What are the best practices for handling exceptions in C++20?

What are the best practices for handling exceptions in C++20?

In C++20, it's important to use exceptions judiciously. Best practices include using std::exception for custom exceptions, ensuring exception safety in your code, and using noexcept where appropriate.

Can you explain what exception safety means?

Exception safety refers to the guarantees that your code provides when an exception is thrown. There are three levels: no-throw guarantee, strong guarantee, and basic guarantee.

What is the difference between strong and basic exception guarantees?

The strong guarantee ensures that if an exception is thrown, the program state remains unchanged. The basic guarantee ensures that resources are released, but the state may be partially modified.

How can I implement custom exceptions in C++20?

You can implement custom exceptions by inheriting from std::exception and overriding the what() method to provide a custom error message.