Function fill_n

uspace/lib/cpp/include/__bits/algorithm.hpp:536–540

    template<class InputIterator, class Size, class T>
    void fill_n(InputIterator first, Size count, const T& value)
    {
        for (Size i = 0; i < count; ++i)
            *first++ = value;
    }

    /**
     * 25.3.7, generate: