# AtomicOptionalRepresentable Implementations ## Topics ### Type Aliases [`typealias AtomicOptionalRepresentation`](/documentation/Swift/ObjectIdentifier/AtomicOptionalRepresentation) The storage representation type that encodes to and decodes from `Optional` which is a suitable type when used in atomic operations on `Optional`. ### Type Methods [`static func decodeAtomicOptionalRepresentation(consuming ObjectIdentifier.AtomicOptionalRepresentation) -> ObjectIdentifier?`](/documentation/Swift/ObjectIdentifier/decodeAtomicOptionalRepresentation(_:)) Recovers the logical atomic type `Self?` by destroying some `AtomicOptionalRepresentation` storage instance returned from an atomic operation on `Optional`. [`static func encodeAtomicOptionalRepresentation(consuming ObjectIdentifier?) -> ObjectIdentifier.AtomicOptionalRepresentation`](/documentation/Swift/ObjectIdentifier/encodeAtomicOptionalRepresentation(_:)) Destroys a value of `Self` and prepares an `AtomicOptionalRepresentation` storage type to be used for atomic operations on `Optional`. --- 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)