Swift.org - Swift 4 Release Process


This post describes the goals, release process, and estimated schedule for Swift 4. Swift 4 is a major release that is intended to be completed in the fall of 2017. It pivots around providing source stability for Swift 3 code while implementing essential feature work needed to achieve binary stability in the language. It will contain significant enhancements to the core language and Standard Library, especially in the generics system and a revamp of the String type.


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