...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::attributes::constant::impl — Factory implementation.
// In header: <boost/log/attributes/constant.hpp> // Factory implementation. class impl : public attribute_value_impl< value_type > { public: // construct/copy/destruct explicit impl(value_type const &); explicit impl(value_type &&) noexcept(boost::is_nothrow_move_constructible< value_type >::value)); };