Thanks to the work of @agraf, @KhaosT, @imbushuo, and others, we have Virtualization.framework working on M1 Macs. These [changes][1] have been merged with QEMU v5.2.0 RC3 (will rebase once the final release is out) and integrated with UTM, a brand new QEMU frontend designed in SwiftUI for iOS 14 and macOS 11.
Modern Cocoa development involves a lot of asynchronous programming using closures and completion handlers, but these APIs are hard to use. This gets particularly problematic when many asynchronous operations are used, error handling is required, or control flow between asynchronous calls gets complicated. This proposal describes a language extension to make this a lot more natural and less error prone.
This paper introduces a first class Coroutine model to Swift. Functions can opt into to being async, allowing the programmer to compose complex logic involving asynchronous operations, leaving the compiler in charge of producing the necessary closures and state machines to implement that logic.
