# getFirstUnlaidCharacterIndex(_:glyphIndex:) Returns the indexes for the first character and glyph that have invalid layout information. ``` func getFirstUnlaidCharacterIndex(_ charIndex: UnsafeMutablePointer?, glyphIndex: UnsafeMutablePointer?) ``` ## Parameters `charIndex` On return, if not `NULL`, the index of the first character that has invalid layout information `glyphIndex` On return, if not `NULL`, the index of the first glyph that has invalid layout information. ## Discussion Either parameter may be `NULL`, in which case the receiver simply ignores it. As part of its implementation, this method calls [`firstUnlaidCharacterIndex()`](/documentation/AppKit/NSLayoutManager/firstUnlaidCharacterIndex()) and [`firstUnlaidGlyphIndex()`](/documentation/AppKit/NSLayoutManager/firstUnlaidGlyphIndex()). To change this method’s behavior, override those two methods instead of this one. --- 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)