> ## Documentation Index
> Fetch the complete documentation index at: https://docs.starknet.io/llms.txt
> Use this file to discover all available pages before exploring further.

# core::internal::OptionRev

Same as `Option`, except that the order of the variants is reversed.
This is used as the return type of some libfuncs for efficiency reasons.

## Signature

```rust theme={null}
pub enum OptionRev {
    None,
    Some: T,
}
```

## Variants

### None

#### Signature

```rust theme={null}
None
```

### Some

#### Signature

```rust theme={null}
Some: T
```