WWDC26 Swift guide

What’s new in in SwiftDiscover updates to Swift and related tools and frameworks.Swift 6.4Swift 6.4 delivers improvements designed for developers at every level. A set of ergonomic refinements remove everyday friction, including simplified availability syntax with anyAppleOS and finer-grained control over warnings with the @diagnose attribute. Asynchronous code is now supported in defer statements, guaranteeing cleanup runs whether a function returns or throws. A new iteration protocol ext