What are coroutines in C++?

What are coroutines in C++?

Coroutines in C++ are a generalization of subroutines that allow you to pause and resume execution, enabling asynchronous programming.

How do I define a coroutine in C++?

You can define a coroutine using the co_await, co_yield, and co_return keywords. Here's a simple example:

#include <iostream>
#include <coroutine>

struct Coroutine {
    struct promise_type {
        Coroutine get_return_object() { return {}; }
        std::suspend_never initial_suspend() { return {}; }
        std::suspend_always final_suspend() noexcept { return {}; }
        void unhandled_exception() {}
        void return_void() {}
    };
};

Coroutine myCoroutine() {
    co_return;
}

What are the benefits of using coroutines?

Coroutines simplify asynchronous programming by allowing you to write code that looks synchronous, making it easier to read and maintain.

Can coroutines be used for parallel programming?

Yes, coroutines can be used for parallel programming, especially when combined with tasks and thread pools to manage concurrent operations.