---
title: MPSRNNDescriptor
framework: metalperformanceshaders
role: symbol
role_heading: Class
path: metalperformanceshaders/mpsrnndescriptor
---

# MPSRNNDescriptor

A description of a recursive neural network block or layer.

## Declaration

```swift
class MPSRNNDescriptor
```

## Topics

### Instance Properties

- [inputFeatureChannels](metalperformanceshaders/mpsrnndescriptor/inputfeaturechannels.md)
- [layerSequenceDirection](metalperformanceshaders/mpsrnndescriptor/layersequencedirection.md)
- [outputFeatureChannels](metalperformanceshaders/mpsrnndescriptor/outputfeaturechannels.md)
- [useFloat32Weights](metalperformanceshaders/mpsrnndescriptor/usefloat32weights.md)
- [useLayerInputUnitTransformMode](metalperformanceshaders/mpsrnndescriptor/uselayerinputunittransformmode.md)

## Relationships

### Inherits From

- [NSObject](objectivec/nsobject-swift.class.md)

### Inherited By

- [MPSGRUDescriptor](metalperformanceshaders/mpsgrudescriptor.md)
- [MPSLSTMDescriptor](metalperformanceshaders/mpslstmdescriptor.md)
- [MPSRNNSingleGateDescriptor](metalperformanceshaders/mpsrnnsinglegatedescriptor.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)

## See Also

### Initializers

- [init(coder:device:)](metalperformanceshaders/mpsrnnimageinferencelayer/init(coder:device:).md)
- [init(device:rnnDescriptor:)](metalperformanceshaders/mpsrnnimageinferencelayer/init(device:rnndescriptor:).md)
- [init(device:rnnDescriptors:)](metalperformanceshaders/mpsrnnimageinferencelayer/init(device:rnndescriptors:).md)