...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::filter::default_filter — Default filter, always returns true
.
// In header: <boost/log/expressions/filter.hpp>
// Default filter, always returns true
.
struct default_filter {
// types
typedef bool result_type;
// public member functions
result_type operator()(attribute_value_set const &) const;
};