Merge pull request swiftlang#72956 from tshortli/async-iterator-next-isolation-condfail

tshortli · web-flow · commit b6754aa10ddb · 2024-04-10T14:01:15.000-07:00
Concurrency: Fix a condfail in default `AsyncIteratorProtocol.next()`
diff --git a/stdlib/public/Concurrency/AsyncIteratorProtocol.swift b/stdlib/public/Concurrency/AsyncIteratorProtocol.swift
@@ -133,6 +133,10 @@ extension AsyncIteratorProtocol {
   @available(SwiftStdlib 6.0, *)
   @inlinable
   public mutating func next() async throws(Failure) -> Element? {
+#if $OptionalIsolatedParameters
     return try await next(isolation: nil)
+#else
+    fatalError("unsupported compiler")
+#endif
   }
 }

Original file line number	Diff line number	Diff line change
`@@ -133,6 +133,10 @@ extension AsyncIteratorProtocol {`
`133`	`133`	`@available(SwiftStdlib 6.0, *)`
`134`	`134`	`@inlinable`
`135`	`135`	`public mutating func next() async throws(Failure) -> Element? {`
	`136`	`+#if $OptionalIsolatedParameters`
`136`	`137`	`return try await next(isolation: nil)`
	`138`	`+#else`
	`139`	`+ fatalError("unsupported compiler")`
	`140`	`+#endif`
`137`	`141`	`}`
`138`	`142`	`}`