...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::log::sources::swap
// In header: <boost/log/sources/basic_logger.hpp> template<typename CharT, typename FinalT, typename ThreadingModelT> void swap(basic_logger< CharT, FinalT, ThreadingModelT > & left, basic_logger< CharT, FinalT, ThreadingModelT > & right);