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 them.

For each instance of LocationBasedState, the AHashers created by build_hasher 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.