Re: [Boost-users] [Thread] Constructing a move-only object asyncronously

Subject: Re: [Boost-users] [Thread] Constructing a move-only object asyncronously
From: Vicente J. Botet Escriba (vicente.botet_at_[hidden])
Date: 2013-03-19 18:14:20

Le 19/03/13 20:30, Alexander Lamaison a écrit :
> "Vicente J. Botet Escriba" <vicente.botet_at_[hidden]> writes:
>
>> Le 19/03/13 19:40, Alexander Lamaison a écrit :
>>> I'm trying to create a move-only object asyncronously using Boost.Thread
>>> unique_future but I'm running into trouble:
>>>
>>> error C2248: 'A::A' : cannot access private member declared in class 'A'
>>> c:\users\awl03\documents\visual studio
>>> 2005\projects\boost_1_51_0\boost\thread\future.hpp	493
>>>
>>> I've tried all sorts of ways to work around this but always end up with
>>> some variation or other of this error message.  What am I doing wrong?
>>>
> snip
>
>> you need to use version 4 to got this functionality.
> I assume this requires Boost 1.53?
>
>> I have modified your example to use boost::future (*) and use
>> packaged_task with a signature parameter (**). With this change it to
>> works for the following toolsets.
> Thanks!  Can you give me an idea of what changed in v4 to enable this?
> I've looked through the history but nothing stands out.
>
> I tried to make it work using just class thread rather than anything in
> <future.hpp>, but I couldn't work out how for a non-default
> constructible class.
>
>
I have just tried your example defining

#define BOOST_THREAD_USES_MOVE

and it works also.

Vicente