coro/cororectrace.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 <filesystem>
#include <generator>
#include "tracingpmr.hpp"

std::pmr::generator<std::string> allFiles(const std::filesystem::path& p)
{
  if (is_directory(p)) { // if path p is a directory
    // iterate with a coroutine over the subdirectory:
    for (const auto& e : std::filesystem::directory_iterator{p}) {
      co_yield std::ranges::elements_of(allFiles(e.path()));
    }
  }
  else {
    // yield the normalized filename:
    co_yield p.lexically_normal().string();
  }  
}