How can I handle errors in C++14 futures?

What are futures in C++14 and how do they work?

Futures in C++14 are a way to retrieve values from asynchronous operations. They allow you to run tasks in the background and get the result later.

How can I handle errors when using futures?

You can handle errors in futures by using the std::future::get() method, which throws an exception if the asynchronous operation fails.

Can you give me an example of error handling with futures?

Sure! Here's a simple example:

std::future<int> future = std::async([]{ throw std::runtime_error("Error!"); return 42; });
try {
    int result = future.get();
} catch (const std::exception& e) {
    std::cerr << "Caught exception: " << e.what() << std::endl;
}

What types of exceptions can futures throw?

Futures can throw any exception that is thrown by the asynchronous task, including standard exceptions like std::runtime_error or custom exceptions.