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 <iostream>
#include <string>
#include <map>
#include <ranges>
#include <chrono>
int main()
{
std::map<std::string, std::chrono::system_clock::time_point> dates;
dates["now"] = std::chrono::system_clock::now();
for (const auto& [key, val] : dates | std::views::take(5)) {
std::cout << key << ": " << val << '\n';
}
}