swift-concurrency-6-2

To migrate to Swift 6.2 concurrency, analyze your codebase to enable MainActor default inference and resolve existing data race warnings. This transition shifts code from implicit background offloading to explicit, safe, actor-based execution.

MainActor default inference is a Swift 6.2 concurrency mechanism that isolates types to the main thread by default. It safely manages state to prevent data races without requiring explicit annotations for every UI-bound object.

To offload heavy tasks safely, apply the @concurrent attribute for explicit parallelism. This executes CPU-intensive work in background threads while maintaining Swift 6.2's strict data-race-free safety guarantees.

Isolated conformances implement protocol conformances directly on MainActor-isolated types. This architectural pattern maintains data safety across your Swift application by ensuring protocol methods execute safely on the main thread.

Swift 6.2 defaults to single-threaded execution to prevent common data race bugs. This strict baseline ensures data safety, requiring developers to explicitly opt-in to parallelism via attributes like @concurrent for background processing.