---
title: kUnicodeDirectionalityMask
framework: Core Services
role: symbol
role_heading: Enumeration Case
platforms: [Mac Catalyst 17.0+, macOS 10.0+]
path: coreservices/1433493-conversion_masks/kunicodedirectionalitymask
---

# kUnicodeDirectionalityMask

A mask for setting the directionality control flag

## Declaration

```occ
kUnicodeDirectionalityMask = 3L << kUnicodeDirectionalityBits
```