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

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

In C++17, it's best to use std::unique_ptr for exclusive ownership and std::shared_ptr for shared ownership. Avoid using raw pointers when possible.

When should I use std::shared_ptr instead of std::unique_ptr?

Use std::shared_ptr when multiple owners need to share the same resource. However, be cautious of circular references.

Can you explain the difference between std::weak_ptr and std::shared_ptr?

std::weak_ptr is used to break circular references created by std::shared_ptr. It allows access to the resource without owning it.

What are some common pitfalls to avoid when using smart pointers?

Common pitfalls include creating circular references with std::shared_ptr, using std::unique_ptr incorrectly, and not managing resource lifetimes properly.