...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_terminal::channel_visitor — Channel visitor.
// In header: <boost/log/expressions/predicates/channel_severity_filter.hpp> // Channel visitor. template<typename ArgT> struct channel_visitor { // types typedef void result_type; // construct/copy/destruct channel_visitor(channel_severity_filter_terminal const &, ArgT, bool &); // public member functions result_type operator()(channel_value_type const &) const; };