Struct std::hash::BuildHasherDefault 1.7.0
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[src]
pub struct BuildHasherDefault<H>(_);
The BuildHasherDefault structure is used in scenarios where one has a
type that implements Hasher and Default, but needs that type to
implement BuildHasher.
This structure is zero-sized and does not need construction.
Examples
Using BuildHasherDefault to specify a custom BuildHasher for
HashMap:
use std::collections::HashMap; use std::hash::{BuildHasherDefault, Hasher}; #[derive(Default)] struct MyHasher; impl Hasher for MyHasher { fn write(&mut self, bytes: &[u8]) { // Your hashing algorithm goes here! unimplemented!() } fn finish(&self) -> u64 { // Your hashing algorithm goes here! unimplemented!() } } type MyBuildHasher = BuildHasherDefault<MyHasher>; let hash_map = HashMap::<u32, u32, MyBuildHasher>::default();Run
Trait Implementations
impl<H> Default for BuildHasherDefault<H>[src]
fn default() -> BuildHasherDefault<H>
Returns the "default value" for a type. Read more
impl<H> Clone for BuildHasherDefault<H>[src]
fn clone(&self) -> BuildHasherDefault<H>
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)1.0.0
Performs copy-assignment from source. Read more
impl<H> BuildHasher for BuildHasherDefault<H> where H: Default + Hasher[src]
type Hasher = H
Type of the hasher that will be created.
fn build_hasher(&self) -> H
Creates a new hasher. Read more