What is exception safety in C++?

What is exception safety in C++?

Exception safety in C++ refers to the guarantees that a function provides regarding its behavior when exceptions are thrown.

Can you explain the different levels of exception safety?

Sure! The three main levels are: no-throw guarantee, strong guarantee, and basic guarantee.

What is the no-throw guarantee?

The no-throw guarantee means that a function will not throw any exceptions, ensuring that the program remains in a valid state.

How does the strong guarantee differ from the basic guarantee?

The strong guarantee ensures that if an exception is thrown, the state of the program remains unchanged, while the basic guarantee only ensures that some changes may occur, but the program will still be in a valid state.

Can you give an example of a function with strong exception safety?

Certainly! A function that uses a copy-and-swap idiom for resource management typically provides strong exception safety.