mdspan/print3d.hpp

The following code example is taken from the book
C++23 - The Complete Guide by Nicolai M. Josuttis, Leanpub, 2026
The code is licensed under a Creative Commons Attribution 4.0 International License.

---

// raw code

#include <print>

void print3D(const auto& mds)
{
  std::print("3D mdspan ({}*{}*{}):\n", mds.extent(0), mds.extent(1),
                                        mds.extent(2));  
  for(std::size_t i = 0; i < mds.extent(0); ++i) {
    std::print("  ");
    for(std::size_t j = 0; j < mds.extent(1); ++j) {
      for(std::size_t k = 0; k < mds.extent(2); ++k) {
        std::print("{} ", mds[i, j, k]);
      }
      std::print("\n  ");
    }
    std::print("\n");
  }
}