Enable upcoming features

Makefile

@@ -23,8 +23,8 @@ build-all-platforms:
 	done;
 
 test-swift:
-	swift test
-	swift test -c release
+	swift test -Xswiftc -D -Xswiftc EXCLUDE_EXPORTS
+	swift test -c release -Xswiftc -D -Xswiftc EXCLUDE_EXPORTS
 
 test-linux:
 	docker run \

Package.swift

@@ -138,3 +138,20 @@ let package = Package(
     .package(url: "https://github.com/apple/swift-docc-plugin", from: "1.0.0")
   )
 #endif
+
+for target in package.targets {
+  target.swiftSettings = target.swiftSettings ?? []
+  target.swiftSettings?.append(contentsOf: [
+    .enableUpcomingFeature("ExistentialAny"),
+    .enableUpcomingFeature("ImmutableWeakCaptures"),
+    .enableUpcomingFeature("InferIsolatedConformances"),
+    .enableUpcomingFeature("InternalImportsByDefault"),
+    .enableUpcomingFeature("MemberImportVisibility"),
+    .enableUpcomingFeature("NonisolatedNonsendingByDefault"),
+  ])
+  #if compiler(>=6.4)
+    target.swiftSettings?.append(contentsOf: [
+      .treatAllWarnings(as: .error)
+    ])
+  #endif
+}

Package@swift-6.0.swift

@@ -123,3 +123,15 @@ let package = Package(
     .package(url: "https://github.com/apple/swift-docc-plugin", from: "1.0.0")
   )
 #endif
+
+for target in package.targets {
+  target.swiftSettings = target.swiftSettings ?? []
+  target.swiftSettings?.append(contentsOf: [
+    .enableUpcomingFeature("ExistentialAny"),
+    .enableUpcomingFeature("ImmutableWeakCaptures"),
+    .enableUpcomingFeature("InferIsolatedConformances"),
+    .enableUpcomingFeature("InternalImportsByDefault"),
+    .enableUpcomingFeature("MemberImportVisibility"),
+    .enableUpcomingFeature("NonisolatedNonsendingByDefault"),
+  ])
+}

Sources/Dependencies/Dependency.swift

@@ -1,5 +1,5 @@
 #if canImport(SwiftUI)
-  import SwiftUI
+  public import SwiftUI
 #endif
 
 /// A property wrapper for accessing dependencies.
@@ -76,7 +76,7 @@ public struct Dependency<Value>: _HasInitialValues {
     @Environment(\.dependencies) private var environmentValues
   #endif
 
-  private let keyPath: SendableKeyPath<DependencyValues, Value>
+  private let keyPath: any SendableKeyPath<DependencyValues, Value>
   private let filePath: StaticString
   private let fileID: StaticString
   private let line: UInt
@@ -105,7 +105,7 @@ public struct Dependency<Value>: _HasInitialValues {
   ///   - line: The source `#line` associated with the dependency.
   ///   - column: The source `#column` associated with the dependency.
   public init(
-    _ keyPath: KeyPath<DependencyValues, Value> & Sendable,
+    _ keyPath: any KeyPath<DependencyValues, Value> & Sendable,
     fileID: StaticString = #fileID,
     filePath: StaticString = #filePath,
     line: UInt = #line,

Sources/Dependencies/DependencyKey.swift

@@ -1,3 +1,5 @@
+import IssueReporting
+
 /// A key for accessing dependencies.
 ///
 /// Types conform to this protocol to extend ``DependencyValues`` with custom dependencies. It is

Sources/Dependencies/DependencyValues.swift

@@ -1,4 +1,4 @@
-import Foundation
+public import Foundation
 import IssueReporting
 
 #if os(Windows)
@@ -144,7 +144,7 @@ public struct DependencyValues: Sendable {
         guard
           let XCTestObservation = objc_getProtocol("XCTestObservation"),
           let XCTestObservationCenter = NSClassFromString("XCTestObservationCenter"),
-          let XCTestObservationCenter = XCTestObservationCenter as Any as? NSObjectProtocol,
+          let XCTestObservationCenter = XCTestObservationCenter as Any as? any NSObjectProtocol,
           let XCTestObservationCenterShared =
             XCTestObservationCenter
             .perform(Selector(("sharedTestObservationCenter")))?

Sources/Dependencies/DependencyValues/Assert.swift

@@ -1,3 +1,5 @@
+import IssueReporting
+
 extension DependencyValues {
   /// A dependency for handling assertions.
   ///

Sources/Dependencies/DependencyValues/Calendar.swift

@@ -1,47 +1,47 @@
 #if Foundation
-import Foundation
+  public import Foundation
 
-extension DependencyValues {
-  /// The current calendar that features should use when handling dates.
-  ///
-  /// By default, the calendar returned from `Calendar.autoupdatingCurrent` is supplied. When used
-  /// in a testing context, access will call to `reportIssue` when invoked, unless explicitly
-  /// overridden using ``withDependencies(_:operation:)-4uz6m``:
-  ///
-  /// ```swift
-  /// // Provision model with overridden dependencies
-  /// let model = withDependencies {
-  ///   $0.calendar = Calendar(identifier: .gregorian)
-  /// } operation: {
-  ///   FeatureModel()
-  /// }
-  ///
-  /// // Make assertions with model...
-  /// ```
-  public var calendar: Calendar {
-    get {
-      #if canImport(Darwin)
-        self[CalendarKey.self]
-      #else
-        self[CalendarKey.self].wrappedValue
-      #endif
+  extension DependencyValues {
+    /// The current calendar that features should use when handling dates.
+    ///
+    /// By default, the calendar returned from `Calendar.autoupdatingCurrent` is supplied. When used
+    /// in a testing context, access will call to `reportIssue` when invoked, unless explicitly
+    /// overridden using ``withDependencies(_:operation:)-4uz6m``:
+    ///
+    /// ```swift
+    /// // Provision model with overridden dependencies
+    /// let model = withDependencies {
+    ///   $0.calendar = Calendar(identifier: .gregorian)
+    /// } operation: {
+    ///   FeatureModel()
+    /// }
+    ///
+    /// // Make assertions with model...
+    /// ```
+    public var calendar: Calendar {
+      get {
+        #if canImport(Darwin)
+          self[CalendarKey.self]
+        #else
+          self[CalendarKey.self].wrappedValue
+        #endif
+      }
+      set {
+        #if canImport(Darwin)
+          self[CalendarKey.self] = newValue
+        #else
+          self[CalendarKey.self].wrappedValue = newValue
+        #endif
+      }
     }
-    set {
+
+    private enum CalendarKey: DependencyKey {
       #if canImport(Darwin)
-        self[CalendarKey.self] = newValue
+        static let liveValue = Calendar.autoupdatingCurrent
       #else
-        self[CalendarKey.self].wrappedValue = newValue
+        // NB: 'Calendar' sendability is not yet available in a 'swift-corelibs-foundation' release
+        static let liveValue = UncheckedSendable(Calendar.autoupdatingCurrent)
       #endif
     }
   }
-
-  private enum CalendarKey: DependencyKey {
-    #if canImport(Darwin)
-      static let liveValue = Calendar.autoupdatingCurrent
-    #else
-      // NB: 'Calendar' sendability is not yet available in a 'swift-corelibs-foundation' release
-      static let liveValue = UncheckedSendable(Calendar.autoupdatingCurrent)
-    #endif
-  }
-}
 #endif