Method next

example/multi-threaded-client.cpp:44–49

    RoundRobin(Iterator begin, std::size_t size) : begin_(begin), size_(size) {}

    decltype(auto) next()
    {
        const auto cur = current_.fetch_add(1, std::memory_order_relaxed);
        const auto pos = cur % size_;
        return *std::next(begin_, static_cast<std::ptrdiff_t>(pos));
    }

  private:
    Iterator begin_;