Type-Safe Interfaces with Modern C++ - What Is an Optional?

The video tutorial explores the concept of Optional T in C++, detailing its properties, use cases, and implementation. Optional T can be set or unset, representing a value that may or may not be present. It is used to model functions that can fail, control object lifetimes, and manage non-mandatory data members. The tutorial compares Optional T with smart pointers and raw pointers, highlighting its advantages in terms of value semantics and memory efficiency. Examples demonstrate how Optional T can be used in function signatures and data structures, particularly in microservice architectures.

What does an optional T represent in programming?

How does an optional T differ from a pointer?

Explain the two states an optional T can be in.

Describe how you can use an optional to model a function that can fail.

What are the benefits of using optional types in data structures?

Discuss the memory layout of an optional T.

What are the drawbacks of using smart pointers compared to optional types?