1.7.0[−][src]Struct tract_hir::internal::tract_downcast_rs::__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();
Trait Implementations
impl<H> BuildHasher for BuildHasherDefault<H> where
H: Default + Hasher,
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H: Default + Hasher,
impl<H> Clone for BuildHasherDefault<H>
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fn clone(&self) -> BuildHasherDefault<H>
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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>
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fn default() -> BuildHasherDefault<H>
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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,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow(&self) -> &TⓘNotable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, 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;
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Notable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, 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<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut TⓘNotable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, 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;
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Notable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, 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<T> Downcast for T where
T: Any,
T: Any,
fn into_any(self: Box<T>) -> Box<dyn Any + 'static>ⓘNotable traits for Box<R>
impl<R> Read for Box<R> where
R: Read + ?Sized, impl<W> Write for Box<W> where
W: Write + ?Sized, impl<F> Future for Box<F> where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<I> Iterator for Box<I> where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
Notable traits for Box<R>
impl<R> Read for Box<R> where
R: Read + ?Sized, impl<W> Write for Box<W> where
W: Write + ?Sized, impl<F> Future for Box<F> where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<I> Iterator for Box<I> where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>
fn as_any(&self) -> &(dyn Any + 'static)
fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
impl<T> DowncastSync for T where
T: Send + Sync + Any,
T: Send + Sync + Any,
impl<T> DynClone for T where
T: Clone,
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T: Clone,
impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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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>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,