What does swift 6 add

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 additions:

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 diagnoses concurrent access to memory at compile time, making it easier to identify and fix data race issues (Platforms State of the Union).

2. 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).

3. 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).

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 (Platforms State of the Union).

5. GitHub Organization: Swift will be moving to a new organization on GitHub, named swiftlang, which will host critical projects for the Swift ecosystem, including the Swift Compiler foundation (Platforms State of the Union).

6. Incremental Adoption: The new Swift 6 language mode is opt-in, allowing developers to adopt it module by module. This means you can interoperate with dependencies that may or may not have migrated to the Swift 6 language mode (What’s new in Swift).

7. Concurrency Improvements: There are enhancements to concurrency, including improvements to generics and the introduction of low-level synchronization primitives (What’s new in Swift).

For a detailed overview of these features, you can watch the session What’s new in Swift.