Re: C++11 features, move semantics?

[Markus Kolb <markus kolb+gtkmm tower-net de>]

Am 2015-08-03 18:33, schrieb Yann LEYDIER:
> On 03/08/15 18:27, Markus Kolb wrote:
> > Am 2015-08-03 14:43, schrieb Yann LEYDIER:
> > > On 01/08/15 21:39, Murray Cumming wrote:
> > > > I'm open to the idea, but I'd like to see some small example of how
> > > > this might be used, please.
> > >
> > > The most immediate use of move semantics would be to be able to use 
> > > this:
> > > std::vector<Gtk::Label> labels;
> >
> > Do you mean the class inheritance problem on object copy to base 
> > class?
>
> Errrrrrr I'm not sure I understand your question but in C++11 a
> non-copyable class can now be used in vectors and other STL classes as
> long as it is moveable.

Ok. I haven't recognized that Label is not copyable.
But it doesn't change that you loose information of derived classes,
if you use the base class in the container, does it?
A std::vector<Gtk::Label*> is possible when you have to put in
derived objects, but a std::vector<Gtk::Label&> or 
std::vector<Gtk::Label>
is not.