classmethod
> either, which is indeed kind of strange.
Thanks. I learned something new.
But what is this Self?
TBird = object
class procedure DoIt; virtual;
end;
class procedure TBird.DoIt;
var
o: TBird;
begin
o:=Self;
// Error: Incompatible types: got "Class Of TBird" expected "TBird"
end;
But "Class Of TBird" does not exist in FPC, does it?
> It is not possible to declare a non-static class method (in FPC, at
> least; Kylix does not support "advanced records", so I cannot test
> there).
Mattias
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