...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::expressions::channel_severity_filter — This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
// In header: <boost/log/expressions/predicates/channel_severity_filter.hpp> template<typename ChannelT, typename SeverityT, typename SeverityCompareT, typename ChannelOrderT> channel_severity_filter_actor< ChannelT, SeverityT, fallback_to_none, fallback_to_none, ChannelOrderT, SeverityCompareT > channel_severity_filter(attribute_name const & channel_name, attribute_name const & severity_name, SeverityCompareT const & severity_compare, ChannelOrderT const & channel_order);