# withUTF8Buffer(_:) Invokes the given closure with a buffer containing the static string’s UTF-8 code unit sequence (excluding the null terminator). ``` func withUTF8Buffer(_ body: (UnsafeBufferPointer) -> R) -> R ``` ## Parameters `body` A closure that takes a buffer pointer to the static string’s UTF-8 code unit sequence as its sole argument. If the closure has a return value, that value is also used as the return value of the `withUTF8Buffer(_:)` method. The pointer argument is valid only for the duration of the method’s execution. ## Return Value The return value, if any, of the `body` closure. ## Discussion This method works regardless of whether the static string stores a pointer or a single Unicode scalar value. The pointer argument to `body` is valid only during the execution of `withUTF8Buffer(_:)`. Do not store or return the pointer for later use. --- 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)