...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::invoke_manipulator
// In header: <boost/log/utility/manipulators/invoke.hpp> template<typename FunctionT> class invoke_manipulator { public: // construct/copy/destruct explicit invoke_manipulator(FunctionT const &); explicit invoke_manipulator(FunctionT &&); // public member functions template<typename StreamT> void output(StreamT &) const; };