# all(_:) True if every lane of mask is true. ``` func all(_ mask: SIMDMask) -> Bool where Storage : SIMD, Storage.Scalar : FixedWidthInteger, Storage.Scalar : SignedInteger ``` --- 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)