What is a weak_ptr in C++?

Can you explain what a weak_ptr is in C++?

Sure! A weak_ptr is a smart pointer in C++ that holds a non-owning reference to an object managed by a shared_ptr.

How does weak_ptr help with memory management?

It helps prevent circular references that can lead to memory leaks by allowing you to reference an object without owning it.

When should I use weak_ptr instead of shared_ptr?

Use weak_ptr when you need to observe an object managed by shared_ptr without affecting its lifetime.

Can you give an example of using weak_ptr?

Certainly! Here's a simple example: if you have a parent-child relationship, the parent can hold a shared_ptr to the child, while the child can hold a weak_ptr to the parent.