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

[Régis Duchesne <hpreg vmware com>]

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.

--
hpreg

Paul Pogonyshev wrote:
> Apparently f1() _is_ called, but with a reference pointing to a wrong
> place in memory...
>
>
> #include <iostream>
>
> #include <sigc++/sigc++.h>
>
>
> namespace
> {
>
>   void
>   f1 (int& x)
>   {
>     x = 1;
>   }
>
>
>   void
>   f2 (int* x)
>   {
>     *x = 1;
>   }
>
> }
>
>
> int
> main ()
> {
>   int  x1 = 0;
>
>   std::cout << "x1 = " << x1 << '\n';
>
>   sigc::slot <void>  _f1 = sigc::bind (&f1, x1);
>   _f1 ();
>
>   std::cout << "x1 = " << x1 << '\n';
>
>   int  x2 = 0;
>
>   std::cout << "x2 = " << x2 << '\n';
>
>   sigc::slot <void>  _f2 = sigc::bind (&f2, &x2);
>   _f2 ();
>
>   std::cout << "x2 = " << x2 << '\n';
>
>   return 0;
> }
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