swift-concurrency-6-2
Swift 6.2 Approachable Concurrency
Patterns for adopting Swift 6.2's concurrency model where code runs single-threaded by default and concurrency is introduced explicitly. Eliminates common data-race errors without sacrificing performance.
When to Activate
- Migrating Swift 5.x or 6.0/6.1 projects to Swift 6.2
- Resolving data-race safety compiler errors
- Designing MainActor-based app architecture
- Offloading CPU-intensive work to background threads
- Implementing protocol conformances on MainActor-isolated types
- Enabling Approachable Concurrency build settings in Xcode 26
Core Problem: Implicit Background Offloading
In Swift 6.1 and earlier, async functions could be implicitly offloaded to background threads, causing data-race errors even in seemingly safe code:
// Swift 6.1: ERROR
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