Re: [Boost-bugs] [Boost C++ Libraries] #4521: Error using boost::move on packaged_task (MSVC 10)

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #4521: Error using boost::move on packaged_task (MSVC 10)
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-12-14 22:48:29

#4521: Error using boost::move on packaged_task (MSVC 10)
-------------------------------+--------------------------------------------
  Reporter:  ZenJu             |       Owner:  anthonyw   
      Type:  Bugs              |      Status:  new        
 Milestone:  To Be Determined  |   Component:  thread     
   Version:  Boost 1.44.0      |    Severity:  Showstopper
Resolution:                    |    Keywords:  move       
-------------------------------+--------------------------------------------

Comment (by viboes):

 If we follows the reference documentation, the example should not works as
 the functor (in this case a packaged task) must be copyable.


 {{{
 Thread Constructor

 template<typename Callable>
 thread(Callable func);

 Preconditions:

     Callable must by copyable.
 Effects:

     func is copied into storage managed internally by the thread library,
 and that copy is invoked on a newly-created thread of execution. If this
 invocation results in an exception being propagated into the internals of
 the thread library that is not of type boost::thread_interrupted, then
 std::terminate() will be called.
 Postconditions:

     *this refers to the newly created thread of execution.
 Throws:

     boost::thread_resource_error if an error occurs.

 Thread Constructor with arguments

 template <class F,class A1,class A2,...>
 thread(F f,A1 a1,A2 a2,...);

 Preconditions:

     F and each An must by copyable or movable.
 Effects:

     As if thread(boost::bind(f,a1,a2,...)). Consequently, f and each an
 are copied into internal storage for access by the new thread.
 Postconditions:

     *this refers to the newly created thread of execution.
 Throws:

     boost::thread_resource_error if an error occurs.
 Note:

     Currently up to nine additional arguments a1 to a9 can be specified in
 addition to the function f.


 }}}

 This doesn't means that the library shouldn't provide such a feature as
 otherwise it is unable to work with packaged_task. I have created a
 feature request for this purpose #6270 c++11 compliance: Add thread
 constructor from movable callable and movable arguments.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/4521#comment:5>
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