April 2017
Intermediate to advanced
316 pages
9h 33m
English
Content preview from Swift Functional Programming - Second Edition
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Generic data structures
In addition to Generic functions, Swift empowers us to define our own Generic types and data structures. In Chapter 4, Enumerations and Pattern Matching, we developed a simple tree with enumeration. Let's make it Generic so that it can take different types as its leaf and node:
enum GenericTree <T> { case empty case leaf(T) indirect case node(GenericTree, GenericTree) } print(GenericTree.node(GenericTree.leaf("First"), GenericTree.node(GenericTree.leaf("Second"), GenericTree.leaf("Third")))) // prints node(GenericTree<Swift.String>.leaf("First"), GenericTree<Swift.String>.node(GenericTree<Swift.String>.leaf("Second"), GenericTree<Swift.String>.leaf("Third")))
With Generics, our tree, which could accept only
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