Re: [Boost-users] boost bind, issue moving from 1.57 to 1.60

Subject: Re: [Boost-users] boost bind, issue moving from 1.57 to 1.60
From: Michael Powell (mwpowellhtx_at_[hidden])
Date: 2016-06-16 18:12:57

On Thu, Jun 16, 2016 at 5:39 PM, Jason Mancini <jayrusman_at_[hidden]> wrote:
>> I'm a user, but I've never seen a usage like this before.
>
>
> So this snippet comes from a sizable code base.  Took a long time to
> pinpoint then distill the issue down to the 6-line example!  Pretty sure
> that std::bind / std::function don't support this usage, or at least it
> didn't work when I tried for a few minutes.  Boost flavor seems a bit more
> featured.
>
>
> The actual offender is the bigger change in bind/bind.hpp from 1.59 to 1.60
> (not the trivial changes in args or placeholder).  I can see they added
> significant std::forward / rvalue support.  If I set
> BOOST_NO_CXX11_RVALUE_REFERENCES then also it continues to work.  I suspect
> we've hit a corner case issue with forward / rvalue and boost::function /
> boost::shared_ptr.

I did some work around tasking, promises, futures, a little while
back, and I seem to recall some questionable things in the perfect
forwarding support, but I can't recall if it was along similar lines.

HTH

> Jason
>
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