What are unique pointers in C++ and how do they manage ownership?

What are unique pointers in C++ and how do they manage ownership?

Unique pointers are smart pointers that ensure a single owner for a dynamically allocated object, automatically managing its memory.

Can you explain how to create a unique pointer?

You can create a unique pointer using std::make_unique<T>() or by directly initializing it with std::unique_ptr<T> ptr(new T);.

What happens if I try to copy a unique pointer?

Copying a unique pointer is not allowed; it will result in a compilation error since unique pointers cannot be copied.

How do I transfer ownership of a unique pointer?

You can transfer ownership using std::move(), which allows you to move the unique pointer to another unique pointer.

Are there any performance benefits to using unique pointers?

Yes, unique pointers have lower overhead compared to shared pointers, as they do not require reference counting.