What is stack unwinding in C++?

What is stack unwinding in C++?

Stack unwinding in C++ refers to the process of cleaning up the stack when an exception is thrown. It involves calling destructors for all objects that were created in the current scope.

Can you explain how it works with exceptions?

Sure! When an exception occurs, C++ starts unwinding the stack by looking for the nearest catch block. It calls destructors for all local objects in the stack frames that are being exited.

What happens if there are no catch blocks?

If there are no catch blocks to handle the exception, the program will terminate, and the stack will continue to unwind until it reaches the main function.

Are there any best practices for using stack unwinding?

Yes, it's best to use RAII (Resource Acquisition Is Initialization) to manage resources, ensuring that destructors are called automatically during stack unwinding.