Swift Concurrency API Reference

Complete Swift concurrency API reference for copy-paste patterns and syntax lookup.

Complements axiom-swift-concurrency (which covers when and why to use concurrency — progressive journey, decision trees, @concurrent, isolated conformances).

Related skills: axiom-swift-concurrency (progressive journey, decision trees), axiom-synchronization (Mutex, locks), axiom-assume-isolated (assumeIsolated patterns)

Part 1: Actor Patterns

Actor Definition

actor ImageCache {
    private var cache: [URL: UIImage] = [:]

    func image(for url: URL) -> UIImage? {
        cache[url]
    }