---
title: SecTransformMetaAttributeType.canCycle
framework: security
role: symbol
role_heading: Case
path: security/sectransformmetaattributetype/cancycle
---

# SecTransformMetaAttributeType.canCycle

The transform allows cyclic behavior.

## Declaration

```swift
case canCycle
```

## Discussion

Discussion A transform group is a directed graph which is typically acyclic. Some transforms need to work with cycles. For example, a transform that emits a header and trailer around the data of another transform must create a cycle. If this metadata set to true, no error is returned if a cycle is detected for this attribute.