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Apple's Swift 4.0 Includes A Compatibility Mode For 'The Majority' Of Swift 3.x Code

Saturday September 23, 2017. 07:34 PM , from Slashdot/Apple
An anonymous reader quotes InfoWorld:
Swift 4.0 is now available. It's a major upgrade to Apple's Swift, the three-year old successor to the Objective-C language used for MacOS and iOS application development. The Swift 4 upgrade enhances the Swift Package Manager and provides new compatibility modes for developers. Apple said Swift 4 also makes Swift more stable and improves its standard library. Swift 4 is largely source-compatible with Swift 3 and ships as part of Apple's Xcode 9 IDE...

Swift 4's new compatibility modes could save you from having to modify code to be able to use the new version of the compiler. Two modes are supported, including the Swift 3.2 mode, which accepts most source files built with Swift 3.x compilers, and the Swift 4.0 mode, which includes Swift 4 and API changes. Apple said that some source migration will be needed for many projects, but the number of source changes are 'quite modest' compared to many previous major changes between Swift releases.
Apple calls Swift 4.0 'a major language release' that also includes new language changes and updates that came through the Swift Evolution process.

Read more of this story at Slashdot.
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