What is new with swift 6?

Swift 6 introduces several new features and improvements aimed at enhancing portability, performance, and the overall developer experience. Here are some of the key updates:

1. Data Race Safety: Swift 6 introduces a new language mode that provides data race safety guarantees, helping developers write correct concurrent programs. This feature is opt-in, allowing developers to adopt it module by module and interoperate with dependencies that may not have migrated to the Swift 6 language mode yet.

2. Embedded Swift: A new language subset called Embedded Swift is introduced, which can run on highly constrained systems like operating system kernels and microcontrollers.

3. Non-Copyable Types: Swift 6 introduces non-copyable types, which enhance the language's expressivity and safety.

4. Swift Testing: An all-new testing framework named Swift Testing is introduced, built from the ground up for Swift. It features expressive APIs that simplify writing tests.

5. Concurrency Improvements: There are significant improvements to concurrency, including enhancements to generics and data race checking.

6. GitHub Organization: Swift is moving to a new organization on GitHub, named swiftlang, which will host critical projects for the Swift ecosystem, including the Swift Compiler foundation.

For more detailed information, you can refer to the session What’s new in Swift (17:03) which covers language updates, including the new language mode and data race safety.