---
title: BNNS.DescriptorType
framework: accelerate
role: symbol
role_heading: Enumeration
path: accelerate/bnns/descriptortype
---

# BNNS.DescriptorType

Constants that describe the input and output types of an arithmetic operation.

## Declaration

```swift
enum DescriptorType
```

## Topics

### Descriptor Types

- [BNNS.DescriptorType.constant](accelerate/bnns/descriptortype/constant.md)
- [BNNS.DescriptorType.parameter](accelerate/bnns/descriptortype/parameter.md)
- [BNNS.DescriptorType.sample](accelerate/bnns/descriptortype/sample.md)

## Relationships

### Conforms To

- [Equatable](swift/equatable.md)
- [Escapable](swift/escapable.md)
- [Hashable](swift/hashable.md)