Re: [sigc] How does std::function<> work with libsigc++

[Murray Cumming <murrayc murrayc com>]

On Mon, 2013-07-29 at 20:54 +0100, Chris Vine wrote:
> On Mon, 29 Jul 2013 20:44:02 +0200
> Kjell Ahlstedt <kjell ahlstedt bredband net> wrote:
> > > Wouldn't it be cleaner to just (or also) add a specific
> > > connect(std::function<>) method overload that did this
> > > automatically?
> > Sure. I wish I knew how to do it. sigc::track_obj() forces you to 
> > manually specify which trackable objects the functor contains. This
> > is not nearly as nice as the automatic detection of trackable objects
> > in the rest of libsigc++. The enormous use of C++ templates in
> > libsigc++ is near, or even beyond, the limits of my comprehension.
>
> I have to say I disagree with that.  One of the banes of libsigc++ is
> that it makes any slot for a non-static method of a class deriving
> from sigc::trackable as a tracked slot, which is sometimes what you do
> not want.  It is better to enable the user to choose when constructing
> the slot.
[snip]

Can you give us an example of when you would not want the slot to be
tracked?


-- 
Murray Cumming
murrayc murrayc com
www.murrayc.com
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