<!--
{
  "availability" : [
    "*: -",
    "iOS: 14.0.0 -",
    "iPadOS: 14.0.0 -",
    "macCatalyst: -",
    "macOS: 11.0.0 -",
    "tvOS: 14.0.0 -",
    "visionOS: -",
    "watchOS: 7.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "Accelerate",
  "identifier" : "/documentation/Accelerate/BNNS/Layer",
  "metadataVersion" : "0.1.0",
  "role" : "Class",
  "symbol" : {
    "kind" : "Class",
    "modules" : [
      "Accelerate"
    ],
    "preciseIdentifier" : "s:10Accelerate4BNNSO5LayerC"
  },
  "title" : "BNNS.Layer"
}
-->

# BNNS.Layer

The base class for layer objects that wrap filters and manage deinitialization.

```
class Layer
```

## Topics

### Instance Properties

[`let bnnsFilter: BNNSFilter`](/documentation/Accelerate/BNNS/Layer/bnnsFilter)

The underlying filter.

## Relationships

### Inherited By

[`BroadcastMatrixMultiplyLayer`](/documentation/Accelerate/BNNS/BroadcastMatrixMultiplyLayer)

[`EmbeddingLayer`](/documentation/Accelerate/BNNS/EmbeddingLayer)

[`PoolingLayer`](/documentation/Accelerate/BNNS/PoolingLayer)

[`BinaryArithmeticLayer`](/documentation/Accelerate/BNNS/BinaryArithmeticLayer)

[`FusedLayer`](/documentation/Accelerate/BNNS/FusedLayer)

[`UnaryLayer`](/documentation/Accelerate/BNNS/UnaryLayer)

[`BinaryLayer`](/documentation/Accelerate/BNNS/BinaryLayer)

[`UnaryArithmeticLayer`](/documentation/Accelerate/BNNS/UnaryArithmeticLayer)

[`TernaryArithmeticLayer`](/documentation/Accelerate/BNNS/TernaryArithmeticLayer)

[`NormalizationLayer`](/documentation/Accelerate/BNNS/NormalizationLayer)

[`LossLayer`](/documentation/Accelerate/BNNS/LossLayer)

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)