TSCBasic: mark ThreadSafeOutputByteStream as Sendable (#387)

MaxDesiatov · web-flow · commit cba2779e1850 · 2023-01-31T14:34:46.000-08:00
Since we still have to support Swift 5.5, this is marked as either `UnsafeSendable` or `@unchecked Sendable`, depending on the version of the Swift compiler.
diff --git a/Sources/TSCBasic/WritableByteStream.swift b/Sources/TSCBasic/WritableByteStream.swift
@@ -348,6 +348,13 @@ public final class ThreadSafeOutputByteStream: WritableByteStream {
     }
 }
 
+
+#if swift(<5.7)
+extension ThreadSafeOutputByteStream: UnsafeSendable {}
+#else
+extension ThreadSafeOutputByteStream: @unchecked Sendable {}
+#endif
+
 /// Define an output stream operator. We need it to be left associative, so we
 /// use `<<<`.
 infix operator <<< : StreamingPrecedence

Original file line number	Diff line number	Diff line change
`@@ -348,6 +348,13 @@ public final class ThreadSafeOutputByteStream: WritableByteStream {`
`348`	`348`	`}`
`349`	`349`	`}`
`350`	`350`
	`351`	`+`
	`352`	`+#if swift(<5.7)`
	`353`	`+extension ThreadSafeOutputByteStream: UnsafeSendable {}`
	`354`	`+#else`
	`355`	`+extension ThreadSafeOutputByteStream: @unchecked Sendable {}`
	`356`	`+#endif`
	`357`	`+`
`351`	`358`	`/// Define an output stream operator. We need it to be left associative, so we`
`352`	`359`	/// use `<<<`.
`353`	`360`	`infix operator <<< : StreamingPrecedence`