Re: [sigc] where is error? reference binding is impossible?

[Paul Pogonyshev <pogonyshev gmx net>]

klaus triendl wrote:
> ----- Original von:  Paul Pogonyshev <pogonyshev gmx net>:
> 
> > > Régis Duchesne wrote:
> > > To bind a reference, you must use sigc::ref() around the reference in 
> > > the sigc::bind() statement. Works perfectly. We use it all the time.
> 
> > OK, I'll assume there is no way to use it automatically (sigc++ code is
> > way to difficult to unerstand [quickly].)  I wish it was documented,
> > at least in 2.0.10 in Debian Sarge it seems to be undocumented...
> 
> 
> How would you do this automatically? It is better to bind a variable by value
> because there is no garanty that your bound variable is still valid if it would
> be bound by reference.  The compiler can't deduce whether you want to bind the
> variable by reference or by value.  Only you know and you have to make that
> specific in a way; the way in sigc++ (and also boost) is to use ref(). 

I didn't think about it, agreed.  (But it is kinda stupid to bind a Gtkmm widget
by value, right?)

Paul