Trait Hasher

pub trait Hasher: Sync + Send {
    type Out: AsRef<[u8]> + AsMut<[u8]> + Default + MaybeDebug + Ord + PartialEq + Eq + Hash + Send + Sync + Clone + Copy;
    type StdHasher: Sync + Send + Default + Hasher;

    const LENGTH: usize;

    // Required method
    fn hash(x: &[u8]) -> Self::Out;
}

Trait describing an object that can hash a slice of bytes. Used to abstract other types over the hashing algorithm. Defines a single hash method and an Out associated type with the necessary bounds.

Required Associated Constants

const LENGTH: usize

The length in bytes of the Hasher output.

Required Associated Types

type Out: AsRef<[u8]> + AsMut<[u8]> + Default + MaybeDebug + Ord + PartialEq + Eq + Hash + Send + Sync + Clone + Copy

The output type of the Hasher

type StdHasher: Sync + Send + Default + Hasher

What to use to build HashMaps with this Hasher.

Required Methods

fn hash(x: &[u8]) -> Self::Out

Compute the hash of the provided slice of bytes returning the Out type of the Hasher.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl Hasher for Blake2Hasher

const LENGTH: usize = 32usize

type Out = H256

type StdHasher = Hash256StdHasher

fn hash(x: &[u8]) -> <Blake2Hasher as Hasher>::Out

impl Hasher for BlakeTwo256

const LENGTH: usize = 32usize

type Out = H256

type StdHasher = Hash256StdHasher

fn hash(s: &[u8]) -> <BlakeTwo256 as Hasher>::Out

impl Hasher for Keccak256

const LENGTH: usize = 32usize

type Out = H256

type StdHasher = Hash256StdHasher

fn hash(s: &[u8]) -> <Keccak256 as Hasher>::Out

impl Hasher for KeccakHasher

const LENGTH: usize = 32usize

type Out = H256

type StdHasher = Hash256StdHasher

fn hash(x: &[u8]) -> <KeccakHasher as Hasher>::Out

impl Hasher for KeccakHasher

const LENGTH: usize = 32usize

type Out = H256

type StdHasher = Hash256StdHasher

fn hash(x: &[u8]) -> <KeccakHasher as Hasher>::Out

Implementors