Constructor inheritance

constructor

#include <vector>
#include <iostream>

template <typename Iterator>
struct range: public std::pair<Iterator, Iterator>
{
  using Parent = std::pair<Iterator, Iterator>;
  template <typename... Arg> range(Arg&& ... arg): Parent(std::forward<Arg>(arg) ...) {}

  Iterator begin() { return this->first; }
  Iterator end() { return this->second; }
};

template <typename Iterator>
range<Iterator> make_range(Iterator a, Iterator b) { return range<Iterator>(a, b); }

int main()
{
  std::vector<int> input{1, 2, 3, 4, 5, 6};
  auto range = make_range(input.cbegin(), input.cbegin() + 3);
  for (auto& x: range) std::cout << x << ","; std::cout << std::endl;

  return 0;
}