Between the September 2017 release of Swift 4 and the planned fall 2018 release of Swift 5, Apple is working on intermediate versions to smooth the transition.Next version: Key features in Apple’s Swift 4.2
The planned 4.2 release of Apple’s Swift language is focused on stabilizing the language’s ABI (application binary interface). Swift 4.2 will serve as an intermediary step to achieving ABI stability in the planned Swift 5.0 release due late this year.

ABI stability allows for binary compatibility between applications and libraries compiled with different Swift releases.To read this article in full, please click here

Leave a Reply