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Swift Struct Copy Function

1 post · Sep 2021

What this trail covers

Shopify has developed and enhanced capabilities for creating immutable objects in Swift, inspired by Kotlin's data class copy function. This involves implementing a functional builder pattern to capture override values, allowing for convenient creation of new struct instances with modified properties while preserving original values. This pattern aims to reduce boilerplate code and improve the adoption of immutability in Swift codebases.

All Shopify trails
  1. A Kotlin Style .copy Function for Swift Structs - ShopifyThis post details the implementation of a Swift struct copy function that mimics Kotlin's data class .copy() behavior. It addresses the limitations of Swift's default initializers and the challenges with optional properties. The solution presented is a functional builder pattern that accepts a closure to specify overridden properties, defaulting to original values otherwise. The post also highlights the potential for using Sourcery to automate the generation of these initializers and builders.