Re: [boost] [reference_wrapper] add operator()(Args...) to reference_wrapper

Subject: Re: [boost] [reference_wrapper] add operator()(Args...) to reference_wrapper
From: Jeffrey Lee Hellrung, Jr. (jeffrey.hellrung_at_[hidden])
Date: 2012-05-09 12:42:04

On Wed, May 9, 2012 at 3:04 AM, Philipp Moeller <
philipp.moeller_at_[hidden]> wrote:

> "Jeffrey Lee Hellrung, Jr." <jeffrey.hellrung_at_[hidden]> writes:
>
> > On Fri, Apr 20, 2012 at 5:03 AM, Philipp Moeller <
> > philipp.moeller_at_[hidden]> wrote:
> >
> >> Given that Boost now has perfect forwarding emulation through Boost.Move
> >> and a better result_of, would it be possible to enable reference_wrapper
> >> to forward the function call operator?
> >>
> >> The current behavior is somewhat surprising and makes a few of the most
> >> promising applications of reference_wrapper (reference wrap polymorphic
> >> boost::function objects) impossible with code that is no prepared to
> >> work with reference_wrapper. It would also be more consistent with
> >> reference_wrapper of the stdlib.
> >>
> >> I can file a corresponding bug report and add a patch, if there is
> >> interest.
> >>
> >
> > I think this would make a nice addition to the boost::reference_wrapper
> > interface.
> >
> > Isn't there a CRTP base class in Boost that aids in programming
> > nearly-perfect forwarding in C++03?
> >
>
> I couldn't find it and did it with PP.
>
> I've added this as ticket #6876 [1] for boost::bind. I'm unsure if this
> belongs there or to some other component and the maintainer of bind
> seems inactive. So I would be glad if someone else could have a look at
> that patch, it might need some tweaking (especially the macro names).
>
> Footnotes:
> [1]  https://svn.boost.org/trac/boost/ticket/6876
>

I think this is what I was thinking of:

http://www.boost.org/doc/libs/1_49_0/libs/functional/forward/doc/html/index.html

- Jeff