On Fri, 2011-10-07 at 14:54 -0400, José Alburquerque wrote: > On Fri, 2011-10-07 at 12:54 +0200, Murray Cumming wrote: > > On Fri, 2011-10-07 at 09:29 +0200, Markus Elfring wrote: > > > By which (member) function can such a variable be marked to contain an > > > unknown > > > value? > > > (Do I overlook a programming interface once more?) > > > http://developer.gnome.org/glibmm/2.30/classGlib_1_1VariantBase.html > > > > It looks like we don't have any API yet to create a "maybe" > > Glib::Variant. The C API is g_variant_new_maybe() but we don't seem to > > use that yet. I don't know how we would support this in a template > > specialization. > > One possible way might be to add a create_maybe() method to > Glib::VariantContainerBase that could use the > Glib::VariantBase::get_type() method of its children to create the maybe > type, but I'm not sure it would work. I guess I can try and add it for > glibmm-2.32 and see if it works.
Though as you point out, Murray, it isn't as easy as it sounds because a create method should ideally return the type of the derived class. I'll try to give it a little thought and see if something is possible for 2.32. > > > > > Note that GVariant generally doesn't have set functions. It's meant to > > be an invariant type. That probably makes it unsuitable for general use > > anyway. > > > -- José _______________________________________________ gtkmm-list mailing list [email protected] http://mail.gnome.org/mailman/listinfo/gtkmm-list
