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 <vector>
#include <mdspan>
#include "print2d.hpp"
#include "defacc.hpp"
int main()
{
std::vector coll = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12};
// define mdspan with special accessor:
std::mdspan<int, std::dextents<std::size_t, 2>,
std::layout_left,
DefAccessor<int>> mds{coll.data(), coll.size()/3, 3};
print2D(mds);
}