Function append

libraries/lib-cloud-audiocom/OAuthService.cpp:96–101

template<typename Elem, typename First, typename ...Others>
void append(std::basic_string<Elem>& dest, First&& first, Others&& ...others)
{
   dest.append(first);
   if constexpr (sizeof...(others) != 0)
      append(dest, std::forward<Others>(others)...);
}

template<typename First, typename ...Others>
auto concat(First&& first, Others&& ...others)