What is new in Swift 6?
Asked on 06/10/2025
1 search
Swift 6 introduces several new features and improvements aimed at enhancing safety, performance, and developer experience. Here are some of the key updates:
-
Non-Copyable Types: Swift 6 introduces non-copyable types, which suppress the default copyability of Swift types. This is useful for scenarios requiring unique ownership, such as managing system resources like files. Non-copyable types help prevent runtime issues like multiple writers to the same file and resource leaks. What’s new in Swift
-
Data Race Safety: A new Swift 6 language mode provides compile-time data race safety, making concurrent programming safer by diagnosing data races at compile time. This mode is opt-in, allowing developers to adopt it module by module. Platforms State of the Union
-
Embedded Swift: Swift 6 introduces a new language subset called Embedded Swift, designed for highly constrained systems like operating system kernels and microcontrollers. What’s new in Swift
-
Swift Testing Framework: A new testing framework named Swift Testing has been introduced, offering expressive APIs to simplify writing tests. Platforms State of the Union
-
GitHub Organization: Swift is moving to a new organization on GitHub, named swiftlang, which will host critical projects for the Swift ecosystem. What’s new in Swift
These updates reflect Swift's ongoing evolution to improve safety, performance, and ease of use for developers across various platforms and applications.
What’s new in Swift
Join us for an update on Swift. We’ll briefly go through a history of Swift over the past decade, and show you how the community has grown through workgroups, expanded the package ecosystem, and increased platform support. We’ll introduce you to a new language mode that achieves data-race safety by default, and a language subset that lets you run Swift on highly constrained systems. We’ll also explore some language updates including noncopyable types, typed throws, and improved C++ interoperability.
Platforms State of the Union
Discover the newest advancements on Apple platforms.
What’s new in SwiftUI
Learn how you can use SwiftUI to build great apps for any Apple platform. Explore a fresh new look and feel for tabs and documents on iPadOS. Improve your window management with new windowing APIs, and gain more control over immersive spaces and volumes in your visionOS apps. We’ll also take you through other exciting refinements that help you make expressive charts, customize and layout text, and so much more.