1.7.0[−][src]Struct std::hash::BuildHasherDefault
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.
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> BuildHasher for BuildHasherDefault<H> where
H: Default + Hasher, [src]
H: Default + Hasher,
impl<H> Clone for BuildHasherDefault<H>[src]
fn clone(&self) -> BuildHasherDefault<H>[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl<H> Debug for BuildHasherDefault<H>1.9.0[src]
impl<H> Default for BuildHasherDefault<H>[src]
fn default() -> BuildHasherDefault<H>[src]
impl<H> Eq for BuildHasherDefault<H>1.29.0[src]
impl<H> PartialEq<BuildHasherDefault<H>> for BuildHasherDefault<H>1.29.0[src]
Auto Trait Implementations
impl<H> RefUnwindSafe for BuildHasherDefault<H> where
H: RefUnwindSafe,
H: RefUnwindSafe,
impl<H> Send for BuildHasherDefault<H> where
H: Send,
H: Send,
impl<H> Sync for BuildHasherDefault<H> where
H: Sync,
H: Sync,
impl<H> Unpin for BuildHasherDefault<H> where
H: Unpin,
H: Unpin,
impl<H> UnwindSafe for BuildHasherDefault<H> where
H: UnwindSafe,
H: UnwindSafe,
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized, [src]
T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized, [src]
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized, [src]
T: ?Sized,
fn borrow_mut(&mut self) -> &mut T[src]
impl<T> From<T> for T[src]
impl<T, U> Into<U> for T where
U: From<T>, [src]
U: From<T>,
impl<T> ToOwned for T where
T: Clone, [src]
T: Clone,
type Owned = T
The 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]
U: Into<T>,
type Error = Infallible
The 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]
U: TryFrom<T>,