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# core::traits::BitNot

The bitwise NOT operator `~`.

## Signature

```rust theme={null}
pub trait BitNot
```

## Examples

An implementation of `BitNot` for a wrapper around `u8`.

```rust theme={null}
use core::traits::BitNot;

#[derive(Drop, PartialEq)]
struct Wrapper {
    u8: u8,
}

impl BitNotWrapper of BitNot {
    fn bitnot(a: Wrapper) -> Wrapper {
        Wrapper { u8: ~a.u8 }
    }
}

assert!(~Wrapper { u8: 0 } == Wrapper { u8 : 255 });
assert!(~Wrapper { u8: 1 } == Wrapper { u8 : 254 });
```

## Trait functions

### bitnot

Performs the `~` operation.

#### Signature

```rust theme={null}
fn bitnot(a: T) -> T
```

#### Examples

```rust theme={null}
assert!(~1_u8 == 254);
```