How does error handling work in C++20's std::format?

Can you explain how error handling works in C++20's std::format?

Sure! In C++20, std::format provides a way to format strings with error handling through exceptions. If the format string is invalid, it throws a std::format_error.

What kind of errors can I expect when using std::format?

You might encounter errors like mismatched types, invalid format specifiers, or exceeding the buffer size. Each of these will trigger a std::format_error.

How can I catch these errors in my code?

You can use a try-catch block around your std::format call. Catch the std::format_error to handle formatting issues gracefully.

Can you give me a code example of this?

Certainly! Here's a simple example:

try {
    std::string result = std::format("Hello, {}!", 42);
} catch (const std::format_error& e) {
    std::cerr << "Formatting error: " << e.what() << '\n';
}