What is exception safety in modern C++?

What is exception safety in modern C++?

Exception safety refers to the guarantees that a function provides about its state when an exception is thrown. In modern C++, there are different levels of exception safety: no-throw, basic, strong, and nothrow.

Can you explain the different levels of exception safety?

Sure! The levels are: 1. No-throw: guarantees that no exceptions will be thrown. 2. Basic: guarantees that if an exception is thrown, the program will be in a valid state. 3. Strong: guarantees that if an exception is thrown, the program will remain unchanged. 4. Nothrow: guarantees that the function will not throw exceptions.

How can I implement strong exception safety in my code?

To implement strong exception safety, you can use techniques like copy-and-swap idiom, which ensures that if an exception occurs, the original object remains unchanged.

Are there any best practices for exception handling in C++?

Yes, some best practices include using RAII (Resource Acquisition Is Initialization), avoiding exceptions for control flow, and ensuring that destructors are exception-safe.