[Concurrency] SwiftStdlib 5.5 ⟹ SwiftStdlib 5.1 (usages)

The concurrency runtime now deploys back to macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, which corresponds to the 5.1 release of the stdlib.

Adjust macro usages accordingly.

Author: lorentey

lib/SILGen/SILGenFunction.cpp

@@ -927,7 +927,7 @@ void SILGenFunction::emitAsyncMainThreadStart(SILDeclRef entryPoint) {
   if (!getMainExecutorFuncDecl) {
     // If it doesn't exist due to an SDK-compiler mismatch, we can conjure one
     // up instead of crashing:
-    // @available(SwiftStdlib 5.5, *)
+    // @available(SwiftStdlib 5.1, *)
     // @_silgen_name("swift_task_getMainExecutor")
     // internal func _getMainExecutor() -> Builtin.Executor
 

stdlib/private/StdlibUnittest/StdlibUnittest.swift

@@ -880,7 +880,7 @@ func _childProcess() {
 }
 
 #if SWIFT_ENABLE_EXPERIMENTAL_CONCURRENCY
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 @inline(never)
 func _childProcessAsync() async {
   _installTrapInterceptor()
@@ -1375,7 +1375,7 @@ class _ParentProcess {
   }
 
 #if SWIFT_ENABLE_EXPERIMENTAL_CONCURRENCY
-  @available(SwiftStdlib 5.5, *)
+  @available(SwiftStdlib 5.1, *)
   internal func runOneTestAsync(
     fullTestName: String,
     testSuite: TestSuite,
@@ -1542,7 +1542,7 @@ class _ParentProcess {
   }
 
 #if SWIFT_ENABLE_EXPERIMENTAL_CONCURRENCY
-  @available(SwiftStdlib 5.5, *)
+  @available(SwiftStdlib 5.1, *)
   func runAsync() async {
     if let filter = _filter {
       print("StdlibUnittest: using filter: \(filter)")
@@ -1727,7 +1727,7 @@ public func runAllTests() {
 }
 
 #if SWIFT_ENABLE_EXPERIMENTAL_CONCURRENCY
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 public func runAllTestsAsync() async {
   if PersistentState.runNoTestsWasCalled {
     print("runAllTests() called after runNoTests(). Aborting.")
@@ -1915,7 +1915,7 @@ public final class TestSuite {
   }
 
 #if SWIFT_ENABLE_EXPERIMENTAL_CONCURRENCY
-  @available(SwiftStdlib 5.5, *)
+  @available(SwiftStdlib 5.1, *)
   func _runTestAsync(name testName: String, parameter: Int?) async {
     PersistentState.ranSomething = true
     for r in _allResettables {

stdlib/public/Concurrency/Actor.swift

@@ -17,7 +17,7 @@ import Swift
 ///
 /// The `Actor` protocol generalizes over all actor types. Actor types
 /// implicitly conform to this protocol.
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 public protocol Actor: AnyObject, Sendable {
 
   /// Retrieve the executor for this actor as an optimized, unowned
@@ -37,17 +37,17 @@ public protocol Actor: AnyObject, Sendable {
 
 /// Called to initialize the default actor instance in an actor.
 /// The implementation will call this within the actor's initializer.
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 @_silgen_name("swift_defaultActor_initialize")
 public func _defaultActorInitialize(_ actor: AnyObject)
 
 /// Called to destroy the default actor instance in an actor.
 /// The implementation will call this within the actor's deinit.
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 @_silgen_name("swift_defaultActor_destroy")
 public func _defaultActorDestroy(_ actor: AnyObject)
 
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 @_silgen_name("swift_task_enqueueMainExecutor")
 @usableFromInline
 internal func _enqueueOnMain(_ job: UnownedJob)

stdlib/public/Concurrency/AsyncCompactMapSequence.swift

@@ -12,7 +12,7 @@
 
 import Swift
 
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 extension AsyncSequence {
   /// Creates an asynchronous sequence that maps the given closure over the
   /// asynchronous sequence’s elements, omitting results that don't return a
@@ -55,7 +55,7 @@ extension AsyncSequence {
 
 /// An asynchronous sequence that maps a given closure over the asynchronous
 /// sequence’s elements, omitting results that don't return a value.
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 public struct AsyncCompactMapSequence<Base: AsyncSequence, ElementOfResult> {
   @usableFromInline
   let base: Base
@@ -73,7 +73,7 @@ public struct AsyncCompactMapSequence<Base: AsyncSequence, ElementOfResult> {
   }
 }
 
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 extension AsyncCompactMapSequence: AsyncSequence {
   /// The type of element produced by this asynchronous sequence.
   ///

stdlib/public/Concurrency/AsyncDropFirstSequence.swift

@@ -12,7 +12,7 @@
 
 import Swift
 
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 extension AsyncSequence {
   /// Omits a specified number of elements from the base asynchronous sequence,
   /// then passes through all remaining elements.
@@ -48,7 +48,7 @@ extension AsyncSequence {
 
 /// An asynchronous sequence which omits a specified number of elements from the
 /// base asynchronous sequence, then passes through all remaining elements.
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 public struct AsyncDropFirstSequence<Base: AsyncSequence> {
   @usableFromInline
   let base: Base
@@ -63,7 +63,7 @@ public struct AsyncDropFirstSequence<Base: AsyncSequence> {
   }
 }
 
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 extension AsyncDropFirstSequence: AsyncSequence {
   /// The type of element produced by this asynchronous sequence.
   ///
@@ -116,7 +116,7 @@ extension AsyncDropFirstSequence: AsyncSequence {
   }
 }
 
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 extension AsyncDropFirstSequence {
   /// Omits a specified number of elements from the base asynchronous sequence,
   /// then passes through all remaining elements.

stdlib/public/Concurrency/AsyncDropWhileSequence.swift

@@ -12,7 +12,7 @@
 
 import Swift
 
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 extension AsyncSequence {
   /// Omits elements from the base asynchronous sequence until a given closure
   /// returns false, after which it passes through all remaining elements.
@@ -52,7 +52,7 @@ extension AsyncSequence {
 /// An asynchronous sequence which omits elements from the base sequence until a
 /// given closure returns false, after which it passes through all remaining
 /// elements.
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 public struct AsyncDropWhileSequence<Base: AsyncSequence> {
   @usableFromInline
   let base: Base
@@ -70,7 +70,7 @@ public struct AsyncDropWhileSequence<Base: AsyncSequence> {
   }
 }
 
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 extension AsyncDropWhileSequence: AsyncSequence {
 
   /// The type of element produced by this asynchronous sequence.

stdlib/public/Concurrency/AsyncFilterSequence.swift

@@ -12,7 +12,7 @@
 
 import Swift
 
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 extension AsyncSequence {
   /// Creates an asynchronous sequence that contains, in order, the elements of
   /// the base sequence that satisfy the given predicate.
@@ -43,7 +43,7 @@ extension AsyncSequence {
 
 /// An asynchronous sequence that contains, in order, the elements of
 /// the base sequence that satisfy a given predicate.
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 public struct AsyncFilterSequence<Base: AsyncSequence> {
   @usableFromInline
   let base: Base
@@ -61,7 +61,7 @@ public struct AsyncFilterSequence<Base: AsyncSequence> {
   }
 }
 
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 extension AsyncFilterSequence: AsyncSequence {
   /// The type of element produced by this asynchronous sequence.
   ///

stdlib/public/Concurrency/AsyncFlatMapSequence.swift

@@ -12,7 +12,7 @@
 
 import Swift
 
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 extension AsyncSequence {
   /// Creates an asynchronous sequence that concatenates the results of calling
   /// the given transformation with each element of this sequence.
@@ -49,7 +49,7 @@ extension AsyncSequence {
 
 /// An asynchronous sequence that concatenates the results of calling a given
 /// transformation with each element of this sequence.
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 public struct AsyncFlatMapSequence<Base: AsyncSequence, SegmentOfResult: AsyncSequence> {
   @usableFromInline
   let base: Base
@@ -67,7 +67,7 @@ public struct AsyncFlatMapSequence<Base: AsyncSequence, SegmentOfResult: AsyncSe
   }
 }
 
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 extension AsyncFlatMapSequence: AsyncSequence {
   /// The type of element produced by this asynchronous sequence.
   ///

stdlib/public/Concurrency/AsyncIteratorProtocol.swift

@@ -84,7 +84,7 @@ import Swift
 /// If the iterator needs to clean up on cancellation, it can do so after
 /// checking for cancellation as described above, or in `deinit` if it's
 /// a reference type.
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 @rethrows
 public protocol AsyncIteratorProtocol {
   associatedtype Element

stdlib/public/Concurrency/AsyncLet.swift

@@ -16,7 +16,7 @@ import Swift
 // ==== Async Let -------------------------------------------------------------
 // Only has internal / builtin functions as it is not really accessible directly
 
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 @_silgen_name("swift_asyncLet_start")
 public func _asyncLetStart<T>(
   asyncLet: Builtin.RawPointer,
@@ -25,34 +25,34 @@ public func _asyncLetStart<T>(
 )
 
 /// DEPRECATED. use _asyncLet_get instead
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 @_silgen_name("swift_asyncLet_wait")
 public func _asyncLetGet<T>(asyncLet: Builtin.RawPointer) async -> T
 
 /// DEPRECATED. use _asyncLet_get_throwing instead
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 @_silgen_name("swift_asyncLet_wait_throwing")
 public func _asyncLetGetThrowing<T>(asyncLet: Builtin.RawPointer) async throws -> T
 
 /// DEPRECATED. use _asyncLet_finish instead
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 @_silgen_name("swift_asyncLet_end")
 public func _asyncLetEnd(
   asyncLet: Builtin.RawPointer // TODO: should this take __owned?
 )
 
 /// Wait if necessary and then project the result value of an async let
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 @_silgen_name("swift_asyncLet_get")
 public func _asyncLet_get(_ asyncLet: Builtin.RawPointer, _ resultBuffer: Builtin.RawPointer) async -> Builtin.RawPointer
 
 /// Wait if necessary and then project the result value of an async let that throws
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 @_silgen_name("swift_asyncLet_get_throwing")
 public func _asyncLet_get_throwing(_ asyncLet: Builtin.RawPointer, _ resultBuffer: Builtin.RawPointer) async throws -> Builtin.RawPointer
 
 /// Wait if necessary and then tear down the async let task
-@available(SwiftStdlib 5.5, *)
+@available(SwiftStdlib 5.1, *)
 @_silgen_name("swift_asyncLet_finish")
 public func _asyncLet_finish(_ asyncLet: Builtin.RawPointer, _ resultBuffer: Builtin.RawPointer) async