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 08:18:45

2013/6/1 Vicente J. Botet Escriba <vicente.botet_at_[hidden]>

>
> IMO boost::function doesn't supports move semantics. I will take a look at
> std::function. Could you post the error with std::function?
>
>
code:

#define BOOST_THREAD_VERSION 4

#include <boost/thread/future.hpp>
#include <functional>

int main()
{
  boost::packaged_task<void()> t1;

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

error:

1>------ Build started: Project: ConsoleApplication2, Configuration: Debug
Win32 ------
1>  main.cpp
1>c:\program files (x86)\microsoft visual studio
11.0\vc\include\xrefwrap(317): error C2248:
'boost::packaged_task<<unnamed-symbol>>::packaged_task' : cannot access
private member declared in class 'boost::packaged_task<<unnamed-symbol>>'
1>          with
1>          [
1>              <unnamed-symbol>=void (void)
1>          ]
1>          d:\devel\boost_1_54_0_beta1\boost\thread\future.hpp(2783) : see
declaration of 'boost::packaged_task<<unnamed-symbol>>::packaged_task'
1>          with
1>          [
1>              <unnamed-symbol>=void (void)
1>          ]
1>          c:\program files (x86)\microsoft visual studio
11.0\vc\include\xrefwrap(404) : see reference to function template
instantiation
'std::_Callable_base<_Ty,_Indirect>::_Callable_base<_Ty&>(_Ty2)' being
compiled
1>          with
1>          [
1>              _Ty=boost::packaged_task<void (void)>,
1>              _Indirect=false,
1>              _Ty2=boost::packaged_task<void (void)> &
1>          ]

I initially though behavior was different when using boost::move() and
std::move() to move t1 but boost::move actually is std::move on C++11
compiler. Hope this helps.

Cheers,
Simon