---
title: BNNSLossFunction
framework: accelerate
role: symbol
role_heading: Structure
path: accelerate/bnnslossfunction
---

# BNNSLossFunction

Constants that describe loss functions.

## Declaration

```swift
struct BNNSLossFunction
```

## Topics

### Loss Functions

- [init(_:)](accelerate/bnnslossfunction/init(_:).md)
- [init(rawValue:)](accelerate/bnnslossfunction/init(rawvalue:).md)
- [rawValue](accelerate/bnnslossfunction/rawvalue.md)
- [BNNSLossFunctionCategoricalCrossEntropy](accelerate/bnnslossfunctioncategoricalcrossentropy.md)
- [BNNSLossFunctionCosineDistance](accelerate/bnnslossfunctioncosinedistance.md)
- [BNNSLossFunctionHinge](accelerate/bnnslossfunctionhinge.md)
- [BNNSLossFunctionHuber](accelerate/bnnslossfunctionhuber.md)
- [BNNSLossFunctionLog](accelerate/bnnslossfunctionlog.md)
- [BNNSLossFunctionMeanAbsoluteError](accelerate/bnnslossfunctionmeanabsoluteerror.md)
- [BNNSLossFunctionMeanSquareError](accelerate/bnnslossfunctionmeansquareerror.md)
- [BNNSLossFunctionSigmoidCrossEntropy](accelerate/bnnslossfunctionsigmoidcrossentropy.md)
- [BNNSLossFunctionSoftmaxCrossEntropy](accelerate/bnnslossfunctionsoftmaxcrossentropy.md)
- [BNNSLossFunctionYolo](accelerate/bnnslossfunctionyolo.md)

## Relationships

### Conforms To

- [BitwiseCopyable](swift/bitwisecopyable.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [RawRepresentable](swift/rawrepresentable.md)
- [Sendable](swift/sendable.md)

## See Also

### Loss layers

- [BNNS.LossLayer](accelerate/bnns/losslayer.md)
- [BNNSLossReductionFunction](accelerate/bnnslossreductionfunction.md)
- [BNNSLayerParametersLossBase](accelerate/bnnslayerparameterslossbase.md)
- [BNNSLayerParametersLossHuber](accelerate/bnnslayerparameterslosshuber.md)
- [BNNSLayerParametersLossSigmoidCrossEntropy](accelerate/bnnslayerparameterslosssigmoidcrossentropy.md)
- [BNNSLayerParametersLossSoftmaxCrossEntropy](accelerate/bnnslayerparameterslosssoftmaxcrossentropy.md)
- [BNNSLayerParametersLossYolo](accelerate/bnnslayerparameterslossyolo.md)
- [BNNSFilterCreateLayerLoss(_:_:)](accelerate/bnnsfiltercreatelayerloss(_:_:).md)
- [BNNSLossFilterApplyBatch(_:_:_:_:_:_:_:_:_:_:_:)](accelerate/bnnslossfilterapplybatch(_:_:_:_:_:_:_:_:_:_:_:).md)
- [BNNSLossFilterApplyBackwardBatch(_:_:_:_:_:_:_:_:_:_:_:_:)](accelerate/bnnslossfilterapplybackwardbatch(_:_:_:_:_:_:_:_:_:_:_:_:).md)