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.

bheisig

Dashboard with a Raspberry Pi

Run Raspberry 3 in digital signage mode with Chromium Web browser on a TV screen

Pre-work

Download Raspbian Jessie Lite

Follow installation instructions

memfrag

import Foundation
import Compression

/// A convenience class for compressing an NSData object.
///
/// Example:
/// ```
/// let compression = Compression(algorithm: .ZLIB)
/// let compressedData = compression.compressData(data)
/// let decompressedData = compresison.decompressData(compressedData)