Chapter 2. Modeling data with enums
This chapter covers
- How enums are an alternative to subclassing
- Using enums for polymorphism
- Learning how enums are “or” types
- Modeling data with enums instead of structs
- How enums and structs are algebraic types
- Converting structs to enums
- Safely handling enums with raw values
- Converting strings to enums to create robust code
Enumerations, or enums for short, are a core tool used by Swift developers. Enums allow you to define a type by enumerating over its values, such as whether an HTTP method is a get, put, post, or delete action, or denoting if an IP-address is either in IPv4 or IPv6 format.
Many languages have an implementation of enums, with a different type of implementation per language. ...
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