Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

Get an option from the serial port.

template<
    typename GettableSerialPortOption>
void get_option(
    GettableSerialPortOption & option,
    boost::system::error_code & ec) const;

This function is used to get the current value of an option on the serial port.