John Sundell • 10/28/2021

Making async system APIs backward compatible

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This technical article addresses the challenge of using Swift 5.5's async/await concurrency features, like URLSession.data(from:), on operating systems older than iOS 15/macOS Monterey. It demonstrates a solution using Swift's continuation mechanism to create backward-compatible extensions, with a complete example and a reference to the AsyncCompatibilityKit library.

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#api design #async/await #concurrency
Making async system APIs backward compatible

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