# anyOf(_:) Returns a character class that matches any character in the given string or sequence. ``` static func anyOf(_ s: S) -> CharacterClass where S : Sequence, S.Element == Character ``` ## Discussion Calling this method with a group of characters is equivalent to listing those characters in a custom character class in regex syntax. For example, the two regexes in this example are equivalent: ``` let regex1 = /[abcd]+/ let regex2 = OneOrMore(.anyOf("abcd")) ``` --- 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)