# withUnsafeBufferPointer(ofType:_:) Calls a given closure with a raw pointer to the multiarray’s storage. ``` func withUnsafeBufferPointer(ofType type: S.Type, _ body: (UnsafeBufferPointer) throws -> R) rethrows -> R where S : MLShapedArrayScalar ``` ## Parameters `type` The element type of the buffer passed in the body. This must be a Swift primitive type equivalent to `dataType`. This closure takes the following parameter: - `ptr`: The pointer to the buffer. `body` A closure with an parameter that points to the storage for the multiarray. ## Discussion The buffer contains a collection of `int32`, `float16`, `float32`, or `float64` values, depending on the multiarray’s data type. It may not store these scalar values contiguously; use [`strides`](/documentation/CoreML/MLMultiArray/strides) to get the buffer layout. --- 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)