# Anchor A regex component that matches a specific condition at a particular position in an input string. ``` struct Anchor ``` ## Overview You can use anchors to guarantee that a match only occurs at certain points in an input string, such as at the beginning of the string or at the end of a line. ## Topics ### Instance Properties [`var inverted: Anchor`](/documentation/RegexBuilder/Anchor/inverted) The inverse of this anchor, which matches at every position that this anchor does not. ### Type Properties [`static var endOfLine: Anchor`](/documentation/RegexBuilder/Anchor/endOfLine) An anchor that matches at the end of a line, including at the end of the input string. [`static var endOfSubject: Anchor`](/documentation/RegexBuilder/Anchor/endOfSubject) An anchor that matches at the end of the input string. [`static var endOfSubjectBeforeNewline: Anchor`](/documentation/RegexBuilder/Anchor/endOfSubjectBeforeNewline) An anchor that matches at the end of the input string or at the end of the line immediately before the end of the string. [`static var firstMatchingPositionInSubject: Anchor`](/documentation/RegexBuilder/Anchor/firstMatchingPositionInSubject) An anchor that matches at the first position of a match in the input string. [`static var startOfLine: Anchor`](/documentation/RegexBuilder/Anchor/startOfLine) An anchor that matches at the start of a line, including the start of the input string. [`static var startOfSubject: Anchor`](/documentation/RegexBuilder/Anchor/startOfSubject) An anchor that matches at the start of the input string. [`static var textSegmentBoundary: Anchor`](/documentation/RegexBuilder/Anchor/textSegmentBoundary) An anchor that matches at a grapheme cluster boundary. [`static var wordBoundary: Anchor`](/documentation/RegexBuilder/Anchor/wordBoundary) An anchor that matches at a word boundary. ## Relationships ### Conforms To [`RegexComponent`](/documentation/Swift/RegexComponent) [`Copyable`](/documentation/Swift/Copyable) [`Escapable`](/documentation/Swift/Escapable) --- 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)