Swift Language Support: Drop <5.9, Add 6.0

.github/workflows/ci.yml

@@ -16,27 +16,11 @@ concurrency:
 jobs:
   macos-14:
     name: macOS 14 (Xcode ${{ matrix.xcode }})
-    runs-on: macOS-13
+    runs-on: macOS-14
     strategy:
       matrix:
         xcode:
-          - '15.2'
-    steps:
-      - uses: actions/checkout@v4
-      - name: Select Xcode ${{ matrix.xcode }}
-        run: sudo xcode-select -s /Applications/Xcode_${{ matrix.xcode }}.app
-      - name: Print Swift version
-        run: swift --version
-      - name: Run tests (platforms)
-        run: make test-platforms
-
-  macos-13:
-    name: macOS 13 (Xcode ${{ matrix.xcode }})
-    runs-on: macOS-13
-    strategy:
-      matrix:
-        xcode:
-          - '14.3.1'
+          - '15.4'
     steps:
       - uses: actions/checkout@v4
       - name: Select Xcode ${{ matrix.xcode }}

Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version:5.7
+// swift-tools-version: 5.9
 
 import PackageDescription
 
@@ -24,6 +24,9 @@ let package = Package(
       name: "CustomDump",
       dependencies: [
         .product(name: "XCTestDynamicOverlay", package: "xctest-dynamic-overlay")
+      ],
+      swiftSettings: [
+        .enableExperimentalFeature("StrictConcurrency")
       ]
     ),
     .testTarget(

Package@swift-5.9.swift → Package@swift-6.0.swift

@@ -1,4 +1,4 @@
-// swift-tools-version:5.9
+// swift-tools-version: 6.0
 
 import PackageDescription
 
@@ -24,9 +24,6 @@ let package = Package(
       name: "CustomDump",
       dependencies: [
         .product(name: "XCTestDynamicOverlay", package: "xctest-dynamic-overlay")
-      ],
-      swiftSettings: [
-        .enableExperimentalFeature("StrictConcurrency")
       ]
     ),
     .testTarget(

Sources/CustomDump/Conformances/KeyPath.swift

@@ -2,12 +2,9 @@ import Foundation
 
 extension AnyKeyPath: CustomDumpStringConvertible {
   public var customDumpDescription: String {
-    // NB: We gate this to 5.9+ due to this crasher: https://github.com/apple/swift/issues/64865
-    #if swift(>=5.9)
-      if #available(macOS 13.3, iOS 16.4, watchOS 9.4, tvOS 16.4, *) {
-        return self.debugDescription
-      }
-    #endif
+    if #available(macOS 13.3, iOS 16.4, watchOS 9.4, tvOS 16.4, *) {
+      return self.debugDescription
+    }
     return """
       \(typeName(Self.self))<\
       \(typeName(Self.rootType, genericsAbbreviated: false)), \

Sources/CustomDump/Conformances/Swift.swift

@@ -6,7 +6,7 @@ extension Character: CustomDumpRepresentable {
   }
 }
 
-#if (swift(>=5.7) && !targetEnvironment(macCatalyst) && (os(iOS) || os(tvOS) || os(watchOS))) || (swift(>=5.7.1) && os(macOS))
+#if os(iOS) || os(macOS) || os(tvOS) || os(watchOS)
   @available(macOS 13, iOS 16, watchOS 9, tvOS 16, *)
   extension Duration: CustomDumpStringConvertible {
     public var customDumpDescription: String {

Sources/CustomDump/Conformances/UserNotifications.swift

@@ -29,7 +29,7 @@
           switch self.rawValue {
           case .alert:
             return "UNAuthorizationOptions.alert"
-          #if (os(iOS) || os(watchOS)) && (swift(<5.9) || !canImport(CompositorServices))
+          #if os(iOS) || os(watchOS)
             case .announcement:
               return "UNAuthorizationOptions.announcement"
           #endif
@@ -56,7 +56,7 @@
       var allCases: [UNAuthorizationOptions] = [
         .alert
       ]
-      #if (os(iOS) || os(watchOS)) && (swift(<5.9) || !canImport(CompositorServices))
+      #if os(iOS) || os(watchOS)
         allCases.append(.announcement)
       #endif
       allCases.append(contentsOf: [
@@ -132,11 +132,9 @@
       struct Option: CustomDumpStringConvertible {
         var rawValue: UNNotificationPresentationOptions
         var customDumpDescription: String {
-          #if swift(<5.9) || !canImport(CompositorServices)
-            if self.rawValue == .alert {
-              return "UNNotificationPresentationOptions.alert"
-            }
-          #endif
+          if self.rawValue == .alert {
+            return "UNNotificationPresentationOptions.alert"
+          }
           if self.rawValue == .badge {
             return "UNNotificationPresentationOptions.badge"
           }
@@ -155,8 +153,10 @@
 
       var options = self
       var children: [Option] = []
-      var allCases: [UNNotificationPresentationOptions] = []
-      appendBannerList(&allCases)
+      var allCases: [UNNotificationPresentationOptions] = [.alert, .badge]
+      if #available(iOS 14, macOS 11, tvOS 14, watchOS 7, *) {
+        allCases.append(contentsOf: [.banner, .list])
+      }
       allCases.append(.sound)
       for option in allCases {
         if options.contains(option) {
@@ -174,19 +174,6 @@
         displayStyle: .set
       )
     }
-
-    // NB: Workaround for Xcode 13.2's new, experimental build system.
-    //
-    //     defaults write com.apple.dt.XCBuild EnableSwiftBuildSystemIntegration 1
-    private func appendBannerList(_ allCases: inout [UNNotificationPresentationOptions]) {
-      #if swift(<5.9) || !canImport(CompositorServices)
-        allCases.append(.alert)
-      #endif
-      allCases.append(.badge)
-      if #available(iOS 14, macOS 11, tvOS 14, watchOS 7, *) {
-        allCases.append(contentsOf: [.banner, .list])
-      }
-    }
   }
 
   @available(iOS 10, macOS 10.14, tvOS 10, watchOS 3, *)

Sources/CustomDump/Diff.swift

@@ -207,7 +207,7 @@ public func diff<T>(_ lhs: T, _ rhs: T, format: DiffFormat = .default) -> String
         to: &out
       )
 
-      if let areInIncreasingOrder = areInIncreasingOrder {
+      if let areInIncreasingOrder {
         lhsChildren.sort(by: areInIncreasingOrder)
         rhsChildren.sort(by: areInIncreasingOrder)
       }
@@ -692,8 +692,8 @@ public func diff<T>(_ lhs: T, _ rhs: T, format: DiffFormat = .default) -> String
       )
 
     default:
-      if let lhs = stringFromStringProtocol(lhs),
-        let rhs = stringFromStringProtocol(rhs),
+      if let lhs = String(stringProtocol: lhs),
+        let rhs = String(stringProtocol: rhs),
         lhs.contains(where: \.isNewline) || rhs.contains(where: \.isNewline)
       {
         let lhsMirror = Mirror(

Sources/CustomDump/Dump.swift

@@ -411,7 +411,7 @@ func _customDump<T, TargetStream>(
       )
 
     default:
-      if let value = stringFromStringProtocol(value) {
+      if let value = String(stringProtocol: value) {
         if value.contains(where: \.isNewline) {
           if maxDepth <= 0 {
             out.write("\"…\"")

Sources/CustomDump/Internal/Identifiable.swift

@@ -0,0 +1,8 @@
+func isIdentityEqual(_ lhs: Any, _ rhs: Any) -> Bool {
+  guard let lhs = lhs as? any Identifiable else { return false }
+  func open<LHS: Identifiable>(_ lhs: LHS) -> Bool {
+    guard let rhs = rhs as? LHS else { return false }
+    return lhs.id == rhs.id
+  }
+  return open(lhs)
+}

Sources/CustomDump/Internal/Mirror.swift

@@ -25,3 +25,30 @@ extension Mirror {
     }
   }
 }
+
+func isMirrorEqual(_ lhs: Any, _ rhs: Any) -> Bool {
+  guard let lhs = lhs as? any Equatable else {
+    let lhsMirror = Mirror(customDumpReflecting: lhs)
+    let rhsMirror = Mirror(customDumpReflecting: rhs)
+    guard
+      lhsMirror.subjectType == rhsMirror.subjectType,
+      lhsMirror.children.count == rhsMirror.children.count
+    else { return false }
+    guard !lhsMirror.children.isEmpty, !rhsMirror.children.isEmpty
+    else {
+      return String(describing: lhs) == String(describing: rhs)
+    }
+    for (lhsChild, rhsChild) in zip(lhsMirror.children, rhsMirror.children) {
+      guard
+        lhsChild.label == rhsChild.label,
+        isMirrorEqual(lhsChild.value, rhsChild.value)
+      else { return false }
+    }
+    return true
+  }
+  func open<T: Equatable>(_ lhs: T) -> Bool {
+    guard let rhs = rhs as? T else { return false }
+    return lhs == rhs
+  }
+  return open(lhs)
+}

Sources/CustomDump/Internal/String.swift

@@ -1,6 +1,11 @@
 import Foundation
 
 extension String {
+  init?(stringProtocol value: Any) {
+    guard let value = value as? any StringProtocol else { return nil }
+    self.init(value)
+  }
+
   func indenting(by count: Int) -> String {
     self.indenting(with: String(repeating: " ", count: count))
   }

Tests/CustomDumpTests/DumpTests.swift

@@ -708,7 +708,7 @@ final class DumpTests: XCTestCase {
   }
 
   func testKeyPath() {
-    // NB: While this should run on >=5.9, it currently crashes CI on Xcode 15.2
+    // NB: While this should run on >=5.9, it currently crashes CI on Xcode 15
     #if swift(>=5.10) && (os(iOS) || os(macOS) || os(tvOS) || os(watchOS))
       var dump = ""
       if #available(macOS 13.3, iOS 16.4, watchOS 9.4, tvOS 16.4, *) {
@@ -1184,7 +1184,7 @@ final class DumpTests: XCTestCase {
     )
   }
 
-  #if (swift(>=5.7) && !targetEnvironment(macCatalyst) && (os(iOS) || os(tvOS) || os(watchOS))) || (swift(>=5.7.1) && os(macOS))
+  #if os(iOS) || os(macOS) || os(tvOS) || os(watchOS)
     func testDuration() {
       guard #available(macOS 13, iOS 16, watchOS 9, tvOS 16, *) else { return }