How do I handle errors in C++20 coroutines?

How do I handle errors in C++20 coroutines?

In C++20, you can handle errors in coroutines using exceptions or by returning a special error type. Would you like examples?

Yes, please provide an example using exceptions.

Sure! You can use co_await with a function that throws an exception. Here's a simple example:

co_await someCoroutine();

If someCoroutine throws, it will propagate the exception. Do you want to see how to catch it?

Yes, how can I catch exceptions in a coroutine?

You can catch exceptions in the coroutine using a try-catch block. For example:

try {
    co_await someCoroutine();
} catch (const std::exception& e) {
    // Handle the error
}

This way, you can manage errors gracefully.

What about using an error type instead of exceptions?

You can define a custom error type and return it from your coroutine. This allows you to handle errors without exceptions. Would you like to see a code example?