Re: [Boost-bugs] [Boost C++ Libraries] #9303: packaged_task<R(Argtypes)> does not compile using c++03 and Cmake 2.8.9

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #9303: packaged_task<R(Argtypes)> does not compile using c++03 and Cmake 2.8.9
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-11-02 13:40:22

#9303: packaged_task<R(Argtypes)> does not compile using c++03 and Cmake 2.8.9
-------------------------------+---------------------------------------
  Reporter:  e66a5b10@…        |      Owner:  viboes
      Type:  Bugs              |     Status:  assigned
 Milestone:  To Be Determined  |  Component:  thread
   Version:  Boost 1.54.0      |   Severity:  Problem
Resolution:                    |   Keywords:  packaged_task, bind, asio
-------------------------------+---------------------------------------

Comment (by viboes):

 I'm really sorry. This doesn't works yet for non C++91 compilers. Here it
 is the code


 {{{
 #if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
   #if defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
     template<typename R, typename ...ArgTypes>
     class packaged_task<R(ArgTypes...)>
     {
       typedef
 boost::shared_ptr<detail::task_base_shared_state<R(ArgTypes...)> >
 task_ptr;
       boost::shared_ptr<detail::task_base_shared_state<R(ArgTypes...)> >
 task;
   #else
     template<typename R>
     class packaged_task<R()>
     {
       typedef boost::shared_ptr<detail::task_base_shared_state<R()> >
 task_ptr;
       boost::shared_ptr<detail::task_base_shared_state<R()> > task;
   #endif
 }}}

 As you can see, only if BOOST_THREAD_PROVIDES_VARIADIC_THREAD you can use


 {{{
 boost::packaged_task<std::string(std::string&)>
 }}}


 I'm not sure Example 5 is a bug on Boost.Thread, I suspect that this is
 just not supported in C++03.

 Unfortunately I have no time to develop this for C++03 compilers.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/9303#comment:3>
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