lattner

Swift Concurrency Manifesto

Author: Chris Lattner

Chinese Translation by Jason Yu

Contents

• Introduction
• Overall Vision

lattner

Async/Await for Swift

• Proposal: SE-XXXX
• Authors: Chris Lattner, Joe Groff

Introduction

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.

phausler

import Foundation

struct HashingSingleValueEncodingContainer : SingleValueEncodingContainer {
    var owner: HashingEncoder

    mutating func combineHash<T>(of element: T?) where T: Hashable {
        if let elt = element {
            owner.combine(elt, hash: elt.hashValue) { (other: Any) -> Bool in
                if let otherValue = other as? T {
                    return elt == otherValue

jt-nti

TJ Bot notes

Just a few notes in my quest to build a bot. It's worth reading Calling all Makers: Meet TJBot! if you've not already met TJ Bot!

I currently have a 3D print of the robot thanks to a friendly master inventor with a new toy. It needs a brain though!

Parts

Parts from The Pi Hut (other stores are available!)