this post was submitted on 30 Jul 2025
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Swift

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Default Actor Isolation - New Problems from Good Intentions (fatbobman.com)
submitted 1 week ago by fatbobman@programming.dev to c/swift@programming.dev
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While Swift’s strict concurrency checking has good intentions, it significantly increases the burden on developers in many single-threaded scenarios. Developers are forced to add unnecessary Sendable, @MainActor, and other declarations to their code just to satisfy the compiler’s requirements. Swift 6.2’s new Default Actor Isolation feature will greatly improve this situation and reduce unnecessary boilerplate code. This article will introduce the Default Actor Isolation feature and point out some situations to be aware of when using it.

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