Class unified_array

less_slow.cpp:3300–3316

 */
template <typename type_>
class unified_array {
    type_ *data_ = nullptr;
    std::size_t size_ = 0;

  public:
    unified_array(std::size_t size) : size_(size) {
        if (cudaMallocManaged(&data_, sizeof(type_) * size_) != cudaSuccess) throw std::bad_alloc();
    }

    ~unified_array() noexcept { cudaFree(data_); }

    type_ *begin() const noexcept { return data_; }
    type_ *end() const noexcept { return data_ + size_; }
    type_ &operator[](std::size_t index) noexcept { return data_[index]; }
    type_ operator[](std::size_t index) const noexcept { return data_[index]; }
    std::size_t size() const noexcept { return size_; }
};

template <typename>
struct dependent_false : std::false_type {};