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#### basic_serial_port::lowest_layer_type

A basic_basic_serial_port is always the lowest layer.

    typedef basic_serial_port lowest_layer_type;

###### Types

Name | Description
--- | ---
executor_type | The type of the executor associated with the object.
lowest_layer_type | A basic_basic_serial_port is always the lowest layer.
native_handle_type | The native representation of a serial port.

###### Member Functions

Name | Description
--- | ---
assign | Assign an existing native serial port to the serial port.
async_read_some | Start an asynchronous read.
async_write_some | Start an asynchronous write.
basic_serial_port | Construct a basic_serial_port without opening it. — Construct and open a basic_serial_port. — Construct a basic_serial_port on an existing native serial port. — Move-construct a basic_serial_port from another.
cancel | Cancel all asynchronous operations associated with the serial port.
close | Close the serial port.
get_executor | Get the executor associated with the object.
get_option | Get an option from the serial port.
is_open | Determine whether the serial port is open.
lowest_layer | Get a reference to the lowest layer. — Get a const reference to the lowest layer.
native_handle | Get the native serial port representation.
open | Open the serial port using the specified device name.
operator= | Move-assign a basic_serial_port from another.
read_some | Read some data from the serial port.
send_break | Send a break sequence to the serial port.
set_option | Set an option on the serial port.
write_some | Write some data to the serial port.
~basic_serial_port | Destroys the serial port.

The `basic_serial_port` class provides a wrapper over serial port functionality.

###### Thread Safety

Distinct objects: Safe.

Shared objects: Unsafe.

###### Requirements

Header: `boost/asio/basic_serial_port.hpp`

Convenience header: `boost/asio.hpp`