================
@@ -195,6 +195,52 @@ declaration kind), all of which are optional:
SwiftReleaseOp: immortal
SwiftRetainOp: immortal
+:SwiftReturnOwnership:
+
+ Specifies the ownership convention of a function or method returning a C++
type
+ that has been imported as a Swift reference type using ``SwiftImportAs:
reference``.
+ This allows Swift to correctly manage the retain and release operations at
the
+ language boundary.
+
+ The possible values are:
+
+ - ``retained`` — Indicates that the function or method returns a +1
reference.
+ Swift will take ownership and is responsible for releasing it.
+ Equivalent to ``SWIFT_RETURNS_RETAINED``.
+ - ``unretained`` — Indicates that the function or method returns a +0
reference.
+ The caller must ensure the returned object remains alive.
+ Equivalent to ``SWIFT_RETURNS_UNRETAINED``.
+
+ This attribute can be applied to:
+
+ - **C++ functions**
+ - **C++ instance or static methods**
+ - **Objective-C / Objective-C++ methods or functions that return a C++
reference type**
----------------
egorzhdan wrote:
Minor: I'd say let's not highlight this in bold. Since we don't use bold
highlighting elsewhere in this document, this would attract too much attention.
https://github.com/llvm/llvm-project/pull/143545
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