Learning Swift by Andrew J Wagner

Author:Andrew J Wagner
Language: eng
Format: epub, pdf
Publisher: Packt Publishing

Determining value type or reference type

A value type is any type that is defined as either a structure or an enumeration, while all classes are reference types. This is easy to determine for your own custom types based on how you declared them. Beyond that, all of the built-in types for Swift, such as strings, arrays, and dictionaries are value types. If you are ever uncertain, you can test any of the two types you want in a playground, to see if its behavior is consistent with a value type or a reference type. The simplest behavior to check is what happens on assignment.

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