what is new in Swift 6

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:

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).
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).
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).
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).
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).
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).
C++ Interoperability: Continued improvements in interoperability with C++ (What’s new in Swift).
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.