What is a unique_ptr in C++?

What is a unique_ptr in C++?

A unique_ptr is a smart pointer in C++ that ensures exclusive ownership of a dynamically allocated object.

How does unique_ptr differ from a regular pointer?

Unlike regular pointers, unique_ptr automatically manages memory, preventing memory leaks by deleting the object when it goes out of scope.

Can I transfer ownership of a unique_ptr?

Yes, you can transfer ownership using the std::move function, which allows one unique_ptr to take over the resource from another.

Are there any downsides to using unique_ptr?

One downside is that unique_ptr cannot be copied, only moved, which can complicate certain designs.

When should I use unique_ptr instead of shared_ptr?

Use unique_ptr when you want sole ownership of an object, and shared_ptr when multiple owners are needed.