what is new in Swift 6
Asked on 08/05/2024
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Swift 6 introduces several significant improvements and new features aimed at enhancing portability, performance, and the overall developer experience. 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, helping developers write correct concurrent programs. This mode is opt-in and can be adopted module by module (Platforms State of the Union).
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Non-Copyable Types: Swift 6 introduces non-copyable types, which are types that cannot be copied, helping to manage resources more efficiently (What’s new in Swift).
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Embedded Swift: A new language subset called Embedded Swift is introduced, which can run on highly constrained systems like operating system kernels and microcontrollers (Platforms State of the Union).
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Concurrency Improvements: There are significant improvements to concurrency, including better data race checking and the ability to pass non-sendable values across active isolation boundaries (What’s new in Swift).
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Swift Testing: An all-new testing framework named Swift Testing is introduced, which has expressive APIs that make it simple to write tests (Platforms State of the Union).
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GitHub Organization: Swift is moving to a new organization on GitHub (swiftlang), which will host the Swift Compiler foundation and other key libraries (What’s new in Swift).
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C++ Interoperability: Continued improvements in interoperability with C++ (What’s new in Swift).
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Typed Throws: Introduction of typed throws, which allows functions to specify the types of errors they can throw (What’s new in Swift).
For a detailed overview of these features, you can watch the session What’s new in Swift.
Migrate your app to Swift 6
Experience Swift 6 migration in action as we update an existing sample app. Learn how to migrate incrementally, module by module, and how the compiler helps you identify code that’s at risk of data races. Discover different techniques for ensuring clear isolation boundaries and eliminating concurrent access to shared mutable state.
Platforms State of the Union 5-Minute Recap
Watch a quick recap of the newest advancements on Apple platforms.
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.