Fix warnings in Clang.

examples/file_server/file_socket.cpp

@@ -18,7 +18,12 @@ file_socket::file_socket(i_server& server_) : server_socket(server_) {}
 file_socket::~file_socket() {clear();}
 
 void file_socket::reset() {trans_end(); server_socket::reset();}
-void file_socket::take_over(std::shared_ptr<file_socket> socket_ptr) {if (socket_ptr) printf("restore user data from invalid object (" ASCS_LLF ").\n", socket_ptr->id());}
+
+//socket_ptr actually is a pointer of file_socket, use std::dynamic_pointer_cast to convert it.
+void file_socket::take_over(std::shared_ptr<server_socket::type_of_object_restore> socket_ptr)
+	{printf("restore user data from invalid object (" ASCS_LLF ").\n", socket_ptr->id());}
+//this works too, but brings warnings with -Woverloaded-virtual option.
+//void file_socket::take_over(std::shared_ptr<file_socket> socket_ptr) {printf("restore user data from invalid object (" ASCS_LLF ").\n", socket_ptr->id());}
 
 //msg handling
 bool file_socket::on_msg_handle(out_msg_type& msg) {handle_msg(msg); if (0 == get_pending_recv_msg_size()) recv_msg(); return true;}

examples/file_server/file_socket.h

@@ -18,7 +18,8 @@ public:
 	//because we don't use objects pool(we don't defined ASCS_REUSE_OBJECT), so this virtual function will
 	//not be invoked, and can be omitted, but we keep it for the possibility of using it in the future
 	virtual void reset();
-	virtual void take_over(std::shared_ptr<file_socket> socket_ptr);
+	virtual void take_over(std::shared_ptr<server_socket::type_of_object_restore> socket_ptr);
+//	virtual void take_over(std::shared_ptr<file_socket> socket_ptr); //this works too, but brings warnings with -Woverloaded-virtual option.
 
 protected:
 	//msg handling

include/ascs/ext/socket.h

@@ -220,13 +220,13 @@ public:
 	register_cb(take_over, false)
 
 public:
-	virtual void take_over(std::shared_ptr<Socket> socket_ptr) call_cb_1_void(take_over, socket_ptr)
+	virtual void take_over(std::shared_ptr<typename Socket::type_of_object_restore> socket_ptr) call_cb_1_void(take_over, socket_ptr)
 
 private:
 	void first_init() {cb_take_over.second = true;}
 
 private:
-	std::pair<std::function<void(Socket*, std::shared_ptr<Socket>)>, bool> cb_take_over;
+	std::pair<std::function<void(Socket*, std::shared_ptr<typename Socket::type_of_object_restore>)>, bool> cb_take_over;
 };
 
 }} //namespace

include/ascs/tcp/server_socket.h

@@ -19,6 +19,9 @@ namespace ascs { namespace tcp {
 
 template<typename Socket, typename Server = i_server> class generic_server_socket : public Socket, public std::enable_shared_from_this<generic_server_socket<Socket, Server>>
 {
+public:
+	typedef generic_server_socket<Socket, Server> type_of_object_restore;
+
 private:
 	typedef Socket super;