...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::swap — Free swap function.
// In header: <boost/log/utility/value_ref.hpp> template<typename T, typename TagT> void swap(value_ref< T, TagT > & left, value_ref< T, TagT > & right);