[C++-sig] make_tuple()?

[David Abrahams]

From: "Ralf W. Grosse-Kunstleve" <rwgk at yahoo.com>

> Yet another (unopinionated) question: What is better (in your opinion)?
>
>     static
>     object
>     getstate(back_reference<world const&> x)
>     {
>       world const& w = x.get();
>     }
>
> or
>
>     static
>     object
>     getstate(object const& x)
>     {
>       // use extractor<world const&>
>     }

It depends how you want it to interact with overloading.

> Is back_reference<> obsolete?

No, object will match anything but back_reference<T> matches only arguments
convertible to T.

HTH,
Dave