On Wednesday 12 June 2002 09:20 am, David Faure wrote:
> Hi Ashley,
>
> sorry for the slightly longer delay than usual, I was in Germany ;)

No problem, just remember to give a "wow" or something at Germain's code.=
 :)

> > I don't know how I lasted so long without a flags field in Smoke::Cla=
ss.
> > I need to know what classes have overridden virtual destructors, so I
> > know when to expect destructor callbacks. Currently, I use isa("QObje=
ct")
> > || isa("QPaintDevice"). I would also like to know which classes have =
copy
> > constructors. I'll probably use another flag to mark classes which ar=
e
> > listed but not defined (like QWidget would be in SmokeKDE).
> >
> > David, can you add a flags field to smoke.h whenever Kalyptus generat=
es
> > it?
> >
> > +    enum ClassFlags {
> > +=09cf_constructor =3D 0x01,=09// has constructor
> > +=09cf_deepcopy =3D 0x02,=09// has copy constructor
> > +=09cf_virtual =3D 0x04,=09// has virtual destructor
> > +=09cf_undefined =3D 0x10=09// defined elsewhere
> > +    };
>
> Done. I made kalyptus set the cf_constructor and cf_deepcopy flags, fro=
m
> {CanBeInstanciated} and {CanBeCopied} ones.
> What is cf_virtual good for? For sure I got rid of it in kalyptus itsel=
f,
> which means the generated code doesn't depend on whether there are
> virtual methods or not (or specifically a virtual dtor). But I don't ha=
ve
> the full picture, if you say you need it I can easily add it ;)

I need to know when I'll get a callback on object destruction. If Qt dele=
tes=20
an object PerlQt created without a virtual destructor, I'll never know ab=
out=20
it.

There are two reasons. First, I have at least one global data structure w=
hich=20
grows when (virtual) objects are created, the pointer =3D> object map. Wh=
en=20
pointers are deleted, I need to delete the mappings or face a memory leak=
=2E=20
Second, if I don't know whether an object is already deleted by Qt, I mig=
ht=20
delete it again.

Like I said above, I currently *guess* whether an object has a virtual=20
destructor depending on what class it inherits. I'd like it to be more=20
general than that. Perhaps knowing that QEvent has a virtual destructor w=
ill=20
come in handy someday. *shrug*

Ashley Winters