...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::in_range_fun — The in_range functor.
// In header: <boost/log/utility/functional/in_range.hpp> struct in_range_fun { // types typedef bool result_type; // public member functions template<typename T, typename U> bool operator()(T const &, std::pair< U, U > const &) const; // private static functions template<typename T, typename U> static bool op(T const &, std::pair< U, U > const &, false_type); template<typename T, typename U> static bool op(T const &, std::pair< U, U > const &, true_type); };