Merge pull request swiftlang#1371 from swiftlang/automerge/merge-main-2025-06-23_09-02

Merge `main` into `release/6.2`

Author: parkera

.github/workflows/pull_request.yml

@@ -9,7 +9,7 @@ on:
 
 jobs:
   tests:
-    name: Test
+    name: Test (SwiftPM)
     uses: swiftlang/github-workflows/.github/workflows/swift_package_test.yml@main
     with:
       linux_swift_versions: '["nightly-main"]'
@@ -18,6 +18,23 @@ jobs:
       macos_xcode_versions: '["16.3"]'
       macos_versions: '["sequoia"]'
 
+  cmake_build:
+    name: Build (CMake)
+    runs-on: ubuntu-latest
+    container: swiftlang/swift:nightly-main-noble
+    steps:
+      - name: Checkout Sources
+        uses: actions/checkout@v1
+      - name: Install Dependencies
+        shell: bash
+        run: apt update && apt install -y cmake ninja-build
+      - name: Configure Project
+        shell: bash
+        run: cmake -G 'Ninja' -B build -S . -DCMAKE_C_COMPILER=clang -DCMAKE_Swift_COMPILER=swiftc -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=YES
+      - name: Build Project
+        shell: bash
+        run: cmake --build build
+
   soundness:
     name: Soundness
     uses: swiftlang/github-workflows/.github/workflows/soundness.yml@main

CMakeLists.txt

@@ -75,7 +75,7 @@ else()
     message(STATUS "_SwiftFoundationICU_SourceDIR not provided, checking out local copy of swift-foundation-icu")
     FetchContent_Declare(SwiftFoundationICU
         GIT_REPOSITORY https://github.com/apple/swift-foundation-icu.git
-        GIT_TAG 0.0.9)
+        GIT_TAG main)
 endif()
 
 if (_SwiftCollections_SourceDIR)

Package.swift

@@ -150,14 +150,6 @@ let package = Package(
           swiftSettings: [
             .enableExperimentalFeature("VariadicGenerics"),
             .enableExperimentalFeature("LifetimeDependence"),
-            .enableExperimentalFeature(
-              "InoutLifetimeDependence",
-              .when(platforms: [.macOS, .iOS, .watchOS, .tvOS, .linux])
-            ),
-            .enableExperimentalFeature(
-              "LifetimeDependenceMutableAccessors",
-              .when(platforms: [.macOS, .iOS, .watchOS, .tvOS, .linux])
-            ),
             .enableExperimentalFeature("AddressableTypes"),
             .enableExperimentalFeature("AllowUnsafeAttribute"),
             .enableExperimentalFeature("BuiltinModule"),
@@ -176,16 +168,7 @@ let package = Package(
             resources: [
                 .copy("Resources")
             ],
-            swiftSettings: [
-              .enableExperimentalFeature(
-                "InoutLifetimeDependence",
-                .when(platforms: [.macOS, .iOS, .watchOS, .tvOS, .linux])
-              ),
-              .enableExperimentalFeature(
-                "LifetimeDependenceMutableAccessors",
-                .when(platforms: [.macOS, .iOS, .watchOS, .tvOS, .linux])
-              ),
-            ] + availabilityMacros + featureSettings + testOnlySwiftSettings
+            swiftSettings: availabilityMacros + featureSettings + testOnlySwiftSettings
         ),
 
         // FoundationInternationalization

Proposals/0028-locale-region-category.md

@@ -4,8 +4,8 @@
 * Authors: [Tina Liu](https://github.com/itingliu)
 * Review Manager: [Jeremy Schonfeld](https://github.com/jmschonfeld)
 * Implementation: [https://github.com/swiftlang/swift-foundation/pull/1253]()
-* Status: **Review: Jun 11, 2025...Jun 18, 2025**
-* Reviews: [Pitch](https://forums.swift.org/t/pitch-category-support-for-locale-region/79240)
+* Status: **Accepted**
+* Reviews: [Pitch](https://forums.swift.org/t/pitch-category-support-for-locale-region/79240), [Review](https://forums.swift.org/t/review-sf-0028-locale-region-category/80415)
 
 ## Introduction
 

Sources/FoundationEssentials/CMakeLists.txt

@@ -74,9 +74,7 @@ endif()
 
 if(CMAKE_SYSTEM_NAME STREQUAL Linux OR CMAKE_SYSTEM_NAME STREQUAL Android)
     target_compile_options(FoundationEssentials PRIVATE
-        "SHELL:$<$<COMPILE_LANGUAGE:Swift>:-Xfrontend -Xcc -Xfrontend -D_GNU_SOURCE>"
-        "SHELL:$<$<COMPILE_LANGUAGE:Swift>:-Xfrontend -enable-experimental-feature -Xfrontend InoutLifetimeDependence>"
-        "SHELL:$<$<COMPILE_LANGUAGE:Swift>:-Xfrontend -enable-experimental-feature -Xfrontend LifetimeDependenceMutableAccessors>")
+        "SHELL:$<$<COMPILE_LANGUAGE:Swift>:-Xfrontend -Xcc -Xfrontend -D_GNU_SOURCE>")
     list(APPEND CMAKE_REQUIRED_DEFINITIONS -D_GNU_SOURCE)
 endif()
 

Sources/FoundationEssentials/Data/Data.swift

@@ -2203,11 +2203,7 @@ public struct Data : Equatable, Hashable, RandomAccessCollection, MutableCollect
         return try _representation.withUnsafeBytes(body)
     }
 
-#if compiler(>=6.2) && $LifetimeDependence
     @available(FoundationSpan 6.2, *)
-#if FOUNDATION_FRAMEWORK
-    @_disfavoredOverload
-#endif // FOUNDATION_FRAMEWORK
     public var bytes: RawSpan {
         @lifetime(borrow self)
         borrowing get {
@@ -2242,9 +2238,7 @@ public struct Data : Equatable, Hashable, RandomAccessCollection, MutableCollect
             return _overrideLifetime(span, borrowing: self)
         }
     }
-#endif
 
-#if compiler(>=5.9) && $InoutLifetimeDependence && $LifetimeDependenceMutableAccessors
     @available(FoundationSpan 6.2, *)
     public var mutableBytes: MutableRawSpan {
         @lifetime(&self)
@@ -2304,7 +2298,6 @@ public struct Data : Equatable, Hashable, RandomAccessCollection, MutableCollect
 #endif
         }
     }
-#endif // $InoutLifetimeDependence && $LifetimeDependenceMutableAccessors
 
     @_alwaysEmitIntoClient
     public func withContiguousStorageIfAvailable<ResultType>(_ body: (_ buffer: UnsafeBufferPointer<UInt8>) throws -> ResultType) rethrows -> ResultType? {
@@ -2979,7 +2972,6 @@ extension Data : Codable {
 }
 
 // TODO: remove once _overrideLifetime is public in the standard library
-#if compiler(>=6.2) && $LifetimeDependence
 /// Unsafely discard any lifetime dependency on the `dependent` argument. Return
 /// a value identical to `dependent` with a lifetime dependency on the caller's
 /// borrow scope of the `source` argument.
@@ -3011,9 +3003,7 @@ internal func _overrideLifetime<
 ) -> T {
   dependent
 }
-#endif
 
-#if compiler(>=5.9) && $InoutLifetimeDependence && $LifetimeDependenceMutableAccessors
 /// Unsafely discard any lifetime dependency on the `dependent` argument.
 /// Return a value identical to `dependent` with a lifetime dependency
 /// on the caller's exclusive borrow scope of the `source` argument.
@@ -3030,4 +3020,3 @@ internal func _overrideLifetime<
 ) -> T {
   dependent
 }
-#endif // $InoutLifetimeDependence && $LifetimeDependenceMutableAccessors

Sources/FoundationEssentials/String/String+IO.swift

@@ -24,6 +24,11 @@ dynamic public func _cfMakeStringFromBytes(_ bytes: UnsafeBufferPointer<UInt8>,
     // Provide swift-corelibs-foundation with an entry point to convert some bytes into a String
     return nil
 }
+
+dynamic package func _icuMakeStringFromBytes(_ bytes: UnsafeBufferPointer<UInt8>, encoding: String.Encoding) -> String? {
+    // Concrete implementation is provided by FoundationInternationalization.
+    return nil
+}
 #endif
 
 @available(macOS 10.10, iOS 8.0, watchOS 2.0, tvOS 9.0, *)
@@ -184,6 +189,17 @@ extension String {
                 }
             }
             self = bytes.withContiguousStorageIfAvailable(buildString) ?? Array(bytes).withUnsafeBufferPointer(buildString)
+        case .japaneseEUC:
+            // Here we catch encodings that are supported by Foundation Framework
+            // but are not supported by corelibs-foundation.
+            // We delegate conversion to ICU.
+            guard let string = (
+                bytes.withContiguousStorageIfAvailable({ _icuMakeStringFromBytes($0, encoding: encoding) }) ??
+                Array(bytes).withUnsafeBufferPointer({ _icuMakeStringFromBytes($0, encoding: encoding) })
+            ) else {
+                return nil
+            }
+            self = string
         #endif
         default:
 #if FOUNDATION_FRAMEWORK

Sources/FoundationEssentials/String/StringProtocol+Essentials.swift

@@ -91,6 +91,11 @@ dynamic public func _cfStringEncodingConvert(string: String, using encoding: UIn
     // Dynamically replaced by swift-corelibs-foundation to implement encodings that we do not have Swift replacements for, yet
     return nil
 }
+
+dynamic package func _icuStringEncodingConvert(string: String, using encoding: String.Encoding, allowLossyConversion: Bool) -> Data? {
+    // Concrete implementation is provided by FoundationInternationalization.
+    return nil
+}
 #endif
 
 @available(FoundationPreview 0.4, *)
@@ -249,6 +254,11 @@ extension String {
                     buffer.appendElement(value)
                 }
             }
+        case .japaneseEUC:
+            // Here we catch encodings that are supported by Foundation Framework
+            // but are not supported by corelibs-foundation.
+            // We delegate conversion to ICU.
+            return _icuStringEncodingConvert(string: self, using: encoding, allowLossyConversion: allowLossyConversion)
 #endif
         default:
 #if FOUNDATION_FRAMEWORK