Re: vc 2010 beta2 bind unique_ptr move

"Igor Tandetnik" <>
Wed, 2 Dec 2009 16:58:18 -0500
nebojsa vujnovic <> wrote:

Igor Tandetnik wrote:

nebojsa vujnovic wrote:

I expected that move constructor is called not copy constructor and
I also expected that move
constructor will be called when callee is invoked.

What led you to expect the latter?

actually std::thread constructor led me to that

That constructor is explicitly documented to support MoveConstructible =
arguments. The reason for the difference, I presume, is because thread =
is known to call its function object exactly once.

std::thread uses similar mechanism as bind, and it will be possible to
transfer ownership using:
std::thread thr(foo, std::move(pint));
where pint is instance of unique_ptr<int>
and I still think that this should be same as:
std::thread thr(std::bind(foo, std::move(pint)));

bind doesn't know that it's going to be called only once.
With best wishes,
    Igor Tandetnik

With sufficient thrust, pigs fly just fine. However, this is not =
necessarily a good idea. It is hard to be sure where they are going to =
land, and it could be dangerous sitting under them as they fly overhead. =
-- RFC 1925

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