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# CFStreamEventType

Defines constants for stream-related events.

```
struct CFStreamEventType
```

## Overview

This enumeration defines constants for stream-related events.

## Topics

### Constants

[`kCFStreamEventNone`](/documentation/CoreFoundation/CFStreamEventType/kCFStreamEventNone)

No event has occurred.

[`openCompleted`](/documentation/CoreFoundation/CFStreamEventType/openCompleted)

The open has completed successfully.

[`hasBytesAvailable`](/documentation/CoreFoundation/CFStreamEventType/hasBytesAvailable)

The stream has bytes to be read.

[`canAcceptBytes`](/documentation/CoreFoundation/CFStreamEventType/canAcceptBytes)

The stream can accept bytes for writing.

[`errorOccurred`](/documentation/CoreFoundation/CFStreamEventType/errorOccurred)

An error has occurred on the stream.

[`endEncountered`](/documentation/CoreFoundation/CFStreamEventType/endEncountered)

The end of the stream has been reached.


---

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