2013/6/1 Vicente J. Botet Escriba <vicente.botet@wanadoo.fr>
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