What are the best practices for using C++20 ranges?

What are the best practices for using C++20 ranges?

When using C++20 ranges, it's best to keep your code readable and maintainable. Use views for lazy evaluation and avoid unnecessary copies.

Can you give an example of using ranges with algorithms?

Sure! You can use std::views::filter to filter elements and std::ranges::sort to sort them. For example:

#include <ranges>
#include <vector>
#include <algorithm>

std::vector<int> numbers = {5, 3, 8, 1, 2};

auto filtered = numbers | std::views::filter([](int n) { return n > 2; });
std::ranges::sort(filtered);

What are some common pitfalls to avoid?

Common pitfalls include not understanding the difference between views and containers, which can lead to performance issues. Also, be cautious with lifetime management of temporary objects.

How do ranges improve code readability?

Ranges allow for a more declarative style of programming, making it clearer what operations are being performed on the data, thus improving readability.