Filling vector while skipping values

fill_skipping.cpp

#include <iostream>
#include <set>
#include <vector>


void fill_skipping(std::vector<size_t>& result,
    std::set<size_t>& skip) {

  auto p_skip = skip.begin();
  auto p_result = result.begin();

  size_t value = 0;
  while (p_result != result.end()) {
    if (value != *p_skip) {
      *p_result++ = value;
    } else {
      *p_skip++;
    }
    ++value;
  }
}


int main() {

  size_t max = 30;
  std::set<size_t> skip{9, 7, 5, 3, 1}; // This is ordered upon initialization
  std::vector<size_t> result(max - skip.size());

  fill_skipping(result, skip);
  std::cout << "\nValues: ";
  for (auto&x : result) std::cout << x << " ";
  std::cout << "\nSize: " << result.size() << "\n";

  // Output will be
  // Values: 0 2 4 6 8 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
  // Size: 25

}