summarise what's new in swift 6?
Asked on 2025-06-11
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Swift 6 introduces several new features and improvements aimed at enhancing safety, performance, and developer productivity. Here are some of the key updates:
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Data Race Safety: Swift 6 introduces a new language mode that provides compile-time data race safety. This feature helps diagnose concurrent access to memory, making concurrent programming safer and more reliable. The new language mode is opt-in, allowing developers to adopt it at their own pace (Platforms State of the Union).
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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 (What’s new in Swift).
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Embedded Swift: A new language subset called Embedded Swift is introduced, allowing Swift to run on highly constrained systems like operating system kernels and microcontrollers. This expands Swift's applicability to more environments (What’s new in Swift).
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Concurrency Improvements: Swift 6 continues to enhance concurrency features, making it easier to write safe and efficient concurrent code. This includes improvements to async/await and actor models (Platforms State of the Union).
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Swift Testing Framework: A new testing framework named Swift Testing is introduced, providing expressive APIs to simplify writing tests (Platforms State of the Union).
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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 meet modern development challenges while maintaining its focus on safety and performance.
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.
What’s new in Swift
Join us for an update on Swift. We’ll talk about workflow improvements that make you more productive, and new and modernized library APIs for fundamental programming tasks. We’ll show examples of Swift adoption throughout more layers of the software stack. Finally, we’ll explore new language features for both improving approachability of concurrency, and achieving peak performance when you need it.
Platforms State of the Union
Discover the newest advancements on Apple platforms.