pub struct BuildHasherDefault<H>(_);
Used to create a default BuildHasher instance for types that implement Hasher and Default.
BuildHasherDefault<H> can be used when a type H implements Hasher and Default, and you need a corresponding BuildHasher instance, but none is defined.
Any BuildHasherDefault is zero-sized. It can be created with default. When using BuildHasherDefault with HashMap or HashSet, this doesn't need to be done, since they implement appropriate Default instances themselves.
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();impl<H> BuildHasher for BuildHasherDefault<H> where
H: Default + Hasher, [src]
impl<H> Clone for BuildHasherDefault<H>[src]
fn clone(&self) -> BuildHasherDefault<H>[src]
fn clone_from(&mut self, source: &Self)[src]1.0.0
impl<H> Debug for BuildHasherDefault<H>[src]1.9.0
impl<H> Default for BuildHasherDefault<H>[src]
fn default() -> BuildHasherDefault<H>[src]
impl<H> Eq for BuildHasherDefault<H>[src]1.29.0
impl<H> PartialEq<BuildHasherDefault<H>> for BuildHasherDefault<H>[src]1.29.0
impl<H> RefUnwindSafe for BuildHasherDefault<H> where
H: RefUnwindSafe, impl<H> Send for BuildHasherDefault<H> where
H: Send, impl<H> Sync for BuildHasherDefault<H> where
H: Sync, impl<H> Unpin for BuildHasherDefault<H> where
H: Unpin, impl<H> UnwindSafe for BuildHasherDefault<H> where
H: UnwindSafe, impl<T> Any for T where
T: 'static + ?Sized, [src]
impl<T> Borrow<T> for T where
T: ?Sized, [src]
fn borrow(&self) -> &TⓘNotable traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized,
type Output = <F as Future>::Output;
impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized,
type Item = <I as Iterator>::Item;
impl<R: Read + ?Sized, '_> Read for &'_ mut R
impl<W: Write + ?Sized, '_> Write for &'_ mut W
[src]
impl<T> BorrowMut<T> for T where
T: ?Sized, [src]
fn borrow_mut(&mut self) -> &mut TⓘNotable traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized,
type Output = <F as Future>::Output;
impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized,
type Item = <I as Iterator>::Item;
impl<R: Read + ?Sized, '_> Read for &'_ mut R
impl<W: Write + ?Sized, '_> Write for &'_ mut W
[src]
impl<T> From<T> for T[src]
impl<T, U> Into<U> for T where
U: From<T>, [src]
impl<T> ToOwned for T where
T: Clone, [src]
type Owned = TThe resulting type after obtaining ownership.
fn to_owned(&self) -> T[src]
fn clone_into(&self, target: &mut T)[src]
impl<T, U> TryFrom<U> for T where
U: Into<T>, [src]
type Error = InfallibleThe type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]
impl<T, U> TryInto<U> for T where
U: TryFrom<T>, [src]
© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/hash/struct.BuildHasherDefault.html