...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::add_scoped_logger_attribute
// In header: <boost/log/attributes/scoped_attribute.hpp> template<typename LoggerT> unspecified add_scoped_logger_attribute(LoggerT & l, attribute_name const & name, attribute const & attr);