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# MTLArgumentAccess

Function access restrictions to argument data in the shading language code.

```
typealias MTLArgumentAccess = MTLBindingAccess
```

## Topics

### Specifying access options

[`MTLArgumentAccessReadOnly`](/documentation/Metal/MTLBindingAccess/MTLArgumentAccessReadOnly)

The function can only read its argument data.

[`MTLArgumentAccessWriteOnly`](/documentation/Metal/MTLBindingAccess/MTLArgumentAccessWriteOnly)

The function can only write its argument data.

[`MTLArgumentAccessReadWrite`](/documentation/Metal/MTLBindingAccess/MTLArgumentAccessReadWrite)

The function can either read or write its argument data.


---

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