for (int f : fibonacci() | rv::take(10)) std::cout << f << ' ';
auto result = std::vector1,2,3,4,5 | rv::filter([](int x) return x%2==0; ) | rv::transform([](int x) return x*x; ); // result = 4, 16 c++2019
If you’re still writing new / delete or raw loops with index variables, . Embrace it. “C++20 feels like a new language – but still C++.” – Bjarne Stroustrup for (int f : fibonacci() | rv::take(10)) std::cout
No more messy iterator pairs; lazy evaluation and chaining. generator<int> fibonacci() int a = 0, b = 1; while (true) co_yield a; // suspend and return a auto next = a + b; a = b; b = next; auto result = std::vector1