...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Defined in header <boost/beast/core/static_string.hpp>
template< std::size_t N, class CharT, class Traits> std::basic_ostream< CharT, Traits >& operator<<( std::basic_ostream< CharT, Traits >& os, static_string< N, CharT, Traits > const& str);