6 Swift Language Features Most Developers Still Ignore

Swati Mishra

4 min read

·

2 days ago

--

Share

Swift has been around for a decade now, yet many of its most powerful language features still fly under the radar. Most developers use Swift the same way they did when they first learned it: classes, structs, optionals, closures — the basics.

Press enter or click to view image in full size

But Swift has grown into a deeply expressive, flexible, and modern language with features that can make your code:

• safer
• faster
• cleaner
• more maintainable
• easier to test

And yet… most developers don’t use these features consistently — or worse, don’t even know they exist.

In this article, we’ll explore 6 extremely useful Swift features that many developers still ignore but can instantly elevate your codebase.

1. @autoclosure — Making APIs Cleaner and More Expressive

You’ve seen this:

assert(user.isLoggedIn)

But the actual signature is:

func assert(_ condition: @autoclosure () -> Bool)

What is @autoclosure?

It turns an expression into a closure automatically, without you having to write { }.