Hey guys,
I compiled gtkmm with GTKMM_ATKMM_ENABLED 1
Applied a simple fix, run an example gtkmm program and it works just fine!
Here is how classes inherit destructors in order: ( I marked important code
with bold )
*Glib::ObjectBase*
class ObjectBase : virtual public sigc::trackable
{
*protected:*
virtual ~ObjectBase() noexcept = 0; // pure virtual dtor, any
derived class dtor *won't throw.*
}
*Glib::Object*
class Object : virtual *public ObjectBase*
{
*protected:*
virtual ~Object() noexcept;
}
*Glib::Interface*
class Interface : virtual *public Glib::ObjectBase*
{
*public:*
virtual ~Interface() noexcept;
}
*Atk::Implementor*
class Implementor : *public Glib::Interface*
{
public:
virtual ~Implementor() noexcept; *// I think this is bad, you'll
see why ...*
}
*Gtk::Widget*
class Widget : public Object, public Buildable
*#ifdef GTKMM_ATKMM_ENABLED*
,*public Atk::Implementor*
{
//...
}
Now let's see the implementation of Atk::~Implementor()
*Implementor::~Implementor() noexcept { }* * // do you see why this is bad
?*
Atk::~Implementor is defined but it can't call Glib::Object::~Object()
*because Glib::Object::~Object() is declared protected*
I have removed ~Implementor() destructor and let the compiler generate one.
recompiled atkmm and it now it works just fine!
Please give your opinion, did I do the right thing? I'm not 100% sure.
On Wed, Nov 18, 2015 at 3:07 PM, John Emmas <[email protected]> wrote:
> On 18/11/2015 12:39, John Emmas wrote:
>
>
> //Any instantiable class that derives from Interface should also
> inherit from Object.
>
> I noticed that Atk::Implmentor does derive from Glib::Interface but it
> doesn't inherit from Object. Could that be the problem?
>
>
> I just discovered something else interesting... I don't know if this is
> technically valid code but FWIW, even something as simple as this hangs:-
>
> int main (int argc, char *argv[])
> {
> Atk::Implementor *imp = new Atk::Implementor (NULL);
>
> delete imp; // <-- hangs here !!
>
> return 0;
> }
>
> _______________________________________________
> gtkmm-list mailing list
> [email protected]
> https://mail.gnome.org/mailman/listinfo/gtkmm-list
>
>
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