Complete Modern C++ - std::optional - II

The video tutorial explains how to modify functions to return optionals, a standard way to handle cases where a function may or may not return a value. It covers different methods to check if an optional contains a value, how to handle exceptions when accessing optional values, and introduces the 'value or' function to provide default values. The tutorial also discusses reusing optionals and resetting their values, emphasizing the importance of matching types within optionals.

Explain the use of the 'value or' function in the context of optionals.

How can you reuse an optional after initializing it with a value?