Re: [Boost-bugs] [Boost C++ Libraries] #8674: Futures as local named objects can't be returned with implicit move.

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #8674: Futures as local named objects can't be returned with implicit move.
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-06-09 11:16:23

#8674: Futures as local named objects can't be returned with implicit move.
-------------------------------+----------------------
  Reporter:  mjklaim@…         |      Owner:  viboes
      Type:  Bugs              |     Status:  assigned
 Milestone:  To Be Determined  |  Component:  thread
   Version:  Boost 1.53.0      |   Severity:  Problem
Resolution:                    |   Keywords:
-------------------------------+----------------------

Comment (by mjklaim@…):

 Ok I found something. In delete.hpp:

 {{{

 /**
  * BOOST_THREAD_DELETE_COPY_CTOR deletes the copy constructor when the
 compiler supports it or
  * makes it private.
  *
  * BOOST_THREAD_DELETE_COPY_ASSIGN deletes the copy assignment when the
 compiler supports it or
  * makes it private.
  */
 #ifndef BOOST_NO_CXX11_DELETED_FUNCTIONS
 #define BOOST_THREAD_DELETE_COPY_CTOR(CLASS) \
       CLASS(CLASS const&) = delete; \

 #define BOOST_THREAD_DELETE_COPY_ASSIGN(CLASS) \
       CLASS& operator=(CLASS const&) = delete;

 #else // BOOST_NO_CXX11_DELETED_FUNCTIONS
 #define BOOST_THREAD_DELETE_COPY_CTOR(CLASS) \
     private: \
       CLASS(CLASS&); \             // <--- HERE
     public:

 #define BOOST_THREAD_DELETE_COPY_ASSIGN(CLASS) \
     private: \
       CLASS& operator=(CLASS&); \  // <--- HERE
     public:
 #endif // BOOST_NO_CXX11_DELETED_FUNCTIONS

 }}}


 Notice that the non-c++11 implementation define private copy constructor
 and assignation using '''non-const''' references.


 {{{
 #define BOOST_THREAD_DELETE_COPY_CTOR(CLASS) \
     private: \
       CLASS(CLASS const &); \             // <--- HERE
     public:

 #define BOOST_THREAD_DELETE_COPY_ASSIGN(CLASS) \
     private: \
       CLASS& operator=(CLASS const &); \  // <--- HERE
     public:

 }}}


 This compiles for me.
 (I just can't run it right now because it requires recompiling
 boost.thread)

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/8674#comment:9>
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