Struct ahash::ABuildHasher

[+] Show declaration

pub struct ABuildHasher { /* fields omitted */ }

[−] Expand description

Provides a Hasher factory. This is typically used (e.g. by [HashMap]) to create AHashers in order to hash the keys of the map. See build_hasher below.

Implementations

impl ABuildHasher[−]

pub fn new() -> ABuildHasher

Trait Implementations

impl BuildHasher for ABuildHasher[+]

type Hasher = AHasher

Type of the hasher that will be created.

fn build_hasher(&self) -> AHasher[−]

Constructs a new AHasher with keys based on compile time generated constants** and the location of the this object in memory. This means that two different BuildHashers will will generate AHashers that will return different hashcodes, but Hashers created from the same BuildHasher will generate the same hashes for the same input data.

** - only if the compile-time-rng feature is enabled.

Examples

use ahash::{AHasher, ABuildHasher};
use std::hash::{Hasher, BuildHasher};

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

hasher_1.write_u32(1234);
hasher_2.write_u32(1234);

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

let other_build_hasher = ABuildHasher::new();
let mut different_hasher = other_build_hasher.build_hasher();
different_hasher.write_u32(1234);
assert_ne!(different_hasher.finish(), hasher_1.finish());

impl Clone for ABuildHasher[+]

[+] Show hidden undocumented items

fn clone(&self) -> ABuildHasher[−]

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)[−]

Performs copy-assignment from source.

impl Default for ABuildHasher[+]

[+] Show hidden undocumented items

fn default() -> Self[−]

Returns the "default value" for a type.