Swift 2.2 adds features such as compile-time version checks with #if swift(>=3.0), checked selectors using #selector to avoid runtime errors, built-in tuple comparisons up to six elements, and allows most keywords as argument labels without backticks.
Apple launched Swift as an open source project with the Swift.org site, which includes key parts like the compiler, standard library, LLDB debugger, core libraries, and package manager.
Now that the Swift Continuous Integration system is established and proven, we’d like to grant commit access on a more frequent basis to project contributors who have established a track record of good contributions.
Apple's Swift Team has released the benchmark suite as open source. It includes 75 benchmarks for key Swift tasks, libraries for common functions, a driver to run and show metrics, and a tool to compare versions.
Apple has rolled out continuous integration for the Swift project. Jenkins powers the system, which builds and tests on macOS, iOS simulator, and Ubuntu versions 14.04 and 15.10.
Apple saw a style gap between Cocoa interfaces and the Swift standard library. This gap made coding, debugging, and upkeep harder.
Swift 2.2 marks the first official release after Swift became open source. It stays mostly compatible with Swift 2.1 and focuses on core fixes, better diagnostics, and faster code without big language changes.
Swift 3 aims to set API design guidelines and apply them across libraries to make the language feel more unified.
Apple released a Linux port of Swift with the open source project launch. Users can build it from sources or download binaries for Ubuntu on x86_64 architecture.
Apple has launched the open source Swift project and the Swift.org website. They aim to work with the community to fix issues, add features, and expand Swift to new platforms.