Re: [Vala] Interfaces and Mixins

[Robert Powell <rob yorba org>]

On Tue, Jun 15, 2010 at 4:00 PM, tecywiz121 <tecywiz121 hotmail com> wrote:

> On Tue, 2010-06-15 at 14:50 -0700, Robert Powell wrote:
> > On Sat, Jun 12, 2010 at 7:03 AM, tecywiz121 <tecywiz121 hotmail com>
>
> You can access Entity.flush by casting this to an Entity.  I think
> > you'll find that when you refer to the object you will receive GObject
> > warnings about cannot add interface type 'Entity'.  Even without the
> > name collision of flush, this GObject warning will still occur.
>
> Wouldn't the following code (not sure, haven't tried) just recurse
> infinitely?
>
> public object Bob : Object, Flushable, Entity
> {
>    public void flush()
>    {
>        ((Entity)this).flush();
>     }
> }
As long as Entity's implementation of flush doesn't call Bob's
implementation of flush, I don't see why it would recurse.


> > Deriving interfaces from interfaces is definitely broken.  You might
> > want to submit a bug.
>
> Actually in my other interfaces, it works fine.  I'm just not sure if
> I'm allowed to override a method declared in Flushable in Entity.
Do your other interfaces derive from another interface?  I think that is
where trouble lies, or used to lie.

Rob