Add test with Swift 5 enabling upcoming features (#156)

* Test upcoming features

* Fix up for concurrency issues with upcoming features in Swift5

.github/workflows/test.yml

@@ -45,6 +45,16 @@ jobs:
       - name: Test example tvOS
         run: scripts/test.sh example-cross-platform tvos
 
+  upcoming_feature:
+    name: Upcoming features
+    runs-on: macos-14
+    env:
+      DEVELOPER_DIR: /Applications/Xcode_15.4.app
+    steps:
+      - uses: actions/checkout@v4
+      - name: Test with upcoming features
+        run: ENABLE_UPCOMING_FEATURES=1 scripts/test.sh library ios
+
   benchmark:
     name: Benchmark
     runs-on: macos-14

Package@swift-5.swift

@@ -2,6 +2,20 @@
 
 import PackageDescription
 
+let swiftSettings: [SwiftSetting]
+
+if Context.environment["ENABLE_UPCOMING_FEATURES"] != nil {
+    swiftSettings = [
+        .enableUpcomingFeature("ExistentialAny"),
+        .enableUpcomingFeature("DisableOutwardActorInference"),
+    ]
+}
+else {
+    swiftSettings = [
+        .enableUpcomingFeature("ExistentialAny"),
+    ]
+}
+
 let package = Package(
     name: "swiftui-atom-properties",
     platforms: [
@@ -15,11 +29,13 @@ let package = Package(
     ],
     targets: [
         .target(
-            name: "Atoms"
+            name: "Atoms",
+            swiftSettings: swiftSettings
         ),
         .testTarget(
             name: "AtomsTests",
-            dependencies: ["Atoms"]
+            dependencies: ["Atoms"],
+            swiftSettings: swiftSettings
         ),
     ],
     swiftLanguageVersions: [.v5]

Sources/Atoms/AsyncPhase.swift

@@ -49,7 +49,7 @@ public enum AsyncPhase<Success, Failure: Error> {
         /// returned value as a success, or thrown error as a failure.
         ///
         /// - Parameter body: A async throwing closure to evaluate.
-        public init(catching body: @Sendable () async throws -> Success) async where Failure == Error {
+        public init(catching body: @Sendable () async throws -> Success) async where Failure == any Error {
             do {
                 let value = try await body()
                 self = .success(value)

Sources/Atoms/Core/SubscriberState.swift

@@ -34,6 +34,10 @@ internal final class SubscriberState {
             _modify { yield &_unsubscribe.value }
         }
 
+        #if hasFeature(DisableOutwardActorInference)
+            nonisolated init() {}
+        #endif
+
         deinit {
             if Thread.isMainThread {
                 _unsubscribe.value?(_subscribing.value)

Sources/Atoms/Suspense.swift

@@ -206,6 +206,10 @@ private extension Suspense {
             }
         }
 
+        #if !compiler(>=6) && hasFeature(DisableOutwardActorInference)
+            nonisolated init() {}
+        #endif
+
         deinit {
             suspensionTask?.cancel()
         }

scripts/test.sh

@@ -24,18 +24,18 @@ esac
 
 case $TARGET in
 library)
-    xcodebuild test -scheme swiftui-atom-properties -destination platform="$platform"
+    xcodebuild clean test -scheme swiftui-atom-properties -destination platform="$platform"
     ;;
 example-ios)
     cd Examples/Packages/iOS
-    xcodebuild test -scheme iOSExamples -destination platform="$platform"
+    xcodebuild clean test -scheme iOSExamples -destination platform="$platform"
     ;;
 example-cross-platform)
     cd Examples/Packages/CrossPlatform
-    xcodebuild test -scheme CrossPlatformExamples -destination platform="$platform"
+    xcodebuild clean test -scheme CrossPlatformExamples -destination platform="$platform"
     ;;
 benchmark)
     cd Benchmarks
-    xcodebuild test -scheme BenchmarkTests -destination platform="$platform"
+    xcodebuild clean test -scheme BenchmarkTests -destination platform="$platform"
     ;;
 esac