[boost] Re: Perfect Forwarding (almost)

From: David Abrahams (dave_at_[hidden])
Date: 2004-02-08 15:04:04

Daniel Wallin <dalwan01_at_[hidden]> writes:

> With Mojo you would do something like:
>
>    struct X : moveable<X>
>    {
>        X(X&);
>        X(constant_ref<X>);
>        X(rvalue_ref<X>); // move constructor
>    };
>
> And it would always move from rvalues. 

Meaning that you could pass an X rvalue by-value to an X parameter
without any deep copying?

> The intrusive part was that to
> solve the whole "binding rvalues to const&" problem you needed to return
> some special wrapper type:
>
>    moved<X> f();

Oh, really?  Too bad; I guess this isn't really much of an innovation
then.

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com