ranges/adjacentfatal.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 <print>
#include <string>
#include <vector>
#include <ranges>

std::vector<std::string> getColl()
{
  return {"tic", "tac", "toe"};
}

int main()
{
  std::println("{}", getColl());                          // OK

  auto vec = getColl() | std::views::adjacent<2>          // FATAL ERROR
                       | std::views::transform(std::identity{})
                       | std::ranges::to<std::vector>();
  std::println("{}", vec);
}