# makeContext(options:_:) Returns a new context that wraps a graph object that the given closure defines. ``` static func makeContext(options: BNNSGraph.CompileOptions = CompileOptions(), _ block: (inout BNNSGraph.Builder) -> [any BNNSGraph.TensorDescriptor]) throws -> BNNSGraph.Context ``` ## Parameters `options` The compilation options. `block` A closure with a `BNNSGraph.Builder` parameter that points to the BNNS Graph builder. ## Discussion Use this function to specify the operations that define a BNNS graph. For example, the following code creates a graph that performs element-wise multiplication of two eight-element vectors: ``` let context = try BNNSGraph.makeContext ({ builder in let x = builder.argument(name: "x", dataType: Float.self, shape: [8]) let y = builder.argument(name: "y", dataType: Float.self, shape: [8]) let z = x * y return [z] }) ``` The following code defines the arguments and executes the graph: ``` var args = context.argumentNames().map { name in return context.tensor(argument: name, fillKnownDynamicShapes: false)! } defer { args.forEach { $0.deallocate() } } args[context.argumentPosition(argument: "x")] .allocate(initializingFrom: [1, 2, 3, 4, 5, 6, 7, 8] as [Float]) args[context.argumentPosition(argument: "y")] .allocate(initializingFrom: [8, 7, 6, 5, 4, 3, 2, 1] as [Float]) // Output argument args[0].allocate(as: Float.self, count: 8) try context.executeFunction(arguments: &args) ``` On return, `args[0]` contains the values `[8.0, 14.0, 18.0, 20.0, 20.0, 18.0, 14.0, 8.0]`. --- 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)