Ted Kremenek of Apple has announced release of Swift 5:
https://swift.org/blog/swift-5-released/
Swift 5 is a major milestone in the evolution of the language. Thanks to ABI stability, the Swift runtime is now included in current and future versions of Apple’s platform operating systems: macOS, iOS, tvOS and watchOS. Swift 5 also introduces new capabilities that are building blocks for future versions, including a reimplementation of String, enforcement of exclusive access to memory during runtime, new data types, and support for dynamically callable types.
Regards,
Roger Lacroix
Capitalware Inc.