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# AudioFileStreamPropertyFlags

```
struct AudioFileStreamPropertyFlags
```

## Topics

### Constants

[`cacheProperty`](/documentation/AudioToolbox/AudioFileStreamPropertyFlags/cacheProperty)

A property listener sets this flag to instruct the parser to cache the property value so that it remains available after the callback returns.

[`propertyIsCached`](/documentation/AudioToolbox/AudioFileStreamPropertyFlags/propertyIsCached)

This flag is set when the callback [`AudioFileStream_PropertyListenerProc`](/documentation/AudioToolbox/AudioFileStream_PropertyListenerProc) is invoked in the case that the value of the property has been cached and can be obtained later.


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