# AtomicOptionalRepresentable An atomic value that also supports atomic operations when wrapped in an `Optional`. Atomic optional representable types come with a standalone atomic representation for their optional-wrapped variants. ``` protocol AtomicOptionalRepresentable : AtomicRepresentable ``` ## Topics ### Associated Types [`associatedtype AtomicOptionalRepresentation : BitwiseCopyable`](/documentation/Synchronization/AtomicOptionalRepresentable/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 Self.AtomicOptionalRepresentation) -> Self?`](/documentation/Synchronization/AtomicOptionalRepresentable/decodeAtomicOptionalRepresentation(_:)) Recovers the logical atomic type `Self?` by destroying some `AtomicOptionalRepresentation` storage instance returned from an atomic operation on `Optional`. [`static func encodeAtomicOptionalRepresentation(consuming Self?) -> Self.AtomicOptionalRepresentation`](/documentation/Synchronization/AtomicOptionalRepresentable/encodeAtomicOptionalRepresentation(_:)) Destroys a value of `Self` and prepares an `AtomicOptionalRepresentation` storage type to be used for atomic operations on `Optional`. ## Relationships ### Conforming Types [`UnsafePointer`](/documentation/Swift/UnsafePointer) [`UnsafeMutableRawPointer`](/documentation/Swift/UnsafeMutableRawPointer) [`ObjectIdentifier`](/documentation/Swift/ObjectIdentifier) [`OpaquePointer`](/documentation/Swift/OpaquePointer) [`UnsafeRawPointer`](/documentation/Swift/UnsafeRawPointer) [`UnsafeMutablePointer`](/documentation/Swift/UnsafeMutablePointer) [`Unmanaged`](/documentation/Swift/Unmanaged) ### Inherits From [`AtomicRepresentable`](/documentation/Synchronization/AtomicRepresentable) --- 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)