lib/spanprint.hpp

The following code example is taken from the book
C++20 - The Complete Guide by Nicolai M. Josuttis, Leanpub, 2021
The code is licensed under a Creative Commons Attribution 4.0 International License.

---

// raw code

#ifndef SPANPRINT_HPP
#define SPANPRINT_HPP

#include <iostream>
#include <span>

template<typename T, std::size_t Sz>
void printSpan(std::span<T, Sz> sp)
{
  std::cout << '[' << sp.size() << " elems";
  if constexpr (Sz == std::dynamic_extent) {
    std::cout << " (dynamic)";
  }
  else {
    std::cout << " (fixed)";
  }
  std::cout << ':';
  for (const auto& elem : sp) {
    std::cout << ' ' << elem;
  }
  std::cout << "]\n";
}

#endif // SPANPRINT_HPP