What are unique pointers in C++ and how can I use them effectively?

What are unique pointers in C++ and how can I use them effectively?

Unique pointers are smart pointers that ensure a single ownership of a dynamically allocated object. They automatically manage memory, preventing leaks.

Can you explain how to transfer ownership of a unique pointer?

Certainly! You can transfer ownership using the std::move function, which allows you to move the unique pointer to another unique pointer.

What happens if I try to copy a unique pointer?

Copying a unique pointer is not allowed because it would violate the unique ownership principle. It will result in a compilation error.

Are there any performance benefits to using unique pointers?

Yes, unique pointers can improve performance by eliminating the overhead of reference counting found in shared pointers, making them faster for single ownership scenarios.

Can you give an example of using unique pointers in a function?

Sure! Here's a simple example:

#include <memory>

void process(std::unique_ptr<MyClass> ptr) {
    // Use ptr
}

int main() {
    std::unique_ptr<MyClass> myPtr = std::make_unique<MyClass>();
    process(std::move(myPtr));
}