Re: Converting a Glib::ValueBase to a derived type

[Murray Cumming <murrayc murrayc com>]

On Wed, 2008-01-30 at 14:48 -0500, José Alburquerque wrote:      
> >> Don't do that
> >> ( Glib::ValueBase get_something() )
> >>
> >> Do this:
> >>   void get_something(Glib::ValueBase& value);
> >>
> >> Then it's up to the caller to pass the correct type, and it's up to the
> >> get_something() to complain at runtime if it's not the correct type.
> >>
> >> See, for instance, Gtk::TreeModel
> >>   
> > I see; it works better returning value in reference.  Thanks.
> >   
> I forgot to ask:  How would the "get_something()" know if the value 
> returned is of the right type?

I'm not quite sure what you are asking, and the answer probably depends
on what you are doing? I guess you are trying to wrap a particular C
function. Which one?

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