Construct a serial_port
on an existing native serial port.
serial_port( asio::io_context & io_context, const native_handle_type & native_serial_port);
This constructor creates a serial port object to hold an existing native serial port.
The io_context
object that the serial port will use to dispatch handlers for any
asynchronous operations performed on the port.
A native serial port.
Thrown on failure.