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.

lludo

lazy var managedObjectModel: NSManagedObjectModel = {
        // The managed object model for the application.
        let modelURL = NSBundle.mainBundle().URLForResource("<appName>", withExtension: "momd")!
        let managedObjectModel = NSManagedObjectModel(contentsOfURL: modelURL)!

        // Check is we are running as test or not
        let environment = NSProcessInfo.processInfo().environment as [String : AnyObject]
        let isTest = (environment["XCInjectBundle"] as? String)?.pathExtension == "xctest"

lludo

extension String {

    func replace(regularExpression: NSRegularExpression, transform: (String) -> String) -> String {

        var output = ""
        var lastMatchedLocation = self.startIndex
        let rangeAll = NSMakeRange(0, countElements(self));

        regularExpression.enumerateMatchesInString(self, options: NSMatchingOptions(0), range: rangeAll) {

mbinna

#!/bin/sh
 
# Launch application using ios-sim and set up environment to inject test bundle into application
# Source: http://stackoverflow.com/a/12682617/504494

if [ "$RUN_APPLICATION_TESTS_WITH_IOS_SIM" = "YES" ]; then
    test_bundle_path="$BUILT_PRODUCTS_DIR/$PRODUCT_NAME.$WRAPPER_EXTENSION"
    environment_args="--setenv DYLD_INSERT_LIBRARIES=/../../Library/PrivateFrameworks/IDEBundleInjection.framework/IDEBundleInjection --setenv XCInjectBundle=$test_bundle_path --setenv XCInjectBundleInto=$TEST_HOST"
    ios-sim launch $(dirname $TEST_HOST) $environment_args --args -SenTest All $test_bundle_path
    echo "Finished running tests with ios-sim"