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https://github.com/peterfriese/swift-async-await-experiments

Experiments with Swift's new async/await feature (SE 0296)
https://github.com/peterfriese/swift-async-await-experiments

async async-await swift

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Experiments with Swift's new async/await feature (SE 0296)

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Swift async/await Experiments



  


    Experiments with Swift's new async/await feature (SE 0296)

    


    


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## About The Project



Experiments with Swift's new async/await feature ([SE 0296](https://github.com/apple/swift-evolution/blob/main/proposals/0296-async-await.md))



[Here's an article](https://peterfriese.dev/async-await-in-swiftui/) that shows you how to use this feature.



## Requirements

Previous versions of the code in this repository made use of the experimental Swift compiler toolchain. Since WWDC 2021, support for async/await is now available in the default compiler toolchain.



* Xcode 13 or later

* ~~Swift Compiler Toolchain (Jan 04, 2021 or later)~~



## Breaking changes



As this is still in development, there will be changes. I updated the code to reflect those changes, and wouldn't be surprised to see further breaking changes before a final release is cut. If you run into any issues, feel free to open an issue on this repo (or even better - send a PR if you've got time time to build a solution).



### 2022-11-05

* Updated the code to use `Task { }` instead of `async { }`



### 2021-08-06 (WWDC 21)

* Xcode 13 now contains Swift 5.5, we no longer need to download the experimental compiler toolchain

* [According to the Swift team](https://twitter.com/AirspeedSwift/status/1401992834194952200), the correct way to launch an async task from with in SwiftUI is `async { }` (in beta 1) or `Task { }` (after beta 1).



### 2021-05-25



The Swift Development team has been making a couple of breaking changes (after all, this is still pre-release software):

* `@asyncHandler` has been removed from the language (see [PR #37415](https://github.com/apple/swift/pull/37415)). According to [this discussion](https://forums.swift.org/t/new-concurrency-api-not-available-in-latest-toolchain/47389/2), we can wrap asynchronous code in a call to `detach { }` as an alternative. As of yet, it is unclear what if there will be a replacement for `@asyncHandler`.

* Since Swift can now be shipped with the OS, all new features in the Swift standard library will need to have an availability annotation. To be able to mark new APIs as available for unreleased versions of future versions of the OS, a special case of `9999` has been introduced. This also means that all code using those new APIs will need to use availability flags as well. For details, see [this discussion on the Swift forums](https://forums.swift.org/t/availability-and-the-standard-library/20932).



## License



Distributed under the Apache 2 License. See `LICENSE` for more information.



[contributors-shield]: https://img.shields.io/github/contributors/peterfriese/Swift-Async-Await-Experiments.svg?style=flat-square

[contributors-url]: https://github.com/peterfriese/Swift-Async-Await-Experiments/graphs/contributors

[forks-shield]: https://img.shields.io/github/forks/peterfriese/Swift-Async-Await-Experiments.svg?style=flat-square

[forks-url]: https://github.com/peterfriese/Swift-Async-Await-Experiments/network/members

[stars-shield]: https://img.shields.io/github/stars/peterfriese/Swift-Async-Await-Experiments.svg?style=flat-square

[stars-url]: https://github.com/peterfriese/Swift-Async-Await-Experiments/stargazers

[issues-shield]: https://img.shields.io/github/issues/peterfriese/Swift-Async-Await-Experiments.svg?style=flat-square

[issues-url]: https://github.com/peterfriese/Swift-Async-Await-Experiments/issues

[license-shield]: https://img.shields.io/github/license/peterfriese/Swift-Async-Await-Experiments.svg?style=flat-square

[license-url]: https://github.com/peterfriese/Swift-Async-Await-Experiments/blob/master/LICENSE.txt



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[linkedin-url]: https://www.linkedin.com/in/peterfriese

[product-screenshot]: images/screenshot.png



[swift-shield]: https://img.shields.io/badge/swift-5.4_trunk-FA7343?logo=swift&color=FA7343&style=flat-square

[swift-url]: https://swift.org



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[xcode-url]: https://developer.apple.com/xcode/



[featurerequest-url]: https://github.com/peterfriese/Swift-Async-Await-Experiments/issues/new?assignees=&labels=type%3A+feature+request&template=feature_request.md

[featurerequest-shield]: https://img.shields.io/github/issues/peterfriese/Swift-Async-Await-Experiments/feature-request?logo=github&style=flat-square

[discussions-url]: https://github.com/peterfriese/Swift-Async-Await-Experiments/discussions

[discussions-shield]: https://img.shields.io/badge/discussions-brightgreen?logo=github&style=flat-square