Class base_virtual_class

less_slow.cpp:4073–4077

#include <memory> // `std::unique_ptr`

class base_virtual_class {
  public:
    virtual ~base_virtual_class() = default;
    virtual void process(std::vector<std::uint64_t> &data) const = 0;
};

class for_range_virtual : public base_virtual_class {
    std::uint64_t start_, end_;