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 <vector>
#include <list>
#include <set>
#include <ranges>
int main()
{
std::vector data{47, 11, 42, 0, 8, 15};
std::vector<int> v1{data.begin(), data.end()};
std::println("v1: {}", v1); // OK
std::vector v2{data.begin(), data.end()};
std::println("v2: {}", v2); // ERROR: elements are iterators
std::vector v3(data.begin(), data.end()); // OK (note: parentheses)
std::println("v3: {}", v3);
std::vector v4{std::from_range, data}; // OK
std::println("v4: {}", v4);
auto vPrimes = std::views::iota(1, 100) // values from 1 to 99
| std::views::filter(isPrime) // only prime numbers
| std::views::take(10); // at most 10
std::vector<int> v5{vPrimes.begin(), vPrimes.end()}; // ERROR: no common range
std::vector<int> v6{std::from_range, vPrimes}; // OK
std::println("v6: {}", v6);
}