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# FSCompleteIOFlags

Flags that describe the behavior of an I/O completion operation.

```
struct FSCompleteIOFlags
```

## Overview

This type is an option set in Swift.
In Objective-C, the cases of this enumeration combine to create a bit field.

## Topics

### Declaring I/O completion behaviors

[`read`](/documentation/FSKit/FSCompleteIOFlags/read)

A flag that describes a read operation.

[`write`](/documentation/FSKit/FSCompleteIOFlags/write)

A flag that describes a write operation.

[`async`](/documentation/FSKit/FSCompleteIOFlags/async)

A flag that requests that the file system module flush metadata I/O asynchronously.

### Working with raw values

[`init(rawValue:)`](/documentation/FSKit/FSCompleteIOFlags/init(rawValue:))


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