What are some examples of C++20 features?

What are some examples of C++20 features?

C++20 introduced several new features like concepts, ranges, and coroutines. Would you like to know more about a specific feature?

Can you explain concepts in C++20?

Sure! Concepts are a way to specify template requirements. They allow you to define constraints on template parameters, making your code more readable and easier to debug.

What about ranges? How do they work?

Ranges provide a new way to work with sequences of elements. They allow you to write more expressive and concise code for operations like filtering and transforming collections.

Can you give me a code example using coroutines?

Absolutely! Here's a simple coroutine example that generates Fibonacci numbers:

#include <iostream>
#include <coroutine>

struct Fibonacci {
    struct promise_type {
        int current = 0, next = 1;
        auto get_return_object() { return Fibonacci{}; }
        auto initial_suspend() { return std::suspend_always{}; }
        auto final_suspend() noexcept { return std::suspend_always{}; }
        void unhandled_exception() {}
        auto yield_value(int value) {
            current = value;
            return std::suspend_always{};
        }
    };

    int operator()() {
        return current;
    }
};

Fibonacci fib;
for (int i = 0; i < 10; ++i) {
    std::cout << fib() << " ";
}

This will generate the first 10 Fibonacci numbers.