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# core::hash::HashStateExTrait

Extension trait for hash state accumulators.
This trait adds the `update_with` method to hash states, allowing you to directly hash values of
any type T that implements `Hash`, rather than having to manually convert values to felt252
first. This provides a more ergonomic API when working with complex types.

## Signature

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

## Trait functions

### update\_with

Updates the hash state with the given value and returns the updated state.

#### Signature

```rust theme={null}
fn update_with(self: S, value: T) -> S
```

#### Examples

```rust theme={null}
use core::pedersen::PedersenTrait;
use core::hash::HashStateExTrait;

#[derive(Copy, Drop, Hash)]
struct Point { x: u32, y: u32 }

let point = Point { x: 1, y: 2 };
let hash = PedersenTrait::new(0)
    .update_with(point)
    .update_with(42)
    .finalize();
```