How do I handle errors in async programming with C++?

How do I handle errors in async programming with C++?

In C++, you can handle errors in async programming using try-catch blocks within your async functions. This allows you to catch exceptions that may occur during the execution of asynchronous tasks.

Can you give me an example of using try-catch in an async function?

Sure! Here's a simple example:

#include <future>
#include <iostream>
#include <stdexcept>

int asyncFunction() {
    throw std::runtime_error("An error occurred!");
}

int main() {
    auto future = std::async(std::launch::async, asyncFunction);
    try {
        future.get();
    } catch (const std::exception& e) {
        std::cout << "Caught exception: " << e.what() << std::endl;
    }
    return 0;
}

What if I want to handle multiple errors?

You can catch multiple exceptions by using multiple catch blocks. For example:

try {
    future.get();
} catch (const std::runtime_error& e) {
    std::cout << "Runtime error: " << e.what() << std::endl;
} catch (const std::exception& e) {
    std::cout << "General exception: " << e.what() << std::endl;
}

Are there any best practices for error handling in async C++?

Yes, some best practices include using specific exception types, logging errors, and ensuring that resources are properly released in case of an error.