When Apple announced Swift 2 at the World Wide Developers Conference (WWDC) in 2016, they also declared that Swift was the world's first protocol-oriented programming (POP) language. By its name, we might assume that protocol-oriented programming is all about the protocol; however, that would be a wrong assumption. Protocol-oriented programming is about so much more than just the protocol; it is actually a new way of not only writing applications, but also thinking about programming.
In this chapter, we will cover the following topics:
- What is the difference between OOP and POP design?
- What is protocol-oriented design?
- What is protocol composition?
- What is protocol inheritance?
Days after Dave Abrahams did his presentation ...