...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::swap — External swap.
// In header: <boost/log/utility/string_literal.hpp> template<typename CharT, typename TraitsT> constexpr void swap(basic_string_literal< CharT, TraitsT > & left, basic_string_literal< CharT, TraitsT > & right);