Synopsis

Defined in header <boost/static_string/static_string.hpp>

template<
    std::size_t N,
    std::size_t M,
    typename CharT,
    typename Traits>
constexpr basic_static_string< N+M, CharT, Traits >
operator+(
    const basic_static_string< N, CharT, Traits >& lhs,
    const basic_static_string< M, CharT, Traits >& rhs);

Convenience header <boost/static_string.hpp>