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# OSLogMessageComponent.ArgumentCategory

The data type corresponding to the argument provided in a message payload.

```
enum ArgumentCategory
```

## Overview

For example, `OSLogMessageComponent` can represent the number associated with a `%d` placeholder. This value can be undefined if the argument data cann’t be decoded, for example if it were redacted.

## Topics

### Constants

[`OSLogMessageComponent.ArgumentCategory.data`](/documentation/OSLog/OSLogMessageComponent/ArgumentCategory-swift.enum/data)

The argument is an <doc://com.apple.documentation/documentation/Foundation/NSData> object.

[`OSLogMessageComponent.ArgumentCategory.double`](/documentation/OSLog/OSLogMessageComponent/ArgumentCategory-swift.enum/double)

The argument is a double.

[`OSLogMessageComponent.ArgumentCategory.int64`](/documentation/OSLog/OSLogMessageComponent/ArgumentCategory-swift.enum/int64)

The argument is a 64-bit signed integer.

[`OSLogMessageComponent.ArgumentCategory.string`](/documentation/OSLog/OSLogMessageComponent/ArgumentCategory-swift.enum/string)

The argument is a string.

[`OSLogMessageComponent.ArgumentCategory.uInt64`](/documentation/OSLog/OSLogMessageComponent/ArgumentCategory-swift.enum/uInt64)

The argument is a 64-bit unsigned integer.

[`OSLogMessageComponent.ArgumentCategory.undefined`](/documentation/OSLog/OSLogMessageComponent/ArgumentCategory-swift.enum/undefined)

The argument’s type is not defined.


---

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