[Pitch] Split continuation

Hi everyone, Here is a pitch to make working with continuations easier and enable a more performant way to resume them in cases where the current execution context can be donated: [Concurrency] Proposal for split continuation by FranzBusch · Pull Request #3548 · swiftlang/swift-evolution · GitHub Split continuations Summary of changes Introduces a new form of withContinuation whose body is async and receives both halves of a continuation: the existing Continuation that is used to resume and a...