# closeAfter(_:) Runs a closure and then closes the file descriptor, even if an error occurs. ``` func closeAfter(_ body: () throws -> R) throws -> R ``` ## Parameters `body` The closure to run. If the closure throws an error, this method closes the file descriptor before it rethrows that error. ## Return Value The value returned by the closure. ## Discussion If `body` throws an error or an error occurs while closing the file descriptor, this method rethrows that error. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)