# BNNSGraph.Builder A structure thats provides a closure you can use to define the arguments and operations of a BNNS Graph. ``` struct Builder ``` ## Topics ### Protocols [`protocol OperationParameter`](/documentation/Accelerate/BNNSGraph/Builder/OperationParameter) A protocol that allows functions to accept either tensors or collections. [`protocol SliceIndex`](/documentation/Accelerate/BNNSGraph/Builder/SliceIndex) A protocol that the BNNS graph builder uses to specify slice indices. ### Structures [`struct SliceRange`](/documentation/Accelerate/BNNSGraph/Builder/SliceRange) A structure that represents a range. [`struct Tensor`](/documentation/Accelerate/BNNSGraph/Builder/Tensor) A structure that represents an abstract handle to a tensor that you use within a `BNNSGraph.makeContext` closure. ### Instance Methods [`func argument(name: String?, dataType: T.Type, shape: [Int], intent: BNNSGraph.Builder.Intent) -> BNNSGraph.Builder.Tensor`](/documentation/Accelerate/BNNSGraph/Builder/argument(name:dataType:shape:intent:)) Registers and returns an input or in-out tensor argument to the graph. [`func concatenate([BNNSGraph.Builder.Tensor], axis: Int) -> BNNSGraph.Builder.Tensor`](/documentation/Accelerate/BNNSGraph/Builder/concatenate(_:axis:)) Adds a concatenation operation to the current graph. [`func constant(name: String?, value: T) -> BNNSGraph.Builder.Tensor`](/documentation/Accelerate/BNNSGraph/Builder/constant(name:value:)) Registers and returns a tensor that contains a constant scalar value. [`func constant(name: String?, values: some AccelerateBuffer, shape: [Int]?) -> BNNSGraph.Builder.Tensor`](/documentation/Accelerate/BNNSGraph/Builder/constant(name:values:shape:)) Registers and returns a tensor with the specified shape that contains constant data, such as weight or bias values. [`func constant(values: Array>, rowMajor: Bool) -> BNNSGraph.Builder.Tensor`](/documentation/Accelerate/BNNSGraph/Builder/constant(values:rowMajor:)-6b7b8) Returns a rank 2 tensor from an array of arrays. [`func constant(values: Array>, rowMajor: Bool) -> BNNSGraph.Builder.Tensor`](/documentation/Accelerate/BNNSGraph/Builder/constant(values:rowMajor:)-7b4v2) ### Type Aliases [`typealias PoolingPadding`](/documentation/Accelerate/BNNSGraph/Builder/PoolingPadding) The padding that you use for pooling operations to specify zero-padding. ### Enumerations [`enum Activation`](/documentation/Accelerate/BNNSGraph/Builder/Activation) The activation function that a recurrent operation uses. [`enum CeilingMode`](/documentation/Accelerate/BNNSGraph/Builder/CeilingMode) The pooling ceiling mode. [`enum ConvolutionPadding`](/documentation/Accelerate/BNNSGraph/Builder/ConvolutionPadding) The padding that you use for convolution operations to specify zero-padding. [`enum Direction`](/documentation/Accelerate/BNNSGraph/Builder/Direction) The direction of a recurrent operation. [`enum Intent`](/documentation/Accelerate/BNNSGraph/Builder/Intent) Constants that describe argument intents. [`enum Padding`](/documentation/Accelerate/BNNSGraph/Builder/Padding) The padding that you use for pad operations. [`enum PoolingFunction`](/documentation/Accelerate/BNNSGraph/Builder/PoolingFunction) The pooling function [`enum ScatterMode`](/documentation/Accelerate/BNNSGraph/Builder/ScatterMode) Constants that specify how scatter operations overwrite destination elements. [`enum SortOrder`](/documentation/Accelerate/BNNSGraph/Builder/SortOrder) The sort order for functions such as `argsort`. --- Copyright © 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)