id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
6170	boost::move conflicts in thread upgrade mutexes (1.48.0)	nathan@…	Anthony Williams	"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."	Bugs	closed	To Be Determined	thread	Boost 1.48.0	Regression	duplicate		viboes