# BNNSGraphGetArgumentPosition(_:_:_:) Returns the index into the arguments array for the given function argument. ``` func BNNSGraphGetArgumentPosition(_ graph: bnns_graph_t, _ function: UnsafePointer?, _ argument: UnsafePointer) -> Int ``` ## Parameters `graph` The compiled graph object. `function` The function. Specify as `nil` if the graph only contains one function. `argument` The name of the input or output argument. ## Return Value Returns the index into the arguments array for the given function argument, or `SIZE_T_MAX` if the query fails. ## Discussion --- 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)