[Boost-bugs] [Boost C++ Libraries] #6170: boost::move conflicts in thread upgrade mutexes (1.48.0)

Subject: [Boost-bugs] [Boost C++ Libraries] #6170: boost::move conflicts in thread upgrade mutexes (1.48.0)
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-11-23 23:59:56

#6170: boost::move conflicts in thread upgrade mutexes (1.48.0)
----------------------------------+-----------------------------------------
 Reporter:  nathan@…              |       Owner:  anthonyw  
     Type:  Bugs                  |      Status:  new       
Milestone:  To Be Determined      |   Component:  thread    
  Version:  Boost 1.48.0          |    Severity:  Regression
 Keywords:                        |  
----------------------------------+-----------------------------------------
 Due to the new boost::move package, you can no longer use upgradeable
 locks and unordered_map at the same time, you get ambiguous function
 names:

 Compiling the file:
 {{{
 #include <boost/thread/shared_mutex.hpp>
 #include <boost/thread/locks.hpp>

 // Including this will cause ambiguous errors in boost::move
 #include <boost/unordered_map.hpp>

 using namespace boost;

 typedef upgrade_lock<shared_mutex> auto_upgrade_lock;
 typedef upgrade_to_unique_lock<shared_mutex> auto_upgrade_unique_lock;

 void testUpgrade(void);

 void testUpgrade(void)
 {
         shared_mutex            mtx;
         auto_upgrade_lock       lock(mtx);
         // Do some read-only stuff

         auto_upgrade_unique_lock writeLock(lock);
         // Do some write-only stuff with the upgraded lock
 }
 }}}

 Yields the following error:
 {{{
 boost/thread/locks.hpp: In constructor
 ‘boost::upgrade_to_unique_lock<Mutex>::upgrade_to_unique_lock(boost::upgrade_lock<Mutex>&)
 [with Mutex = boost::shared_mutex]’:
 test.cpp:23:   instantiated from here
 boost/thread/locks.hpp:926: error: call of overloaded
 ‘move(boost::upgrade_lock<boost::shared_mutex>&)’ is ambiguous
 boost/thread/detail/move.hpp:44: note: candidates are: typename
 boost::enable_if<boost::is_convertible<T&, boost::detail::thread_move_t<T>
 >, boost::detail::thread_move_t<T> >::type boost::move(T&) [with T =
 boost::upgrade_lock<boost::shared_mutex>]
 boost/move/move.hpp:294: note:                 typename
 boost::move_detail::disable_if<boost::has_move_emulation_enabled<T>,
 T&>::type boost::move(T&) [with T =
 boost::upgrade_lock<boost::shared_mutex>]
 boost/thread/locks.hpp: In destructor
 ‘boost::upgrade_to_unique_lock<Mutex>::~upgrade_to_unique_lock() [with
 Mutex = boost::shared_mutex]’:
 test.cpp:23:   instantiated from here
 boost/thread/locks.hpp:932: error: call of overloaded
 ‘move(boost::unique_lock<boost::shared_mutex>&)’ is ambiguous
 boost/thread/detail/move.hpp:44: note: candidates are: typename
 boost::enable_if<boost::is_convertible<T&, boost::detail::thread_move_t<T>
 >, boost::detail::thread_move_t<T> >::type boost::move(T&) [with T =
 boost::unique_lock<boost::shared_mutex>]
 boost/move/move.hpp:294: note:                 typename
 boost::move_detail::disable_if<boost::has_move_emulation_enabled<T>,
 T&>::type boost::move(T&) [with T =
 boost::unique_lock<boost::shared_mutex>]
 }}}

 Compiling using 1.48.0 on OSX.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/6170>
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