---
title: hashFunction
framework: foundation
role: symbol
role_heading: Instance Property
path: foundation/nspointerfunctions/hashfunction
---

# hashFunction

The hash function.

## Declaration

```swift
var hashFunction: ((UnsafeRawPointer, ((UnsafeRawPointer) -> Int)?) -> Int)? { get set }
```

## See Also

### Personality Functions

- [isEqualFunction](foundation/nspointerfunctions/isequalfunction.md)
- [sizeFunction](foundation/nspointerfunctions/sizefunction.md)
- [descriptionFunction](foundation/nspointerfunctions/descriptionfunction.md)