make some types movable (#885)

include/libtorrent/session.hpp

@@ -117,21 +117,16 @@ namespace libtorrent
 	public:
 		// default constructor, does not refer to any session
 		// implementation object.
-		session_proxy() {}
+		session_proxy();
 		~session_proxy();
-#if __cplusplus >= 201103L
-		session_proxy(session_proxy const&) = default;
-		session_proxy& operator=(session_proxy const&) = default;
-#endif
+		session_proxy(session_proxy const&);
+		session_proxy& operator=(session_proxy const&);
 	private:
 		session_proxy(
 			boost::shared_ptr<io_service> ios
 			, std::shared_ptr<std::thread> t
-			, boost::shared_ptr<aux::session_impl> impl)
-			: m_io_service(ios)
-			, m_thread(t)
-			, m_impl(impl)
-		{}
+			, boost::shared_ptr<aux::session_impl> impl);
+
 		boost::shared_ptr<io_service> m_io_service;
 		std::shared_ptr<std::thread> m_thread;
 		boost::shared_ptr<aux::session_impl> m_impl;
@@ -149,7 +144,7 @@ namespace libtorrent
 	// the settings to be set and pass it in to ``session::apply_settings()``.
 	// 
 	// see apply_settings().
-	class TORRENT_EXPORT session: public boost::noncopyable, public session_handle
+	class TORRENT_EXPORT session : public session_handle
 	{
 	public:
 
@@ -172,6 +167,14 @@ namespace libtorrent
 			start(flags, pack, nullptr);
 		}
 
+		// moveable
+		session(session&&) = default;
+		session& operator=(session&&) = default;
+
+		// noncopyable
+		session(session const&) = delete;
+		session& operator=(session const&) = delete;
+
 		// overload of the constructor that takes an external io_service to run
 		// the session object on. This is primarily useful for tests that may want
 		// to run multiple sessions on a single io_service, or low resource

include/libtorrent/session_handle.hpp

@@ -69,6 +69,14 @@ namespace libtorrent
 			: m_impl(impl)
 		{}
 
+		// moveable
+		session_handle(session_handle&&) = default;
+		session_handle& operator=(session_handle&&) = default;
+
+		// non copyable
+		session_handle(session_handle const&) = delete;
+		session_handle& operator=(session_handle const&) = delete;
+
 		bool is_valid() const { return m_impl != nullptr; }
 
 		// TODO: 2 the ip filter should probably be saved here too

include/libtorrent/torrent_handle.hpp

@@ -248,12 +248,10 @@ namespace libtorrent
 		// i.e. is_valid() will return false.
 		torrent_handle() {}
 
-		torrent_handle(torrent_handle const& t)
-		{ if (!t.m_torrent.expired()) m_torrent = t.m_torrent; }
-
-#if __cplusplus >= 201103L
+		torrent_handle(torrent_handle const& t) = default;
+		torrent_handle(torrent_handle&& t) = default;
 		torrent_handle& operator=(torrent_handle const&) = default;
-#endif
+		torrent_handle& operator=(torrent_handle&&) = default;
 
 		// flags for add_piece().
 		enum flags_t { overwrite_existing = 1 };

src/session.cpp

@@ -398,6 +398,16 @@ namespace libtorrent
 	session_settings::~session_settings() {}
 #endif // TORRENT_NO_DEPRECATE
 
+	session_proxy::session_proxy() = default;
+	session_proxy::session_proxy(boost::shared_ptr<io_service> ios
+		, std::shared_ptr<std::thread> t
+		, boost::shared_ptr<aux::session_impl> impl)
+		: m_io_service(ios)
+		, m_thread(t)
+		, m_impl(impl)
+	{}
+	session_proxy::session_proxy(session_proxy const&) = default;
+	session_proxy& session_proxy::operator=(session_proxy const&) = default;
 	session_proxy::~session_proxy()
 	{
 		if (m_thread && m_thread.unique())