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# BNNSReduceFunctionNone

A reduction function that copies the input to the output.

```
var BNNSReduceFunctionNone: BNNSReduceFunction { get }
```

## Discussion

BNNS provides this reduction function for use with some functions — such as [`BNNSScatter(_:_:_:_:_:_:)`](/documentation/Accelerate/BNNSScatter(_:_:_:_:_:_:)) — to indicate that the operation copies the input to the output. [`BNNSReduceFunctionNone`](/documentation/Accelerate/BNNSReduceFunctionNone) isn’t supported by the BNNS reduction layer, use [`BNNSCopy(_:_:_:)`](/documentation/Accelerate/BNNSCopy(_:_:_:)) to perform a copy or conversion operation.

---

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