Fixes for Swift 6.2 on iOS 26 and macOS 26

Readme.md

@@ -32,8 +32,8 @@ class SimplestVersion {
 This example uses the context parameter to avoid reference cycles with `self`.
 
 ```swift
-class WithContext {
-    var cancellables = Set<AnyAsyncCancellable>()
+final class WithContext: Sendable {
+    nonisolated(unsafe) var cancellables = Set<AnyAsyncCancellable>()
 
     init() {
         NotificationCenter.default
@@ -55,7 +55,7 @@ class WithContext {
 Working with Combine publishers is trivial thanks to [`AnyPublisher.values`][values].
 
 ```swift
-import Combine
+@preconcurrency import Combine
 
 class CombineExample {
     var cancellables = Set<AnyAsyncCancellable>()

Sources/AsyncMonitor/AsyncMonitor.swift

@@ -20,7 +20,7 @@ public final class AsyncMonitor: Hashable, AsyncCancellable {
     ///                Defaults to `#isolation`, preserving the caller's actor isolation.
     ///   - sequence: The asynchronous sequence of elements to observe.
     ///   - block: A closure to execute for each element yielded by the sequence.
-    @available(iOS 18, *)
+    @available(iOS 18, macOS 15, *)
     public init<Element: Sendable>(
         isolation: isolated (any Actor)? = #isolation,
         sequence: any AsyncSequence<Element, Never>,
@@ -41,6 +41,7 @@ public final class AsyncMonitor: Hashable, AsyncCancellable {
     ///   - sequence: The asynchronous sequence of elements to observe.
     ///   - block: A closure to execute for each element yielded by the sequence.
     @available(iOS, introduced: 17, obsoleted: 18)
+    @available(macOS, introduced: 14, obsoleted: 15)
     public init<Element: Sendable, Sequence>(
         sequence: sending Sequence,
         @_inheritActorContext performing block: @escaping @Sendable (Element) async -> Void

Sources/AsyncMonitor/AsyncSequence+Extensions.swift

@@ -1,4 +1,4 @@
-@available(iOS 18, *)
+@available(iOS 18, macOS 15, *)
 public extension AsyncSequence where Element: Sendable, Failure == Never {
     /// Observes the elements yielded by this sequence and executes the given closure with each element.
     ///
@@ -36,6 +36,7 @@ public extension AsyncSequence where Element: Sendable, Failure == Never {
 }
 
 @available(iOS, introduced: 17, obsoleted: 18)
+@available(macOS, introduced: 14, obsoleted: 15)
 public extension AsyncSequence where Self: Sendable, Element: Sendable {
     /// Observes the elements yielded by this sequence and executes the given closure with each element.
     ///

Sources/AsyncMonitor/NSObject+AsyncKVO.swift

@@ -25,7 +25,7 @@ public extension NSObjectProtocol where Self: NSObject {
     }
 }
 
-@available(iOS 18, *)
+@available(iOS 18, macOS 15, *)
 public extension NSObjectProtocol where Self: NSObject {
     /// Observes changes to the specified key path on the object and asynchronously yields each value. Values must be `Sendable`.
     ///
@@ -44,6 +44,7 @@ public extension NSObjectProtocol where Self: NSObject {
 }
 
 @available(iOS, introduced: 17, obsoleted: 18)
+@available(macOS, introduced: 14, obsoleted: 15)
 public extension NSObjectProtocol where Self: NSObject {
     /// Observes changes to the specified key path on the object and asynchronously yields each value. Values must be `Sendable`.
     ///

Tests/AsyncMonitorTests/AsyncMonitorTests.swift

@@ -49,12 +49,12 @@ class AsyncMonitorTests {
         try await Task.sleep(for: .milliseconds(10))
     }
 
-    class Owner {
-        let deinitHook: () -> Void
+    final class Owner: Sendable {
+        let deinitHook: @Sendable () -> Void
 
-        private var cancellable: (any AsyncCancellable)?
+        nonisolated(unsafe) private var cancellable: (any AsyncCancellable)?
 
-        init(center: NotificationCenter, deinitHook: @escaping () -> Void) {
+        init(center: NotificationCenter, deinitHook: @escaping @Sendable () -> Void) {
             self.deinitHook = deinitHook
             let name = Notification.Name("irrelevant name")
             cancellable = center.notifications(named: name)
@@ -78,8 +78,10 @@ class AsyncMonitorTests {
         }
     }
 
+    final class SendableObject: NSObject, Sendable {}
+
     @Test func stopsCallingBlockWhenContextIsDeallocated() async throws {
-        var context: NSObject? = NSObject()
+        var context: SendableObject? = SendableObject()
         subject = center.notifications(named: name)
             .map(\.name)
             .monitor(context: context!) { context, receivedName in

Tests/AsyncMonitorTests/NSObject+AsyncKVOTests.swift

@@ -9,22 +9,22 @@ class AsyncKVOTests {
     @Test(.timeLimit(.minutes(1)))
     func monitorValuesYieldsChanges() async throws {
         let subject = try #require(subject)
-        var values = [Double]()
+        let values = ValueLocker(value: [Double]())
         let total = 3
         cancellable = subject.values(for: \.fractionCompleted)
             .prefix(total)
             .monitor { progress in
-                values.append(progress)
+                values.modify { $0.append(progress) }
             }
 
         for n in 1...total {
             subject.completedUnitCount += 1
-            while values.count < n {
+            while values.value.count < n {
                 try await Task.sleep(for: .microseconds(2))
             }
         }
 
-        #expect(values.count == total)
+        #expect(values.value.count == total)
     }
 
     // It's important that the test and the progress-observing task are not on the same actor, so

Tests/AsyncMonitorTests/ReadmeExamples.swift

@@ -3,6 +3,8 @@ import Foundation
 
 // MARK: Basics
 
+extension Notification: @unchecked @retroactive Sendable {}
+
 class SimplestVersion {
     let cancellable = NotificationCenter.default
         .notifications(named: .NSCalendarDayChanged)
@@ -12,8 +14,8 @@ class SimplestVersion {
         }
 }
 
-class WithContext {
-    var cancellables = Set<AnyAsyncCancellable>()
+final class WithContext: Sendable {
+    nonisolated(unsafe) var cancellables = Set<AnyAsyncCancellable>()
 
     init() {
         NotificationCenter.default
@@ -31,7 +33,7 @@ class WithContext {
 
 // MARK: - Combine
 
-import Combine
+@preconcurrency import Combine
 
 class CombineExample {
     var cancellables = Set<AnyAsyncCancellable>()