创建一个boost :: asio定时器的std :: vector会使编译失败

Coliru上的GCC 4.7.3和4.8.0都无法编译以下代码 . 看起来 asio 计时器不可移动：

#include <vector>
#include <chrono>
#include <boost/asio.hpp>
#include <boost/asio/system_timer.hpp>

int main() {
    boost::asio::io_service io;    
    boost::asio::system_timer t{io}; // works
    std::vector<boost::asio::system_timer> timers;
    timers.emplace_back(io); // timer cannot be constrcuted in place
    timers.push_back(std::move(t)); // cannot be moved as well
}

你知道创建定时器矢量的原因和方法吗？在我的例子中，一种解决方案是使用唯一指针的向量，但我更愿意避免这种情况 .

编译器的错误是：

在/ usr / include / c /4.8/vector:62:0中包含的文件中，来自main.cpp：1：
/ usr / include / c /4.8/bits/stl_construct.h：实例化'void std :: _ Construct（T1 *， Args && ...）[with _T1 = boost :: asio :: basic_waitable_timer _Args = {boost :: asio :: basic_waitable_timer，boost :: asio :: waitable_timer_service >>]}'：/ usr / include / c /4.8/bits/stl_uninitialized.h:75:53：从'static ForwardIterator std :: _ uninitialized_copy <TrivialValueTypes>中需要： ：_uninit_copy（_InputIterator，_InputIterator，_ForwardIterator）[with _InputIterator = std :: move_iterator *> _ForwardIterator = boost :: asio :: basic_waitable_timer *; bool _TrivialValueTypes = false]'/ usr / include / c /4.8/bits/stl_uninitialized.h:117:41：需要'_ForwardIterator std :: uninitialized_copy（_InputIterator，_InputIterator，_ForwardIterator）[with _InputIterator = std :: move_iterator *> _ForwardIterator = boost :: asio :: basic_waitable_timer *]'/ usr / include / c /4.8/bits/stl_uninitialized.h:258:63：来自'ForwardIterator std :: _ uninitialized_copy_a（_InputIterator，_InputIterator，_ForwardIterator，std :: allocator） <_Tp>＆）[with _InputIterator = std :: move_iterator *> _ForwardIterator = boost :: asio :: basic_waitable_timer *; _Tp = boost :: asio :: basic_waitable_timer]'/ usr / include / c /4.8/bits/stl_uninitialized.h:281:69：需要'ForwardIterator std :: _ uninitialized_move_if_noexcept_a（_InputIterator，_InputIterator，_ForwardIterator，_Allocator＆）[with _InputIterator = boost :: asio :: basic_waitable_timer *; _ForwardIterator = boost :: asio :: basic_waitable_timer *; _Allocator = std :: allocator]'/ usr / include / c /4.8/bits/vector.tcc:415:43：需要'void std :: vector <Tp，Alloc> :: _ M_emplace_back_aux（ Args && ...）[ with _Args = {boost :: asio :: io_service＆}; _Tp = boost :: asio :: basic_waitable_timer _Alloc = std :: allocator]'/ usr / include / c /4.8/bits/vector.tcc:101:54：从'void std :: vector <Tp，Alloc>中需要： ：emplace_back（ Args && ...）[with _Args = {boost :: asio :: io_service＆}; _Tp = boost :: asio :: basic_waitable_timer _Alloc = std :: allocator]'main.cpp：10：27：从这里需要/ usr / include / c /4.8/bits/stl_construct.h:75:7：错误：使用删除函数'boost :: asio :: basic_waitable_timer :: basic_waitable_timer（boost :: asio :: basic_waitable_timer &&）'{:: new（static_cast <void *>（ p））T1（std :: forward <Args>（ args） ...）; }

^
在/usr/local/include/boost/asio.hpp:33:0中包含的文件中，来自main.cpp：3：
/usr/local/include/boost/asio/basic_waitable_timer.hpp:127:7：注意：'boost :: asio :: basic_waitable_timer :: basic_waitable_timer（boost :: asio :: basic_waitable_timer &&）'被隐式删除，因为默认定义会形象不对：class basic_waitable_timer ^
在/usr/local/include/boost/asio/basic_socket.hpp:20:0中包含的文件中，来自/usr/local/include/boost/asio/basic_datagram_socket.hpp:20，

来自/usr/local/include/boost/asio.hpp:21，

来自main.cpp：3：
/usr/local/include/boost/asio/basic_io_object.hpp:163:3：错误：'boost :: asio :: basic_io_object :: basic_io_object（const boost :: asio :: basic_io_object＆）[with IoObjectService = boost :: asio :: waitable_timer_service> bool Movable = false]'是私有的basic_io_object（const basic_io_object＆）; ^在/usr/local/include/boost/asio.hpp:33:0中包含的文件中，来自main.cpp：3：
/usr/local/include/boost/asio/basic_waitable_timer.hpp:127:7：错误：在此上下文类basic_waitable_timer中^