# AccelerateBuffer A type that represents an immutable buffer. ``` protocol AccelerateBuffer ``` ## Overview If you implement your own type that conforms to [`AccelerateBuffer`](/documentation/Accelerate/AccelerateBuffer) and uses the default implementation of [`withUnsafeBufferPointer(_:)`](/documentation/Accelerate/AccelerateBuffer/withUnsafeBufferPointer(_:)), your type needs to return a nonnil result from . ## Topics ### Associated Types [`associatedtype Element`](/documentation/Accelerate/AccelerateBuffer/Element) The buffer’s element type. ### Instance Properties [`var count: Int`](/documentation/Accelerate/AccelerateBuffer/count) The number of elements in the buffer. ### Instance Methods [`func withUnsafeBufferPointer((UnsafeBufferPointer) throws -> R) rethrows -> R`](/documentation/Accelerate/AccelerateBuffer/withUnsafeBufferPointer(_:)) Calls a closure with a pointer to the object’s contiguous storage. ## Relationships ### Inherited By [`AccelerateMutableBuffer`](/documentation/Accelerate/AccelerateMutableBuffer) ### Conforming Types [`PixelBuffer`](/documentation/Accelerate/vImage/PixelBuffer) --- 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)