what's new in latest swift version

The latest version of Swift, Swift 6, introduces several significant updates and improvements:

1. Data Race Safety: Swift 6 introduces a new language mode that achieves data race safety, expanding Swift's safety guarantees to concurrent programs. This is a major step forward in ensuring the correctness of concurrent code.

2. Non-Copyable Types: Swift 6 introduces non-copyable types. Previously, all Swift types, whether value types or reference types, were copyable by default. This new feature allows for more efficient memory management and performance improvements.

3. Embedded Swift: A new language subset called Embedded Swift is introduced, which can run on highly constrained systems. This makes Swift a viable option for developing software for embedded systems and microcontrollers.

4. Concurrency Improvements: There are significant improvements to concurrency, including complete concurrency checking in Swift 5.10 and enhancements to data race checking to ensure safety.

5. Swift Testing: An all-new testing framework built from the ground up for Swift, named Swift Testing, is introduced. It has expressive APIs that make it simple to write tests and is designed to be easy to use.

6. C++ Interoperability: Swift 6 continues to improve interoperability with C++, making it easier to integrate Swift with existing C++ codebases.

7. Typed Throws: This feature allows for more precise error handling by specifying the types of errors that can be thrown by functions.

8. Low-Level Synchronization Primitives: New primitives are introduced to provide more control over synchronization in concurrent programming.

For more detailed information, you can refer to the session "What’s new in Swift" (17:03).