Re: [Vala] vala-list Digest, Vol 61, Issue 7

[JM <interflug1 gmx net>]

Interesting. But this feature seems undocumented, I cannot find it in
the tutorial.


Am Sonntag, den 16.12.2012, 20:20 +0100 schrieb Jonas Kulla:
> 2012/12/16 JM <interflug1 gmx net>
>
> > Overriding a signal or making it virtual does not really make sense,
> > does it?
> > A signal does not have a body, as a function would have and signature is
> > always the same, even in child classes.
> >
> >
> > Also your example seems weird, as you have bodys for signals.
> >
> > Regards
>
> No, signals in Vala can be virtual and can have bodies.
> GObject offers so called "default handles" for signals,
> which can be specified as an offset in the class struct to the handler
> function pointer. Because the handler is in the class struct,
> it can be "overriden" by subclasses, hence the analogy "virtual signal".
> Vala translates the signal body to a virtual function and sets it as the
> default handler for the signal.
>
>  - Jonas
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