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# appendInterpolation(_:bytes:format:privacy:attributes:)

Appends interpolated pointer data with the specified attributes.

```
mutating func appendInterpolation(_ pointer: @autoclosure @escaping () -> UnsafeRawPointer, bytes: @autoclosure @escaping () -> Int, format: OSLogPointerFormat = .none, privacy: OSLogPrivacy = .auto, attributes: String)
```

## Parameters

`pointer`

The interpolated pointer data. The system automatically wraps this value in a closure.

`bytes`

The size of the pointer in bytes.

`format`

The format to apply to the value when the system renders it in a log message. For more information, see [`OSLogPointerFormat`](/documentation/os/OSLogPointerFormat). The default value is [`OSLogPointerFormat.none`](/documentation/os/OSLogPointerFormat/none).

`privacy`

The privacy level of the value, which the system applies when it renders the value in a log message. For more information, see [`OSLogPrivacy`](/documentation/os/OSLogPrivacy). The default value is [`auto`](/documentation/os/OSLogPrivacy/auto).

`attributes`

Additional information about the value. Tools that process log messages interpret these attributes, which you typically provide as key-value pairs. For example, Instruments processes any  e_ngineering types_ you embed in this value. For more information, see [Instruments Developer Help](https://help.apple.com/instruments/developer/mac/current/#/devcd5016d31).

## Discussion

> Important:
> You don’t call this method directly. Instead, the framework calls it automatically when you append interpolated pointer data to a log message.

---

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