template< typename ConstBufferSequence, typename WriteHandler> void-or-deduced async_send_to( const ConstBufferSequence & buffers, const endpoint_type & destination, WriteHandler handler); » more... template< typename ConstBufferSequence, typename WriteHandler> void-or-deduced async_send_to( const ConstBufferSequence & buffers, const endpoint_type & destination, socket_base::message_flags flags, WriteHandler handler); » more...