Cherry pick recent PRs destined for 1.2

CMakeLists.txt

@@ -7,10 +7,6 @@ Licensed under Apache License v2.0 with Runtime Library Exception
 See https://swift.org/LICENSE.txt for license information
 #]]
 
-if(POLICY CMP0091)
-  cmake_policy(SET CMP0091 NEW)
-endif()
-
 cmake_minimum_required(VERSION 3.16)
 project(SwiftCollections
   LANGUAGES C Swift)
@@ -28,6 +24,8 @@ if(NOT SWIFT_SYSTEM_NAME)
   endif()
 endif()
 
+include(PlatformInfo)
+
 set(CMAKE_Swift_MODULE_DIRECTORY ${CMAKE_BINARY_DIR}/swift)
 set(CMAKE_Swift_COMPILE_OPTIONS_MSVC_RUNTIME_LIBRARY MultiThreadedDLL)
 

Sources/CMakeLists.txt

@@ -42,10 +42,10 @@ if(COLLECTIONS_SINGLE_MODULE)
     endif()
     install(FILES $<TARGET_PROPERTY:${COLLECTIONS_MODULE_NAME},Swift_MODULE_DIRECTORY>/${COLLECTIONS_MODULE_NAME}.swiftdoc
       DESTINATION lib/${swift}/${swift_os}/${COLLECTIONS_MODULE_NAME}.swiftmodule
-      RENAME ${Swift_MODULE_TRIPLE}.swiftdoc)
+      RENAME ${SwiftCollections_MODULE_TRIPLE}.swiftdoc)
     install(FILES $<TARGET_PROPERTY:${COLLECTIONS_MODULE_NAME},Swift_MODULE_DIRECTORY>/${COLLECTIONS_MODULE_NAME}.swiftmodule
       DESTINATION lib/${swift}/${swift_os}/${COLLECTIONS_MODULE_NAME}.swiftmodule
-      RENAME ${Swift_MODULE_TRIPLE}.swiftmodule)
+      RENAME ${SwiftCollections_MODULE_TRIPLE}.swiftmodule)
   else()
     _install_target(${COLLECTIONS_MODULE_NAME})
   endif()

Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift

@@ -92,10 +92,15 @@ extension _HashNode.Storage {
       bytes += itemAlignment - childAlignment
     }
 
+    let mincap = (bytes &+ childStride &- 1) / childStride
     let object = _HashNode.Storage.create(
-      minimumCapacity: (bytes &+ childStride &- 1) / childStride
+      minimumCapacity: mincap
     ) { buffer in
+#if os(OpenBSD)
+      _HashNodeHeader(byteCapacity: mincap * childStride)
+#else
       _HashNodeHeader(byteCapacity: buffer.capacity * childStride)
+#endif
     }
 
     object.withUnsafeMutablePointers { header, elements in

Sources/HashTreeCollections/HashNode/_HashTreeStatistics.swift

@@ -118,8 +118,7 @@ extension _HashNode {
       // Note: for simplicity, we assume that there is no padding between
       // the object header and the storage header.
       let start = _getUnsafePointerToStoredProperties(self.raw.storage)
-      let capacity = self.raw.storage.capacity
-      let end = $0._memory + capacity * MemoryLayout<_RawHashNode>.stride
+      let end = $0._memory + $0.byteCapacity
       stats.grossBytes += objectHeaderSize + (end - start)
 
       for child in $0.children {

Sources/HeapModule/Heap+UnsafeHandle.swift

@@ -81,12 +81,17 @@ extension Heap._UnsafeHandle {
 
   @inlinable @inline(__always)
   internal func minValue(_ a: _HeapNode, _ b: _HeapNode) -> _HeapNode {
-    self[a] < self[b] ? a : b
+    // The expression used here matches the implementation of the
+    // standard `Swift.min(_:_:)` function. This attempts to
+    // preserve any pre-existing order in case `T` has identity.
+    // `(min(x, y), max(x, y))` should return `(x, y)` in case `x == y`.
+    self[b] < self[a] ? b : a
   }
 
   @inlinable @inline(__always)
   internal func maxValue(_ a: _HeapNode, _ b: _HeapNode) -> _HeapNode {
-    self[a] < self[b] ? b : a
+    //  In case `a` and `b` match, we need to pick `b`. See `minValue(_:_:)`.
+    self[b] >= self[a] ? b : a
   }
 }
 

Sources/HeapModule/Heap.swift

@@ -212,7 +212,7 @@ extension Heap {
           handle.swapAt(.leftMax, with: &removed)
         }
       } else {
-        let maxNode = handle.maxValue(.rightMax, .leftMax)
+        let maxNode = handle.maxValue(.leftMax, .rightMax)
         handle.swapAt(maxNode, with: &removed)
         handle.trickleDownMax(maxNode)
       }
@@ -268,6 +268,28 @@ extension Heap {
     _checkInvariants()
     return removed
   }
+
+  /// Removes all the elements that satisfy the given predicate.
+  ///
+  /// - Parameter shouldBeRemoved: A closure that takes an element of the
+  ///   heap as its argument and returns a Boolean value indicating
+  ///   whether the element should be removed from the heap.
+  ///
+  /// - Complexity: O(*n*), where *n* is the number of items in the heap.
+  @inlinable
+  public mutating func removeAll(
+    where shouldBeRemoved: (Element) throws -> Bool
+  ) rethrows {
+    defer {
+      if _storage.count > 1 {
+        _update { handle in
+          handle.heapify()
+        }
+      }
+      _checkInvariants()
+    }
+    try _storage.removeAll(where: shouldBeRemoved)
+  }
 
   /// Replaces the maximum value in the heap with the given replacement,
   /// then updates heap contents to reflect the change.

Sources/OrderedCollections/OrderedSet/OrderedSet+Partial SetAlgebra union.swift

@@ -81,5 +81,28 @@ extension OrderedSet {
     result.formUnion(other)
     return result
   }
+
+  /// Returns a new set with the contents of a sequence appended to the end of the set, excluding
+  /// elements that are already members.
+  ///
+  ///     let a: OrderedSet = [1, 2, 3, 4]
+  ///     let b: OrderedSet = [0, 2, 4, 6]
+  ///     a.union(b) // [1, 2, 3, 4, 0, 6]
+  ///
+  /// This is functionally equivalent to `self.union(elements)`, but it's
+  /// more explicit about how the new members are ordered in the new set.
+  ///
+  /// - Parameter elements: A finite sequence of elements to append.
+  ///
+  /// - Complexity: Expected to be O(`self.count` + `elements.count`) on average,
+  ///    if `Element` implements high-quality hashing.
+  @inlinable
+  public __consuming func appending(
+    contentsOf elements: __owned some Sequence<Element>
+  ) -> Self {
+    var result = self
+    result.append(contentsOf: elements)
+    return result
+  }
 }
 

Tests/HeapTests/HeapTests.swift

@@ -587,4 +587,121 @@ final class HeapTests: CollectionTestCase {
       }
     }
   }
+
+  struct Distinguishable: Comparable, CustomStringConvertible {
+    var value: Int
+    var id: Int
+
+    static func ==(left: Self, right: Self) -> Bool {
+      left.value == right.value
+    }
+    static func <(left: Self, right: Self) -> Bool {
+      left.value < right.value
+    }
+    var description: String { "\(value)/\(id)" }
+  }
+
+  func test_tieBreaks_min() {
+    var heap: Heap = [
+      Distinguishable(value: 1, id: 1),
+      Distinguishable(value: 1, id: 2),
+      Distinguishable(value: 1, id: 3),
+      Distinguishable(value: 1, id: 4),
+      Distinguishable(value: 1, id: 5),
+    ]
+    while !heap.isEmpty {
+      let oldID = heap.min!.id
+      let newID = 10 * oldID
+      let old = heap.replaceMin(with: Distinguishable(value: 1, id: newID))
+      expectEqual(old.id, oldID)
+      expectEqual(heap.min?.id, 10 * oldID)
+      expectNotNil(heap.removeMin()) { min in
+        expectEqual(min.id, newID)
+      }
+    }
+  }
+
+  func test_tieBreaks_max() {
+    var heap: Heap = [
+      Distinguishable(value: 1, id: 1),
+      Distinguishable(value: 1, id: 2),
+      Distinguishable(value: 1, id: 3),
+      Distinguishable(value: 1, id: 4),
+      Distinguishable(value: 1, id: 5),
+    ]
+    while !heap.isEmpty {
+      let oldID = heap.max!.id
+      let newID = 10 * oldID
+      print(heap.unordered)
+      let old = heap.replaceMax(with: Distinguishable(value: 1, id: newID))
+      expectEqual(old.id, oldID)
+      expectEqual(heap.max?.id, 10 * oldID)
+      expectNotNil(heap.removeMax()) { max in
+        expectEqual(max.id, newID)
+      }
+    }
+  }
+
+  func test_removeAll_noneRemoved() {
+    withEvery("count", in: 0 ..< 20) { count in
+      withEvery("seed", in: 0 ..< 10) { seed in
+        var rng = RepeatableRandomNumberGenerator(seed: seed)
+        let input = (0 ..< count).shuffled(using: &rng)
+        var heap = Heap(input)
+        heap.removeAll { _ in false }
+        let expected = Array(0 ..< count)
+        expectEqualElements(heap.itemsInAscendingOrder(), expected)
+      }
+    }
+  }
+
+  func test_removeAll_allRemoved() {
+    withEvery("count", in: 0 ..< 20) { count in
+      withEvery("seed", in: 0 ..< 10) { seed in
+        var rng = RepeatableRandomNumberGenerator(seed: seed)
+        let input = (0 ..< count).shuffled(using: &rng)
+        var heap = Heap(input)
+        heap.removeAll { _ in true }
+        expectTrue(heap.isEmpty)
+      }
+    }
+  }
+
+  func test_removeAll_removeEvenNumbers() {
+    withEvery("count", in: 0 ..< 20) { count in
+      withEvery("seed", in: 0 ..< 10) { seed in
+        var rng = RepeatableRandomNumberGenerator(seed: seed)
+        let input = (0 ..< count).shuffled(using: &rng)
+        var heap = Heap(input)
+        heap.removeAll { $0 % 2 == 0 }
+        let expected = Array(stride(from: 1, to: count, by: 2))
+        expectEqualElements(heap.itemsInAscendingOrder(), expected)
+      }
+    }
+  }
+
+  func test_removeAll_throw() throws {
+    struct DummyError: Error {}
+
+    try withEvery("count", in: 1 ..< 20) { count in
+      try withEvery("seed", in: 0 ..< 10) { seed in
+        var rng = RepeatableRandomNumberGenerator(seed: seed)
+        let input = (0 ..< count).shuffled(using: &rng)
+        var heap = Heap(input)
+        expectThrows(
+          try heap.removeAll { v in
+            if v == count / 2 {
+              throw DummyError()
+            }
+            return v % 2 == 0
+          }
+        ) { error in
+          expectTrue(error is DummyError)
+        }
+        // Throwing halfway through `removeAll` is expected to reorder items,
+        // but not remove any.
+        expectEqualElements(heap.itemsInAscendingOrder(), 0 ..< count)
+      }
+    }
+  }
 }

Tests/OrderedCollectionsTests/OrderedSet/OrderedSetTests.swift

@@ -961,6 +961,20 @@ class OrderedSetTests: CollectionTestCase {
     }
   }
 
+  func test_appending_Self() {
+    withSampleRanges { r1, r2 in
+      let expected = Set(r1).union(r2).sorted()
+
+      let u1 = OrderedSet(r1)
+      let u2 = OrderedSet(r2)
+      let actual1 = u1.appending(contentsOf: u2)
+      expectEqualElements(actual1, expected)
+
+      let actual2 = actual1.appending(contentsOf: u2).appending(contentsOf: u1)
+      expectEqualElements(actual2, expected)
+    }
+  }
+
   func test_formUnion_Self() {
     withSampleRanges { r1, r2 in
       let expected = Set(r1).union(r2).sorted()

cmake/modules/PlatformInfo.cmake

@@ -0,0 +1,24 @@
+#[[
+This source file is part of the Swift Collections Open Source Project
+
+Copyright (c) 2025 Apple Inc. and the Swift project authors
+Licensed under Apache License v2.0 with Runtime Library Exception
+
+See https://swift.org/LICENSE.txt for license information
+#]]
+
+set(target_info_cmd "${CMAKE_Swift_COMPILER}" -print-target-info)
+if(CMAKE_Swfit_COMPILER_TARGET)
+  list(APPEND target_info_cmd -target ${CMAKE_Swift_COMPILER_TARGET})
+endif()
+execute_process(COMMAND ${target_info_cmd} OUTPUT_VARIABLE target_info_json)
+message(CONFIGURE_LOG "Swift target info: ${target_info_cmd}\n"
+"${target_info_json}")
+
+if(NOT SwiftCollections_MODULE_TRIPLE)
+  string(JSON module_triple GET "${target_info_json}" "target" "moduleTriple")
+  set(SwiftCollections_MODULE_TRIPLE "${module_triple}" CACHE STRING "Triple used for installed swift{doc,module, interface} files")
+  mark_as_advanced(SwiftCollections_MODULE_TRIPLE)
+
+  message(CONFIGURE_LOG "Swift module triple: ${module_triple}")
+endif()

cmake/modules/SwiftSupport.cmake

@@ -7,55 +7,6 @@ Licensed under Apache License v2.0 with Runtime Library Exception
 See https://swift.org/LICENSE.txt for license information
 #]]
 
-# Returns the architecture name in a variable
-#
-# Usage:
-#   get_swift_host_arch(result_var_name)
-#
-# Sets ${result_var_name} with the converted architecture name derived from
-# CMAKE_SYSTEM_PROCESSOR.
-function(get_swift_host_arch result_var_name)
-  if("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "x86_64")
-    set("${result_var_name}" "x86_64" PARENT_SCOPE)
-  elseif ("${CMAKE_SYSTEM_PROCESSOR}" MATCHES "AArch64|aarch64|arm64|ARM64")
-    if(CMAKE_SYSTEM_NAME MATCHES Darwin)
-      set("${result_var_name}" "arm64" PARENT_SCOPE)
-    else()
-      set("${result_var_name}" "aarch64" PARENT_SCOPE)
-    endif()
-  elseif("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "ppc64")
-    set("${result_var_name}" "powerpc64" PARENT_SCOPE)
-  elseif("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "ppc64le")
-    set("${result_var_name}" "powerpc64le" PARENT_SCOPE)
-  elseif("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "s390x")
-    set("${result_var_name}" "s390x" PARENT_SCOPE)
-  elseif("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "armv6l")
-    set("${result_var_name}" "armv6" PARENT_SCOPE)
-  elseif("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "armv7l")
-    set("${result_var_name}" "armv7" PARENT_SCOPE)
-  elseif("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "armv7-a")
-    set("${result_var_name}" "armv7" PARENT_SCOPE)
-  elseif("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "amd64")
-    set("${result_var_name}" "x86_64" PARENT_SCOPE)
-  elseif("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "AMD64")
-    set("${result_var_name}" "x86_64" PARENT_SCOPE)
-  elseif("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "IA64")
-    set("${result_var_name}" "itanium" PARENT_SCOPE)
-  elseif("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "x86")
-    set("${result_var_name}" "i686" PARENT_SCOPE)
-  elseif("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "i686")
-    set("${result_var_name}" "i686" PARENT_SCOPE)
-  elseif("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "wasm32")
-    set("${result_var_name}" "wasm32" PARENT_SCOPE)
-  elseif("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "wasm64")
-    set("${result_var_name}" "wasm64" PARENT_SCOPE)
-  elseif("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "riscv64")
-    set("${result_var_name}" "riscv64" PARENT_SCOPE)
-  else()
-    message(FATAL_ERROR "Unrecognized architecture on host system: ${CMAKE_SYSTEM_PROCESSOR}")
-  endif()
-endfunction()
-
 # Returns the os name in a variable
 #
 # Usage:
@@ -111,9 +62,10 @@ function(_install_target module)
   endif()
 
   install(FILES $<TARGET_PROPERTY:${module},Swift_MODULE_DIRECTORY>/${module_name}.swiftdoc
-    DESTINATION ${CMAKE_INSTALL_LIBDIR}/${swift}/${swift_os}/${module_name}.swiftmodule
-    RENAME ${Swift_MODULE_TRIPLE}.swiftdoc)
+    DESTINATION lib/${swift}/${swift_os}/${module_name}.swiftmodule
+    RENAME ${SwiftCollections_MODULE_TRIPLE}.swiftdoc)
+
   install(FILES $<TARGET_PROPERTY:${module},Swift_MODULE_DIRECTORY>/${module_name}.swiftmodule
-    DESTINATION ${CMAKE_INSTALL_LIBDIR}/${swift}/${swift_os}/${module_name}.swiftmodule
-    RENAME ${Swift_MODULE_TRIPLE}.swiftmodule)
+    DESTINATION lib/${swift}/${swift_os}/${module_name}.swiftmodule
+    RENAME ${SwiftCollections_MODULE_TRIPLE}.swiftmodule)
 endfunction()