Summary

A few core elements to know about std::optional:

• std::optional is a wrapper type to express “null-able” types

• std::optional won’t use any dynamic allocation

• std::optional contains a value or it’s empty

• use operator *, operator->, value() or value_or() to access the underlying value.

• std::optional is implicitly converted to bool so that you can easily check if it contains a value or not

---

Get ready for a short quiz on this chapter.