# class_copyProtocolList(_:_:) Describes the protocols adopted by a class. ``` func class_copyProtocolList(_ cls: AnyClass?, _ outCount: UnsafeMutablePointer?) -> AutoreleasingUnsafeMutablePointer? ``` ## Parameters `cls` The class you want to inspect. `outCount` On return, contains the length of the returned array. If `outCount` is `NULL`, the length is not returned. ## Return Value An array of pointers of type `Protocol*` describing the protocols adopted by the class. Any protocols adopted by superclasses or other protocols are not included. The array contains `*outCount` pointers followed by a `NULL` terminator. You must free the array with `free()`. If `cls` adopts no protocols, or `cls` is `Nil` , returns `NULL` and `*outCount` is `0` . ## Discussion --- 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)