Functional Swift by Chris Eidhof & Florian Kugler & Wouter Swierstra

Author:Chris Eidhof & Florian Kugler & Wouter Swierstra
Language: eng
Format: mobi, epub
Publisher: objc.io
Published: 2016-12-01T16:51:08+00:00

Why Use Enumerations?

Working with optionals may still be preferable over the Result type that we’ve defined here, for a variety of reasons: the built-in syntactic sugar can be convenient; the interface you define will be more familiar to Swift developers, as you only rely on existing types instead of defining your own enumeration; and sometimes the Error isn’t worth the additional hassle of defining an enumeration.

The point we want to make, however, isn’t that the Result type is the best way to handle all errors in Swift. Instead, we hope to illustrate how you can use enumerations to define your own types tailored to your specific needs. By making these types precise, you can use Swift’s type checking to your advantage and prevent many bugs before your program has been tested or run.

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