What are the best practices for using unique_ptr in C++17?

What are the best practices for using unique_ptr in C++17?

In C++17, best practices for using unique_ptr include ensuring proper ownership semantics, avoiding raw pointers, and using make_unique for allocation.

Can you explain why make_unique is preferred over new?

Certainly! make_unique prevents memory leaks by ensuring that the unique_ptr takes ownership of the allocated memory, and it also avoids potential exceptions that can occur with new.

Are there any performance considerations I should be aware of?

Yes, using unique_ptr generally has minimal overhead compared to raw pointers, but be cautious with unnecessary copies. Always prefer move semantics.

What about using unique_ptr with arrays?

For arrays, use unique_ptr with a custom deleter or consider using std::unique_ptr<T[]> to manage array memory safely.

Can unique_ptr be used with polymorphism?

Absolutely! You can use unique_ptr with base class pointers to manage derived class objects, ensuring proper cleanup.