...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::format
// In header: <boost/log/expressions/formatters/format.hpp> template<typename CharT, typename TraitsT, typename AllocatorT> phoenix::actor< format_terminal< CharT > > format(std::basic_string< CharT, TraitsT, AllocatorT > const & fmt);