What are some examples of RAII in C++?

What are some examples of RAII in C++?

RAII stands for Resource Acquisition Is Initialization. It ensures that resources are properly released when they go out of scope. A common example is using smart pointers like std::unique_ptr and std::shared_ptr.

Can you explain how std::unique_ptr works?

Sure! std::unique_ptr is a smart pointer that owns a dynamically allocated object. It ensures that the object is deleted when the unique_ptr goes out of scope, preventing memory leaks.

What happens if I try to copy a std::unique_ptr?

You cannot copy a std::unique_ptr because it is designed to have a single owner. If you try to copy it, you'll get a compilation error. You can, however, transfer ownership using std::move.

Are there any other RAII examples in C++?

Yes! Other examples include file handling with std::ifstream and std::ofstream, which automatically close files when they go out of scope.