---
title: version
framework: corefoundation
role: symbol
role_heading: Instance Property
path: corefoundation/cfbinaryheapcallbacks/version
---

# version

The version number of the structure type being passed in as a parameter to the CFBinaryHeap creation functions. This structure is version 0.

## Declaration

```swift
var version: CFIndex
```

## See Also

### Callbacks

- [CFBinaryHeapApplierFunction](corefoundation/cfbinaryheapapplierfunction.md)
- [compare](corefoundation/cfbinaryheapcallbacks/compare.md)
- [copyDescription](corefoundation/cfbinaryheapcallbacks/copydescription.md)
- [release](corefoundation/cfbinaryheapcallbacks/release.md)
- [retain](corefoundation/cfbinaryheapcallbacks/retain.md)