When should I use weak_ptr in C++11?

When should I use weak_ptr in C++11?

You should use weak_ptr in C++11 when you want to avoid circular references between shared_ptr instances.

Can you explain how weak_ptr helps with circular references?

Sure! weak_ptr allows you to reference an object managed by shared_ptr without increasing its reference count, preventing cycles.

Are there any performance implications of using weak_ptr?

Yes, using weak_ptr can introduce some overhead due to the need to manage the weak reference count, but it's generally minimal.

Can you give me an example of using weak_ptr?

Certainly! Here's a simple example: if you have two objects that reference each other, use weak_ptr for one to break the cycle.