What are the best practices for using std::optional in C++17?

What are the best practices for using std::optional in C++17?

When using std::optional in C++17, it's best to use it for cases where a value may or may not be present, like function return types.

Can you give me an example of when to use std::optional?

Sure! Use std::optional when a function might not return a value, like searching for an item in a collection that may not exist.

Are there any performance considerations I should be aware of?

Yes, std::optional has a small overhead compared to using raw pointers, but it provides better safety and clarity in your code.

What about using std::optional with containers?

Using std::optional in containers can be useful for representing optional values, but be mindful of the added complexity in handling them.

Any common pitfalls to avoid?

Avoid using std::optional for types that are expensive to copy or move, and don't use it as a substitute for error handling.