Hello Rick, thanks for the explanation!
Am 2017-02-08 17:55, schrieb Rick Ballard:
I believe that the reason this was desired is because we expect that package authors may wish to conditionally adopt new Swift 4 language features without breaking their ability to build with Swift 3, using conditional compilation blocks, e.g. #if swift(>=4.0) // Swift 4 code goes here #endif With this proposal, you can do this by specifying [3, 4], in which case the Swift 4 compiler will compile it as Swift 4 code, and use the code inside the conditional compilation block, while the Swift 3 compiler will also be able to compile it (as Swift 3 code), skipping the conditional compilation block.
That makes sense. +1 :-) -- Martin _______________________________________________ swift-evolution mailing list [email protected] https://lists.swift.org/mailman/listinfo/swift-evolution
