Re: [Boost-users] [Thread] Can't compile package_task code with 1.54

Subject: Re: [Boost-users] [Thread] Can't compile package_task code with 1.54
From: Szymon Gatner (szymon.gatner_at_[hidden])
Date: 2013-06-01 06:34:13

Hi Vincente,

> I have found the error. My tests don't test for packaged_task<void()>.
>
> The following patch should fix the issue (see attached file)
>
> Please could you apply it a tell me if it fix with your compiler?
>
>
I am happy to confirm the fix, really appreciate so quick response from
you. To clarify: I was using boost_1_54_0_beta1_rc1.7z from beta
announcement.

Btw: I am using a workaround for packaged_task to be able store it in
std/boost::function:

      typedef boost::packaged_task<Ret()> Task;
      typedef boost::shared_ptr<Task> TaskPtr;
      TaskP task(new Task(f));
      addTask(boost::bind(&Task::operator (), task));

where:

      void addTask(boost::function<void()> task);

not a problem of course but with 1.54 beta I was still not able to just
move packaged_task to function directly:

  boost::packaged_task<void()> t1;

  boost::function<void()> f2(boost::move(t1));

gives:

Error 1 error C2248:
'boost::packaged_task<<unnamed-symbol>>::packaged_task' : cannot access
private member declared in class 'boost::packaged_task<<unnamed-symbol>>'
d:\devel\boost_1_54_0_beta1\boost\function\function_template.hpp 1070
ConsoleApplication2

same error with std::function.

Is this an issue with packaged_task or a std/boost function
implementations. I think boost::functions are not movable so they probably
try to copy packaged_task but not sure why it also doesn't work with
std::function.

Thanks again for the fix,
Regards,
Szymon Gtaner