mdspan/mdspanstrideUB4.cpp

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 <ranges>
#include <mdspan>
#include "print2d.hpp"

int main()
{
  std::vector vec{std::from_range, std::views::iota(1, 101)}; // elements from 1 to 100

  // INVALID layout mapping:
  std::mdspan mds{vec.data(),
                  std::layout_stride::mapping{std::extents{4, 5},
                                              std::array{5, 2}}};
  print2D(mds);
}