Struct ahash::LocationBasedState

pub struct LocationBasedState {}

Provides a BuildHasher is typically used (e.g. by HashMap) to create AHashers for each key such that they are hashed independently of one another, since AHashers contain state.

LocationBasedState uses it's in-memory location to see the AHasher. This is more predictable than true random values, but does not require generating randomness.

For each instance of LocationBasedState, the AHashers created by BuildHasher should be identical. That is, if the same stream of bytes is fed into each hasher, the same output will also be generated.

Examples

use ahash::LocationBasedState;
use std::hash::{BuildHasher, Hasher};

let s = LocationBasedState::new();
let mut hasher_1 = s.build_hasher();
let mut hasher_2 = s.build_hasher();

hasher_1.write_u32(8128);
hasher_2.write_u32(8128);

assert_eq!(hasher_1.finish(), hasher_2.finish());

Methods

impl LocationBasedState

pub fn new() -> LocationBasedState

Trait Implementations

impl Default for LocationBasedState

fn default() -> LocationBasedState

Returns the "default value" for a type.

impl BuildHasher for LocationBasedState

type Hasher = AHasher

Type of the hasher that will be created.

fn build_hasher(&self) -> AHasher

Creates a new hasher.