Merge pull request #78857 from Azoy/wordpair-comparable

[stdlib] Add Comparable conformance to WordPair

Author: Azoy

stdlib/public/Synchronization/Atomics/WordPair.swift

@@ -183,6 +183,16 @@ extension WordPair: Hashable {
   }
 }
 
+@available(SwiftStdlib 6.2, *)
+extension WordPair: Comparable {
+  @available(SwiftStdlib 6.2, *)
+  @_alwaysEmitIntoClient
+  @_transparent
+  public static func <(lhs: WordPair, rhs: WordPair) -> Bool {
+    (lhs.first, lhs.second) < (rhs.first, rhs.second)
+  }
+}
+
 @available(SwiftStdlib 6.0, *)
 @_unavailableInEmbedded
 extension WordPair: CustomStringConvertible {

test/abi/macOS/arm64/synchronization.swift

@@ -698,3 +698,6 @@ Added: _$s15Synchronization20AtomicUpdateOrderingV22sequentiallyConsistentACvpZM
 Added: _$s15Synchronization20AtomicUpdateOrderingV7relaxedACvpZMV
 Added: _$s15Synchronization20AtomicUpdateOrderingV9acquiringACvpZMV
 Added: _$s15Synchronization20AtomicUpdateOrderingV9releasingACvpZMV
+
+// WordPair to Comparable conformance
+Added: _$s15Synchronization8WordPairVSLAAMc

test/abi/macOS/x86_64/synchronization.swift

@@ -692,3 +692,6 @@ Added: _$s15Synchronization20AtomicUpdateOrderingV22sequentiallyConsistentACvpZM
 Added: _$s15Synchronization20AtomicUpdateOrderingV7relaxedACvpZMV
 Added: _$s15Synchronization20AtomicUpdateOrderingV9acquiringACvpZMV
 Added: _$s15Synchronization20AtomicUpdateOrderingV9releasingACvpZMV
+
+// WordPair to Comparable conformance
+Added: _$s15Synchronization8WordPairVSLAAMc

test/stdlib/Synchronization/Atomics/WordPair.swift

@@ -49,4 +49,22 @@ suite.test("basics") {
 
 } // if #available(SwiftStdlib 6.0, *)
 
+if #available(SwiftStdlib 6.2, *) {
+suite.test("comparable") {
+  let c0 = WordPair(first: 0, second: 0)
+  let c1 = WordPair(first: 1, second: 0)
+  let c2 = WordPair(first: 2, second: 0)
+  let c3 = WordPair(first: 0, second: 1)
+  let c4 = WordPair(first: 1, second: 2)
+  let c5 = WordPair(first: 2, second: 1)
+  expectFalse(c0 < c0)
+  expectTrue(c0 < c1)
+  expectTrue(c0 < c2)
+  expectTrue(c0 < c3)
+  expectFalse(c1 < c0)
+  expectTrue(c4 < c5)
+  expectFalse(c5 < c4)
+}
+} // if #available(SwiftStdlib 6.2, *)
+
 runAllTests()