Brian Coyner • 8/7/2016

Wrapping Primitives

The article details a software engineering technique for Swift: wrapping primitive values (e.g., Int) in custom structs with failable initializers. Using the example of an EngineID for a Lionel train control app, the author demonstrates how this approach enforces value constraints (1-99) at compile time, improves API safety, and reduces the need for runtime unit tests. It's a practical guide to writing more robust and maintainable Swift code.

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#type safety #Swift #Struct