---
title: copyDescription
framework: corefoundation
role: symbol
role_heading: Instance Property
path: corefoundation/cffiledescriptorcontext/copydescription
---

# copyDescription

The callback used to create a descriptive string representation of the CFFileDescriptor.

## Declaration

```swift
var copyDescription: ((UnsafeMutableRawPointer?) -> Unmanaged<CFString>?)!
```