Re: [Vala] I'm missing Java's anonymous classes

[Jim Peters <jim uazu net>]

Nor Jaidi Tuah wrote:
> > The compiled code is something like this (from memory):
> >
> >    self = uazu_win_widget_construct(uazu_win_display_relayout_imp, self);
> >
> > i.e. the delegate is a dual-pointer (func, target), with 'self' as the
> > second part.  But 'self' hasn't yet been initialised, because the
> > widget constructor call hasn't yet been made, so NULL is passed.
>
> This is interesting. I can't blame the vala developers
> for missing this one (or perhaps already considering
> and dismissing it). Consider directly constructing a Widget
> accepting its own method as a delegate:
>
>   var x = new Widget (x.foo !!!!????);
>
> > There is no way that the Vala compiler can make this work, as far as I
> > can see.  A delegate which depends on 'self' can never be passed to a
> > constructor.
>
> I think this can be fixed a using a separate alloc step
> (like in objective-c?).

Yes, good point -- that would work.

Jim

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