@swift-4.0.3 @swift-4.1.3 @swift-4.2.4 @swift-5.0.3 @swift-main

if #available(macOS 10.14, *) { print("macOS", terminator: " ") } if #available(iOS 12.3, *) { print("iOS", terminator: " ") } if #available(tvOS 12.3, *) { print("tvOS", terminator: " ") } if #available(watchOS 5.2, *) { print("watchOS", terminator: " ") }