...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::features — A type sequence of logger features.
// In header: <boost/log/sources/features.hpp> template<typename... FeaturesT> struct features { };
This class template can be used to specify logger features in a basic_composite_logger
instantiation.